Microwave assisted in situ synthesis of Ag-NaCMC films and their reproducible surface-enhanced Raman scattering signals

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• 作者：Tao Jiang ; Junpeng Li ; Li Zhang ; Binbing Wang ; Jun Zhou ; ^{zhoujun@nbu.edu.cn" class="auth_mail} ; ^{zhujun672155@163.com" class="auth_mail}
• 关键词：Silver nanoparticles ; Polymer film ; Microwave ; SERS
• 刊名：Journal of Alloys and Compounds
• 出版年：25 July, 2014
• 年：2014
• 卷：602
• 期：Complete
• 页码：94-100
• 全文大小：2539 K

文摘

Two kinds of Ag-NaCMC films for surface-enhanced Raman scattering (SERS) were prepared by conventional heating and microwave assisted in situ reduction methods without any additional capping or reducing agents. A relatively narrow and symmetric surface plasmon resonance band was observed in the absorption spectra of the films fabricated by the microwave assisted in situ reduction method. More uniform silver nanoparticles (NPs) implied by the symmetric absorption spectrum were further confirmed by the scanning electron microscopy images. After the simulation of the E-field intensity distribution around the silver NPs in NaCMC film, the Raman scattering enhancement factors (EFs) of these films were then investigated with 4-mercaptobenzoic acid molecule as a SERS reporter. Improved reproducibility of SERS signal was obtained in the microwave assisted synthesized Ag-NaCMC film, although it maintained an EF as only 1.11 脳 10⁸. The reproducible SERS signal of the Ag-NaCMC film is particularly attractive and this microwave assisted in situ reduction method is suitable for the production of excellent substrate for biosensor application.