[BNC-all] BNC Seminars (Monday Jan 30, 11am; Friday Feb 3, 11am and 2pm)

[Shakouri, Ali]

Dear All,

I encourage you to attend the following seminars (see the abstracts below):

·         Development of Electrochemical Tools for Preventive Care Using Paper, Microfluidic and Spectroscopy

o    Prof. Frédérique Deiss from IUPUI

o    Monday Jan. 30th, 11am; Birck 1001

·         Development of Iontronics (ionic liquid electrolytes for novel field effect devices)

o    Dr. Shimpei Ono, Researcher at CRIEPI, Japan and Institute Neel, France

o    Friday February 3rd, 11am; Birck 1001

·         Recent Advances in 4H-SiC Crystal Growth and Defect Control for High-Performance Power Devices (giving also a brief overview of CRIEPI)

o    Dr. Hidekazu Tsuchida, Deputy Associate Vice President, Central Research Institute of Electric Power Industry (CRIEPI), Japan

o    Friday February 3rd, 2pm; Birck 1001


Best regards,
Ali


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Development of Electrochemical Tools for Preventive Care Using Paper, Microfluidic and Spectroscopy
Prof. Frédérique Deiss
IUPUI
Monday, January 30th at 11:00 am
Birck 1001

Abstract: High-technology was critical to push progress in diagnostics, monitoring of patients, drug discovery and biological and chemical analysis. The past decades also saw a large effort towards low-cost diagnostics tools for point-of-care (POC) due the cost, maintenance and infrastructure associated with it preventing a global access to those hi-tech tools. Paper is available everywhere and although we use it less and less at home or in the office with the all-electronic era, paper can be an interesting substrate for scientists. Light-weight, versatile, flexible and globally available, paper is a good candidate for portable, low-cost and simple platforms that permit efficient and convenient analysis at the POC.
Electrolytes imbalances measured in blood or sweat are also useful for health assessment as well as nutrition quality control. Ion-selective electrodes (ISE) usually utilized can be fragile, costly, and subject to biofouling. We are generating micronutrients sensing platforms based on voltammetric solid-state ion-sensing, using potassium as first target. A particular appeal of this analytical method is its high potential for miniaturization. We will develop ion-sensing nano-electrodes permitting quantification of ionic analytes at specific locations typically unreachable with ISE such as in between cells in a 3D culture. We are also developing paper-based devices for easy in-field collection and detection of anions such as chlorate and bromate. They are used in explosives, pesticides, weed killers and thus can also be harmful when present at high concentrations in drinking water.
Paper can also support culture of bacteria. By combining culture capabilities and electrochemistry, we are generating electrochemical paper-based devices for the culture and detection of bacteria. To quantify bacteria with high sensitivity and without pre-concentration by culture, we are designing a reverse electrochemiluminescent (ECL) assay, where bacteria confined in small droplets will decrease the amount of electrochemically generated light. In parallel to demonstrating the ECL detection of bacteria, sub-team of our group work on the design and fabrication of microfluidic generator of droplets out of polydimethylsiloxane (PDMS).
In our interdisciplinary research group, we combine Electrochemistry with other area of Chemistry-Physics, Materials and Biology to generate innovative bioanalytical tools. Our objective is to improve public and global health through better diagnostics and preventive testing

Bio: Frédérique Deiss was born in North-East of France and moved to Bordeaux (South-West of France) for her Engineering degree in Chemistry and Physics from the National Engineering school of Chemistry and Physics of Bordeaux, in 2006. She received her PhD in Chemistry-Physics in 2009, from the University of Bordeaux, working on opto-electrochemical biosensors using optical fibers with Professor Neso Sojic. During her PhD, she was also a visiting scholar at Tufts University, Boston and in the Italian Universities of Venice and Padova. Frédérique held a postdoctoral position at Harvard University with George Whitesides and then at the University of Alberta, Edmonton in Canada until joining IUPUI. She started as an assistant professor in the department of Chemistry & Chemical Biology of IUPUI in August 2015. Her group develops bioanalytical tools (assays, devices, ...) to help improve preventive care using in particular electrochemistry.


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Development of Iontronics
Dr. Shimpei ONO
Central Research Institute of Electric Power Industry, Japan
Institute Neel, University of Grenoble Alps and CNRS, France
Friday, February 3rd at 11:00 am; Birck 1001

Abstract: Electric field control of charge carrier density has long been a key technology to tune the physical properties of condensed matter, exploring the modern semiconductor industry. One of the big challenges is to increase the maximum attainable carrier density, however it is limited by the quality of gate dielectrics. In this talk, I’m going to show the new technique to modulate carrier density making use of ionic liquid electrolytes. With electrolyte gating, we can modulate up to 10^15/cm2 of carrier density at the interface which is 2 orders of magnitude larger than conventional gate dielectrics and demonstrate that we can indeed control metal-to-insulator and ferromagnetic-paramagnetic transition by electric-field effect doping. I also will show our recent progress using ionic liquid electrolytes.


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Recent Advances in 4H-SiC Crystal Growth and Defect Control for High-Performance Power Devices
Dr. Hidekazu Tsuchida
Central Research Institute of Electric Power Industry, Japan
Friday, February 3rd at 2:00 pm
Birck 1001

Abstract: After brief introduction of CRIEPI and the research topics in Electronic Materials Sector of Materials Science Research Laboratory, our recent achievements in 4H-SiC crystal growth and defect imaging and control techniques will be shown. The topics will include fast CVD bulk growth, large-diameter epitaxial growth, high-resolution or 3D imaging of extended defects and control of point and extended defects, toward high-throughput production of high-quality 4H-SiC wafers and realizing high-voltage and low-loss power devices.

Bio: Hidekazu Tsuchida, Dr., Deputy Associate Vice President, Sector Leader, Electronic Materials, Materials Science Research Laboratory, CRIEPI.  Entered CRIEPI in 1992 and started SiC crystal growth and characterization in 1994 toward realizing next generation power devices for high-voltage power transmission and distribution. Recent research interests include fast 4H-SiC bulk growth by high-temperature CVD, large-diameter thick epitaxial growth and defect control for high-quality crystals and high-performance devices. Since 2016, chief secretary of Advanced Power Semiconductor Division of Japanese Applied Physics Society.
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