2008 International Conference on Nanoscience and Nanotechnology最新文献_第2页

Microstructures and photocatalytic study of TiO2 nano particles coated on glass 二氧化钛纳米颗粒在玻璃表面的微观结构及光催化研究

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639246

K. Niwa, A. Masuda, Y. Ikuma

引用次数: 1

Polyacrylic acid based hydrogel-silver nanoparticles for antibacterial applications 用于抗菌应用的聚丙烯酸基水凝胶纳米银

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639253

D. Yiamsawas, K. Boonpavanitchakul, R. Sangsirimongkolying, W. Kangwansupamonkon

引用次数: 1

Terminal alkynes as a position abstraction tool for the preparation of nano materials 末端炔作为纳米材料制备的位置提取工具

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639249

Lakshmi Srinivasakannan, Subramanian Kulandaivelu, Madhulatha Wuppalamarthi

{"title":"Terminal alkynes as a position abstraction tool for the preparation of nano materials","authors":"Lakshmi Srinivasakannan, Subramanian Kulandaivelu, Madhulatha Wuppalamarthi","doi":"10.1109/ICONN.2008.4639249","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639249","url":null,"abstract":"The terminal alkyne residue, -CequivC . H is one of the most acidic among the C-H groups (Pedireddy & Desiraju,1992). The ethynyl or propargyl radical formed by removing the terminal hydrogen in an alkyne is likely to have more affinity for hydrogen. It can be used for removing the hydrogen atoms at desired places from diamondoid structures in molecular manufacturing. Hence the terminal alkynes can be used as position abstraction tool for hydrogen in the production of nano materials (Musgrave et.al. 1991). The radical of a molecule having the ethynyl or propargyl group at the end can be embedded into structures that can act like the base of a handle. This arrangement can act as an excellent tool tip. Hydrogen bonding plays an important role in deciding the suitability of a terminal alkyne to act as a tool tip molecule. An analysis of the crystallographic and spectrosc opic data help us gain an insight into C-H...X hydrogen bond interactions (Desiraju 1991, Steiner 2003). The single crystal X ray diffraction studies reveal the three dimensional view of the molecule and provide the inter molecular C ... O distances. Infrared (IR) spectroscopy has a prominent place in the history of investigation of hydrogen bonding (Mootz and Deeg 1992). The choice of terminal acetelenes to act as a tool tip molecule can be made by taking into consideration the evidence obtained from crystallographic and spectroscopic data. The crystallographic (Lakshmi et al, 1996) and spectroscopic data of 7beta hydroxy -7alpha-(3-propargyl)-3-methyl-spiro[5.5]undec- 2-en-l-one are analysed.","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131926944","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

Carbon molecules oscillating in carbon nanotube bundles 碳分子在碳纳米管束中振荡

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639289

N. Thamwattana, B. Cox, J.M. Hill

{"title":"Carbon molecules oscillating in carbon nanotube bundles","authors":"N. Thamwattana, B. Cox, J.M. Hill","doi":"10.1109/ICONN.2008.4639289","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639289","url":null,"abstract":"Fullerenes C60 and carbon nanotubes are of considerable interest to researchers from many scientific areas due to their unique electronic and mechanical properties. One application of these carbon nanostructures that has recently attracted much attention is the creation of an oscillator that operates in the gigahertz range frequency. A number of studies have found that the sliding of the inner-shell inside the outer-shell of a multi-walled carbon nanotube can generate gigahertz oscillatory frequencies. In this paper, we investigate the mechanics of a gigahertz oscillator comprising a carbon nanotube oscillating within the centre of a uniform concentric ring or bundle of carbon nanotubes. Since much higher frequencies can be generated from a C60 fullerene oscillating inside a nanotube, we also consider the case of a C60 fullerene oscillating within a bundle of carbon nanotubes. Using the Lennard-Jones potential and the continuum approach, we obtain a relation between the bundle radius and the radii of the nanotubes forming the bundle, as well as the optimum bundle size which gives rise to the maximum oscillatory frequency for both the C60 and the nanotube bundle oscillators. While previous studies in this area have been undertaken through molecular dynamics simulations, this paper emphasizes the use of applied mathematical modelling techniques which provides considerable insight into the underlying mechanisms. The paper presents a synopsis of the major results derived in detail by the present authors in [1, 2].","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134343719","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: 6

Antimicrobial and antibacterial effects of silver nanoparticles synthesized by novel electrochemical method 新型电化学方法合成纳米银的抗菌及抑菌效果

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639241

Yuri Estrin, R. Khaydarov, R. Khaydarov, Thomas Scheper, Christian Endres, Seung Y. Cho

引用次数: 4

Electro-deposition of gold nano-structures on gold Quartz Crystal Microbalance (QCM) electrodes for enhanced mercury vapour sensitivity in the presence of interferent gases 在干扰气体存在下，在金石英晶体微天平(QCM)电极上电沉积金纳米结构以增强汞蒸气敏感性

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639248

Y. Sabri, S. Ippolito, J. Tardio, D. Sood, S. Bhargava

引用次数: 2

Microstructural stability and microhardness of ultrafine grained and nanostructured Cu-5vol.%Al2O3 composite lumps/powders produced by high energy mechanical milling 超细晶和纳米结构Cu-5vol的显微组织稳定性和显微硬度。高能机械铣削生产的%Al2O3复合块/粉末

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639245

A. Mukhtar, Deliang Zhang, C. Kong, P. Munroe

{"title":"Microstructural stability and microhardness of ultrafine grained and nanostructured Cu-5vol.%Al2O3 composite lumps/powders produced by high energy mechanical milling","authors":"A. Mukhtar, Deliang Zhang, C. Kong, P. Munroe","doi":"10.1109/ICONN.2008.4639245","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639245","url":null,"abstract":"Ultrafine grained lumps and a nanostructured powder of Cu-5vol%Al2O3 composite were produced using two high energy mechanical milling routes respectively. The milled composite materials were heat treated at 150, 300 and 500 degC for 1 hour, respectively, to determine the microstructural stability and micohardness changes of the materials as a function of the heat treatment condition. For the Cu-5vol.%Al2O3 composite lumps produced using route 1 (12 hours milling), after heat treatment at 150 degC, the Cu grain sizes decreased from the range of 100-250 nm to the range of 50-180 nm due to recrystallisation, but its average microhardness also decreased from 224 HV to 212 HV due to reduction of dislocation density. For the 24 hours milled Cu-5vol%Al2O3 powder produced using Route 2, the Cu grain sizes increase slightly from the range of 40-180 nm to the range of 50-200 nm, and as the result of this grain coarsening and decrease of dislocation density, the average microhardness decreased from 270 HV to 257 HV respectively. Further increasing the annealing temperature to 300 degC caused the grain sizes of the 12 hours milled lumps to increase to the range of 50-350 nm, and those of the 24 hours milled powder to 60-300 nm, both resulting in a decrease in the average microhardness to 207 HV for the lumps and 248 HV for the powder. Increasing the annealing temperature from 300 to 500 degC caused a much more significant increase of the Cu grain sizes of both the lumps and the powder, and a significant decrease in the microhardness of the 24 hours milled powder particles to 216 HV. However, the microhardness of the lumps decreases very little to 196 HV, suggesting the significant reinforcement effect of the Al2O3 nanoparticles.","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121977264","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

The purification of chemically synthesized graphene 化学合成石墨烯的提纯

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639233

Mohammad Choucair, J. Stride

引用次数: 1

The influence of interphase between nanoparticles and matrix on Young’s Modulus of nanocomposites 纳米颗粒与基体间相对纳米复合材料杨氏模量的影响

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639237

Yan Ding, K. Tran, J. Gear, D. Mainwaring, P. Murugaraj

引用次数: 7

Non radiative decay processes in nanocrystals: Is the Auger model consistent with experiment? 纳米晶体中的非辐射衰变过程:俄歇模型与实验一致吗?

2008 International Conference on Nanoscience and Nanotechnology Pub Date : 2008-10-07 DOI: 10.1109/ICONN.2008.4639287

M. Califano

引用次数: 0