Dopamine sensing and measurement using threshold and spectral measurements in random lasers.

摘要: We developed a novel dopamine sensing and measurement technique based on aggregation of gold nanoparticles in random lasers. Dopamine combined with copper ions triggers the thus affects performance can be achieved using four parameters which are sensitive to presence dopamine, that is emission peak shift, linewidth, signal-to-noise ratio (peak intensity / noise) lasing threshold. The most sensitively detected by change linewidth limit detection 1 × 10−7 M, as well an increase concentration from M 10−2 determined calibrating laser