کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7145761 | 1462071 | 2015 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thiol-capped gold nanoparticles: Influence of capping amount on electrochemical behavior and potential application as voltammetric sensor for diltiazem
ترجمه فارسی عنوان
نانوذرات طلای طلایی طلایی: تاثیر مقدار بسته بندی بر رفتار الکتروشیمیایی و کاربرد بالقوه به عنوان سنسور ولتاژ برای دیلتیازیم
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کلمات کلیدی
نانوذرات طلا، روش دو فازی، دیستیزم، سنسور الکتروشیمیایی، ولتاژ سنجی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
The present work describes the electrochemical activity of dodecanethiol-capped gold nanoparticles (AuNPs) obtained by modified biphasic method. The variation of the stoichiometric ratio between [AuCl4â] and dodecanethiol has yielded nanostructures with different sizes and distinct electrochemical activities. Using molar ratios Au:dodecanethiol (Au:Thiol) of 1:1, 2:1 and 4:1, gold nanoparticles were obtained with average diameter of 2.3 ± 0.7, 3.1 ± 0.5 and 4.3 ± 0.7 nm, respectively. Cyclic voltammetry (CV) experiments using glassy carbon electrode modified with such gold nanoparticles were performed and the influence of AuNPs amount, pH, scan rate sweep and current stability on the voltammetric response has been analysed. The system which has presented best electroactivity to oxide formation was evaluated as sensor for Diltiazem (DTZ) determination. Voltammetric response was observed in presence of DTZ attributed to electrochemical-chemical (EC') mechanism between the analyte and the electrode surface. The cathodic peak currents obtained from Linear Sweep Voltammetry (LSV) decrease linearly with increasing DTZ concentrations, obtaining a linear profile for DTZ solutions ranging from 4.0 to 13.5 nmol Lâ1 with limit of detection and limit of quantification of 0.5 and 1.7 nmol Lâ1, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 220, 1 December 2015, Pages 673-678
Journal: Sensors and Actuators B: Chemical - Volume 220, 1 December 2015, Pages 673-678
نویسندگان
Ava Gevaerd, Fabio R. Caetano, Paulo R. Oliveira, Aldo J.G. Zarbin, Márcio F. Bergamini, Luiz H. Marcolino-Junior,