Nano Materials and Devices

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1 Nano Materials and Devices Professor Michael Austin Platform Technologies Research Institute

2 Nano Materials and Devices Program Aim: to develop an integrated capability in nanotechnology Design and modelling of nano materials and nano structures Synthesis of functional materials Fabrication of novel nano-scale devices Focus is on both Discovery type fundamental research and applications in specific niche areas, such as security and water/air purification Platform Technologies Research Institute 2

3 5 Project Areas Self Assembly of Nanostructures Development of Nanostructured Functional Materials Functional Nanomaterials for Air/Water Pollution Control Synthesis and Characterisation of Nanostructured Devices Nanolithography Platform 5 Postdoctoral Research Fellows appointed in 2008 Microelectronics and Materials Technology Centre (MMTC) Rheology and Materials Processing Centre (RMPC) Platform Technologies Research Institute 3

4 Snap shot of research projects Platform Technologies Research Institute 4

5 Self Assembly of Nanostructures Project Aim: create and apply methods to investigate the processes controlling the self assembly and organisation of nanostructures on surfaces Project Leader: A/Prof. Salvy Russo (SAS) Development of suitable computer code to allow atomic modelling of self assembly processes Density Functional Theory, Molecular Dynamics and Kinetic Monte Carlo methods Platform Technologies Research Institute 5

6 Application of Atomic Modelling to Self Assembly Formation of gold nanoclusters and nanorods Predict properties of cluster arrays on surfaces chemical, electronic, optical, stability properties Theoretical support for materials and devices experimental projects Electronic charge iso-surface plot showing surface charge Platform Technologies Research Institute 6

7 Self Assembly of Nanostructures Highlights: self-ordering behaviour of metallic nanoparticles on metal surfaces application of Kinetic Monte-Carlo modelling to the investigation of self assembly on surfaces visualisation and quantification of morphology during the crystallisation and self-ordering of Au nanoparticles simulation of Au depositing and selfassembling on Pt, with colouring of the atoms defined by their packing Platform Technologies Research Institute 7

8 Development of Nanostructured Functional Materials Project Aim: to produce novel nanostructured materials having unique or enhanced properties Project Leader: Prof. Sati Bhattacharya (SCECE) Nanopigments colourants for plastics, textiles, inks, paints enhanced security features for banknotes, passports, credit cards Platform Technologies Research Institute 8

9 Clay-Based Nanopigments Hybrid clay-dye nanocomposites improved UV-stability (ideal for outdoor applications) enhanced thermal stability (improved processability) 1 Rhodamine / PP 2 Nanopigment / PP Rhodamine based hybrid nanopigment RNP UV-Exposed unexposed Platform Technologies Research Institute 9

10 Polymeric Nanopigments (PNPs) Dye is fixed in a polymeric (cross-linked) matrix 100% organic nanopigments non-leaching (increased lifetime, protection for the environment) nano-scale particle size with small and controllable size distribution enhanced colour fastness and UV stability Fluorescent nanopigment: PNP98 signed licensing agreement for commercialisation provisional patent lodged Platform Technologies Research Institute 10

11 Nanopigments Future applications possibility of fixing stimuli-responsive molecules in desired matrices and particles, improving their stability against UV- or thermooxidative degradation use of nanostructured polymers for realisation of photonic devices such as polymer lasers and photonic based sensors An International Symposium on Polymeric Nanostructured Materials was organised by RMIT s Rheology and Materials Processing Centre (RMPC) and run in Melbourne, June 1-3, invited speakers from PTRI Platform Technologies Research Institute 11

12 Synthesis and Characterisation of Nanostructured Devices Project Aim: to develop new types of nanostructured coatings with useful properties for use in devices Project Leader: Prof. Dougal McCulloch (SAS) Cathodic Arc Plasma Deposition of coatings control of deposition conditions to create desired surface structure self assembly on surfaces Plasma Coating Substrate Platform Technologies Research Institute 12

13 Graphene Based Nanostructures Synthesis of graphene based nanostructures to control heat flow and electrical current heat extraction is a major problem in semiconductor devices graphene sheets are the best thermal conductor known have developed ability to grow fully oriented graphene sheets at RT potential to combine electrical and thermal functions Concept for an electrical interconnect between Si and a metallization layer made using oriented graphene. Platform Technologies Research Institute 13

14 Synthesis of Metal Oxides Synthesis, characterisation and electrical testing of nanostructured metal oxides SnO2, HfO, ZnO new types of nanostructured coatings for gas sensors SU8 Substrate 400nm Gas sensor based on nanostructured SnO2 films Platform Technologies Research Institute 14

15 Functional Nanomaterials for Pollution Control Project Aim: to develop functional nanomaterials for pollution control, catalysis and sensing applications Project Leader: Prof. Suresh Bhargava (SAS) Porous nanomaterials removal of toxic gases & wastes from industrial gas and water streams Metallic/bimetallic nanostructures electrocatalysis and sensing applications Nanostructured WO 3 Platform Technologies Research Institute 15

16 Functional Nanomaterials Mercury sensing and removal Shape controlled synthesis of metallic/bimetallic nanostructures Electrocatalytic activity of metallic/bimetallic nanostructures hydrogen production, glucose detection and methanol oxidation Development of substrates for Surface Enhanced Raman Spectroscopy (SERS) Platform Technologies Research Institute 16

17 Nano-catalysts Influence of residual silver on the hydrogen production properties of Ag/Pt nano-catalysts 20 nm 20 nm 20 nm 20 nm 20 nm Increasing Pt content from A to E Galvanic replacement generates open hollow Ag/Pt nanocatalysts Ag removal increases electrocatalytic activity and H 2 production Electrochem. Comm., 2009, DOI: /j.elecom Platform Technologies Research Institute 17

18 Nanolithography Platform Project Aim: to develop a nanolithography platform to realise a range of novel devices with nanoscale features - integrated optics, nano-electronics, sensors, biotechnology Project Leader: A/Prof. Arnan Mitchell (SECE) Electron-beam lithography use of SEM facility to generate e-beam written patterns Nano-imprint lithography can replicate nanoscale features over wafer scale area at low cost 1µm dots, 1µm space Platform Technologies Research Institute 18

19 Nano-Imprint Lithography Replication of nanoscale features biological templates surface enhanced Raman probes G. Kostovski et al., Nanoimprinted optical fibres: Biotemplated nanostructures for SERS, Biosensors and Bioelectronics, 24(5), , Platform Technologies Research Institute 19

20 Parallel Imprinting Self-aligned fibre arrays for parallel imprinting (40 fibres) portable array imprinting with high throughput NHMRC Development Grant Assembled portable imprinter Self-aligned fibres Platform Technologies Research Institute 20

21 Other Fabrication Platforms Microfluidics Micro/nano contact printing Nano-structured polymers and oxides Nano-scale ferroelectrics Platform Technologies Research Institute 21

22 Summary Dynamic Research Program 35 journal publications in A, A * journals, including a Nature Medicine paper Strong Industry Collaboration CSIRO Energy Technology, Alcoa, BHP Billiton, NanoVentures Australia, Sutton Tools, BAE Systems Enhanced interaction between research groups across Schools Platform Technologies Research Institute 22

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