报告时间：2017年4月16日（星期日）9：00-11:00

报告地点：格物楼214

报告人：孔令学 教授

工作单位：澳大利亚迪肯大学

举办单位：英国威廉希尔公司

报告人简介：

2011 - present: Professor, Centre for Material and Fibre Innovation, Deakin University

2007 - 2010: Associate Professor, Centre for Material and Fibre Innovation, Deakin University

2006 - 2007: Associate Professor (& adjunct associate professor, 2007-20011), School of Advanced Manufacturing and Mechanical Engineering, University of South Australia, Australia

2002 - 2005: Senior lecturer, Centre for Advanced Manufacturing Research, University of South Australia, Australia

1997 - 2001: Research Fellow, School of Engineering and Technology, Deakin University, Australia

Prof Kong has a broad research interest in micro and nanofabrications and systems. His key interests include: micro and nanosystems using microfluidics and nanofluidics for biomedical and environmental applications; and micro and nano characterization. He attracted more than $5 million funds from National Competitive Grants schemes. He was awarded an early career researcher from ARC and AAS in 2003 and a Roger Pysden Memorial Fellowship from Australian Business Limited in 2002, and an Australia Award - Endeavour Executive Awards in 2010. His innovative PCRDisc device has won a gold medal from ITEX2009, an iENA Special Award for Best Invention and iENA gold medal, and a JIPA Award for the Best Invention in Biotechnology.

报告内容：

A highly stretchable and conductive three-dimensional (3D) micro-wrinkled reduced graphene oxide (MWrGO) film was fabricated using a novel thermo-mechanical shrinking method from elastic rubber materials. This 3D rGO architecture not only increases the specific area for more electrons to pass through but also bestows stretchability to the conductive pathway. The structural change of micro-wrinkles during the deformation had been monitored by an in-situ straining microscopy. The electrical conductivity of the samples remained fairly stable and stayed above 25 S/cm under low deformation (no more than 30 % strain) for up to 500 mechanical stretching-release cycles. The isotropic MWrGO/PDMS composite can be stretched bi-axially. This MWrGO based stretchable composite with stable electrical properties and long life span could form a new platform for stretchable electronics.

The thickness of wrinkled GO films can be precisely controlled ranging from 0.7 to 1.7 μm to provide tailored conductivity. When the wrinkles are well formed, the MWrGO/PDMS composites can maintain the stable electrical conductivity up to 1000 stretching-release cycles under 10 %