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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:


P diffusion in SiGe and SiGe:C

This project is in collaboration with Texas Instruments. It is to systematically investigate P diffusion behavior in SiGe and SiGe:C.

Si stress in Si induced by Cu through-silicon vias (TSVs)

3D integration of integrated circuits is one of the major approaches in research to increase packing density, communication bandwidth and to reduce wire length and energy consumption. Through silicon via is one of the key technology in achieving 3D integration. Cu is used to fill TSVs, which also introduce thermal mismatch stress in the surrounding Si. This project investigate stress dependence on TSV microstructure and annealing process.

3D DOD Bio-Printer

A technology for 3D printing of biological tissue constructs that will better mimic the human physiology and expedite the drug discovery process. The first stage of this work is to develop a disposable and bio-compatible droplet-on-demand (DOD) system.

A Systematic Study of Silicon Germanium Interdiffusion for Next Generation Semiconductor Devices

We systematically study SiGe interdiffusion: 1) we established a unified interdiffusivity model for SiGe interdiffusion under relaxed or tensile strain over the full Ge content range from experimental data and diffusion theories. 2) We will investigate the impact of compressive strain on SiGe interdiffusion in middle to high Ge range. 3) We will study how interdiffusion depends on different dopants and doping levels.

Design, Modeling and Integration of High Sensitive Accelerometers with Adaptive and Non-Linear Control Targeted on FPGA

The countless number of applications urged a demand for high performance micro-accelerometers, which in turn continue to gain momentum. Within that framework, one must justify the need for an approach defined by a system level performance in closed loop integration, by understanding the current performance limitations in the state-of-the-art micro-accelerometers, in research, on the market, and when employed with other electrical components.

Batteries and Supercapacitors

High energy density, high power and long cycle life are all properties that are needed in portable energy sources, particularly for emerging electric vehicles, and multifunctional hand-held devices. We are investigating new materials for use in these electrochemical storage devices with the aim of dramatically improving all aspects of performance. We are also creating printed energy storage devices for use in smart packaging, RFIDs and the like.

Photoacoustic Tissue Imaging

This project aims to design a photoacoustic imaging system for prostate cancer study. Images will be acquired by using a laser to excite acoustic waves from tissues and an ultrasound transducer array to detect the acoustic waves. The photoacoustic imaging will be combined with ultrasound imaging to study prostate cancer.

Optical Antennas

In nanoscale optical devices, both the particle and the wave nature of light can play important roles. This creates new opportunities for engineering the optoelectronic properties, for instance the amount of light absorption in a device.

Controlled Nanofabrication

A significant challenge in research on nanostructures is the lack of sufficient control over the fabrication processes. Therefore, an important aspect of our research is the study of nanostructure fabrication processes with the goal of achieving higher levels of control and reproducibility.

Modeling and Simulation

We use techniques ranging from classical, continuum modeling, to molecular dynamics, to quantum mechanical simulations using the density functional theory and first-principles techniques such as the Hartree-Fock method. We investigate the mechanical properties, electronic structure, transport characteristics and optical properties of nanodevices.

Inkjet patterning of mammalian cells

Inkjet patterning of mammalian cells

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.

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)

Batch-Mode Micro-Electro-Discharge Machining

Place your abstract here...

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

Transport of colloids in microfluidic environments

We design microfluidic environments for targeted investigations of colloid transport. Focus of this work are particle-particle interactions, as well as particle-wall interactions. This study will lead to design recommendations for robust microfluidic devices.

Advanced Fabrication Techniques For Micro/Nano Structures

We develop methods to enhance current microfabrication technologies. Focus of this work is on material functionality and user friendliness.
Advanced Fabrication

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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