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Materials Frontier No.152

Title: Nanostructured oxides for sensor applications

Speaker: Dr. John V Kennedy, Principal Scientist, National Isotope Centre, GNS Science, Wellington,New Zealand

Date/Time: 2014-09-23,14:00—15:00

Venue: Yao Zheng hall(formly 500), Material Building A

Inviter: Prof Deliang ZHANG


Dr. John Kennedy is a Principal Scientist at National Isotope Centre, GNS Science (InstituteofGeologicaland Nuclear Science),New ZealandCrown Research Institute. John has completed Masters in physics at Loyola College, Chennai and Ph.D in physics at Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam in 1999. He continued his research career as a post-doctoral fellow atBelgiumandFrancebefore moving toNew Zealandin 2001. Dr. Kennedy is a Physicist focussed on materials science research and nuclear instrumentation and has pursued wide range of research projects in thin films, nanotechnology, application of ion beam analysis technique for characterising advanced materials, biology, environmental and agricultural samples. He is currently investigating metal and metal oxide nanoparticle growth and their structural, electrical, optical and magnetic properties, metallic nanoclusters, Graphene and multiferroics nanostructures. His team is working on developing a proof-of- concept sensor devices. He has published 150 journal papers and attended more than 35 conferences related to advanced materials.

One dimensional nanostructures are promising candidates with remarkable properties for technological application in nanoscale optoelectronic devices, gas sensors and magnetic field sensor. Recently we have developed new synthesis technique to produce metal oxide nanostructures such as ZnO, WO3, TiO2 and iron oxide for UV, gas sensor and magnetic sensor applications [1-3]. We have also fabricated metallic (Fe, Co, Ni, Sm, Co and FeNi) nanoclusters for high field magnetic sensor applications [4-7]. We have also developed a proof of concept device for those applications in collaboration withNew Zealandindustries. I will present an overview of the results obtained on both metal oxide nanostructuress and metallic nanostructures.

[1]. F. Fang et.al, Nanotechnology 20 (2009) 245502

[2]. J. Kennedy, et.al Zinc oxide nanostructures, PCT WO/2010/120196

[3]. F. Fang et.al, Nanotechnology 22 (2011) 335702.

[4]. J. Kennedy,et.al Nanotechnology 22 (2011) 115602

[5]. J. Leveneur, et.al , Applied Physics Letters 98 (2011) 053111.

[6]. J.Leveneur,et.al Journal of Physical Chemistry C (2011) DOI: 10.1021/jp206357c

[7]. T. Prakash, et.al, Journal of Alloys and Compounds 608 (2014) 153–157

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