Improved surface-enhanced Raman scattering on electrochemically roughened silver substrates prepared in bielectrolyte solutions

Liu, Yu Chuan; Wang, Cheng C.; Tsai, Jeng Feng

doi:10.1016/j.aca.2006.10.060

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…Since the first report of the large increase in Raman scattering for molecules adsorbed on a roughened silver electrode, surface‐enhanced Raman scattering (SERS) has gained large attention because of its potential to be an extremely sensitive means for analytical applications . In the past years, SERS studies have been focused on the production and characterization of the metallic nanoparticles with different sizes, shapes, and compositions by a wide variety of methods such as vapor deposition, electrochemical, and chemical deposition . Besides the morphologies of individual metallic nanostructures, the arrangement of the nanostructures and the space between the nanostructures in forming the so‐called hot spot contribute an additional enhancement effect .…”

Section: Introductionmentioning

confidence: 99%

Photochemical decoration of silver nanoparticles on ZnO nanowires as a three‐dimensional substrate for surface‐enhanced Raman scattering measurement

Satheeshkumar

Yang

2014

J Raman Spectroscopy

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To increase the sensitivity in surface‐enhanced Raman scattering (SERS) measurement, a three‐dimensional (3D) SERS substrate was prepared by the decoration of silver nanoparticles (AgNPs) on the side walls of ZnO nanowires. The prepared 3D SERS substrates provide the advantages of highly loaded density of AgNPs, with a large specific surface area to interact with analytes, and the ease for the analytes to access the surfaces of AgNPs. To prepare the substrates, ZnO nanowires were first grown on a glass plate by wet chemical method. By treating SnCl2 on the surfaces of ZnO nanowires, Ag seeds could be formed on the side wall of the ZnO nanowires, which were further grown to a suitable size for SERS measurements via photochemical reduction. To optimize and understand the influences of the parameters used in preparation of the substrates, the reaction conditions were systematically adjusted and examined. Results indicated that AgNPs could be successfully decorated on the side wall of the ZnO nanowires only by the assistances of SnCl2. The size and density of AgNPs were affected by both the concentration of silver nitrate and the irradiation time. With optimized condition, the prepared 3D substrates provided an enhancement factor approaching 7 orders of magnitude compared with conventional Raman intensity. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Photochemical decoration of silver nanoparticles on ZnO nanowires as a three‐dimensional substrate for surface‐enhanced Raman scattering measurement

Satheeshkumar

Yang

2014

J Raman Spectroscopy

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“…An electrode modified with metal NPs, such as Pt NPs [11][12][13][14], Au NPs [15][16][17], Pd NPs [18] and Ag NPs [3], has been widely used to prepare H 2 O 2 sensors due to their large specific surface area, excellent conductivity and extraordinary electrocatalytic activities. As typical nanomaterials, the controllable Ag NPs attached to a surface have been prepared for its good activity in SERS [19][20][21] and catalysis [22,23]. Recent studies have shown that the nanosized Ag NPs exhibited good catalytic activity for H 2 O 2 [24].…”

Section: Introductionmentioning

confidence: 99%

The electrodeposition of Ag nanoparticles on a type I collagen-modified glassy carbon electrode and their applications as a hydrogen peroxide sensor

Song¹,

Kang²,

Wang³

et al. 2009

Nanotechnology

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Silver nanoparticles (Ag NPs) attached to type I collagen-modified glassy carbon (GC) electrodes were successfully synthesized by the electrodepositing method. Atomic force microscopy images showed that many Ag NPs with homogeneous size were formed and uniformly distributed on the type I collagen/GC electrode. The amount, size and distribution of Ag NPs could be controlled by the collagen. The results of electrochemical experiments showed that Ag NPs had an excellent catalytic ability for the reduction of hydrogen peroxide (H(2)O(2)), suggesting that they could be used as a sensor to determine H(2)O(2). The good catalytic activity of the Ag NPs was ascribed to the type I collagen that resulted in the homogeneous distribution of Ag NPs with small size. The effects of type I collagen concentration and electrodeposition time on Ag NPs were investigated. When the Ag NPs were used as a sensor to determine H(2)O(2), the sensor could achieve 95% of the steady-state current in less than 2 s and had a linear range of 5.0 microM to 40.6 mM and a 0.7 microM detection limit of H(2)O(2) at a signal-to-noise ratio of 3.

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Surface‐enhanced Raman spectroscopy on novel black silicon‐based nanostructured surfaces

Talian

Mogensen

Oriňák

et al. 2009

J Raman Spectroscopy

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Two different black silicon nanostructured surfaces modified with thin gold layers were tested for analytical signal enhancement with Surface-Enhanced Raman Spectroscopy (SERS). The relationship between the thicknesses of the gold layers and the analytical signal enhancement was studied. Also, effects of Ti and Ti/Pt adhesion layers underneath the gold layers on the analytical signal enhancement were tested. An enhancement factor of 7.6 × 10 7 with the excitation laser 785 nm was achieved for the tested analyte, Rhodamine 6G, and non-resonance SER spectra were recorded in a 5 s acquisition mode. Such an enhancement enables to achieve a detection limit down to 2.4 pg of Rhodamine 6G on a black silicon-based nanosurface coated with a 400-nm-thin layer of gold.

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Improved surface-enhanced Raman scattering on electrochemically roughened silver substrates prepared in bielectrolyte solutions

Cited by 7 publications

References 44 publications

Photochemical decoration of silver nanoparticles on ZnO nanowires as a three‐dimensional substrate for surface‐enhanced Raman scattering measurement

Photochemical decoration of silver nanoparticles on ZnO nanowires as a three‐dimensional substrate for surface‐enhanced Raman scattering measurement

The electrodeposition of Ag nanoparticles on a type I collagen-modified glassy carbon electrode and their applications as a hydrogen peroxide sensor

Surface‐enhanced Raman spectroscopy on novel black silicon‐based nanostructured surfaces

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