Probing the interface of microscopic clay particles in aqueous solution by second harmonic generation
Article Abstract:
Second harmonic generation (SHG) is used for the first time to investigate the surfaces of clay particles. Results revealed an SHG signal from an aqueous suspension of clay particles of Na-montmotrillonite measuring O.5 um diameter and 0.01 micron thickness. The signal was found to originate from the polarization of water molecules by surface charges at the edge region of the particles. A strong SHG signal coming from the 4-(2-pyridylazo)resorcinol molecules adsorbed onto the edge surfaces of the particles were also obtained.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Anisotropic interfacial free energies of the hard-sphere crystal-melt interfaces
Article Abstract:
A method to define the interfacial particles for determining the crystal-melt interface position, which is the key step for the crystal-melt interfacial free energy calculations using capillary wave approach, is presented. The free energies gamma of the fcc crystal-melt interfaces for the hard-sphere system is calculated as a function of crystal orientations and the height fluctuations of the interface are examined using Monte Carlo simulations.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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Rotational dynamics of anisotropic microscopic particles studied by second harmonic generation
Article Abstract:
The application of second harmonic generation (SHG) to study the rotational dynamics of anistotropic microparticles is reported. Fluctuations in the SH signal observed upon irradiating the samples with the fundamental light are attributed to the rotational motion of the particles.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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