Investigation of the properties of surfaces that affect the slip of liquids at solid interface, with the potential to develop more energy-efficient microfluidic devices.
Overcoming the huge hydrodynamic resistance that slows down liquid flow in confined spaces is a technical and scientific challenge. The recent discovery by Neto of the occurrence of liquid slip at a solid boundary promises to solve this problem, fundamental in many fields, including microfluidics. In order to successfully harness liquid slip, we need to answer the questions: what interfacial properties control liquid slip on solid surfaces, and how?
This project addresses this fundamental problem by identifying the nanoscale interfacial properties that make surfaces slippery. Problems of profound importance in pure and applied surface science will be addressed, and its results will dramatically affect many other research fields, such as microfluidics, confined biological systems, flow through porous rocks, and colloidal stability.
This project relies on the ability to measure directly and with very high resolution interaction forces between surfaces using atomic force microscopy (AFM). Neto’s activity in this field for the past seven years has made her a recognised expert, and the project is already under way and clearly established. We will evaluate the ability of different surface treatments to enhance interfacial slip of liquids. For the preparation of the surfaces we will employ new and versatile treatments that controllably alter the surface roughness, compliance, wettability, and texture. Surfaces will be engineered to mimic real-world examples that present strong drag reduction, such as the skin of aquatic animals.
The aim of the project is to understand how simple liquids can slip on solid surfaces, especially on real-world surfaces, such as rough, patterned, and soft surfaces that surround us; while investigating liquid slip, we will also gain a better understanding of soft surfaces coated with soft grafted polymer layers, and we will develop new methods to prepare slippery superhydrophobic surfaces in situ.
The project primarily involves performing experiments and measuring surface forces with atomic force microscopy (AFM). Several surface characterisation techniques will be employed such as ellipsometry, contact angle goniometry, and grazing angle FTIR. The modification of solid surfaces using advanced surface coatings will be performed both in the lab and through external collaborations. A PhD scholarship might become available for high-calibre students with experience in interfacial physical chemistry.
HDR Inherent Requirements
In addition to the academic requirements set out in the Science Postgraduate Handbook, you may be required to satisfy a number of inherent requirements to complete this degree. Example of inherent requirement may include:
- Confidential disclosure and registration of a disability that may hinder your performance in your degree;
- Confidential disclosure of a pre-existing or current medical condition that may hinder your performance in your degree (e.g. heart disease, pace-maker, significant immune suppression, diabetes, vertigo, etc.);
- Ability to perform independently and/or with minimal supervision;
- Ability to undertake certain physical tasks (e.g. heavy lifting);
- Ability to undertake observatory, sensory and communication tasks;
- Ability to spend time at remote sites (e.g. One Tree Island, Narrabri and Camden);
- Ability to work in confined spaces or at heights;
- Ability to operate heavy machinery (e.g. farming equipment);
- Hold or acquire an Australian driver’s licence;
- Hold a current scuba diving license;
- Hold a current Working with Children Check;
- Meet initial and ongoing immunisation requirements (e.g. Q-Fever, Vaccinia virus, Hepatitis, etc.)
You must consult with your nominated supervisor regarding any identified inherent requirements before completing your application.
The opportunity ID for this research opportunity is 556