A review of optoelectrowetting (OEW): from fundamentals to lab-on-a-smartphone (LOS) applications to environmental sensors

Thio, Si Kuan; Park, Sung-Yong

doi:10.1039/d2lc00372d

Cited by 17 publications

(7 citation statements)

References 111 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[28][29][30][31] Recently, using photoelectric effect-specific materials, local electric fields induced by light irradiation enable multifunctional droplet manipulations. [32][33][34][35][36][37] Further, with a deep understanding of the interaction between charges and droplets, surface charges on electrode-free substrates are also adopted to manipulate droplets. 38,39 Recently, we explored various electric-based droplet manipulation methods by moving the actuation electrode or applying the charge deposition.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional droplet handling on surface-charge-graphic-decorated porous papers

Wu,

Fang,

Zhou

et al. 2024

Lab Chip

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Multifunctional droplet handling on surface-charge-graphic-decorated porous papers

Wu,

Fang,

Zhou

et al. 2024

Lab Chip

View full text Add to dashboard Cite

show abstract

“…Droplet-based microfluidic systems have drawn great interest for various lab-on-a-chip (LOC) applications [ 1 , 2 , 3 , 4 ]. Various chemical or biological compounds are encapsulated in discrete droplets to facilitate numerous independent reactions at an accelerated rate while minimizing the total reagent volume required [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Optical Dielectrophoretic (ODEP) Performance: Position- and Size-Dependent Droplet Manipulation in an Open-Chamber Oil Medium

Islam,

Park

2024

Micromachines

Self Cite

View full text Add to dashboard Cite

An optimization study is presented to enhance optical dielectrophoretic (ODEP) performance for effective manipulation of an oil-immersed droplet in the floating electrode optoelectronic tweezers (FEOET) device. This study focuses on understanding how the droplet’s position and size, relative to light illumination, affect the maximum ODEP force. Numerical simulations identified the characteristic length (Lc) of the electric field as a pivotal factor, representing the location of peak field strength. Utilizing 3D finite element simulations, the ODEP force is calculated through the Maxwell stress tensor by integrating the electric field strength over the droplet’s surface and then analyzed as a function of the droplet’s position and size normalized to Lc. Our findings reveal that the optimal position is xopt= Lc+ r, (with r being the droplet radius), while the optimal droplet size is ropt = 5Lc, maximizing light-induced field perturbation around the droplet. Experimental validations involving the tracking of droplet dynamics corroborated these findings. Especially, a droplet sized at r = 5Lc demonstrated the greatest optical actuation by performing the longest travel distance of 13.5 mm with its highest moving speed of 6.15 mm/s, when it was initially positioned at x0= Lc+ r = 6Lc from the light’s center. These results align well with our simulations, confirming the criticality of both the position (xopt) and size (ropt) for maximizing ODEP force. This study not only provides a deeper understanding of the position- and size-dependent parameters for effective droplet manipulation in FEOET systems, but also advances the development of low-cost, disposable, lab-on-a-chip (LOC) devices for multiplexed biological and biochemical analyses.

show abstract

“…Analysis may be done anywhere is convenient thanks to Bluetooth and Internet access. The smartphone has been used in the identification of iron (II) in a pharmaceutical formulation [11], sensors of environmental [12], and detection of enzymatic urea hydrolysis in microfluidic systems [13]. In this study, a new method was included for total phenol determination in wastewater by basic color analysis (RGB) of samples taken by a smartphone.…”

Section: Introductionmentioning

confidence: 99%

A New Paper-Based Microfluidic Design (µPAD) for the Determination of Total Phenols in Wastewater Using a Smartphone Sensor as a Detector

Mahmoud Yousef Rashed,

Mustafa Abdulkadhim Hussein

2024

J. K. Chem. Sci.

View full text Add to dashboard Cite

Phenols are well-known noxious compounds, that are often found in various water sources. In this research, a new method was used to determine the total phenol by using microfluidic paper-based (µPAD), with a smartphone Sensor. It is portable, inexpensive, and environmentally friendly. The paper was prepared using filter paper by the cutting method. The reagent was dried on the paper. The color sensor of the smartphone device was used as the color intensity sensor of the samples through the images captured by the smartphone through software downloaded to the phone. The focus of the samples is measured from the RGB value of the images taken from the (iPhone 14) device, where each image represents a specific focus. The calibration curve for this method was in the range of M (0.00016–0.5), the correlation coefficient (R2) was equal to (0.9753), the limit of detection was in the amount of (0.000032) M, and the relative standard deviation (RSD%) for the concentration was (0.02) M, for which the examination was repeated (10) times and its value was (0 %), and the recovery value (Recovery%) was equal to (100 %). The method was successfully applied for the determination of total phenols in wastewater.

show abstract

A review of optoelectrowetting (OEW): from fundamentals to lab-on-a-smartphone (LOS) applications to environmental sensors

Abstract: Electrowetting-on-dielectric (EWOD) has been extensively explored as an active-type technology for small-scale liquid handling due to its several unique advantages, including no requirement of mechanical components, low power consumption, and...

Cited by 17 publications

References 111 publications

Multifunctional droplet handling on surface-charge-graphic-decorated porous papers

Multifunctional droplet handling on surface-charge-graphic-decorated porous papers

Optimizing Optical Dielectrophoretic (ODEP) Performance: Position- and Size-Dependent Droplet Manipulation in an Open-Chamber Oil Medium

A New Paper-Based Microfluidic Design (µPAD) for the Determination of Total Phenols in Wastewater Using a Smartphone Sensor as a Detector

Contact Info

Product

Resources

About