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硼氢化钠含量对滴涂在基于氢氧化铜纳米线的表面增强拉曼散射（SERS）基底上的三角形银纳米棱镜的影响。

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

作者信息

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

机构信息

Centro de Investigación en Micro y Nanotecnología, Universidad Veracruzana, Boca del Río, Veracruz 94294, Mexico.

Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México Ciudad Universitaria, Delegación Coyoacán, CDMX 04510, Mexico.

出版信息

ACS Omega. 2024 Nov 15;9(47):46997-47004. doi: 10.1021/acsomega.4c06818. eCollection 2024 Nov 26.

DOI:10.1021/acsomega.4c06818
PMID:39619555
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11603320/
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 (NaBH). A set of five solutions with volume percentages from 0.99 to 4.76% v/v of NaBH 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 NaBH 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 NaBH presented the smallest sizes, and their SERS substrate presented the best Raman intensity.

摘要

在这项工作中，对滴涂在氢氧化铜纳米线（CuOHNWs）上的具有三角形银纳米棱镜（AgNPrs）的表面增强拉曼散射基底进行了评估。使用硝酸银、聚乙烯吡咯烷酮、二水合柠檬酸三钠、过氧化氢和硼氢化钠（NaBH）在胶体溶液中合成AgNPrs。研究了一组五种溶液，其中NaBH作为还原剂的体积百分比为0.99%至4.76% v/v。确定了与蓝色显色相关的反应时间。通过紫外-可见光谱在42天的时间内研究了胶体的演变，证实了AgNPrs具有良好的稳定性。此外，还通过zeta电位验证了它们的胶体稳定性。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NaBH浓度对AgNPrs形态的影响。最后，制备了将AgNPrs沉积在CuOHNW上的SERS基底，并用于检测亚甲基蓝作为探针分子。用2.91% v/v NaBH获得的AgNPrs尺寸最小，其SERS基底呈现出最佳的拉曼强度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/14085732d4a2/ao4c06818_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/b67636dedccc/ao4c06818_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/3d46b296af4d/ao4c06818_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/0e0e9ea96f86/ao4c06818_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/fed4dabef217/ao4c06818_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/db7293548d86/ao4c06818_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/bcf359e0ffef/ao4c06818_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/14085732d4a2/ao4c06818_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/b67636dedccc/ao4c06818_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/3d46b296af4d/ao4c06818_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/0e0e9ea96f86/ao4c06818_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/fed4dabef217/ao4c06818_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/db7293548d86/ao4c06818_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/bcf359e0ffef/ao4c06818_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4b47/11603320/14085732d4a2/ao4c06818_0007.jpg

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