Pub Date : 2013-08-01DOI: 10.1109/NANO.2013.6720849
Yue Zhang, Weisheng Zhao, Jacques-Olivier Klein, W. Kang, D. Querlioz, C. Chappert, D. Ravelosona
Spin Transfer Torque Magnetic Random Access Memory (STT-MRAM) provides a promising pathway for the next generation of non-volatile memory and logic chips. The perpendicular magnetic anisotropy (PMA) in CoFeB/MgO/CoFeB magnetic tunnel junction (MTJ) nanopillar provides high thermal stability and low critical current. However, the STT switching mechanism of MTJ has been revealed intrinsically stochastic, which results from the unavoidable thermal fluctuations of magnetization. This phenomenon affects deeply the reliability of hybrid CMOS/MTJ interface circuits and drives important power overhead. In this paper, we present a multilevel cell (MLC) STT-MRAM benefiting from the stochastic behaviors. It allows not only higher storage density, but also reduces the programming power and delay. This new cell can be also used as electrical synapse to build up neuromorphic computing systems or other biological networks. Monte-Carlo statistical simulations based on a 40 nm technology node have been carried out to validate its functionality and demonstrate its performance.
{"title":"Multi-level cell Spin Transfer Torque MRAM based on stochastic switching","authors":"Yue Zhang, Weisheng Zhao, Jacques-Olivier Klein, W. Kang, D. Querlioz, C. Chappert, D. Ravelosona","doi":"10.1109/NANO.2013.6720849","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720849","url":null,"abstract":"Spin Transfer Torque Magnetic Random Access Memory (STT-MRAM) provides a promising pathway for the next generation of non-volatile memory and logic chips. The perpendicular magnetic anisotropy (PMA) in CoFeB/MgO/CoFeB magnetic tunnel junction (MTJ) nanopillar provides high thermal stability and low critical current. However, the STT switching mechanism of MTJ has been revealed intrinsically stochastic, which results from the unavoidable thermal fluctuations of magnetization. This phenomenon affects deeply the reliability of hybrid CMOS/MTJ interface circuits and drives important power overhead. In this paper, we present a multilevel cell (MLC) STT-MRAM benefiting from the stochastic behaviors. It allows not only higher storage density, but also reduces the programming power and delay. This new cell can be also used as electrical synapse to build up neuromorphic computing systems or other biological networks. Monte-Carlo statistical simulations based on a 40 nm technology node have been carried out to validate its functionality and demonstrate its performance.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116606510","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}
Porous carbon material with acid alkaline, corrosion-resistant, high temperature, thermal conductivity, electrical conductivity and a series of advantages properties, these carbon materials have been widely used in water purification, gas separation, chromatographic analysis, adsorption, catalyst carrier, supercapacitors as well as areas such as fuel cells.Template method provides a new technology for synthesizing hierarchically ordered carbon materials and has currently become one of the most popular topics in the advanced materials preparation. A novel biomorphic carbon materials were prepared using a crab shell bio-template.The physical and chemical properties of the as-obtained carbon materials were characterized by techniques including X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM). The results suggested that the bio-template method prepared porous biomorphic carbon materials consist of hollow macro-mesoporous.
{"title":"A novel crabshell bio-template route to synthesize hierarchically ordered carbon materials","authors":"Wubin Sui, Liqun Fan, Lijuan Liu, L. Zang, Xiaopeng Wang, Feng Cao, Yongfeng Zhang, Haiyang Li, Jingtang Zhang","doi":"10.1109/NANO.2013.6721033","DOIUrl":"https://doi.org/10.1109/NANO.2013.6721033","url":null,"abstract":"Porous carbon material with acid alkaline, corrosion-resistant, high temperature, thermal conductivity, electrical conductivity and a series of advantages properties, these carbon materials have been widely used in water purification, gas separation, chromatographic analysis, adsorption, catalyst carrier, supercapacitors as well as areas such as fuel cells.Template method provides a new technology for synthesizing hierarchically ordered carbon materials and has currently become one of the most popular topics in the advanced materials preparation. A novel biomorphic carbon materials were prepared using a crab shell bio-template.The physical and chemical properties of the as-obtained carbon materials were characterized by techniques including X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM). The results suggested that the bio-template method prepared porous biomorphic carbon materials consist of hollow macro-mesoporous.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121467904","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720973
Hao-Yu Wu, Yu-Wen Cheng, Ching-Fuh Lin
Gallium nitride (002) via pulsed laser deposition (PLD) is manufactured on sapphire substrate and hydrothermal-grown ZnO on sapphire. The film was deposited through the 248nm pulsed laser at 5×10- 3 torr nitrogen atmosphere. Temperature was controlled at 800 °C. The morphology of ZnO buffer layer and GaN films was examined using SEM and the crystallinity of the films was examined by XRD. In contrast to GaN grown on sapphire without any buffer layer, the one grown with ZnO buffer layer has better crystallinity due to the low lattice mismatch of ZnO and GaN. The FWHM of the GaN on ZnO XRD pattern was 0.3758°.
{"title":"GaN thin films via pulsed laser deposition with ZnO buffer layer by hydrothermal method","authors":"Hao-Yu Wu, Yu-Wen Cheng, Ching-Fuh Lin","doi":"10.1109/NANO.2013.6720973","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720973","url":null,"abstract":"Gallium nitride (002) via pulsed laser deposition (PLD) is manufactured on sapphire substrate and hydrothermal-grown ZnO on sapphire. The film was deposited through the 248nm pulsed laser at 5×10- 3 torr nitrogen atmosphere. Temperature was controlled at 800 °C. The morphology of ZnO buffer layer and GaN films was examined using SEM and the crystallinity of the films was examined by XRD. In contrast to GaN grown on sapphire without any buffer layer, the one grown with ZnO buffer layer has better crystallinity due to the low lattice mismatch of ZnO and GaN. The FWHM of the GaN on ZnO XRD pattern was 0.3758°.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123351062","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720930
Qiang Shi, Shengbo Sang, Wendong Zhang, Pengwei Li, Jie Hu, Gang Li
A comprehensive investigation of silicon microring sensor, which is used for temperature detection, is reported in this paper, and the theory was introduced in detail. Numerical analysis shows that the silicon microring has a high sensitivity and a very good linearity between real-time temperature and effective index. By optimizing the parameters, the microring sensor can obtain a higher sensitivity. The resonance peak will shift obviously when the temperature changes. A temperature change of 0.1°C can be detected. It also proves that the geometry structure of waveguide will not influence the sensor sensitivity. This sensor will have a great potential usage for real time sensing.
{"title":"Temperature sensor based on silicon microring","authors":"Qiang Shi, Shengbo Sang, Wendong Zhang, Pengwei Li, Jie Hu, Gang Li","doi":"10.1109/NANO.2013.6720930","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720930","url":null,"abstract":"A comprehensive investigation of silicon microring sensor, which is used for temperature detection, is reported in this paper, and the theory was introduced in detail. Numerical analysis shows that the silicon microring has a high sensitivity and a very good linearity between real-time temperature and effective index. By optimizing the parameters, the microring sensor can obtain a higher sensitivity. The resonance peak will shift obviously when the temperature changes. A temperature change of 0.1°C can be detected. It also proves that the geometry structure of waveguide will not influence the sensor sensitivity. This sensor will have a great potential usage for real time sensing.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116511807","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}
In this study, the mutual electrolyte structure of arrayed flexible dye-sensitized solar cell (FDSSC) was used to decrease the internal impedance. The ITO-PET substrate was etched the conductive layer (ITO) by etching solution, which designed arrayed pattern. TiO2 thin film was fabricated on the arrayed conductive substrate by spin-coating. The arrayed flexible dye-sensitized solar cell with mutual electrolyte structure can be well avoided electrolyte to contact ITO layer directly, which increased photovoltaic conversion efficiency. The arrayed flexible dye-sensitized solar cell with mutual electrolyte structure has excess electrolyte, which can obtain sufficient redox from crevice between cell and cell of mutual electrolyte structure. Compared different distances between cell and cell of mutual electrolyte structure, and the experimental results were confirmed by photovoltaic characteristic parameters and Electrochemical Impedance Spectroscopy (EIS). According to the experimental results, the distance of 1 mm has optimal characteristic parameter, which the open circuit voltage (VOC) is 0.81 V, the short circuit current density (JSC) is 1.70 mA/cm2, and the photovoltaic conversion efficiency is 0.37 %.
{"title":"Analysis of mutual electrolyte structure applied in arrayed flexible dye-sensitized solar cells","authors":"Shen-Wei Chuang, J. Chou, Yi-Hung Liao, Jui-En Hu, Shu-huei Huang, Shen-Chang Lin, Hsueh-Tao Chou","doi":"10.1109/NANO.2013.6720839","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720839","url":null,"abstract":"In this study, the mutual electrolyte structure of arrayed flexible dye-sensitized solar cell (FDSSC) was used to decrease the internal impedance. The ITO-PET substrate was etched the conductive layer (ITO) by etching solution, which designed arrayed pattern. TiO2 thin film was fabricated on the arrayed conductive substrate by spin-coating. The arrayed flexible dye-sensitized solar cell with mutual electrolyte structure can be well avoided electrolyte to contact ITO layer directly, which increased photovoltaic conversion efficiency. The arrayed flexible dye-sensitized solar cell with mutual electrolyte structure has excess electrolyte, which can obtain sufficient redox from crevice between cell and cell of mutual electrolyte structure. Compared different distances between cell and cell of mutual electrolyte structure, and the experimental results were confirmed by photovoltaic characteristic parameters and Electrochemical Impedance Spectroscopy (EIS). According to the experimental results, the distance of 1 mm has optimal characteristic parameter, which the open circuit voltage (VOC) is 0.81 V, the short circuit current density (JSC) is 1.70 mA/cm2, and the photovoltaic conversion efficiency is 0.37 %.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129508505","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}
Simultaneous reduction of graphene oxide (GO) and silver nitrate (AgNO3) into stabilizer-free Ag-Graphene Naoncomposite (AGN) using DMAc-assisted thermal reduction method with controllable density of Ag nanoparticles (Ag NPs) is reported. Microscopy techniques (scanning electron microscopy and high-resolution transmission electron microscopy) have been employed to probe the morphological characteristics of AGN and the lattice plane of Ag NPs. We observed a significant improvement on adsorption ability of AGN-P25 mixture compared with bare P25, indicating potential application on photocatalysis of AGN.
{"title":"One-pot synthesis of stabilizer-free Ag-Graphene Nanocomposite and its potential application on photodegradation of RhB","authors":"Weiyin Gao, Minqiang Wang, Chenxin Ran, Jijun Ding, Jianping Deng, Yaijing Li","doi":"10.1109/NANO.2013.6720825","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720825","url":null,"abstract":"Simultaneous reduction of graphene oxide (GO) and silver nitrate (AgNO3) into stabilizer-free Ag-Graphene Naoncomposite (AGN) using DMAc-assisted thermal reduction method with controllable density of Ag nanoparticles (Ag NPs) is reported. Microscopy techniques (scanning electron microscopy and high-resolution transmission electron microscopy) have been employed to probe the morphological characteristics of AGN and the lattice plane of Ag NPs. We observed a significant improvement on adsorption ability of AGN-P25 mixture compared with bare P25, indicating potential application on photocatalysis of AGN.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"286 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134016707","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720866
A. Wilmes, S. Pinho
A new Multi-Physics Molecular Dynamics Finite Element Method (MDFEM) is proposed, which exactly embeds the equilibrium equations of Molecular Dynamics (MD) within the computationally more favourable Finite Element Method (FEM). This MDFEM can readily implement any force field because constitutive relations are explicitly uncoupled from the geometrical element topologies. Different force fields, including bond-order reactive and fluctuating charge-dipole potentials, are implemented exactly in a commercial FE code, with both explicit and implicit dynamic formulations. The latter allows for larger length and time scales as well as eigenvalue analyses. The MDFEM is shown to be equivalent to MD, but at a considerably reduced computational cost. Results and applications include conformational and parametric topology studies of Pillared Graphene Structures, the analyses of brittle fracture in defective Carbon Nanotubes, electric field induced vibrations and electron-emissions in CNT, electric charge distribution in graphene, and the concurrent multi-scale simulation with continuum mechanics and MD domains.
{"title":"A New Multi-Physics Molecular Dynamics Finite Element Method for designing graphene based nano-structures","authors":"A. Wilmes, S. Pinho","doi":"10.1109/NANO.2013.6720866","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720866","url":null,"abstract":"A new Multi-Physics Molecular Dynamics Finite Element Method (MDFEM) is proposed, which exactly embeds the equilibrium equations of Molecular Dynamics (MD) within the computationally more favourable Finite Element Method (FEM). This MDFEM can readily implement any force field because constitutive relations are explicitly uncoupled from the geometrical element topologies. Different force fields, including bond-order reactive and fluctuating charge-dipole potentials, are implemented exactly in a commercial FE code, with both explicit and implicit dynamic formulations. The latter allows for larger length and time scales as well as eigenvalue analyses. The MDFEM is shown to be equivalent to MD, but at a considerably reduced computational cost. Results and applications include conformational and parametric topology studies of Pillared Graphene Structures, the analyses of brittle fracture in defective Carbon Nanotubes, electric field induced vibrations and electron-emissions in CNT, electric charge distribution in graphene, and the concurrent multi-scale simulation with continuum mechanics and MD domains.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130974773","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720951
Youbin Yu
Linear and nonlinear optical absorptions in one-dimensional semi-parabolic quantum dot is investigated. The analytical expression of linear and third-order nonlinear optical absorption coefficients are obtained by using compact density-matrix approach and iterative method. Numerical results are presented for an GaAs/AlGaAs quantum dot and the dependence on the quantum confinement of the semi-parabolic quantum dot, the incident optical intensity, and on the relaxation rate are also investigated. The results indicate that the optical absorption coefficients are strongly influenced by the confining frequency, relaxation time, and the incident optical intensity, respectively. However, their influences for the linear optical absorption, third-order nonlinear optical absorption, and the total optical absorption are different. We think our theoretical study may make a great contribution to experimental studies and may open up new opportunities for practical exploitation of the quantum-size effect in optical devices.
{"title":"Linear and nonlinear optical absorptions in one-dimensional quantum dot with semi-parabolic confining potential","authors":"Youbin Yu","doi":"10.1109/NANO.2013.6720951","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720951","url":null,"abstract":"Linear and nonlinear optical absorptions in one-dimensional semi-parabolic quantum dot is investigated. The analytical expression of linear and third-order nonlinear optical absorption coefficients are obtained by using compact density-matrix approach and iterative method. Numerical results are presented for an GaAs/AlGaAs quantum dot and the dependence on the quantum confinement of the semi-parabolic quantum dot, the incident optical intensity, and on the relaxation rate are also investigated. The results indicate that the optical absorption coefficients are strongly influenced by the confining frequency, relaxation time, and the incident optical intensity, respectively. However, their influences for the linear optical absorption, third-order nonlinear optical absorption, and the total optical absorption are different. We think our theoretical study may make a great contribution to experimental studies and may open up new opportunities for practical exploitation of the quantum-size effect in optical devices.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114331505","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720919
T. Falat, B. Platek, M. Zawierta, J. Felba
The increasing requirements for heat dissipation in modern microelectronic devices makes it necessary to develop new materials (e.g. thermal interface materials) with high thermal conductivity. Due to excellent thermal and thermo-mechanical properties some nanomaterials, like carbon nanotubes, are increasingly being used to create new thermally conductive composites. The development of such composites requires the good understanding of physical parameters of used materials. There is a consensus that numerical methods can greatly accelerate research on such parameters especially while nanomaterials are studied. In case of nanomaterials the best way to obtain such a physical parameters as thermal conductivity is the molecular dynamics approach. Nevertheless the simulations based on atomic-scale are very time consuming, therefore more and more attention is paid for mesoscale, where the coarse-graining approach reduces amount of particles (the groups of atoms are represented by “quasi atoms” called beads). Coarse-graining procedure reduces the amount of equation which has to be solved during simulation therefore it reduces the time of simulation. In the current paper the Coarse Grained Molecular Dynamics Approach (CGMD) to calculate the thermal conductivity of carbon nanotube is presented. The obtained results are on an acceptable level of confidence and the the acceleration of calculation of thermal conductivity was more than 5 times while the CGMD was used instead the atomic-level molecular dynamics.
{"title":"Numerical study on thermal conductivity of nanomaterials - coarse Grained Molecular Dynamics Approach","authors":"T. Falat, B. Platek, M. Zawierta, J. Felba","doi":"10.1109/NANO.2013.6720919","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720919","url":null,"abstract":"The increasing requirements for heat dissipation in modern microelectronic devices makes it necessary to develop new materials (e.g. thermal interface materials) with high thermal conductivity. Due to excellent thermal and thermo-mechanical properties some nanomaterials, like carbon nanotubes, are increasingly being used to create new thermally conductive composites. The development of such composites requires the good understanding of physical parameters of used materials. There is a consensus that numerical methods can greatly accelerate research on such parameters especially while nanomaterials are studied. In case of nanomaterials the best way to obtain such a physical parameters as thermal conductivity is the molecular dynamics approach. Nevertheless the simulations based on atomic-scale are very time consuming, therefore more and more attention is paid for mesoscale, where the coarse-graining approach reduces amount of particles (the groups of atoms are represented by “quasi atoms” called beads). Coarse-graining procedure reduces the amount of equation which has to be solved during simulation therefore it reduces the time of simulation. In the current paper the Coarse Grained Molecular Dynamics Approach (CGMD) to calculate the thermal conductivity of carbon nanotube is presented. The obtained results are on an acceptable level of confidence and the the acceleration of calculation of thermal conductivity was more than 5 times while the CGMD was used instead the atomic-level molecular dynamics.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116278526","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720982
B. Kim
Several plant leaf extracts (Pine, Persimmon, Ginkgo, Magnolia, Platanus, Cherry, etc.) were used and compared for their extracellular synthesis of nanomaterials. Stable gold, silver, copper, and platinum nanoparticles were formed by treating aqueous solution of HAuCl4, AgNO3, CuSO4·5H2O, and H2PtCl6·6H2O, respectively, with the plant leaf extracts as reducing agent. The biologically synthesized silver and copper nanoparticles showed antibacterial activities when they were coated on the surface of latex foam products. Graphene oxide, which was prepared by oxidation of natural graphite powders, was also reduced using plant leaf extracts. The reduced materials were characterized by elemental analysis, UV-vis spectroscopy, FT-IR, Raman spectroscopy, X-ray diffraction, transmission electron microscopy, thermo-gravimetric analysis, etc.
{"title":"Biological synthesis of nanomaterials using plant leaf extracts","authors":"B. Kim","doi":"10.1109/NANO.2013.6720982","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720982","url":null,"abstract":"Several plant leaf extracts (Pine, Persimmon, Ginkgo, Magnolia, Platanus, Cherry, etc.) were used and compared for their extracellular synthesis of nanomaterials. Stable gold, silver, copper, and platinum nanoparticles were formed by treating aqueous solution of HAuCl4, AgNO3, CuSO4·5H2O, and H2PtCl6·6H2O, respectively, with the plant leaf extracts as reducing agent. The biologically synthesized silver and copper nanoparticles showed antibacterial activities when they were coated on the surface of latex foam products. Graphene oxide, which was prepared by oxidation of natural graphite powders, was also reduced using plant leaf extracts. The reduced materials were characterized by elemental analysis, UV-vis spectroscopy, FT-IR, Raman spectroscopy, X-ray diffraction, transmission electron microscopy, thermo-gravimetric analysis, etc.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"285 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114493028","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：