Skip to main content Skip to navigation

Welcome to Micro/Nanoelectronics and Energy Laboratory (MNEL)!

Research interests:

(1) Resistive random access memories (ReRAMs), artificial synaptic devices, neuromorphic computing, neural stimulation and recording

(2) MEMS/NEMS for sensing and actuation in chemical, biomedical and harsh environments

(3) Microneedles for transdermal drug delivery

(4) Metal oxide heterojunction photovoltaic cells

(5) Wide bandgap semiconductors (SiC, GaN and Ga2O3) high voltage/power and high frequency devices: SBD, pn diode, BJT, JFET, MOSFET, IGBT, HEMT

(6) Surface plasmon resonance (SPR) chemical and bio sensors

We are grateful to our project sponsors for their supports of our research.

(1) Resistive random access memories (ReRAMs), artificial synaptic devices, neuromorphic computing, neural stimulation and recording

Supported by NSF

 

ReRAMs are promising candidate for next-generation nonvolatile memories. Bioorganic materials based ReRAMs with inherent biodegradable and biocompatible properties represent an important step toward the realization of green and sustainable electronics. We are investigating the capability of such devices for the emulation of an artificial synapse for next-generation neuromorphic computing systems, with potential to replace traditional energy-inefficient computers based on the von Neumann architecture.

 

(2) MEMS/NEMS for sensing and actuation in chemical, biomedical and harsh environments

Supported by NSF

 

Single crystalline 4H-SiC microelectromechanical and nanoelectromechanical systems (MEMS/NEMS) are mechanically robust, chemically inert, electrically stable and biocompatible, desirable for operation in harsh environments such as high temperature, high pressure, radiation, chemical, corrosion, biomedical, ……

However, due to the extreme chemical resistance, undercut SiC to release suspended structures by conventional wet chemical etching is not possible.  We have developed a novel dopant-selective photoelectrochemical etching (PEC) process to solve this challenge.  Some structures are shown here:

 

(3) Microneedles for transdermal drug delivery

Supported by NIH, industry

 

We are developing microneedles for transdermal drug delivery.  The videos below show insertion tests of Si in-plane microneedles on raw chicken.

 

(4) Metal oxide heterojunction photovoltaic cells

Supported by WSU (Commercialization Gap Fund)

 

Currently we are developing a novel technology to significantly improve conversion efficiency of metal oxide heterojunction solar cell.

 

(5) Wide bandgap semiconductors (SiC, GaN and Ga2O3) high voltage/power and high frequency devices

Supported by ONR, industry, WSU (Vancouver Mini-Grant)

 

1. SiC, GaN and Ga2O3 high voltage/power devices for power electronics and power ICs

Applications:

  • Switch mode power supplies
  • Compact DC-DC converters
  • AC motor drives
  • Battery chargers
  • Uninterruptible power supply (UPS)

2. SiC and GaN high frequency transistors for RF and microwave

Applications:

  • Radar
  • Radio communications
  • Test instrumentation
  • Amplifiers
  • Jammers
  • Base station

(6) Surface plasmon resonance (SPR) chemical and bio sensors

We are developing lab-on-a-chip SPR waveguide chemical and bio sensors with ultrahigh sensitivity for sensing in water and other aqueous medium.