Electric Field Reversal of Na2SO4, (NH4)2SO4, and Na2CO3 Relative to CaCl2 and NaCl at the Air/Aqueous Interface Revealed by Heterodyne Detected Phase-Sensitive Sum Frequency

2011 ◽  
Vol 2 (20) ◽  
pp. 2515-2520 ◽  
Author(s):  
Wei Hua ◽  
Aaron M. Jubb ◽  
Heather C. Allen
Keyword(s):  
Electric Field ◽  
Field Reversal ◽  
Sum Frequency ◽  
Phase Sensitive

scholarly journals Mapping Molecular Orientation with Phase Sensitive Vibrationally Resonant Sum-Frequency Generation Microscopy

2013 ◽  
Vol 117 (20) ◽  
pp. 6149-6156 ◽  
Author(s):  
Yang Han ◽  
Varun Raghunathan ◽  
Ran-ran Feng ◽  
Hiroaki Maekawa ◽  
Chao-Yu Chung ◽  
...  
Keyword(s):  
Molecular Orientation ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
Phase Sensitive ◽  
Frequency Generation

scholarly journals High-resolution phase-sensitive sum frequency generation spectroscopy by time-domain ptychography

2020 ◽  
Vol 45 (21) ◽  
pp. 6082
Author(s):  
Tobias Schweizer ◽  
Bruno G. Nicolau ◽  
Priscila Cavassin ◽  
Thomas Feurer ◽  
Natalie Banerji ◽  
...  
Keyword(s):  
High Resolution ◽  
Time Domain ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
Sum Frequency Generation Spectroscopy ◽  
Phase Sensitive ◽  
Frequency Generation

scholarly journals On the Emergence of Electric Fields at the Water-C12E6 Surfactant Interface

2021 ◽  
Author(s):  
Rahul Gera ◽  
Huib Bakker ◽  
Ricardo Franklin ◽  
Uriel N. Morzan ◽  
Gabriele Falciani ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Md Simulations ◽  
Mutual Orientation ◽  
Kelvin Probe ◽  
Sum Frequency ◽  
Hydrogen Bond Strength ◽  
Air Interface ◽  
Harvesting Systems ◽  
Probe Measurements

We study the properties of the interface of water and the surfactant Hexaethylene Glycol Monododecyl Ether (C12E6)<br>with a combination of Heterodyne-Detected Vibrational Sum Frequency Generation (HD-VSFG), Kelvin-Probe measurements, and Molecular Dynamics (MD) simulations. We observe that the addition of C12E6 close to the critical micelle concentration (CMC), induces a drastic hydrogen bond strength enhancement of the water molecules close to the interface, as well as a flip in their net orientation. The mutual orientation of the water and C12E6 molecules, leads to the emergence of a broad (~ 3 nm) interface with a large electric field of ~ 1V/nm, as evidenced by the Kelvin-Probe measurements and MD simulations. Our findings may open the door for the design of novel electric-field tuned catalytic and light harvesting systems anchored at water-surfactant air interface. <br>

Spinal neurite reabsorption and regrowth in vitro depend on the polarity of an applied electric field

Development ◽  
1987 ◽  
Vol 100 (1) ◽  
pp. 31-41
Author(s):  
C.D. McCaig
Keyword(s):  
Electric Field ◽  
Neural Tube ◽  
Applied Field ◽  
Growth Cones ◽  
Individual Growth ◽  
Electrical Field ◽  
Field Reversal ◽  
Specific Change ◽  
Applied Electrical Field

Retraction and regrowth of frog neural tube neurites have been studied in vitro in control cultures and in the presence of a small, continuously applied electrical field. In control cultures, some degree of retraction was seen in 39% of neurites while 7% were reabsorbed completely. Reabsorption of anodal-facing neurites was at least twice as common, with 67% showing some retraction and 17% almost totally reabsorbed. Cathodal-facing neurites were spared from retraction. Following extreme reabsorption of anodal-facing neurites, reversal of the electric field promoted regeneration in 47% (9/19) of cases studied. growth cone morphology also was determined by the polarity of the applied field. Anodal-facing growth cones had fewer filopodia than cathodal-facing growth cones sharing the same cell body. Field reversal induced a polarity-specific change in filopodia number on individual growth cones: a shift from anodal to cathodal increased filopodia numbers and vice versa. Some possible mechanisms involved and the significance of these results are discussed.

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