Thermal transport properties of individual nanowires

... thesis aims to study thermal transport in various kinds of nanowires (NWs) to elucidate phonon transport in quasi one-dimensional nanostructures The thermal transport properties of zinc oxide (ZnO), ... dependence of various physical properties on size and dimensionality Among the physical properties of interest, relatively less research has been carried out on the...

Ngày tải lên: 09/09/2015, 18:57

... the potential of this oxide superlattice approach IV CONCLUSIONS Cross- plane transport in LSMO/LMO superlattices has been presented as a potential route to a p- type thermoelectric material Epitaxial ... see http://jap.aip.org/about/rights _and_ permissions 063714-6 Jha et al J Appl Phys 112, 063714 (2012) FIG (a) Measured in -plane resistivity and (b) extracted cross- pla...

Ngày tải lên: 06/05/2014, 08:53

... scanned over the silicon surface at speed of 0.1– m=s leads to an 0.2–2 nm-thick oxide pattern of width 20 –60 nm The oxide features formed by AFM lithography can be then transferred to the silicon ... supported on an insulating layer (Fig 1) As-doped Unibond J silicon- on-insulator (SOI) samples with an ultra-thin single- crystal silicon top layer (typically 15 –20 nm) we...

Ngày tải lên: 16/03/2014, 15:15

... context, Bogdan et al [7] and Walter Hofstetter et al [8] studied the combination of the Kondo effect and the Fano effect How the intradot Coulomb interaction influences the phase coherence of ... Coulomb interactions, are in phase [1-3] and the intradot Coulomb interaction can induce dephasing under an appropriate condition We can express the Hamiltonian for the present s...

Ngày tải lên: 05/03/2014, 14:20

... NanoLetters (2004) 433 [8] [9] [10 ] [11 ] [12 ] [13 ] [14 ] [15 ] [16 ] [17 ] [18 ] [19 ] [ 20] [ 21] [22] [23] [24] [25] 3037 J Kikkawa, Y Ohno, S Takeda, Appl Phys Lett 86 (2005) 12 310 9 X Zhao, C.M Wei, L Yang, ... proposed in Si NWs along the [0 1] direction [24] Since both p-bonded chain and p(2 Â 1) reconstructions on Si( 1 1) and Si(...

Ngày tải lên: 16/03/2014, 15:37

... Conclusion We have investigated the ammonia sensing properties of W18 O49 nanowires prepared by a low temperature solvothermal technique The electrical resistance of W18 O49 nanowires is increased when ... behavior of the W18 O49 nanowires to ammonia is related with the ultra-thin diameter (less than nm) The high sensitivity of the W18 O49 nanowires in the detection...

Ngày tải lên: 20/03/2014, 13:07

... J/cm2, and the shot area on the target surface was 0.042 cm2 Before the deposition, there should be pre-deposition process for The deposition process continued for 30 The structural and (a) (b) optical ... http://www.nanoscalereslett.com/content/6/1/552 (a) Au catalyst Page of (c) EDS (b) (103) ZnO NW nm Figure TEM images of 3SZO NW (a) The location and the size...

Ngày tải lên: 20/06/2014, 22:20

... line is a guide to the eye The position of SO phonon down shifts with the decrease in diameter; (b) Dependence of the position of the SO phonon from the diameter of the NWs The points represent ... broadening of the phonon peaks As shown in Figure 2, beside LO and TO phonon peaks, there is another phonon peak centered around 230.0 cm-1, which can be att...

Ngày tải lên: 21/06/2014, 01:20

... STEADY- STATE TRANSPORT PROPERTIES OF ANHARMONIC SYSTEMS JUZAR THINGNA M Sc., University of Pune, India A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF PHYSICS ... either in the anharmonicity or the coupling strength and is best suited only to study transient transport Exact treatment of anharmonic systems has been one of the holy grails...

Ngày tải lên: 08/09/2015, 19:35

... role in determining the microstructure, magnetic and transport properties of the magnetic oxide thin films (2) A whole picture of the structure and magnetic properties of half metallic magnetite ... Figure 1 The density of state of non -magnetic, ferromagnetic, and half metallic meterials Most of the half metallic materials are ferromagnetic oxides, such as...

Ngày tải lên: 09/09/2015, 10:15

... nanoribbons ZTG zero transmission gap Chapter Introduction 1.1 The bottleneck of silicon -based electronics Modern electronics relies on the capabilities of semiconductor components to control electron ... carbon chain has (a) sp connection with carbon chain leads; (b) sp2 connection with carbon ribbon leads (optimized); (c) sp3 connection with capped carbon nanotube leads; (d) sp3 con...

Ngày tải lên: 09/09/2015, 18:48

... the fracture surfaces of neat epoxy and the nanocomposites In addition, the hydrothermal effects on the thermal/ mechanical properties of the highly exfoliated epoxy- clay nanocomposites were also ... relationships between the morphology and properties of nanocomposites were studied In addition, hydrothermal effect on the thermal/ mechanical properties of fully ex...

Ngày tải lên: 16/09/2015, 08:31

... 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