Steady multiphase flow in two-dimensional (2D) porous media has not been established without the continuous fluctuation in pore occupancy. Cox (2019) proves the ability of liquid to bridge a gas-filled pore throat that is narrow and deeply etched, allowing liquid and gas to flow simultaneously. In this investigation, a pore network study was done t...
Published in Angewandte Chemie (International ed. in English)
Self-digitization dielectrophoretic (SD-DEP) chip was designed by employing the traditional DEP and insulator DEP to create the local electric field for single-cell manipulation and downstream nucleic acid analysis. The multistep procedures of cell manipulation, lysis, and chemical analysis were performed in the integrated microdevice, consuming mi...
Drug carrier development is a financially taxing process. There are a plethora of ongoing studies in academia and industry aimed towards understanding and solving problems within every stage involved in drug discovery, design, and testing starting from the bench top in vitro continuing onwards to in vivo animal models and finally, concluding with F...
Due to the difficulty in sample introduction, the presence of air bubbles and the complicated fabrication with high cost, there are no commercial products of microfluidic polymerase chain reaction (microPCR) on the market yet. In this study, an air bubble resistant and disposable microPCR chip was developed. A simple fabrication method using Norlan...
Published in The journal of physical chemistry letters
Biological cilia play a critical role in a stunning array of vital functions, from enabling marine organisms to trap food and expel fouling agents to facilitating the effective transport of egg cells in mammals. Inspired by the performance of these microscopic, hair-like filaments, researchers are synthesizing artificial cilia for use in lab-on-a-c...
G-protein-coupled receptors (GPCRs) stimulate signaling networks that control a variety of critical physiological processes. Static information on the map of interacting signaling molecules at the basis of many cellular processes exists, but little is known about the dynamic operation of these networks. Here we focus on two questions. First, Is the...
Published in Journal of micromechanics and microengineering : structures, devices, and systems
Microfluidic systems enable reactions and assays on the scale of nanoliters. However, at this scale nonuniformities in sample delivery become significant. To determine the fundamental minimum sample volume required for a particular device, a detailed understanding of mass transport is required. Co-flowing laminar streams are widely used in many dev...
Adhesion energies are determined for three different polymers currently used in adhesive wafer bonding of silicon wafers. The adhesion energies of the polymer off-stoichiometry thiol-ene-epoxy OSTE+ and the nano-imprint resist mr-I 9150XP are determined. The results are compared to the adhesion energies of wafers bonded with benzocyclobutene, both ...
We present a method for PDMS microfabrication of fragile membranes and 3D fluidic networks, using a surface modified water-dissolvable release material, poly(vinyl alcohol), as a tool for handling, transfer and release of fragile polymer microstructures. The method is well suited for the fabrication of complex multilayer microfluidic devices, here ...
Published in Microfluidics and Nanofluidics
Microfluidic channels with integrated pillars are fabricated on SU8 and PDMS substrates to understand the capillary flow. Microscope in conjunction with high-speed camera is used to capture the meniscus front movement through these channels for ethanol and isopropyl alcohol, respectively. In parallel, numerical simulations are conducted, using volu...
