English  |  正體中文  |  简体中文  |  Items with full text/Total items : 27533/39387
Visitors : 2542503      Online Users : 28
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/38495

Title: Synthesis of Photoluminescent Au NDs–PNIPAM Hybrid Microgel for the Detection of Hg2+
Authors: Li-Yi Chen
Chung-Mao Ou
Wei-Yu Chen
Chih-Ching Huang
Huan-Tsung Chang
Contributors: 國立臺灣海洋大學:生命科學暨生物科技學系
Keywords: poly(N-isopropylacrylamide)
gold nanodots
mercury detection
Date: 2013
Issue Date: 2016-09-07T08:26:03Z
Publisher: ACS Applied Materials and Interfaces
Abstract: Abstract: Poly(N-isopropylacrylamide) microgels (PNIPAM MGs) incorporated with photoluminescent gold nanodots (Au NDs) have been prepared and employed for the detection of mercury ions (Hg2+). Each of the PNIPAM MGs (hydrodynamic diameter 615 ± 15 nm) contains several Au NDs (diameter 1.8 ± 0.2 nm) in the Au ND–PNIPAM MGs. Like Au NDs, Au ND–PNIPAM MGs exhibit an absorption band at 375 nm that is assigned for ligand to metal charge transfer mixed with metal centered (ds/dp) states and photoluminescence at 520 nm originated from Au ND/polynuclear gold(I)–thiolate (core/shell) complexes. Purification of Au ND–PNIPAM MGs relative to Au NDs is much easier through a simple centrifugation/wash process. On the basis of Hg2+-induced photoluminescence quenching due to the formation of Au–Hg amalgam and formation of Au ND–PNIPAM MGs aggregates, the signal response of Au ND–PNIPAM MGs against Hg2+ concentration is linear over a range from 2 to 20 nM (r = 0.9945). This selective approach provides limits of detection for Hg2+ (at a signal-to-noise ratio of 3) of 1.9 and 1.7 nM in phosphate buffer solutions (5 mM, pH 7.0) with and without containing 500 mM NaCl, respectively. This selective and sensitive Au ND–PNIPAM MG probe has been applied to the determination of the concentration of Hg in a representative fish sample, showing its practical potential for monitoring of Hg levels in complicated biological and environmental samples.
Relation: 5(10)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/38495
Appears in Collections:[生命科學系] 期刊論文

Files in This Item:

File Description SizeFormat

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback