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

doi:10.3390/nano11061359

Cited by 15 publications

(9 citation statements)

References 37 publications

(38 reference statements)

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“…The two-dimensional structure is also not easy to capture target molecules in microfluidics. Metal or dielectric DNFs structure [ 10 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ] has complex three-dimensional cross-linking networks to fix many target molecules. Chan et al presented that the Ag dendrites formed and protected by a 2 nm SiO 2 film on a Si surface [ 17 ] demonstrated a high sensitivity of 10 −8 M R6G Raman response.…”

Section: Introductionmentioning

confidence: 99%

Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing

et al. 2021

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The effects of Au cores in Ag shells in enhancing surface-enhanced Raman scattering (SERS) were evaluated with samples of various Au/Ag ratios. High-density Ag shell/Au core dendritic nanoforests (Au@Ag-DNFs) on silicon (Au@Ag-DNFs/Si) were synthesized using the fluoride-assisted Galvanic replacement reaction method. The synthesized Au@Ag-DNFs/Si samples were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, reflection spectroscopy, X-ray diffraction, and Raman spectroscopy. The ultraviolet-visible extinction spectrum exhibited increased extinction induced by the addition of Ag when creating the metal DNFs layer. The pure Ag DNFs exhibited high optical extinction of visible light, but low SERS response compared with Au@Ag DNFs. The Au core (with high refractive index real part) in Au@Ag DNFs maintained a long-leaf structure that focused the illumination light, resulting in the apparent SERS enhancement of the Ag coverage.

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Section: Introductionmentioning

confidence: 99%

Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing

et al. 2021

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“…However, a low LOD for tricyclazole determination was calculated using a surface-enhanced Raman scattering (SERS) technique [ 27 , 28 , 42 , 43 ]. Thus, we are currently developing TMA-Au/AgNPs mixes that will be deposited on a SERS-active Au(Ag) substrate for enhanced tricyclazole sensitivity [ 44 – 51 ].…”

Section: Resultsmentioning

confidence: 99%

Selective detection of tricyclazole by optical technique using thiomalic acid–modified Au and Ag nanoparticle mixtures

Pan¹,

Wu²,

Hu³

et al. 2023

Journal of Food and Drug Analysis

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This study proposes the use of thiomalic acid–modified Au and Ag nanoparticle mixtures (TMA-Au/AgNP mixes) for the selective detection of tricyclazole. Upon the addition of tricyclazole, the color of TMA-Au/AgNP mixes solution changes from orange-red to lavender (red-shift). According to the density-functional theory calculations, tricyclazole-induced aggregation of TMA-Au/AgNP mixes through electron donor–acceptor interactions was proved. The sensitivity and selectivity of the proposed method are affected by the amount of TMA, volume ratio of TMA-AuNPs to TMA-AgNPs, pH value, and buffer concentration. The ratio of absorbance (A 654 /A 520 ) of TMA-Au/AgNP mixes solution is proportional to the concentration of tricyclazole over the range 0.1–0.5 ppm with a linear correlation (R 2 = 0.948). Moreover, the limit of detection was estimated at 0.028 ppm. The practicality of TMA-Au/AgNP mixes was validated for the determination of tricyclazole concentration in real samples (spiked recovery was 97.5%–105.2%), demonstrating its advantages of simplicity, selectivity, and sensitivity.

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“…57,58 Etching techniques are also used to create advanced nanostructures, 53 such as hollow nanostructures or hot spots. 55 Various etchants, including Fe(NO 3 ) 3 or NH 4 OH and hydrogen peroxide (H 2 O 2 ), can be employed to alter the shape of Ag nanostructures, and sometimes NH 4 OH combined with H 2 O 2 . Fe(NO 3 ) 3 or NH 4 OH have a significant role in the synthesis of Au nanoboxes.…”

Section: Etching Methodsmentioning

confidence: 99%

“…53 In the past, due to the excellent optical properties (plasmonic resonance) of Ag nanostructures, it has been an active area of research. 54,55 These qualities of AgNPs greatly rely on the composition, size, and shape of the silver. [56][57][58] Control over the shape of the nanoparticle is very important to amend the optical significance of the resulting nanostructures.…”

Section: Hybrid Silver Nanoparticles and Structuresmentioning

confidence: 99%

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Hybrid silver nanoparticles: Modes of synthesis and various biomedical applications

Singh,

Maddiboyina

et al. 2024

Electron

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In the present day, there is a growing trend of employing new strategies to synthesize hybrid nanoparticles, which involve combining various functionalities into a single nanocomposite system. These modern methods differ significantly from the traditional classical approaches and have emerged at the forefront of materials science. The fabrication of hybrid nanomaterials presents an unparalleled opportunity for applications in a wide range of areas, including therapy to diagnosis. The focus of this review article is to shed light on the different modalities of hybrid nanoparticles, providing a concise description of hybrid silver nanoparticles, exploring various modes of synthesis and classification of hybrid silver nanoparticles, and highlighting their advantages. Additionally, we discussed core‐shell silver nanoparticles and various types of core and shell combinations based on the material category, such as dielectric, metal, or semiconductor. The two primary classes of hybrid silver nanoparticles were also reviewed. Furthermore, various hybrid nanoparticles and their methods of synthesis were discussed but we emphasize silica as a suitable candidate for hybridization alongside metal nanoparticles. This choice is due to its hydrophilic surface qualities and high surface charge, which provide the desired repulsive forces to minimize aggregation between the metal nanoparticles in the liquid solution. Silica shell encapsulation also provides chemical inertness, robustness and the adaptability to the desired hybrid nanoparticle. Therefore, among all the materials used to coat metal nanoparticles; silica is highly approved.

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

Cited by 15 publications

References 37 publications

Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing

Au@Ag Dendritic Nanoforests for Surface-Enhanced Raman Scattering Sensing

Selective detection of tricyclazole by optical technique using thiomalic acid–modified Au and Ag nanoparticle mixtures

Hybrid silver nanoparticles: Modes of synthesis and various biomedical applications

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