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Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications

Dendritic forest-like Ag nanostructures were deposited on a silicon wafer through fluoride-assisted galvanic replacement reaction (FAGRR) in aqueous AgNO(3) and buffered oxide etchant. The prepared nanostructures were characterized using scanning electron microscopy, energy-dispersive X-ray spectros...

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Autores principales: Shiao, Ming-Hua, Wu, Tsunghsueh, Huang, Hung Ji, Peng, Ching-Yi, Lin, Yung-Sheng, Lai, Ting-Yu, Lin, Yang-Wei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8223998/
https://www.ncbi.nlm.nih.gov/pubmed/34063866
http://dx.doi.org/10.3390/nano11061359
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author Shiao, Ming-Hua
Wu, Tsunghsueh
Huang, Hung Ji
Peng, Ching-Yi
Lin, Yung-Sheng
Lai, Ting-Yu
Lin, Yang-Wei
author_facet Shiao, Ming-Hua
Wu, Tsunghsueh
Huang, Hung Ji
Peng, Ching-Yi
Lin, Yung-Sheng
Lai, Ting-Yu
Lin, Yang-Wei
author_sort Shiao, Ming-Hua
collection PubMed
description Dendritic forest-like Ag nanostructures were deposited on a silicon wafer through fluoride-assisted galvanic replacement reaction (FAGRR) in aqueous AgNO(3) and buffered oxide etchant. The prepared nanostructures were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma–optical emission spectroscopy, a surface profiler (alpha step), and X-ray diffraction. Additionally, the dendritic forest-like Ag nanostructures were characterized using surface-enhanced Raman scattering (SERS) when a 4-mercaptobenzoic acid (4-MBA) monolayer was adsorbed on the Ag surface. The Ag nanostructures exhibited intense SERS signal from 4-MBA because of their rough surface, and this intense signal led to an intense local electromagnetic field upon electromagnetic excitation. The enhancement factor for 4-MBA molecules adsorbed on the Ag nanostructures was calculated to be 9.18 × 10(8). Furthermore, common Raman reporters such as rhodamine 6G, 4-aminothiolphenol, 5,5′-dithiobis-2-nitrobenzoic acid, and carboxyfluorescein (FAM) were characterized on these dendritic forest-like Ag nanostructures, leading to the development of an ultrasensitive SERS-based DNA sensor with a limit of detection of 33.5 nM of 15-mer oligonucleotide.
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spelling pubmed-82239982021-06-25 Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications Shiao, Ming-Hua Wu, Tsunghsueh Huang, Hung Ji Peng, Ching-Yi Lin, Yung-Sheng Lai, Ting-Yu Lin, Yang-Wei Nanomaterials (Basel) Article Dendritic forest-like Ag nanostructures were deposited on a silicon wafer through fluoride-assisted galvanic replacement reaction (FAGRR) in aqueous AgNO(3) and buffered oxide etchant. The prepared nanostructures were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma–optical emission spectroscopy, a surface profiler (alpha step), and X-ray diffraction. Additionally, the dendritic forest-like Ag nanostructures were characterized using surface-enhanced Raman scattering (SERS) when a 4-mercaptobenzoic acid (4-MBA) monolayer was adsorbed on the Ag surface. The Ag nanostructures exhibited intense SERS signal from 4-MBA because of their rough surface, and this intense signal led to an intense local electromagnetic field upon electromagnetic excitation. The enhancement factor for 4-MBA molecules adsorbed on the Ag nanostructures was calculated to be 9.18 × 10(8). Furthermore, common Raman reporters such as rhodamine 6G, 4-aminothiolphenol, 5,5′-dithiobis-2-nitrobenzoic acid, and carboxyfluorescein (FAM) were characterized on these dendritic forest-like Ag nanostructures, leading to the development of an ultrasensitive SERS-based DNA sensor with a limit of detection of 33.5 nM of 15-mer oligonucleotide. MDPI 2021-05-21 /pmc/articles/PMC8223998/ /pubmed/34063866 http://dx.doi.org/10.3390/nano11061359 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shiao, Ming-Hua
Wu, Tsunghsueh
Huang, Hung Ji
Peng, Ching-Yi
Lin, Yung-Sheng
Lai, Ting-Yu
Lin, Yang-Wei
Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications
title Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications
title_full Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications
title_fullStr Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications
title_full_unstemmed Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications
title_short Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications
title_sort dendritic forest-like ag nanostructures prepared using fluoride-assisted galvanic replacement reaction for sers applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8223998/
https://www.ncbi.nlm.nih.gov/pubmed/34063866
http://dx.doi.org/10.3390/nano11061359
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