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Journal of Physics C: Solid State Physics最新文献

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Active Matter: Liquid‐Crystal Hydrodynamics With a Difference 活性物质:不同的液晶流体力学
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3605730
S. Ramaswamy
{"title":"Active Matter: Liquid‐Crystal Hydrodynamics With a Difference","authors":"S. Ramaswamy","doi":"10.1063/1.3605730","DOIUrl":"https://doi.org/10.1063/1.3605730","url":null,"abstract":"Coherently moving flocks of beasts, birds and bacteria are an example of polar nematic liquid‐crystalline order in the living world. The highly ordered local structures seen in the configurations of the biopolymeric filaments, energized by molecular motors, in the cytoskeleton of a living cell are another example; and chemically or mechanically agitated orientable particles such as catalytic colloidal rods or monolayers of macroscopic bits of wire are a third. There has been a great deal of progress in understanding the states, phase transitions, and fluctuations of these nonequilibrium systems, known broadly as Active Matter, and the methods used are a nice generalization of the hydrodynamic approach to liquid crystals. Among the interesting results that have emerged are some curious instabilities in bulk as well as thin‐film geometries; the peculiar kinetics of domain growth of active nematics; anomalies in the dynamics of a stiff filament in an active medium, and the twisted instabilities of chiral act...","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"65 1","pages":"27-27"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85029478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Free Volume Size Distribution in Some Natural Polymers 一些天然聚合物的自由体积大小分布
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3605819
M. N. Chandrashekara, C. Ranganathaiah
{"title":"Free Volume Size Distribution in Some Natural Polymers","authors":"M. N. Chandrashekara, C. Ranganathaiah","doi":"10.1063/1.3605819","DOIUrl":"https://doi.org/10.1063/1.3605819","url":null,"abstract":"Positron lifetime technique was used to determine the size distribution of free volume holes in some natural polymers–animal hair, feather, cotton and silk. The effect of fiber swelling on the nature of size distribution was also monitored. The obtained positron lifetime spectra were analyzed by using the computer program CONTIN (PALS‐2). Significant differences in the size distribution were observed for these biological polymers (and even among the different animal hair types), possibly due to the structural differences, which have not been investigated hitherto.","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"85 1","pages":"228-229"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76331626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Ultra Small‐Angle Neutron Scattering Study of Porous Glass 多孔玻璃的超小角中子散射研究
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3605965
Reshma R. Desai, J. Desa, D. Sen, S. Mazumder
{"title":"Ultra Small‐Angle Neutron Scattering Study of Porous Glass","authors":"Reshma R. Desai, J. Desa, D. Sen, S. Mazumder","doi":"10.1063/1.3605965","DOIUrl":"https://doi.org/10.1063/1.3605965","url":null,"abstract":"Compacts of silica micro‐spheres prepared for different times at sintering temperatures of 640 °C and 740 °C have been studied by Ultra Small‐Angle Neutron Scattering (USANS) and Scanning Electron Microscopy (SEM). Stress versus strain measurements display several breakage points related to a range of nearest neighbour coordination around each microsphere.","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"1 1","pages":"527-528"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88638522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Blue Shifts and Refractive Index of Rhodamine 6G doped Polycarbonate 罗丹明6G掺杂聚碳酸酯的蓝移和折射率
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3606353
K. Das, Sheetal Mehta, Rashmi Singh
{"title":"Blue Shifts and Refractive Index of Rhodamine 6G doped Polycarbonate","authors":"K. Das, Sheetal Mehta, Rashmi Singh","doi":"10.1063/1.3606353","DOIUrl":"https://doi.org/10.1063/1.3606353","url":null,"abstract":"UV‐visible absorption studies and refractive index measurements at wavelengths of 458, 492.2 , 499, 546, 589, 632.8 , 659.2, 670.2 nanometers were taken of Rhodamine 6G doped Poly(carbonate) films. The absorption studies on the PC‐ Rhodamine composites showed blue shifts for samples at concentrations of 0.01,0.05,0.1,0.5 % of Rhodamine 6G suggesting the formation of nanoparticles. The optical dispersion of the poly(carbonate) was satisfactorily given by the Schott equation.","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"139 1","pages":"1317-1318"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89026697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Polyaniline/ZnO Heterojunction 聚苯胺/氧化锌异质结
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3606057
B. Sharma, Babu Banothu, N. Khare
{"title":"Polyaniline/ZnO Heterojunction","authors":"B. Sharma, Babu Banothu, N. Khare","doi":"10.1063/1.3606057","DOIUrl":"https://doi.org/10.1063/1.3606057","url":null,"abstract":"Zinc Oxide (ZnO) based heterojunction has been fabricated by spin coating p‐type polymer Polyaniline on n‐type ZnO film. The ZnO film has been deposited by ultrasonically assisted chemical vapor deposition method on patterned Indium Tin Oxide coated glass substrate. Aluminum was deposited on top of the Polyaniline film by thermal evaporation. The current‐voltage (I‐V) characteristic of Polyaniline/ZnO shows diode like behavior. The I‐V characteristic was examined in the frame work of thermionic emission model. The ideality factor and barrier height were obtained as ∼4.0 and ∼0.68 eV respectively.","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"11 1","pages":"713-714"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88737150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Transport and Magnetic Properties of R2Ir3Sn5 (R = La, Ce, Pr, and Nd) System R2Ir3Sn5 (R = La, Ce, Pr, Nd)体系的输运和磁性能
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3606303
N. Sangeetha, A. Thamizhavel, S. Basu, S. Ramakrishnan, D. Pal
{"title":"Transport and Magnetic Properties of R2Ir3Sn5 (R = La, Ce, Pr, and Nd) System","authors":"N. Sangeetha, A. Thamizhavel, S. Basu, S. Ramakrishnan, D. Pal","doi":"10.1063/1.3606303","DOIUrl":"https://doi.org/10.1063/1.3606303","url":null,"abstract":"We report here transport and magnetic properties of the R2Ir3Sn5 (R = La, Ce, Pr, Nd) system. R2Ir3Sn5 (R = Ce to Nd) crystallizes in orthorhombic structure (Cmc21) while La2Ir3Sn5 forms in orthorhombic U2Co3Si5 (Ibam) structure. Ce2Ir3Sn5 depicts Kondo behavior (Kondo temperature, TK = 271 K) accompanied with an antiferromagnetic ordering at 3.5 K. Studies on Pr2Ir3Sn5 and Nd2Ir3Sn5 indicate magnetic ordering below 5 K.","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"3 1","pages":"1215-1216"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89865355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Morphology Dependent Photocatalytic Properties of ZnO Nanostructures ZnO纳米结构光催化性能的形貌依赖性研究
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3605919
K. Ranjith, R. Kumar
{"title":"Morphology Dependent Photocatalytic Properties of ZnO Nanostructures","authors":"K. Ranjith, R. Kumar","doi":"10.1063/1.3605919","DOIUrl":"https://doi.org/10.1063/1.3605919","url":null,"abstract":"ZnO nanostructures of different morphology (Rods, spindles, stars, buds) were successfully synthesized by co‐precipitation method. The prepared ZnO nanostructures were systematically characterized by X‐ray diffraction, Scanning electron microscopy (SEM). XRD results show the prepared nanostructures were in the hexagonal wurtzite structure. The photocatalytic degradation of methylene blue (MB) in aqueous solution under UV‐irradiation was investigated with different ZnO nanostructures. The photocatalytic experiments reveal that spindle like nanostructures showed fast photocatalytic activity compared to the other rods, stars and buds like nanostructures.","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"112 1","pages":"431-432"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79547353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Study on the low‐temperature properties of pyrochlores Gd2Hf2O7 and Gd2Zr2O7, using crystal‐field theory 用晶体场理论研究焦绿石Gd2Hf2O7和Gd2Zr2O7的低温性质
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3606256
A. A. Biswas, Y. Jana
{"title":"Study on the low‐temperature properties of pyrochlores Gd2Hf2O7 and Gd2Zr2O7, using crystal‐field theory","authors":"A. A. Biswas, Y. Jana","doi":"10.1063/1.3606256","DOIUrl":"https://doi.org/10.1063/1.3606256","url":null,"abstract":"The geometrically frustrated pyrochlores Gd2Hf2O7 (GdH) and Gd2Zr2O7 (GdZ) are easy planar anisotropic systems in which considerable single‐ion crystal‐field anisotropies of D3d symmetry are found in the ground multiplet 8S7/2 due to admixture of higher Russell‐Saunders terms. The 8S7/2 splits into 4 doublets with total CF splitting 9.9 K in GdH and 9.4 K in GdZ. The magnetic specific heat Cmag follows a conventional T3 behavior in GdH and an unconventional T4.6 behavior in GdZ down to 0.4 K.","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"27 1","pages":"1121-1122"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83195468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Improved H2S and Cl2 Sensing Characteristics of Pure and Au Incorporated WO3 Thin Films 纯和金掺杂WO3薄膜对H2S和Cl2传感特性的改进
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3606040
N. Ramgir, S. Ganapathi, M. Kaur, S. Mishra, N. Datta, D. K. Aswal, S. Gupta, J. Yakhmi
{"title":"Improved H2S and Cl2 Sensing Characteristics of Pure and Au Incorporated WO3 Thin Films","authors":"N. Ramgir, S. Ganapathi, M. Kaur, S. Mishra, N. Datta, D. K. Aswal, S. Gupta, J. Yakhmi","doi":"10.1063/1.3606040","DOIUrl":"https://doi.org/10.1063/1.3606040","url":null,"abstract":"Gas sensing properties of pure and Au incorporated WO3 thin films towards H2S and Cl2 have been investigated. The sensor films were able to detect H2S and Cl2 selectively at an operating temperature of 150 and 200 °C, respectively. Effect of gas concentration and Au loading have been investigated and correlated with the observed sensitivity values. Pure WO3 films exhibited better sensing characteristics towards H2S (S = 17, 10 ppm, 150 °C) while sensor film containing Au thickness of 21.6 nm exhibited a maximum sensitivity towards Cl2 (S = 89, 10 ppm, 200 °C)..","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"320 1","pages":"679-680"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76461508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Fabrication and Electrical Properties of Transparent n‐ZnO:Al‐p‐NiO:Li Junction 透明n - ZnO:Al - p - NiO:Li结的制备及其电性能
Journal of Physics C: Solid State Physics Pub Date : 2011-07-11 DOI: 10.1063/1.3606063
J. Mistry, B. V. Mistry, U. Trivedi, R. Pinto, U. Joshi
{"title":"Fabrication and Electrical Properties of Transparent n‐ZnO:Al‐p‐NiO:Li Junction","authors":"J. Mistry, B. V. Mistry, U. Trivedi, R. Pinto, U. Joshi","doi":"10.1063/1.3606063","DOIUrl":"https://doi.org/10.1063/1.3606063","url":null,"abstract":"Transparent all oxide p‐n junction thin film diode nanostructures consisting of n‐type ZnO:Al and p‐type NiO was fabricated by pulsed laser deposition onto c‐sapphire substrate. Details of device fabrication will be presented. Combined GIXRD and AFM results confirm phase pure, mono‐dispersed 30 nm ZnO:Al and NiO:Li nanocrystallites with RMS roughness of the films were controlled to be that of NiO unit cell parameter. Better than 70% optical transparency is achieved across the 180 nm thick p‐n junction. The optical band gap across the junction was found to decrease as compare to the ITO and NiO. The current voltage (I‐V) characteristics show excellent rectifying characteristics with dynamic transfer resistance of the order of 104 in the forward bias condition. The observed rectifying I‐V properties were reproducible for several voltage sweeping cycles. The optical and electrical properties of oxide transparent diode offer variety of applications in oxide electronics and photonics.","PeriodicalId":16850,"journal":{"name":"Journal of Physics C: Solid State Physics","volume":"8 1","pages":"725-726"},"PeriodicalIF":0.0,"publicationDate":"2011-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83655013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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