Silica gel fabrication of [60]fullerene aggregates and carbon nanotubes utilizing the amphiphilic nature of poly(N-vinylpyrrolidone) as a ‘glue’
- 18 July 2003
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 13 (9) , 2145-2149
- https://doi.org/10.1039/b305314h
Abstract
Sol–gel polycondensation of tetraethoxysilane in the presence of [60]fullerene/poly(N-vinylpyrrolidone) (PVP) composite or single-walled carbon nanotubes (SWNTs)/PVP composite yielded novel silica nanoparticles or silica nanorods, respectively. TEM and SEM observations and IR, UV-VIS and XPS spectroscopic analyses consistently revealed that these novel silica-based superstructures are composed of templates ([60]fullerene or SWNTs), PVP and a thin silica layer. From the silica nanoparticles it was possible to prepare the hollow silica particles by pyrolysis. In the silica nanorods, it was possible to remove PVP and then SWNTs at 500 and 1000 °C, respectively, by stepwise pyrolysis. TEM and SEM images of the silica nanrods obtained after removal of PVP showed a hollow structure with SWNTs sticking out of the inner tube, like the lead of an ‘automatic pencil’.Keywords
This publication has 42 references indexed in Scilit:
- Silica Gel Fabrication of [60]Fullerene Aggregates Utilizing Poly(N-vinylpyrrolidone) as a “Glue”Chemistry Letters, 2003
- Photochemistry of single wall carbon nanotubes embedded in a mesoporous silica matrixChemical Communications, 2002
- Double helical silica fibrils by sol–gel transcription of chiral aggregates of gemini surfactantsElectronic supplementary information (ESI) available: Fig. S1: TEM image of double stranded silica obtained by sol–gel transcription of l-1/d-1 gel (2∶1 mol/mol, 33% ee l-1 excess). See http://www.rsc.org/suppdata/cc/b2/b202799m/Chemical Communications, 2002
- Polymer hybrids of functionalized silsesquioxanes and organic polymers utilizing the sol–gel reaction of tetramethoxysilanePolymer, 2002
- Aqueous Solution-Based Ceramic Thin Film Deposition Using Organic Polymers with Amide GroupsChemistry Letters, 2001
- Ring Closure of Carbon NanotubesScience, 2001
- Chirally-Ordered Fullerene Assemblies Found in Organic Gel Systems of Cholesterol-Appended [60]FullerenesChemistry Letters, 2000
- Unexpected Discovery of a Novel Organic Gel System Comprised of [60]Fullerene-containing AmphiphilesChemistry Letters, 1999
- Solubility and Micellization Behavior of C60 Fullerenes with Two Well-Defined Polymer ArmsMacromolecules, 1998
- Effect of [60] Fullerene on the Chondrogenesis in Mouse Embryonic Limb Bud Cell Culture SystemFullerene Science and Technology, 1996