EVIDENCE FOR LOW DENSITY OF ACTIVE SITES IN SURFACE-ENHANCED RAMAN SCATTERING

1983 ◽  
Vol 44 (C10) ◽  
pp. C10-333-C10-336 ◽  
Author(s):  
B. Pettinger ◽  
L. Moerl
Keyword(s):  
Raman Scattering ◽  
Active Sites ◽  
Surface Enhanced Raman Scattering ◽  
Low Density ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Mesoporous semiconducting TiO2 with rich active sites as a remarkable substrate for surface-enhanced Raman scattering

2017 ◽  
Vol 19 (28) ◽  
pp. 18731-18738 ◽  
Author(s):  
Libin Yang ◽  
Di Yin ◽  
Yu Shen ◽  
Ming Yang ◽  
Xiuling Li ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Raman Scattering ◽  
Active Sites ◽  
Surface Enhanced Raman Scattering ◽  
Transfer Mechanism ◽  
Charge Transfer Mechanism ◽  
Highly Active ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Mesoporous TiO2 with highly active sites was used as an effective and recyclable substrate for SERS contributed by the charge-transfer mechanism.

Nature of Surface-Enhanced-Raman-Scattering Active Sites on Coldly Condensed Ag Films

1983 ◽  
Vol 51 (25) ◽  
pp. 2314-2317 ◽  
Author(s):  
E. V. Albano ◽  
S. Daiser ◽  
G. Ertl ◽  
R. Miranda ◽  
K. Wandelt ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Active Sites ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals A DFT Approach to the Surface-Enhanced Raman Scattering of 4-Cyanopyridine Adsorbed on Silver Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1211 ◽  
Author(s):  
Isabel López-Tocón ◽  
Samuel Valdivia ◽  
Juan Soto ◽  
Juan Carlos Otero ◽  
Francesco Muniz-Miranda ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Active Sites ◽  
Density Functional ◽  
Surface Enhanced Raman Scattering ◽  
Sers Spectrum ◽  
Functional Theory ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

A Surface-Enhanced Raman Scattering (SERS) spectrum of 4-cyanopyridine (4CNPy) was recorded on silver plasmonic nanoparticles and analyzed by using Density Functional Theory (DFT) calculations. Two simple molecular models of the metal–4CNPy surface complex with a single silver cation or with a neutral dimer (Ag+–4CNPy, Ag2–4CNPy), linked through the two possible interacting sites of 4CNPy (aromatic nitrogen, N, and nitrile group, CN), were considered. The calculated vibrational wavenumbers and intensities of the adsorbate and the isolated species are compared with the experimental Raman and SERS results. The analysis of the DFT predictions and the experimental data indicates that 4CNPy adsorbs preferentially on neutral/charged active sites of the silver nanoparticles through the nitrogen atom of the aromatic ring with a perpendicular orientation.

Small cavities as major active sites for surface enhanced raman scattering

1985 ◽  
Vol 158 (1-3) ◽  
pp. A421
Author(s):  
H. Seki ◽  
T.J. Chuang ◽  
J.F. Escobar ◽  
H. Morawitz ◽  
E.V. Albano
Keyword(s):  
Raman Scattering ◽  
Active Sites ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Small cavities as major active sites for surface enhanced Raman scattering

1985 ◽  
Vol 158 (1-3) ◽  
pp. 254-262 ◽  
Author(s):  
H. Seki ◽  
T.J. Chuang ◽  
J.F. Escobar ◽  
H. Morawitz ◽  
E.V. Albano
Keyword(s):  
Raman Scattering ◽  
Active Sites ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The Fabrication of Ag Nanostructure Array Integrated with Microfluidics for Surface Enhanced Raman Scattering

2011 ◽  
Vol 483 ◽  
pp. 281-286
Author(s):  
Zhao Xin Geng ◽  
Wen Liu ◽  
Xuan Ye Wang ◽  
Xiao Dong Wang ◽  
Zhi Hong Li ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Single Molecule ◽  
Active Sites ◽  
Large Scale ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Surface-enhanced Raman scattering (SERS) with enormous enhancements has shown great potential in single-molecule detection, however, the fabrication of large-scale, controllable and reproducible substrates with high SERS activity is a major limitation. This paper provides method to create wafer level SERS substrate with tunable nanoparticle sizes and interparticle gaps. Silver films with different thicknesses were deposited by electron beam evaporation (EBE) and annealed at 260 °C for 15min in nitrogen gas. When annealed, the thin Ag films break up under surface tension to form isolated nanoparticle. The nanoparticle size, density, and shape are found to be dependent on the thickness of Ag and the condition of annealing. The selective deposition of Ag nanoparticle on the silicon substrate is applied to create SERS active sites before the integration with a PDMS microfluidic chip which functions as a sample delivery device and a transparent optical window for SERS. Detections of Rhodamine 6G SERS spectra are accomplished by using a 633nm laser with 300W excitation power. The results show that the fabrication protocol of such a SERS substrate is low-cost, easy-fabrication and inexpensive. Therefore, this substrate may anticipate a wide range of applications in SERS-based sensors.

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