Abstracts

Chemicals, plastics and rubber industries

Search abstracts:

Angle-dependent terahertz time-domain spectroscopy of amino acid single crystals

Article Abstract:

A report on the measurement of absorption spectras using angle-dependent terahertz (THz) time-domain spectroscopy for amino acid single crystals of L-cysteine and L-histidine is presented. Linearly polarized THz radiation enables to observe angle-dependent far-infrared absorption spectra of amino aid single crystals and determine the direction of the oscillating dipole of the molecules in the 20-100 [cm.sup.-1] range.

Observations, Spectra, Amino acids, Terahertz radiation

---

Cooperative atomic displacements and melting at the limit of superheating

Article Abstract:

A study is conducted to show how the melting of superheated crystals originates from the localization of thermal disorder in excited regions of the crystalline structure. It is found that characterized by high mobility, defective atoms undergo a cooperative dynamics that can result in net atom displacements between equilibrium lattice sites.

Analysis, Lattice dynamics

---

Cooperative dynamics and self-diffusion in superheated crystals

Article Abstract:

Molecular dynamics dsimulations were used to study atomistic scale dynamics of superheated crystals under different temperature and pressure conditions. The occurrence of homogenous melting was related to the generation of structural defects characterized by the presence of pairs of particles having defective coordination.

Molecular dynamics, Molecular crystals, Chemical properties

Similar abstracts:

• Abstracts: Grazing-incidence x-ray diffraction study of octadecanoic acid monolayers. Coherent vibrational quantum beats as a probe of Langmuir-Blodgett monolayers
• Abstracts: Intermolecular potentials of mean force of amino acid side chain interactions in aqueous medium. Liquid-structure forces and electrostatic modulation of biomolecular interactions in solution
• Abstracts: Thermochromatism and structural evolution of metastable polydiacetylenic crystals. How good is Langevin
• Abstracts: Photoswitchable antigen-antibody interactions studied by impedance spectroscopy. Impedance spectroscopy of water solutions: The role of ions at the liquid-electrode interface
• Abstracts: Effect of the internal field on the IR absorption spectra of small particles in the case of 3D, 2D and 1D size confinement

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.