کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1250246 970798 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Silver nanoparticles active as surface-enhanced Raman scattering substrates prepared by high energy irradiation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Silver nanoparticles active as surface-enhanced Raman scattering substrates prepared by high energy irradiation
چکیده انگلیسی

In surface-enhanced Raman scattering (SERS) technique the preparation of metal substrates containing minimum hindrance from impurities is an important issue. The synthesis of silver nanoparticles (Ag NPs) active as SERS substrates and having the above-mentioned advantage, were obtained by electron beam irradiation of Ag+ aqueous solutions. Ag+ ions were reduced by free radicals radiolytically generated in solution without the addition of chemical reductants or stabilizing agents.The metal colloids were characterised by UV–Vis spectroscopy and scanning electron microscopy, monitoring the nanoparticles’ growth process that depends on the irradiation dose and the initial AgNO3 concentration. Nanoparticles of long-time stability and with different size and shape, included silver nanocubes, were synthesised by varying the irradiation dose. Different tests on the SERS activity of Ag NPs obtained by electron beam irradiation were performed by using benzenethiol as a probing molecule, achieving a good magnification of the adsorbate Raman bands.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 57, Issue 1, 16 September 2011, Pages 42–48
نویسندگان
, , , ,