Rapid Quantitative Analysis of Silver Nanowire Synthesis via UV-Vis Spectral Deconvolution
Abstract
The formation of silver nanoparticles (AgNPs) as byproducts during the synthesis of silver nanowires (AgNWs) necessitates accurate quantification of their relative abundances for evaluating practical applications. This study introduces a rapid quantitative approach based on UV-Vis spectral peak deconvolution. By modulating the molecular weight (MW) of polyvinylpyrrolidone (PVP), effective control over the diameter and yield of AgNWs was realized. Experimental results show that low-MW PVP (24 kDa) promotes the formation of short nanorods, intermediate-MW PVP (220 kDa) maximizes the aspect ratio to 370, and high-MW PVP (1300 kDa) reduces it to 310 due to steric hindrance. A novel mixed PVP system (1300 kDa:24 kDa = = 2:1) significantly optimizes the nanowire morphology, yielding AgNWs with an aspect ratio of 920. However, competitive adsorption kinetics in this system resulted in a minimum AgNW/AgNP ratio of 0.90. A quantitative model correlating the average diameter of AgNWs with their characteristic UV-Vis absorption peak (370–400 nm) was established, enabling rapid diameter estimation through spectral analysis. Gaussian–Lorentzian hybrid functions were used to deconvolute the plasmon resonance peaks of AgNWs (370–400 nm) and AgNPs (450–500 nm), with the ratio of their peak areas employed to determine the proportion of wirelike products. This method shows strong agreement with SEM statistical results (Pearson coefficient = 0.84, R2 = 0.75). Without requiring complex separation or machine learning, our approach enables rapid determination of AgNW diameters and yields through UV-Vis spectral deconvolution, providing an efficient and costeffective solution for optimizing industrial synthesis and quality control.
About the Authors
J. WangChina
Xiamen, Fujian
J. Zuo
China
Xiamen, Fujian
L. Ma
China
Xiamen, Fujian
Y. Wang
China
Xiamen, Fujian
J. Chen
China
Xiamen, Fujian
Y. Li
China
Xiamen, Fujian
H. Zhang
China
Xiamen, Fujian
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Review
For citations:
Wang J., Zuo J., Ma L., Wang Y., Chen J., Li Y., Zhang H. Rapid Quantitative Analysis of Silver Nanowire Synthesis via UV-Vis Spectral Deconvolution. Zhurnal Prikladnoii Spektroskopii. 2025;92(6):832.





















