Surface-enhanced Raman spectroscopic detection of molecular chemo- and plasmo-catalysis on noble metal nanoparticles

2018 ◽  
Vol 54 (19) ◽  
pp. 2326-2336 ◽  
Author(s):  
Wei Xie ◽  
Sebastian Schlücker
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Chemical Transformations ◽  
Raman Spectroscopic ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

The in situ detection of reactions catalyzed by metal NPs is challenging because the underlying chemical transformations occur at interfaces.

Heterogeneous gap-mode nanostructure for surface-enhanced Raman spectroscopic evaluation of charge transfer between noble metal nanoparticles and formaldehyde vapor

Nanoscale ◽  
2018 ◽  
Vol 10 (41) ◽  
pp. 19478-19483
Author(s):  
Dongha Shin
Keyword(s):  
Charge Transfer ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Raman Spectroscopic ◽  
Organic Vapor ◽  
Surface Enhanced ◽  
Formaldehyde Vapor ◽  
Surface Enhanced Raman ◽  
Gap Mode

The NC stretching bands in heterogeneous gap-mode nanostructures present the change of surface potential of noble metal nanoparticles interacting with organic vapor.

Finite-Size Effects and Surface-Enhanced Raman Scattering in Noble-Metal Nanoparticles

2004 ◽  
Vol 818 ◽  
Author(s):  
Vitaliy N. Pustovit ◽  
Tigran V. Shahbazyan
Keyword(s):  
Raman Scattering ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Finite Size ◽  
Surface Enhanced Raman Scattering ◽  
Noble Metal Nanoparticles ◽  
Raman Signal ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

AbstractWe study the role of a strong electron confinement on the surface-enhanced Raman scattering from molecules adsorbed on small noble-metal nanoparticles. We describe a novel enhancement mechanism which originates from the different effect that confining potential has on s-band and d-band electrons. We demonstrate that the interplay between finite-size and screening efects in the nanoparticle surface layer leads to an enhancement of the surface plasmon local field acting on a molecule located in a close proximity to the metal surface. Our calculations show that the additional enhancement of the Raman signal is especially strong for small nanometer-sized nanoparticles.

Monodisperse Noble-Metal Nanoparticles and Their Surface Enhanced Raman Scattering Properties

2008 ◽  
Vol 20 (22) ◽  
pp. 6939-6944 ◽  
Author(s):  
Chengmin Shen ◽  
Chao Hui ◽  
Tianzhong Yang ◽  
Congwen Xiao ◽  
Jifa Tian ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Surface Enhanced Raman Scattering ◽  
Noble Metal Nanoparticles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals TLC-SERS Plates with a Built-In SERS Layer Consisting of Cap-Shaped Noble Metal Nanoparticles Intended for Environmental Monitoring and Food Safety Assurance

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
H. Takei ◽  
J. Saito ◽  
K. Kato ◽  
H. Vieker ◽  
A. Beyer ◽  
...  
Keyword(s):  
Environmental Monitoring ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Food Additives ◽  
Skim Milk ◽  
Chemical Species ◽  
Noble Metal Nanoparticles ◽  
Surface Enhanced Raman ◽  
Mixture Samples

We report on a thin layer chromatograph (TLC) with a built-in surface enhanced Raman scattering (SERS) layer for in-situ identification of chemical species separated by TLC. Our goal is to monitor mixture samples or diluted target molecules suspended in a host material, as happens often in environmental monitoring or detection of food additives. We demonstrate that the TLC-SERS can separate mixture samples and provide in-situ SERS spectra. One sample investigated was a mixture consisting of equal portions of Raman-active chemical species, rhodamine 6 G (R6G), crystal violet (CV), and 1,2-di(4-pyridyl)ethylene (BPE). The three components could be separated and their SERS spectra were obtained from different locations. Another sample was skim milk with a trace amount of melamine. Without development, no characteristic peaks were observed, but after development, a peak was observed at 694 cm−1. Unlike previous TLC-SERS whereby noble metal nanoparticles are added after development of a sample, having a built-in SERS layer greatly facilitates analysis as well as maintaining high uniformity of noble metal nanoparticles.

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