Doctoral Dissertation

18.12.2018: New hybrid material for in next generation flexible touch screen? (Shao)


18.12.2018 12:00 — 16:00

Location: Ylistonrinne , FYS1
The latest dissertation of Physics gives important information to the nano-electronic and nano-biotechnology. The flexible transparent conductive thin films (TCFs) could use new complex of the environmental friendly hemisellulose with carbon nanotube. It could use in next generation flexible touch screen. In addition the found of functionality of chi-avidin could be used in biosensors.

M.Sc Dongkai Shao researched in his dissertation of Physics the physical adsorption of various macromolecules on different nanomaterial surfaces, such as the carbon nanotube and graphene. Mainly he focused two types of macromolecules chimeric avidin and hemicellulose.

Chimeric avidin is one of the modifications of avidin family, which are widely used in biotechnology, because of strong avidin-biotin binding. Hemicellulose is one of the most abundant composite in nature, and it is environmental friendly. 

Carbon nanotube with hemicellulose complex is new hybrid material

Considering the widely known good mechanical properties of CNTs, complexes of carbon nanotube (CNT) with hemicellulose could use for example, as flexible transparent conductive thin films (TCFs), which could be used in next generation flexible touch screen.

- Complexes of CNT with hemicellulose are attractive because the hybrid material is soluble in water, while when deposited on a surface as a thin film, they show very high conductivity at reasonable optical transparency, explains Shao.

Topography influences functionality of chi-avidin

Shao also observed different kinds of the topography of chi-avidin, depending on the surface character at the nanoscale. In his research, Shao prove the topography of the chi-avidin in return, which has important influence on their functionality. Shao demonstrated the topography of chi-avidin physical deposition on solid surface depended highly on the properties of the nanoscale sample surface.

M.Sc Dongkai Shao defends his doctoral dissertation “Experimental studies on carbon nanotubes and graphene functionalized via physical adsorption with cellulose and avidinon 18.12.2018 at 12:00 in the lecture hall FYS1 at the physics department. The Opponent is Professor Patrick Wagner (Katholieke Universiteit Leuven, Belgium) and Custos Professor Markus Ahlskog (University of Jyväskylä). The doctoral dissertation is held in English.

Dongkai Shao received his bachelor degree in material physics in 2011 from Northeastern University, China and he obtained his master degree in physics at the Nanoscience Center of the University of Jyväskylä in 2013.

More information:

The dissertation is published in the Department of Physics, University of Jyväskylä Research Report No. 13/2018, 199 p., ISBN 978-951-39-7623-1(print), ISBN 978-951-39-7624-8 (e-print). The link to thesis: