Associate Professor Asaph Widmer-Cooper
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Associate Professor Asaph Widmer-Cooper

BSc(Adv) PhD Sydney
Phone
61 2 9114 1141
Fax
61 2 9351 3329
Address
F11 - Chemistry Building
The University of Sydney
Associate Professor Asaph Widmer-Cooper

Asaph Widmer-Cooper is an Associate Professor in the School of Chemistry and a member of The University of Sydney Nano Institute. Prior to this he held ARC Future and Postdoctoral Fellowships at the University of Sydney, was a Visiting Scientist at the ETH Zurich, and a Postdoctoral Fellow at UC Berkeley and Lawrence Berkeley National Laboratory.

I am a theoretician working at the interface of chemistry, physics and materials science, with more than 20 years of experience solving problems related to colloids and interfaces, soft and self-assembled materials, and nanomaterials.

My current research is focused on understanding how solution-processed nanomaterials form and behave, especially ones important for the sustainable capture and transformation of energy.

Problems I am working on include:

  • How molecular ligands can be used to control the stability and shape of nanoparticles in solution
  • How nanoparticles can be made to assemble into ordered structures with useful optoelectronic properties
  • How the formation and stability of printable inorganic semiconductors can be optimised for use in next-generation solar cells

This involves using mathematical models and computational methods to understand how order spontaneously arises, or is degraded, in collections of atoms, molecules and nanoparticles held together by relatively weak forces.

To inspire our work and to stimulate new discoveries, we often work closely with experimental groups from across the globe.

Project titleResearch student
The Effects of Ligand Structure and Composition on the Colloidal Stability of NanoparticlesSetare DODANGE
Simulation Insights into the Mechanism of Formation of Metal Halide Perovskites from SolutionIka FITRIANI
Understanding Ligand-Induced Chirality Transfer in Metal Halide PerovskitesBilal KHAN

Publications

Journals

  • Bassani, C., Gang, O., Gaston, N., Golestanian, R., Guerrero-Garcia, G., Gruenwald, M., Haji-Akbari, A., Ibáñez, M., Karg, M., Kraus, T., Widmer-Cooper, A., et al (2024). Nanocrystal Assemblies: Current Advances and Open Problems. ACS Nano, 18(23), 14791-14840. [More Information]
  • Widmer-Cooper, A., Rathnayake, P., Gallant, B., Holzhey, P., Shen, X., Smith, J., Elmestekawy, K., et al (2023). Chloride-Based Additive Engineering for Efficient and Stable Wide-Bandgap Perovskite Solar Cells. Advanced Materials, 35(30). [More Information]
  • Zhang, H., Liu, Y., Dong, Y., Ashokan, A., Widmer-Cooper, A., Köhler, J., Mulvaney, P. (2023). Electrophoretic Deposition of Single Nanoparticles. Langmuir. [More Information]

Conferences

  • Widmer-Cooper, A., Harrowell, P. (2004). How Reproducible Is The Structure Of Dynamic Heterogeneity In Glass Forming Liquids? Slow Dynamics in Complex Systems, New York: American Institute of Physics.

2024

  • Bassani, C., Gang, O., Gaston, N., Golestanian, R., Guerrero-Garcia, G., Gruenwald, M., Haji-Akbari, A., Ibáñez, M., Karg, M., Kraus, T., Widmer-Cooper, A., et al (2024). Nanocrystal Assemblies: Current Advances and Open Problems. ACS Nano, 18(23), 14791-14840. [More Information]

2023

  • Widmer-Cooper, A., Rathnayake, P., Gallant, B., Holzhey, P., Shen, X., Smith, J., Elmestekawy, K., et al (2023). Chloride-Based Additive Engineering for Efficient and Stable Wide-Bandgap Perovskite Solar Cells. Advanced Materials, 35(30). [More Information]
  • Zhang, H., Liu, Y., Dong, Y., Ashokan, A., Widmer-Cooper, A., Köhler, J., Mulvaney, P. (2023). Electrophoretic Deposition of Single Nanoparticles. Langmuir. [More Information]
  • Widmer-Cooper, A., Dal Compare, L., Romano, F., et al (2023). Janus helices: From fully attractive to hard helices. Journal of Chemical Physics, 159(17). [More Information]

2022

  • Zhang, H., Liu, Y., Ashokan, A., Gao, C., Dong, Y., Kinnear, C., Kirkwood, N., Zaman, S., Maasoumi, F., James, T., Widmer-Cooper, A., et al (2022). A General Method for Direct Assembly of Single Nanocrystals. Advanced Optical Materials, 10(14). [More Information]
  • Bo, A., Liu, Y., Kuttich, B., Kraus, T., Widmer-Cooper, A., de Jong, N. (2022). Nanoscale Faceting and Ligand Shell Structure Dominate the Self-Assembly of Non-Polar Nanoparticles into Superlattices. Advanced Materials, , 2109093. [More Information]
  • Lin, Q., Bernardi, S., Shabbir, B., Ou, Q., Wang, M., Yin, W., Liu, S., Chesman, A., Fürer, S., Si, G., Widmer-Cooper, A., et al (2022). Phase-Control of Single-Crystalline Inorganic Halide Perovskites via Molecular Coordination Engineering. Advanced Functional Materials, 32(16), 2109442-1-2109442-10. [More Information]

2021

  • Liu, Y., Widmer-Cooper, A. (2021). A dissipative particle dynamics model for studying dynamic phenomena in colloidal rod suspensions. Journal of Chemical Physics, 154(10), 1-11. [More Information]
  • Wood, J., Liu, Y., Widmer-Cooper, A. (2021). Crystal nucleation in colloidal rod suspensions: The effect of depletant size. Journal of Chemical Physics, 154(24), 244505. [More Information]
  • Zhang, H., Liu, Y., Shahidan, M., Kinnear, C., Maasoumi, F., Cadusch, J., Akinoglu, E., James, T., Widmer-Cooper, A., Roberts, A., et al (2021). Direct Assembly of Vertically Oriented, Gold Nanorod Arrays. Advanced Functional Materials, 31(6), 2006753. [More Information]

2020

  • Rathnayake, P., Bernardi, S., Widmer-Cooper, A. (2020). Evaluation of the AMOEBA force field for simulating metal halide perovskites in the solid state and in solution. Journal of Chemical Physics, 152(2), 24117. [More Information]
  • Sabatini, R., Liao, C., Bernardi, S., Mao, W., Rahme, M., Widmer-Cooper, A., Bach, U., Huang, S., Ho-Baillie, A., Lakhwani, G. (2020). Solution-Processed Faraday Rotators Using Single Crystal Lead Halide Perovskites. Advanced Science, 7(7), 1902950. [More Information]
  • Liu, Y., Bernardi, S., Widmer-Cooper, A. (2020). Stability of pinned surface nanobubbles against expansion: Insights from theory and simulation. Journal of Chemical Physics, 153(2), 024704. [More Information]

2019

  • Liu, Y., Widmer-Cooper, A. (2019). A versatile simulation method for studying phase behavior and dynamics in colloidal rod and rod-polymer suspensions. Journal of Chemical Physics, 150(24), 1-8. [More Information]
  • Lloyd, J., Liu, Y., Ng, S., Thai, T., Gomez, D., Widmer-Cooper, A., Bach, U. (2019). Self-assembly of spherical and rod-shaped nanoparticles with full positional control. Nanoscale, 11(47), 22841-22848. [More Information]

2018

  • Chiu, M., Wood, J., Widmer-Cooper, A., Neto, C. (2018). Aligned droplet patterns by dewetting of polymer bilayers. Macromolecules, 51(15), 5485-5493. [More Information]
  • Monego, D., Kister, T., Kirkwood, N., Mulvaney, P., Widmer-Cooper, A., Kraus, T. (2018). Colloidal stability of apolar nanoparticles: Role of ligand length. Langmuir, 34(43), 12982-12989. [More Information]
  • Kister, T., Monego, D., Mulvaney, P., Widmer-Cooper, A., Kraus, T. (2018). Colloidal Stability of Apolar Nanoparticles: The Role of Particle Size and Ligand Shell Structure. ACS Nano, 12(6), 5969-5977. [More Information]

2016

  • Widmer-Cooper, A., Geissler, P. (2016). Ligand-Mediated Interactions between Nanoscale Surfaces Depend Sensitively and Nonlinearly on Temperature, Facet Dimensions, and Ligand Coverage. ACS Nano, 10(2), 1877-1887. [More Information]

2014

  • Tondl, E., Ramsay, M., Harrowell, P., Widmer-Cooper, A. (2014). Defect-mediated relaxation in the random tiling phase of a binary mixture: Birth, death and mobility of an atomic zipper. Journal of Chemical Physics, 140(10), 1-8. [More Information]
  • Widmer-Cooper, A., Geissler, P. (2014). Orientational Ordering of Passivating Ligands on CdS Nanorods in Solution Generates Strong Rod-Rod Interactions. Nano Letters, 14(1), 57-65. [More Information]
  • Mosayebi, M., Ilg, P., Widmer-Cooper, A., Del Gado, E. (2014). Soft modes and nonaffine rearrangements in the inherent structures of supercooled liquids. Physical Review Letters, 112(10), 1-5. [More Information]

2013

  • Colombo, J., Widmer-Cooper, A., Del Gado, E. (2013). Microscopic picture of cooperative processes in restructuring gel networks. Physical Review Letters, 110(19), 1-5. [More Information]
  • Lenzen, M., Dey, C., Foran, B., Widmer-Cooper, A., Ohlemüller, R., Williams, M., Wiedmann, T. (2013). Modelling interactions between economic activity, greenhouse gas emissions, biodiversity and agricultural production. Environmental Modeling and Assessment, 18(4), 377-416. [More Information]

2012

  • Henzie, J., Grunwald, M., Widmer-Cooper, A., Geissler, P., Yang, P. (2012). Self-assembly of uniform polyhedral silver nanocrystals into densest packings and exotic superlattices. Nature Materials, 11(2), 131-137. [More Information]

2011

  • Widmer-Cooper, A., Harrowell, P. (2011). Structural phases in non-additive soft-disk mixtures: Glasses, substitutional order, and random tilings. Journal of Chemical Physics, 135(22), 224515-1-224515-10. [More Information]

2010

  • Baker, J., Widmer-Cooper, A., Toney, M., Geissler, P., Alivisatos, A. (2010). Device-scale perpendicular alignment of colloidal nanorods. Nano Letters, 10(1), 195-201. [More Information]
  • Candelier, R., Widmer-Cooper, A., Kummerfeld, J., Dauchot, O., Biroli, G., Harrowell, P., Reichman, D. (2010). Spatiotemporal hierarchy of relaxation events, dynamical heterogeneities, and structural reorganization in a supercooled liquid. Physical Review Letters, 105(13), 135702-1-135702-4. [More Information]

2009

  • Widmer-Cooper, A., Harrowell, P. (2009). Central role of thermal collective strain in the relaxation of structure in a supercooled liquid. Physical Review E, 80(6), 061501-1-061501-6. [More Information]
  • Lenzen, M., Lane, A., Widmer-Cooper, A., Williams, M. (2009). Effects of land use on threatened species [Efectos del uso de suelo sobre especies amenazadas]. Conservation Biology, 23(2), 294-306. [More Information]
  • Widmer-Cooper, A., Perry, H., Harrowell, P., Reichman, D. (2009). Localized soft modes and the supercooled liquid's irreversible passage through its configuration space. Journal of Chemical Physics, 131(19), 194508-1-194508-12. [More Information]

2008

  • Widmer-Cooper, A., Perry, H., Harrowell, P., Reichman, D. (2008). Irreversible reorganization in a supercooled liquid originates from localized soft modes. Nature Physics, 4(9), 711-715. [More Information]

2007

  • Widmer-Cooper, A., Harrowell, P. (2007). On the study of collective dynamics in supercooled liquids through the statistics of the isoconfigurational ensemble. Journal of Chemical Physics, 126(15), 154503-1-154503-9. [More Information]

2006

  • Widmer-Cooper, A., Harrowell, P. (2006). Free volume cannot explain the spatial heterogeneity of Debye–Waller factors in a glass-forming binary alloy. Journal of Non-Crystalline Solids, 352(42-49), 5098-5102. [More Information]
  • Widmer-Cooper, A., Harrowell, P. (2006). Predicting the long-time dynamic heterogeneity in a supercooled liquid on the basis of short-time heterogeneities. Physical Review Letters, 96(18), 185701-1-185701-4. [More Information]

2005

  • Widmer-Cooper, A., Harrowell, P. (2005). On the relationship between structure and dynamics in a supercooled liquid. Journal of Physics: Condensed Matter, 17(49), 4025-4034. [More Information]

2004

  • Widmer-Cooper, A., Harrowell, P., Fynewever, H. (2004). How Reproducible Are Dynamic Heterogeneities In A Supercooled Liquid? Physical Review Letters, 93(13), 135701-1-135701-4. [More Information]
  • Widmer-Cooper, A., Harrowell, P. (2004). How Reproducible Is The Structure Of Dynamic Heterogeneity In Glass Forming Liquids? Slow Dynamics in Complex Systems, New York: American Institute of Physics.

2001

  • Hambley, T., Lindoy, L., Reimers, J., Turner, P., Wei, G., Widmer-Cooper, A. (2001). Macrocyclic ligand design. X-ray, DFT and solution studies of the effect of N-methylation and N-benzylation of 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane on its affinity for selected transition and post-transition metal ions. Dalton Transactions, 2001, 614-620. [More Information]
  • Widmer-Cooper, A., Lindoy, L., Reimers, J. (2001). The effect of alkylation of N- and O-donor atoms on their strength of coordination to silver(I). The Journal of Physical Chemistry A, 105, 6567-6574. [More Information]

1999

  • Ayers, D., Gooley, P., Widmer-Cooper, A., Torda, A. (1999). Enhanced protein fold recognition using secondary structure information from NMR. Protein Science, 8(5), 1127-1133.

Selected Grants

2019

  • Computational Design of Metal-Organic Frameworks for Heavy Metal Removal from Water, Lessio M, Lessio M, Widmer-Cooper A, DVC Research/Postdoctoral Research Fellowship Scheme

2017

  • ARC Centre of Excellence in Exciton Science, Lakhwani G, McCamey D, Mulvaney P, Widmer-Cooper A, NSW Department of Industry/Research Attraction and Acceleration Program
  • ARC Centre of Excellence in Exciton Science, Baillie A, Mulvaney P, Ghiggino K, Smith T, Sader J, Wong W, Russo S, Cole J, Jasieniak J, Funston A, Bach U, Cheng Y, Lakhwani G, Widmer-Cooper A, McCamey D, Schmidt T, Australian Research Council (ARC)/ARC Centres of Excellence

Selected invited presentations

  • Keynote, 98th ACS Colloid and Surface Science Symposium (2024)
  • Keynote, AMMA Molecular Modelling (2023)
  • Gordon Research Conference on Crystal Growth & Assembly (2023)
  • Workshop on Nanoparticle Assemblies, Kavli Institute for Theoretical Physics (2023)

In the media