10.1371/journal.pone.0115993.g006
George Korir
George
Korir
Manu Prakash
Manu
Prakash
(A) One-to-one mapping demonstrated for the punched code and sequence of droplets generated.
Public Library of Science
2015
paper tapes
example colorimetric water quality assays
punch card programming
volume fluid handling
Card Programmable Microfluidics
microfluidic
paper tape encodes information
PUNCHCARD
microfluidics
2015-03-04 03:42:02
Figure
https://plos.figshare.com/articles/figure/_A_One_to_one_mapping_demonstrated_for_the_punched_code_and_sequence_of_droplets_generated_/1325879
<p>A binary code was implemented (every alphabet assigned a 5 bit code, example “U” = 10101) spelling “PUNCHCARD MICROFLUIDICS”. The presence of a hole in punch card tape (top) results in a single droplet representing a binary value of “1” while the absence of a hole results in no droplet representing a binary value of “0”. Vertical height of each plug represents droplet volume, which is approximately 2.5 nL. (B) Results of a qualitative colorimetric assay to test pH, ammonia, nitrates and nitrites in three samples: deionized water, pond water and seawater. Photographs compare bulk reactions (left image) with microfluidic outlet (right image); (1) pH readings with deionized water having a pH of 7.8, pond water at 8.2 and seawater at 8.8, (2) Ammonia levels in parts per million with deionized water at 0 ppm, pond water at 0.25 ppm and seawater at 0 ppm, (3) Nitrite levels with the deionized and sea water samples showing none and pond water at 2 ppm, (4) Nitrate levels in the water samples with pond water at 160 ppm and the deionized water and sea water samples having none.</p>