期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 282, 期 -, 页码 831-837出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.11.135
关键词
Paper-based digital microfluidics; Electrohydrodynamic jet printing; Two-dimensional array; 3D circuitry
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2017R1A2B2006964, 2017R1E1A1A01075353]
- National Research Council of Science & Technology (NST) grant by the Korean government (MSIT) [CMP-16-04-KITECH]
- National Research Foundation of Korea [2017R1E1A1A01075353, 2017R1A2B2006964] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Double-sided electrohydrodynamic jet printing of circuitry using silver nanowires (AgNWs) and dispensing of high viscosity silver nanoparticles (AgNPs) is demonstrated for the first time in the fabrication of a two-dimensional array of electrodes (3D circuitry) on a single sheet of paper. The penetration of AgNW ink through the paper's thickness by capillary imbibition allows for multilayer electrical access to connect the individual electrodes. This makes it an automated and efficient choice as the functional area of the device is conserved and the surface of the paper is preserved. This allows for two-dimensional droplet manipulation on a paper-based digital microfluidics (PBDMF) platform. Compared to printed circuit board technology, paper-based electronics offer a range of desirable properties: they are light weight, portable, economical, flexible, biodegradable, and the materials are abundantly available. The fabricated PBDMF chip is demonstrated to be a low-cost, fully re-configurable, and disposable point-of-care diagnostic platform for the environmental sensing of pesticide using organophosphorus hydrolase enzyme through colorimetric detection via smartphone.
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