期刊
NANOSCALE
卷 3, 期 5, 页码 2150-2154出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1nr10149h
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资金
- Zhejiang Provincial Natural Science Foundation of China [R5110230]
- Ningbo Natural Science Foundation of China [2009A610122, 2010A610159]
- Bureau of Academy-Locality Cooperation Chinese Academy of Sciences
- CAS/SAFEA
- Science and Technology Innovative Research Team of Ningbo Municipality [2009B21005]
- National Natural Science Foundation of China [20705002]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State of Education Ministry
- State of Ministry of Human Resources & Social Security
A simple, rapid and sensitive colorimetric assay method for detection of Co2+ through thioglycollic acid (TGA) functionalized hexadecyl trimethyl ammonium bromide (CTAB) modified Au NPs has been discovered in our work. TGA functionalized CTAB modified Au NPs can be aggregated quickly in the presence of Co2+ through a cooperative metal-ligand interaction. Transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDS), and UV-vis spectra were used to characterize the Au NPs aggregation. The presence of Co2+ is monitored by a colorimetric response of functionalized Au NPs, and had a detection limit of 3.0 x 10(-7) M. Moreover, the selectivity of this method has been investigated by comparing with other metal ions (Hg2+, Na+, Cu2+, Cd2+, Ba2+, Pb2+, Mn2+, Ni2+, Zn2+, Fe2+ and Fe3+).
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