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9th International Symposium on Electrets (ISE 9) Proceedings最新文献

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Dielectric changes precede hydrogen bond breakage during helix to coil transition of deoxyribonucleic acid 在脱氧核糖核酸螺旋向线圈转变过程中，介电变化先于氢键断裂
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578201
A. Georgakilas, K.S. Haveles, A. Konsta, E. Sideris
{"title":"Dielectric changes precede hydrogen bond breakage during helix to coil transition of deoxyribonucleic acid","authors":"A. Georgakilas, K.S. Haveles, A. Konsta, E. Sideris","doi":"10.1109/ISE.1996.578201","DOIUrl":"https://doi.org/10.1109/ISE.1996.578201","url":null,"abstract":"An interesting and simultaneously unexpected thermodynamic stability of the DNA helix was observed when studying the effects of exposure to /spl gamma/- and /spl alpha/-irradiation on the double helix to coil thermal transition phase of mammalian macromolecular DNA. The results show that at the low dose range, of 0 to 12 Gy, which is of importance for radiation biology and where the effects of exposure to ionizing radiation were not explored in the previously published work, an increase of the dose of ionizing radiation results in an increase of the thermodynamic stability as well as in an increase of the apparent molecular weight of the DNA macromolecules. In all cases conductivity changes precede by a /spl Delta/T of about 3/spl deg/C the helix to coil transition changes, as those are measured by the breakage of the intramolecular hydrogen bonds. This /spl Delta/T is independent of the effected molecular weight changes.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130285871","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
Numerical study of space charge dispersive transport in non-polar electrets 非极性驻极体中空间电荷色散输运的数值研究
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578059
Yang Cao, Z. Xia, Gang Yuan, Hongyan Zhang, Huamao Lin, Jianwei Zhu
{"title":"Numerical study of space charge dispersive transport in non-polar electrets","authors":"Yang Cao, Z. Xia, Gang Yuan, Hongyan Zhang, Huamao Lin, Jianwei Zhu","doi":"10.1109/ISE.1996.578059","DOIUrl":"https://doi.org/10.1109/ISE.1996.578059","url":null,"abstract":"The space-charge dispersive transport in non-polar electrets is studied numerically and experimentally. The dynamics are investigated through continuous-time random walks by Monte Carlo simulation. The stepping-time density of Montroll (/spl psi/(t)/spl prop/t/sup -1-/spl alpha//) is applied for computation. By keeping the temperature at each stepping interval, charge transport under isothermal conditions is studied to simulate the real charge decay process in non-polar electrets aged at fixed temperatures. Experiments on polypropylene film electrets were carried out for comparison. Samples were constant-voltage corona charged at RT for 10 minutes and then aged at various selected temperatures for given time periods. The mean charge depth was measured for comparison to numerical results by means of heat pulse technique. Experimental results of other non-polar electrets are also given to support our model.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122853029","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
Preparation of the piezoelectric composite film PI/PZT 压电复合薄膜PI/PZT的制备
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578249
Zhiming Wu, Yadong Jiang, D. Yang, Li Wang, Dan Li, Xiangdong Chen
{"title":"Preparation of the piezoelectric composite film PI/PZT","authors":"Zhiming Wu, Yadong Jiang, D. Yang, Li Wang, Dan Li, Xiangdong Chen","doi":"10.1109/ISE.1996.578249","DOIUrl":"https://doi.org/10.1109/ISE.1996.578249","url":null,"abstract":"The PI/PZT Composite piezoelectric film has been prepared, the PZT powders are obtained by method of Sol-Gel. The influence of coupling agent on the composite film has been discussed. The surface micrograph of the composite film has been analysed by SEM. As PI has high insulation, the PI/PZT compound will increase the polarizing electric intensity and the polarization along a direction in polarizing process. That makes the piezoelectricity of the composite film increased.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115827544","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
Electret behavior of PET films in various stages of production PET薄膜在不同生产阶段的驻极体行为
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578069
G. Yang, G. Sessler, H. Muller, W. Roth
{"title":"Electret behavior of PET films in various stages of production","authors":"G. Yang, G. Sessler, H. Muller, W. Roth","doi":"10.1109/ISE.1996.578069","DOIUrl":"https://doi.org/10.1109/ISE.1996.578069","url":null,"abstract":"Based on thermally-stimulated current (TSC), laser-induced pressure pulse (LIPP), and isothermal charge decay (ICD) measurements of PET films in various stages of production, we discuss charge accumulation and dipole orientation introduced by the production process and subsequent positive or negative corona charging of such PET films. In the prefilms and in the final films, negative charge is more stable than positive charge. Negative charge is generally injected into both sample surfaces by a pinning process and by contact electrification during the production process, where the film is running over metal and other rollers. The TSC depolarization temperatures are about 80/spl deg/C for the polarization, 90 to 130/spl deg/C for positive charges and 110 to 140/spl deg/C for negative charges.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115642776","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
Preparation and properties of organic polymer sub-micrometer function films 有机高分子亚微米功能膜的制备与性能研究
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578190
Yadong Jiang, D. Yang, Zhiming Wu, Sahohong Wang
{"title":"Preparation and properties of organic polymer sub-micrometer function films","authors":"Yadong Jiang, D. Yang, Zhiming Wu, Sahohong Wang","doi":"10.1109/ISE.1996.578190","DOIUrl":"https://doi.org/10.1109/ISE.1996.578190","url":null,"abstract":"Two methods for preparing organic polymer sub-micrometer thin films, electropolymerization and low pressure chemical vapor deposition, are discussed. The influences of the mononer concentration, the electrolytic concentration, the current density and the electrolytic time on polypyrrole sub-micrometer thin films are studied. In addition, the influences of the driving voltage, oxide concentration and solvent are discussed for LPCVD polypyrrole films. The NH/sub 3/-sensing properties of films of different thickness are tested and studied. The molecular structure of polypyrrole and microstructure of films are analysed by elemental analysis and FT-IR. The NH/sub 3/-sensing mechanism is discussed.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114726652","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
Hopping current and charge storage in polymer electret 聚合物驻极体中的跳流与电荷存储
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578041
Ouyang Yi, F.D. Xu, X.S. Xie, D.H. Zhu
{"title":"Hopping current and charge storage in polymer electret","authors":"Ouyang Yi, F.D. Xu, X.S. Xie, D.H. Zhu","doi":"10.1109/ISE.1996.578041","DOIUrl":"https://doi.org/10.1109/ISE.1996.578041","url":null,"abstract":"In this paper, the formulas of hopping current in polymer and polymer electret are derived. By these formulas, a theoretical discharge equation of polymer electret can be derived. The step-size of hopping electrons, calculated from the isothermal decay data of electrets, are about 10/sup -8/ m. The average size of crystalline regions in polymers are also 10/sup -8/ m in order. This supports the above equations experimentally. All the facts and points in this paper support the suggestion that firmly stored charges are almost trapped in the bands of crystalline regions of electret.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127364758","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
Influence of electron beam irradiation on TSC of polyetheretherketone 电子束辐照对聚醚醚酮TSC的影响
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578147
K. Shinyama, S. Fujita, M. Baba, T. Suzuki
{"title":"Influence of electron beam irradiation on TSC of polyetheretherketone","authors":"K. Shinyama, S. Fujita, M. Baba, T. Suzuki","doi":"10.1109/ISE.1996.578147","DOIUrl":"https://doi.org/10.1109/ISE.1996.578147","url":null,"abstract":"Thermally stimulated current (TSC) properties of unirradiated and electron beam irradiated polyetheretherketone (PEEK) were investigated. In the case of the biasing voltage application, peaks of TSC of unirradiated and irradiated specimen appeared between 120/spl deg/C and 180/spl deg/C. The peak value increased with increasing the biasing voltage. The peak temperature shifted to higher temperature with increasing the biasing temperature. The peak temperature increased with increasing the dose in spite of the biasing voltage value. The peak value of the biasing temperature of 100/spl deg/C and 140/spl deg/C did not change very much between 0 Gy to 100 MGy. However, in the case of 180/spl deg/C, the peak value showed the maximum at 50 MGy. The crosslinking caused by an electron beam irradiation affected the peak temperature and the peak value of TSC.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"283 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127482846","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
Structure of nanocrystalline powder and thin films of lead lanthanum titanate prepared by the sol-gel process 溶胶-凝胶法制备钛酸铅镧纳米晶粉末及薄膜结构
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578186
Q.F. Zhou, H. Chan, Q.Q. Zhang, C. Choy
{"title":"Structure of nanocrystalline powder and thin films of lead lanthanum titanate prepared by the sol-gel process","authors":"Q.F. Zhou, H. Chan, Q.Q. Zhang, C. Choy","doi":"10.1109/ISE.1996.578186","DOIUrl":"https://doi.org/10.1109/ISE.1996.578186","url":null,"abstract":"Ultrafine powders and thin films of lead lanthanum titanate (PLT) were prepared by the sol-gel process. The structural variation of the powder with increasing annealing temperature was monitored by differential thermal analysis, thermogravimetric analysis and X-ray diffraction. The lowest temperature for the formation of nanocrystals in the powder was found to be about 500/spl deg/C. Crystallites of various sizes were obtained by controlling the annealing temperature and time. Thin films of PLT were fabricated by spin casting the sol-gel solution onto Si(111) substrates and the microstructure was analyzed using a scanning electron microscope. By controlling the concentration of the precursor and the processing temperature, PLT thin films with uniform crystallite size could be prepared.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126554350","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
Application of hydrothermal mechanism for tailor-making perovskite titanate films 水热机制在钛酸钙钛矿薄膜定制中的应用
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578177
W-ping Xu, Lirong Zheng, H. Xin, M. Okuyama, Chenglu Lin
{"title":"Application of hydrothermal mechanism for tailor-making perovskite titanate films","authors":"W-ping Xu, Lirong Zheng, H. Xin, M. Okuyama, Chenglu Lin","doi":"10.1109/ISE.1996.578177","DOIUrl":"https://doi.org/10.1109/ISE.1996.578177","url":null,"abstract":"In this paper, the hydrothermal preparation mechanism for BaTiO/sub 3/ films formed on Ti-covered silicon substrates was successfully applied to the preparation of other titanate films. As the result, [110]-oriented BaTiO/sub 3/ films and epitaxial PbTiO/sub 3/ films were hydrothermally grown on TiO/sub 2//Si and SrTiO/sub 3/ substrates, respectively. Finally, a method combining the hydrothermal process with sol-gel method was positively recommended and realized in the synthesis of perovskite PZT(52/48) films.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126588908","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
On the charge density measured by the capacitive probe 论电容式探头测得的电荷密度
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578074
Z. Fang
{"title":"On the charge density measured by the capacitive probe","authors":"Z. Fang","doi":"10.1109/ISE.1996.578074","DOIUrl":"https://doi.org/10.1109/ISE.1996.578074","url":null,"abstract":"In investigation on behaviour of excess charge on an electric insulator, a capacitive probe is usually used to detect this charge. The relation between response of the probe and the excess charge density varies with the shape of the insulator. For very thin film, the record of the probe is 1//spl epsiv//sub r/ times of the excess charge density; and 2/spl epsiv//sub 0//(/spl epsiv//sub 0/+/spl epsiv//sub 1/) times of the excess charge density for thick slab. In the case of right cylindrical spacer, the response of the probe is equal to the excess charge density when its distribution on the circumference is uniform.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123658487","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
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