Fabricating optical fiber imaging sensors using ink jet printing technology: a pH sensor proof-of-concept |
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Authors: | Carter J Chance Alvis Rosa M Brown Steve B Langry Kevin C Wilson Thomas S McBride Mary T Myrick M L Cox W Royall Grove Michael E Colston Bill W |
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Institution: | Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA. Carter45@llnl.gov |
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Abstract: | We demonstrate the feasibility of using Drop-on-Demand microjet printing technology for fabricating imaging sensors by reproducibly printing an array of photo-polymerizable sensing elements, containing a pH sensitive indicator, on the surface of an optical fiber image guide. The reproducibility of the microjet printing process is excellent for microdot (i.e. micrometer-sized polymer) sensor diameter (92.2+/-2.2 microm), height (35.0+/-1.0 microm), and roundness (0.00072+/-0.00023). pH sensors were evaluated in terms of pH sensing ability (< or =2% sensor variation), response time, and hysteresis using a custom fluorescence imaging system. In addition, the microjet technique has distinct advantages over other fabrication methods, which are discussed in detail. |
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