Mid-infrared second-order susceptibility of α-quartz and its application to visible-infrared surface sum-frequency spectroscopy

2004 ◽  
Vol 121 (24) ◽  
pp. 12589 ◽  
Author(s):  
Dennis K. Hore ◽  
Mathew Y. Hamamoto ◽  
Geraldine L. Richmond
Keyword(s):  
Second Order ◽  
Mid Infrared ◽  
Sum Frequency ◽  
Sum Frequency Spectroscopy ◽  
Order Susceptibility

Bulk Contributions Modulate the Sum-Frequency Generation Spectra of Interfacial Water on Model Sea-Spray Aerosols

2018 ◽  
Author(s):  
Sandeep K. Reddy ◽  
Raphael Thiraux ◽  
Bethany A. Wellen Rudd ◽  
Lu Lin ◽  
Tehseen Adel ◽  
...  
Keyword(s):  
Single Layer ◽  
Sum Frequency Generation ◽  
Second Order ◽  
Interfacial Structure ◽  
Sea Spray ◽  
Third Order ◽  
Systematic Analysis ◽  
Sum Frequency ◽  
Structure Of Water ◽  
Frequency Generation

Vibrational sum-frequency generation (vSFG) spectroscopy is used to determine the molecular structure of water at the interface of palmitic acid monolayers. Both measured and calculated spectra display speci c features due to third-order contributions to the vSFG response which are associated with nite interfacial electric potentials. We demonstrate that theoretical modeling enables to separate the third-order contributions, thus allowing for a systematic analysis of the strictly surface-sensitive, second-order component of the vSFG response. This study provides fundamental, molecular-level insights into the interfacial structure of water in a neutral surfactant system with relevance to single layer bio-membranes and environmentally relevant sea-spray aerosols. These results emphasize the key role that computer simulations can play in interpreting vSFG spectra and revealing microscopic details of water at complex interfaces, which can be difficult to extract from experiments due to the mixing of second-order, surface-sensitive and third-order, bulk-dependent contributions to the vSFG response.

Sum frequency spectroscopy of the hydrophobic nanodroplet/water interface: Absence of hydroxyl ion and dangling OH bond signatures

2014 ◽  
Vol 615 ◽  
pp. 124-131 ◽  
Author(s):  
Jean-Sebastién Samson ◽  
Rüdiger Scheu ◽  
Nikolay Smolentsev ◽  
Steven W. Rick ◽  
Sylvie Roke
Keyword(s):  
Water Interface ◽  
Sum Frequency ◽  
Hydroxyl Ion ◽  
Sum Frequency Spectroscopy

Sum-Frequency Diffraction Loads on Tension-Leg Platforms in Bidirectional Waves

1997 ◽  
Vol 119 (1) ◽  
pp. 14-19
Author(s):  
J. H. Vazquez ◽  
A. N. Williams
Keyword(s):  
Numerical Technique ◽  
Diffraction Theory ◽  
Potential Method ◽  
Second Order ◽  
Surface Integral ◽  
Hydrodynamic Loads ◽  
Infinite Depth ◽  
Sum Frequency ◽  
Wave Directionality ◽  
Green Function Approach

Second-order diffraction theory is utilized to compute the sum-frequency diffraction loads on a deepwater tension-leg platform (TLP) in bidirectional waves. The linear diffraction solution is obtained utilizing a Green function approach using higher-order boundary elements. The second-order hydrodynamic loads explicitly due to the second-order potential are computed using the indirect, assisting radiation potential method. An efficient numerical technique is presented to treat the free-surface integral which appears in the second-order load formulation. Numerical results are presented for a stationary ISSC TLP in water of infinite depth. It is found that wave directionality may have a significant influence on the second-order hydrodynamic loads on a TLP and that the assumption of unidirectional waves does not always lead to conservative estimates of the sum-frequency loading.

scholarly journals Discrimination of collagen in normal and pathological skin dermis through second-order susceptibility microscopy

2009 ◽  
Vol 17 (13) ◽  
pp. 11161 ◽  
Author(s):  
Ping-Jung Su ◽  
Wei-Liang Chen ◽  
Jin-Bon Hong ◽  
Tsung-Hsien Li ◽  
Ruei-Jr Wu ◽  
...  
Keyword(s):  
Second Order ◽  
Order Susceptibility
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