Dynamic Light Scattering for Fluoride Ions Detection

doi:10.7503/cjcu20111244

Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (10): 2195.doi: 10.7503/cjcu20111244

• Analytical Chemistry • Previous Articles Next Articles

Dynamic Light Scattering for Fluoride Ions Detection

WANG Qing, YANG Li-Yan, LIU Jian-Bo, YANG Xiao-Hai, WANG Ke-Min, JI Hai-Ning, LIU Yan

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China

Received:2011-12-30 Online:2012-10-10 Published:2012-09-12
Contact: Kemin Wang E-mail:kmwang@hnu.edu.cn;yangxiaohai@hnu.edu.cn

Abstract

Abstract:

The cystea mine-capped CdTe quantum dots (QDs) undergo spontaneous self-aggregation via NH-N hydrogen bonds. In the presence of F^-, the aggregates disassembled due to the substitution of NH-F hydrogen bonds for NH-N hydrogen bonds. Thus, the hydrodynamic size of the QDs aggregates was decreased gradually as the concentration of F^- increased. Here, a one-step sensitive method using dynamic light scattering(DLS) was introduced for directly detection of F^-. The detection limit of this method was ca. 20 nmol/L. It was ca. 2 orders of magnitude lower than that of fluorscence methods and F^- selective electrode, as reported previously.

Key words: Dynamic light scattering, Fluoride ion, Quantum dots, Aggregation, Hydroclynamic size

CLC Number:

O657

TrendMD:

WANG Qing, YANG Li-Yan, LIU Jian-Bo, YANG Xiao-Hai, WANG Ke-Min, JI Hai-Ning, LIU Yan. Dynamic Light Scattering for Fluoride Ions Detection[J]. Chem. J. Chinese Universities, 2012, 33(10): 2195.

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Dynamic Light Scattering for Fluoride Ions Detection

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