Cd Form and Transition Study in Aquatic Environment by Gold Nanorods Attached with Sulfhydryl

Abstract

Many biomolecular photothermal therapies in heavy metals detection are expensive and complicated. In this paper, compared to expensive and complex biomolecular photothermal therapy, a new type of coated nanomaterial was used to research Cd in water. We explored the assembly of glutathione-growth gold nanorods through the attachment of sulfhydryl groups on glutathione to the surface of gold nanorods, and studied the optimal incubation conditions for the preparation of Cd by reaction time and temperature. This study expounded the principle using the incubated gold nanorods, and quantitatively determined the content of Cd based on the ([Formula: see text] between two plasmon resonance absorption peaks of the gold nanorods. The linear range of the detection of isoniazid was 0.5–5.0[Formula: see text][Formula: see text]M, and the detection limit was 0.35[Formula: see text][Formula: see text]M. The recovery rates were 88.2–107.1%, and the results were satisfactory. This gold nanorods quantitative method was sensitive and feasible in Cd research in water environment application.