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Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies
Published on: July 15, 2013
Laser-induced cell detachment, patterning, and regrowth on gold nanoparticle functionalized surfaces
Tatiana A Kolesnikova1, Dorothee Kohler, Andre G Skirtach
1Department of Interfaces, Max-Planck Institute of Colloids and Interfaces, Am Mühlenberg 1 OT Golm, D14476 Potsdam, Germany. Tatiana.Kolesnikova@mpikg.mpg.de
ACS Nano
|October 17, 2012
Summary
Researchers demonstrate nonthermal cell detachment from gold nanoparticle surfaces using laser light. This technique offers precise control over cell placement for applications in tissue engineering and wound healing.
Area of Science:
- Biomaterials Science
- Cell Biology
- Nanotechnology
Background:
- Fibroblast cells exhibit strong adhesion to nanoengineered gold nanoparticle (AuNP) surfaces.
- Controlled cell manipulation is crucial for applications like tissue engineering and wound healing.
Purpose of the Study:
- To investigate selective cell detachment from AuNP surfaces using laser irradiation.
- To elucidate the nonthermal photochemical mechanism behind laser-induced cell detachment.
- To explore the potential for controlled spatial organization of cells on biointerfaces.
Main Methods:
- Fabrication of AuNP surfaces using lithographic microcontact printing and selective deposition.
- Laser beam profiling to control irradiation patterns.
- Modeling of heat distribution and temperature rise around AuNP surfaces.
- Investigation of reactive oxygen species production under green laser illumination.
Main Results:
- Selective, nonthermal detachment of NIH3T3 fibroblast cells from AuNP surfaces was achieved via laser irradiation.
- Cell detachment effectiveness is influenced by cell age, laser power, and AuNP patterning.
- Laser illumination resulted in minimal heating of nanoparticles.
- A nonthermal photochemical mechanism involving reactive oxygen species was identified as the cause of detachment.
- Cell migration and reattachment were observed in unirradiated areas, enabling surface recovery.
Conclusions:
- Laser-triggered, nonthermal cell detachment from AuNP surfaces provides a method for precise cell patterning.
- The identified photochemical mechanism offers a pathway for developing advanced biointerfaces for cell culture and regenerative medicine.
- The ability for cell migration and reattachment highlights potential for dynamic tissue engineering applications.
