MatGas Research Center

Barcelona, Spain

MatGas Research Center

Barcelona, Spain

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Perez-Marin A.P.,Autonomous University of Barcelona | Lopeandia A.F.,Autonomous University of Barcelona | Abad L.,CSIC - National Center of Microelectronics | Abad L.,Matgas Research Center | And 7 more authors.
Nano Energy | Year: 2014

We report the development of a Si-based micro thermogenerator build from silicon-on-insulator by using standard CMOS processing. Ultrathin single-crystalline Si membranes, 100nm in thickness, with embedded n and p-type doped regions electrically connected in series and thermally in parallel, are active elements of the thermoelectric device that generate thermopower under various thermal gradients. This proof-of-concept device produces an output power density of 4.5μW/cm2, under a temperature difference of 5K, opening the way to envisage integration as wearable thermoelectrics for body energy scavenging. © 2013 Elsevier Ltd.


Riudavets J.,IRTA - Institute of Agricultural-Alimentary Research and Technology | Pons M.J.,MatGas Research Center | Gabarra R.,IRTA - Institute of Agricultural-Alimentary Research and Technology | Castane C.,IRTA - Institute of Agricultural-Alimentary Research and Technology | And 5 more authors.
Journal of Stored Products Research | Year: 2014

Modified atmospheres (MAs) are safe and environmentally friendly alternatives to control pests in stored products. However, to accommodate the requirements of the food industry, the control of insects by aMA can be a too lengthy process. This paper describes the potential of sulphur dioxide as an additive to reduce the long lethal exposure of modified atmospheres (MA) enriched with carbon dioxide for major stored product pests. Specifically, we evaluated whether the addition of SO2 (0-30,000ppm) to a high-CO2 content of 70%-95% MA could enhance its insecticidal effect for the control of Sitophilus oryzae and Tribolium confusum. The addition of 15,000ppm and 30,000ppm of SO2 to 95% CO2 enhanced control up to 100% in comparison to CO2 alone for S.oryzae and T.confusum adults when treated for one day in all of the substrates tested. However, the effectiveness of adding SO2 at reduced contents was lower and depended on the substrate and pest species considered. The addition of SO2 also increased the mortality of all of the developmental stages of S.oryzae. The increase in mortality with the addition of SO2 was also observed when included with 70% CO2. Therefore, the addition of SO2 can be considered a feasible means of shortening the length of treatment necessary to achieve the control of these two pests using a high-CO2 MA. © 2013 Elsevier Ltd.


Ferrando-Villalba P.,Autonomous University of Barcelona | Lopeandia A.F.,Autonomous University of Barcelona | Abad L.,CSIC - National Center of Microelectronics | Abad L.,Matgas Research Center | And 11 more authors.
Nanotechnology | Year: 2014

We measure the thermal conductivity of a 17.5-nm-thick single crystalline Si layer by using a suspended structure developed from a silicon-on-insulator wafer, in which the Si layer bridges the suspended platforms. The obtained value of 19 Wm-1 K-1 at room temperature represents a tenfold reduction with respect to bulk Si. This design paves the way for subsequent lateral nanostructuration of the layer with lithographic techniques, to define different geometries such as Si nanowires, nanostrips or phononic grids. As a proof of concept, nanostrips of 0.5 ש2014 IOP Publishing Ltd Printed in the UK.


Builes S.,MatGas Research Center | Roussel T.,MatGas Research Center | Ghimbeu C.,CNRS Mulhouse Institute of Materials Science | Parmentier J.,CNRS Mulhouse Institute of Materials Science | And 3 more authors.
10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings | Year: 2010

Two highly ordered microporous carbons (Zeolite Templated Carbons (ZTC)) were characterized by molecular simulations. The adsorption isotherms of CO2 at 298 K in two synthesized ZTC (EMT-ZTC and FAU-ZTC) were investigated. Insights into the ZTC nanostructure, using CO2 as a probe of their microporosity, were provided. A criterion to identify on the adsorption isotherm a successfully synthesized EMT-ZTC hollow skeleton was presented. Results on the adsorption in FAU-ZTC showed the influence of the high curvature of this material. This is an abstract of a paper presented at the 2010 AIChE Annual Meeting (Salt Lake City, UT 11/7-12/2010).

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