Katsumata Research Group

Katsumata Research Group

Assistant Professor
Phone: 577-1121
Email: katsumata@mail.pse.umass.edu

Degree Information:

B.Eng. Organic and Polymeric Materials, Tokyo Institute of Technology, 2009
M.Eng. Organic and Polymeric Materials, Tokyo Institute of Technology, 2011
Ph.D. Chemical Engineering, The University of Texas at Austin, 2016

Mailing Address:

Department of Polymer Science and Engineering
Room: A516, Conte Research Center
University of Massachusetts Amherst
120 Governors Drive
Amherst, MA 01003

Research Interests

Directed Self-Assembly of Functional Materials on Non-Ideal Surfaces

Current Research

Our goal is to bridge between fundamental understanding and engineering of nanopatterned functional materials (e.g. 2D materials and novel metals) on non-ideal surfaces (e.g. flexible substrates) towards applications such as light harvesting devices and bio-sensors.  To access the extreme properties of these materials, we leverage the self-assembly of polymers and functional nanomaterials by tailoring interfacial chemistry and nano-processing.  Our system development begins with synthesis and carries through processing and characterization; we synthesize homo and block copolymers via radical based controlled polymerization methods and end-group functionalization, and process them to ultrathin films, nanofibers, and nanocomposites.  The structure-optoelectronic property relationships of these materials are our primary interest.  We characterize the micro-nano structure of the materials by X-ray scattering, electron microscopes, and atomic force microscopy, while optoelectronic properties are investigated by UV to IR absorption behavior.  From a fundamental perspective, we study kinetics of structure development and polymer dynamic under nanoconfinement by fluorescent microscopy; this understanding will be translated into system design.  These efforts push nanopatterning technology based on traditional silicon-based substrates to the next generation, where most electric devices will be flexible and wearable.

Keywords: Directed self-assembly, patterning on non-ideal surfaces, hierarchical metasurfaces, nanoconfinement, block copolymers, 2-D materials, fluorescent microscopy