Studies of Molecular Properties at the Surface of a Liquid Jet by Second Harmonic Generation
نویسندگان
چکیده
We report the use of second harmonic generation (SHG) to study kinetics of adsorption of p-nitrophenol at the air/water interface of a flowing jet. Measurements of the SH signal strength and the polarization of the SH light at various distances (times) along the jet axis yield information about the development of the population density and orientation of nitrophenol at the air/ water interface. The kinetics of adsorption are consistent with the Langmuir theory. The free energy of adsorption obtained from the jet experiments was the same as that obtained from static experiments. The orientation of nitrophenol at the jet air/solution interface was the same as for the static (equilibrium) interface; orientational equilibrium is rapidly achieved.
منابع مشابه
Second Harmonic Generation Diagnostic of Layer by Layer Deposition from Disperse Red 1–Functionalized Maleic Anhydride Copolymer
Layer-by-layer (LBL) electrostatic assembly of poly-electrolytes is proving to be an increasingly rich and versatile technique for the formation of multilayered thin films with a wide range of electrical, magnetic, and optical properties. In the present work we synthesized a new nonlinear optical (NLO) maleic acid copolymer containing Disperse Red 1 moieties, built-up multilayer assemblies by a...
متن کاملTime Frequency Analysis of Higher Harmonic Generation in a Three Color Laser Pulse
high harmonic generation is a useful tool for the generation of short, intense attosecond pulses. In order to simulate high harmonic generation, we performed a numerical solution to the time dependent Schrödinger equation. by considering dipole approximation, we predicted generation of a 53 attosecond pulse. In order to see the time and frequency of emission of attosecond pulse, we exploit...
متن کاملStudies on the Optical, Mechanical and Dielectric Properties of Nonlinear Optical Single Crystal Bis (Guanidinium) Hydrogen Phosphate Monohydrate (G2HP)
Single crystals of nonlinear optical material bis (guanidinium) hydrogen phosphate monohydrate (G2HP) belonging to non centrosymmetric space group P 21c were successfully grown by the slow evaporation method. Optical transmittance and second harmonic generation of the grown crystals have been studied by UV-vis-NIR spectrum and Kurtz powder technique respectively. The transmittance of G2HP cryst...
متن کاملA review of simultaneous ultrasound-assisted coal flotation
Ultrasound can be used both simultaneously or as a pretreatment technique for flotation to produce higher combustible recoveries, higher heat values, and lower ash data from raw hard coals. The recent research works have indicated that modifying coal surfaces, especially physical surface cleaning with the help of the cavitation process created by power ultrasound at certain frequency and time i...
متن کاملStudying the Effect of Submergence Depth on Scour Pattern of Hydraulic Jet Downstream
This research aims to study jet downstream scour model under the influence of changes of water level. It also studies and analyzes different parameters and components of diffusion of submerged jet flow in an acceptor fluid and scour hole dimensions. To achieve the objectives, a physical model was made in proportion to the research title. With the Froude number increasing in a nozzle discharge, ...
متن کامل