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In this paper, we introduce novel findings that we have obtained through the several experimental techniques with high-voltage pulsed power in high-density fluids (such as subcritical water, supercritical carbon dioxide or supercritical argon). In laser ablation in supercritical carbon dioxide, we succeeded in the synthesis of gold nanoparticles from gold substrate. Next, we were able to produce hard amorphous carbon thin film from typical organic chemicals such as phenol and aniline. Furthermore, by using a novel technique ``electro-spinning in supercritical carbon dioxide'', we succeeded to prepare unique morphology fibers such as hollow or balloon-like structures in one step. [pulsed power, pulsed discharge, supercritical fluids, amorphous carbon, laser ablation, nanoparticles, electrospinning, nanofibers]

Preparation of Nano-Sized Materials with Pulsed Power Irradiation in Supercritical Fluids