Group Members


Graduate Students

Motao Cao


 Graduate Student

 Zhejiang Univeristy - Hangzhou, China; 2013
 B.S. Materials Science and Engineering


Research: Photonic Sintering of Aerosol-Jet-Printed Inorganic Semiconductor Thin Films

Solution processed Inorganic semiconductor materials have broad potential applications in printing electronics due to their high intrinsic carrier mobility and good environmental stability. However, high annealing temperature (350C) and long annealing time (1h) of semiconductor thin film have been the obstacles for fabrication of printed electrolyte gated transistors (EGTs) on flexible substrate. In this project, we applied photonic sintering to anneal the aerosol jet printed inorganic semiconductor thin film at relative low temperature and short annealing time. Photonic sintering achieves fast heating and fast cooling of the film by giving off pulsed intense light. Fast annealing of the printed film can be achieved without doing damage to flexible substrate. We are looking for a suitable inorganic semiconductor for both photonic sintering and aerosol jet printing and exploring a stable way to obtain a dense and homogeneous semiconductor thin film at low temperature


"Low-Temperature Combustion-Synthesized Nickel Oxide Thin Films as Hole-Transport Interlayers for Solution-Processed Optoelectronic Devices." Bai, Sai, Motao Cao, Yizheng Jin, Xingliang Dai, Xiaoyong Liang, Zhizhen Ye, Min Li. Advanced Energy Materials, 2014, 4, no. 6

Nezhueyotl Izquierdo

izquierdo_nezhueyotl.jpeg  Graduate Student


 University of Texas-Pan American, Chemistry - 12/1/14




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Krystopher Jochem

jochem_krystopher-1_v3.jpeg  Graduate Student

 BS Purdue Univ West Lafayette, ChEn 5/1/15




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Chang-Hyun Kim

kim.jpg  Graduate Student


Seoul National University
 B.S., 2006; M.S., 2008


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Xinglong Ren

ren.jpg  Graduate Student


Bachelor of Science, Shanghai Jiaotong University, 2013


 Research: Charge Transport in Organic Semiconductor Single Crystals

Organic single crystals are ideal system for investigating the intrinsic transport behavior in organic semiconductors. I am working on improving charge transport in organic semiconductor single crystals by device structure optimization. In addition, I am also interested in understanding the structure-property relationship of organic semiconductors by designing and characterizing new organic molecules.


Elliot Schmidt

schmidt.jpg  Graduate Student


St. Olaf College 
B.A. Physics, B.A. Chemistry, B.A. Mathematics

Research: Carrier transport mechanisms in the high carrier regime of organic single crystals and polymers through the use of ion gel gating techniques


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Boxin Tang

tang.jpg Graduate Student

 Bachelor of Arts, Depauw University, 2012


 Research: Ion Gel Block-Copolymer in Application to Organic Thin-Film Transistors


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Mathew Thomas

thomas_mathew_v2.jpeg  Graduate Student

 IIT, Madras, ChEn 7/1/15




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Jeff Walter

walter.jpg  Graduate Student

B.S. Chemistry, B.S. Physics


 Research: Ion gel gating of oxides and sulfides

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Scott White

white.jpg  Graduate Student


The University of Iowa; 2012
B.S.E., Chemical Engineering

Research: Organic Electronic Biosensors

Organic electronics are finding applications in biotechnology and biosensing. My Ph.D. work leverages the unique properties of Electrolyte-Gated Transistors (EGTs) to detect target nucleic acids and proteins transported via a microfluidic system. I also work on improving the performance of printed electronics by optimizing materials, processing and testing.


"Label-Free DNA Sensing Platform with Low-Voltage Electrolyte-Gated Transistors". S.P.White, K.D. Dorfman and C.D. Frisbie. Anal. Chem., 2015, (In Press).

"Neural Pathfinding on uni- and multidirectional Photopolymerized Micropatterns". B.W. Tuft, L. Xu, S.P. White, A.E. Seline, A.M. Erwood, M.R. Hansen, C.A. Guymon. ACS Applied Mater Interfaces, 2014, 6,(14), 11265-11276.

"Effects of Olefin Content and Alkyl Chain Placement on Optoelectronic and Morphological Properties in Poly(thienylene vinylenes)". J.C. Speros, H. Martinez, B.D. Paulsen, S.P. White, A.D. Bonifas, P.C. Goff, C.D. Frisbie, M.A. Hillmyer. Macromolecules, 2013, 46,(13), 5184-5194.

"Photopolymerized Microfeatures for Directed Spiral Ganglion Neurite and Schwann Cell Growth". B.W. Tuft, S. Li, L. Xu, J.C. Clarke, S.P. White, B.A. Guymon, Perez, K.A., M.R. Hansen, C.A. Guymon. Biomaterials, 2013, 34,(1), 42-54.

"An ADMET Route to Low-Band-Gap Poly(3-hexadecylthienylene vinylene): A Systematic Study of Molecular Weight on Photovoltaic Performance". J.C. Speros, B.D. Paulsen, S.P. White, Y. Wu, E.A. Jackson, B.S. Slowinski, C.D. Frisbie, M.A. Hillmyer. Macromolecules, 2012, 45,(5), 2190-2199.


2013 Outstanding TA for Unit Operations

2012 NSF Graduate Research Fellowship Award

2012 CSE Fellowship

2011 NSF Graduate Research Fellowship Honorable Mention


Tao He

tao_he.png Postdoc

 01/2015 - Now  Postdoc, Chemical Engineering and Materials Science, University of  Minnesota,  America.
 09/2012-10/2014 Postdoc, Institut für Organische Chemie, Universität Würzburg, Germany.
 09/2006-06/2012  Master and Ph. D., State Key Laboratory of Crystal Materials, Shandong University, China.

 Research Area:
 Organic single crystal, scanning Kelvin probe microscopy, charge transport.



Woo Jin Hyun


woo_jin.jpg Education: 

 Ph.D. Chemical and Biomolecular Engineering,  KAIST, 2013
 M.S. Chemical and Biomolecular Engineering,  KAIST,  2010
 B.S. Chemical Engineering, Hanyang University,  2008

 Research: Printed Electronics

 Office: 424 Amundson Hall
 Phone: (612) 625-4809

 Co-Advisor: Lorraine Francis


Donghoon Song

donghoon.jpg Postdoc

 Hanyang University; 2015
Ph.D. Energy Engineering

 Research: Printed Electronics


Publication list:



Zuoti Xie


zuotixie.jpg Education:

 Weizmann Institute of Science; 2009-2011
 Post-doctoral researcher

 Fudan University; 2009
 Ph.D Organic Electronics

Research: Organic Electronics

Selected Publications

1. Effect of Heteroatom Substitution on Electronic Coupling in Alkane Dithiol Based Molecular Junctions
Zuoti Xie, Stuart Oram, Christopher E. Smith, Yanfei Wu, Ioan Bâldea, and C. Daniel Frisbie, ACS Nano 2017, 11, 569

2. Large Magnetoresistance at Room Temperature in Organic Molecular Tunnel Junctions with Non-Magnetic Electrodes
Zuoti Xie, Sha Shi, Feilong Liu, Darryl L. Smith, P. Paul Ruden, and C. Daniel Frisbie, ACS Nano 2016, 10, 8571

3. Experimental and Theoretical Analysis of Charge Transport in Oligophenylene Dithiol Junctions as a Function of Molecular Length and Contact Work Function
Zuoti Xie, Ioan Bâldea, Christopher Smith, Yanfei Wu, and C. Daniel Frisbie, ACS Nano 2015, 9, 8022.

4. Uncovering a Law of Corresponding States for Electron Tunneling in Molecular Junctions
Ioan Bâldea,  Zuoti Xie, and C. Daniel Frisbie, Nanoscale 2015, 7, 10465.