Nanofluids have garnered a lot of attention for their potential to modify thermal properties, particularly the thermal conductivity. While these modifications have been heavily investigated within the heat transfer and materials community, nanofluids additionally offer [...]
This paper presents our simulation results of pressure-driven water flow through a single (7,7) CNT 2.5nm in length as part of an investigation of the reasons for such high flow rates. A pressure gradient is [...]
Electrophoretic separation in nanofluidic channels exhibits significant differences with microfluidics. We discuss a theoretical / experimental collaboration investigating particle separation by electropohoresis in nanochannels. Recent experimental results in the laboratory of our collaborator Dr. Pennathur [...]
Flow focusing devices (FFD) have emerged as a powerful tool for cell encapsulation and formation of micro-emulsions [1,2]. In the frame of live cell encapsulation, a micro-FFD using alginate solutions for the capsule and powered [...]
Enzyme catalyzed reactions have several advantages over conventional synthetic reactions. The use of enzymes is rapidly increasing in industry. The specificity of enzymes has considerable potential for the production of complex pharmaceutical compounds. Incorporating enzyme [...]
An impulse bio-turbine with circular inlet/outlet area is presented. The system was designed using a scaled impulse macro turbine model, which was modified in size and shape to facilitate transformative integration in implantable biomedical devices [...]
Metallic nanoparticles exhibit a plasmon resonance at optical frequencies that enables efficient conversion of optical to thermal energy at the nanoscale. This photothermal coupling can be leveraged for various applications using femtosecond-pulsed laser illumination tuned [...]
In this work we present a fully automated procedure for the design of microfluidic devices with optimal performance. The proposed approach combines an in-house finite-volume viscoelastic flow solver, an optimizer, and an automatic mesh generation [...]
Nanofluids are a new class of fluids that could significantly improve the thermal properties of fluids used as thermal vectors. They are obtained by dispersing in common fluids (water, glycol, oil) solid nanoparticles (diameter <100 [...]
In extending their applicability , utilization of nanofluids as superior solid-liquid phase change materials (PCM) for thermal energy storage has been proposed recently. This extension of potential utility of nanofluids will require thermal conductivity measurements [...]
Experimental and numerical investigations on the flow through rectangular microchannel are presented. The constant volume technique was used to measure the mass flow rate through rectangular microchannel which had gold deposits on the interior surfaces. [...]
In this work we develop an approach to solve for the effective zeta potential in a channel with nonuniform zeta potentials, such as metal gate electrodes in the channel network for flow control applications. Specifically, [...]
In this paper, we present a novel inexpensive technique to produce superhydrophobic surfaces from porous silicon. Superhydrophobic surfaces are a key technology for their ability to reduce friction losses in microchannels and their self cleaning [...]
In this work, we report a rich sequence of elastic transitions captured experimentally using a solution of polyethylene oxide in a water/glycerol mixture that exhibits shear-thinning and viscoelastic behavior. The experiments were carried out in [...]
Nonconventional processing techniques can lead to the development of materials with unique chemical, physical or mechanical characteristics that make them suitable for specialized applications. One such technique is synthesizing with supercritical fluids, where the unique [...]
Red blood cells (RBCs) are the major cellular component in blood and are highly deformable in their normal state. RBC deformability is important in the delivery of oxygen to the tissues and plays a major [...]
In this pilot study a micro-scale heat exchanger/ spreader was designed and tested. This device is dedicated for the thermal management of microchip hot spots. The basic design consisted of an array of microchannels etched [...]
We demonstrate a dynamic light-induced optoelectroosmosis flow design for E. coli concentration on an organic photoconductive material based biochip. Several traditional approaches of purification and enrichment for bacteria are to use magnetic beads coated with [...]
, Choi J.
, Kim Y.J.
, Lee S.
, Lee W.H.
, Sin J.
, Son S.
, Stephanou H.E.
, Wijesundara M.
, Sungkyunkwan University, KR
EHD (electrohydrodynamics) printing has recently attracted attention for micro/nano size pattern devices due to it can make very small droplet than nozzle diameter and possibility of the use of various ink such as including metal, [...]
A machine vision based system has been developed for measuring in-channel characteristics of droplets for lab-on-chip microfluidic applications. The small, fully integrated system can be used in R&D and in production and combines a high-powered [...]
An implantable biomedical device intended for glaucoma treatment was designed, modeled, fabricated, and tested. Glaucoma is a degenerative eye disease that is normally characterized by high Intraocular Pressure (IOP) and causes progressive vision loss. According [...]
3D integration appears as the key to advanced microelectronic systems. While robotic methods experience difficulties to accommodate fabrication speed and alignment accuracy, self-assembly methods are promising due to their parallel aspect, which overcomes the main [...]
In this study, we developed a novel technique called magnetic hydrogel-based cell patterning (MHCP) to easily achieve heterotypic cell patterning in both of multi-well plate-based methods and microfluidic system. We also demonstrated that the material [...]
This study has been focusing on controlling the size, oxidation, and agglomeration of the nanoparticle by adjusting the plasma of EEWL and the base fluid, including water, ethylene glycols, oil, polymeric solution and other common [...]
Experimental and numerical investigations on nanofluids flows at different geometrical configurations and different thermo-fluid conditions show a significant enhancement on the convective heat transfer while the pumping power cost remains reasonable. However, many problems such [...]
The improvement of thermal conductivity by suspending nanoparticles in two hydrocarbon-based nanofluids is investigated by means of molecular dynamics simulations. Base fluids are methane and ethane and nanoparticles are pure copper. Two temperatures for which [...]
Carbon nanotubes (CNTs) do not disperse very easily in organic media or at low viscosities. Thus, to produce a nanomaterial coating that can be applied by various methods, such as screen printing or ink-jet printing, [...]
Nanofluids are colloidal suspensions which they consist particles in the size range of 100-1 nm. In the recent years nanofluids kept the attention of the scientific community due to their improved thermal physical properties compared [...]
Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational
Published: June 13, 2011
Industry sectors: Advanced Materials & Manufacturing | Sensors, MEMS, Electronics
Topics: Micro & Bio Fluidics, Lab-on-Chip