scholarly journals Nonlinear optical response of a gold surface in the visible range: A study by two-color sum-frequency generation spectroscopy. II. Model for metal nonlinear susceptibility

2018 ◽  
Vol 149 (3) ◽  
pp. 034701 ◽  
Author(s):  
B. Busson ◽  
L. Dalstein
Keyword(s):  
Nonlinear Optical ◽  
Gold Surface ◽  
Optical Response ◽  
Sum Frequency Generation ◽  
Nonlinear Optical Response ◽  
Nonlinear Susceptibility ◽  
Visible Range ◽  
Sum Frequency ◽  
Sum Frequency Generation Spectroscopy ◽  
Frequency Generation

scholarly journals The Effect of Bacterial Adhesion on Grafted Chains Revealed by the Non-Invasive Sum Frequency Generation Spectroscopy

2012 ◽  
Vol 27 ◽  
pp. 571-579 ◽  
Author(s):  
Emilie Bulard ◽  
Marie-Pierre Fontaine-Aupart ◽  
Henri Dubost ◽  
Wanquan Zheng ◽  
Jean-Marie Herry ◽  
...  
Keyword(s):  
Biofilm Formation ◽  
Gold Surface ◽  
Sum Frequency Generation ◽  
Microbial Consortia ◽  
Self Assembled Monolayer ◽  
Sum Frequency ◽  
Non Invasive ◽  
Planktonic Bacteria ◽  
Sum Frequency Generation Spectroscopy ◽  
Frequency Generation

In biomedical and food industry, surface colonization by bacteria is harmful: it leads to biofilm formation, a microbial consortia more resistant to antibiotics than planktonic bacteria. In order to design materials able to limit the biofilm formation, the effect of bacteria on materials has to be well characterized. In this work, a well-defined surface composed of a self-assembled monolayer (SAM) of octadecanethiol (ODT) onto a gold surface is probedin situ. The SAM conformation is obtained using the femtosecond vibrational sum frequency generation (SFG) spectroscopy. This technique provides selectively the molecular vibrational signature of the interface. The behaviour of the ODT SAM is studied in different environments: in air, in water, and upon exposure to hydrophilic or hydrophobicLactococcus lactisbacteria. Modelling the experimental SFG spectra reveals a measurable change of the SAM conformation which depends on the environment, especially on the hydrophilic-hydrophobic character.

scholarly journals Sum frequency generation spectroscopy in heterogeneous model catalysis: a minireview of CO-related processes

2021 ◽  
Author(s):  
Xia Li ◽  
Günther Rupprechter
Keyword(s):  
Surface Science ◽  
Science Studies ◽  
Ambient Pressure ◽  
Sum Frequency Generation ◽  
Heterogeneous Model ◽  
Model Catalysis ◽  
Sum Frequency ◽  
Pressure Surface ◽  
Sum Frequency Generation Spectroscopy ◽  
Frequency Generation

Sum frequency generation (SFG) vibrational spectroscopy is applied to ambient pressure surface science studies of adsorption and catalytic reactions at solid/gas interfaces.

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