Catalyst engineering for growth of one dimensional nanostructures

... the VLS nanowire growth as it determines the location and diameter of the nanostructures The most adopted method for the preparation of the metal catalyst for the VLS growth of ~ 11 ~ Chapter ... desorption of Au atoms The Au nanoparticles were used as catalysts for the growth of silicon nanowires via the Vapor-Liquid-Solid (VLS) mechanism The nanowires are of vi u...

Ngày tải lên: 11/09/2015, 09:18

... Fig (a) Stripes with a periodicity of 1.26 nm are clearly visible in STM images of the h-BN phase (The image was taken with a bias voltage of VB = 1.8 V and a set tunneling current of IT = nA.) ... we report the discovery of a tunable system of two self-assembling nanostructures The structures are very appealing because of their 1D characters and their directional orthogon...

Ngày tải lên: 22/06/2014, 22:20

... 33 2.2 Synthesis of 1D nanostructures using AAO as template 34 Chapter iii Table of contents 2.2.1 Synthesis of PPV 1D nanostructures …………… 35 2.2.2 Electrodeposition of polypyrrole and metallic ... amorphous) Chapter 1.1.1 Single-component NWs and NTs Single-component 1D nanostructures are simply NWs and NTs that consist of one type of material The application...

Ngày tải lên: 10/09/2015, 09:29

... obtained for II–V group semiconductors 785 Device Applications of 1-D II–V Semiconducting Nanostructures As an important group of narrow band gap semiconductors, 1-D II–V semiconducting nanostructures ... semiconducting nanostructures, we were also able to get other kinds of interesting 1-D II–V semiconducting nanostructures For instance, Fig 7a and b show the SEM...

Ngày tải lên: 21/06/2014, 20:20

... recently The results of these additional studies will be presented elsewhere Tensile Behavior of As-Synthesized TiO2 1D Nanostructures Nanoscale tensile loading [20–22] of individual TiO2 1D nanostructures ... introduction of sccm O2 into the reaction chamber suppressed the growth of TiO2 nanostructures, but enhanced the formation of polycrystalline TiO2 film Similar...

Ngày tải lên: 22/06/2014, 00:20

... areas of modern mathematics In this thesis, We will focus on the one dimensional Navier- Stokes equations and consider the initial- boundary value problem There are a lot of works on the initial value ... estimate of the Green’s function G(x, y, t) for the initial- boundary value problem to the linearized Navier- Stokes equations (1.5) We reca...

Ngày tải lên: 09/09/2015, 10:15

... chains It is proposed to be a more appropriate growth model of 1D silica nanowires because of their higher energetic and thermal stabilities and chemical reactivity than those of ES-2MR chains ... smaller gaps of SU-2MR chains indicate higher chemical reactivities, facilitating the continuous growth of the chains Hence, the SU-2MR chain may be a more reasonable growth mod...

Ngày tải lên: 16/03/2014, 15:03

... Conclusion Silicon-based nanostructures with different colors, morphologies, and microstructures were formed over a wide temperature range from 890 to 1320 °C by thermal evaporation of SiO powders ... decomposition of SiO described by 2SiO ) Si + SiO2 After the Si nucleus is formed, it will grow into a larger particle by continuously adsorbing SiO from the vapor ph...

Ngày tải lên: 16/03/2014, 15:30

... the SnO2 nanorods Fig The XRD pattern of the SnO2 nanorods grown via the hydrothermal method room temperature on a Horiba Jobin Yvon LabRam IR system at a spatial resolution of mm Raman scattering ... consist of nanorods as well as nanoparticles The diameters of SnO2 nanorods are in the range of 100–150 nm with lengths of the order of 1–2 mm The end planes...

Ngày tải lên: 20/03/2014, 13:08

... Dnag2-I and Dnag2-II are Dnag2 strains C2332 and A523, and nag1Dnag2-I and nag1Dnag2-II are Dnag1Dnag2 strains 713 and 1921, respectively Chitin degradation in Trichoderma atroviride NAG1 and NAG2 are ... T atroviride under the tested conditions Our data show that the presence of either of these enzymes is essential and sufficient for degradation of...

Ngày tải lên: 23/03/2014, 05:22

... Nonetheless, the present study identifies the significance of the RecDassociated ATPase activity required during the growth of P syringae at low temperature (4 °C) The very low (but non-zero) ATPase ... knowledge regarding low- temperature- adapted biology We previously discovered that recD is essential for growth of the Antarctic bacterium Pse...

Ngày tải lên: 30/03/2014, 04:20

... control the oxide layer thickness and we have shown Figure Regrowth of oxide on a 200°C hotplate (A) Length and width of NWs as a function of regrowth time for the oxide layer (B) Percentage of ... be put on the oxide layer thickness and that the substrate preparation is important for self-assisted growth of InAs NWs It is found that the growth...

Ngày tải lên: 21/06/2014, 00:20

... and Weibull fading models We also consider the combined effect of lognormal shadow fading and small-scale fading models 1) Rayleigh fading: Assume that the received signal amplitude in V2V channel ... Jones, Connectivity analysis of wireless ad hoc networks with beamforming IEEE Trans Veh Technol 58(9), 5247–5257 (2009) [12] X Zhou, S Durrani, H Jones, Connectivity o...

Ngày tải lên: 21/06/2014, 17:20

... observation Optical Properties and Photocatalytic Activity of 1D CdS@ZnS Core-Shell Nanocomposites The optical properties of 1D CdS@ZnS core-shell nanocomposites were measured using UV-vis absorption and ... spectrophotometer and WGY-10 spectrofluorimeter Photocatalytic Decomposition of MB and 4CP To evaluate the photocatalytic activity of the synthesized...

Ngày tải lên: 22/06/2014, 01:20

... accurate estimates of covariance function for both direct and maternal genetic effects This study presented a first attempt at estimating covariance functions for maternal effects on early growth of beef ... 400) and BIC (−83 000) were −56.3 and 91.1 for k = 5263, −147.9 and 215.6 for k = 5253, −213.8 and 298.6 for k = 4253, −268.4 and 359.0 for k...

Ngày tải lên: 09/08/2014, 18:21