A method for preparing silver clusters using hydrogen as a reducing agent

Abstract

The invention provides a silver nanocluster preparation method with hydrogen serving as a reducing agent. The silver nanocluster preparation method is characterized in that polyelectrolyte and silver salt react at a room temperature in a hydrogen atmosphere by taking the polyelectrolyte as a template and the hydrogen as the reducing agent so as to obtain a near-infrared emission silver nanocluster. The silver nanocluster preparation method has the advantages of low cost, simplicity, mild reacting conditions, no participation of highly-toxic substance and more economy and environmental protection, and the prepared silver nanocluster is excellent in fluorescence characteristic and stability.

Description

technical field

[0001] The invention relates to the field of synthesis of noble metal nanometer materials, in particular to a method for preparing silver clusters with light-to-fluorescence emission by using hydrogen as a reducing agent. Background technique

[0002] Silver nanoclusters (AgNCs) are fluorescent, water-soluble molecular-level aggregates composed of several to dozens of silver atoms. Its unique quantum size effect makes its optical properties vary with particle size, which makes its fluorescence emission spectrum tunable in the range from visible light to near-infrared light. In addition, AgNCs are characterized by good biocompatibility, strong photostability, strong anti-aggregation ability, large Stokes shift and no flickering on all relevant time scales, which greatly improved their performance as biomarkers, significantly Increased sensitivity of existing analytical methods. Therefore, AgNCs are becoming a new favorite in the field of bioanalysis. At pre...

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