Publications by authors named "Mohammad Abutayeh"
This work demonstrates the fabrication of electrically tunable films of graphene oxide (GO). GO thin films were deposited and micropatterned on a cyclic olefin copolymer (COC) substrate using a plasma-enhanced liftoff technique. This article discusses thermal, chemical, and photoreduction methods for controlling the electrical conductivity of the patterned film.
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- Researchers have developed a new, straightforward method to create thin porous metal films on various substrates using gold and graphene oxide.
- The process involves layering gold on a substrate, spin coating with graphene oxide, etching the gold, and finally removing the graphene layer, allowing for control over the film's porosity.
- The resulting porous gold films, useful for electrodes in microfluidic systems, improve the efficiency of manipulating living cells with dielectrophoresis by enhancing the forces applied.
This short communication presents the proof-of-concept of a novel dielectrophoretic lab-on-chip for identifying/separating circulating tumor cells for purposes of liquid biopsy. The device consists of a polydimethylsiloxane layer, containing a microchannel, bonded on a glass substrate that holds two sets of planar interdigitated transducer electrodes. The lab-on-chip is operated at a frequency that enables dielectrophoretic force to sort cells, based on type, along the lateral direction.
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- Developed a dynamic model to predict microparticle movements in microfluidic devices using dielectrophoresis for Hyperlayer field-flow fractionation.
- The model uses finite-sized electrodes aligned on top and bottom walls of the microchannel, applying Laplace's equation for electric potential and Newton's second law for particle motion.
- Key findings indicate that above a certain flow rate, microparticle radius does not affect levitation height, while microchannel depth, electrode spacing, and actuation voltage do impact the steady-state height.