Imperial College London
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ProfessorEricYeatman

Faculty of Engineering, Department of Electrical and Electronic Engineering

Head of Department of Electrical and Electronic Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6204e.yeatman CV

 
 
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Assistant

 

Ms Anna McCormick +44 (0)20 7594 6189

 
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Location

 

610aElectrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kim:2023:10.1117/1.JBO.28.7.075003,
author = {Kim, JA and Hou, Y and Keshavarz, M and Yeatman, E and Thompson, A},
doi = {10.1117/1.JBO.28.7.075003},
journal = {Journal of Biomedical Optics},
pages = {1--15},
title = {Characterization of bacteria swarming effect under plasmonic optical fiber illumination},
url = {http://dx.doi.org/10.1117/1.JBO.28.7.075003},
volume = {28},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - SignificancePlasmo-thermo-electrophoresis (PTEP) involves using plasmonic microstructures to generate both a large-scale convection current and a near-field attraction force (thermo-electrophoresis). These effects facilitate the collective locomotion (i.e., swarming) of microscale particles in suspension, which can be utilized for numerous applications, such as particle/cell manipulation and targeted drug delivery. However, to date, PTEP for ensemble manipulation has not been well characterized, meaning its potential is yet to be realized.AimOur study aims to provide a characterization of PTEP on the motion and swarming effect of various particles and bacterial cells to allow rational design for bacteria-based microrobots and drug delivery applications.ApproachPlasmonic optical fibers (POFs) were fabricated using two-photon polymerization. The particle motion and swarming behavior near the tips of optical fibers were characterized by image-based particle tracking and analyzing the spatiotemporal concentration variation. These results were further correlated with the shape and surface charge of the particles defined by the zeta potential.ResultsThe PTEP demonstrated a drag force ranging from a few hundred fN to a few tens of pN using the POFs. Furthermore, bacteria with the greater (negative) zeta potential ( | ζ | > 10 mV) and smoother shape (e.g., Klebsiella pneumoniae and Escherichia coli) exhibited the greatest swarming behavior.ConclusionsThe characterization of PTEP-based bacteria swarming behavior investigated in our study can help predict the expected swarming behavior of given particles/bacterial cells. As such, this may aid in realizing the potential of PTEP in the wide-ranging applications highlighted above.
AU  - Kim,JA
AU  - Hou,Y
AU  - Keshavarz,M
AU  - Yeatman,E
AU  - Thompson,A
DO  - 10.1117/1.JBO.28.7.075003
EP  - 15
PY  - 2023///
SN  - 1083-3668
SP  - 1
TI  - Characterization of bacteria swarming effect under plasmonic optical fiber illumination
T2  - Journal of Biomedical Optics
UR  - http://dx.doi.org/10.1117/1.JBO.28.7.075003
UR  - https://www.spiedigitallibrary.org/journals/journal-of-biomedical-optics/volume-28/issue-07/075003/Characterization-of-bacteria-swarming-effect-under-plasmonic-optical-fiber-illumination/10.1117/1.JBO.28.7.075003.full
UR  - http://hdl.handle.net/10044/1/105332
VL  - 28
ER  -
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