A simple large scale synthesis of very long aligned silica nanowires

... the large- scale synthesis of very long aligned silica nanowires. The SiO 2 nanowires were highly pure (no metal catal- ysis contamination), ultralong (millimeters). Most of wires had uniform diameters ... based on the thermal oxidation of Si wafers has been discovered to provide a large- scale synthesis of very long, aligned silica nanowires. The as-gro...

Ngày tải lên: 16/03/2014, 15:03

... have been synthesised in gram quantitiesby a low temperature hydrothermal route using citric acid as a structural modifier and hexadecylamine as a templating agent. The ratio of [A] /[W] play an ... micrograph of a typical MWNT (c) along with its SAED pattern (d). The chiral angle of the nanotubes could be calculated as ∼ 10 ◦ based on the SAED. mixture of longer rods of vari...

Ngày tải lên: 19/03/2014, 16:48

... nanocrystals Zhanjun Gu a, b , Huiqiao Li c , Tianyou Zhai a , Wensheng Yang d , Yongyao Xia c , Ying Ma a, Ã , Jiannian Yao a, Ã a Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular (BNLMS), ... final products, and dried at 60 1C. X-ray diffraction (XRD) analysis was performed using a Japan Rigaku D/max-2500 diffractometer with CuKa radiation (l ¼ 1.5418 A...

Ngày tải lên: 20/03/2014, 13:04

... observe the large- scale of SnO 2 NWs on the substrates. 2.2. Gas-sensor fabrication and testing Fig. 2 shows a schematic diagram of gas sensor fabrication. A patterned Au catalyst layer was deposited ... image of SnO 2 nanowires with Au catalyst cap on the substrates from up-stream (i) and down-stream (l); EDX spectrum measured at the catalyst cap of the up-stream sample (k)...

Ngày tải lên: 19/03/2014, 16:48

... Large- scale synthesis, characterization and photoluminescence properties of amorphous silica nanowires by thermal evaporation of silicon monoxide Sanjay K. Srivastava a, Ã , P.K. Singh a , ... Sood a , D. Haranath a , Vikram Kumar a a National Physical Laboratory, Dr. K. S. Krishnan Marg, Pusa, New Delhi 110012, India b Department of Physics, Indian Institute of Tec...

Ngày tải lên: 16/03/2014, 15:18

... (Korhonen et al., 2006) for a sample entry. 915 3.2 Gold Standard Our gold standard was based on a manual analysis of some of the test corpus data, supplemented with additional frames from the ANLT, ... first systems capable of automatically learn- ing a small number of verbal subcategorization frames (SCFs) from unannotated English corpora emerged over a decade ago (Brent, 199...

Ngày tải lên: 17/03/2014, 04:20

... is often a great disadvantage to their application. As a template-free and catalyst-free method, epitaxial growth of free-standing nanorod arrays has recently been attained, in which a substrate ... 2009 Keywords: Tungsten oxide Nanorod arrays Hydrothermal synthesis Gas sensing Sensor abstract Large- scale vertically aligned and double-sided Co-doped hexagonal tungsten oxide na...

Ngày tải lên: 20/03/2014, 13:04

... Simple and Rapid Synthesis of α -Fe 2 O 3 Nanowires Under Ambient Conditions Albert G. Nasibulin 1 （ ） , Simas Rackauskas 1 , Hua Jiang 1 , Ying Tian 1 , Prasantha Reddy Mudimela 1 , ... Srivastava, H.; Tiwari, P.; Srivastava, A. K; Nandedkar, R. V. Growth and characterization of alpha-Fe 2 O 3 nanowires. J. Appl. Phys. 2007, 102, 054303. [14] Dong, W. T.; Zhu, C. S. Use...

Ngày tải lên: 20/03/2014, 13:07

... Dependency Relations Jun’ichi Kazama Japan Advanced Institute of Science and Technology (JAIST), Asahidai 1-1, Nomi, Ishikawa, 923-1292 Japan kazama@jaist.ac.jp Kentaro Torisawa National Institute of Information ... character itself ct character type: uppercase alphabet, lower- case alphabet, katakana, hiragana, Chinese characters, numbers, numbers in Chinese characters, and spaces m mo b...

Ngày tải lên: 20/02/2014, 09:20

... role of semantics in the development of large- scale grammars of natural language Valia Kordoni Department of Computational Linguistics University of Saarland PO Box 15 11 50, D - 66041 Saarbriicken, ... Germany kordoni@coli.uni—sb.de Abstract The aim of this paper is to show how large- scale (computational) gram- mars of natural language benefit from an organization of...

Ngày tải lên: 17/03/2014, 22:20