Fast colorimetric detection of copper ions using L-Cysteine functionalized gold nanoparticles
Data(s) |
01/02/2007
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Resumo |
This communication reports an efficient visual detection method of Cu<sup>2+ </sup>by L-cysteine functionalized gold nanoparticles in aqueous solution. Upon exposure to Cu<sup>2+</sup>, the gold nanoparticle solution changed from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. This colorimetric sensor allows a rapid quantitative assay of Cu<sup>2+</sup> down to the concentration range of 10<sup>−5</sup> M. Recognition of Cu<sup>2+</sup> and formation of the aggregates are proposed to occur via a 2 : 1 sandwich complex between L-cysteine and Cu<sup>2+</sup>. <br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
American Scientific Publishers |
Direitos |
2007, American Scientific Publishers |
Tipo |
Journal Article |