液体中脉冲激光熔化瞬间粒子加热过程中热致纳米气泡的行为
Behavior of Thermally Induced Nanobubbles during Instantaneous Particle Heating by Pulsed Laser Melting in Liquid.
作者信息
Tabayashi Yasunori, Sakaki Shota, Koshizaki Naoto, Yamauchi Yuji, Ishikawa Yoshie
机构信息
Graduate School of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
出版信息
Langmuir. 2021 Jun 15;37(23):7167-7175. doi: 10.1021/acs.langmuir.1c00736. Epub 2021 Jun 2.
Pulsed laser melting in liquid (PLML) is a technique to produce submicrometer spherical particles (SMPs). In this process, raw particles dispersed in liquid are selectively heated, and thermally induced nanobubbles (TINBs) at the particle surface are generated and act as a thermal barrier to enhance the temperature increase during heating. However, monitoring TINBs is difficult since PLML is a low-temperature, nonplasma process. Simple transmittance measurements of monodisperse Au SMP (250 nm) colloidal solutions on a transient time scale were used to monitor the temporal dependence of the TINB thickness and the pressure within the bubble. By applying this technique for ZnO and Sn SMP formation, TINBs in the PLML process are important in promoting the formation of large particles via particle merging during laser heating.
脉冲激光液体中熔化（PLML）是一种生产亚微米级球形颗粒（SMP）的技术。在此过程中，分散在液体中的原始颗粒被选择性加热，颗粒表面产生热诱导纳米气泡（TINB），并作为热障增强加热过程中的温度升高。然而，由于PLML是一种低温、非等离子体过程，监测TINB很困难。利用在瞬态时间尺度上对单分散金SMP（250nm）胶体溶液进行简单的透光率测量，来监测TINB厚度和气泡内压力的时间依赖性。通过将该技术应用于氧化锌和锡SMP的形成过程，PLML过程中的TINB对于在激光加热期间通过颗粒合并促进大颗粒的形成很重要。
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