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HELLO! I'M CHUN-DA.

Chun-Da Liao belongs to Nanodevices group in the department of Nanoelectronics Engineering at INL. He works on massive graphene production and the synthesis of large graphene single crystal through chemical vapour deposition, as well as the advanced graphene application and integration with other 2D materials. 

 

 
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About CHUN-DA

Dr. Chun-Da Liao, winning his EPSRC Research Scholar in 2014  from Renold (Germany based company) and Engineering and Physical Sciences Research Council (United Kingdom), took Research Scientist position in both Material Science Center and National Graphene Institute at the University of Manchester in the United Kingdom, carrying out several industrial projects on the massive production of graphene using chemical vapor deposition, followed by joining BGT Materials (Industrial Partner of National Graphene Institute) as a Senior Research Scientist/Project Leader. 

He received the Ph. D. degree in optoelectronic engineering from National Taiwan University in 2010. During his doctoral study, he won the first place honour in NTU Ph. D. Qualify Examination and published five research papers on the design of microcantilever sensors and MEMS scanning micromirrors. From September 2010 to December 2013, he received NTU Excellent Postdoctoral Fellowship (2010 - 2013, Taiwan), working at Institute of Atomic and Molecular Science, Academia Sinica based in National Taiwan University. During this period, he published five high-impact research papers and one book chapter on the research of graphene synthesis and their applications with 2D materials.

 

 

The Cofund project

Advanced Power Generator Using Graphene Microspiral Coils

The basic concept of this research project originates from conventional electromagnetic power generators converting mechanical energy to electrical energy, which has been extensively utilised in a variety of power plants. The core technique is the design of ultra-thin flexible polyimide/graphene micro-spiral coils, which is used for miniature and high-throughput power generators. The configuration of transparent polyimide/graphene micro-spiral coils is also able to be applied in ultra-thin wireless charging devices, solar/wind hybrid power system and wireless communication system.
The graphene-based micro-spiral coil is flexible, lightweight and ultra-sensitive to the change of the magnetic field. Through the integration of tiny multipole magnets, this project aims to charge/power portable electronic devices through daily human movement such as vibration, walk and run. 

 

Recent research

Large Graphene Single Crystals

In the conventional CVD process, the as-grown continuous graphene film over entire Cu foil could be regarded as the coalescence via many small graphene grains with lateral size less than 50-60 µm. The dense graphene boundaries on continuous graphene films would introduce severe carrier scattering which degrades carrier mobility of graphene films, therefore retarding graphene-related applications. In this work, the growth of high-quality large graphene grains through the nucleation density control in a confined reaction cavity will effectively reduce the perimeter of graphene grain boundaries of graphene films and enhance its physical properties. 

 Figure 1

Figure 1

The height-confined slit positioned in an enclosed graphite cavity is designed for graphene growth. The Cu sublimation is suppressed within the confined slit, therefore reducing the surface roughness of the Cu substrate and graphene nucleation density. The less dendrite-edged graphene single crystals were successfully grown in graphite cavity and height-confined graphite slit as shown in Fig 1 (c) and (d). Besides the control of the growth environment, the oxidised Cu foils are utilised for the fast growth due to the low reaction rate within the confined slit. The surface oxygen not only passivates the Cu active sites to diminish the graphene nucleation density but also lower the surface reaction barrier to accelerate the growth rate. Fig. 2 (d) shows the size of graphene grains is up to millimetre scaled before coalescence.

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