2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 7: Ionic Liquids & Energy Production
| Editors: | Kongoli F, Gaune-Escard M, Mauntz M, Rubinstein J, Dodds H.L. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 310 pages |
| ISBN: | 978-1-987820-30-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Wetting Technological Substrates with Ionic Liquids: An Experimental Study with Porous Silicon
Paul-Henri Haumesser1; Walid Darwich2; Piotr Bockowski1; Aude Charlot2; Frederic Gaillard1; Catherine Santini2;1CEA LETI, Grenoble, France; 2CNRS, Villeurbanne, France;
Type of Paper: Regular
Id Paper: 123
Topic: 13
Abstract:
The interfaces between solids and ionic liquids (ILs) play a central role in a variety of processes (stabilization of nano-suspensions, surface reactions, extraction) and devices (supercapacitors, captors, active electronic devices). This is why a lot of effort is currently devoted to the understanding of the local arrangement of the ILs near solid surfaces. However, most of this work is carried out through complicated computer simulations or onerous characterization techniques such as near-field microscopy or x-ray diffusion.<br />In this work, a more pragmatic approach is adopted, based on more conventional and accessible techniques such as wetting angle and electrochemical impedance spectrometry measurements. These techniques have been used to:<br />* Measure the capacitance of the electrical double layer on various electrodes<br />* Evaluate the kinetics of penetration of ILs into porous materials.<br />This knowledge has been used to successfully metallize a 3 micrometer thick layer of microporous Si with Cu, by penetration of a solution of mesitylcopper (CuMes) in 1-alkyl-3-methylimidazolium bistrifluoromethylsulphonylimide (C1C4ImNTf2), followed by in-situ decomposition of CuMes. The latter is shown to result from a reaction of CuMes with surface hydrides within the pores. As a result, the internal surface of the pores was covered with dense and small Cu islands (about 10 nm in diameter). The resulting composite material (porous Si + Cu) could be used to fabricate highly integrated and efficient columns for gas separation.
Keywords:
Industry; Nanomaterials;References:
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