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Selective Aggregation of silver nanoprisms Induced by Monohydrogen Phosphate and its Application for Colorimetric Detection of Chromium(Ⅲ) Ions

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Journal of Analysis and Testing 2021年第3期5卷 225-234页

作者： Zheng-Fen Pu Bi-Chao Wu Yuan-Hang Tan Qiu-Lin Wen Jian Ling Qiu-E Cao Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province School of Chemical Science and TechnologyYunnan UniversityKunming 650091China

In this study,we established a simple colorimetric method for visual detection of chromium(Ⅲ)ions using aggregated silver nanoprisms induced by monohydrogen *** detection strategy had two steps,selective aggregation of silver nanoprisms with monohydrogen phosphate at high temperature,and anti aggregation of silver nanoprisms in the presence of chromium(Ⅲ)*** this strategy,significant spectral shift of the localized surface plasmon resonance(LSPR)absorption peak of silver nanoprisms could be visualized with the color changed from yellow to *** spectral peak shift of silver nanoprisms in the anti-aggregation process was linear with the concentrations of the added chromium(Ⅲ)ions in the range of 20.0-800.0 ***,a colorimetric method for chromium(Ⅲ)ions detection was established with the detection limit of 3.6 *** experimental results of real water samples indicated that the colorimetric sensor was potential in environmental monitoring.

关键词： silver nanoprisms Aggregation Chromium Localized surface plasmon resonance Monohydrogen phosphate

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Colloidal Synthesis of silver nanoprisms in Aqueous Medium:Influence of Chemical Compounds in UV/Vis Absorption Spectra

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Advances in Nanoparticles 2013年第3期2卷 217-222页

作者： Josivandro N.Silva Jamil Saade Patricia M.A.Farias Eduardo Henrique Lago Falcao Research Group on Nanostructures and Biological Interfaces(NIB) Federal University of Pernambuco(UFPE)RecifeBrazil Graduate Program on Materials Science(PGMTR) Federal University of Pernambuco(UFPE)RecifeBrazil

In this work we explore the influence of the factors that affect the formation of silver nanoprisms (AgNPs) with distinct size and size distribution as well as the most intense absorption peak shift. Box-Behnken design analysis was applied to optimize the production of silver nanoprism via colloidal synthesis. The analysis of the responses was based on the nanoprisms plasmon peak wavelength related to in-plane dipole (tunable band) at λmax. ≥ 420 nm. The obtained results indicate that silver ion is the main variable for the tuning of the size and the Localized Surface Plasmon Resonance (LSPR) frequency. By using the Box-Behnken design it was possible to synthesize nanoparticles with a predictable size and to establish a rigorous control of the plasmon frequency at the range of 600 up to 800 nm.

关键词： silver nanoprisms Localized Surface Plasmon Resonance Box-Behnken Design

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