Selective colorimetric analysis of spermine based on the cross-linking aggregation of gold nanoparticles chain assembly.


A selective colorimetric assay for spermine was proposed in this work. In a weak alkaline medium, the conformational structure of double-stranded calf thymus DNA (ctDNA) was loosened to install gold nanoparticles (AuNPs) into chains. While, the chain assembly of AuNPs could form cross-linking aggregates when spermine was present, which was attributed to the… (More)
DOI: 10.1016/j.talanta.2017.01.085