Day 2 :
CSIRO Manufacturing, Australia
Time : 10:15-11:00
Dr. Zhao Jun Han is the Senior Research Scientist at CSIRO. He was Research Scientist (2012-2015) and the Office of Chief Executive Postdoctoral Fellow (2009-2012). He graduated from Nanyang Technological University, Singapore, with both B.Eng and Ph.D degrees in Electrical and Electronic Engineering. He is the recipient of CSIRO’s Julius Career Award (2014), Australian Research Council’s DECRA fellowship (2013), and the Institute of Engineering Singapore Award (2007). His research topics include the synthesis and application of carbon nanomaterials, energy storage devices, water purification, and biomedical engineering.
Transition metal oxides such as MnO2 and RuO2 are promising materials for achieving both high power and energy densities in energy storage devices. However, it remains a great challenge to develop these metal oxides-based high-performance electrodes due to their low electrical conductance and poor stability. At CSIRO we have studied a number of metal oxides such as mixed-valent MnO2 nanoparticles, MnO2 nanowires, and RuO2 nanofilms, and combined them with carbon-based nanostructures including graphite films and graphene, to fabricate nanohybrids in synergistic integration. We demonstrated controlled size, density, composition and morphology of the metal oxides, and developed several approaches such as plasma and electrochemical surface treatments to effectively improve the interfacial adhesion between metal oxides and carbon supports. The nanohybrids show both high specific capacitance and superior stability, which may open up new opportunities in areas such as lithium ion batteries, supercapacitors, catalysts, photosynthesis, and electrochemical sensors.
Principal Scientist of IPCP and Professor of Chemical Physics in MUPT. Russia
Time : 9:30-10:15
Eugene B. Gordon has completed his PhD in 1970 from Moscow University for Physics and Technology (MUPT) and Doctor of Science degree in 1981 from Institute of Problems of Chemical Physics (IPCP), Russian Academy of Sciences. Now he is the Principal Scientist of IPCP and Professor of Chemical Physics in MUPT. He has published more than 160 papers in reputed journals and he is the member of All-Russia Supreme Qualification Committee, the member of Dissertation Councils in the IPCP and in Joint Institute of High Temperatures
The quasi-1D quantized vortices appeared in superfluid helium (He II) represent an ideal template for growing the nanowire from any metal embedded to He II. Using the laser ablation for the metal introduction into He II we have grown at T = 1.5 - 2.0 K the nanowires made of many metals and alloys. Their diameters D dependent on the metal thermodynamic properties ranged from 8 nm for fusible metals to 2 nm for refractory ones, and the structure and shape of nanowires were quite perfect. Generally, the product of our synthesis represents a 3D web of nanowires interconnected by metallic manner. The total area of web grown in one experiment is up to 10 cm2.
Nanowires with thickness of few nanometers are of interest for many applications. In particular they appear to be excellent nanocatalysts: the efficiencies of nanowebs made of gold, palladium, platinum and niobium as the catalysts for CO oxidation were found to be higher than those for the nanoparticles immobilized on alumina. Niobium nanowires demonstrated the size suppression of superconductivity by the mechanism of quantum phase slip; thus they can be used for the qubits and pointed SQUID creation. For alloys the different metals separation along the wire core led to formation of nano-heterostructures with unique properties.
The thin (D <4 nm) nanowires possess unexpectedly low thermal stability: they decay to the chains of separate nanoclusters at temperatures 3 times lower than the melting temperature. The ways to overcome this defect have been outlined.