Lecoq E.,SAM |
Duday D.,SAM |
Bulou S.,SAM |
Frache G.,SAM |
And 3 more authors.
Plasma Processes and Polymers | Year: 2013
Plasma polymerization of 3-aminopropyl-triethoxysilane (APTES) in microwave late afterglow was studied. First, sol-gel polymerized APTES was prepared and characterized by ATR-FTIR and XPS. The results obtained were used as a model to define the nature of nitrogen containing groups in the plasma polymer layers. It is shown that the variation of process gas mixture gives the possibility to tailor the chemical composition of the coatings. We show that nitrogen can be present in the thin films as amines, amides, imines or oximes. The analysis of the gas phase composition by OES during the deposition process was realized and based on the correlations established between OES results and thin film compositions, some assumptions on the chemical mechanisms involved in the gas phase are discussed. Special attention is paid to FTIR and XPS characterization of pp-APTES thin films. To support the demonstration concerning data processing, the coatings are compared with a sol-gel APTES layer. Some correlations between thin films chemical structure and gas phase chemistry are established and some chemical mechanisms are proposed to explain the formation of nitrogen functionalities in the coatings. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Philipp P.,SAM |
Barry P.,SAM |
Surface and Interface Analysis | Year: 2014
In the present paper, we focus on the diffusion behaviour of cesium atoms implanted into silicon. This aspect has not been investigated directly up to now but is of utmost importance to understand the ionisation mechanisms in more detail. Density functional theory calculations combined with ab initio molecular dynamics simulations have been used to study the different aspects of cesium diffusion to the sample surface as a function of cesium concentration and sample temperature. In general, the solubility of cesium atoms in a silicon matrix is small, and the diffusion of the cesium atoms towards the surface is almost immediate, depending on how and where the cesium atom is incorporated in the silicon lattice. Depending on the defects introduced into the Si substrate, the diffusion could be largely reduced or cannot be observed during the few picosecond time range that can be explored by ab initio molecular dynamics simulations. Copyright © 2014 John Wiley & Sons, Ltd.
Nittler L.,SAM |
Nittler L.,Catholic University of Louvain |
Delcorte A.,Catholic University of Louvain |
Bertrand P.,Catholic University of Louvain |
Surface and Interface Analysis | Year: 2011
Pristine and Au-covered molecular films have been analyzed by ToF-SIMS for different amounts of evaporated gold. In contrast to other MetA-SIMS studies, the metallization of the high-mass polymers (polycarbonate and polystyrene) was carried out in situ. The evaporation flux was monitored with a quartz-crystal microbalance, and the exact quantity of deposited gold was determined by XPS. It was found that the sticking coefficient of gold on these polymers is less than one. The evolution of the secondary ion yield using Argon ion bombardment is studied as a function of the total amount of deposited metal. Furthermore, the SIMS results are accompanied by a detailed characterization of the sample surfaces morphology, in order to check any possible relation between the structure of the deposited metallic film and the yield enhancement of S-SIMS signals. Copyright © 2010 John Wiley & Sons, Ltd.
News Article | February 15, 2017
Sam & Associates Insurance Agency, a full service firm providing asset protection services and financial planning assistance to commercial and residential clients in the California Bay Area, is launching a charity drive to raise awareness of heart disease risk factors and promote positive heart health in the region. Heart disease is the primary killer of adult men and women in America, and is responsible for over 25% of total deaths in the US annually. Risk factors for heart disease are widely understood by the medical community, and this charity event intends to help share information about reducing the risk of heart disease to residents in and around the San Francisco Bay Area. “One in four Americans will die as a result of heart disease, but the good news is that heart disease is on the decline in our area, and this charity event will help ensure that this decline continues,” says Yumi Sam, founder and executive director of Sam & Associates Insurance Agency. Sam and her team are working to find support throughout San Francisco and other nearby communities by creating an online information sharing portal over social media channels and an email update system. Additional efforts to gather support for the charity event will include a full page feature story discussing the realities of heart disease which will soon be published in the Sam & Associates online magazine “Our Hometown”: http://www.agencysam.com/Our-Hometown-Magazine_41. A number of notable charities operating in the San Francisco area have received direct support from the Sam & Associates team over the last year. Sam & Associates is an affiliate of a nationwide charity support network called “Agents of Change,” and the team plans to continue sponsoring local charity events bimonthly. All readers who want additional information on the San Francisco area charity event to promote heart health, and those who wish to join Sam and her team as they promote this event, are encouraged to follow this link: http://www.agencysam.com/Promoting-Happy-Heart-Healthy-Lives_23_community_cause. Previous charity drives hosted by Sam & Associates Insurance Agency are listed on the firm’s Community Causes page: http://www.agencysam.com/community-cause. As a Personal Finance Representative in San Francisco, agency owner Yumi Sam knows many local families. Her knowledge and understanding of the people in her community ensures that clients of Sam & Associates Insurance Agency are provided with an outstanding level of service. Yumi and her team look forward to helping families protect the things that are most important - family, home, car and more. Sam & Associates Insurance Agency also offers clients a preparation strategy for achieving their financial goals. To contact an expert at Sam & Associates, visit http://www.agencysam.com/ or call (415) 665-0181.
News Article | October 28, 2016
Sam & Associates Insurance Agency, a locally operated firm providing insurance and financial consultation services to communities throughout the San Francisco Bay Area, is embarking on a charity effort to raise funds in honor of the National Coalition Against Domestic Violence. The National Coalition Against Domestic Violence is a nonprofit organization dedicated to the eradication of all forms of domestic abuse. In addition to working toward the improvement of public policy and educating the local community on the impact and outcomes of domestic violence, NCADV works with a network of similar organizations to offer multiple programs that directly aid abuse survivors. “Our mission is to give a voice to survivors of domestic violence, and to help create a zero tolerance culture regarding domestic abuse where victims are empowered and abusers are held accountable,” says Yumi Sam, manager and proprietor of Sam & Associates Insurance Agency. In an effort to support the NCADV charity event, Sam and her team are working to raise awareness of domestic abuse and generate donations for the event by reaching out to the local community over social media and email. As well, Sam & Associates Insurance is drafting a full length article discussing the domestic abuse issue and outlining the charity drive goals. The article is scheduled for publication in “Our Hometown,” the firm’s online magazine: http://www.agencysam.com/Our-Hometown-Magazine_41. Half a dozen charitable causes and nonprofit foundations have already enjoyed direct assistance from the Sam & Associates Insurance team since the beginning of the year. In January, Sam & Associates joined the national “Agents of Change” charity support campaign, and the agency plans to continue assisting local charities on a regular basis. Anyone who wants to join the Same & Associates team for the charity event to benefit the NCADV is urged to make a difference and support the cause by visiting this page and taking action: http://www.agencysam.com/Empowering-Victims-of-Domestic-Abuse_22_community_cause. Information regarding past charitable events hosted by the Sam & Associates Insurance Agency can be found on the company’s Community Causes page: http://www.agencysam.com/community-cause. As a Personal Finance Representative in San Francisco, agency owner Yumi Sam knows many local families. Her knowledge and understanding of the people in her community ensures that clients of Sam & Associates Insurance Agency are provided with an outstanding level of service. Yumi and her team look forward to helping families protect the things that are most important - family, home, car and more. Sam & Associates Insurance Agency also offers clients a preparation strategy for achieving their financial goals. To contact an expert at Sam & Associates, visit http://www.agencysam.com/ or call (415) 665-0181.