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Professor Jeffrey Hopwood earned a Ph.D. in Electrical Engineering from Michigan State University in 1990 where he studied electron cyclotron resonance plasmas. He also received the M.S. and B.S. degrees from MSU in 1987 and 1985, respectively. He joined IBM at the T. J. Watson Research Center in 1991 as a Post-Doctoral Fellow in the Advanced Materials Laboratory. Following this Post-Doc, he joined Northeastern University in 1993 and was promoted to the rank of full professor in 2006. He became a member of Tufts' Electrical and Computer Engineering Department in September 2006.

Dr. Hopwood has worked primarily in the fields of plasma processing and plasma source design. His current research interests include microplasma-based environmental sensors and novel plasma processes for the fabrication of nanoscale devices. Other research interests are plasma etching and deposition processes for integrated circuit fabrication, ionized physical vapor deposition (I-PVD), and plasma deposition of super-hard coatings.

 

http://www.ece.tufts.edu/people/facultypics/hoskinson.jpgDr. Alan Hoskinson is a Research Professor in the department of electrical and computer engineering.  He earned the Ph.D. in Nuclear Engineering and Engineering Physics, with a minor in Electrical Engineering from the University of Wisconsin in 2009 where he studied DBD plasma actuators.  He is currently examining microplasma physics and applications.

 

Naoto Miura is investigating the internal structure of microplasmas using various diagnostic methods including laser diode absorption.  He is also studying the interaction of microwave energy with microdischarges.  For his MS degree he worked in plasma-enhanced atomic layer deposition methods for nanoelectronic devices.  He is particularly interested in the role that inert-gas metastable atoms play in the desorption of hydrogen from semiconductor surfaces.

 

3QauterWave_2.273GHz.JPGChen Wu is a Ph.D student investigating the stability of long linear arrays of microplasma.  We don’t have his picture yet, so we’re showing you his 110-mm long array of atmospheric pressure argon microplasmas!

 

 

 

Jun Xue's research investigates the charging and concentration of environmental nanoparticles using a microplasma trap.  These trapped nanoparticles can then be detected and sorted using more conventional methods.  This capability is essential as a diagnostic tool for both nanomanufacturing processes that are expected to produce close-tolerance nanoparticles and as an environmental monitor.  Dr. Xue is currently a researcher at Agilent Labs in Santa Clara, CA.

Vince Bu is studying the fundamental properties of helium microplasmas, including the effect of electric field frequency on electron density and optical emission.  These microplasmas are used as excitation sources in analytical chemical instrumentation, such as atomic emission spectrometry, mass spectrometry, and gas chromatography.  Vince is now a Senior RF & Electronic Engineer at Finisar.

James Pringle's research involves designing a microcontroller controlled RF source and control scheme for driving a microstrip split ring resonator.  The RF source will maintain the microplasma produced by the resonator in a stable state by adjusting the drive power and frequency.  A stable microplasma source could be used in portable gas analysers or other applications.  James is currently working at Draper Laboratory in Cambridge, MA.

 

Chandler Downs was an undergraduate research assistant who used Stark broadening of optical emission to measure electron production by an atmospheric pressure helium microplasma.  He is also the lab's webmaster.  Chandler is now a PhD student in the Renewable Energy and Applied Photonics Lab of Prof. Vandervelde at Tufts