Some properties of spherical and rod-shaped semiconductor and metal nanocrystals

2002 ◽  
Vol 74 (9) ◽  
pp. 1675-1692 ◽  
Author(s):  
Christy F. Landes ◽  
Stephan Link ◽  
Mona B. Mohamed ◽  
Babak Nikoobakht ◽  
Mostafa A. El-Sayed
Keyword(s):  
Raman Scattering ◽  
Spherical Particle ◽  
Gold Nanorods ◽  
Self Assembly ◽  
Surrounding Medium ◽  
Cdse Nanocrystals ◽  
Size And Shape ◽  
Metal Nanocrystals ◽  
Enhanced Raman Scattering

In this paper, we summarize our results on the effect of changing size and shape of semiconductor and metallic nanocrystals. The change in size (from 3.5 to 1.1 nm) and shape (from spherical to rod) of CdSe nanocrystals is found to affect both their optical and nonradiative properties. In gold quasi-spherical nanocrystals, results on the dependence of the electron-phonon relaxation of the surrounding medium are presented. For gold nanorods, results and conclusions on the mechanism of their self-assembly are presented. Enhanced Raman scattering on their surfaces is studied and compared with that on spherical particle surfaces.

Synthesis and Vertical Self-Assembly of Gold Nanorods for Surface Enhanced Raman Scattering

2019 ◽  
Vol 48 (8) ◽  
pp. 4970-4976 ◽  
Author(s):  
Mai T. T. Nguyen ◽  
Dong H. Nguyen ◽  
My T. Pham ◽  
Hai V. Pham ◽  
Chinh D. Huynh
Keyword(s):  
Raman Scattering ◽  
Gold Nanorods ◽  
Self Assembly ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals Fabrication of transparent composites for non-invasive Surface Enhanced Raman Scattering (SERS) analysis of modern art works

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Abeer Alyami ◽  
Antonio Mirabile ◽  
Daniela Iacopino
Keyword(s):  
Raman Scattering ◽  
Self Assembly ◽  
Surface Enhanced Raman Scattering ◽  
Ag Nanoparticle ◽  
Non Invasive ◽  
Enhanced Sensitivity ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Invaluable Tool ◽  
Enhanced Raman Scattering

Abstract Surface Enhanced Raman Scattering (SERS) has become an invaluable tool for the identification of colorants in artworks, due to its enhanced sensitivity and ability to quench fluorescence interference compared to Raman spectroscopy. However, the application of SERS to artwork analysis is still limited by its inherent invasiveness and the need for extraction procedures. In this work non-invasive transparent SERS probes were fabricated by self-assembly of Ag nanoparticles into glass and PDMS surfaces and used for identification of dye content in artistic drawings. SERS measurements were performed directly on the selected analytical surfaces by laser back illumination through the SERS probe. The non-invasiveness of fabricated probes was tested by optical microscopy. It was found that Ag nanoparticle/glass probes left no Ag nanoparticle residue after four consecutive depositions on sacrificial surfaces, whereas Ag nanoparticle/PDMS composites could be deposited and subsequently peeled off the analytical surfaces leaving no contamination traces. The high conformability, flexibility and transparency of Ag nanoparticle/PDMS composites enabled good adhesion to the surface of analyzed artistic drawings and therefore the generation of in situ SERS spectra from artistic drawings. The use of this method allowed identification of main dye components in real artworks comprising a red BIC ballpoint drawing and a Japanese woodblock print.

scholarly journals Surface enhanced raman scattering of aromatic thiols adsorbed on nanostructured gold surfaces

2009 ◽  
Vol 7 (3) ◽  
pp. 446-453 ◽  
Author(s):  
Mamdouh Abdelsalam
Keyword(s):  
Raman Scattering ◽  
Electrochemical Deposition ◽  
Self Assembly ◽  
Surface Enhanced Raman Scattering ◽  
Nanostructured Films ◽  
Gold Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Nanostructured Gold ◽  
Enhanced Raman Scattering

AbstractIn this paper we describe the use of a simple and versatile technique of templated electrodeposition through polystyrene sphere templates to produce nanostructured films of gold with regular submicron spherical holes arranged in a hexagonal close-packed structure. The templates were produced by self assembly of a monodispersed suspension of polystyrene spheres on gold substrates using capillary forces. The self assembly process was modified through the chemical modification of the gold substrate with cysteamine thiol. Films of gold were prepared by electrochemical deposition through the template. The electrochemical deposition charge and the current time curve were used to control the film height with a precision of approximately 10 nm. The colour of the nanostructured films changed as the film thickness was changed. Surface enhanced Raman Scattering spectra were recorded and used to identify very low concentrations of aromatic thiol molecules, 4-Nitrobenzenethiol (4-NBT) and 4-Aminobenzenethiol (4-ABT), adsorbed on the surface of the nanostructured gold substrates.

Enhanced Raman scattering at the surface (SERS) of a spherical particle

1980 ◽  
Vol 19 (14) ◽  
pp. 2256 ◽  
Author(s):  
D.-S. Wang ◽  
H. Chew ◽  
M. Kerker
Keyword(s):  
Raman Scattering ◽  
Spherical Particle ◽  
Enhanced Raman Scattering

scholarly journals Molecular Detection and Analysis of Exosomes Using Surface-Enhanced Raman Scattering Gold Nanorods and a Miniaturized Device

Theranostics ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 2722-2738 ◽  
Author(s):  
Elyahb Allie Kwizera ◽  
Ryan O'Connor ◽  
Vojtech Vinduska ◽  
Melody Williams ◽  
Elizabeth R. Butch ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Gold Nanorods ◽  
Molecular Detection ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering
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