Professor Ray Dagastine's research focuses on colloidal and interfacial phenomena as well as developing novel methods to study different aspects of particle technology using techniques including atomic force microscopy or optical microscopy. More information about his group can be found at chemical.eng.unimelb.edu.au/dagastine or about an exciting new microscopy developed from his laboratory at Tiny Bright Things.
Professor Dagastine is the Deputy Head of the Department of Chemical Engineering at the University of Melbourne.
He completed his degree in Chemical Engineering at the University of Delaware and then received his PhD from Carnegie Mellon University. After which, he was awarded a US National Science Foundation International Postdoctoral Research Fellowship hosted by the School of Chemistry at the University of Melbourne. Remaining in Australia, he then joined the Department of Chemical Engineering at the University of Melbourne in 2004. Since then, he has also been an Australian Research Council Future Fellow (2010-14) and a senior technology fellow at the Melbourne Centre for Nanofabrication (2011-15). Prof. Dagastine is also the academic leader of a the Materials Characterisation and Fabrication Platform.
Professor Dagastine has pioneered methods to study the surface forces between soft or deformable colloidal particles, such as drops and bubbles in emulsions and foams. This includes novel experimental methods and theoretical models to monitor the collisions between micro-drops and micro-bubbles in complex fluids. This work has redefined the conceptual models of key physical aspects in the stability, surface forces and coalescence processes between drops and bubbles in soft complex fluids, i.e. emulsions and foams. A number of researchers now uses these methods in fluid mechanics, food science and minerals processing research. In addition, Prof. Dagastine often translates these novel outcomes and methods to practice via sustained industrial collaborations including the personal care product and processed food sectors.
Professor Dagastine has a significant research focus on the diffusion of nano- and micro-particles near surfaces, having developed methods to track particle diffusion and surface forces for anisotropic particles (e.g. nano-rods, plates, disks) as well as spherical particles. One exciting outcome of this work is a new microscopy imaging modality able to measure the size and shape of objects down to the scale of a virus or carbon nanotube using a standard microscope, in-situ, without requiring labels, tagging or stains. You can find out more about this exciting new microscopy modality at Tiny Bright Things.
Professor Dagastine also has research interests in the nano-mechanical behaviour of soft colloidal particles, such as microcapsules and hydrogel particles, developing experimental methods and analysis to quantity nano-scale mechanical and materials properties of these materials, often working in collaboration with other researchers.
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Internal Research Grant
Displaying the 112 most recent scholarly works by Ray Dagastine.
Mass transfer between microbubbles
Yuqi Q Yang, Matthew D Biviano, Jixiang X Guo, Joseph D Berry, Raymond R Dagastine
Journal article | 2020 | Journal of Colloid and Interface Science
Hypothesis The role of interfacial coatings in gas transport dynamics in foam coarsening is often difficult to quantify. The compl..
Effect of Orientation and Wetting Properties on the Behavior of Janus Particles at the Air-Water Interface.
Ellen M Knapp, Raymond R Dagastine, Raymond S Tu, Ilona Kretzschmar
Journal article | 2020 | ACS Applied Materials & Interfaces
The adhesion force and contact angle of gold-capped silica Janus particles and plain silica particles at an air-water interface ar..
Use of microaspiration to study the mechanical properties of polymer gel microparticles
Ankita Gangotra, Matthew Biviano, Raymond R Dagastine, Joseph D Berry, Geoff R Willmott
Journal article | 2019 | Soft Matter
The mechanical properties of polyacrylamide (PA) and polydimethylsiloxane (PDMS) microparticle populations have been measured usin..
Forces between oil drops in polymer-surfactant systems: Linking direct force measurements to microfluidic observations
Emily J Jamieson, Christopher J Fewkes, Joseph D Berry, Raymond R Dagastine
Journal article | 2019 | Journal of Colloid and Interface Science
Hypothesis Linking atomic force microscopy and microfluidics opens up the possibility of probing adhesive interactions between dro..
Determining how polymer-bubble interactions impact algal separation using the novel "Posi"-dissolved air flotation process
Narasinga Rao Hanumanth Rao, Anthony M Granville, Christine I Browne, Raymond R Dagastine, Russell Yap, Bruce Jefferson, Rita K Henderson
Journal article | 2018 | Separation and Purification Technology
Ultrasonically synthesized organic liquid-filled chitosan microcapsules: part 2: characterization using AFM (atomic force microscopy) and combined AFM-confocal laser scanning fluorescence microscopy
Srinivas Mettu, Qianyu Ye, Meifang Zhou, Raymond Dagastine, Muthupandian Ashokkumar
Journal article | 2018 | Soft Matter
Ion tuned water can greatly enhance alteration of carbonate surface to water-wet
H Ding, S Mettu, RR Dagastine, SH Rahman
Conference Proceedings | 2018 | Proceedings of the 6th Unconventional Resources Technology Conference
Copyright 2018, Unconventional Resources Technology Conference (URTeC). In this paper, we aim to investigate the wettability alter..
Insights into Free Volume Variations across Ion-Exchange Membranes upon Mixed Solvents Uptake by Small and Ultrasmall Angle Neutron Scattering
Francois-Marie Allioux, Christopher J Garvey, Christine Rehm, Blaise L Tardy, Raymond Riley Dagastine, Peter D Hodgson, Lingxue Kong, Ludovic Francis Dumee
Journal article | 2017 | ACS Applied Materials & Interfaces
Micromechanical characterization of shales through nanoindentation and energy dispersive x-ray spectrometry
Yuriy B Veytskin, Vamsi K Tammina, Christopher P Bobko, Patrick G Hartley, Michael B Clennell, David N Dewhurst, Raymond R Dagastine
Journal article | 2017 | Geomechanics for Energy and the Environment
Modular assembly of superstructures from polyphenol-functionalized building blocks
Junling Guo, Blaise L Tardy, Andrew J Christofferson, Yunlu Dai, Joseph J Richardson, Wei Zhu, Ming Hu, Yi Ju, Jiwei Cui, Raymond R Dagastine, Irene Yarovsky, Frank Caruso
Journal article | 2016 | NATURE NANOTECHNOLOGY
Ultrasonic synthesis of stable oil filled microcapsules using thiolated chitosan and their characterization by AFM and numerical simulations
Sinuo Tan, Srinivas Mettu, Matthew Dominic Biviano, Meifang Zhou, Bandar Babgi, Jonathan White, Raymond R Dagastine, Muthupandian Ashokkumar
Journal article | 2016 | Soft Matter
Direct AFM force measurements between air bubbles in aqueous polydisperse sodium poly(styrene sulfonate) solutions: Effect of collision speed, polyelectrolyte concentration and molar mass
Christine Browne, Rico F Tabor, Franz Grieser, Raymond R Dagastine
Journal article | 2015 | Journal of Colloid and Interface Science
Microstructure and Composition of Full Fat Cheddar Cheese Made with Ultrafiltered Milk Retentate.
Lydia Ong, Raymond R Dagastine, Sandra E Kentish, Sally L Gras
Journal article | 2013 | Foods
Milk protein is often standardised prior to cheese-making using low concentration factor ultrafiltration retentate (LCUFR) but the..
Combined AFM-confocal microscopy of oil droplet interactions and novel characterization methods of the oil-water interface
RR Dagastine, R Tabor, MH Uddin, H Lockie, SY Tan, R Manica, DYC Chan, F Grieser
Conference Proceedings | 2011 | Engineering Sciences and Fundamentals - Core Programming Topic at the 2011 AIChE Annual Meeting
Silica nano-particle super-hydrophobic surfaces: the effects of surface morphology and trapped air pockets on hydrodynamic drainage forces
Derek YC Chan, Md Hemayet Uddin, Kwun L Cho, Irving I Liaw, Robert N Lamb, Geoffrey W Stevens, Franz Grieser, Raymond R Dagastine
Journal article | 2009 | Faraday Discussions
Divalent cations stabilize the aggregation of sulfated glycoproteins in the adhesive nanofibers of the biofouling diatom Toxarium undulatum
Anthony Chiovitti, Philip Heraud, Tony M Dugdale, Oliver M Hodson, Roger CA Curtain, Raymond R Dagastine, Bayden R Wood, Richard Wetherbee
Journal article | 2008 | Soft Matter
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Honours, Awards and Fellowships
Certificate of Excellence for Most Engaged Research Group
ARC Future Fellowship 2010-2013
Australian Fresh Scientist
International Postdoctoral Research Fellow (2002-04)
Shell Graduate Fellow (1997-2002)
Society for the Advancement of Materials and Process Engineering (SAMPE)
American Chemical Society, Colloids Division
Board Of Directors (2015-2017) And Member
Australasian Colloid and Interface Society
Institution of Chemical Engineers
American Institute of Chemical Engineers
Doctor of Philososphy in Chemical Engineering
Carnegie Mellon University
Bachelor of Chemical Engineering with Distinction
University of Delaware