A green approach for the synthesis of silver dendrites and their superior SERS performance

Tang, Jing; Yu, Mo; Jiang, Tao; Wang, Enyan; Ge, Chunli; Chen, Zhirong

doi:10.1016/j.ijleo.2017.02.041

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…The Raman peaks in Figure 1 were found at 365, 519, 681, 713, 771, 840, 932, 1012, 1074, 1135, 1180, 1380, 1476, and 1584 cm −1 . The observed vibration modes are shown in Table 1 [ 23 , 24 , 25 , 26 , 27 ]. The Raman peaks at 1584 and 1476 cm −1 were assigned to 9a and 15, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…This normal Raman spectrum can be used for calculating Raman EF in the later section. Although the peak positions and intensities of the Raman spectra would be varied by different substrate, most of the Raman peaks are similar [ 26 ]. Additionally, the Raman peak at 519 cm −1 can be found in all spectra (in black, red and blue line) and arises from the silicon wafer.…”

Section: Resultsmentioning

confidence: 99%

“…Besides plasmonic effect, surface roughness and surface area of the prepared dendritic forest-like Ag nanostructures—which were also attributed to the greater electromagnetic field enhancement and number of adsorption sites, respectively—led to a dramatic increase in the SERS intensity and EF value. In addition, a similar-morphology-structure substrate was found by Ge and Chen [ 26 ], but optimized combination procedure was not performed in the study, as a result of a lower EF value was provided for their proposed substrate. Table 2 represents that fabrication method and EFs of various flower-like Ag substrates.…”

Section: Resultsmentioning

confidence: 99%

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

Shiao

Huang

et al. 2021

Nanomaterials

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Dendritic forest-like Ag nanostructures were deposited on a silicon wafer through fluoride-assisted galvanic replacement reaction (FAGRR) in aqueous AgNO3 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 × 108. 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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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

Shiao

Huang

et al. 2021

Nanomaterials

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“…Ultra-sensitive detection of trace amounts of chemicals has emerged due to the importance of environmental protection, biological detection and medical diagnosis. The surface-enhanced Raman scattering (SERS) is a powerful spectroscopic technique for ultrasensitive and selective bio-chemical detection [1][2][3][4][5], due to its capability of providing "fingerprint" of information of ©2021 Vietnam Academy of Science and Technology molecular structures in low concentrations [6][7][8]. The enhancement mechanism of SERS has been explained by the highly local enhanced electromagnetic field on the noble metal surface due to the excitation of localized surface plasmon resonances and enhanced chemical interaction between the adsorbate and noble metal nanoparticles [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Detection of Ultra-Low Concentration of Methylene Blue by Porous Silicon Photonic Crystals Covered With Siver Nanoparticles as Efficient Sers Substrate

Nguyen

Pham

et al. 2021

Comm. in Phys.

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In this work, porous silicon photonic crystals (PSi PhCs) covered by silver nanoparticles (AgNPs) were prepared as surface-enhanced Raman scattering (SERS) substrate to detect methylene blue (MB) at low concentrations. The limit of MB detection in water by the SERS substrate is evaluated to be 10\(^{-10}\) mol/L. The SERS signal intensities of 446 cm\(^{-1}\) and 1623 cm\(^{-1}\) peaks in SERS spectra of MB are fit in exponential functions of concentrations ranging from 10\(^{-4}\) to 10\(^{-10}\) mol/L. These results show that the AgNPs on PSi PhCs substrates could be applied in environmental sensing.

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“…The ionic form of silver (Ag + ) is an eco-friendly antimicrobial that can be used against several fungal and bacterial pathogens. Moreover, among metal nanoparticles, AgNPs are a promising candidate for Surface Enhanced Raman Scattering (SERS) applications because of their high optical cross section in the visible region [23]. 1D metal nanostructures have several applications that are unattainable with nanospheres [2,24].…”

Section: Introductionmentioning

confidence: 99%

Polyol Silver Nanowire Synthesis and the Outlook for a Green Process

Hemmati

Harris

Barkey

2020

Journal of Nanomaterials

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Silver nanowires (AgNWs) have a broad range of applications including nanoelectronics, energy conversion, health care, solar cells, touch screens, sensors and biosensors, wearable electronics, and drug delivery systems. As their characteristics depend strongly on their size and morphology, it is essential to find the optimal and most cost-effective synthesis method with precise control over the size and morphology of the wires. Various methods for AgNW synthesis have been reported along with process optimization and novel techniques to increase the yield and aspect ratios of synthesized AgNWs. The most promising processes for synthesis of AgNWs are wet chemical techniques, in which the polyol process is low cost and simple and provides high yield compared to other chemical methods. Reaction mechanism is one of the most important factors in strategies to control the process. Our purpose here is to provide an overview on the main findings regarding synthesis, preparation, and characterization of AgNWs. Recent efforts in the polyol synthesis of AgNWs are summarized with respect to product morphology and size, reaction conditions, and characterization techniques. The effect of essential factors such as reagent concentration and preparation, temperature, and reaction atmosphere that control the size, morphology, and yield of synthesized AgNWs is reviewed. Moreover, a review on the novel modified polyol process and reactor design such as continuous millifluidic and flow reactors to increase the yield of synthesized AgNWs on large scales is provided. The most recent proposed growth mechanisms and kinetics behind the polyol process are addressed. Finally, comparatively few available studies in green and sustainable development of 1D silver nanostructures through the application of natural products with inherent growth termination, stabilization, and capping characteristics are reviewed to provide an avenue to natural synthesis pathways to AgNWs. Future directions in both chemical and green synthesis approaches of AgNWs are addressed.

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A green approach for the synthesis of silver dendrites and their superior SERS performance

Cited by 7 publications

References 26 publications

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

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

Detection of Ultra-Low Concentration of Methylene Blue by Porous Silicon Photonic Crystals Covered With Siver Nanoparticles as Efficient Sers Substrate

Polyol Silver Nanowire Synthesis and the Outlook for a Green Process

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