کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
609095 880615 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication of silver nanoparticles/single-walled carbon nanotubes composite for surface-enhanced Raman scattering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Fabrication of silver nanoparticles/single-walled carbon nanotubes composite for surface-enhanced Raman scattering
چکیده انگلیسی

A simple method of the fabrication of silver nanoparticles/single-walled carbon nanotubes (Ag/SWNTs) composite for surface-enhanced Raman scattering was presented. The morphology of Ag/SWNTs composite was characterized by scanning electron microscopy and X-ray diffraction. The performance of the Ag/SWNTs composite as surface-enhanced Raman scattering (SERS) active substrate was evaluated via using 4-aminothiophenol (PATP) as the probe molecule. Compared with PATP on AgNPs film, the SERS signal of PATP was obviously improved on the Ag/SWNTs composite. Then, by examining the relative enhancement of the nontotally symmetric (b2) modes of PATP, this effect was shown to arise from a charge-transfer contribution between molecule and metal.

A facile method was introduced to synthesize Ag/single-walled carbon nanotubes composite, which can be used as an effective SERS-active substrate.Figure optionsDownload high-quality image (109 K)Download as PowerPoint slideResearch highlights
► Furtherly, Raman and X-ray photoelectron spectroscopy (XPS) measurements for Ag/SWNTs composite were used to verify charge-transfer from Ag to SWNTs in the system.
► It was estimated the charge-transfer from Ag to SWNTs in PATP/Ag/SWNTs would augment the charge-transfer between PATP molecule and Ag, which enhanced selectively the b2 mode of PATP.
► It was the first time to introduce SWNTs to SERS substrate, and this study would have great significance to the design of new SERS substrate and research on SERS mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 351, Issue 2, 15 November 2010, Pages 343–347
نویسندگان
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