http://scholars.ntou.edu.tw/handle/123456789/15954
標題: | Raman Spectrometry of Scattering of Nano-Gold Ceria Films | 作者: | Idris, Muhammad Nur Syafi'ie Md Chiang, Hai-Pang Muslim, Noormariah Chau, Yuan-Fong Chou Mahadi, Abdul Hanif Voo, Nyuk Yoong Lim, Chee Ming |
關鍵字: | Ceria;Electrical Field Enhancement;Finite Element Method;Gold Nano-Particles;Plasmonic | 公開日期: | 1-十一月-2018 | 出版社: | American Scientific Publishers | 卷: | 24 | 期: | 11 | 起(迄)頁: | 8940-8943 | 來源出版物: | Advanced Science Letters | 摘要: | Gold nano-particles (NPs) were sputtered onto spin-coated ceria film, and different Au NPs concentration were achieved by varying the deposition time; at 90 s (90Au–CeO2) and 120 s (120Au–CeO2). The nano-gold ceria film was exposed to a low power laser irradiation (10 mW) at 532 nm to produce localized surface plasmons resonance (LSPR). The LSPR from the gold NPs causes the magnification of the F2g Raman mode of ceria through surface-enhanced Raman scattering (SERS), and induced crystals anharmonicity caused by plasmon heating. The Raman intensities of ceria for 90Au–CeO2 and 120Au–CeO2 were almost similar, however, the redshift and full-width at half maximum (FWHM) of the ceria F2g Raman mode were greater for 90Au–CeO2 This was due to the gaps present between the gold NPs, which contribute to the enhancement of electrical field intensity distribution. In the case of 120Au–CeO2, the electrical field enhancement was reduced because of the inter-NP gaps were reduced with the increase in concentration of the gold NPs. The finite element method (FEM) was used to demonstrate the effect of the inter-NP gaps on the electrical field intensity distribution. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/15954 | ISSN: | 1936-6612 | DOI: | 10.1166/asl.2018.12380 |
顯示於: | 光電與材料科技學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。