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Stable nonpolar solvent droplet generation using a poly(dimethylsiloxane) microfluidic channel coated with poly-p-xylylene for a nanoparticle growth

Title
Stable nonpolar solvent droplet generation using a poly(dimethylsiloxane) microfluidic channel coated with poly-p-xylylene for a nanoparticle growth
Authors
Lim, H[Lim, Heejin]Moon, S[Moon, SangJun]
DGIST Authors
Lim, H[Lim, Heejin]; Moon, S[Moon, SangJun]
Issue Date
2015-08
Citation
Biomedical Microdevices, 17(4)
Type
Article
Article Type
Article
Keywords
Air-Nonpolar Solvent InterfaceChemical AnalysisCross Sectional AreaDropsFluidic DevicesMicro-Fluidic ChannelMicro-Fluidic DevicesMicro-FluidicsMicrochannelsNanocrystal GrowthNanocrystalsNanoparticle GrowthsNon-Polar SolventsPDMSPoly-P-XylylenePolydimethylsiloxane (PDMS)Pulse Width ModulationSolventsSwellingWater Absorption
ISSN
1387-2176
Abstract
Applications of microfluidic devices fabricated in poly(dimethylsiloxane) (PDMS) have been limited to water-based analysis rather than nonpolar solvent based chemistry due to a PDMS swelling problem that occurs by the absorption of the solvents. The absorption and swelling causes PDMS channel deformation in shape, and changes the cross sectional area making it difficult to control the flow rate and concentrations of solution in PDMS microfluidic channels. We propose that poly-p-xylylene polymers (parylenes) are chemical vapors deposited on the surfaces of PDMS channels that alleviate the effect of solvents on the absorption and swelling. The parylene coated surface sustains 3 h with a small volumetric change (less than 22 % of PDMS swelling ratio). By generating an air-nonpolar solvent interface based on droplets in PDMS channel, we confirmed poly-p-xylylene coated PDMS microfluidic channels have the potential to be applicable to nanocrystal growth using nonpolar solvents.
URI
http://hdl.handle.net/20.500.11750/2338
DOI
10.1007/s10544-015-9974-5
Publisher
Springer
Files:
There are no files associated with this item.
Collection:
Robotics EngineeringCybernetics Laboratory1. Journal Articles
Robotics EngineeringETC1. Journal Articles


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