Design and Implementation of Tools for STM Studies in UHV and at the Solid-Liquid Interface

This thesis presents details of the design and development of novel tools and instruments for scanning tunneling microscopy (STM), and may be considered as a repository for several years' worth of development work. The author presents design goals and implementations for two microscopes. First, a novel Pan-type STM was built that could be operated in an ambient environment as a liquid-phase STM. Unique features of this microscope include a unibody frame, for increased microscope rigidity, a novel slider component with large Z-range, a unique wiring scheme and damping mechanism, and a removable liquid cell. The microscope exhibits a high level of mechanical isolation at the tunnel junction, and operates excellently as an ambient tool. Experiments in liquid are on-going. Simultaneously, the author worked on designs for a novel low temperature, ultra-high vacuum (LT-UHV) instrument, and these are presented as well. A novel stick-slip vertical coarse approach motor was designed and built. To gauge the performance of the motor, an in situ motion sensing apparatus was implemented, which could measure the step size of the motor to high precision. A new driving circuit for stick-slip inertial motors is also presented, that o ffers improved performance over our previous driving circuit, at a fraction of the cost. The circuit was shown to increase step size performance by 25%. Finally, a horizontal sample stage was implemented in this microscope. The build of this UHV instrument is currently being fi nalized. In conjunction with the above design projects, the author was involved in a collaborative project characterizing N-heterocyclic carbene (NHC) self-assembled monolayers (SAMs) on Au(111) films. STM was used to characterize Au substrate quality, for both commercial substrates and those manufactured via a unique atomic layer deposition (ALD) process by collaborators. Ambient and UHV STM was then also used to characterize the NHC/Au(111) films themselves, and several key properties of these films are discussed. During this study, the author discovered an unexpected surface contaminant, and details of this are also presented. Finally, two models are presented for the nature of the NHC-Au(111) surface interaction based on the observed film properties, and some preliminary theoretical work by collaborators is presented.

Building a local design and entrepreneurship ecosystem

Design and creativity are becoming greatly sought out skills in leading industries around the world, big businesses are developing the “Chief Design Officer” to engage with strategic and company shaping discussions. Design as an economic driver is now abundantly clear with companies such as Nike and Apple leading this way of thinking, but how do we as Australian industry capture this and how do we instil “creativity” into our secondary school and university level education to drive the next level of innovation and development. The local region where Deakin University is situated has undergone significant changes in the last 10 years, what was once an economy dominated by oil, automotive and metal production industries has been wound down to a local economy dominated by health, services and education. However, manufacturing and design being the front end of manufacturing is still a key economic driver this study is looking at the embryonic initiatives undertaken to build an ecosystem of design and entrepreneurship in a regional area. Several aspects will be looked at, high school and university student engagement in the process, established SME's and start-up culture. With the establishment of an ecosystem it is believed that success will breed success. With student engagement showing that being creative and playing can yield tangible results, it also gets students comfortable with the element of risk. The efforts of Deakin University is about providing the framework and scaffolding for students to pursue a start-up idea and test it validity. The final part of the ecosystem is for SME's and recent start-ups to share their success stories and acting as mentors as future start-ups emerge. By creating an ecosystem that is driven by design, manufacturing and entrepreneurship key economic outcomes will be generated; a regional area will be more resilient to economic uncertainty and ultimately a cohort of innovative thinkers that will generate value for their community.

Guidelines on building design and operation to minimize air quality impacts from major roads in transit oriented development

Poor air quality has a huge detrimental effect, both economic and on the quality of life, in Australia. Transit oriented design (TOD), which aims to minimise urban sprawl and lower dependency on vehicles, leads to an increasing number of buildings close to transport corridors. This project aims at providing guidelines that are appropriate to include within City Plan to inform future planning along road corridors, and provide recommendations on when mitigation measures should be utilised.