M. N. Zhuravleva, K. V. Zapsis, J. Konyukhova, I. D. Kosobudsky, V. Kochubey, N. M. Ushakov
{"title":"Structure properties of copper-containing nanoparticles in polyethylene matrix","authors":"M. N. Zhuravleva, K. V. Zapsis, J. Konyukhova, I. D. Kosobudsky, V. Kochubey, N. M. Ushakov","doi":"10.1117/12.793851","DOIUrl":"https://doi.org/10.1117/12.793851","url":null,"abstract":"Copper-containing nanoparticles synthesized in high-pressure polyethylene matrix by the method of thermal decomposition of (CH3COO)2Cu H2O are presented. Average dimensions of nanoparticles and size distribution were determined by transmission electron microscopy and X-ray phase analysis. It was shown that, with increasing copper concentration, the nanoparticles increase in size from 6 to 18 nm. The structure of copper-containing nanoparticles was determined by the method of EXAFS spectroscopy in fluorescence mode and in transmission one. It was shown that the samples containing 3 wt% and 5 wt% of copper are most likely to include CuO particles with tenorite structure. When the copper concentration is increased to 10 wt%, the nanoparticles contain Cu2O and metallic copper phases. An increase in copper concentration to 40 wt% results in complication of the composition and the structure of the particles.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116045293","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}
{"title":"Numerical calculations of a high power CW CO2 gas-dynamic laser","authors":"S. Al‐Hawat, K. Al-Mutaib","doi":"10.1117/12.793392","DOIUrl":"https://doi.org/10.1117/12.793392","url":null,"abstract":"Numerical solution of gas-dynamic laser equations in a gas mixture CO2:N2:H2O was carried out, using five-temperature-model (one translational and four vibrational temperatures) by a computational program written in FORTRAN. The spatial distributions of population inversion, gain and temperatures of the gas flow, in addition to the laser intensity and power extraction were studied inside the cavity, for certain initial conditions like pressure (p0=20 atm), temperature (T0= 1500 K), ratio of gases in the laser mixture (CO2:N2:H2O ≡ 10:85:5).","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130401857","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}
{"title":"Design issues of resonant piezoelectric sensors","authors":"B. Dulmet","doi":"10.1117/12.795274","DOIUrl":"https://doi.org/10.1117/12.795274","url":null,"abstract":"This paper presents some issues governing the design of piezoelectric resonant sensors delivering a frequency output. We focus on BAW resonant sensors. As an application example, we consider the case study of miniature temperature sensors using strip resonators as sensing elements. In addition, we shortly discuss the current trends in the field of micromachined inertial acoustic sensors especially regarding miniaturization. Although currently available sensors of this type mostly rely on low frequency flexural vibrations, strip resonators micro-machined in III-V piezoelectric semi conductors multilayer substrates may take over a significant role for such application in the near future since they could bring the precision level characterizing essentially thickness shear resonators into monolithic sensors systems built upon completely integrated piezoelectric oscillators.","PeriodicalId":300417,"journal":{"name":"Advanced Optoelectronics and Lasers","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127220594","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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