Robust one pot synthesis of colloidal silver nanoparticles by simple redox method and absorbance recovered sensing

Biosensors & Bioelectronics
Muhammad SalmanShamsa Kanwal

Abstract

Conventional synthesis of silver nanoparticles employs a reducing agent and a capping agent. In this report water-soluble silver nanoparticles (AgNPs) were prepared facilely by chemical reduction of Ag(I) ions. 4-Amino-3-(d-gluco-pentitol-1-yl)-4,5-dihydro-1,2,4-triazole-5-thione (AGTT) was used both as reducing and stabilizing agent. Direct heating methodology was found to be more suitable for achieving particles with a hydrodynamic diameter of ~20 nm. AGTT exists as tautomer in solution form and our studies indicate that -NH(2) group is involved in the reduction and stabilization of Ag(+) and thione (Δ=S) group of AGTT is possibly involved in stabilizing the nanoparticles via coordinate covalent linkage. Characterization of synthesized silver nanoparticles was performed by UV-vis, FT-IR and by FESEM. Based on the absorption properties of synthesized AgNPs, we used AgNPs to detect bovine serum albumin (BSA) and AgNPs-BSA composite nanoprobe was further applied to detect Cu(2+) based on absorbance recovery. The proposed method has advantages over existing methods in terms of rapid synthesis and stability of AgNPs and their applications. Analysis is reproducible, cost effective and highly sensitive. The lowest detectable concent...Continue Reading

References

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Jul 28, 2007·Journal of Nanoscience and Nanotechnology·N VigneshwaranR H Balasubramanya
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May 16, 2009·Biosensors & Bioelectronics·Xinyan BiKun-Lin Yang
Sep 11, 2009·Biosensors & Bioelectronics·Peng ZuoBang-Ce Ye
Apr 20, 2010·Advanced Materials·Hangxun Xu, Kenneth S Suslick
Oct 1, 2011·Chemical Communications : Chem Comm·Abdul HameedShamsa Kanwal
Oct 27, 2011·Chemical Communications : Chem Comm·Yu-rong MaYa-qi Cai

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Citations

Oct 16, 2015·Nanoscale Research Letters·J R González-CastilloJuana C Ibarra

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