Professor John Thomas

Professor Thomas is Professor of Applied Physics and Discipline Leader.

He is Leader of the Laser Light Scattering and Materials Science Group.

Laser Light Scattering and Materials Science Group

Fellow Australian Institute of Physics (FAIP)

Member American Physical Society (MAPS)

Member Institute of Electrical and Electronic Engineers (MIEEE)

Member Australian Microscopy and Microanalysis Society

BSc(Hons), Physics, University of Newcastle, 1975

PhD, Macquarie University, 1979

• Colloid & Materials Science: Particle size measurement, electrokinetic behaviour, dense colloidal dispersions, light scattering techniques, atomic force microscopy.
• Electronics & Instrumentation: High speed digital correlators, laser electro-optic instrumentaion (especially for materials applications).
• Light Scattering & Propagation: Propagation in atmosphere & ocean waters, remote sensing.

52. Nicoud, F., Castellazzi, G., Lesniewski, P.J., Thomas, J.C., “Velocity determination of nerve tissue from ultrasound video images”, Proc. of the 18th National Congress of the Australian Inst. of Physics, Adelaide 30 Nov.-5 Dec. 2008, Australian Institute of Physics, 73-76 (2008).

51. Lesniewski, P.J., Thomas, J.C., “Modelling of particle dynamics in strong ultrasonic fields in fluids”, Proc. of the 18th National Congress of the Australian Inst. of Physics, Adelaide 30 Nov.-5 Dec. 2008, Australian Institute of Physics, 21-24 (2008).

50. Aziz, S.M., Khambatta, T., Thomas, J.C., “Near Infrared Spectroscopic Techniques to Monitor Bone Tissue Oxygenation”, Proc. of the 18th National Congress of the Australian Inst. of Physics, Adelaide 30 Nov.-5 Dec. 2008, Australian Institute of Physics, 61-64 (2008).

49. Thomas, J.C., Hanton, K.L., & Crosby, B.J., “Measurement of the Field Dependent Electrophoretic Mobility of Surface Modified Silica/AOT Suspensions”, Langmuir, 24(19) 10698-10701 (2008). http://pubs.acs.org/cgi-bin/abstract.cgi/langd5/2008/24/i19/abs/la800821e.html

48. Reinboth, B., Thomas, J.C., Hanssen, E., & Gibson, M.A. "Beta ig-h3 Interacts Directly with Biglycan and Decorin, Promotes Collagen VI Aggregation, and Participates in Ternary Complexing with these Macromolecules", Journal of Biological Chemistry, 281(12) 7816-7824 (2006).

47. Li, H., Addai-Mensah, J., Thomas, J.C., & Gerson, A.R. “The Crystallization Mechanism of Al(OH)3 from Sodium Aluminate Solutions”, Journal of Crystal Growth, 279 508-520 (2005).

46. Li, H., Addai-Mensah, J., Thomas, J.C., & Gerson, A.R. “The Influence of Al(III) Supersaturation and NaOH Concentration on the Rate of Crystallization of Al(OH)3 Precursor Particles from Sodium Aluminate Solutions”, Journal of Colloid and Interface Science, 286 511-519 (2005).

45. Li, H., Addai-Mensah, J., Thomas, J.C., & Gerson, A.R. "A Study of Colloidal Al(III)-Containing Species in Fresh/Caustic Aluminate Solutions", Colloids & Surfaces A: Physicochem. Eng. Aspects, 223 83-94 (2003).

44. Li, H., Addai-Mensah, J., Thomas, J.C., & Gerson, A.R. “Crystallisation Rate Behaviour of Aluminium Hydroxide as a Function of Solution Concentrations”, in “Light Metals 2003”, pp65-71, Crepeau, P.N. ed., Proceedings of Technical Sessions presented by the TMS Aluminum Committee at the 132nd TMS Annual Meeting, San Diego, CA, March 2-6, 2003.

43. Thomas, J.C., Crosby, B.J., Keir, R.I., Hanton, K. "Observation of a Field-Dependent Electrophoretic Mobility with Phase Analysis Light Scattering (PALS)", Langmuir, 18 4243-4247 (2002).

42. Keir, R.I., Suparno, Thomas, J.C. "Charging Behaviour in the Silica/Aerosol OT/Decane System", Langmuir, 18, 1463-1465 (2002).

41. Keir,R.I., Quinn, A., Jenkins, P., Thomas, J.C., Ralston, J., & Ivanova, O. "Electrokinetic properties of copper pthalocyanine pigment dispersions.", Journal of Imaging Science and Technology, 44(6),528-533(2000).

40. Brennan, M., Kouzoubov, A., Nolan, A., Thomas, J. & Abbot, R. "Improved Depth Determination for the LADS System: A Way Forward," DSTO Aeronautical and Maritime Research Laboratory (under review).

39. Kouzoubov, A., Brennan, M.J., Thomas, J.C., & Abbot, R.H. "Monte Carlo Simulations of the Influence of Particle Non-Sphericity on Remote Sensing of Ocean Water.", Journal of Geophysical Research, 104(D24), 31731-31737(1999).

38. Jenkins, P., Ralston, J.A., Thomas, J.C., Nicholls, S.L., & Staples, P.E. "Copper Phthalocyanine-Mica Interactions in Nonaqueous Media.", Journal of Colloid & Interface Science, 211, 11-17(1999).

37. Harris, D., Prestidge, C.A., Keir, R.I, & Thomas, J.C. "A dynamic light scattering investigation of nucleation and growth in supersaturated alkaline sodium aluminate solutions", Colloids and Surfaces, 154, 343-352(1999).

36. Jenkins, P., Basu, S., Keir, R.I., Ralston, J., Thomas, J.C. & Wolffenbuttel, B.A.M. "The electrochemistry of nonaqueous copper pthalocyanine dispersions in the presence of a metal soap surfactant. A simple equilibrium site binding model.", Journal of Colloid and Interface Science, 211, 252-263(1999).

35. Bryant, G.J., Schotman, H., & Thomas, J.C. "The estimation of multiple scattering in turbid colloidal suspensions using a 2-fibre detector", Particle and Particle Systems Characterisation, 15, 170-173(1998).

34. Kouzoubov, A., Brennan, M.J., & Thomas, J.C. "Treatment of polarization in laser remote sensing of ocean water", Applied Optics, 37(6), 3873-3885 (1998).

33. Watson, J.N., Iton, L.E., Keir, R. I., Thomas, J.C., Dowling, T.L., & White, J.W. "TPA-Silicalite Crystallization from Homogeneous Solution: Kinetics and Mechanisim of Nucleation and Growth", Journal of Physical Chemistry B, 101(48), 10094-10104 (1997).

32. Bryant, G.J., Abeynayake, C., & Thomas, J.C. "Improved Particle Size Distribution Measurements Using Multiangle Dynamic Light Scattering. 2. Refinements and Applications", Langmuir, 12(26), 6224-6228 (1996).

31. Wedd, A.M., Thomas, J.C. & Hermann, J.A., "The effect of laser fluctuation statistics upon detection probability", Optics and Laser Technology, 28(8), 597-601 (1996).

30. Mudge, D., Wedd, A.M., Craig, J., & Thomas, J.C. "Statistical Measurements of Irradiance Fluctuations Produced by a Reflective Membrane Optical Scintillator", Optics and Laser Technology, 28(5), 381-387 (1996).

29. Bryant, G.J. & Thomas, J.C. "Improved Particle Size Distribution Measurements Using Multiangle Dynamic Light Scattering", Langmuir, 11(7), 2480-2485 (1995).

28. Suparno, Deurloo, K., Stamatelopolous, P., Srivastva, R., & Thomas, J.C. " Light scattering with single mode fiber collimators", Appl. Optics, 33(30), 7200-7205 (1994).

27. Middelberg, A.P.J., Thomas, J.C., & Collis, M.A. "Photosedimentation: A Technique for High-Resolution Particle Size Analysis", Chem. Eng. In Aust. CHE 18(2), 18-21(1993).

26. Thomas, J.C. "High Resolution Particle Size Analysis in Coating Materials. II. Achieving Accurate and High Resolution Results" in "Surface Phenomena and Additives in Water-Based Coatings and Printing Technology", Sharma, M.K. and Berger, P.D. eds, Plenum, NY, pp. 191-203 (1991).

25. Thomas, J.C. "Fiber Optic Dynamic Light Scattering from Concentrated Dispersions. 4: Potential for On-Line Particle Size Measurement" in "Particle Size Assessment and Characterization", Provder, T. ed., ACS Symposium Series 472, American Chemical Society, Washington DC, pp. 98-105 (1991).

24. Thomas, J.C. "Photon Correlation Spectroscopy: Technique and Instrumentation" in "Photon Correlation Spectroscopy: Multi-component Systems", Schmitz, K.S. ed., SPIE Publications, Vol. 1430, Bellingham, pp. 2-18 (1991).

23. Thomas, J.C., Middelberg, A.P.J., Hamel, J-F. & Snoswell, M.A. "High Resolution Particle Size Analysis in Biotechnology Process Control", Biotechnology Progress 7, 377-379 (1991).

22. Thomas, J.C. & Fairhurst, D. "High Resolution Particle Size Analysis of Coating Materials" in Surface Phenomena and Fine Particles in Water-Based Coatings and Printing Technology, Sharma, M.K. & Micale, F.J. eds., Plenum, NY, pp. 213-224 (1991).

21. Song, L., Fujimoto, B.S., Wu, P., Thomas, J.C., Shibata, J.H. & Schurr, J.M. "Evidence for Allosteric Transitions in Secondary Structure Induced by Superhelical Stress", Journal of Molecular Biology 214, 307-326 (1990).

20. Thomas, J.C. & Dimonie, V. "Fiber Optic Dynamic Light Scattering (FODLS) from Concentrated Dispersions. 3. Particle Sizing in Concentrates", Applied Optics, 29(36), 5332-5335 (1990).

19. Thomas, J.C. "Fiber Optic Dynamic Light Scattering (FODLS) from Concentrated Dispersions. 2. Concentration Dependence of the Apparent Diffusion Coefficient for Small Spheres", Langmuir, 5, 1350-1355 (1989).

18. Tscharnuter, W.W., Weiner, B.B., Fairhurst, D. & Thomas, J.C. “Extinction coefficients. The forgotten problem in submicron particle size analysis”, Proceedings of the ACS Division of Polymeric Materials Science and Engineering 61, 144 (1989).

17. Thomas, J.C., & Tjin, S.C. "Fiber Optical Dynamic Light Scattering (FODLS) from Moderately Concentrated Dispersions", Journal of Colloid and Interface Science, 129, 15-31 (1989).

16. Tscharnuter, W.W., Weiner, B.B., & Thomas, J.C., “Advanced instrumentation for QELS experiments”, NASA Laser Light Scattering Advanced Technology Development Workshop, p135-139 (1988).

15. Thomas, J.C., "The Determination of Log Normal Particle Size Distributions by Dynamic Light Scattering", Journal of Colloid and Interface Science, 117, 187-192 (1987).

14. Thomas, J.C., Schurr, J.M. & Hare, D.R. "Rotational Dynamics of Transfer RNA: The Effect of Ionic Strength and Concentration", Biochemistry, 23, 5407-5413 (1984).

13. Thomas, J.C., Schurr, J.M., Reid, B.R., Ribeiro, N.S. & Hare, D.R. "The Effect of Mg2+ on the Solution Conformation of Two Different tRNAs", Biochemistry, 23, 5414-5520 (1984).

12. Bogar, R.G., Callis, J.B. & Thomas, J.C. "Translational Diffusion of Solutes on C18 Bonded Reverse Phase Liquid Chromatography Packings", Analytical Chemistry, 56, 1080-1084 (1984).

11. Thomas, J.C. & Schurr, J.M. "Fluorescence Depolarization and the Temperature Dependence of the Torsion Elastic Constant of Linear phi29 DNA", Biochemistry, 22, 6194-6198 (1983).

10. Thomas, J.C., Lum, Y.T. & Kennett, D. "A Low-Cost Microprocessor-Based Digital Autocorrelator", Rev. Sci. Instrum., 54, 1346-1355 (1983).

9. Wilcoxon, J., Shibata, J.H., Thomas, J.C. & Schurr, J.M. (1982) "Optical Probes of Internal Motions in DNA" in Biomedical Applications of Laser Light Scattering, Sattelle, D.B., Lee, W.I., and Ware, B.R. eds., Elsevier Biomedical Press (1982).

8. Selensky, R., Holten, D., Windsor, M.W., Paine, J.B. III, Dolphin, D., Gouterman, M. & Thomas, J.C. "Excitonic Interactions in Covalently-Linked Porphyrin Dimers", Chemical Physics, 60, 33-46 (1981).

7. Lin, S.C., Thomas, J.C., Allison, S.A. & Schurr, J.M. "Dynamic Light Scattering Studies of Internal Motions in DNA. III. Evidence for Titratable Joints Associated with Bound Poly-cations", Biopolymers, 20, 209-230 (1981).

6. Thomas, J.C., Allison, S.A., Appellof, C.J. & Schurr, J.M. "Torsion Dynamics and Depolarization of Fluorescence of Linear Macromolecules. II. Fluorescence Polarization Anisotropy Measurements on a Clean Viral phi29 DNA", Biophysical Chemistry, 12, 177-188 (1980).

5. Thomas, J.C., Holder, R.D., Allison, S.A. & Schurr, J.M. "Dynamic Light Scattering Studies of Internal Motions in DNA. II. Clean Viral DNAs", Biopolymers, 19, 1451-1474 1980).

4. Thomas, J.C. & Schurr, J.M. "Dynamic Light Scattering Studies of DNA. II. Effect of Ionic Strength on the Structure and Internal Dynamics of Viral phi29 DNA", Biopolymers, 19, 215- 218 (1980).

3. Thomas, J.C. & Schurr, J.M. "Photon Correlation Spectroscopy in the Near Ultraviolet", Optics Letters, 4, 222-223 (1979).

2. Thomas, J.C. & Fletcher, G.C. "Dynamic Light Scattering from Collagen Solutions. II. Photon Correlation Study of the Depolarized Light", Biopolymers, 18, 1333-1352 (1979).

1. Thomas, J.C. & Fletcher, G.C. "Rotational Decay Constant of Tobacco Mosaic Virus by Depolarized Photon Correlation Spectroscopy", Biopolymers, 17, 2753-2756 (1978).