学 术 报 告
Nanoscale Design of Nano-Carbons for Electronics
Prof. S. Ravi P. Silva
Advanced Technology Institute, University of Surrey
Carbon as a material can have many faces and phases! It can bond to itself and other elements, creating a plethora of material types. The structure, topology, chemical, mechanical and optoelectronic properties, all are dependent on the bonding hybridisation between carbon atoms. This allows for a versatile nano-electronic material that can be designed for applications. The continuous demand for higher performance in electronic devices puts pressure on sustainable development and has driven industry to carefully examine optimum design methodology. Design of materials at the nano-scale allows one to optimise performance and increase efficiency. When the wavelength of interest in the case of solar cells and photonic devices are also in the nano-scale, fundamental improvements can be made to the devices in terms of performance and power usage.
In this study we examine the design of four separate electronic technologies, with a view to optimize its performance beyond traditional limits. Firstly, we examine the design of Photo-Thermal Chemical Vapour Deposited (PT-CVD) carbon nanotubes, on substrates held at low temperature. We show how these CNT structures that do not suffer from electromigration can be the next generation of interconects for all ICs in a CMOS compatible platform. Then we examine the use of hybrid organicinorganic structures for high performance X-ray detectors that can be used to overcome attenuation limits associated with photon scattering via the photoelectric effect to give flexible, broadband high sensitivity detectors. Then, the nanoscale design aspect is used to produce features that can mimic moth eye structures to produce some of the most absorbing materials ever manufactured using thin decoupled layers of graphene. Finally, the use of carbon nanotubes to make devices including the world’s darkest buildings – nanoscale design for macroscopic impact. These have significant potential for opto-electronic devices. wearables and if this can be realised at zero cost to the consumer.
Professor Ravi Silva BA MA PhD FREng CEng CPhys FIET FInstP FRSA is a Surrey Distinguished Professor and the Director of the Advanced Technology Institute (ATI) at the University of Surrey. He heads the Nano-Electronics Centre (NEC). Prof. Silva conducted his studies at Cambridge University. His research has resulted in over 600 presentations at international conferences, and over 580 archival journal papers, with a H-index of 70. He has published in Nature, Science, Nature Materials, Advanced Materials, NanoLetters, Physical Review Letters, Applied Physics Letters among the many journals. He is the inventor of 30 patents and two start-up companies. He is the 2014 winner of the J J Thomson Medal from the IET for contributions to electronics, in 2015 the winner of the Platinum Medal from the IOM3, in 2018 the winner of the James Joule Medal from the Institute of Physics and has won numerous international awards for research. He is a Fellow of the Royal Academy of Engineering and National Academy of Sciences Sri Lanka.