Femtosecond laser rapid prototyping of nanoshells and suspending components towards microfluidic devices.
Microfluidic researches are now resorting to advanced micro-nanoprocessing technologies for production of more functional "lab-on-a-chip" systems. However, two-photon polymerization (TPP), a powerful designable micro-nanofabrication approach, has not been put to use on the exciting field, largely due to the difficulties in forming buried channels. Here, we solve the problem by TPP prototyping of nanoshells, for which the usage of the negative tone resin SU-8 is found critical. The fabrication efficiency improved by orders of magnitude, together with the prospect of integration of movable micro-mechanical and optical components into the chip would make TPP a promising enabling tool for the micro-analytical systems. Finally, a 25 microm length functional microvalve in a microfluidic channel was rapidly realized and its "ON" and "OFF" states were tested.
Wu
Dong
D
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130023, China.
Chen
Qi-Dai
QD
Niu
Li-Gang
LG
Wang
Jian-Nan
JN
Wang
Juan
J
Wang
Rui
R
Xia
Hong
H
Sun
Hong-Bo
HB
D007834:Lasers; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods*; D036103:Nanotechnology; D017785:Photons; D011108:Polymers / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013997:Time Factors; D014466:Ultraviolet Rays
D011108:Polymers; D012997:Solvents