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News Article | December 12, 2016
Site: www.businesswire.com

ALBUQUERQUE, N.M.--(BUSINESS WIRE)--Optomec - a leading global supplier of production-grade additive manufacturing systems for 3D printed metals – today announced that the University of Nebraska-Lincoln (UNL) has ordered a LENS 3D Metal Hybrid Controlled Atmosphere System. The controlled atmosphere hybrid 3D metal printer is part of the new LENS Machine Tool Series from Optomec, which was announced at the International Machine Tool Show (IMTS) earlier this year. (Click here for more information.) The LENS Machine Tool series combines a high-quality CNC vertical mill from Fryer Machine Systems with industry-proven Optomec LENS Print Engine technology to enable low-cost, high-value metal additive and subtractive metal working at a breakthrough price point. “This is the first Powder Fed Directed Energy Deposition system that is both hybrid and has a controlled atmosphere chamber, which is exactly what we need to maximize our industry research and enable us to work with reactive materials. As an early adopter of this unique new system, we gain 3D printing capabilities matched nowhere else in the world,” said Michael P. Sealy, Ph.D., Assistant Professor, Department of Mechanical & Materials Engineering at University of Nebraska. “We’ve invested in establishing leadership in hybrid manufacturing research and are pleased to partner with Optomec to further this position. This printer will be a core tool for our College of Engineering and will enable us to tap the full potential of our industry-driven research.” UNL will use its Controlled Atmosphere system to advance research in key areas such as heavy machinery, medical devices, and aeronautics. To maximize research potential, UNL needed a machine that could perform both additive and subtractive processes, but also operate in an enclosed environment so that oxygen can be purged from the system to allow for the printing of metals such as titanium and aluminum. The LENS 3D Metal Hybrid Controlled Atmosphere System is the first commercially-available machine of its kind to provide hybrid manufacturing capabilities for reactive metals and aluminum. The LENS 3D Metal Hybrid Controlled Atmosphere System is one of three models that comprise the new LENS Machine Tool Series. Pricing for the new series starts at $249,500 for the LENS 3D Metal Additive System. Optomec is a privately-held, rapidly growing supplier of Additive Manufacturing systems. Optomec’s patented Aerosol Jet Systems for printed electronics and LENS 3D Printers for metal components are used by industry to reduce product cost and improve performance. Together, these unique printing solutions work with the broadest spectrum of functional materials, ranging from electronic inks to structural metals and even biological matter. Optomec has more than 200 marquee customers around the world, targeting production applications in the Electronics, Energy, Life Sciences and Aerospace industries. LENS (Laser Engineered Net Shaping) is a registered trademark of Sandia National Laboratories. Aerosol Jet and Optomec are registered trademarks of Optomec Inc.


News Article | February 15, 2017
Site: www.materialstoday.com

BROWSE OUR BOOKS AND ORDER WITH AN EXCLUSIVE DISCOUNT Stop by the Elsevier/ Materials Today booth #1010 and browse new and classic books on display and take advantage of exclusive conference discounts. Not attending? You can still take advantage of conference savings by visiting Elsevier.com. Save 30% plus free shipping, use discount code MATER317 at the checkout. Meet Acquisitions Editor Christina Gifford, and Journals Executive Publisher Joe D‘Angelo at the booth, who will be on hand to discuss any book ideas, questions about our journals portfolio or publishing with Elsevier that you might have. Be sure to stop by the booth (#1010) daily or click here to complete the online survey to enter our book-a-day giveaway. If you win, which book will you choose? Click here for full terms and conditions. The essential, unique Reference Module in Materials Science and Materials Engineering is live on ScienceDirect! The Reference Module combines thousands of new and exclusive articles along with the content of 13 Major Reference Works into one interdisciplinary and authoritative resource. Articles will be continuously reviewed, updated and commissioned by the world-leading editorial board to ensure you are at the forefront of research. Find out more about the Materials Science and Materials Engineering Reference Module here. STAY CONNECTED, OR WRITE FOR OUR BLOG! Catch up on new research, chat with your colleagues, learn from the experts, and find special deals from Elsevier through our social media sites! You can join our Engineering communities on Facebook and Twitter. Also, be sure to check out our articles on SciTech Connect, our blog for the science and technology community. If you are interested in submitting a blog post, complete the contribution form and we’ll be in touch! FIND THE BEST HOME FOR YOUR RESEARCH Materials Today is dedicated to the creation and sharing of materials science knowledge and experience. Supported by Elsevier, we publish journals that provide authors and readers with comprehensive coverage across materials science, spanning ground breaking discoveries to highly specialized research.


News Article | February 15, 2017
Site: www.marketwired.com

TORONTO, ON--(Marketwired - February 13, 2017) - Electrovaya (TSX: EFL) ( : EFLVF) is pleased to welcome Professor Carolyn Hansson CM, FCAE, FRSC, one of Canada's influential and innovative engineers to the Electrovaya Board of Directors. Professor Hansson has a long and distinguished career in industries such as Lockheed Martin (Martin Marietta), Danish Corrosion Labs and Bell Labs as well in academia (Waterloo, Queens, Columbia & SUNY) and was earlier a member of the Board of a TSX and NASDAQ listed Alternate Energy Company (Hydrogenics). A Professor of Materials Engineering at the University of Waterloo, Dr. Hansson is the recipient of many awards including the Order of Canada and is a member of several influential committees within North America and Europe. During her tenure as Vice President of Research at Waterloo University Professor Hansson drove innovation across all disciplines of the University. She has wide connections within innovation circles in Canada, USA and Europe having lived and worked on both sides of the Atlantic. "Carolyn has great practical experience in industry, government and academia and we are delighted that she has agreed to join the Board of Directors at Electrovaya," said Dr. Sankar Das Gupta, Chairman & CEO of Electrovaya. "The advanced Lithium Ion battery is the key defining technology needed today and Electrovaya provides this critical next generation technology to the emerging alternate energy sector. I am very pleased to join the Board and help build the Company," said Prof. Hansson. Electrovaya Inc. (TSX: EFL) ( : EFLVF) designs, develops and manufactures proprietary Lithium Ion Super Polymer® batteries, battery systems, and battery-related products for energy storage, clean electric transportation and other specialized applications. Electrovaya, through its fully owned subsidiary, Litarion GmbH, also produces cells, electrodes and SEPARION® ceramic separators and has manufacturing capacity of about 500MWh/annum. Electrovaya is a technology focused company with extensive patents and other Intellectual Property. Headquartered in Ontario, Canada, Electrovaya has production facilities in Canada and Germany with customers around the globe. To learn more about how Electrovaya and Litarion are powering mobility and energy storage, please explore www.electrovaya.com, www.litarion.com and www.separion.com This press release contains forward-looking statements, including statements that relate to, among other things, revenue forecasts, technology development progress, plans for shipment using the Company's technology, production plans, the Company's markets, objectives, goals, strategies, intentions, beliefs, expectations and estimates, and can generally be identified by the use of words such as "may", "will", "could", "should", "would", "likely", "possible", "expect", "intend", "estimate", "anticipate", "believe", "plan", "objective" and "continue" (or the negative thereof) and words and expressions of similar import. Although the Company believes that the expectations reflected in such forward-looking statements are reasonable, such statements involve risks and uncertainties, and undue reliance should not be placed on such statements. Certain material factors or assumptions are applied in making forward-looking statements, and actual results may differ materially from those expressed or implied in such statements. Important factors that could cause actual results to differ materially from expectations include but are not limited to: general business and economic conditions (including but not limited to currency rates and creditworthiness of customers); Company liquidity and capital resources, including the availability of additional capital resources to fund its activities; level of competition; changes in laws and regulations; legal and regulatory proceedings; the ability to adapt products and services to the changing market; the ability to attract and retain key executives; and the ability to execute strategic plans. Additional information about material factors that could cause actual results to differ materially from expectations and about material factors or assumptions applied in making forward-looking statements may be found in the Company's most recent annual and interim Management's Discussion and Analysis under "Risk and Uncertainties" as well as in other public disclosure documents filed with Canadian securities regulatory authorities. The Company does not undertake any obligation to update publicly or to revise any of the forward-looking statements contained in this document, whether as a result of new information, future events or otherwise, except as required by law.


HOUSTON, Dec. 20, 2016 (GLOBE NEWSWIRE) -- Synthesis Energy Systems, Inc. (SES) (NASDAQ:SYMX), the global leader in low cost, high performance clean energy gasification technology, today announced that Chris Raczkowski, an accomplished leader and engineer whose career focus on clean energy technologies includes 17 years of professional experience and living in China and Southeast Asia, has joined the team as President – Asia. Raczkowski will report to SES’s President and CEO, DeLome Fair. Raczkowski’s priority focus will be to expand SES’s business presence and technology adoption in Asia. His 25-year career includes energy project development in China, Vietnam, Thailand and Malaysia. He has been responsible for managing project identification, contracting, construction and operations, as well as technology development. Raczkowski has a core understanding of SES Gasification Technology (SGT), having served as Vice President Engineering for SES during the development and construction of the SES Gasification Technology (SGT) demonstration plant in Shandong Province, China. “I am excited to have Chris onboard so that we have added leadership and increased bandwidth to match the global opportunity that our technology affords the developing economies of the world. We believe we have a strong runway in China and we are fielding ever-increasing inquiries from India and numerous other countries in the region,” said DeLome Fair. “Chris will provide additional leadership in China to more quickly drive to completion our ongoing activities there, including our multi-project platform in Shandong anchored by our hydrogen projects in Dongying, and the new tar to diesel project in ZaoZhuang City. Chris’s ability to provide leadership beyond China and into the broader region of Asia is well timed for us to execute on the globalization of our technology and our planned equity investment projects to answer the global demand for an economic and sustainable clean energy solution.” Before joining SES, Chris served as CEO of Azure International, a Beijing-based research, engineering and investment firm focused on sustainable energy solutions, which he co-founded in 2003 and sold to Ecofys, a Dutch company, in 2008. He led the acquisition of new technology partners, and strategically shifted the corporate focus from power generation, such as wind and bioenergy, to energy storage and industrial/building energy efficiency. He also co-led successful development of the Azure Cleantech Energy Fund, a small US-based venture investment fund focused on early stage clean energy firms where China activities are a core to the company’s development strategy. Raczkowski’s career also includes serving as China/SE Asia Managing Director for Rhodia Energy, 2009-2011, where he led a team of over 30 for bioenergy/biogas project development, with three projects realized in China, Vietnam and Malaysia. His first career position in Asia-Pacific was as Asia Operations Manager with Perkin Elmer OptoElectronics, 1999-2001, where Raczkowski’s responsibilities included planning and managing the full financial, sourcing and manufacturing operations of two product lines in Shenzhen, China, and technology transfer project planning, execution, as well as staffing of four new manufacturing operations in China, Singapore and Indonesia. “SES’s gasification technology’s feedstock flexibility is without equal. Its unique ability to transform Asia’s abundant low-cost, low-grade coal and coal waste into energy products in growing demand makes it the optimum responsible coal solution. That SGT can also use renewable biomass and MSW as interchangeable or blended feedstocks with coal on one SGT system makes SGT today’s and tomorrow’s clean energy solution,” said Raczkowski. “I am excited to be rejoining my colleagues at SES to accelerate adoption of this proven superior cost-effective and efficient technology throughout this region of the world where natural gas is expensive and/or unavailable.” Raczkowski received his Bachelor of Science in Materials Engineering and his Master of Science in Mechanical Engineering and Management at Harvey Mudd College, and a Master of Business Administration from NIMBAS Graduate School of Management, based in the Netherlands. Synthesis Energy Systems (SES) is a Houston-based technology company focused on bringing clean high-value energy to developing countries from low-cost and low-grade coal, biomass and municipal solid waste through its proprietary gasification technology based upon U-Gas®, licensed from the Gas Technology Institute. The SES Gasification Technology (SGT) can produce clean, low-cost syngas for power generation, industrial fuels, chemicals, fertilizers, and transportation fuels, replacing expensive natural gas based energy. SGT can also produce high-purity hydrogen for cleaner transportation fuels. SGT enables Growth With Blue Skies, and greater fuel flexibility for both large-scale and efficient small- to medium-scale operations close to fuel sources. Fuel sources include low-rank, low-cost high ash, high moisture coals, which are significantly cheaper than higher grade coals, many coal waste products, biomass, and municipal solid waste feedstocks. For more information, please visit: www.synthesisenergy.com. Forward-Looking Statements This press release includes "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact are forward-looking statements. Forward-looking statements are subject to certain risks, trends and uncertainties that could cause actual results to differ materially from those projected. Among those risks, trends and uncertainties are the ability of our project with Yima to produce earnings and pay dividends; our ability to develop and expand business of the TSEC joint venture in the joint venture territory; our ability to successfully partner our technology business; our ability to develop our power business unit and marketing arrangement with GE and our other business verticals, including DRI steel, through our marketing arrangement with Midrex Technologies, and renewables; our ability to successfully develop the SES licensing business; the ability of the ZZ Joint Venture to retire existing facilities and equipment and build another SGT facility; the ability of Batchfire management to successfully grow and develop Callide operations; the economic conditions of countries where we are operating; events or circumstances which result in an impairment of our assets; our ability to reduce operating costs; our ability to make distributions and repatriate earnings from our Chinese operations; our ability to successfully commercialize our technology at a larger scale and higher pressures; commodity prices, including in particular natural gas, crude oil, methanol and power, the availability and terms of financing; our ability to obtain the necessary approvals and permits for future projects, our ability to raise additional capital, if any, our ability to estimate the sufficiency of existing capital resources; the sufficiency of internal controls and procedures; and our results of operations in countries outside of the U.S., where we are continuing to pursue and develop projects. Although SES believes that in making such forward-looking statements our expectations are based upon reasonable assumptions, such statements may be influenced by factors that could cause actual outcomes and results to be materially different from those projected by us. SES cannot assure you that the assumptions upon which these statements are based will prove to have been correct.


News Article | February 28, 2017
Site: www.cemag.us

Kaunas University of Technology (KTU) laboratories often serve as birthplaces of unique products, such as antimicrobial silicone invented by Aiste Lisauskaite and her supervisor Dr. Virginija Jankauskaite. The researchers believe that the new product will be extremely useful both for household and medical purposes. Lisauskaite, who is a PhD student at the KTU Faculty of Mechanical Engineering and Design, Department of Materials Engineering, presented her invention at the Life Sciences Baltics Conference last year. Her innovation was selected as one of the top five at the conference, and received enormous attention of industry professionals from various countries. “The silicone has antimicrobial effect both on gram-positive and on gram-negative microbial strains and fungi. Its antimicrobial effect can be used in various situations, when there is a risk to acquire bacterial infection,” says Lisauskaite. Antimicrobial silicone can be used in hospitals, health care centers, and other similar institutions. “The new product can be used in blood, urinary, and respiratory catheters, it can be applied for various tubes and implants, and used for many different medical purposes. The household usage ranges from children toys’ lining, transport, or packaging,” Lisauskaitė says. Catheters or silicones, dipped in or coated with silver compounds, have already been used for some time. However, the antimicrobial silicone developed at KTU is based on completely different technology and different materials. So far, it is a unique product in the world. The researchers have been working on the production of the antimicrobial silicone for four years. “I have received many inquiries into the idea and its commercialization. In the future, I hope not only to develop my ideas, of which I have a lot of, but also to introduce competitive and advanced products to the market,” says Lisauskaite. Paulius Kozlovas, technology transfer manager at KTU National Innovation and Entrepreneurship Centre, is convinced that the innovative technology has broad commercialization possibilities. “We can definitely see that businesses today are more and more interested into innovative solutions. Aiste’s product has broad application possibilities, and we have already applied for European patent. After acquiring the patent and having the product’s intellectual rights protected, we will be able to proceed with discussions with potential investors. I see huge potential of success in international markets and the possibility to attract foreign investors to Lithuania,” says Kozlovas.


News Article | February 28, 2017
Site: www.cemag.us

Kaunas University of Technology (KTU) laboratories often serve as birthplaces of unique products, such as antimicrobial silicone invented by Aiste Lisauskaite and her supervisor Dr. Virginija Jankauskaite. The researchers believe that the new product will be extremely useful both for household and medical purposes. Lisauskaite, who is a PhD student at the KTU Faculty of Mechanical Engineering and Design, Department of Materials Engineering, presented her invention at the Life Sciences Baltics Conference last year. Her innovation was selected as one of the top five at the conference, and received enormous attention of industry professionals from various countries. “The silicone has antimicrobial effect both on gram-positive and on gram-negative microbial strains and fungi. Its antimicrobial effect can be used in various situations, when there is a risk to acquire bacterial infection,” says Lisauskaite. Antimicrobial silicone can be used in hospitals, health care centers, and other similar institutions. “The new product can be used in blood, urinary, and respiratory catheters, it can be applied for various tubes and implants, and used for many different medical purposes. The household usage ranges from children toys’ lining, transport, or packaging,” Lisauskaitė says. Catheters or silicones, dipped in or coated with silver compounds, have already been used for some time. However, the antimicrobial silicone developed at KTU is based on completely different technology and different materials. So far, it is a unique product in the world. The researchers have been working on the production of the antimicrobial silicone for four years. “I have received many inquiries into the idea and its commercialization. In the future, I hope not only to develop my ideas, of which I have a lot of, but also to introduce competitive and advanced products to the market,” says Lisauskaite. Paulius Kozlovas, technology transfer manager at KTU National Innovation and Entrepreneurship Centre, is convinced that the innovative technology has broad commercialization possibilities. “We can definitely see that businesses today are more and more interested into innovative solutions. Aiste’s product has broad application possibilities, and we have already applied for European patent. After acquiring the patent and having the product’s intellectual rights protected, we will be able to proceed with discussions with potential investors. I see huge potential of success in international markets and the possibility to attract foreign investors to Lithuania,” says Kozlovas.


News Article | February 28, 2017
Site: phys.org

Lisauskaite, who is a PhD student at the KTU Faculty of Mechanical Engineering and Design, Department of Materials Engineering, has presented her invention at the Life Sciences Baltics Conference last year. Her innovation was selected as one of the top five at the Conference, and received enormous attention of industry professionals from various countries. "The silicone has antimicrobial effect both on gram-positive and on gram-negative microbial strains and fungi. Its antimicrobial effect can be used in various situations, when there is a risk to acquire bacterial infection," says Lisauskaite. Antimicrobial silicone can be used in hospitals, health care centres and in other similar institutions. "The new product can be used in blood, urinary and respiratory catheters, it can be applied for various tubes and implants, and used for many different medical purposes. The household usage ranges from children toys' lining, transport or packaging," Lisauskaitė is convinced. Catheters or silicones, dipped in or coated with silver compounds have been already used for some time. However, the antimicrobial silicone developed at KTU is based on completely different technology and different materials. So far, it is a unique product in the world. The researchers have been working on the production of the antimicrobial silicone for 4 years. "I have received many inquiries into the idea and its commercialisation. In the future, I hope not only to develop my ideas, of which I have a lot of, but also to introduce competitive and advanced products to the market," says Lisauskaite, a young researcher at KTU. Paulius Kozlovas, technology transfer manager at KTU National Innovation and Entrepreneurship Centre is convinced that the innovative technology has broad commercialisation possibilities. "We can definitely see that businesses today are more and more interested into innovative solutions. Aiste's product has broad application possibilities, and we have already applied for European patent. After acquiring the patent and having the product's intellectual rights protected, we will be able to proceed with discussions with potential investors. I see huge potential of success in international markets and the possibility to attract foreign investors to Lithuania," says Kozlovas. Explore further: Does Agion silver technology work as an antimicrobial?


News Article | February 28, 2017
Site: www.eurekalert.org

Antimicrobial silicone was invented by a KTU Ph.D. student Aiste Lisauskaite and her supervisor Dr. Virginija Jankauskaite; the researchers believe that the new product will be extremely useful both for household and medical purposes Kaunas University of Technology (KTU) laboratories often serve as birthplaces of unique products, such as antimicrobial silicone invented by a KTU PhD student Aiste Lisauskaite and her supervisor Dr Virginija Jankauskaite. The researchers believe that the new product will be extremely useful both for household and medical purposes. Lisauskaite, who is a PhD student at the KTU Faculty of Mechanical Engineering and Design, Department of Materials Engineering, has presented her invention at the Life Sciences Baltics Conference last year. Her innovation was selected as one of the top five at the Conference, and received enormous attention of industry professionals from various countries. "The silicone has antimicrobial effect both on gram-positive and on gram-negative microbial strains and fungi. Its antimicrobial effect can be used in various situations, when there is a risk to acquire bacterial infection", says Lisauskaite. Antimicrobial silicone can be used in hospitals, health care centres and in other similar institutions. "The new product can be used in blood, urinary and respiratory catheters, it can be applied for various tubes and implants, and used for many different medical purposes. The household usage ranges from children toys' lining, transport or packaging", Lisauskait? is convinced. Catheters or silicones, dipped in or coated with silver compounds have been already used for some time. However, the antimicrobial silicone developed at KTU is based on completely different technology and different materials. So far, it is a unique product in the world. The researchers have been working on the production of the antimicrobial silicone for 4 years. "I have received many inquiries into the idea and its commercialisation. In the future, I hope not only to develop my ideas, of which I have a lot of, but also to introduce competitive and advanced products to the market", says Lisauskaite, a young researcher at KTU. Paulius Kozlovas, technology transfer manager at KTU National Innovation and Entrepreneurship Centre is convinced that the innovative technology has broad commercialisation possibilities. "We can definitely see that businesses today are more and more interested into innovative solutions. Aiste's product has broad application possibilities, and we have already applied for European patent. After acquiring the patent and having the product's intellectual rights protected, we will be able to proceed with discussions with potential investors. I see huge potential of success in international markets and the possibility to attract foreign investors to Lithuania", says Kozlovas.


News Article | February 20, 2017
Site: phys.org

The process of electrophoretic deposition (EPD) uses an electric field to drive colloidal particles suspended in a liquid from a solution onto a conductive substrate. Commonly used to apply paint to cars, EPD also is utilized to coat ceramics, metals and polymers with a range of materials and for 3-D printing objects. Developed using a particle dynamics framework and run on the Vulcan supercomputing system at LLNL, the newly published model tracks every single particle during the entire EPD process—each particle is about 200 nanometers wide, roughly the diameter of the smallest bacteria. The research is published in the Dec. 20 issue of the journal Langmuir . "This gives us more information than any model before and fresh insights that were previously inaccessible," said the study's LLNL postdoctoral researcher Brian Giera. "Within this particle dynamics framework we were able to get really detailed information. In terms of understanding the EPD process in detail, this is a first-of-its kind." Over a period of two years, the team, led by principal investigator Todd Weisgraber, a researcher from LLNL's Materials Engineering Division, developed the model and ran several dozens of different simulations, changing the strength of the electrical field and the concentration of salt in the system. Not only does the strength of the electrical field affect the development of crystals, Giera said, but salt concentration, surprisingly, also plays a key role. Giera said the model could be used to better understand deposition kinetics, determine how fast to build and anticipate resulting crystallinity, which could impact how armor is produced, and how coatings are applied using the EPD process. "The model is poised to take on a lot of questions," Giera said. "It gives us more predictive information to optimize the system." Luis Zepeda-Ruiz, a scientist in the Lab's Materials Science Division, built the initial model containing all the essential mechanisms before Giera took over the work. He said the model can be augmented to allow for virtually any type of material, extending the science to a broad range of applications. "Our computational model can access details that are extremely difficult to observe in real experiments," Zepeda-Ruiz said. "It also can be used when experiments fail to reproduce results, when the solution ages and changes its chemistry. Now we have a pure, reproducible means for doing EPD, and that's a benefit." The model has been so well received by the scientific community that it was selected to be presented in a keynote speech by Giera at the international Electrophoretic Deposition Conferences Series held in South Korea in October. LLNL researcher Andy Pascall, an expert in EPD, helped define the model's initial parameter choices and is working on validating it for future implementation. Pascall said the model will be particularly useful to the field of photonics science, which requires precise control over crystallization. "Photonic crystallization is interesting to the scientific community in general. The way this has been done before in the lab has been through trial and error," Pascall said. "It's fair to say this is the only particle-based EPD model out there. Having a model that can be predictive allows you to run hundreds of virtual experiments that would take us months to do in the lab." Next, Giera will study how the colloidal particles re-suspend and, more importantly, tailor the model to account for particles of different sizes. Explore further: Theoretical model reveals how droplets grow around tiny particles on a surface More information: Brian Giera et al. Mesoscale Particle-Based Model of Electrophoretic Deposition, Langmuir (2017). DOI: 10.1021/acs.langmuir.6b04010


News Article | February 28, 2017
Site: www.acnnewswire.com

Silicon nanowires fabricated using an imprinting technology could be the way of the future for transistor-based biosensors. Korean researchers are improving the fabrication of transistor-based biosensors by using silicon nanowires on their surface. The team, led by Won-Ju Cho of Kwangwoon University in Seoul, based their device on the 'dual-gate field-effect transistor' (DG FET). When molecules bind on a field-effect transistor, a change happens in the surface's electric charge. This makes FETs good candidates for detecting biological and chemical elements. Dual-gate FETs are particularly good candidates because they amplify this signal several times. But they can still be improved. The team used a method called 'nanoimprint lithography' to fabricate silicon nanowires onto the surface of a DG FET and compared its sensitivity and stability with conventional DG FETs. Field-effect transistors using silicon nanowires have already been drawing attention as promising biosensors because of their high sensitivity and selectivity, but they are difficult to manufacture. The size and position of silicon nanowires fabricated using a bottom-up approach, such as chemical vapor deposition, cannot always be perfectly controlled. Top-down approaches, such as using an electron or ion beam to draw nanorods onto a surface, allow better control of size and shape, yet they are expensive and limited by low throughput. Cho and his colleagues fabricated their silicon nanowires using nanoimprint lithography. In this method, a thin layer of silicon was placed on top of a substrate. This layer was then pressed using a nanoimprinter, which imprints nano-sized wire-shaped lines into the surface. The areas between separate lines were then removed using a method called dry etching, which involves bombarding the material with chlorine ions. The resultant silicon nanowires were then added to a DG FET. The team found that their device was more stable and sensitive than conventional DG FETs. "We expect that the silicon-nanowire DG FET sensor proposed here could be developed into a promising label-free sensor for various biological events, such as enzyme-substrate reactions, antigen-antibody bindings and nucleic acid hybridizations [a method used to detect gene sequences]," conclude the researchers in their study published in the journal Science and Technology of Advanced Materials. Article information Cheol-Min Lim, In-Kyu Lee, Ki Joong Lee, Young Kyoung Oh, Yong-Beom Shin and Won-Ju Cho. Improved sensing characteristics of dual-gate transistor sensor using silicon nanowire arrays defined by nanoimprint lithography. Science and Technology of Advanced Materials, 2016; 18:1, 17-25. http://dx.doi.org/10.1080/14686996.2016.1253409 For further information please contact: Professor Won-Ju Cho*, Department of Electronic Materials Engineering, Kwangwoon University, Korea *E-mail: Journal information Science and Technology of Advanced Materials (STAM), http://www.tandfonline.com/STAM) is an international open access journal in materials science. The journal covers a broad spectrum of topics, including synthesis, processing, theoretical analysis and experimental characterization of materials. Emphasis is placed on the interdisciplinary nature of materials science and on issues at the forefront of the field, such as energy and environmental issues, as well as medical and bioengineering applications. For more information about STAM contact Mikiko Tanifuji Publishing Director Science and Technology of Advanced Materials E-mail: Press release distributed by ResearchSEA for Science and Technology of Advanced Materials.

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