Journal
LITHUANIAN JOURNAL OF PHYSICS
Volume 50, Issue 2, Pages 201-207Publisher
LITHUANIAN PHYSICAL SOC
DOI: 10.3952/lithjphys.50203
Keywords
two-photon absorption; laser processing; photopolymerization; micro/nanofabrication; three-dimensional structures; tissue engineering
Categories
Funding
- Lithuanian State Science and Studies Foundation [B09/08]
Ask authors/readers for more resources
Laser two-photon polymerization (LTPP) has been widely reported as a tool for three-dimensional micro/nanofabrication. Femtosecond lasers are employed to form nanostructures in photosensitive resins with subwavelength resolution. We demonstrate high throughput large scanning area LTPP system based on linear motor driven stages combined with Yb:KGW high repetition rate (312.5 kHz) amplified laser as irradiation source (515 nm second harmonic's wavelength). Femtosecond green light can be focused to a smaller diffraction limited spot and provides higher structuring resolution comparing to commonly used Ti:sapphire lasers (operating at NIR wavelengths) used for LTPP. Additionally, shorter irradiation wavelength enables to process more of widely used photosensitive materials. The system capacitates production of nanostructures having 200 nm lateral resolution with high repeatability. By modifying focusing optics there is a possibility to scale up the fabrication: reduction of resolution results in shortening of fabrication time. The system enables formation of 3D structures with size varying from tens of microns to tens of millimetres. Most of the materials commonly used for photopolymerization technology (various blends of acrylates, hybrid organic-inorganic materials, and epoxy resins) are well suitable for processing with the constructed LTPP system.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available