کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10412737 895152 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ag nanoclusters on ZnO nanodome array as hybrid SERS-active substrate for trace detection of malachite green
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Ag nanoclusters on ZnO nanodome array as hybrid SERS-active substrate for trace detection of malachite green
چکیده انگلیسی
Ag nanoclusters (NCs) were deposited on a focused ion beam (FIB)-fabricated ZnO nanodome (ND) to create a hybrid metal-semiconductor nanosystem for sensing extremely low concentrations of target species. The Ag NCs were uniformly distributed on the top and side surfaces of the ZnO ND. The surface-enhanced Raman scattering (SERS) effect of Ag NCs on ZnO ND was correlated with the coupling density of Ag NCs upon ZnO NDs with an optimized enhancement factor of 106. The improved SERS effect is attributed to the generation of strong local electromagnetic fields induced by the NCs on NDs and intra-NC interactions. In addition, the hybrid nanosystem was found to distinguish malachite green with good reproducibility over a wide range of concentrations down to the single-molecule detection limit (i.e., 10−17 M). This unique metal-semiconductor hybrid nanosystem is advantageous for the formation of Raman signal polarization among the excitation laser, nanostructure, and target species with high sensitivity and selectivity and is thus suitable for the trace detection of various target species.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 207, Part A, February 2015, Pages 430-436
نویسندگان
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