Oxide nanotubes prepared using carbon nanotubes as templates

Abstract

Hollow nanotubes of SiO 2 , Al 2 O 3 , V 2 O 5 , and MoO 3 have been prepared using carbon nanotubes as templates. The procedure involves coating the carbon nanotubes with tetraethylorthosilicate, aluminum isopropoxide, or vanadium pentoxide gel, followed by calcination and heating at higher temperatures in air to oxidize the carbon. SiO 2 nanotubes containing transition metal ions have been prepared by this procedure since such materials may be of use in catalysis.

Advanced syntheses and microfabrications of conjugated polymers, C60-containing polymers and carbon nanotubes for optoelectronic applications

“…As a consequence, it is now possible to perform the size-limited crystallization at atomic scale [871] 3 have been prepared by coating carbon nanotubes (as templates) with tetraethylorthosilicate, aluminum tisopropoxide, vanadium pentoxide gel, or molybdenum (VI) oxide, followed by calcination and heating at high temperatures (ca. 700±1000 K) in air to oxidize the carbon [878]. Starting with the metaloxide encapsulated carbon nanotubes, this procedure has also led to the formation of SiO 2 nanotubes filled by transition metal ions which should be of use as catalysts.…”

Hydrothermal synthesis of alumina nanotubes templated by anionic surfactant

“…Based on uniquely electronic, mechanical and chemical properties of carbon nanotubes with marked shape-specific and quantum size effects [1][2][3], nanotubular materials are expected to exhibit both unusual characteristics and potential applications [4]. During the last decade, various nanotubes have been prepared, inclusive of Bi [5], TiO 2 [6], SiO 2 [7], Al 2 O 3 [8], MX 2 (M¨Mo, W, Nb, Ta; X¨S, Se) [9,10], VO x [11,12], NiCl 2 [13], H 2 Ti 3 O 7 [14], AlN [15], rare earth (Er, Tm, Yb, Lu) oxides [16] and so on. Most recently, considerable efforts have been directed towards the preparation of nano-structured alumina, due to their novel properties, such as high elastic modulus, thermal and chemical stability, and optical characteristics [14].…”

Measuring the Work Function at a Nanobelt Tip and at a Nanoparticle Surface

“…[1][2][3][4][5][6][7][8][9] Among those oxides, zinc oxide (ZnO) is a semiconductor with a wide band gap of 3.37 eV and a large exciton binding energy of 60 meV, which is suitable for short-wavelength optoelectronic devices at room temperature. ZnO nanobelts and nanowire have shown interesting electronic, chemical, photoluminescence, and lasing properties.…”