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Yu, Seung-Ho,Pucci, Andrea,Herntrich, Tobias,Willinger, Marc-Georg,Baek, Seung-Hwan,Sung, Yung-Eun,Pinna, Nicola Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.3
<P>A one-pot template-free solvothermal synthesis of crystalline Li<SUB>4</SUB>Ti<SUB>5</SUB>O<SUB>12</SUB> nanostructures based on the “benzyl alcohol route” is introduced. The 1–2 µm sized nanostructured spherical particles are constituted of nanocrystallites in the size range of a few nm. This is the first report showing that crystalline Li<SUB>4</SUB>Ti<SUB>5</SUB>O<SUB>12</SUB> can be directly obtained by soft chemistry solution routes. The as-synthesized crystalline nanostructures show good lithium intercalation/deintercalation performances at high rates (up to 30 C) and good cycling stabilities. Annealing the nanostructures at 750 °C improves the performance, which approaches the theoretical capacity of Li<SUB>4</SUB>Ti<SUB>5</SUB>O<SUB>12</SUB> with no noticeable (less than 5%) capacity loss after 200 cycles.</P> <P>Graphic Abstract</P><P>A one-pot template-free solvothermal synthesis of crystalline Li<SUB>4</SUB>Ti<SUB>5</SUB>O<SUB>12</SUB> nanostructures showing high lithium intercalation/deintercalation performances is introduced. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0jm03064c'> </P>
Willinger, Marc-Georg,Neri, Giovanni,Bonavita, Anna,Micali, Giuseppe,Rauwel, Erwan,Herntrich, Tobias,Pinna, Nicola Royal Society of Chemistry 2009 Physical chemistry chemical physics Vol.11 No.19
<P>A new atomic layer deposition (ALD) process was applied for the uniform coating of carbon nanotubes with a number of transition-metal oxide thin films (vanadium, titanium, and hafnium oxide). The presented approach is adapted from non-aqueous sol–gel chemistry and utilizes metal alkoxides and carboxylic acids as precursors. It allows the coating of the inner and outer surface of the tubes with a highly conformal film of controllable thickness and hence, the production of high surface area hybrid materials. The morphology and the chemical composition as well as the high purity of the films are evidenced through a combination of electron microscopic and electron-energy-loss spectrometric techniques. Furthermore, in order to highlight a possible application of the obtained hybrids, the electrical and sensing properties of resistive gas sensors based on hybrid vanadium oxide-coated carbon nanotubes (V<SUB>2</SUB>O<SUB>4</SUB>–CNTs) are reported and the effect of thermal treatment on the gas sensing properties is studied.</P> <P>Graphic Abstract</P><P>The controlled deposition of high quality thin metal oxide films onto the surface of CNTs is achieved through a new approach to ALD. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b821555c'> </P>