Particle trapping and hopping in an optofluidic fishnet

Particle jumping between optical potentials has attracted much attention owing to its extensive involvement in many physical and biological experiments. In some circumstances, particle jumping indicates escaping from the optical trap, which is an issue people are trying to avoid. Nevertheless, parti...

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Main Authors: Shi, Yuzhi, Sha, Xiong, Zhang, Yi, Chin, Lip Ket, Wu, Jiuhui, Chen, Tianning, Liu, Ai Qun
Other Authors: Dholakia, Kishan
Format: Conference or Workshop Item
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/106342
http://hdl.handle.net/10220/49604
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1063422023-03-04T17:07:54Z Particle trapping and hopping in an optofluidic fishnet Shi, Yuzhi Sha, Xiong Zhang, Yi Chin, Lip Ket Wu, Jiuhui Chen, Tianning Liu, Ai Qun Dholakia, Kishan Spalding, Gabriel C. School of Electrical and Electronic Engineering School of Mechanical and Aerospace Engineering Optical Trapping and Optical Micromanipulation XIV Particle Jumping Optical Manipulation Engineering::Mechanical engineering Particle jumping between optical potentials has attracted much attention owing to its extensive involvement in many physical and biological experiments. In some circumstances, particle jumping indicates escaping from the optical trap, which is an issue people are trying to avoid. Nevertheless, particle jumping can facilitate the individual trap in each laser spot in the optical lattice and enable sorting and delivery of nanoparticles. Particle hopping has not been seen in fluid because Fluidic drag force dramatically reduce the dwell time of particle or break the potential well. Here, we observe particle hopping in the microchannel by three reasons, e.g., particle collision or aggregation, light disturbing by pretrapped particle and fake trapping position. We show that commonly ignored particle influence to the light could create a new isolated trapping position, where particle hops to the adjacent potential well. The hopping happens in an optofluidic fishnet which is comprised of discrete hotspots enabling 2D patterning of particles in the flow stream for the first time. We also achieve a 2D patterning of cryptosporidium in the microchannel. Our observed particle hopping in the flow stream completes the family of particle kinetics in potential wells and inspires new interests in the particle disturbed optical trapping. The 2D patterning of particles benefits the parallel study of biological samples in the flow stream and have potential on cell sorting and drug delivery. NRF (Natl Research Foundation, S’pore) Published version 2019-08-13T04:51:58Z 2019-12-06T22:09:27Z 2019-08-13T04:51:58Z 2019-12-06T22:09:27Z 2017 Conference Paper Shi, Y. Z., Sha, X., Zhang, Y., Chin, L. K., Wu, J., Chen, T. N., & Liu, A. Q. (2017). Particle trapping and hopping in an optofluidic fishnet. Proceedings of SPIE - Optical Trapping and Optical Micromanipulation XIV 2017, 10347, 1034721I-. doi:10.1117/12.2272933 9781510611511 - https://hdl.handle.net/10356/106342 http://hdl.handle.net/10220/49604 10.1117/12.2272933 en NRF-CRP13-2014-01 - Proceedings of SPIE - Optical Trapping and Optical Micromanipulation XIV Copyright 2017 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. 5 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Particle Jumping
Optical Manipulation
Engineering::Mechanical engineering
spellingShingle Particle Jumping
Optical Manipulation
Engineering::Mechanical engineering
Shi, Yuzhi
Sha, Xiong
Zhang, Yi
Chin, Lip Ket
Wu, Jiuhui
Chen, Tianning
Liu, Ai Qun
Particle trapping and hopping in an optofluidic fishnet
description Particle jumping between optical potentials has attracted much attention owing to its extensive involvement in many physical and biological experiments. In some circumstances, particle jumping indicates escaping from the optical trap, which is an issue people are trying to avoid. Nevertheless, particle jumping can facilitate the individual trap in each laser spot in the optical lattice and enable sorting and delivery of nanoparticles. Particle hopping has not been seen in fluid because Fluidic drag force dramatically reduce the dwell time of particle or break the potential well. Here, we observe particle hopping in the microchannel by three reasons, e.g., particle collision or aggregation, light disturbing by pretrapped particle and fake trapping position. We show that commonly ignored particle influence to the light could create a new isolated trapping position, where particle hops to the adjacent potential well. The hopping happens in an optofluidic fishnet which is comprised of discrete hotspots enabling 2D patterning of particles in the flow stream for the first time. We also achieve a 2D patterning of cryptosporidium in the microchannel. Our observed particle hopping in the flow stream completes the family of particle kinetics in potential wells and inspires new interests in the particle disturbed optical trapping. The 2D patterning of particles benefits the parallel study of biological samples in the flow stream and have potential on cell sorting and drug delivery.
author2 Dholakia, Kishan
author_facet Dholakia, Kishan
Shi, Yuzhi
Sha, Xiong
Zhang, Yi
Chin, Lip Ket
Wu, Jiuhui
Chen, Tianning
Liu, Ai Qun
format Conference or Workshop Item
author Shi, Yuzhi
Sha, Xiong
Zhang, Yi
Chin, Lip Ket
Wu, Jiuhui
Chen, Tianning
Liu, Ai Qun
author_sort Shi, Yuzhi
title Particle trapping and hopping in an optofluidic fishnet
title_short Particle trapping and hopping in an optofluidic fishnet
title_full Particle trapping and hopping in an optofluidic fishnet
title_fullStr Particle trapping and hopping in an optofluidic fishnet
title_full_unstemmed Particle trapping and hopping in an optofluidic fishnet
title_sort particle trapping and hopping in an optofluidic fishnet
publishDate 2019
url https://hdl.handle.net/10356/106342
http://hdl.handle.net/10220/49604
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