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Optical Properties of Nanocomposite Films: Size-tuned vs. Shape-tuned Silver Nanoparticles 纳米复合薄膜的光学性质:尺寸调谐与形状调谐的纳米银
American Journal of Nanomaterials Pub Date : 2019-06-12 DOI: 10.12691/AJN-7-1-3
Maryuri Roca, Hannah E Skipper, Jessica Ranesizafiniaina Ndrianasy
{"title":"Optical Properties of Nanocomposite Films: Size-tuned vs. Shape-tuned Silver Nanoparticles","authors":"Maryuri Roca, Hannah E Skipper, Jessica Ranesizafiniaina Ndrianasy","doi":"10.12691/AJN-7-1-3","DOIUrl":"https://doi.org/10.12691/AJN-7-1-3","url":null,"abstract":"Color change is a desirable response when designing user-friendly chemical sensors. However, when preparing colored nanocomposites sensors, it can be challenging to transfer the color from solution into films. This work demonstrates that films of various colors can be prepared by blending premade nanoparticles with poly(vinyl alcohol) (PVA); however, the color in solution differed from the color in film. While, this color discrepancy and the appearance of the films depended on how the optical properties of nanoparticles were tuned, UV-visible spectroscopy and Transmission Electron Microscopy (TEM) showed that changes in nanoparticle’s morphology was not the cause of the color discrepancy. Reflecting the polydispersity of nanoparticles in solution, more homogeneous colored films were obtained by controlling the size of nanoparticles rather than their shape. This work shows how to readily prepare silver-PVA nanocomposite films of various colors, which may facilitate the design of nanocomposites intended for chemical sensing based on the optical properties of silver nanoparticles.","PeriodicalId":262812,"journal":{"name":"American Journal of Nanomaterials","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125225065","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
Growth of a-axis Textured Pulsed Laser Deposited VO2 Nanostructures on Glass Substrate a轴织构脉冲激光沉积VO2纳米结构在玻璃衬底上的生长
American Journal of Nanomaterials Pub Date : 2018-06-05 DOI: 10.12691/ajn-6-1-3
M. Thiam, B. Ngom, O. Sakho, N. M. Ndiaye, M. Chaker, N. Manyala, A. Beye
{"title":"Growth of a-axis Textured Pulsed Laser Deposited VO2 Nanostructures on Glass Substrate","authors":"M. Thiam, B. Ngom, O. Sakho, N. M. Ndiaye, M. Chaker, N. Manyala, A. Beye","doi":"10.12691/ajn-6-1-3","DOIUrl":"https://doi.org/10.12691/ajn-6-1-3","url":null,"abstract":"Vanadium dioxide thin film nanostructures were synthesized by pulsed laser deposition on soda lime glass at a substrate temperature of 600°C and an oxygen ambient pressure of 15 mTorr. The effect of cooling pressure on the crystalline orientation of VO2 nanostructures was investigated. As the cooling oxygen pressure is increased, the VO2 nanostructures exhibit sharp a-axis diffraction peaks, showing the growth of (1 0 0) oriented VO2 on glass, which is characteristic of the VO2 monoclinic phase and implies that pure highly a-axis textured VO2 was formed. We found that the growth mechanism and substrate–film interaction play important roles in the development of these well-textured films via the formation of an interlayer of SiO2.","PeriodicalId":262812,"journal":{"name":"American Journal of Nanomaterials","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131629023","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
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