Browsing Engineering (Faculty of) by Author "Ren, Carolyn L."
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Droplet formation in microfluidic T-junction generators operating in the transitional regime. I. Experimental observations
Glawdel, Tomasz; Elbuken, Caglar; Ren, Carolyn L. (American Physical Society Physics, 2012-01-26)This is the first part of a two-part study on the generation of droplets at a microfluidic T-junction operating in the transition regime where confinement of the droplet creates a large squeezing pressure that influences ... -
Droplet formation in microfluidic T-junction generators operating in the transitional regime. II. Modeling
Glawdel, Tomasz; Elbuken, Caglar; Ren, Carolyn L. (American Physical Society Physics, 2012-01-26)This is the second part of a two-part study on the generation of droplets at a microfluidic T-junction operating in the transition regime. In the preceding paper [Phys. Rev. E 85, 016322 (2012)], we presented our experimental ... -
Droplet formation in microfluidic T-junction generators operating in the transitional regime. III. Dynamic surfactant effects
Glawdel, Tomasz; Ren, Carolyn L. (American Physical Society Physics, 2012-08-13)This study extends our previous work on droplet generation in microfluidic T-junction generators to include dynamic interfacial tension effects created by the presence of surfactants. In Paper I [T. Glawdel, C. Elbuken, ... -
Droplet Microfluidic System with On-Demand Trapping and Releasing of Droplet for Drug Screening Applications
Courtney, Matthew; Chen, Xiaoming; Chan, Sarah; Mohamed, Tarek; Rao, Praveen P.N.; Ren, Carolyn L. (American Chemical Society (ACS), 2017-01-03)96-Well plate has been the traditional method used for screening drug compounds libraries for potential bioactivity. Although this method has been proven successful in testing doseÐresponse analysis, the microliter consumption ... -
A droplet-based microfluidic platform for rapid immobilization of quantum dots on individual magnetic microbeads
Nguyen, Thu H.; Chen, Xiaoming; Sedighi, Abootaleb; Krull, Ulrich J.; Ren, Carolyn L. (Springer Nature, 2018-06-01)Quantum dots (QDs) provide opportunities for the development of bioassays, biosensors, and drug delivery strategies. Decoration of the surface of QDs offers unique functions such as resistance to non-specific adsorption, ... -
Effective Thermo-Capillary Mixing in Droplet Microfluidics Integrated with a Microwave Heater
Yesiloz, Gurkan; Boybay, Muhammed S.; Ren, Carolyn L. (American Chemical Society (ACS), 2017-02-07)In this study, we present a microwave-based microfluidic mixer that allows rapid mixing within individual droplets efficiently. The designed microwave mixer is a coplanar design with a small footprint, which is fabricated ... -
Experimental study on droplet generation in flow focusing devices considering a stratified flow with viscosity contrast
Chen, Xiaoming; Ren, Carolyn L. (Elsevier BV, 2017-05-18)High throughput analysis is highly demanded in a variety of chemical reactions. Droplet microfluidics offers unique advantages over traditional multi-well plate systems for high throughput analysis such as providing a ... -
Highly pressurized partially miscible liquid-liquid flow in a micro-T-junction. I. Experimental observations
Qin, Ning; Wen, John Z.; Ren, Carolyn L. (American Physical Society (APS), 2017-04-24)This is the first part of a two-part study on a partially miscible liquid-liquid flow (liquid carbon dioxide and deionized water) which is highly pressurized and confined in a microfluidic T-junction. Our main focuses are ... -
Highly pressurized partially miscible liquid-liquid flow in a micro-T-junction. II. Theoretical justifications and modeling
Qin, Ning; Wen, John Z.; Ren, Carolyn L. (American Physical Society (APS), 2017-04-24)This is the second part of a two-part study on a partially miscible liquid-liquid flow ( carbon dioxide and deionized water) that is highly pressurized and confined in a microfluidic T-junction. In the first part of this ... -
Hydrodynamic shrinkage of liquid CO2 Taylor drops in a straight microchannel
Qin, Ning; Wen, John Z.; Ren, Carolyn L. (IOP Publishing, 2018-02-12)Hydrodynamic shrinkage of liquid CO2 drops in water under a Taylor flow regime is studied using a straight microchannel (length/width similar to 100). A general form of a mathematical model of the solvent-side mass transfer ... -
An integrated microfluidic device for the sorting of yeast cells using image processing
Yu, Bo Yang; Elbuken, Caglar; Shen, Chong; Huissoon, Jan P.; Ren, Carolyn L. (Springer Nature, 2018-02-23)The process of detection and separation of yeast cells based on their morphological characteristics is critical to the understanding of cell division cycles, which is of vital importance to the understanding of some diseases ... -
A microfluidic chip integrated with droplet generation, pairing, trapping, merging, mixing and releasing
Chen, Xiaoming; Ren, Carolyn L. (Royal Society of Chemistry (RSC), 2017-03-16)Developing a microfluidic chip with multiple functions is highly demanded for practical applications, such as chemical analysis, diagnostics, particles synthesis and drug screening. This work demonstrates a microfluidic ... -
Microfluidic droplet trapping, splitting and merging with feedback controls and state space modelling
Wong, David; Ren, Carolyn L. (Royal Society of Chemistry (RSC), 2016-07-16)We combine image processing and feedback controls to regulate droplet movements. A general modelling approach is provided to describe droplet motion in a pressure-driven microfluidic channel network. A state space model ... -
Microwave temperature measurement in microfluidic devices
Wong, David; Yesiloz, Gurkan; Boybay, Muhammed S.; Ren, Carolyn L. (Royal Society of Chemistry (RSC), 2016-05-10)In spite of various existing thermometry methods for microfluidic applications, it remains challenging to measure the temperature of individual droplets in segmented flow since fast moving droplets do not allow sufficient ... -
Non-linear, non-monotonic effect of nano-scale roughness on particle deposition in absence of an energy barrier: Experiments and modeling
Jin, Chao; Glawdel, Tomasz; Ren, Carolyn L.; Emelko, Monica B. (Springer Nature, 2015-12-11)Deposition of colloidal- and nano-scale particles on surfaces is critical to numerous natural and engineered environmental, health, and industrial applications ranging from drinking water treatment to semi-conductor ... -
Numerical Study on Single Flowing Liquid and Supercritical CO2 Drop in Microchannel: Thin Film, Flow Fields, and Interfacial Profile
Qin, Ning; Feng, Yu; Wen, John Z.; Ren, Carolyn L. (MDPI, 2018-06-01)Taylor segments, as a common feature in two- or multi-phase microflows, are a strong flow pattern candidate for applications when enhanced heat or mass transfer is particularly considered. A thin film that separates these ... -
On nonequilibrium shrinkage of supercritical CO2 droplets in a water-carrier microflow
Qin, Ning; Wen, John Z.; Chen, Baixin; Ren, Carolyn L. (AIP Publishing, 2018-07-16)We report an experimental study on the hydrodynamic shrinkage of supercritical carbon dioxide (scCO(2)) microdroplets during a nonequilibrium process. After scCO(2 )microdroplets are generated by water shearing upon a ... -
Photocatalytic performances of ZnO nanoparticle film and vertically aligned nanorods in chamber-based microfluidic reactors: Reaction kinetics and flow effects
Zhao, Pei; Qin, Ning; Wen, John Z.; Ren, Carolyn L. (Elsevier BV, 2017-07-15)The nanoparticle seed layer (a film) and vertically aligned nanorods of zinc oxide (ZnO) with different lengths were fabricated within a novel chamber-based microfluidic (microchamber) reactor with a varying height of ... -
Polyamide 6.6 separates oil/water due to its dual underwater oleophobicity/underoil hydrophobicity: Role of 2D and 3D porous structures
Zhao, Pei; Qin, Ning; Ren, Carolyn L.; Wen, John Z. (Elsevier, 2019-02-01)Porous polyamide functionalized by plasma or various coatings has been investigated for oil/water separation. In literature, polyamide has rarely been studied for oil removal, and this work investigated the performance of ... -
Polyamide 6.6 separates oil/water due to its dual underwater oleophobicity/underoil hydrophobicity: Role of 2D and 3D porous structures
Zhao, Pei; Qin, Ning; Ren, Carolyn; Wen, John Z. (Elsevier BV, 2019-02-01)Porous polyamide functionalized by plasma or various coatings has been investigated for oil/water separation. In literature, polyamide has rarely been studied for oil removal, and this work investigated the performance of ...