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<p>Calculating the optical extinction cross-section (σ<sub>ext</sub>), which consists of absorption cross-sections σ<sub>abs</sub> and scattering cross-sections σ<sub>sca</sub>, can provide valuable information about the geometry of the nanoparticles and the particle size. In this work, the extinction coefficient (σ) and the molar concentration (c) of gold nanoparticles (AuNPs), which formed at room temperature upon using dimethylamine borane (DMAB) to reduce the polymer of gold(I) 6-thioguanosine hydrogel, have been calculated. The formed AuNPs were characterized by using ultraviolet–visible spectroscopy (UV–Vis) and transmission electron microscopy (TEM) techniques. Absorption spectra can provide valuable information about the size, extinction coefficient, and concentration of nanoparticles.</p>

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Calculation of Extinction Coefficient and Molar Concentration of Gold Nanoparticles using UV–Vis Spectroscopy

  • 期刊论文

  • 发表日期：

    2025年3月28日

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  • Lamia L. G. Al-mahamad

摘要

Calculating the optical extinction cross-section (σext), which consists of absorption cross-sections σabs and scattering cross-sections σsca, can provide valuable information about the geometry of the nanoparticles and the particle size. In this work, the extinction coefficient (σ) and the molar concentration (c) of gold nanoparticles (AuNPs), which formed at room temperature upon using dimethylamine borane (DMAB) to reduce the polymer of gold(I) 6-thioguanosine hydrogel, have been calculated. The formed AuNPs were characterized by using ultraviolet–visible spectroscopy (UV–Vis) and transmission electron microscopy (TEM) techniques. Absorption spectra can provide valuable information about the size, extinction coefficient, and concentration of nanoparticles.