Enhancement of molecular orientation by surface enhanced visible absorption of dye molecules in the vicinity of gold nano-antennas

2021 ◽  
Author(s):  
Zouheir Sekkat ◽  
Siham Refki ◽  
Sanaa Elhani
Keyword(s):  
Molecular Orientation ◽  
Dye Molecules ◽  
Visible Absorption ◽  
Surface Enhanced ◽  
Nano Antennas

scholarly journals Surface Enhanced Visible Absorption of Dye Molecules in the Near-Field of Gold Nanoparticles

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
S. Elhani ◽  
H. Ishitobi ◽  
Y. Inouye ◽  
A. Ono ◽  
S. Hayashi ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Near Field ◽  
Dye Molecules ◽  
Visible Absorption ◽  
Surface Enhanced

scholarly journals The surface-enhanced resonance Raman scattering of dye molecules adsorbed on two-dimensional titanium carbide Ti3C2Tx (MXene) film

2020 ◽  
Vol 1 (2) ◽  
pp. 146-152 ◽  
Author(s):  
Satheeshkumar Elumalai ◽  
John R. Lombardi ◽  
Masahiro Yoshimura
Keyword(s):  
Raman Scattering ◽  
Titanium Carbide ◽  
Crystal Violet ◽  
Enhancement Factor ◽  
Resonance Raman ◽  
Raman Signal ◽  
Two Dimensional ◽  
Dye Molecules ◽  
Resonance Raman Scattering ◽  
Surface Enhanced

The resonance Raman signal enhancement of crystal violet dyes onto the two-dimensional MXene–Ti3C2Tx film, so called MXenes-enhanced resonance Raman scattering (MERRS), is reported with a calculated enhancement factor of 3.42 × 109.

scholarly journals Spectroelectrochemical Investigation of the Interaction of Adenine with Pyridoxine at Physiological pH

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Yasmin Roye ◽  
Uche Udeochu ◽  
Maraizu Ukaegbu ◽  
Jonathan Onuegbu
Keyword(s):  
Raman Band ◽  
Bathochromic Shift ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Shift ◽  
Sers Spectrum ◽  
Visible Absorption ◽  
Adenine Ring ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
The Individual

Spectroelectrochemical techniques were used to probe the interaction of adenine with pyridoxine at pH 7.0. Analysis of UV-visible absorption of the adenine-pyridoxine complex at 260 nm using the Lineweaver–Burk double reciprocal plot produced a linear graph indicating a 1 : 1 mode of interaction between the compounds and a binding constant of 29.1. Change in the background current and broadening of adenine and pyridoxine cyclic voltammetry (CV) oxidation peaks at 1.0 V and 0.8 V, respectively, compared to the CV of the individual compounds is indicative of an interaction. The Raman shift of the coupled –C(11)H2-OH bending and in-plane N(7)-H mode at 1235 cm−1 to 1215 cm−1 of pyridoxine and the shift to the lower wavenumber of the adenine –N(10)H2 rocking band from 942 to 906 cm−1 confirm that the adenine exocyclic amino group and its purine nitrogen atom N(7) interacts with pyridoxine O(12) via the formation of hydrogen bonds. Strong enhancement of surface-enhanced Raman spectroscopy (SERS) bands pertaining to adenine and the bathochromic shift of the normal Raman band due to the adenine ring breathing mode observed at 722 cm−1 in the spectrum of adenine, to 732 cm−1 in the SERS spectrum of aqueous adenine-pyridoxine indicates that the complex adsorbs onto the Ag nanoparticle surface with the adenine portion possessing a perpendicular orientation.

Gold/Palladium and Silver/Palladium Colloids as Novel Metallic Substrates for Surface-Enhanced Raman Scattering

2005 ◽  
Vol 59 (2) ◽  
pp. 194-199 ◽  
Author(s):  
Barbara Pergolese ◽  
Adriano Bigotto ◽  
Maurizio Muniz-Miranda ◽  
Giuseppe Sbrana
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Colloidal Nanoparticles ◽  
Visible Absorption ◽  
Transmission Electron ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Silver Palladium ◽  
Silver Colloidal Nanoparticles

New surface-enhanced Raman scattering (SERS) substrates, composed of gold or silver colloidal nanoparticles doped with palladium, were prepared. These novel colloids are stable and maintain a satisfactory SERS efficiency, even after long aging. The interest in doping the coinage metal nanoparticles with palladium is due to the well-known catalytic activity of this metal. Transmission electron microscopy (TEM) and ultraviolet–visible absorption spectroscopy were used to characterize the shape and size of the metal particles. It was found that these bimetallic colloidal nanoparticles have a core–shell structure, with gold or silver coated with palladium clusters.

Protein adsorption drastically reduces surface-enhanced Raman signal of dye molecules

2009 ◽  
Vol 41 (9) ◽  
pp. 952-957 ◽  
Author(s):  
Dongmao Zhang ◽  
Siyam M. Ansar ◽  
Karthikkeshwar Vangala ◽  
Dongping Jiang
Keyword(s):  
Protein Adsorption ◽  
Raman Signal ◽  
Dye Molecules ◽  
Surface Enhanced ◽  
Surface Enhanced Raman
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