Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639246
K. Niwa, A. Masuda, Y. Ikuma
TiO2 nano powder was mixed with Si-alkoxide and coated on glass plate. The glass plate was fired, and then photocatalytic activity was evaluated. Also microstructures were observed to study what is important for high photocatalytic activity in this system.
{"title":"Microstructures and photocatalytic study of TiO2 nano particles coated on glass","authors":"K. Niwa, A. Masuda, Y. Ikuma","doi":"10.1109/ICONN.2008.4639246","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639246","url":null,"abstract":"TiO2 nano powder was mixed with Si-alkoxide and coated on glass plate. The glass plate was fired, and then photocatalytic activity was evaluated. Also microstructures were observed to study what is important for high photocatalytic activity in this system.","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"32 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":"126806215","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}
Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639253
D. Yiamsawas, K. Boonpavanitchakul, R. Sangsirimongkolying, W. Kangwansupamonkon
Polyacrylic acid based hydrogels were prepared by free radical polymerization with redox initiator system in the presence of N,Npsila-methylenebisacrylamide. Silver (Ag) nanoparticles have been uniformly distributed in these hydrogel networks via in situ reduction of silver nitrate by sodium borohydride (reducing agent). The UV-vis spectrophotometry and scanning electron microscopy are applied to confirm the formation of silver nanoparticles. The silver-hydrogel nanocomposites are also demonstrated antibacterial effects on Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) and Micrococcus luteus (M. luteus).
{"title":"Polyacrylic acid based hydrogel-silver nanoparticles for antibacterial applications","authors":"D. Yiamsawas, K. Boonpavanitchakul, R. Sangsirimongkolying, W. Kangwansupamonkon","doi":"10.1109/ICONN.2008.4639253","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639253","url":null,"abstract":"Polyacrylic acid based hydrogels were prepared by free radical polymerization with redox initiator system in the presence of N,Npsila-methylenebisacrylamide. Silver (Ag) nanoparticles have been uniformly distributed in these hydrogel networks via in situ reduction of silver nitrate by sodium borohydride (reducing agent). The UV-vis spectrophotometry and scanning electron microscopy are applied to confirm the formation of silver nanoparticles. The silver-hydrogel nanocomposites are also demonstrated antibacterial effects on Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) and Micrococcus luteus (M. luteus).","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"63 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":"125094234","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}
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.
末端炔残基-CequivC。H是C-H基团中酸性最强的基团之一(Pedireddy & Desiraju,1992)。除去炔末端氢形成的乙基或丙炔自由基可能对氢有更大的亲和力。它可用于在分子制造中从金刚石结构中去除所需位置的氢原子。因此，末端炔可以用作纳米材料生产中氢的位置提取工具(Musgrave等)。1991)。末端有乙基或丙炔基的分子的自由基可以嵌入到类似把手底部的结构中。这种安排可以作为一个很好的工具提示。氢键在决定末端炔作为工具尖分子的适宜性方面起着重要作用。对晶体学和光谱数据的分析有助于我们深入了解C-H…X氢键相互作用(Desiraju 1991, Steiner 2003)。单晶X射线衍射研究揭示了分子的三维视图，并提供了分子间的C…O距离。红外光谱学在氢键研究历史上占有重要地位(Mootz and Deeg 1992)。选择末端乙炔作为工具尖端分子，可以考虑从晶体学和光谱数据中获得的证据。对7β -羟基- 7α -(3-丙炔基)-3-甲基-螺[5.5]undec- 2-烯- 1的晶体学(Lakshmi et al, 1996)和光谱数据进行了分析。
{"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}
Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639289
N. Thamwattana, B. Cox, J.M. Hill
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].
{"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}
Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639241
Yuri Estrin, R. Khaydarov, R. Khaydarov, Thomas Scheper, Christian Endres, Seung Y. Cho
Antimicrobial/antifungal effects of silver nanoparticles obtained with a novel electrochemical method on Escherichiacoli, Staphylococcusaureus, Aspergillusniger and Penicilliumphoeniceum cultures have been studied. The tests conducted have demonstrated that synthesized silver nanoparticles - when added to water paints or cotton fabrics - show a pronounced antibacterial/antifungal effect.
{"title":"Antimicrobial and antibacterial effects of silver nanoparticles synthesized by novel electrochemical method","authors":"Yuri Estrin, R. Khaydarov, R. Khaydarov, Thomas Scheper, Christian Endres, Seung Y. Cho","doi":"10.1109/ICONN.2008.4639241","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639241","url":null,"abstract":"Antimicrobial/antifungal effects of silver nanoparticles obtained with a novel electrochemical method on <i>Escherichia</i> <i>coli</i>, <i>Staphylococcus</i> <i>aureus</i>, <i>Aspergillus</i> <i>niger</i> and <i>Penicillium</i> <i>phoeniceum</i> cultures have been studied. The tests conducted have demonstrated that synthesized silver nanoparticles - when added to water paints or cotton fabrics - show a pronounced antibacterial/antifungal effect.","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"9 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":"129408986","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}
Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639248
Y. Sabri, S. Ippolito, J. Tardio, D. Sood, S. Bhargava
Gold electrode quartz crystal microbalances (QCMs) were used as transducing platform to detect and sense elemental mercury (Hg) in gas phase. The enhanced sensitivity, resulting form the electro-deposition of gold nano-structures on the surface is shown to increase the response magnitude (RM) of the sensors in the presence of ammonia and humidity interference. The concentration of NH3 and H2O was varied in the range 590 to 1770mg/m3 and 4.2 to 10.4mg/m3, respectively. A constant gas flow of 200sccm, balanced in nitrogen was used as the carrier gas. The RM for Hg was enhanced by creating nanostructures on the sensorpsilas gold electrodes via electro-deposition of gold in a lead acetate electrolyte. The results presented are a critical step in the development of a cheap regenerable and reliable sensor for measuring Hg in the presence of interferents gases commonly found in industrial applications.
{"title":"Electro-deposition of gold nano-structures on gold Quartz Crystal Microbalance (QCM) electrodes for enhanced mercury vapour sensitivity in the presence of interferent gases","authors":"Y. Sabri, S. Ippolito, J. Tardio, D. Sood, S. Bhargava","doi":"10.1109/ICONN.2008.4639248","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639248","url":null,"abstract":"Gold electrode quartz crystal microbalances (QCMs) were used as transducing platform to detect and sense elemental mercury (Hg) in gas phase. The enhanced sensitivity, resulting form the electro-deposition of gold nano-structures on the surface is shown to increase the response magnitude (RM) of the sensors in the presence of ammonia and humidity interference. The concentration of NH3 and H2O was varied in the range 590 to 1770mg/m3 and 4.2 to 10.4mg/m3, respectively. A constant gas flow of 200sccm, balanced in nitrogen was used as the carrier gas. The RM for Hg was enhanced by creating nanostructures on the sensorpsilas gold electrodes via electro-deposition of gold in a lead acetate electrolyte. The results presented are a critical step in the development of a cheap regenerable and reliable sensor for measuring Hg in the presence of interferents gases commonly found in industrial applications.","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":"127664128","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}
Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639245
A. Mukhtar, Deliang Zhang, C. Kong, P. Munroe
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.
{"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}
Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639233
Mohammad Choucair, J. Stride
Numerous techniques for the purification of chemically synthesized graphene have been investigated, exploiting the relative aqueous solubilities of the impurities and carbon sheets. This demonstrates that simple aqueous washing provides a reliable platform for the purification of graphene, without the need for harsh chemical treatments. The presence of cavities or pores in the as-obtained graphene structure are believed to inhibit small particles, that are interspersed throughout the material, from undergoing hydrolysis reactions.
{"title":"The purification of chemically synthesized graphene","authors":"Mohammad Choucair, J. Stride","doi":"10.1109/ICONN.2008.4639233","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639233","url":null,"abstract":"Numerous techniques for the purification of chemically synthesized graphene have been investigated, exploiting the relative aqueous solubilities of the impurities and carbon sheets. This demonstrates that simple aqueous washing provides a reliable platform for the purification of graphene, without the need for harsh chemical treatments. The presence of cavities or pores in the as-obtained graphene structure are believed to inhibit small particles, that are interspersed throughout the material, from undergoing hydrolysis reactions.","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"58 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":"127259520","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}
Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639237
Yan Ding, K. Tran, J. Gear, D. Mainwaring, P. Murugaraj
Thin nanocomposite films are gaining increasing significance in flexible and light weight electronic devices as well as emerging nanoelectronic structures. The present work investigates the influence of the interphase between spherical nanoparticles and a polymer matrix on the Youngpsilas modulus and shear modulus of a nanocomposite thin film. The interphase region is considered inhomogeneous, but isotropic, thus is modeled as a function of the thickness of the interphase region, which is affected by the material properties of the nanoparticles, the polymer matrix, as well as the volume fraction of the nanocomposite. The property of the interphase at the matrix boundary is assumed to be smooth and continuous, while at the particle boundary it is discontinuous. The replacement method is adopted to calculate the shear modulus and Youngpsilas modulus of the nanocomposite, based on the mathematical model of the interphase. The results are compared with the experimental data in literature.
{"title":"The influence of interphase between nanoparticles and matrix on Young’s Modulus of nanocomposites","authors":"Yan Ding, K. Tran, J. Gear, D. Mainwaring, P. Murugaraj","doi":"10.1109/ICONN.2008.4639237","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639237","url":null,"abstract":"Thin nanocomposite films are gaining increasing significance in flexible and light weight electronic devices as well as emerging nanoelectronic structures. The present work investigates the influence of the interphase between spherical nanoparticles and a polymer matrix on the Youngpsilas modulus and shear modulus of a nanocomposite thin film. The interphase region is considered inhomogeneous, but isotropic, thus is modeled as a function of the thickness of the interphase region, which is affected by the material properties of the nanoparticles, the polymer matrix, as well as the volume fraction of the nanocomposite. The property of the interphase at the matrix boundary is assumed to be smooth and continuous, while at the particle boundary it is discontinuous. The replacement method is adopted to calculate the shear modulus and Youngpsilas modulus of the nanocomposite, based on the mathematical model of the interphase. The results are compared with the experimental data in literature.","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"53 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":"132136471","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}
Pub Date : 2008-10-07DOI: 10.1109/ICONN.2008.4639287
M. Califano
Although recent experimental evidence seems to refute the Auger hypothesis, I will show that the observed decay times can be accounted for within the model, without the need to invoke more exotic mechanisms.
{"title":"Non radiative decay processes in nanocrystals: Is the Auger model consistent with experiment?","authors":"M. Califano","doi":"10.1109/ICONN.2008.4639287","DOIUrl":"https://doi.org/10.1109/ICONN.2008.4639287","url":null,"abstract":"Although recent experimental evidence seems to refute the Auger hypothesis, I will show that the observed decay times can be accounted for within the model, without the need to invoke more exotic mechanisms.","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"133 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":"122429995","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}
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