Papers:
Evanescent wave-based particle tracking technique for velocity distribution in extended nanochannel
We developed a flow measurement technique of velocity distribution in extended nanochannel (10- 1000 nm), using fluorescent tracer nanoparticles and the evanescent wave which penetrates into a liquid medium with an exponential decay from the [...]
Secondary Microflows in Electrokinetic Transport with Hydrodynamic Slippage Effect
The curved microchannel is frequently encountered in the lab-on-chips because it provides a convenient way for increasing channel length per unit area. The behavior of electrokinetic flow with curvature-induced secondary motion was explored based on [...]
Magnetic Nanoparticle Dynamics and Assembly Phenomena in External Magnetic Fields
The interest in magnetic nanoparticles and ferrofluids has grown substantially in recent years as their applications continue to proliferate. Current applications are diverse and include the transport of biomolecules and therapeutic drugs [1], gene transfection [...]
Numerical Analysis of Microfluidic Magnetic Bead Separation Utilizing an Integrated Array of Magnetic Elements Magnetized by a Homogenous Bias Field
Magnetic particles are finding increasing use in microfluidic and lab-on-a-chip systems especially for bioapplications where they are commonly used to label, sort and separate target biomaterials from a sample. In this presentation we analyze the [...]
Exploiting structural polarization effects for the AC-electrokinetic manipulation of objects and media in cell chips
AC fields induce polarization charges at the structural interfaces inside inhomogeneous media (Maxwell-Wagner polarization). In suspensions or emulsions of micro and nano objects such as particles, oil droplets, air bubbles and biological cells, these structures [...]
Investigation of the Concentration Polarization effect on Nanoparticles using radial micro-nanofluidic devices
We perform ICP using radial silicon nanojunction geometries fabricated by single standard silicon microfabrication for proof of concept concentration operation over 50nm polystyrene nanobeads.We call the devices “Ring like devices” because of the circular shape [...]
Reduction of the Hydrophobicity of Thiol-ene Microfluidic Devices Using an Adsorbed Polymeric Coating
Thiol-ene based materials have gained a considerable interest in the field of micro and nano fluidics because of their physico-chemical properties and their polymerization characteristics. Unfortunately, the hydrophobic nature of this material represents a considerable [...]
Hydrodynamically Confined Microfluidics for Single Cell Measurements
Microfluidics have proven to be a useful tool in cell biology as they allow for precise control of chemistry and hydrodynamic loads at the scale of single cells. Channel-based microfluidics can be difficult to employ [...]
Experimental investigation of the possibility of transporting a droplet over a hydrophilic spot in digital microfluidics
This paper studies the transport of a water droplet over a hydrophilic spot (representing the sensing surface of a biosensor) created on the top plate of a digital microfluidic chip. For this purpose, a closed [...]
A Low-Voltage Droplet Manipulation via Tunable Wetting on a Polypyrrole (DBS) Surface
Xu W., Tian Y., Bisaria H., Ahn P., Li X., Tsai Y-T, Choi C-H, Yang E.H., Stevens Institute of Technology, US
Electrowetting on dielectric (EWOD) technique has been used to manipulate microliter-sized individual droplets for microfluidic application. However, EWOD-based techniques typically require relatively high actuation voltages (12-80V), which is undesirable for biomedical applications or the applications [...]
High throughput leukemia cell(k-562) sorting system based on negative dielectrophoretic force
For high throughput and high separation efficiency, the proposed sorting platform comprises meso-size vertical channel and silicon wafer based micro cantilever-type electrodes for generating n-DEP force and playing a role of micro-channel. To reduce engineering [...]
An Integrated Optofluidic System for Two-Dimensional Focus Point Control
Recently, optical methods have been widely used for biological and chemical detection in microfluidic or lab-on-a-chip systems. Precise adjustment of the optical path among multiple integrated components, such as flow cytometers, optical tweezers, and molecule [...]
Electro-thermal micro-pumps: exploiting structural polarizations at smeared interfaces
Various designs for new AC electro-thermal micro-pumps (ETµPs) are present which exploit AC electro-kinetic forces acting on smeared charges in the bulk of fluids in the presence of a temperature gradient. Measurements of the pump [...]
Metrology for Lab on a Chip Final Product Devices
New metrology tools to measure the critical parameters of internal structures in lab on a chip devices are greatly needed in order to develop standard tests for this technology. Here we present a method that [...]
From Microfluidics for Biotechnology to Biomicrofluidics
In the biotechnology science, microfluidics is constantly adapting to the goals of biologists. Once a precise goal has been identified, biotechnology is searching for the best approaches to meet the demand of biologists. These approaches [...]
Size-Dependent Separation of Human Mesenchymal Stem Cells by Applying Microfluidic Chip Filtration
It is important to separate human bone marrow-derived mesenchymal stem cells (hMSCs) with high multipotential to differentiation and to increase efficacy of cell therapy. We investigated to develop and validate a novel method for collection [...]
Coating Resistance to Biofouling Inception for Freshwater Vehicles
Preventing biofouling in natural bodies of freshwater is important for a wide variety of applications. The relationship between surface properties and antifouling has been the subject of many recent studies, with primary focus on long-term [...]
Multiscale Biomechanical Modeling of the Human Eye
The human eye is a complex organ consisting of multiple different tissues with varying mechanical properties and functionality. Hence, there are many aspects of the biomechanical behavior of the eye that are not understood. In [...]
Studies on Photothermal Effect in Nanofluidic Channel Toward Ultrasensitive Detection of Nonfluorescent Molecules Using Differential Interference Contrast Thermal Lens Microscope
Absorption spectroscopy in nanofluidic channel was investigated for ultrasensitive detection of nonfluorescent molecules in nanospace. Recently, chemical analysis systems have been rapidly miniaturized from microspace to nanospace, which requires ultrasensitive detection of a broad range [...]
Efficiency of a Flat-plate Solar Collector with Water-based MWCNT Nanofluids
In this paper, the efficiency of nanofluid-based flat-plate solar collector is analytically evaluated by use of the extinction coefficient of nanofluids. The water-based multi wall carbon nanotube (MWCNT) nanofluids and water-based Ag nanofluids are selected [...]
Influence of molecular weight of PVP on aggregation and thermal diffusivity of silver-based nanofluids
Agresti F., Barison S., Battiston S., Pagura C., Colla L., Fedele L., Fabrizio M., National Research Council of Italy (CNR), IT
With the aim of preparing stable nanofluids for heat exchange applications and to study the effect of surfactant on the aggregation of nanoparticles and thermal diffusivity, stable silver colloids were synthesized in water by a [...]
Effective Viscosity of the nanofluids: Experimental studying and molecular dynamics simulation
Rudyak V.Ya., Dimov S.V., Krasnolutsky S.L., Ivanov D.A., Novosibirsk State University of Architecture & Civil Engineering, RU
The studying the effective viscosity coefficient of the nanofluids is the object of present paper. Experimentally the viscosity of the nanofluids on basis of ethylene glycol and SiO2 nanoparticles was studied. It was shown that [...]
Nanocarbon Nanofluids: Comparisons Between Morphology and Nanostructure
Reported here are experimental results of studies designed to identify the operable mechanisms responsible for the gains in thermal conductivity of nanofluids based on nanocarbons. Comparison of functionalized versus nonfunctionalized nanocarbons addresses the effect of [...]
Ultrasound absorption in magnetic nanofluids
Sokolov V.V., Nadvoretskiy V.V., Moscow State University of Instrument Engineering and Computer Science, RU
Mechanisms of ultrasound absorption in magnetic nanofluids at the absence of external magnetic field are theoretically studied in the first part of the paper. The novel magnetodynamic mechanism of ultrasound absorption is introduced – it [...]
Thermal Performance of Silver/Water Nanofluids in Heat Exchangers
Nanofluids are fluid formed by dispersing solid particles of size ranging 1-100 nm (nanoparticles) in a given base fluid such as water or oil, for example. Regarding to the thermal potential, the researches on nanofluids [...]
Modeling Thermophoresis (Soret Effect) in Nanofluids
Thermophoresis plays an important role in forced and natural convection in channels and enclosures when nanofluids are used instead of pure fluids. Therefore, in order to be able to estimate the extent and role of [...]
Experimental investigation on solidification behavior of water based CNT nanofluids for cool thermal storage system
Nano-enhanced phase change material (NEPCM) was prepared by two step method using distilled water as the base fluid, sodium dodecyl benzene sulphonate (SDBS) as a surfactant, pseudomonas as nucleating agent and multi-walled carbon nanotubes (MWCNT) [...]
Alignment of Different Functional Single Wall Carbon Nanotubes using Fe2O3 Nanoparticles under External Magnetic Field
In this work we describe a new approach to align functionalized single walled carbon nanotubes (SWNTs) by γ-Fe2O3 in the presence of an external magnetic field without using chemical surfactant. Five different functionalized SWNTs are [...]
Possible explanations of the deviations in the thermal conductivity measurements
Nanofluids were invented to enhance thermal conductivity of the working fluid near the wall region, where the conduction is the only mechanism to dissipate heat and it limits the heat transfer rate from a body [...]
Nanofluidics: Wetting and Spreading Phenomena and Applications
Suspensions of nanometer-sized particles in liquids (nanofluids) are used in a variety of technological applications and biological systems. For example, their spreading and adhesion behavior on solid surfaces can yield materials with desirable structural and [...]
Engineered Nanofluids for Heat Transfer and Novel Applications
Nanofluids are the new expanding area in nanotechnology, with applications as wide as biomedical, lubrication, thermal management, energy generation, energy conversion, and energy storage. Variety and unique characteristics of nanomaterials allow for engineering the multifunctional [...]
Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2013: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational (Volume 2)
Published: May 12, 2013
Industry sector: Sensors, MEMS, Electronics
Topic: Modeling & Simulation of Microsystems
ISBN: 978-1-4822-0584-8