Analysis of the intermolecular interaction of nanocomposites by THz spectroscopy

Abstract

Transmission and reflection measurements on polyamide nanocomposite films were performed in the THz frequency region, and the dielectric function was calculated using the Debye model to interpret the data. The relaxation time from the signal of orientation polarization due to the permanent dipole moments exhibits intermolecular interaction. In nanocomposites, the extreme increase of the interaction from polymer clay was first observed by THz spectroscopy. The essential interaction was thought to occur between the amide functional (−NH) group in polyamide-6 and the surface of the clay by considering the correlation with the results of infrared spectroscopy.

Dielectric properties of woven fabric glass fiber reinforced polymer-matrix composites in the THz frequency range

“…The increasing trend with increasing frequency of the e 00 (x) for both the composites is due to the dielectric constant for E-glass fabric (boson peak) and matrix materials (molecular interaction). Similar trends and discussions were observed for silica glass [7] and for polymer [3,9].…”

Nonlinear spectroscopy of exciton-polaritons in a GaAs-based microcavity

“…While THz spectroscopy is an appealing tool for a wide range of applications such as the investigation of biomolecules [10], material evaluation [11], and for security issues, e.g., tracing of illegal drugs [12] (a comprehensive overview of applications of THz spectroscopy can be found in Ref. [13]), the number of available laser sources in this spectral region is rather limited.…”

Layer Caused an Anisotropic Terahertz Response of a 3D-printed Simulative Shale Core

“…18 The dielectric properties of montmorillonite clay, 19 micaceous clay, 20 kaolinite, halloysite, 21 and clay-based polyamide nanocomposite films were measured at the THz region. 22 Meanwhile, the THz technique has also been employed to study the anisotropic response of materials. Various crystals and alternating structures have been studied to exhibit THz birefringence.…”