Optoelectrofluidic printing system for fabricating hydrogel sheets with on-demand patterned cells and microparticles
Hyun Ji Gi1, Dongsik Han1, Je-Kyun Park1
1Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
Biofabrication
|January 17, 2017
Summary
This study introduces a new optoelectrofluidic printing system for precise microparticle and cell patterning. The system enables the recovery of patterned cells within hydrogel sheets, overcoming previous limitations in optoelectrofluidic applications.
Area of Science:
- Biotechnology
- Microfluidics
- Cell Engineering
Background:
- Optoelectrofluidic (OEF) technology offers precise control for microparticle and cell manipulation.
- A key limitation of OEF has been the inability to recover patterned biological samples for further use.
- This restricts the application of OEF in biological and clinical research.
Purpose of the Study:
- To develop a novel optoelectrofluidic printing system enabling the recovery of patterned microparticles and cells.
- To integrate poly(ethylene glycol) dicarylate (PEGDA) hydrogels for sample encapsulation and harvesting.
- To demonstrate the system's capability for high-resolution, on-demand cell patterning and recovery.
Main Methods:
- Developed an optoelectrofluidic printing system incorporating PEGDA hydrogels.
- Calculated the Clausius-Mossotti factor to assess dielectrophoretic mobility in PEGDA precursor solutions.
- Characterized system control over microparticle number, spacing, and mixture ratios.
- Experimentally determined optimal frequency ranges for patterning human liver carcinoma (HepG2) cells.
Main Results:
- Successfully demonstrated optoelectrofluidic patterning of microparticles and HepG2 cells with single-cell resolution.
- Achieved patterning and printing of HepG2 cells within 5 minutes.
- Defined optimal frequency ranges for efficient dielectrophoretic manipulation of HepG2 cells.
- Successfully recovered cell-patterned PEGDA hydrogel sheets under viable physiological conditions.
Conclusions:
- The novel optoelectrofluidic printing system overcomes harvesting limitations of previous OEF technologies.
- The system facilitates the recovery of patterned microparticles and cells within hydrogel sheets, preserving cell viability.
- This advancement expands the practical applications of optoelectrofluidic patterning in biological and clinical research.
