Role of Capping Agent for the Colorimetric and Fluorescent Sensing of Different Materials Using Metal Nanoparticles

Abstract

Background: The selection of capping agent depends on the method of synthesis, nature of nanoparticles (NPs), and type of the compounds to be analyzed. Therefore, different types of capping agents such as surfactants, drugs, amino acids, fatty acids, and polymers are used to increase stability of NPs, avoid aggregation, keeping NPs away from one another, and achieve desired morphology as well as the size of NPs. Introduction: Recently, the fabrication nanoparticle has been extensively carried out using chemical synthetic route and a wide range of material. In this review, a comprehensive assessment of the colorimetric and fluorescent sensing of metal nanoparticles using different capped agents such as surfactants, drugs, amino acids, fatty acids, and polymers has been summarized for the present and future strategies. Method: For the synthesis of metal nanoparticles, different methods, metals and a variety of capping agents are used to obtain new properties and to explore opportunities of innovative applications. Result: Capping agents perform their significant role as stabilizers to avoid the over-growth and coagulation of nanoparticles. Conclusion: Capping agents play an essential role in the colorimetric and fluorescent sensing of metal nanoparticles for particular analytes.

Intrinsic properties of chitosan on the characteristics of gold nanoparticles and its application as smart packaging device

“…The capping agents are used to increase the stability, avoid agglomeration and to keep the desired morphology of nanoparticles. Different capping agents like surfactants, amino acids, fatty acids, drugs and polymers are usually used (Sherazi et al, 2022).…”