期刊
LAB ON A CHIP
卷 14, 期 23, 页码 4533-4539出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4lc00823e
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类别
资金
- NIDCR [R01 DE020891]
- ENIGMA, a LBNL Scientific Focus Area Program
- U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research
- DOE Joint BioEnergy Institute
- US DOE, Office of Science, Office of Biological and Environmental Research [DE-AC02-05 CH11231]
- US DOE's Nuclear Security Administration [DE-AC04-94AL85000]
Picoinjection is a promising technique to add reagents into pre-formed emulsion droplets on chip however, it is sensitive to pressure fluctuation, making stable operation of the picoinjector challenging. We present a chip architecture using a simple pressure stabilizer for consistent and highly reproducible picoinjection in multi-step biochemical assays with droplets. Incorporation of the stabilizer immediately upstream of a picoinjector or a combination of injectors greatly reduces pressure fluctuations enabling reproducible and effective picoinjection in systems where the pressure varies actively during operation. We demonstrate the effectiveness of the pressure stabilizer for an integrated platform for on-demand encapsulation of bacterial cells followed by picoinjection of reagents for lysing the encapsulated cells. The pressure stabilizer was also used for picoinjection of multiple displacement amplification (MDA) reagents to achieve genomic DNA amplification of lysed bacterial cells.
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