Theoretical investigation on thermal properties of silicon based nanostructures

... THEORETICAL INVESTIGATION ON THERMAL PROPERTIES OF SILICON BASED NANOSTRUCTURES CHEN JIE (M.Sc., Nanjing University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF ... DEPARTMENT OF PHYSICS NATIONAL UNIVERSITY OF SINGAPORE 2011 Dedicated to my wife Chunliu and our parents THEORETICAL INVESTIGATION ON THERMAL PROPERTIES OF SILIC...

Ngày tải lên: 10/09/2015, 08:38

... 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

... 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

... asymptotically the value of the band-gap of the undoped Si-nw This is another indication of how doping can modify the electronic and optical properties of the Si nanostructures Conclusions 3.2 3.4 ... systematic analysis of the effect of the B and P codoping in Si-nw, concentrating not only on the structural properties but also on how doping i...

Ngày tải lên: 16/03/2014, 15:15

... 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

... http://www.nanoscalereslett.com /content/ 6/1/161 function of the Nd concentration and the annealing temperature in relation with their microstructures The Nd- doped silicon- rich silicon oxide (SRSO) thin layers were synthesized ... emission of Nd3 + ions is more efficient while Si-np are formed, and while the Nd content is low (0.08 at.%) In such conditions,...

Ngày tải lên: 21/06/2014, 05:20

... Morphology of the MWCNTs Figure 5(a–c) shows the SEM micrographs of the MWCNTs of the as-produced and the functionalized tubes As seen from Fig 5a, the raw MWCNTs are produced in the form of agglomerated ... amide -MWCNTs/ polyimide and that of acid -MWCNTs/ polyimide composites are almost 123 One unique property of the MWCNTs is their electrical...

Ngày tải lên: 22/06/2014, 01:20

... matrix and SBS gels were mixed with NR at a given concentration, to investigate their effect on the morphology, mechanical, dynamic mechanical and thermal properties of raw SBR and NR Morphology of ... diffusion of these curing agents during prevulcanization and hence higher amount of crosslinking The effect of sulfur crosslinking is also very pronounced on the m...

Ngày tải lên: 22/06/2014, 01:20

... Japan Cover glass was purchased from Matsunami Glass Ind., Ltd., Japan A photoresist (OFPR-800) was purchased from Tokyo Ohka Kogyo Co., Ltd., Japan CNT immobilization on glass Fabrication of ... to fabricate a nanotube device on a cover glass and to investigate its applications Regarding the fabrication process of the nanotube FET sensor, chemical vapor deposition (CVD...

Ngày tải lên: 22/06/2014, 18:20

... 7.4.4 Chaotic advection near resonance 136 7.4.5 Effect of Re 138 7.4.6 Effect of conjugated condition 140 7.5 Conclusion 145 Chapter Conclusion and recommendations ... studied the effect of chaotic advection and the transition to chaos in wavy microchannels Their results showed that presence of chaotic advection in the system can enhance the thermal perfo...

Ngày tải lên: 09/09/2015, 08:20

... rocky church crypt [3], the energetic behavior and the microclimate of different hypogeous structures in the site of the "Sassi of Matera" [4, 5], and the thermal behavior of different opaque envelopes ... namely, “Tufo of Matera” for the structures of the "Sassi of Matera," and “Stone of Fasano” for the structures of the "Trulli of...

Ngày tải lên: 05/09/2013, 14:58

... composition of the Fe-Pt nanoparticles was controlled by adjusting the current density (corresponding to the applied voltage) When the current density of 15 – 20 mA/cm2, the composition of nanoparticles ... [21] The broad peak on the DSC trace in the FePt nanoparticles suggests that there was no such transition in the FePt nanoparticles upon annealing Th...

Ngày tải lên: 13/02/2014, 03:20

... (1993) The effect of cross-linking of the subunits of NADPH -protochlorophyllide oxidoreductase on the aggregational state of protochlorophyllide Photosynthetica 29, 205–218 Wiktorsson, B., Ryberg, ... The effect of the presence of the adenylates on the ability of POR-PChlide640 to undergo photoconversion was checked by comparing the efficiency of photoc...

Ngày tải lên: 22/02/2014, 04:20

... wheel, the longer path The increasing speed of the wheel make the thickness of ribbons thinner and the ratio between the area and volume of the ribbons that contact with the surface of the wheel ... that the wheel gets heat faster and more than from inside of the ribbon, so the ribbon is cooled faster Therefore, the speed of the wheel is proportiona...

Ngày tải lên: 05/03/2014, 14:20