Characterization of mechanical properties of tungsten nanowires

... Young’s modulus of two different nanowires 72 vi List of Figures List of Figures Fig 1.2.1 High-resolution TEM image of tungsten nanowire [Tay et al., 2004] Fig 1.2.2 TEM image of tungsten nanowire ... LIST OF TABLES vi LIST OF FIGURES vii LIST OF ABBREVIATIONS xi CHAPTER – INTRODUCTION 1.1 Properties of materials at nanoscales 1.2 Motivation 1.3 Objectives of the...

Ngày tải lên: 03/10/2015, 20:32

... characteristics of the fabricated SiNWs solar cell under dark and light conditions the thickness of Si base substrate more thinly For improvement of conversion efficiency of the SiNWs solar cells, the ... performance Therefore, further reduction of the reflectance will be expected from the optimization of the synthesis conditions of SiNWs For analysis of the electri...

Ngày tải lên: 16/03/2014, 15:12

... the electrical and gas sensing behavior of ZnO nanowires Fig Characteristics of In3 O2 nanowires: (a) SEM image of In3 O2 nanowires, (b) TEM image of nanowire 70 nm in width, and (c) ED pattern ... image of a nanowire, and (e) linescan of the HAADF signal (solid line) and numerical fit of the shape of the nanowire (dashed line) As both composition and phase ca...

Ngày tải lên: 16/03/2014, 15:25

... Synthesis and characterization of CuO nanowires by a simple wet chemical method Anita Sagadevan Ethiraj1 and Dae Joon Kang*1 BK21 Physics Research Division, Department of Energy Science, ... djkang@skku.edu Abstract We report a successful synthesis of copper oxide nanowires with an average diameter of 90 nm and lengths of several micrometers by using...

Ngày tải lên: 20/06/2014, 21:20

... Synthesis and characterization of CuO nanowires by a simple wet chemical method Anita Sagadevan Ethiraj1 and Dae Joon Kang*1 BK21 Physics Research Division, Department of Energy Science, ... djkang@skku.edu Abstract We report a successful synthesis of copper oxide nanowires with an average diameter of 90 nm and lengths of several micrometers by using...

Ngày tải lên: 21/06/2014, 17:20

... Figure 3.3: Schematic of field emission induced growth for synthesis of tungsten nanowires Figure 3.4: 29 Schematic of set-up used for selective growth of nanowires by field emission Figure 3.6: ... procedures for the growth of tungsten nanowires in tungsten carbonyl ambient through a field- emission induced growth (FEIG) method Using this method, site3 spe...

Ngày tải lên: 11/09/2015, 10:18

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Ngày tải lên: 13/10/2015, 15:57

... 3/ (#CpD), $ = L2/(%2&) and & = k/(#Cp) Equation (3. 3) should be satisfied for the thermal conductivity calculated to be within +/ -3. 5% of the actual value < 2'$ < (3. 3) The parameters of the lock-in ... working frequency for the Ge nanowire sample was 1000 Hz, 0. 03 s of time constant was sufficient for stability 3. 11 Ceramic heater setup for temperature dependence c...

Ngày tải lên: 13/10/2015, 15:57

... roughness of the nanowires and act as a form of phonon-scattering elements at several length scales If precipitates are incorporated carefully, the k of Ge Thermal Conductivity of GeNw and SiNw 77 nanowires ... resistivity of the GeNw were measured and extracted accordingly as below Electrode to 2, to and to : 0. 349 ! m Electrode to and to : 0 .41 3 ! m Electrode to :...

Ngày tải lên: 13/10/2015, 15:57

... of germanium nanowires 11 " 2. 3 .1" Growth mechanism of germanium nanowires 11 " iv 2. 3 .2 Different nanowire synthesis techniques 18 " 2. 4 Fabrication of silicon nanowires by ... Introduction and Motivation 1" 1. 1" Background 1" 1. 2" Efficiency of a thermoelectric material 3" 1. 3" Opportunity in semiconductor nanowires 4" 1. 4" Organization of ....

Ngày tải lên: 13/10/2015, 15:57

... single step process using thermal evaporation of silicon monoxide under argon atmosphere with traces of oxygen The nanowires were free from metal contaminations and showed blue photoluminescence at ... its simplicity and the low cost Conclusions Amorphous silicon dioxide nanowires of several hundred microns in length and tens of nanometers in diameter have been...

Ngày tải lên: 16/03/2014, 15:18

... distribution of the strain around the interface somehow correlates with the composition of the core–shell nanowire These aspects are reflected in the averaged bond lengths of Si Si, Ge Ge and Si Ge varying ... Composition 0.8 1.0 0.4 0.6 Composition 0.8 1.0 2.50 Si Si Ge Ge Ge Si Bond length (Ang) 2.45 2.40 2.35 3047 composition in Si- core /Ge- shell nano...

Ngày tải lên: 16/03/2014, 15:22

... varying NO2 concentration at an operating temperature of 200 ◦ C Please cite this article in press as: Y Qin, et al., Microstructure characterization and NO2 -sensing properties of tungsten oxide ... nanowires, mixture and nanosheets after annealing Please cite this article in press as: Y Qin, et al., Microstructure characterization and NO2 -sensing properties...

Ngày tải lên: 20/03/2014, 13:04

... MECHANICAL CHARACTERIZATION OF BIOPOLYMER AND THE EFFECTS OF MECHANICAL PROPERTIES OF EXTRACELLULAR MATRIX ON CELL BEHAVIORS WONG LONG HUI (B.Eng.(Hons.), NTU) A THESIS SUBMITTED FOR THE ... in cell and extracellular matrix interactions The first part of the thesis involved the use of conventional macrorheological technique to uncover the ri...

Ngày tải lên: 09/09/2015, 11:28

... micro- fabricated cantilevers were used to investigate the stresses and density changes upon crystallization in amorphous thin films Two classes of materials with distinct properties and significant ... of Young’s modulus and coefficients of thermal expansion of amorphous Cu-Zr thin films - 162 7.1 Measurement of Young’s modulus of amorphous Cu-Zr...

Ngày tải lên: 11/09/2015, 09:16