Laser Treated Paper for Microfluidic Applications

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Over the past several years, there has been considerable interest in paper as a substrate to create lab-on-a-chip or lab-on-paper devices. Microfluidic structures on paper have the potential to enhance paper-based detection techniques. Such systems offer several important advantages, such as ease of use, disposability, and low cost, while complementing already existing over-the-counter diagnostic tests for diabetes and pregnancy. As for paper, apart from being inexpensive and easy to manufacture, it is almost 100 percent cellulose, a renewable resource. Furthermore, it is compatible with most organic molecules, which makes it suitable for biochemical assays.

Patterning paper to create hydrophilic and hydrophobic structures for microfluidic platforms has several shortcomings, such as limited resolutions (millimeter scale in wax printing), multistep processing, and an inability to easily integrate and embed multifunctional materials on paper.

Researchers at Purdue University have developed a laser based hydrophilic patterning technique for hydrophobic paper. This technology offers higher resolution printing, multi-material patterning capability, material embedment, simultaneous surface processing and micromachining, and is more robust compared to current implementations.

Advantages:
-Ultrahigh resolution printing
-Multi-material patterning capability
-More robust compared to current technologies

Potential Applications:
-Paper-based detection systems
-Diagnostic tests
Mar 8, 2013
NATL-Patent
United States
(None)
(None)

Aug 22, 2011
PCT-Patent
WO
(None)
(None)

Aug 20, 2010
Provisional-Patent
United States
(None)
(None)
Purdue Office of Technology Commercialization
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West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org