Up to which temperature ultrasound can heat the particle?

Abstract

Crystallographic property such as crystallite size has been used for evaluation of the temperature up to which high intensity ultrasound can heat metal particles depending on physical properties of sonication medium and particle concentration. We used >100 μm metal particles as an in situ indicator for ultrasonically induced temperature in the particle interior. Based on powder X-ray diffraction monitoring of Al3Ni2 crystallite sizes after ultrasound treatment the average minimum temperature T particle(min) of sonicated particles in various sonication media was estimated. Additionally, it was found that crystallite size in ultrasonically treated metal particle depends on the frequency of interparticle collision. Through the adjustment of particle concentration, it is possible to either accelerate the atomic diffusion or force the melting and recrystallization processes. Overall, the energy released from collapsing cavitation bubble can be controllably transferred to the sonication matter through the appropriate choice of sonication medium and the adjustment of particle concentration.

Enhancement of Neurite Outgrowth by Warming Biomaterial Ultrasound Treatment

“…The effectiveness of ultrasonicinduced heating could be significantly improved by a sonosensitizer, such as magnetic nanoparticles embedded in warming biomaterial [14,19]. Ultrasonic treated particles induced the crystal lattice change had been reported [20], but we still cannot confirm the heating of warming biomaterials treated with ultrasound due to this cause. However, we still suggest some possible reasons for ultrasound-induced heating.…”

Cell Guidance on Nanostructured Metal Based Surfaces

“…The combination of physical and chemical effects allows a straight forward one‐step modification of metal surfaces. The ultrasound‐driven modification of metals in aqueous solutions results in the modification of outer surface properties such as roughness, surface area, and wettability, and inner properties such as crystallinity, amorphization, and phase structuring …”

Ultrasound-driven titanium modification with formation of titania based nanofoam surfaces

“…After that, the surface is modified again, and the roughness increases. The second explanation is based on a more complex effect, an interplay between the number of bubble collapse events and temperature effect [34] of the HIUS. The more bubble collapses takes place, the higher the roughness increases, however due to the corresponding temperature increase, the surface smoothens again.…”