Comparing Different Light Models for Virtual Electrodes in Optoelectronic Tweezers

ABSTRACT Optoelectronic tweezers (OET) allow for the physical manipulation of particles of interest via dielectrophoresis (DEP) in microfluidic devices. To produce the nonuniform electric field required to enable DEP, light is used to expose a photoconductive film and create a so‐called virtual elec...

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Vydáno v:Electrophoresis Ročník 46; číslo 17; s. 1333 - 1340
Hlavní autoři: Guzman‐Saleh, Ernesto, Perez‐Gonzalez, Victor H., Martinez‐Duarte, Rodrigo
Médium: Journal Article
Jazyk:angličtina
Vydáno: Germany Wiley Subscription Services, Inc 01.09.2025
Témata:
Comparative studies
Computer Simulation
Dielectrophoresis
Electric fields
Electrodes
Electrophoresis - instrumentation
Electrophoresis - methods
Equipment Design
Light
light‐induced dielectrophoresis
Microfluidic Analytical Techniques - instrumentation
Microfluidic Analytical Techniques - methods
Microfluidic devices
Models, Theoretical
Normal Distribution
Optical Tweezers
optically induced dielectrophoresis
optoelectronic tweezers
Optoelectronics
photoconductive
virtual electrodes
virtual electrodes
optoelectronic tweezers
photoconductive
light‐induced dielectrophoresis
optically induced dielectrophoresis
ISSN:0173-0835, 1522-2683, 1522-2683
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Abstract ABSTRACT Optoelectronic tweezers (OET) allow for the physical manipulation of particles of interest via dielectrophoresis (DEP) in microfluidic devices. To produce the nonuniform electric field required to enable DEP, light is used to expose a photoconductive film and create a so‐called virtual electrode (VE). Several attempts have been made to model the light profile used to excite the photoconductive layer and produce the VE. However, no comparison of the models has been presented in the literature. Here, we present a comparative study among the rectangular, Gaussian, and saturated‐Gaussian models in mapping to light profiles obtained experimentally. These models were then used to predict the activation of a VE and the distribution of the electric field in an OET system. From this comparison, it is possible to conclude that the saturated‐Gaussian model should be the preferred choice to study these systems. Moreover, VEs were also compared numerically to conventional gold electrodes used regularly in DEP applications, concluding that very relevant differences exist between the electric fields produced by these two types of electrodes.
AbstractList Optoelectronic tweezers (OET) allow for the physical manipulation of particles of interest via dielectrophoresis (DEP) in microfluidic devices. To produce the nonuniform electric field required to enable DEP, light is used to expose a photoconductive film and create a so-called virtual electrode (VE). Several attempts have been made to model the light profile used to excite the photoconductive layer and produce the VE. However, no comparison of the models has been presented in the literature. Here, we present a comparative study among the rectangular, Gaussian, and saturated-Gaussian models in mapping to light profiles obtained experimentally. These models were then used to predict the activation of a VE and the distribution of the electric field in an OET system. From this comparison, it is possible to conclude that the saturated-Gaussian model should be the preferred choice to study these systems. Moreover, VEs were also compared numerically to conventional gold electrodes used regularly in DEP applications, concluding that very relevant differences exist between the electric fields produced by these two types of electrodes.
Optoelectronic tweezers (OET) allow for the physical manipulation of particles of interest via dielectrophoresis (DEP) in microfluidic devices. To produce the nonuniform electric field required to enable DEP, light is used to expose a photoconductive film and create a so-called virtual electrode (VE). Several attempts have been made to model the light profile used to excite the photoconductive layer and produce the VE. However, no comparison of the models has been presented in the literature. Here, we present a comparative study among the rectangular, Gaussian, and saturated-Gaussian models in mapping to light profiles obtained experimentally. These models were then used to predict the activation of a VE and the distribution of the electric field in an OET system. From this comparison, it is possible to conclude that the saturated-Gaussian model should be the preferred choice to study these systems. Moreover, VEs were also compared numerically to conventional gold electrodes used regularly in DEP applications, concluding that very relevant differences exist between the electric fields produced by these two types of electrodes.Optoelectronic tweezers (OET) allow for the physical manipulation of particles of interest via dielectrophoresis (DEP) in microfluidic devices. To produce the nonuniform electric field required to enable DEP, light is used to expose a photoconductive film and create a so-called virtual electrode (VE). Several attempts have been made to model the light profile used to excite the photoconductive layer and produce the VE. However, no comparison of the models has been presented in the literature. Here, we present a comparative study among the rectangular, Gaussian, and saturated-Gaussian models in mapping to light profiles obtained experimentally. These models were then used to predict the activation of a VE and the distribution of the electric field in an OET system. From this comparison, it is possible to conclude that the saturated-Gaussian model should be the preferred choice to study these systems. Moreover, VEs were also compared numerically to conventional gold electrodes used regularly in DEP applications, concluding that very relevant differences exist between the electric fields produced by these two types of electrodes.
ABSTRACT Optoelectronic tweezers (OET) allow for the physical manipulation of particles of interest via dielectrophoresis (DEP) in microfluidic devices. To produce the nonuniform electric field required to enable DEP, light is used to expose a photoconductive film and create a so‐called virtual electrode (VE). Several attempts have been made to model the light profile used to excite the photoconductive layer and produce the VE. However, no comparison of the models has been presented in the literature. Here, we present a comparative study among the rectangular, Gaussian, and saturated‐Gaussian models in mapping to light profiles obtained experimentally. These models were then used to predict the activation of a VE and the distribution of the electric field in an OET system. From this comparison, it is possible to conclude that the saturated‐Gaussian model should be the preferred choice to study these systems. Moreover, VEs were also compared numerically to conventional gold electrodes used regularly in DEP applications, concluding that very relevant differences exist between the electric fields produced by these two types of electrodes.
Author Martinez‐Duarte, Rodrigo
Perez‐Gonzalez, Victor H.
Guzman‐Saleh, Ernesto
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Issue 17
Keywords virtual electrodes
optoelectronic tweezers
photoconductive
light‐induced dielectrophoresis
optically induced dielectrophoresis
Language English
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2025 The Author(s). Electrophoresis published by Wiley‐VCH GmbH.
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Snippet ABSTRACT Optoelectronic tweezers (OET) allow for the physical manipulation of particles of interest via dielectrophoresis (DEP) in microfluidic devices. To...
Optoelectronic tweezers (OET) allow for the physical manipulation of particles of interest via dielectrophoresis (DEP) in microfluidic devices. To produce the...
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StartPage 1333
SubjectTerms Comparative studies
Computer Simulation
Dielectrophoresis
Electric fields
Electrodes
Electrophoresis - instrumentation
Electrophoresis - methods
Equipment Design
Light
light‐induced dielectrophoresis
Microfluidic Analytical Techniques - instrumentation
Microfluidic Analytical Techniques - methods
Microfluidic devices
Models, Theoretical
Normal Distribution
Optical Tweezers
optically induced dielectrophoresis
optoelectronic tweezers
Optoelectronics
photoconductive
virtual electrodes
Title Comparing Different Light Models for Virtual Electrodes in Optoelectronic Tweezers
URI https://onlinelibrary.wiley.com/doi/abs/10.1002%2Felps.8131
https://www.ncbi.nlm.nih.gov/pubmed/40099714
https://www.proquest.com/docview/3259955631
https://www.proquest.com/docview/3178828820
Volume 46
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