Influence of Sodium Borohydride Content on Triangular Silver Nanoprisms Dropped on Copper Hydroxide Nanowire-Based SERS Substrates

IF 3.7 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY ACS Omega Pub Date : 2024-11-15 DOI:10.1021/acsomega.4c0681810.1021/acsomega.4c06818

Daniela González-Zárate, José Luis Zamora-Navarro, María Beatriz de la Mora, Guillermo Santana-Rodríguez, Mario Díaz-Solís and Luis Zamora-Peredo*,

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Abstract

In this work, surface-enhanced Raman scattering substrates with triangular silver nanoprisms (AgNPrs) dropped on copper hydroxide nanowires (CuOHNWs) were evaluated. AgNPrs were synthesized in colloidal solution using Ag nitrate, polyvinylpyrrolidone, trisodium citrate dihydrate, hydrogen peroxide, and sodium borohydride (NaBH₄). A set of five solutions with volume percentages from 0.99 to 4.76% v/v of NaBH₄ as reducing agents was studied. The reaction time associated with blue coloration was determined. The evolution of the colloids was studied by UV–vis spectroscopy over a period of 42 days, confirming the good stability of AgNPrs. In addition, their colloidal stability was also verified by the zeta potential. The influence of NaBH₄ concentration over the AgNPrs morphology was studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and dynamic light scattering (DLS). Finally, SERS substrates were fabricated with AgNPrs deposited on CuOHNW and used to detect methylene blue as a probe molecule. AgNPrs obtained with 2.91% v/v NaBH₄ presented the smallest sizes, and their SERS substrate presented the best Raman intensity.

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硼氢化钠含量对滴落在氢氧化铜纳米线 SERS 基底上的三角形银纳米棱镜的影响

本研究对氢氧化铜纳米线（CuOHNWs）上滴有三角形银纳米颗粒（AgNPrs）的表面增强拉曼散射基底进行了评估。AgNPrs 是用硝酸银、聚乙烯吡咯烷酮、二水柠檬酸三钠、过氧化氢和硼氢化钠 (NaBH4) 在胶体溶液中合成的。研究了一组五种溶液，其中 NaBH4 的体积百分比从 0.99% 到 4.76% v/v 不等。确定了与蓝色着色相关的反应时间。通过紫外-可见光谱法研究了胶体在 42 天内的变化情况，结果表明 AgNPrs 具有良好的稳定性。此外，它们的胶体稳定性也通过 zeta 电位得到了验证。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）和动态光散射（DLS）研究了 NaBH4 浓度对 AgNPrs 形态的影响。最后，用沉积在 CuOHNW 上的 AgNPrs 制作了 SERS 基底，并用于检测探针分子亚甲基蓝。用 2.91% v/v NaBH4 制备的 AgNPrs 尺寸最小，其 SERS 基底的拉曼强度也最好。

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来源期刊

ACS Omega Chemical Engineering-General Chemical Engineering

CiteScore

6.60

自引率

4.90%

发文量

3945

审稿时长

2.4 months

期刊介绍： ACS Omega is an open-access global publication for scientific articles that describe new findings in chemistry and interfacing areas of science, without any perceived evaluation of immediate impact.

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