For practice application of nanomaterial, it need solution of synthesis problems. These nanomaterial problems were solved by new concept fabrication system. Metal oxide used as ecometal source in new concept processing. Solid-liquid system will be high concentration, high yield and high throughput processing. Ultrasound and microwave reactor were enhanced chemical reaction and created novel chemical reaction. Realization of innovative nanomaterial fabrication were enabled joining environment, low cost and high throughput by combining these concepts. This commentary was explained nanomaterial problems and introduced the example of some metal nanoparticle related material processing by synergistic effects of solid-liquid system and ultrasound, microwave reactor, and promotion of industry-academia-government collaboration.
Laser light probing method is introduced in the ultrasonic measurement system to detect and identify the position of residual stress. Acryl sample having 1.5mm slit and compression or tension stress is used to demonstrate the usefulness of the method. The laser light via the APD sensor and vector signal analyzer（VSA）analyzed fundamental and second harmonic component including in the ultrasonic wave detected by the APD. Second harmonic component increases around the residual stress and rapid variation area of stress is revealed. Possibility of novel evaluation of the residual stress by the laser light probing method is also demonstrated.
The efficient use of lignocellulosic residue generated from bio-ethanol production is important for transition into a sustainable society. The proportion of lignin depend on plant species and hydrolysis reactivity of enzymatic saccharification treatment in bio-ethanol production. If poly（lactic）acid（PLA）green composites were prepared with lignocellulosic residue, they have merit as carbon-neutral materials. In this study, to investigate the effect of the residue surface and lignin fraction on the mechanical properties of the PLA composites, first, the effect of the hydrolysis reaction time of the lignocellulosic residue was analyzed. Field emission scanning electron microscopy analysis showed microspores on the residue surface, which increased with the hydrolysis reactivity. The PLA composites were prepared with injection molding, and their tensile strength increased with the saccharification treatment time, possibly because of physical anchoring due to the presence of microspores on residue.
Laser light probing method is introduced in the ultrasonic measurement system to detect and identify the properties of residual stress around small area in solid material. PMMA（Polymethyl methacrylate）sample introduced 1.0mm slit and compression or tension stress is used to demonstrate the usefulness of the method. The laser beam light via the avalanche photo diode （APD）and vector signal analyzer（VSA）analyzed the phase changes including in the ultrasonic wave affected by the residual stress in the PMMA sample. Ultrasonic phase varied around the residual stress and rapid variation area of ultrasonic phase changes are revealed. Possibility of an evaluation technique for the small area residual stress by the laser light probing is demonstrated.
Laser light probing method is introduced in the ultrasonic measurement system to find out the effects of residual stress on the phase of Rayleigh wave. Tempered glass having surface residual stress is used to examine the effects to the phase of Rayleigh wave. The reflected laser light from the surface of sample tempered glass is obtained by optical sensor（APD）via the two polarized plates. Vector signal analyzer（VSA）analyzed the phase of 5 MHz Rayleigh wave detected by the APD. The phase of Rayleigh wave on the tempered glass can be obtained from a phase slope. The phase of Rayleigh wave rapidly changes at the residual stress area. Change of polarity of stress which is corresponded to this area, is also revealed. Possibility of quality evaluation of such as a tempered glass by the laser light probing method is suggested.
Propagation of ultrasonic Lamb waves in a glass having tapered part was visualized by the strobe photoelastic system introducing sensitive tint method. The time transition of ultrasonic pressure of 1.447 MHz burst sine wave propagation were observed. To enhance the contrast of ultrasonic Lamb wave, subtracted image with C-MOS camera was adopted. As the results, polarities of ultrasound pressure were clearly visualized. As the Lamb wave propagate, higher mode of S2 Lamb waves in the thick part are appeared and they are gradually varied to S0 mode in the thin part via the tapered part of S1 mode. Moreover, FEM analysis and performed to verify the experimented results that these results are correct.