Self Assembly and Properties of C:WO3 Nano-Platelets and C:VO2/V2O5 Triangular Capsules Produced by Laser Solution Photolysis

被引：49

作者：

Mwakikunga, B. W. ^{[1
,2
,3
,4
]}

Forbes, A. ^{[1
,6
]}

Sideras-Haddad, E. ^{[2
,3
,5
,7
]}

Scriba, M.

Manikandan, E. ^{[7
]}

机构：

[1] CSIR, Natl Laser Ctr, ZA-0001 Pretoria, South Africa

[2] Univ Witwatersrand, DST NRF, Ctr Excellence Strong Mat, Johannesburg, South Africa

[3] Univ Witwatersrand, Sch Phys, Johannesburg, South Africa

[4] Univ Malawi Polytech, Dept Phys, Blantyre 3, Malawi

[5] iThemba LABS, Johannesburg, South Africa

[6] Univ Kwazulu Natal, Sch Phys, ZA-4000 Durban, South Africa

[7] DST CSIR Natl Ctr Nanostruct Mat, Pretoria, South Africa

来源：

NANOSCALE RESEARCH LETTERS | 2010年 / 5卷 / 02期

关键词：

Carbon; VO2; V2O5; WO3; Laser; Photolysis; Sensors; CHEMICAL-VAPOR-DEPOSITION; FE-PT ALLOY; VANADIUM DIOXIDE; HYDROTHERMAL SYNTHESIS; RAMAN-SPECTROSCOPY; OXIDE NANORODS; V2O5; ION; NANOCOMPOSITE; PYROLYSIS;

D O I：

10.1007/s11671-009-9494-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Laser photolysis of WCl6 in ethanol and a specific mixture of V2O5 and VCl3 in ethanol lead to carbon modified vanadium and tungsten oxides with interesting properties. The presence of graphene's aromatic rings (from the vibrational frequency of 1,600 cm(-1)) together with C-C bonding of carbon (from the Raman shift of 1,124 cm(-1)) present unique optical, vibrational, electronic and structural properties of the intended tungsten trioxide and vanadium dioxide materials. The morphology of these samples shows nano-platelets in WO (x) samples and, in VO (x) samples, encapsulated spherical quantum dots in conjunction with fullerenes of VO (x) . Conductivity studies revealed that the VO2/V2O5 nanostructures are more sensitive to Cl than to the presence of ethanol, whereas the C:WO3 nano-platelets are more sensitive to ethanol than atomic C.

引用

页码：389 / 397

页数：9

共 41 条

[1] High contrast optical switching in vanadium dioxide thin films [J].