文献类型：期刊文献

英文题名：Research on the dissipation effect of photoacoustic actuation and patterning in liquid

作者：Li, Jin[1];Zheng, Dongmei[1];Li, Jiasheng[2];Su, Yu[1];Li, Fengxu[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai, Peoples R China;[2]China Acad Engn Phys, Inst Mech Mfg Technol, Mianyang, Peoples R China

年份：2026

卷号：65

期号：5

起止页码：056105

外文期刊名：OPTICAL ENGINEERING

收录：;EI(收录号：20262220824489);WOS:【SCI-EXPANDED(收录号:WOS:001779906700006)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 52575060 and 12327807) and the National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant No. 2026ZD0719001).

语种：英文

外文关键词：noncontact manipulation; photoacoustic actuation; dissipation effect; temperature gradients; patterning

摘要：Noncontact manipulation of matter in liquid has become an effective approach with great potential in fields such as materials processing, biochemistry, and pharmaceuticals. We present a programmable photoacoustic actuation and patterning method that utilizes the dissipation effect to enable the movement and arrangement of particles in water. The dissipation effect is an energy conversion mechanism that facilitates the ordered transfer of energy from optical to thermal to mechanical forms. In addition, the precise regulation of this energy conversion process can be realized by tuning laser power, pulse width, and point rate, thereby achieving the controllable actuation and patterning of microparticles. Moreover, we found that the dissipation effect of energy transfer in liquids is more pronounced than in air and can produce a stronger moving force, thereby overcoming the low efficiency and microscale limitations imposed by material ablation thresholds in traditional photoacoustic actuation. By regulating laser parameters, we achieved moving and patterning micrometer-sized particles with a maximum single-stroke displacement exceeding 3 mm. Furthermore, we successfully achieved patterning of polystyrene microsphere particles with a diameter of similar to 500 mu m. We not only provide a reference for selecting reasonable parameters for practical applications but also pave the way for applications in microfluidics, microassembly, and cell manipulation.