Journal
JOURNAL OF LASER MICRO NANOENGINEERING
Volume 8, Issue 2, Pages 170-174Publisher
JAPAN LASER PROCESSING SOC
DOI: 10.2961/jlmn.2013.02.0010
Keywords
femtosecond laser micromachining; three-dimensional; microfluidic channel
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Funding
- National Basic Research Program of China [2011CB808102]
- National Natural Science Foundation of China [10974213, 60825406, 61275205, 11204332]
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We demonstrate rapid fabrication of complex three-dimensional (3D) microfluidic channels with lengths up to similar to 6.0 cm within a tiny volume down to similar to 80 nl in glass substrates by femtosecond laser direct writing, which, to the best of our knowledge, is the longest microfluidic channel directly embedded in glass by femtosecond laser microprocessing. The fabrication mainly includes the following two steps: (1) formation of hollow microfluidic channels in porous glass by scanning a tightly focused femtosecond laser beam inside a porous glass immersed in water; and (2) postannealing of the fabricated porous glass sample at similar to 1150 degrees C for consolidation of the sample. The unique 3D capability of our technique allows construction of extremely compact microfluidic devices and systems.
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