Microfluidics

Research that includes: 

  • Microvalves and fluidic flow control
  • Micropumps
  • Modeling of microfluidics
  • Particulate air monitoring
  • Flow Sensors
  • Capillary Pump Loop
  • Optoelectronic Transport & Tweezers

BPN398: Single Cell Electroporation Array with OET/PDMS Integration

Hsan-Yin (Tony) Hsu
Yir-Shyuan Liz Wu
2008

Single cell analysis is an important technology for biological and medical research. The precision of manipulating the location of the single cell (relative to the assay sites or other neighboring cells) is a necessary factor. We have previously demonstrated cell manipulation and separation with optoelectronic tweezers (OET), the goal of this project is to integrate this powerful tool with the micrifluidic devices to provide a complete solution for single cell electroporation.

Project end date: 07/30/08

BPN301: Passive Microfluidic Mixers for Protein Folding Studies

Avinash Kane
2008

The purpose of this study is to design, fabricate and optimize microfluidic mixers to investigate the kinetics of protein secondary structure formation with Synchrotron Radiation Circular Dichroism (SRCD) spectroscopy. SRCD allows us to use wavelengths below 220 nm where differences between the CD spectra of random coil and the various secondary structure types are most pronounced. Microfluidic mixing allows a fast initiation of the protein folding reaction. By combining this with SRCD, we can clarify an intense debate in the protein folding community as to when, in the process of...

MCW2: Direct Image-Actuated Optoelectronic Tweezers

Aaron T. Ohta
2008

Optical manipulation provides a non-invasive, dynamic, and reconfigurable method of trapping, transporting, and sorting cells and other bioparticles. Optoelectronic tweezers (OET) enables optically-controlled cellular manipulation at much lower optical power densities than conventional optical tweezers. This enables the use of direct imaging and incoherent light to create a large (1.3 mm x 1.3 mm) manipulation area for the parallel processing of cells, microparticles, and nanoparticles. The use of direct image-actuated OET allows single-particle control for biological research and...

BPN445: Lab-on-a-Chip with Integrated CMOS Detection for Complex Assays

Lisen Wang
Amy Wu
Paul Liu
Octavian Florescu
2008

The goal of this project is to develop a fully integrated lab-on-a-chip microdevice for performing complex immunological assays and to apply it to the sensitive detection of PAH-protein adducts produced by environmental exposure. The ultimate device will consist of a microfluidic cartridge with embedded sensors capable of performing a wide variety of assays. Specific steps that will be demonstrated include sample preparation, mixing with reagents, incubation, and multiple target detection. Although these capabilities will be demonstrated for the detection of PAH-protein adducts, the...

BPN343: MEMS Biopolymer: Surface Electrophoresis with Functionalized Bilayer Lipid Membranes for Sample Preparation

Thomas H. Cauley III
2008

The goal of this project is to develop a robust, reusable, and automated micro-fluidic platform for the manipulation and use of integral membrane proteins and membrane associated proteins. In particular, the goal will be to use an artificially assembled phospholipid bi-layer membrane as an armature for engineered integral membrane proteins, such as alpha-hemolysin (a virulence factor responsible for the lysis of red blood cells). This functionalized membrane will be tested as an active “filtration” element in a sample preparation system, as a stand alone sensing platform with...

BPN452: Patterned Delivery and Expression of Gene Constructs into Zebrafish Embryos using Microfabricated Interfaces

Tushar Bansal
2009

We present the design, fabrication and results of microfabricated interfaces for the patterned delivery of foreign molecules via electroporation into developing embryos. We show how these systems can be used to ‘draw’ two-dimensional patterns of tracer molecules, DNA and mRNA into the yolk and cells of zebrafish embryos (Danio rerio) at different stages of development. We demonstrate the successful delivery of two-dimensional patterns of trypan blue (normal dye), texas red (fluorescent dye), pCS2eGFP DNA and GFP-mRNA in both chorionated and dechorionated embryos. Both DNA and...

BPN321: Realization of 3D Isotropic Negative-Index-Material (NIM) using Microfabrication Technology

Logeeswaran Veerayah Jayaraman
2009

In this project, we propose to realize for the first time, a three dimensional (3D), homogeneous, isotropic Negative-Index-Material(3D-NIM) implementation which allows left-handed behavior for any direction of propagation and any polarization of the electromagnetic wave using micromachining, microfabrication and microassembly (MEMS) techniques with the aim of establishing a basis platform for massively parallel manufacturing of NIM. Besides having a passive metamaterial, integration of modulation mechanisms with lower metal losses will also be explored. This approach will provide a...

BPN488: Dielectrophoretic Manipulation of Bacteria for Energy and Biological Applications

Cullen R Buie
Erika Parra
2009

Dielectrophoresis (DEP) is the translation of tiny particles, nanometer to micrometer scale, resulting from non-uniform electric fields. Particle motion is dictated by the complex permittivity of the particle, the complex permittivity of the carrier solution (e.g. aqueous buffer), and the local electric field gradient. DEP is an attractive microfluidic manipulation technique because electric fields can be used to exert forces on uncharged particles or biological organisms. DEP has been used in applications ranging from particle separation to bacteria characterization. Here we propose...

BPN345: Biomimetic Microfluidic Silk Gland

David N. Breslauer
2010

We are developing a biomimetic microfluidic device for silk fiber formation that mimics the complexity of in vivo arachnid silk spinning organs. Current methods of fiber formation involve high temperatures and pressures to extrude polymer fibers, which is prohibitive for many biological applications such as tissue engineering. Spiders, however, are able to produce high strength silk fibers under benign conditions. Examination of the spider silk gland reveals that it is essentially a complex microfluidic system. Through in depth understanding of microscopic hydrodynamics, we are...

BPN553: Interactive Materials for Biofabrication

Daniel J. Cohen
2010

Nearly all medical implants and tissue engineered structures (i.e. lab-grown organs) are implanted or grown in a manner where it is difficult to non-destructively assess performance or progress and to make adjustments on the fly. For instance, suppose we wish to engineer a vascular graft to repair a damaged coronary blood vessel. In this case, we would start by taking a scaffold material shaped like a blood vessel and then coating it with endothelial and smooth muscle cells. We would then 'grow' the structure in a bioreactor for a fixed period of time and then implant it into the...