quasi - one dimensional metal oxide semiconductors
quasi - one dimensional metal oxide semiconductors
... nano-optoelectronic devices. 6. Applications of metal oxide nanostructures 6.1. Metal oxide gas sensors Metal oxides semiconductors are normally high gap metal oxides in which the semiconducting behavior ... 21 4. Doping of quasi 1D metal oxide nanostructures . . . 22 5. Preparation of quasi 1D metal oxide heterostructures . . . . . . . . . . . . . . . . . 24 6. Appl...
Ngày tải lên: 20/03/2014, 13:06
quasi - one - dimensional metal oxide materials — synthesis, properties and applications
... based on metal oxide Q1D systems, and the current progress in device development will be highlighted. # 2006 Elsevier B.V. All rights reserved. Keywords: Metal oxide semiconductor; Quasi- one- dimensional ... on metal oxide nanowires, such as zinc oxide (ZnO), tin oxide (SnO 2 ), indium oxide (In 2 O 3 ) aluminum oxide (Al 2 O 3 ), gallium oxide (Ga 2 O 3 ), tungsten...
Ngày tải lên: 20/03/2014, 13:06
chemical sensing and catalysis by one - dimensional metal - oxide nanostructures
... of quasi- one- dimensional metal- oxide nanostructures already reported (see reviews 16, 17). (A) nanowires and nanorods; (B) core-shell structures with metallic inner core, semiconductor, or metal- oxide; ... deposi- tion, a high-surface-area surface consisting of feather-like MgO filaments could be grown (85). CONCLUDING REMARKS This review is a status report. Progress in the synthe...
Ngày tải lên: 19/03/2014, 16:47
A structural model of one dimensional thin silica nanowires
... the tip than the edge-sharing two-membered ring molecular chain proposed early. The SU-2MR molecular chain would be considered as an appropriate structural model of one- dimensional thin (0.4 ... three-dimen- sional (3D) network of corner-sharing SiO 4 tetrahedra, frequently six-membered rings (refer to an Si–O–Si– OÁÁÁ ring containing six Si atoms). However, the smaller four-, three-, ......
Ngày tải lên: 16/03/2014, 15:03
Semiconductor nanowires for novel one dimensional devices
... Tel.: +4 6-4 6-2 2 2-7 679; fax: +4 6-4 6-2 2 2-3 637. E-mail address: lars.samuelson@ftf.lth.se (L. Samuelson). features which are then transferred to the QW via an anisotropic etch. Another well-known ... they were grown and trans- ferred to a SiO 2 -terminated silicon wafer. Ohmic con- tacts are formed to the nanowire via electron-beam lithography, metal evaporation and lift-...
Ngày tải lên: 16/03/2014, 15:20
One dimensional organic nanostructures a novel approach based on the selective adsorption of organic molecules on silicon nanowires
... molecules, i.e., tris{2,5-bis(3,5-bis-trifluoro- methyl-phenyhl)-thieno}[3,4-b,h,n ]-1 ,4,5,8,9,12-hexaazatriphenyl- ene (THAP) and 9,10-phenanthrenequinone (PQ). The results are a non-selective adsorption ... to a well-defined one- dimensional aggregation and changes the metallic character of the nanowires to a semi-conducting one. Ó 2008 Elsevier B.V. All rights reserved. One- dimens...
Ngày tải lên: 16/03/2014, 15:35
conduction model of metal oxide gas sensors
... work presented here is one step towards a general applicable model for real world gas sensors. Keywords: metal oxide, gas sensors, conduction model 1. Introduction Metal oxides in general and ... scientists interested in gas sensing under atmospheric condi- tions. SnO 2 sensors are the best-understood prototype of oxide- based gas sensors. Nevertheless, highly spe- cific and sensitive...
Ngày tải lên: 19/03/2014, 16:47
ethanol interference in light alkane sensing by metal-oxide solid solutions
... xxx Keywords: Metal- oxide chemoresistive sensors Light alkane detection Ethanol interference Active carbon filtre abstract A study of the sensing properties of chemoresistive metal- oxides vs. light ... with the num- ber of carbon atoms, and with temperature [5,6]. This behaviour is explained through alkane oxidation via heterogeneous catalysis of metal- oxide materials [12–14]. Very h...
Ngày tải lên: 19/03/2014, 16:48
hybrid metal oxide and multiwall carbon nanotube films for low temperature gas sensing
... the metal oxide matrix. Since SnO 2 or WO 3 films behave as n-type semiconductors and oxygen-functionalized MWCNTs films behave as p-type semiconductors [19], the hetero-structure n-SnO 2 /p-MWCNTs (n-WO 3 /p-MWCNTs) ... on the development of two depletion layers, one at the surface of metal oxide grains and another at the interface of the n -metal oxide/ p-MWCNT hetero-structur...
Ngày tải lên: 19/03/2014, 16:48
hydrothermal synthesis and crystal structure of a novel one - dimensional tritungstate
... which receive contributions from 1-, 2- and 4-coordinated oxo groups. Each W O 4y unit consists of a 620 pair of center-of-symmetry-related W O trimers of 310 edge-sharing WO octahedra as shown ... the one- dimensional chains adopted by the anions Ž.Ž .wxŽ.Ž .wxwxŽ. in: a C H N W O 1; b C H N Mo O 15 ; and c an 2102 310 2102 310 wxwx open framework solid K W O 16 . 2310 Ž X . clinic...
Ngày tải lên: 19/03/2014, 16:48