2010 International Conference on Enabling Science and Nanotechnology (ESciNano)最新文献_第5页

Development of WebCT-based nanotechnology courses for on-line delivery: A case study 基于webct的纳米技术在线教学课程的开发:一个案例研究

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701085

S. Anwar, J. LeClair

引用次数: 0

Predicting a stretching behavior of carbon nanotubes using finite element method 用有限元法预测碳纳米管的拉伸行为

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1063/1.3587022

E. Mohammadpour, M. Awang

{"title":"Predicting a stretching behavior of carbon nanotubes using finite element method","authors":"E. Mohammadpour, M. Awang","doi":"10.1063/1.3587022","DOIUrl":"https://doi.org/10.1063/1.3587022","url":null,"abstract":"This paper describes a finite element method that is appropriate for the numerical prediction of the nonlinear mechanical behavior of different types of isolated single walled carbon nanotubes. A finite element progressive fracture model based on the modified Morse interatomic potential is used to evaluate mechanical properties of carbon nanotubes, such as axial and radial Young's modulus, shear modulus, natural frequency and buckling load are presented to illustrate the accuracy of this simulation technique. The novelty of the model lies on the use of beam element with non-linear capability, i.e, BEAM188, to evaluate SWNTs mechanical properties. In the present modeling work, individual carbon nanotube is simulated as a frame-like structure and the primary bonds between two nearest-neighboring atoms are treated as 3D beam elements. The beam element nonlinear properties are determined via the concept of energy equivalence between molecular dynamics and structural mechanics using Modified Morse potential. The calculated mechanical properties show good agreement with existing other work and experimental results as shown in Table I.","PeriodicalId":6354,"journal":{"name":"2010 International Conference on Enabling Science and Nanotechnology (ESciNano)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81534631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Beam quality of ultrashort titanium sapphire laser 超短钛蓝宝石激光器的光束质量

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701061

N. Bidin, F. Noor

引用次数: 0

Synthesis of silica nanoparticles via thermal decomposition of rice hulls and their catalytic applications in the preparations of isocoumarins 稻壳热分解合成纳米二氧化硅及其在异香豆素制备中的催化应用

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701072

A. Ramazani, A. Mahyari

{"title":"Synthesis of silica nanoparticles via thermal decomposition of rice hulls and their catalytic applications in the preparations of isocoumarins","authors":"A. Ramazani, A. Mahyari","doi":"10.1109/ESCINANO.2010.5701072","DOIUrl":"https://doi.org/10.1109/ESCINANO.2010.5701072","url":null,"abstract":"Silica nanoparticles were prepared by thermal decomposition of rice hulls. The results from XRD showed that the sample was silica NPs. The morphology and grain size of the silica NPs was investigated by SEM. As part of our ongoing program to develop efficient and robust methods for the preparation of heterocyclic compounds, we report here a simple, one-pot, three-component reaction between isocyanides, dibenzylamine and 2-formylbenzoic acid in the presence of silica NPs at ambient temperature after 5 h, leading to isocoumarin derivatives. Silica NPs were found to catalyze synthesis of isocoumarin derivatives from formylbenzoic acid, isocyanides and dibenzylamine in solvent-free conditions in high yields. We also have used silica gel powder instead of silica NPs in this reaction, but increasing of reaction times and decreasing of isocoumarin yields were observed. The use of just 0.3 g of silica NPs for 1 mmole of reactants is sufficient to push the reaction forward. Higher amounts of silica NPs (0.4 g) did not improve the result to a great extent.","PeriodicalId":6354,"journal":{"name":"2010 International Conference on Enabling Science and Nanotechnology (ESciNano)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89121108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of annealing process on ZnO nanorod prepared at different potentials using electrodeposition technique 退火工艺对不同电位下电沉积法制备ZnO纳米棒的影响

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1063/1.3586958

A. Rodzi, M. H. Mamat, M. M. Zahidi, Y. Mohd, M. Berhan, M. Rusop

引用次数: 1

Nanosphere Lithography: Fabrication of periodic arrays of nanoholes 纳米球光刻:纳米孔周期性阵列的制造

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1063/1.3587005

N. R. Md Juremi, Ubaidillah Mustafa, M. Agam, Hadi Nur

{"title":"Nanosphere Lithography: Fabrication of periodic arrays of nanoholes","authors":"N. R. Md Juremi, Ubaidillah Mustafa, M. Agam, Hadi Nur","doi":"10.1063/1.3587005","DOIUrl":"https://doi.org/10.1063/1.3587005","url":null,"abstract":"Nanosphere Lithography (NSL) is inexpensive, inherently parallel, high-throughput and general material nanofabrication technique [1] where single layer polystyrene nanosphere (PSNs) were used as template. The template created by PSNs can be manipulated by various complimentary techniques such as binary layers of PSNs [2], reactive ion etching (RIE) [3], electron beam radiation [4] and microwave irradiation [5] to create further extension patterning abilities of the basic NSL technique. The nanostructures obtained from NSL technique are found in wide range of researchers and applications such as in photonic, solar cells, biomedical etc [6 – 8]. In this study, the size of PSNs were shrunk by exposing them to O2 plasma with various of time (5 – 30 s). The average diameters of the shrinking PSNs under O2 plasma etching were plotted. The PSNs were found gradually decreases in diameter corresponded to the O2 plasma exposure and the etching rate is found to be in the range of 9.1716 nm/s. The etched PSNs were later used as template to deposit metal particles such as Pt and Au. After lift-off process, the sample with thin film Pt or Au, were later etch again to form uniform periodic nanoholes as can be shown in Fig. 1. The nanoholes were characterized by Field Emission-Scanning Electron Microscopy (FE-SEM).","PeriodicalId":6354,"journal":{"name":"2010 International Conference on Enabling Science and Nanotechnology (ESciNano)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88406569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Tungsten oxide nanoporous structure synthesized via direct electrochemical anodization 直接电化学阳极氧化法制备氧化钨纳米孔结构

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700996

S. Ismail, K. A. Razak, Pang Jing, Z. Lockman

引用次数: 3

Bilayer Graphene nanoribbon conductance model in parabolic band structure 抛物带结构的双层石墨烯纳米带电导模型

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701015

S. M. Mousavi, Mokhtar Ahmadi, N. A. Amin, Z. Johari, H. Sadeghi, S. Anwar, R. Ismail

引用次数: 3

Optical efficiency Of 0.5 at % Nd:doped concentration in Nd:YVO4 oscillator Nd:YVO4振荡器中掺钕浓度为%时的光学效率为0.5

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701065

G. Krishnan, N. Bidin

引用次数: 0

Surface morphology and optical reflection of thermally evaporated thin film al-doped silicon on plastic substrates for solar cells applications 太阳能电池用塑料基板上热蒸发掺铝硅薄膜的表面形貌和光学反射

2010 International Conference on Enabling Science and Nanotechnology (ESciNano) Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700952

M. Z. Pakhuruddin, K. Ibrahim, M. M. Ali, A. Aziz

{"title":"Surface morphology and optical reflection of thermally evaporated thin film al-doped silicon on plastic substrates for solar cells applications","authors":"M. Z. Pakhuruddin, K. Ibrahim, M. M. Ali, A. Aziz","doi":"10.1109/ESCINANO.2010.5700952","DOIUrl":"https://doi.org/10.1109/ESCINANO.2010.5700952","url":null,"abstract":"Having known the fact that Silicon (Si) costs about 50% of the overall production costs of a crystalline Si (c-Si) PV module, an obvious alternative for cost reduction is to go for a thinner c-Si, in the order of less than 50µm [1]. But, the major drawback of the thin film c-Si solar cell in this range is its relatively low efficiency compared to its bulk (300µm) c-Si counterpart [2]. This is due to the fact that at a lower Si thickness, the optical absorption of the film becomes poorer being an indirect band gap semiconductor, hence needing both photons and phonons to be involved in near-band gap absorption processes [3]. The poor optical absorption will translate into a lower generation of electron-hole pairs by the incoming photons, thus lowering the output current collected at electrodes. In order to solve this issue, the absorption coefficient of the film has to be increased. An effective light-trapping scheme has to be employed where the film surface has to be textured by any of the known methods; alkaline or acidic chemical texturing, laser annealing or by lithography process [4]. With textured surfaces, the incoming sunlight (or specifically photons) will not be bounced-off the surface straight away due to reflection effects as what would happen to planar or untextured surfaces. Instead, the photons will be made bouncing back and forth inside the absorbing layer multiple of times hence increasing the chance for the high energy photons to generate electron-hole pairs, increasing the output current and efficiency of the solar cells [5].","PeriodicalId":6354,"journal":{"name":"2010 International Conference on Enabling Science and Nanotechnology (ESciNano)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89523967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0