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Formation of Core-Shell Au@Ag Nanorods Induced by Catecholamines: A Comparative Study and an Analytical Application

Formation of Core-Shell Au@Ag Nanorods Induced by Catecholamines: A Comparative Study and an Analytical Application

M V Gorbunova, V V Apyari, S G Dmitrienko, A V Garshev

Anal Chim Acta. 2016 Sep 14;936:185-94.

PMID: 27566354

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP118409577-A	AG 18 - CAS 118409-57-7		118409-57-7	Price

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