Highly sensitive detection of trace Hg2+ based on fine CdS nanodots grew from a DNA-directed alternate dialysis method

被引：0
作者：
Chen, Shu [1 ]
He, Quan [1 ]
Tang, Jian [1 ]
Bai, Shan [1 ]
Long, Yunfei [1 ]
机构：
[1] Hunan Univ Sci & Technol, Minist Educ China, Key Lab Theoret Chem & Mol Simulat, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China
来源：
ADVANCED MATERIALS, PTS 1-4 | 2011年 / 239-242卷
关键词：
CdS nanodot; Dialysis; Fluorescence; Resonance light scattering; Hg2+; GOLD NANOPARTICLES; COLORIMETRIC DETECTION; FLUORESCENT SENSORS; AQUEOUS-SOLUTIONS; OPTICAL-DETECTION; MERCURIC ION; MERCURY(II); NANOCRYSTALS; SPECTROMETRY;
D O I：
10.4028/www.scientific.net/AMR.239-242.536
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Fine CdS nanodots (similar to 5 nm) have been prepared in aqueous solution under the control of ds-DNA via a novel alternating dialysis procedure, which have been characterized by TEM, UV-vis, fluorescence (FL) and resonance light scattering (RLS) spectra. The resultant well-dispersed CdS nanodots present a strong FL peak at 339 nm and RLS bands around 394 nm. Interestingly, it was found that the quenching of FL and the enhancing of RLS intensity are dependent on the concentration of Hg2+, both of which showed good linear relationship over the range of 0.01-100 mu mol/L, with a detection limit (3 sigma) as low as 0.91 nmol/L. Good selectivity of this method for Hg2+ analysis has also been checked over other metal ions.
引用
收藏
页码：536 / 539
页数：4
相关论文
共 21 条
  • [1] Fine-tuning nanoparticle size by oligo(guanine)n templated synthesis of CdS:: An AFM study
    Berti, Lorenzo
    Alessandrini, Andrea
    Bellesia, Manuele
    Facci, Paolo
    [J]. LANGMUIR, 2007, 23 (22) : 10891 - 10892
  • [2] Brian A.K., 2000, LANGMUIR, V16, P3588
  • [3] Atomic spectrometry update. Environmental analysis
    Butler, OT
    Cook, JM
    Harrington, CF
    Hill, SJ
    Rieuwerts, J
    Miles, DL
    [J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 2006, 21 (02) : 217 - 243
  • [4] Synthesis of novel nanocrystals as fluorescent sensors for Hg2+ ions
    Chen, B
    Ying, Y
    Zhou, ZT
    Zhong, P
    [J]. CHEMISTRY LETTERS, 2004, 33 (12) : 1608 - 1609
  • [5] A sensitive resonance light scattering spectrometry of trace Hg2+ with sulfur ion modified gold nanoparticles
    Fan, Ya
    Long, Yun Fei
    Li, Yuan Fang
    [J]. ANALYTICA CHIMICA ACTA, 2009, 653 (02) : 207 - 211
  • [6] Harris D.C.:., 2007, QUANTITATIVE CHEM AN, VSeventh
  • [7] Selective gold-nanoparticle-based "turn-on" fluorescent sensors for detection of mercury(II) in aqueous solution
    Huang, Chih-Ching
    Chang, Huan-Tsung
    [J]. ANALYTICAL CHEMISTRY, 2006, 78 (24) : 8332 - 8338
  • [8] Colorimetric detection of mercuric ion (Hg2+) in aqueous media using DNA-functionalized gold nanoparticles
    Lee, Jae-Seung
    Han, Min Su
    Mirkin, Chad A.
    [J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2007, 46 (22) : 4093 - 4096
  • [9] Mercury in environmental samples: Speciation, artifacts and validation
    Leermakers, M
    Baeyens, W
    Quevauviller, P
    Horvat, M
    [J]. TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2005, 24 (05) : 383 - 393
  • [10] Elimination efficiency of different reagents for the memory effect of mercury using ICP-MS
    Li, YF
    Chen, CY
    Li, B
    Sun, J
    Wang, JX
    Gao, YX
    Zhao, YL
    Chai, ZF
    [J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 2006, 21 (01) : 94 - 96
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