Thermal conductance of pristine amorphous silicon nanowires a non equilibrium greens function approach
Growth of amorphous silicon nanowires via a solid–liquid–solid mechanism
... Cross-sectional SEM analysis of the sample provided direct evidence to support a- SiNW growth via an SLS mechanism Fig 3a shows a low-magnification cross-sectional SEM image It is visible that a layer of a- SiNWs ... a large area Ž10 = 10 mm of 111 Si substrate after a h period of growth EDS analysis Žinset proved that the nanowires consist mainly of silicon...
Ngày tải lên: 16/03/2014, 15:05
Growth of amorphous silicon nanowires
... growth and tail ends of the nanowires In this Letter, we use chemical vapor deposition of silane to prepare silicon nanowires Our research group had previously reported the growth amorphous silicon ... amounts of nanowires are formed, which are of a uniform length up to micrometers The growth rate of the nanowires is estimated to be ca 15 nm/min The diameter of...
Ngày tải lên: 16/03/2014, 15:05
Morphology and growth mechanism study of self assembled silicon nanowires synthesized by thermal evaporation
... [10±13] and thermal evaporation [14±17] are two methods normally used for the synthesis of SiNWs The key point in these two methods is the formation of a sucient amount of silicon atoms and/ or silicon ... made of a Si core and a SiO2 sheath The one-dimensional growth of SiNWs is facilitated by the SiO2 sheath that con®nes the lateral growth of SiNWs, and the...
Ngày tải lên: 16/03/2014, 15:06
Polymer assisted synthesis of aligned amorphous silicon nanowires and their core shell structures with au nanoparticles
... surface of the SiNWs Because of the high standard electrode potential of the Au3 + /Au0 couple, Au3 + has high polarization and high chemical reactivity Au3 + could be easily reduced to Au0 in air ... mass-production of highly aligned SiNWs and their core/ shell structures with metal nanoparticles for the future applications in microelectronic and optoelectronic...
Ngày tải lên: 16/03/2014, 15:06
Tailoring of amorphous siox nanowires grown by rapid thermal annealing
... assisted SiOx nanowires grown after rapid thermal annealing at 900 °C for 60 s X-ray (EDS) analysis shows that the wire is mainly composed of Si and O, whereas the seed particle is constituted by Pt ... indicating the Si L23 ELNES of the nanowire and Si substrate In conclusion, SiOx nanowires have been successfully prepared by rapid thermal annealing with the use...
Ngày tải lên: 16/03/2014, 15:09
Temperature dependence of the quality of silicon nanowires produced over a titania supported gold catalyt
... both, the bare catalyst and the product may generate Raman bands, the spectra of a reference silicon wafer and that of the fresh catalyst are included in the figure The spectrum for the fresh catalyst ... quantitative comparison of the density of SiNW left on the catalyst surface after reaction at different temperatures, the Fig SEM micrograph of silicon nan...
Ngày tải lên: 16/03/2014, 15:09
Characterization of tin catalyzed silicon nanowires synthesized by the hydrogen radical assisted deposition method
... crystalline silicon without oxygen and other impurities Conclusion Tin- catalyzed silicon nanowires (SiNWs) were synthesized at various hydrogen gas flow rates using the hydrogen radical- assisted deposition ... images of the as -synthesized SiNWs at hydrogen gas flow of (a) 130 sccm, (b) 150 sccm and (c) 180 sccm All the scale bars represent 2.5 µm (d) XRD patt...
Ngày tải lên: 16/03/2014, 15:10
Controlled growth of oriented amorphous silicon nanowires via a solid–liquid–solid (SLS) mechanism
... ring pattern (inset) in select area electron di raction (SAED) revealed that SiNWs are completely amorphous Though the reason why the resultant nanowires are amorphous instead of being crystalline ... growth, which is in fact an analogy of the VLS mechanism The growth process of the a- SiNWs via an SLS model is depicted schematically in Fig Cross-sectional SEM analysis of...
Ngày tải lên: 16/03/2014, 15:14
Electronic transport properties of single crystal silicon nanowires fabricated using an atomic force microscope
... 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
Large scale synthesis, characterization and photoluminescence properties of amorphous silica nanowires by thermal evaporation of silicon monoxide
... 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
Báo cáo y học: "Differential response of human basophil activation markers: a multi-parameter flow cytometry approach" pot
... (B) activation with μg/ml goat anti -human IgE activation was even more striking using anti -human IgE as stimulatory agent in a simultaneous assay of the same cell preparation (Figure 3) Basal ... calculated automatically with the cytometer software by averaging the total fluorescence of the marker in the basophil gate As well percentage of activated cells was calculated by t...
Ngày tải lên: 13/08/2014, 13:22
Báo cáo y học: " Extension of Murray''''s law using a non-Newtonian model of blood flow" pptx
... on arteriolar diameter Am J Physiol 1983, 245(6):H1031-H1038 Suwa N, Niwa T, Fukasuwa H, Sasaki Y: Estimation of intravascular blood pressure gradient by mathematical analysis of arterial casts ... Newtonian law or by a power -law model In that case, Murray's law remains valid for a shear-thinning fluid like blood The optimal ratio between a parent vessel radius and daug...
Ngày tải lên: 13/08/2014, 16:21
Báo cáo y học: "Fast and systematic genome-wide discovery of conserved regulatory elements using a non-alignment based approach" ppsx
... AATACATGATGAAACAcatATGAAAAAaa-aagcttttctacatattcgaggg-tttttttctgTTGGTGGa-tac TATTTAA-gaagtg AGTACATGATGAAACAcTTATAAAAaaaataagctttcTTACATGGTCTCGAGGgTTTTTCCAgctatagaaatacTATTTAAaggactA * ****** ... ctcgtgcattaagacaggctagtaTAAACGAGAAGAAGtatcctgctttgcaa TGAAACAATAGtatc-cgctaagaatttaagcaggcc tccacgcatggggattgctTGAAGAAaataggaagaaccg-gctgc TTCAACATGAAACAtcagtactatactgtcaactcctgtaggct PAR ctcctg-agta...
Ngày tải lên: 14/08/2014, 14:21
Theoretical considerations in the application of non equilibrium greens functions (NEGF) and quantum kinetic equations (QKE) to thermal transport
... Guide to Reading the Thesis For the thesis examiners, I include here a guide to point out the main flow and to list the results in the thesis to facilitate an easy access to the thesis There are ... [Maradudin1974] including his notation After the Hamiltonian of the solid is specified the next step is to seperate the quantum problem of the solid into...
Ngày tải lên: 09/09/2015, 18:57
Thermal conductance of pristine amorphous silicon nanowires a non equilibrium greens function approach
... simulations of thermal properties of a- Si [19, 20] and none for a- Si nano-wires systems This lack of a clear understanding of the thermal properties of a- Si especially as nanowires motivated us to take ... it can be seen that the mean angle of a- Si is slightly lesser than that of the tetrahedral angle of c-Si The analysis of the values obtained from this part...
Ngày tải lên: 16/10/2015, 15:35