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Intense terahertz pulses are used to investigate nonlinear carrier dynamics in Au thin films with different morphologies. From THz field-dependent transmission measurements, we found that the conductivity in percolated Au nanostructures increases with increasing the incident field strength. The measured complex dielectric dispersion was analyzed using the Drude-Smith model to discuss the dynamics...
Terahertz chemical microscope was carried out to visualize the distribution of the redox reaction of the immobilized-enzyme. The urease films with the spot size of 3, 2, 1 mm in diameter were immobilized on a SiO2/Si/Sapphire layered device and the laser-excited terahertz radiation from the Si layer was observed, which can be related to the chemical potential shift of the SiO2 surface. The redox reaction...
In this paper we present a simple but powerful one-step growth method of ultra-long vertically aligned multi-walled CNT (MWNT) array, and its possible applications. Our growth method requires no additional process for catalyst thin film (pre-deposition), and only requires iron chloride powder and acetylene gas. We also present the results of electrical properties of MWNT array, such as electrical...
In this paper, we use mica for clay and report on a finding of very large remanent polarization in the PVDF/mica nanocomposites prepared by melt crystallization and solvent casting.
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