Alexandra Garraud's Research Group

IMG 2018 Kick-Off Meeting

Submitted by Andrea Faria on Wed, 08/22/2018 - 10:09pm

Congratulations to all of this year's IMG Award recipients, and a special thanks to all those who have contributed to our group. This year's kick-off meeting focused on the future of our group, and making it evident that "our most valuable asset is you". Let us continue working as a team and setting a precedent for research groups all around. 

The IMG Awards recognize outstanding achievements and contributions of student members in our organization. The research award honors the exceptional academic impact the students have made in their field, and the service award acknowledges the hard work the students have put into improving and maintaining the quality of IMG.

  •  Xiao Jiang won the IMG Excellence in Research.
  •  Nicolas Garraud and Richard Rode won the IMG Excellence in Service.

2017 IMG Annual Report

Submitted by Nicolas Garraud on Tue, 08/21/2018 - 2:14pm

The IMG faculty are pleased to release the IMG annual report for the calendar year 2017. This document is a record of the group activities, achievements and finances for the previous year. You are encouraged to refer to this document if needed.

The 2017 IMG Annual Report can be downloaded here.

IMG Kickoff Meeting

Submitted by David Arnold on Thu, 08/02/2018 - 11:31am
Event date: 
Tue, 08/21/2018 - 11:45am to 1:30pm

With the Fall semester arriving, we will be having our IMG Kickoff Meeting on August 21, 2018 (day before classes start) from 11:45AM to 1:30PM. During this meeting, we'll discuss important IMG updates, introduce new members, recognize our accomplishments over the last year, and present some IMG awards. We may also try to take a group photo, so if you have a IMG polo or t-shirt, please wear it.

Please note, all IMG members are expected to attend this meeting. Pizza and drinks will be provided.

IMG @ Hilton Head 2018

Submitted by Nicolas Garraud on Tue, 03/20/2018 - 4:50pm

IMG will be well-represented at the upcoming Hilton Head Workshop in June 2018: 

Microfabricated Electrodynamic Wireless Power Receiver for Bioimplants and Wearables (Oral)
Nicolas Garraud, Daniel Alabi, John D. Varela, David P. Arnold, and Alexandra Garraud

Robust and Scalable Tissue-Engineerined Electronic Nerve Interfaces (Oral)
Cary Kuliasha, Benjamin Spearman, Eric W. Atkinson, Abbas Furniturewalla, Paritosh Rustogi, Sahba Mobini, Elizabeth A. Nunamaker, Anthony Brennan, Kevin Otto, Christine Schmidt, and Jack W. Judy

Batch-Fabrication of Diamagnetically Levitated Microrobots (Oral)
Camilo Velez, Ron E. Pelrine, and David P. Arnold

Increasing the Thickness and Deposition Rate of High-Performance Electroplated CoPt Permanent Magnets (Poster)
Yuzheng Wang, Jacob Ewing, and David Arnold

A Nanomechanical Identification Tag Technology for Traceability and Authentification Applications (Poster)
Mehrdad Ramezani, Angela R. Newsome, Mayur Ghatge, Fengchao Zhang, Swarup Bhunia, and Roozbeh Tabrizian

High Kt2·Q Lamb-Wave ScAlN-On-Silicon UHF and SHF Resonators (Poster)
Mayur Ghatge, Valeriy Felmetsger, and Roozbeh Tabrizian

IMG Seminar: Dr. Alexandra Garraud and Todd Schumann

Submitted by Renuka Bowrothu on Wed, 01/24/2018 - 3:58pm
Event date: 
Fri, 01/26/2018 - 11:45am

This week, the speakers for the IMG Seminar are:

11:55-12:20 pm: Dr. Alexandra Garraud on "Extending the range of wireless power transmission for bio-implants and wearables" 

12:20-12:45 pm: Todd Schumann  on "Solely calcine controlled ferroelectric/memristor behavior in barium titanate"

 

Miniature Wireless Charging System for Cluttered Environments

There is an increasing demand for wireless power charging of mobile electronic devices, electric vehicles, biomedical implants and IoT sensor networks. Many of the already available wireless power transmission systems are based on inductive coupling and the size ranges in the cm’s scale, linked to the large surface area requirement. A competing technology is based on an RF approach, with small size chip but impractical power levels of pW to µW, and efficiency close to unity.

Daniel Alabi, Nicolas Garraud and John Varela won the Best Poster and the Best Demo Awards at the MIST 2017 Fall Meeting

Submitted by Alexandra Garraud on Fri, 12/15/2017 - 2:27pm

Congratulations to Daniel Alabi, Nicolas Garraud and John Varela for winning the Best Poster and the Best Demo Awards at the MIST 2017 Fall Meeting for their project "Chip-Scale MEMS Receivers for Low-Power Wireless Charging."

Advisors: Dr. Alexandra Garraud and Dr. David Arnold

2016 IMG Annual Report

Submitted by Alexandra Garraud on Tue, 09/05/2017 - 2:15pm

The IMG faculty are pleased to release the first IMG annual report for the calendar year 2016. This document is a record of the group activities, achievements and finances for the previous year. You are encouraged to refer to this document if needed.

The 2016 IMG Annual Report can be downloaded here.

IMG Kickoff Meeting

Submitted by Todd Schumann on Thu, 08/03/2017 - 10:03am
Event date: 
Fri, 08/18/2017 - 11:45am to 1:30pm

Welcome back from a great summer IMG members!

As the Fall semester moves closer, we will be having our IMG Kickoff Meeting on August 18, 2017 from 11:45AM to 1:30PM. During this meeting, we'll cover all manner of IMG topics and introduce new members to the group. We will also be taking our group photo, so if you have a IMG polo or t-shirt, feel free to wear it.

Please note, all IMG members are expected to attend this meeting! Pizza and drinks will be provided as well!

Chip-Scale MEMS Receivers for Low-Power Wireless Charging

There is an increasing demand for wireless power charging of mobile electronic devices, electric vehicles, biomedical implants and IoT sensor networks. Many of the already available wireless power transmission systems are based on inductive coupling and the size ranges in the cm’s scale, linked to the large surface area requirement. A competing technology is based on an RF approach, with small size chip but impractical power levels of pW to µW, and efficiency close to unity. The alternative working principle that we propose results in a more compact solution that can be reduced to mm’s chip size while producing reasonable output power (1 mW range) at low frequency ranges (50 Hz to 1 kHz).

We have developed an electrodynamic wireless power transmission (EWPT) system that relies on the magnetic-to-mechanic-to electrical conversion from a transmitter to a remote resonator, through electrodynamic transduction. The mechanical motion of a permanent magnet is converted into electrical power, when the magnet is set in motion/rotation, by a time-varying magnetic field, next to the receiver windings.