欧美日韩快来操_福利影院香蕉_亚洲人妻探花自拍_国产αV射_AV性爱在线_一级性爱视频免费观看_青娱乐 啪啪_国产极品女主播亚洲春色_亚洲精品无码人妻色图_曰韩特黄a带_乳蜜AV_精品无码一区二区三区大象_国产在线看片_九九黄色精品_人人看人人摸人人爱人人操

Formation of core-shell Au@Ag nanorods induced by catecholamines: A comparative study and an analytical application

作者： M.V. Gorbunova^a, V.V. Apyari^a, S.G. Dmitrienko^a, A.V. Garshev^{a, b}

^a Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow 119991, Russia

^b Faculty of Materials Science, Lomonosov Moscow State University, Leninskie Gory, 1/73, Moscow 119991, Russia

摘要：Gold nanorods (AuNRs) stabilized by cetyltrimethylammonium bromide (CTAB) were synthesized and an interaction of catecholamines (CAs) with silver ions in the presence of the obtained AuNRs was studied. The reaction results into formation of core-shell Au@Ag nanorods (Au@AgNRs) and leads to a hypsochromic shift of the long-wave surface plasmon resonance (SPR) band in the absorption spectrum of AuNRs. The influence of a CA structure, excess of CTAB, interaction time, pH, concentration of AuNRs, silver ions and CAs on this interaction was studied. Based on correlation of the NRs spectral characteristics with the concentration of CAs, a method for spectrophotometric determination of dobutamine, epinephrine, norepinephrine and dopamine with detection limits 27, 18, 16 and 13 μg L−1, respectively, has been developed. The method can be applied to the analysis of medicines.