Atomistic modeling and rational design of optothermal tweezers for targeted applications

作     者：Hongru Ding Pavana Siddhartha Kollipara Linhan Lin Yuebing Zheng Hongru Ding;Pavana Siddhartha Kollipara;Linhan Lin;Yuebing Zheng

作者机构：Walker Department of Mechanical EngineeringThe University of Texas at AustinAustinTX 78712USA State Key Laboratory of Precision Measurement Technology and InstrumentsDepartment of Precision InstrumentTsinghua UniversityBeijing 100084China Materials Science&Engineering Program and Texas Materials InstituteThe University of Texas at AustinAustinTX 78712USA 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2021年第14卷第1期

页      面：295-303页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the National Science Foundation(No.NSF-CMMI-1761743) the National Aeronautics and Space Administration Early Career Faculty Award(No.80NSSC17K0520) the National Institute of General Medical Sciences of the National Institutes of Health(No.DP2GM128446) L.H.L.acknowledges financial support from the National Natural Science Foundation of China(No.62075111) the State Key Laboratory of Precision Measurement Technology and Instruments.The authors are grateful to Prof.Brian A.Korgel and Dr.Taizhi Jiang for providing Si particles.They also thank Yaoran Liu,Jingang Li,Kan Yao and Zhihan Chen for useful discussions 

主　　题：optothermal tweezers optical tweezers optical manipulation thermophoresis molecular dynamics simulation 

摘      要：Optical manipulation of micro/nanoscale objects is of importance in life sciences,colloidal science,and *** tweezers exhibit superior manipulation capability at low optical ***,our implicit understanding of the working mechanism has limited the further applications and innovations of optothermal ***,we present an atomistic view of opto-thermo-electro-mechanic coupling in optothermal tweezers,which enables us to rationally design the tweezers for optimum performance in targeted ***,we have revealed that the non-uniform temperature distribution induces water polarization and charge separation,which creates the thermoelectric field dominating the optothermal *** further design experiments to systematically verify our atomistic *** by our new model,we develop new types of optothermal tweezers of high performance using low-concentrated ***,we demonstrate the use of new tweezers in opto-thermophoretic separation of colloidal particles of the same size based on the difference in their surface charge,which has been challenging for conventional optical *** the atomistic understanding that enables the performance optimization and function expansion,optothermal tweezers will further their impacts.