Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609277
T. Remyamol, H. John, P. Gopinath
We have covalently functionalized reduced graphene oxide with camphor sulphonic acid doped polyaniline using phenylene diamine as a linker and the hybrid was characterized by Fourier transform infrared spectroscopy, X-ray diffraction analysis, X-ray photoelectron spectroscopy, UV-Visible spectroscopy and scanning electron microscopy. Nonlinear optical properties of the hybrid, graphite oxide and the pristine polyaniline were investigated by open aperture Z-scan technique at 532 nm. At the same mass concentration (0.2 g/l), the hybrid exhibited improved limiting compared to the GO and pristine polyaniline due to the synergetic combination of nonlinear mechanisms of polyaniline and reduced graphene oxide.
{"title":"Phenylene diamine mediated covalent grafting of polyaniline on reduced graphene oxide for optical Limiting","authors":"T. Remyamol, H. John, P. Gopinath","doi":"10.1109/ICANMEET.2013.6609277","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609277","url":null,"abstract":"We have covalently functionalized reduced graphene oxide with camphor sulphonic acid doped polyaniline using phenylene diamine as a linker and the hybrid was characterized by Fourier transform infrared spectroscopy, X-ray diffraction analysis, X-ray photoelectron spectroscopy, UV-Visible spectroscopy and scanning electron microscopy. Nonlinear optical properties of the hybrid, graphite oxide and the pristine polyaniline were investigated by open aperture Z-scan technique at 532 nm. At the same mass concentration (0.2 g/l), the hybrid exhibited improved limiting compared to the GO and pristine polyaniline due to the synergetic combination of nonlinear mechanisms of polyaniline and reduced graphene oxide.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"36 1","pages":"204-207"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91406552","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609348
Y. Veeraswamy, Y. Vijayakumr, M. V. Ramana Reddy
Indium oxide of purity 99.99% powder was used as starting material for the preparation of Indium oxide thin films using vacuum thermal evaporation technique. Ultrasonically cleaned and dried glass substrates were used for deposition of In2O3 thin films. Films were grown in vacuum of 3×10-5mbar pressure followed by annealing in air in the temperature range 573K - 873K. The crystallinity of the films were investigated using XRD. The films were found to be polycrystalline in nature and crystallizes in a cubic structure with preferred (222) orientation. The surface morphology was investigated for these films using Scanning Electron Microscope (SEM) and chemical composition of the films was estimated using EDS. The Optical transparency of these films was found to be varying with annealing temperature and at 673K the transmittance was found to be maximum. Thickness of the films was found to be 918nm. The optical band gap was also varying with annealing temperature. The PL emission spectra were taken at excitation wave length of 350nm. In2O3 thin films shown PL emission in the UV region at room temperature, which encourages development of nano scale devices in future.
{"title":"Structural and optical characterization of indium oxide thin films by vacuum thermal evaporation","authors":"Y. Veeraswamy, Y. Vijayakumr, M. V. Ramana Reddy","doi":"10.1109/ICANMEET.2013.6609348","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609348","url":null,"abstract":"Indium oxide of purity 99.99% powder was used as starting material for the preparation of Indium oxide thin films using vacuum thermal evaporation technique. Ultrasonically cleaned and dried glass substrates were used for deposition of In2O3 thin films. Films were grown in vacuum of 3×10-5mbar pressure followed by annealing in air in the temperature range 573K - 873K. The crystallinity of the films were investigated using XRD. The films were found to be polycrystalline in nature and crystallizes in a cubic structure with preferred (222) orientation. The surface morphology was investigated for these films using Scanning Electron Microscope (SEM) and chemical composition of the films was estimated using EDS. The Optical transparency of these films was found to be varying with annealing temperature and at 673K the transmittance was found to be maximum. Thickness of the films was found to be 918nm. The optical band gap was also varying with annealing temperature. The PL emission spectra were taken at excitation wave length of 350nm. In2O3 thin films shown PL emission in the UV region at room temperature, which encourages development of nano scale devices in future.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"49 8","pages":"502-505"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91501706","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609384
M. Ismaeel Maricar, J. Glover, G. Evans, A. Khalid, V. Papageorgiou, Li Chong, G. Dunn, A. Stephen, M. Montes Bajo, Martin Kuball, D. Cumming, C. Oxley
The paper describes the planar Gunn diode, which is a device well suited to provide milli-metric and tera-hertz sources using microwave monolithic integrated circuit technologies. Different planar Gunn electrode geometries are described along with DC, RF and thermal characterisation. To realize the planar high frequency sources there is requirement for high frequency planar resonators, the paper will describe both the radial and new diamond shaped geometries.
{"title":"Planar gunn diode characterisation and resonator elements to realise oscillator circuits","authors":"M. Ismaeel Maricar, J. Glover, G. Evans, A. Khalid, V. Papageorgiou, Li Chong, G. Dunn, A. Stephen, M. Montes Bajo, Martin Kuball, D. Cumming, C. Oxley","doi":"10.1109/ICANMEET.2013.6609384","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609384","url":null,"abstract":"The paper describes the planar Gunn diode, which is a device well suited to provide milli-metric and tera-hertz sources using microwave monolithic integrated circuit technologies. Different planar Gunn electrode geometries are described along with DC, RF and thermal characterisation. To realize the planar high frequency sources there is requirement for high frequency planar resonators, the paper will describe both the radial and new diamond shaped geometries.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"1 1","pages":"597-601"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88676195","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609221
Umme Thahira Khatoon, G. Nageswara Rao, M. Mohan
Copper nanoparticles were synthesized using chemical reduction method by reduction of copper sulphate as a metal precursor and sodium borohydride as reducing agent. The particles are characterized and assessed by UV-Vis spectrometer, SEM-EDS and particle size analysis. SEM-EDS and particle size analysis contributed to the analysis of size, shape and composition of copper nanoparticles. UV-Vis spectrometer contributed to analysis of optical properties of the nanoparticles which showed a 550nm and 800nm copper band. The SEM images are also observed and found to be in agreement with the UV-Vis result, confirming the formation of metallic copper nanoparticles. The average particle size at room temperature was less than 16nm. The sizes of the nanoparticles are more controllable by the chemical reduction method.
{"title":"Synthesis and characterization of copper nanoparticles by chemical reduction method","authors":"Umme Thahira Khatoon, G. Nageswara Rao, M. Mohan","doi":"10.1109/ICANMEET.2013.6609221","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609221","url":null,"abstract":"Copper nanoparticles were synthesized using chemical reduction method by reduction of copper sulphate as a metal precursor and sodium borohydride as reducing agent. The particles are characterized and assessed by UV-Vis spectrometer, SEM-EDS and particle size analysis. SEM-EDS and particle size analysis contributed to the analysis of size, shape and composition of copper nanoparticles. UV-Vis spectrometer contributed to analysis of optical properties of the nanoparticles which showed a 550nm and 800nm copper band. The SEM images are also observed and found to be in agreement with the UV-Vis result, confirming the formation of metallic copper nanoparticles. The average particle size at room temperature was less than 16nm. The sizes of the nanoparticles are more controllable by the chemical reduction method.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"34 1","pages":"11-14"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78725247","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609257
K. Amutha, G. Sivakumar
An attempt of vitrified bioceramic tiles was made from bioresidue material of rice straw ash as a source of bio-silica. The high purity nanosilica was synthesized from rice straw ash (RSA) using sol-gel method. Biosilica can be substituted for quartz in ceramic tiles to improve the strength and mechanical behaviour. Quartz was placed instead of 5 wt% and 10 wt% biosilica (BS) in porcelain ceramic tiles. All the specimens were sintered at 1250°C and mechanical parameters were carried out to determine their physico-mechanical properties. The developments of microstructural and phases analysis on the specimens were carried out using SEM and XRD techniques. Rod shaped mullite crystals with low aspect ratio were found distributed in the microstructure. Mullite and quartz phases were observed in the XRD pattern. When the porosity nearer to zero correspondingly compressive strength becomes maximum and the strength was correlated to the ultrasonic pulse velocity.
{"title":"Densification behaviour of bioceramic tiles from bioresidue","authors":"K. Amutha, G. Sivakumar","doi":"10.1109/ICANMEET.2013.6609257","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609257","url":null,"abstract":"An attempt of vitrified bioceramic tiles was made from bioresidue material of rice straw ash as a source of bio-silica. The high purity nanosilica was synthesized from rice straw ash (RSA) using sol-gel method. Biosilica can be substituted for quartz in ceramic tiles to improve the strength and mechanical behaviour. Quartz was placed instead of 5 wt% and 10 wt% biosilica (BS) in porcelain ceramic tiles. All the specimens were sintered at 1250°C and mechanical parameters were carried out to determine their physico-mechanical properties. The developments of microstructural and phases analysis on the specimens were carried out using SEM and XRD techniques. Rod shaped mullite crystals with low aspect ratio were found distributed in the microstructure. Mullite and quartz phases were observed in the XRD pattern. When the porosity nearer to zero correspondingly compressive strength becomes maximum and the strength was correlated to the ultrasonic pulse velocity.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"66 1","pages":"130-132"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83915287","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609232
P. Kuppusami, Akash Singh, E. Mohandas
An investigation on the structural, nano-mechanical and tribological properties of thin films of ZrAlN deposited on (100) Si and D-9 alloy substrates prepared by pulsed DC magnetron is reported. Zr1-xAlxNy films have been studied with the Al concentration range of 0<;x<;0.36 Al. It was observed that values of hardness and Young's modulus of the alloyed ZrAlN films were in the range 9-18 GPa and 235-365 GPa, respectively. Tribological studies of ZrAlN thin film showed that the coefficient of friction of alloyed films of ZrAlN was lower for the steel ball (100Cr6 steel) than that for the Al2O3 ball up to 36 at.% of Al.
{"title":"Microstructural, nanomechanical and tribological properties of ZrAlN thin films prepared by pulsed DC magnetron sputtering","authors":"P. Kuppusami, Akash Singh, E. Mohandas","doi":"10.1109/ICANMEET.2013.6609232","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609232","url":null,"abstract":"An investigation on the structural, nano-mechanical and tribological properties of thin films of ZrAlN deposited on (100) Si and D-9 alloy substrates prepared by pulsed DC magnetron is reported. Zr1-xAlxNy films have been studied with the Al concentration range of 0<;x<;0.36 Al. It was observed that values of hardness and Young's modulus of the alloyed ZrAlN films were in the range 9-18 GPa and 235-365 GPa, respectively. Tribological studies of ZrAlN thin film showed that the coefficient of friction of alloyed films of ZrAlN was lower for the steel ball (100Cr6 steel) than that for the Al2O3 ball up to 36 at.% of Al.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"1 1","pages":"55-57"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89950980","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609317
K. Prashantk
Intermediate-temperature Solid Oxide fuel cells (ITSOFC) can be used as an alternative energy source due to their negligible waste production and high power efficiencies. Here, analysis of an electrolyte material Ce0.8Gd0.2O1.9 (GDC20) is done. Five dense electrolyte samples are prepared at sintering temperatures of (1350, 1400, 1450, 1550 and 1600°C) were prepared and their properties like relative density, grain size and grain growth, ionic conductivity and power density were analyzed comparatively. Average density was found to be 89.93% and average grain size was in the range of 1.64μm-10.4μm.). Impedance result of all samples was examined at different temperatures (200°C-800°C) with frequency change from 1e7 hertz to 0.1 hertz for each working temperature. Exponential increase in ionic conductivity was observed in the temperature ranges of (500-800°C) for all five sample. Highest conductivity values were recorded for 1550°C sintered sample which was 8.479e-6 S/m at 200°C and 10.159 S/m at 800°C. Excellent power densities of were observed respectively. The best conductivities and power values were obtained for the 1550°C sample in the temperature range 600-800°C. Ionic conductivity values were exponentially higher in the higher temperature regions for all samples. Conventional SOFCs have an average efficiency of 70% and the use of GDC can lower the operating temperature hence increasing its usage in mining engineering, high-altitude power generation and usage in any treacherous environment.
{"title":"Solid oxide fuel cells as alternative energy source for sustainable development","authors":"K. Prashantk","doi":"10.1109/ICANMEET.2013.6609317","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609317","url":null,"abstract":"Intermediate-temperature Solid Oxide fuel cells (ITSOFC) can be used as an alternative energy source due to their negligible waste production and high power efficiencies. Here, analysis of an electrolyte material Ce0.8Gd0.2O1.9 (GDC20) is done. Five dense electrolyte samples are prepared at sintering temperatures of (1350, 1400, 1450, 1550 and 1600°C) were prepared and their properties like relative density, grain size and grain growth, ionic conductivity and power density were analyzed comparatively. Average density was found to be 89.93% and average grain size was in the range of 1.64μm-10.4μm.). Impedance result of all samples was examined at different temperatures (200°C-800°C) with frequency change from 1e7 hertz to 0.1 hertz for each working temperature. Exponential increase in ionic conductivity was observed in the temperature ranges of (500-800°C) for all five sample. Highest conductivity values were recorded for 1550°C sintered sample which was 8.479e-6 S/m at 200°C and 10.159 S/m at 800°C. Excellent power densities of were observed respectively. The best conductivities and power values were obtained for the 1550°C sample in the temperature range 600-800°C. Ionic conductivity values were exponentially higher in the higher temperature regions for all samples. Conventional SOFCs have an average efficiency of 70% and the use of GDC can lower the operating temperature hence increasing its usage in mining engineering, high-altitude power generation and usage in any treacherous environment.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"70 1","pages":"459-463"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81528242","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609269
M. Poloju, M. V. Ramana Reddy
High purity ZnO nano particles and Indium (In) doped Zinc oxide (ZnO) nano particles were synthesized by simple sol-gel technique at low temperature of 70°C. Different compositions of Indium (In) doped zinc oxide with Zn1-xInxO (x=0.01 to 0.08 atomic percent) were prepared by low cost sol-gel technique. The powders were examined for their structural study using XRD. It has been found from diffraction data that the pure and Indium doped powders have formed to be single phase hexagonal wurtzite crystal structure. The microcstrutured parameters such as strain, lattice constant, particle size, dislocation density, bond lengths between Zn and O were calculated. Using the calculated values of particle size from XRD & SEM crystallinity index was estimated. From the observed crystallinity index data of the prepared nano materials it was confirmed that the materials were showing polycrystalline nature.
{"title":"Structural and morphological features of sol-gel processed pure and Indium doped ZnO nanoparticles","authors":"M. Poloju, M. V. Ramana Reddy","doi":"10.1109/ICANMEET.2013.6609269","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609269","url":null,"abstract":"High purity ZnO nano particles and Indium (In) doped Zinc oxide (ZnO) nano particles were synthesized by simple sol-gel technique at low temperature of 70°C. Different compositions of Indium (In) doped zinc oxide with Zn1-xInxO (x=0.01 to 0.08 atomic percent) were prepared by low cost sol-gel technique. The powders were examined for their structural study using XRD. It has been found from diffraction data that the pure and Indium doped powders have formed to be single phase hexagonal wurtzite crystal structure. The microcstrutured parameters such as strain, lattice constant, particle size, dislocation density, bond lengths between Zn and O were calculated. Using the calculated values of particle size from XRD & SEM crystallinity index was estimated. From the observed crystallinity index data of the prepared nano materials it was confirmed that the materials were showing polycrystalline nature.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"60 1","pages":"172-178"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73131169","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609261
Manu Dalela, Harpal Singh, U. Soni, S. Sapra
Core-shell-shell nano rods have been widely investigated as fluorescent biomarkers, due to their photochemical stability and high brightness, which makes them a good alternative to organic fluorophores. There are several unique optical properties that can make nano rods (NRs) potentially more appealing bioimaging probes. Hydrophobic core-shell-shell CdSe/CdS/ZnS nano rods (NRs) were synthesized by successive ion layer adsorption and reaction (SILAR) technique. Synthesized NRs (CdSe/CdS/ZnS) were made water dispersible by ligand exchange with thioglycolic acid and were conjugated with folic acid (FA) using EDC/NHS techniques for targeting human cancer cells expressing folate receptor (FR). The Folate receptor (FR) is ideally suited for this study because it is preferentially expressed with high binding affinity for folic acid in several cancers. In vitro cytotoxicity of the folate-conjugated CdSe/CdS-TGA and CdSe/CdS/ZnS-TGA NRs were investigated also by employing MCF-7 cells (Breast cancer cell line) through the 3-(4,5- dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. This assay shows that core-shell-shell (CdSe/CdS/ZnS) NRs are biocompatible than core- shell (CdSe/CdS) for targeting the cancer cells. The result of MTT viability assay shows that the percentage of living cells gradually decreases for CdSe/CdS rods where as in case of CdSe/CdS/ZnS rods ≥ 80% percentage of cell viability has been observed. These experiments confirms that FA conjugated NRs are preferentially internalized by MCF-7 tumor cells suggesting their potential utility as targeted fluorescent imaging agent for early stage cancer detection. The MTT cell viability assay indicated that covering the CdSe/CdS rods with ZnS shell reduces their cell toxicity.
{"title":"Tumor cell targetting using folate conjugated core/shell CdSe/CdS/ZnS nano rods","authors":"Manu Dalela, Harpal Singh, U. Soni, S. Sapra","doi":"10.1109/ICANMEET.2013.6609261","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609261","url":null,"abstract":"Core-shell-shell nano rods have been widely investigated as fluorescent biomarkers, due to their photochemical stability and high brightness, which makes them a good alternative to organic fluorophores. There are several unique optical properties that can make nano rods (NRs) potentially more appealing bioimaging probes. Hydrophobic core-shell-shell CdSe/CdS/ZnS nano rods (NRs) were synthesized by successive ion layer adsorption and reaction (SILAR) technique. Synthesized NRs (CdSe/CdS/ZnS) were made water dispersible by ligand exchange with thioglycolic acid and were conjugated with folic acid (FA) using EDC/NHS techniques for targeting human cancer cells expressing folate receptor (FR). The Folate receptor (FR) is ideally suited for this study because it is preferentially expressed with high binding affinity for folic acid in several cancers. In vitro cytotoxicity of the folate-conjugated CdSe/CdS-TGA and CdSe/CdS/ZnS-TGA NRs were investigated also by employing MCF-7 cells (Breast cancer cell line) through the 3-(4,5- dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. This assay shows that core-shell-shell (CdSe/CdS/ZnS) NRs are biocompatible than core- shell (CdSe/CdS) for targeting the cancer cells. The result of MTT viability assay shows that the percentage of living cells gradually decreases for CdSe/CdS rods where as in case of CdSe/CdS/ZnS rods ≥ 80% percentage of cell viability has been observed. These experiments confirms that FA conjugated NRs are preferentially internalized by MCF-7 tumor cells suggesting their potential utility as targeted fluorescent imaging agent for early stage cancer detection. The MTT cell viability assay indicated that covering the CdSe/CdS rods with ZnS shell reduces their cell toxicity.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"32 1","pages":"144-147"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76399280","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 : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609314
A. K. Nandi, Arti Pant, Anurag Tripathi, S. Newale, V. Gajbhiye, A. Jadhav, R. Khopade, Hima Prasanth, R. K. Pandey, B. Bhattacharya
Nano iron oxide (α-Fe2O3) exhibits better performance as a burn rate catalyst in composite rocket propellant. A polymer citrate precursor method (a combustion process) was developed (in this laboratory) for large scale synthesis of nanoα-Fe2O3 from starting material iron nitrate. The synthesized nanoα-Fe2O3 wascharacterized for bulk density, powder XRD, BET surface area and HRTEM. Two redox titration methods viz. permanganate and iodometricwere discussed for chemical analysis (assay) of samples. Preliminary study indicates that use of nanoFe2O3in composite propellant formulations resulted in ~ 50% improvement in burn rate.
{"title":"Large scale synthesis and characterization of α-Fe2O3 nanoparticles for propellant applications","authors":"A. K. Nandi, Arti Pant, Anurag Tripathi, S. Newale, V. Gajbhiye, A. Jadhav, R. Khopade, Hima Prasanth, R. K. Pandey, B. Bhattacharya","doi":"10.1109/ICANMEET.2013.6609314","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609314","url":null,"abstract":"Nano iron oxide (α-Fe<sub>2</sub>O<sub>3</sub>) exhibits better performance as a burn rate catalyst in composite rocket propellant. A polymer citrate precursor method (a combustion process) was developed (in this laboratory) for large scale synthesis of nanoα-Fe<sub>2</sub>O<sub>3</sub> from starting material iron nitrate. The synthesized nanoα-Fe<sub>2</sub>O<sub>3</sub> wascharacterized for bulk density, powder XRD, BET surface area and HRTEM. Two redox titration methods viz. permanganate and iodometricwere discussed for chemical analysis (assay) of samples. Preliminary study indicates that use of nanoFe<sub>2</sub>O<sub>3</sub>in composite propellant formulations resulted in ~ 50% improvement in burn rate.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"14 1","pages":"475-480"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75275579","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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