Determining the Surface Potential of Charged Aqueous Interfaces Using Nonlinear Optical Methods

2021 ◽  
Author(s):  
Canyu Cai ◽  
Md. Shafiul Azam ◽  
Dennis K. Hore
Keyword(s):  
Surface Potential ◽  
Nonlinear Optical ◽  
Optical Methods ◽  
Aqueous Interfaces

l-Cysteine films on Ag(111) investigated by electrochemical and nonlinear optical methods

2007 ◽  
Vol 342 (1-3) ◽  
pp. 236-244 ◽  
Author(s):  
E. Santos ◽  
L.B. Avalle ◽  
R. Scurtu ◽  
H. Jones
Keyword(s):  
Nonlinear Optical ◽  
Optical Methods

Melanin diagnostics with nonlinear optics: a mini-review

2022 ◽  
Vol 52 (1) ◽  
pp. 28-35
Author(s):  
E A Shirshin ◽  
B P Yakimov ◽  
G S Budylin ◽  
K E Buyankin ◽  
A G Armaganov ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Nonlinear Optical ◽  
Photophysical Properties ◽  
Multiphoton Microscopy ◽  
Optical Methods ◽  
Fluorescence Lifetime Imaging ◽  
Third Harmonic ◽  
Biomedical Diagnostics ◽  
Probe Spectroscopy ◽  
Anti Stokes

Abstract Optical methods are widely used to perform fundamental studies of living systems and solve problems of biomedical diagnostics. Along with the classical spectroscopy, methods of nonlinear optics (e.g., multiphoton microscopy) are also applied in biophotonics. The potential of nonlinear optical methods for visualisation and analysis of the properties of endogenous chromophore molecules are considered in this minireview. Melanin - a pigment with specific spectral features of photophysical properties in the visible and near-IR ranges - is taken as an example. It is discussed what information about its localisation in tissues and structural organisation can be obtained by nonlinear optical methods: multiphoton fluorescence microscopy (including fluorescence lifetime imaging), third harmonic generation, pump - probe spectroscopy, and coherent anti- Stokes Raman spectroscopy.

scholarly journals Polarimetric Measurements of Surface Chirality Based on Linear and Nonlinear Light Scattering

2021 ◽  
Vol 8 ◽  
Author(s):  
Ankur Gogoi ◽  
Surajit Konwer ◽  
Guan-Yu Zhuo
Keyword(s):  
Conformational Changes ◽  
Nonlinear Optical ◽  
Building Blocks ◽  
Mirror Image ◽  
Optical Methods ◽  
Label Free ◽  
Chiral Drugs ◽  
Critical Issues ◽  
Linear And Nonlinear ◽  
Nonlinear Light Scattering

A molecule, molecular aggregate, or protein that cannot be superimposed on its mirror image presents chirality. Most living systems are organized by chiral building blocks, such as amino acids, peptides, and carbohydrates, and any change in their molecular structure (i.e., handedness or helicity) alters the biochemical and pharmacological functions of the molecules, many of which take place at surfaces. Therefore, studying surface chirogenesis at the nanoscale is fundamentally important and derives various applications. For example, since proteins contain highly ordered secondary structures, the intrinsic chirality can be served as a signature to measure the dynamics of protein adsorption and protein conformational changes at biological surfaces. Furthermore, a better understanding of chiral recognition and separation at bio-nanointerfaces is helpful to standardize chiral drugs and monitor the synthesis of adsorbents with high precision. Thus, exploring the changes in surface chirality with polarized excitations would provide structural and biochemical information of the adsorbed molecules, which has led to the development of label-free and noninvasive measurement tools based on linear and nonlinear optical effects. In this review, the principles and selected applications of linear and nonlinear optical methods for quantifying surface chirality are introduced and compared, aiming to conceptualize new ideas to address critical issues in surface biochemistry.

The formation of a light field with suppressed photon fluctuations by nonlinear optical methods

JETP Letters ◽  
2002 ◽  
Vol 76 (5) ◽  
pp. 275-278 ◽  
Author(s):  
A. V. Nikandrov ◽  
A. S. Chirkin
Keyword(s):  
Nonlinear Optical ◽  
Light Field ◽  
Optical Methods
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