다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Hydrogen production by laser irradiation of metals in water under an ultrasonic field: A novel approach

Laser-induced hydrogen generation from graphite and coal

Continuous oscillation of a compact solar-pumped Cr, Nd-doped YAG ceramic rod laser for more than 6.5 h tracking the sun

In this report, copper iron sulfide nanoparticles with various composition were synthesized by a thermolysis based wet chemical method. These inherently sustainable nanoparticles were then fully characterized in terms of composition, structure, and morphology, as well as for suitability as a thermoelectric material. The merits of the material preparation include a straightforward bulk material formation where particles do not require any specialized treatment, such as spark plasma sintering or thermal heating. The Seebeck coefficient of the materials reveals P-type conductivity with a maximum value of 203 µV/K. The results give insight into how to design and create a new class of sustainable nanoparticle material for thermoelectric applications.

/pdf/chalcopyrite-nanoparticles-as-a-sustainable-thermoelectric-1sqwa80otj.pdf

Chalcopyrite Nanoparticles as a Sustainable Thermoelectric Material.

A recyclable energy cycle using a pulsed laser and base-metal nanoparticles is proposed In this energy cycle, iron nanoparticles reduced from iron oxides by laser ablation in liquid are used for hydrogen generation The laser energy can be stored in the base-metal nanoparticles as the difference between the chemical energies of iron oxide and iron According to the results of an experiment on hydrogen production using the reduced iron nanoparticles, the reaction efficiency of the hydrogen generation at a temperature of 673 K was more than 94% for the ideal amount of generated hydrogen

https://downloads.hindawi.com/archive/2013/827681.pdf

Hydrogen Production Using Reduced-Iron Nanoparticles by Laser Ablation in Liquids

Development of Solar‐Pumped Lasers and Its Application

Metal nanoparticles have become attractive as original materials for nano-inks and nano-pastes, which are used in printed electronics. Synthesizing various metal nanoparticles has been researched. We investigated the possibility of reducing metal oxide in a metal by using high-voltage pulses in this paper. This method should save electrical consumption power compared with conventional methods that use high-temperature and high-pressure plasma such as arc discharge. Reduced Al nanoparticles were obtained by applying high-voltage pulses to solutions. By analyzing elements and the composition of reduced Al nanoparticles by STEM and EDX, a large amount of reduced Al nanoparticles with diameters of a few 100 nm and thin oxide film of around 1 nm on metal surfaces were produced in experiments for reducing Al oxide. It was found from hydrogen generation using reduced Al nanoparticles by applying high-voltage pulses to solutions to evaluate reduction rate that a high reduction efficiency of 97% was obtained at maximum. We concluded that using high-voltage pulses for reduction can be suitably applied to printed electronics because the oxide film on reduced Al nanoparticles is thin. Also, because this method is similar to laser ablation in liquids using pulse lasers, the similarities were discussed in this paper.

Seiji Taniguchi

Papers

Hydrogen Production Using Reduced-Iron Nanoparticles by Laser Ablation in Liquids

Development of Solar‐Pumped Lasers and Its Application

Production of Reduced Al Nanoparticles from Al Oxide by Applying High Voltage Pulses to Solutions

Development on Solar-pumped Lasers and its Application