Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609234
N. Raj, J. Brijitta, D. Ramachandran, A. M. Rabel, V. Jayanthi
In this paper, we report the synthesis of anisotropic Matryoshka doll-like silica particle. These particles possess a head and a body, the head region being flexible. The head is spherical with diameter of 500 ± 63nm and body length of 800 ± 90nm.
{"title":"Synthesis and characterization of Matryoshka doll-like silica nanoparticles","authors":"N. Raj, J. Brijitta, D. Ramachandran, A. M. Rabel, V. Jayanthi","doi":"10.1109/ICANMEET.2013.6609234","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609234","url":null,"abstract":"In this paper, we report the synthesis of anisotropic Matryoshka doll-like silica particle. These particles possess a head and a body, the head region being flexible. The head is spherical with diameter of 500 ± 63nm and body length of 800 ± 90nm.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"2 1","pages":"61-62"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76104169","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.2013.6609309
Saravanan K. Gobi, R. Ananthakumar, B. Subramaniam, S. Maruthamuthu, M. Jayachandran
Single and multi layer TiN, TiO2 thin films were deposited by DC magnetron sputtering technique using a mixture of Ar as sputtering gas O2, N2 as a reactive gases. The hard coatings deposited by PVD methods can have different phases and grain structures which is generally composed of columnar crystals from the transition layer to the coating surfaces. Results from the electrochemical polarization and impedance studies showed the favorable behavior of the TiN, which have improved the corrosion resistance property followed by TiN/TiO2 multilayer, TiO2 and uncoated 316L SS in presence of artificial blood plasma with and without addition of amino acids. Hemocompatibility was performed to analyze the materials biocompatibility. Coated thin films showed better compatibility than uncoated films. TiO2 exhibited highly hydrophilic in nature than other films. These nanostructure coatings were confirmed by XRD and AFM.
{"title":"Anodic corrosion behavior of nanostructured TiN, TiO2 single layer and TiN/TiO2 multilayer coated 316L SS","authors":"Saravanan K. Gobi, R. Ananthakumar, B. Subramaniam, S. Maruthamuthu, M. Jayachandran","doi":"10.1109/ICANMEET.2013.6609309","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609309","url":null,"abstract":"Single and multi layer TiN, TiO2 thin films were deposited by DC magnetron sputtering technique using a mixture of Ar as sputtering gas O2, N2 as a reactive gases. The hard coatings deposited by PVD methods can have different phases and grain structures which is generally composed of columnar crystals from the transition layer to the coating surfaces. Results from the electrochemical polarization and impedance studies showed the favorable behavior of the TiN, which have improved the corrosion resistance property followed by TiN/TiO2 multilayer, TiO2 and uncoated 316L SS in presence of artificial blood plasma with and without addition of amino acids. Hemocompatibility was performed to analyze the materials biocompatibility. Coated thin films showed better compatibility than uncoated films. TiO2 exhibited highly hydrophilic in nature than other films. These nanostructure coatings were confirmed by XRD and AFM.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"70 1","pages":"331-334"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73874944","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.2013.6609226
C. Manoharan, G. Kiruthigaa, S. Dhanapandian, K. Kumar, M. Jothibas
Nanometer sized SnS2 flakes were prepared by solid state reaction between tin chloride and thiourea in air at 275°C. The structural and optical properties of the resultant products were characterized by means of X-ray diffraction (XRD), scanning electron microscopy with energy dispersive spectroscopy (SEM with EDS), atomic force microscopy (AFM), UV-Vis absorption and photoluminescence spectroscopy. The X-ray diffraction (XRD) pattern of the as-prepared sample was indexed to the hexagonal phase of SnS2 and the crystallite size was found to be 21.12nm. Energy dispersive X-ray analysis indicated that the elemental ratio was close to those for tin disulphide (SnS2.04). The blue shift in the absorption edge was observed from the UV-Vis spectrum and the band gap was found to be 3.03eV. The Photoluminescence spectra showed two strong peaks corresponding to green and red emission.
采用氯化锡与硫脲在275℃空气中固相反应制备了纳米SnS2薄片。采用x射线衍射(XRD)、能谱扫描电镜(SEM with EDS)、原子力显微镜(AFM)、紫外-可见吸收光谱和光致发光光谱对产物的结构和光学性质进行了表征。制备的样品的x射线衍射(XRD)图谱显示为SnS2的六方相，晶粒尺寸为21.12nm。能量色散x射线分析表明，元素比接近于二硫化锡(SnS2.04)的元素比。紫外可见光谱观察到吸收边出现蓝移，带隙为3.03eV。光致发光光谱显示两个强峰，对应于绿色和红色发射。
{"title":"Preparation and characterization of nano structured SnS2 by solid state reaction method","authors":"C. Manoharan, G. Kiruthigaa, S. Dhanapandian, K. Kumar, M. Jothibas","doi":"10.1109/ICANMEET.2013.6609226","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609226","url":null,"abstract":"Nanometer sized SnS2 flakes were prepared by solid state reaction between tin chloride and thiourea in air at 275°C. The structural and optical properties of the resultant products were characterized by means of X-ray diffraction (XRD), scanning electron microscopy with energy dispersive spectroscopy (SEM with EDS), atomic force microscopy (AFM), UV-Vis absorption and photoluminescence spectroscopy. The X-ray diffraction (XRD) pattern of the as-prepared sample was indexed to the hexagonal phase of SnS2 and the crystallite size was found to be 21.12nm. Energy dispersive X-ray analysis indicated that the elemental ratio was close to those for tin disulphide (SnS2.04). The blue shift in the absorption edge was observed from the UV-Vis spectrum and the band gap was found to be 3.03eV. The Photoluminescence spectra showed two strong peaks corresponding to green and red emission.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"8 1","pages":"30-33"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85732152","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.2013.6609307
V. Pandey, R. Dusane
Present work provides a comprehensive study on Aluminum induced crystallization (AIC) of Hot Wire Chemical Vapour Deposited (HWCVD) a-Si:H. Different parameters, namely, layer sequence, annealing temperature and time, were studied to correlate their impact on the quality of nc-Si:H films obtained by AIC. Device quality nc-Si:H thin films at a very low temperature of 473 K were obtained for the layer sequence of substrate/a-Si:H/Al.
{"title":"Low temperature aluminum induced crystallization of HWCVD deposited a-Si:H","authors":"V. Pandey, R. Dusane","doi":"10.1109/ICANMEET.2013.6609307","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609307","url":null,"abstract":"Present work provides a comprehensive study on Aluminum induced crystallization (AIC) of Hot Wire Chemical Vapour Deposited (HWCVD) a-Si:H. Different parameters, namely, layer sequence, annealing temperature and time, were studied to correlate their impact on the quality of nc-Si:H films obtained by AIC. Device quality nc-Si:H thin films at a very low temperature of 473 K were obtained for the layer sequence of substrate/a-Si:H/Al.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"245 1","pages":"357-359"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72869366","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.2013.6609266
C. Jayachandraiah, A. Divya, K. Siva Kumar, G. Krishnaiah
Polyvinylpyrrolidone capped ZnO and Nd (0.5 and 1 at.%) ZnO nanoparticles have been prepared by chemical co-precipitation method in aqueous media. The as-prepared nanoparticles were subjected to compositional, structural, morphological and photoluminescence studies. EDS confirmed the presence of Nd element in ZnO nanoparticles. X-ray diffraction patterns and TEM studies established that pristine and Nd doped ZnO nanoparticles exhibited wurtzite crystal structure. The average particle size obtained from the XRD and TEM were in good agreement with each other. Photoluminescence studies on Nd doping amplify the defect related emission.
{"title":"Effect of Nd on structural and optical properties of Nd doped ZnO nanoparticles","authors":"C. Jayachandraiah, A. Divya, K. Siva Kumar, G. Krishnaiah","doi":"10.1109/ICANMEET.2013.6609266","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609266","url":null,"abstract":"Polyvinylpyrrolidone capped ZnO and Nd (0.5 and 1 at.%) ZnO nanoparticles have been prepared by chemical co-precipitation method in aqueous media. The as-prepared nanoparticles were subjected to compositional, structural, morphological and photoluminescence studies. EDS confirmed the presence of Nd element in ZnO nanoparticles. X-ray diffraction patterns and TEM studies established that pristine and Nd doped ZnO nanoparticles exhibited wurtzite crystal structure. The average particle size obtained from the XRD and TEM were in good agreement with each other. Photoluminescence studies on Nd doping amplify the defect related emission.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"17 1","pages":"160-162"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72931810","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.2013.6609248
T. Rajmohan, Y. D. Bharadwaz, N. Thirumurugun, G. Harish
The application of nano-sized particles is increasing since it strengthens the Metal Matrix composites (MMC) and maintains the ductility of the matrix alloy. The present investigation deals optimization of sintering parameters of hybrid aluminum matrix reinforced with micro SiC particles, and nano copper oxide (CuO) particles. Experiments have been performed under different conditions of temperature, nano CuO content, and compacting pressure. Powder mixtures were compacted at a pressure ranging from 55 to 65 N/m2. The green compacts were sintered at temperatures between 550 and 600°C. Full factorial design was used to investigate the sintering process parameters. Optimization was carried out using response surface modeling based desirability analysis. Experimental results indicate that multi-response characteristics such as Tensile strength, density and micro hardness can be improved effectively through desirability analysis.
{"title":"Multi response optimization of sintering parameters of nano copper oxide reinforced Metal Matrix composites","authors":"T. Rajmohan, Y. D. Bharadwaz, N. Thirumurugun, G. Harish","doi":"10.1109/ICANMEET.2013.6609248","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609248","url":null,"abstract":"The application of nano-sized particles is increasing since it strengthens the Metal Matrix composites (MMC) and maintains the ductility of the matrix alloy. The present investigation deals optimization of sintering parameters of hybrid aluminum matrix reinforced with micro SiC particles, and nano copper oxide (CuO) particles. Experiments have been performed under different conditions of temperature, nano CuO content, and compacting pressure. Powder mixtures were compacted at a pressure ranging from 55 to 65 N/m2. The green compacts were sintered at temperatures between 550 and 600°C. Full factorial design was used to investigate the sintering process parameters. Optimization was carried out using response surface modeling based desirability analysis. Experimental results indicate that multi-response characteristics such as Tensile strength, density and micro hardness can be improved effectively through desirability analysis.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"32 1","pages":"116-119"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73122866","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.2013.6609280
P. Sharma, N. Ramgir, C. P. Goyal, N. Datta, S. Srivastava, M. Kaur, A. Debnath, D. K. Aswal, Y. K. Vijay, S. Gupta
Gas sensing properties of pure and surface modified ZnO nanowires towards H2S gas have been investigated. The hydrothermally grown ZnO nanowires network has been selectively modified with various sensitizers using RF sputtering to generate a 2×7 sensor array. After fabrication, the sensor array device has been investigated for its gas sensing properties. The optimal temperature for H2S sensing has been observed to be 300°C. The maximum sensor response of S=52 was obtained for Au5.7at% modified ZnO NWs with response and recovery times of 22 sec and 52 min, respectively. Concentration profile at 300°C revealed the same pattern with change in amplitude by changing H2S concentration. The sensor array was able to detect H2S both qualitatively and quantitatively based on the graphical pattern and position of the pattern, respectively.
{"title":"Effect of sensitizers on H2S sensing properties of ZnO nanowires","authors":"P. Sharma, N. Ramgir, C. P. Goyal, N. Datta, S. Srivastava, M. Kaur, A. Debnath, D. K. Aswal, Y. K. Vijay, S. Gupta","doi":"10.1109/ICANMEET.2013.6609280","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609280","url":null,"abstract":"Gas sensing properties of pure and surface modified ZnO nanowires towards H2S gas have been investigated. The hydrothermally grown ZnO nanowires network has been selectively modified with various sensitizers using RF sputtering to generate a 2×7 sensor array. After fabrication, the sensor array device has been investigated for its gas sensing properties. The optimal temperature for H2S sensing has been observed to be 300°C. The maximum sensor response of S=52 was obtained for Au5.7at% modified ZnO NWs with response and recovery times of 22 sec and 52 min, respectively. Concentration profile at 300°C revealed the same pattern with change in amplitude by changing H2S concentration. The sensor array was able to detect H2S both qualitatively and quantitatively based on the graphical pattern and position of the pattern, respectively.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"37 1","pages":"215-217"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75999642","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.2013.6609270
K. Gobi Saravanan, R. Anatha Kumar, D. Ramachandran, T. Shyju, V. Vishwakarma, Sang-jae Kim, P. Kuppusami
Bilayer and alloyed thin films of Cu-Ni were successfully prepared by RF magnetron sputtering method. XRD analysis showed polycrystalline film with preferred orientation for both bilayer and alloyed thin films. Nanograins were observed by FESEM. The results of electrochemical experiments indicated that the alloyed films exhibited superior corrosion resistance followed by bilayer and bare 316L stainless steel in 3.5% NaCl solution.
{"title":"Structural and corrosion behaviour of bilayer and alloyed films of Cu-Ni","authors":"K. Gobi Saravanan, R. Anatha Kumar, D. Ramachandran, T. Shyju, V. Vishwakarma, Sang-jae Kim, P. Kuppusami","doi":"10.1109/ICANMEET.2013.6609270","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609270","url":null,"abstract":"Bilayer and alloyed thin films of Cu-Ni were successfully prepared by RF magnetron sputtering method. XRD analysis showed polycrystalline film with preferred orientation for both bilayer and alloyed thin films. Nanograins were observed by FESEM. The results of electrochemical experiments indicated that the alloyed films exhibited superior corrosion resistance followed by bilayer and bare 316L stainless steel in 3.5% NaCl solution.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"22 1","pages":"179-180"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73825603","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.2013.6609308
S. Gunjal, Y. Khollam, R. R. Udawant, S. Jadkar, P. Shelke, J. Sali, K. Mohite
The p-CdTe films are prepared on thoroughly cleaned glass substrates by using ultrasonic spray pyrolysis techniques in-situ reducing atmosphere with air-ambient at 548 and 573 K. The resultant films are characterized by using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray (EDAX) analysis, UV-Visible spectroscopy and Hall measurement set-up. The characterization studies revealed crystallization of the main p-CdTe phase with minor oxidation corresponding to TeO2 in resultant films. The uniform size distribution of spherical particles with average particle size = 0.2 μm is noted from SEM studies. The optical properties are found to be absorbance (α) = 0.80 and band gap (Eg) = 1.46 eV for the films prepared at 573 K. The less oxidation at higher processing temperature realized in XRD and EDAX studies might be due to higher crystallization rate of p-CdTe dominating the oxidation. The Hall coefficient, RH = 0.0205 × 104 cm3/C, resistivity, r = 0.5812 × 102 Ω-cm and negative current value in Hot probe experiment indicated p-type semiconductor nature of resultant films processed at 573 K. The higher concentration (n), and less mobility (μ) of majority charge carriers for the films processed at 573 K might be due to less oxidation at higher temperature.
{"title":"Optical and electrical properties of ultrasonic spray pyrolysized p-CdTe films","authors":"S. Gunjal, Y. Khollam, R. R. Udawant, S. Jadkar, P. Shelke, J. Sali, K. Mohite","doi":"10.1109/ICANMEET.2013.6609308","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609308","url":null,"abstract":"The p-CdTe films are prepared on thoroughly cleaned glass substrates by using ultrasonic spray pyrolysis techniques in-situ reducing atmosphere with air-ambient at 548 and 573 K. The resultant films are characterized by using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray (EDAX) analysis, UV-Visible spectroscopy and Hall measurement set-up. The characterization studies revealed crystallization of the main p-CdTe phase with minor oxidation corresponding to TeO2 in resultant films. The uniform size distribution of spherical particles with average particle size = 0.2 μm is noted from SEM studies. The optical properties are found to be absorbance (α) = 0.80 and band gap (Eg) = 1.46 eV for the films prepared at 573 K. The less oxidation at higher processing temperature realized in XRD and EDAX studies might be due to higher crystallization rate of p-CdTe dominating the oxidation. The Hall coefficient, RH = 0.0205 × 104 cm3/C, resistivity, r = 0.5812 × 102 Ω-cm and negative current value in Hot probe experiment indicated p-type semiconductor nature of resultant films processed at 573 K. The higher concentration (n), and less mobility (μ) of majority charge carriers for the films processed at 573 K might be due to less oxidation at higher temperature.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"114 1","pages":"360-362"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77764951","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.2013.6609299
G. J. Christobel, C. Mahadevan
In the past decade, II-VI semiconductor nanoparticles attract much attention because of their size-dependent (and thus tunable) photo- and electro- luminescence properties and promising applications in optoelectronics. In this work we report on the synthesis of ZnS-ZnO semiconductor nanocomposites by noval and simple solvothermal method. The prepared nancomposites of different ratios were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), UV-VIS absorption, Photoluminescence (PL) spectra and Photoconductivity (PC). X-ray diffraction (XRD) study confirmed the formation of multiphase of ZnS- ZnO nanocrystals . The calculated grain sizes using the Scherrer formula were found to be less than 4.5nm match with the SEM results. The UV-VIS absorption spectra show that the absorption edges of all nanocrystals fall within 310 to 350nm which explains a blue shift in wavelength corresponding to bulk.. Photoluminescence spectra of the nanocomposites exhibit five prominent peaks in the PL spectra. The peaks are observed at around 408, 446, 486, 490 and 530nm.
{"title":"Luminescence properties of ZnS-ZnO nanocomposites synthesized by solvothermal method","authors":"G. J. Christobel, C. Mahadevan","doi":"10.1109/ICANMEET.2013.6609299","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609299","url":null,"abstract":"In the past decade, II-VI semiconductor nanoparticles attract much attention because of their size-dependent (and thus tunable) photo- and electro- luminescence properties and promising applications in optoelectronics. In this work we report on the synthesis of ZnS-ZnO semiconductor nanocomposites by noval and simple solvothermal method. The prepared nancomposites of different ratios were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), UV-VIS absorption, Photoluminescence (PL) spectra and Photoconductivity (PC). X-ray diffraction (XRD) study confirmed the formation of multiphase of ZnS- ZnO nanocrystals . The calculated grain sizes using the Scherrer formula were found to be less than 4.5nm match with the SEM results. The UV-VIS absorption spectra show that the absorption edges of all nanocrystals fall within 310 to 350nm which explains a blue shift in wavelength corresponding to bulk.. Photoluminescence spectra of the nanocomposites exhibit five prominent peaks in the PL spectra. The peaks are observed at around 408, 446, 486, 490 and 530nm.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"7 5 1","pages":"309-312"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85651475","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：