Browsing University of Waterloo by Author "Peng, Ran"
Now showing items 1-8 of 8
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Effects of ionic concentration gradient on electroosmotic flow mixing in a microchannel
Peng, Ran; Li, Dongqing (Elsevier, 2014-11-08)Effects of ionic concentration gradient on electroosmotic flow (EOF) mixing of one stream of a high concentration electrolyte solution with a stream of a low concentration electrolyte solution in a microchannel are ... -
Electrokinetic motion of single nanoparticles in single PDMS nanochannels
Peng, Ran; Li, Dongqing (Springer, 2017-01)Electrokinetic motion of single nanoparticles in single nanochannels was studied systematically by image tracking method. A novel method to fabricate PDMS-glass micro/nanochannel chips with single nanochannels was presented. ... -
Electrokinetic Transport Phenomena in Nanochannels and Applications of Nanochannel-based Devices in Nanoparticle Detection and Molecule Sensing
Peng, Ran (University of Waterloo, 2018-04-12)Nanofluidics investigates transport phenomena, manipulation, and control of fluids and nano-sized objects in fluidic channels with an at least one-dimensional size smaller than 100 nm. At the nanoscale, fluids and objects ... -
Electroosmotic flow in single PDMS nanochannels
Peng, Ran; Li, Dongqing (Royal Society of Chemistry, 2016-05-23)The electroosmotic flow (EOF) velocity in single PDMS nanochannels with dimensions as small as 20 nm is investigated systematically by the current slope method in this paper. A novel method for the fabrication of single ... -
Fabrication of nanochannels on polystyrene surfaces
Peng, Ran; Li, Dongqing (Biomicrofluidics, 2015-05)Solvent-induced nanocrack formation on polystyrene surface is investigated experimentally. Solubility parameter and diffusion coefficient of alcohols are employed to elucidate the swelling and cracking processes as well ... -
Fabrication of polydimethylsiloxane (PDMS) nanofluidic chips with controllable channel size and spacing
Peng, Ran; Li, Dongqing (Royal Society of Chemistry, 2016-08-09)The ability to create reproducible and inexpensive nanofluidic chips is essential to the fundamental research and applications of nanofluidics. This paper presents a novel and cost-effective method for fabricating a single ... -
Particle detection on microfluidic chips by differential resistive pulse sensing (RPS) method
Peng, Ran; Li, Dongqing (Elsevier, 2018-07-01)The resistive pulse sensing (RPS) method has been widely used for characterization of particles, cells, and biomolecules due to its merits of high sensitivity and resolution. This paper investigates working parameters ... -
Separation of nanoparticles by a nano-orifice based DC-dielectrophoresis method in a pressure-driven flow
Zhao, Kai; Peng, Ran; Li, Dongqing (Royal Society of Chemistry, 2016-10-07)A novel DC-dielectrophoresis (DEP) method employing a pressure-driven flow for the continuous separation of micro/nano-particles is presented in this paper. To generate the DEP force, a small voltage difference is applied ...