Improved surfaced-enhanced Raman scattering based on electrochemically roughened silver substrates modified through argon plasma treatment

Wang, Chee-Chan; Chen, Jr-Shiuan

doi:10.1016/j.electacta.2008.02.117

Cited by 8 publications

(5 citation statements)

References 48 publications

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“…Figure shows the result of Raman spectrum of BPy adsorbed on the Au/SiO 2 NCs prepared in 0.1 M HCl and 0.1 M KCl in the presence of SiO 2 before and after ORC treatments. The bands shown in these spectra are characteristics of BPy on Raman spectrum . The results also demonstrate similar phenomena.…”

Section: Results and Discussionsupporting

confidence: 73%

“…The bands shown in these spectra are characteristics of BPy on Raman spectrum. 54 The results also demonstrate similar phenomena. The SERS intensity of BPy observed on the Au/SiO 2 NCs prepared in 0.1 M KCl in the presence of SiO 2 before ORC treatment exhibits a higher relative intensity more than 1 order of magnitude, as compared with those observed on the Au/SiO 2 NCs prepared in 0.…”

Section: Acs Applied Materials and Interfacessupporting

confidence: 61%

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Surface-Enhanced Raman Scattering-Active Au/SiO₂ Nanocomposites Prepared Using Sonoelectrochemical Pulse Deposition Methods

Chang

Yang²,

Liu³

et al. 2012

ACS Appl. Mater. Interfaces

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For improving signals, reproducibility, and stabilities of surface-enhanced Raman scattering (SERS), numerous technologies have recently been reported in the literature. However, the fabrication processes are usually complicated. It is well-known that nanoparticles (NPs) of Au and SiO(2) are SERS active and inactive materials, respectively. In this work, a simple synthesis route based on sonoelectrochemical pulse deposition (SEPD) methods has been developed to synthesize effectively SERS-active Au/SiO(2) nanocomposites (NCs) with an enhancement factor of 5.4 × 10(8). Experimental results indicate that pH value of solution and addition of SiO(2) NPs before and after oxidation-reduction cycles (ORCs) can significantly influence the corresponding SERS activities. Encouragingly, the SERS of Rhodamine 6G (R6G) adsorbed on the developed Au/SiO(2) NCs exhibits a higher intensity by more than 1 order of magnitude, as compared with that of R6G adsorbed on Au NPs synthesized using the same method. Moreover, this improved SERS activity is successfully verified from the mechanisms of electromagnetic (EM) and chemical (CHEM) enhancements.

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Section: Results and Discussionsupporting

confidence: 73%

Section: Acs Applied Materials and Interfacessupporting

confidence: 61%

Surface-Enhanced Raman Scattering-Active Au/SiO₂ Nanocomposites Prepared Using Sonoelectrochemical Pulse Deposition Methods

Chang

Yang²,

Liu³

et al. 2012

ACS Appl. Mater. Interfaces

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“…As shown in Figure S1 , AFM images of the plasma treated metal surfaces showed an initial rapid increase followed by a plateau after nearly 20 min exposure. Over this time frame, the total increase in mean surface roughness (Ra) was over 40%, as expected [ 39 , 40 ]. The resulting plasmonic absorption bands were observed from UV-Vis spectra collected in diffuse spectral reflectance mode.…”

Section: Experimental Design and Methodssupporting

confidence: 81%

A Microfluidic Bioreactor with in Situ SERS Imaging for the Study of Controlled Flow Patterns of Biofilm Precursor Materials

Paquet-Mercier

Aznaveh

Safdar

et al. 2013

Sensors

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A microfluidic bioreactor with an easy to fabricate nano-plasmonic surface is demonstrated for studies of biofilms and their precursor materials via Surface Enhanced Raman Spectroscopy (SERS). The system uses a novel design to induce sheath flow confinement of a sodium citrate biofilm precursor stream against the SERS imaging surface to measure spatial variations in the concentration profile. The unoptimised SERS enhancement was approximately 2.5 × 104, thereby improving data acquisition time, reducing laser power requirements and enabling a citrate detection limit of 0.1 mM, which was well below the concentrations used in biofilm nutrient solutions. The flow confinement was observed by both optical microscopy and SERS imaging with good complementarity. We demonstrate the new bioreactor by growing flow-templated biofilms on the microchannel wall. This work opens the way for in situ spectral imaging of biofilms and their biochemical environment under dynamic flow conditions.

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“…Electrochemical treatment of the silver nanowire membrane was carried out by CV. CV is often used to reform precious metal materials to increase the performance of SERS substrates [ 38 , 39 , 40 ]. In this method, the scanning voltage within a certain potential range is applied repeatedly when the silver nanowire membrane used as the working electrode in a three-electrode system alternately undergoes oxidation and reduction reactions multiple times.…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Activity of Silver Nanowire Membranes by Electrochemical Cyclic Voltammetry as Highly Sensitive Flexible SERS Substrate for On-Site Analysis

2021

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The development of high-quality flexible surface-enhanced Raman spectroscopy (SERS) substrates is crucial for developing rapid SERS analysis in situ. Silver nanowire membranes as novel flexible substrates could benefit from the high collection efficiency of analytes by wrapping complex surfaces or wiping the surfaces of samples. However, their low SERS performance impedes further applications of silver nanowire membranes in analyte detection. Herein, we report an ultra-high-sensitivity silver nanowire membrane synthesized by a simple and time-saving cyclic voltammetry (CV) method. After CV treatment, a part of the silver nanowires on the silver nanowire membrane turned into small nanoparticles and nanorods. This nanostructure’s reconstitution increased the analytical enhancement factor of silver nanowire membranes by 14.4 times. Scanning and transmission electron microscopy, UV-vis spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were employed to investigate the transformation in the membrane nanostructure. The CV-treated substrates exhibited high surface-enhanced Raman activity and good temporal stability. The limits of detection (LODs) for p-aminothiophenol, crystal violet, tetramethylthiuram disulfide, sodium perchlorate, malachite green, fluoranthene, and potassium nitrate are 3.7 × 10−12 M, 5.1 × 10−11 M, 5.4 × 10−11 M, 6.3 × 10−9 M, 0.00693 ng, 0.0810 ng, and 0.0273 ng on this substrate, respectively. Additionally, the developed substrate is feasible for the detection of crystal violet in real samples. These results certify that CV-treated substrates possess broad application prospects in on-site SERS analysis.

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Improved surfaced-enhanced Raman scattering based on electrochemically roughened silver substrates modified through argon plasma treatment

Cited by 8 publications

References 48 publications

Surface-Enhanced Raman Scattering-Active Au/SiO₂ Nanocomposites Prepared Using Sonoelectrochemical Pulse Deposition Methods

Surface-Enhanced Raman Scattering-Active Au/SiO₂ Nanocomposites Prepared Using Sonoelectrochemical Pulse Deposition Methods

A Microfluidic Bioreactor with in Situ SERS Imaging for the Study of Controlled Flow Patterns of Biofilm Precursor Materials

Enhancing the Activity of Silver Nanowire Membranes by Electrochemical Cyclic Voltammetry as Highly Sensitive Flexible SERS Substrate for On-Site Analysis

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Improved surfaced-enhanced Raman scattering based on electrochemically roughened silver substrates modified through argon plasma treatment

Cited by 8 publications

References 48 publications

Surface-Enhanced Raman Scattering-Active Au/SiO2 Nanocomposites Prepared Using Sonoelectrochemical Pulse Deposition Methods

Surface-Enhanced Raman Scattering-Active Au/SiO2 Nanocomposites Prepared Using Sonoelectrochemical Pulse Deposition Methods

A Microfluidic Bioreactor with in Situ SERS Imaging for the Study of Controlled Flow Patterns of Biofilm Precursor Materials

Enhancing the Activity of Silver Nanowire Membranes by Electrochemical Cyclic Voltammetry as Highly Sensitive Flexible SERS Substrate for On-Site Analysis

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Product

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Surface-Enhanced Raman Scattering-Active Au/SiO₂ Nanocomposites Prepared Using Sonoelectrochemical Pulse Deposition Methods

Surface-Enhanced Raman Scattering-Active Au/SiO₂ Nanocomposites Prepared Using Sonoelectrochemical Pulse Deposition Methods