Monitoring catalytic degradation of dye molecules on silver-coated ZnO nanowire arrays by surface-enhanced Raman spectroscopy

2009 ◽  
Vol 19 (31) ◽  
pp. 5547 ◽  
Author(s):  
Xinmei Zhao ◽  
Baohua Zhang ◽  
Kelong Ai ◽  
Guo Zhang ◽  
Linyuan Cao ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Catalytic Degradation ◽  
Nanowire Arrays ◽  
Dye Molecules ◽  
Zno Nanowire ◽  
Zno Nanowire Arrays ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Surface-enhanced Raman spectroscopy employing monodisperse nickel nanowire arrays

2006 ◽  
Vol 88 (2) ◽  
pp. 023106 ◽  
Author(s):  
G. Sauer ◽  
G. Brehm ◽  
S. Schneider ◽  
H. Graener ◽  
G. Seifert ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Nanowire Arrays ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Nickel Nanowire

scholarly journals Surface-Enhanced Raman Spectroscopy of Dye and Thiol Molecules Adsorbed on Triangular Silver Nanostructures: A Study of Near-Field Enhancement, Localization of Hot-Spots, and Passivation of Adsorbed Carbonaceous Species

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Manuel R. Gonçalves ◽  
Fabian Enderle ◽  
Othmar Marti
Keyword(s):  
Raman Spectroscopy ◽  
Hot Spots ◽  
Near Field ◽  
Field Enhancement ◽  
Surface Enhanced Raman Spectroscopy ◽  
Spherical Particles ◽  
Silver Nanostructures ◽  
Dye Molecules ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Surface-enhanced Raman spectroscopy (SERS) of thiols and dye molecules adsorbed on triangular silver nanostructures was investigated. The SERS hot-spots are localized at the edges and corners of the silver triangular particles. AFM and SEM measurements permit to observe many small clusters formed at the edges of triangular particles fabricated by nanosphere lithography. Finite-element calculations show that near-field enhancements can reach values of more than 200 at visible wavelengths, in the gaps between small spherical particles and large triangular particles, although for the later no plasmon resonance was found at the wavelengths investigated. The regions near the particles showing strong near-field enhancement are well correlated with spatial localization of SERS hot-spots done by confocal microscopy. Silver nanostructures fabricated by thermal evaporation present strong and fast fluctuating SERS activity, due to amorphous carbon contamination. Thiols and dye molecules seem to be able to passivate the undesired SERS activity on fresh evaporated silver.

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