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'.
| Original language | English |
|---|---|
| Pages (from-to) | 2145-2149 |
| Number of pages | 5 |
| Journal | Journal of Materials Chemistry |
| Volume | 13 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sep 1 2003 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Chemistry
Cite this
Silica gel fabrication of [60]fullerene aggregates and carbon nanotubes utilizing the amphiphilic nature of poly(N-vinylpyrrolidone) as a 'glue'. / Asai, Masayoshi; Fujita, Norifumi; Sano, Masahito; Shinkai, Seiji.
In: Journal of Materials Chemistry, Vol. 13, No. 9, 01.09.2003, p. 2145-2149.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Silica gel fabrication of [60]fullerene aggregates and carbon nanotubes utilizing the amphiphilic nature of poly(N-vinylpyrrolidone) as a 'glue'
AU - Asai, Masayoshi
AU - Fujita, Norifumi
AU - Sano, Masahito
AU - Shinkai, Seiji
PY - 2003/9/1
Y1 - 2003/9/1
N2 - 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'.
AB - 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'.
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U2 - 10.1039/b305314h
DO - 10.1039/b305314h
M3 - Article
AN - SCOPUS:0042762948
VL - 13
SP - 2145
EP - 2149
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
SN - 0959-9428
IS - 9
ER -