Zhou B, Shi LF, Wang YS, Yang HX, Xue JH, Liu L, Yin JC, Wang JC
Resonance Light Scattering Determination of Uranyl Based on Labeled DNAzyme-gold Nanoparticle System.
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy. 2013 Mar 14; 110: 419-424.
A resonance light scattering (RLS) method has been developed using a uranyl (UO2(2+)) specific DNAzyme and gold nanoparticles (AuNPs). In this strategy, the cleavage of the substrate strand (SDNA) of DNAzyme results in releasing a shorter duplex in the presence of UO2(2+), leading to the aggregation of AuNPs and the increase of RLS intensity. The response signals linearly correlated with the concentration of UO2(2+) over the range of 1.36×10(-8)-1.50×10(-7)molL(-1). The limit of detection (LOD) is 4.09×10(-9)molL(-1). The method has excellent selectivity and higher sensitivity. It could provide a promising potential for the detection of metal ions, and be benefit to extend the application of RLS method.