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Research Areas

Implantable Electrode, for collecting brain neural signals. Karen Cheung.

Circuits of the Future? Crossed single-walled carbon nanotubes. Dr. Alireza Nojeh.

Micromotors and Sensors: Mechanical parts are etched in silicon. Dr. Edmond Cretu.

Research in our group is in areas:


Research projects:


Micromirror array for adaptive optics

The objective of this project is to build an adaptive micro-optical systems using a 2D micromirror array adaptively controlled through digital signal processing algorithms implemented in reconfigurable hardware (FPGA)

Microfluidic electrochemical sensors for early detection of prostate cancer

By integrating multiple molecular biology assay steps on a single microfluidic platform, we aim to detect the activity of telomerase, an enzyme upregulated in prostate cancer cells. This will hopefully provide detection of prostate cancer than currently possible, and demonstrate better specificity for cancer than prostate-specific antigen (PSA) tests.

Ultrasound imaging using CMUT

CMUT arrays promise a new generation of ultrasound imaging systems, with applications in 3D and 4D (real-time 3D) non-invasive imaging or high-frequency imaging (ultrasound biomicroscopy). The project targets the development of a portable CMUT-based ultrasound imaging system, to be used for breast cancer detection and monitoring.

CARBON NANOTUBE GROWTH AND CHARACTERIZATION

In order to study nanotube electron sources experimentally, a chemical vapor deposition (CVD) reactor was built to grow forests of multi-walled CNTs and single-walled carbon nanotubes lying on a surface.

Inkjet patterning of mammalian cells

Inkjet patterning of mammalian cells

Angular rate sensors for Automobile and Biological projects

Gyroscopes are used to sense angular rate and when used along with accelerometers can be used as effective navigation sensors. Due to their tiny size(1cmx1cm)die and high sensitivity they could be used in minimally invasive surgery.
Modal Analysis

Silicon On Insulator (SOI) based nanophotonics

Silicon waveguides using SOI substrate allow for the fabrication of extremely compact photonic circuits based on standard CMOS processing. The goal of this project is to simulate, design and characterize several highly attractive optical functions based on SOI waveguiding.

Batch-Mode Micro-Electro-Discharge Machining

Place your abstract here...

Magnetically Driven Micro Confocal Imaging System

The objective of this project is to design and construct a confocal imaging engine using MOEMS technology and to couple this with Raman Spectroscopy system in order to form a handheld device with dual complementary capabilities: cellular-level resolved confocal skin imaging combined with accurate and precise Raman spectroscopy of specific subsurface skin microstructures in vivo.

MEMS microscanning lens

A magnetically actuated MEMS scanner with a microfabricated ferromagnetic nickel platform and thermosetting polydimethylsiloxane (PDMS) microlens is demonstrated. The device is driven by an external AC magnetic field, eliminating chip circuitry and thermal deformation from joule heating. The resonant frequency of 215.2 Hz and scanning angle of 23 of the scanner have been demonstrated.

Reversible cell trapping in microfluidic channels using hydrogels

Reversible cell trapping in microfluidic channels using hydrogels

High-Speed Transistor Microring Lasers

Mirco-ring lasers (MRLs) are compact semiconductor lasers, where the output light is coupled directly into a planar waveguide, making them suitable for monolithic integration with other optical components, and promising for optical communications and optical interconnects. We are integrating a heterojunction bipolar transistor (HBT) structure into the MRL, and designing for very high frequency modulation modulation (>40 GHz).

Microflow control technology

We are developing technology for microflow control that is suitable for portable low-cost instruments. Building blocks are fully integratable devices including microvalves, micropumps and micromixers. Concerns are low power consumption, fast response time and low cost.

Thermal Modulation of Microchannel Widths

We develop methods for thermal modulation of the widths of microchannels during operation of microfluidic devices. This allows arbitrary modulation of the channel width after device fabrication so that flow rate and flow velocity can be set independently.

Detection and characterization of pathogenic bacteria

Electrokinetic methods for isolation, concentration, and purification of pathogenic bacteria from complex media. Fabrication of integrated microfluidics for front-end purification followed by genetic and immunological characterization.
DEP setup

Organic Transistors

Application of printing methods in producing organic transistors has promised low-cost electronics, but a printed transistor has a poor performance due to the thick semiconductor layer. Also, most of organic transistors operate at high voltages (> 40V). We are investigating two types of organic transistors, OMESFET and dual gate transistor, to overcome the voltage problem and enhance the performance in a thick film transistor.

Multimodality structural and functional optical imaging

This project aims to develop a multimodality optical imaging system by integrating multiphoton microscopy (MPM) with optical coherence tomography (OCT). MPM is sensitive to cells and extracellular matrix, and OCT to structural interfaces and tissue layers. The system will acquire structural and functional imaging of tissues simultaneously.

MEMS-based antibiofouling surfaces

Protein adsorption at the biomaterial-tissue interface is the first and critical event that initializes a cascade of host responses, including platelet activation, blood coagulation, and complement activation.1 Many approaches have been used to prevent such non-specific biological interactions.This research is investigating an engineering surface that uses micromechanical vibration to minimize protein adsorption.

Fabrication of VCSELs

We are fabricating high-speed VCSELs in GaAs for 850 nm emission. Multi-wavelength VCSEL arrays are being developed. The fabrication is carried out in the AMPEL Nanofabrication Laboratory. We are currently fabricating devices based on sub-wavelength gratings (see e.g. Optics Express 2006 article).
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