James Hallett

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+44 (0) 118 378 4402
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Lecturer in Physical Chemistry and International Tutor
- Lecturer in Physical Chemistry
- Undergraduate lab (physical) coordinator
- International Tutor
Office
227Building location
ChemistryAreas of interest
Dr Hallett’s current research interests involve the role of specific electrolytes in the structure and morphology of soft matter systems, such as films, membranes and gels.
These materials are studied using a variety of techniques, including 3D microscopy, surface force measurements and surface pressure measurements of supported films. He also has a longstanding interest in the use of X-ray and Neutron techniques at large facilities (Diamond, ISIS, ILL, MAXLAB, ESRF) to study soft matter systems.
Research centres and groups
Dr Hallett is part of the Soft Matter research group.
Background
Dr Hallett was appointed as a Lecturer in November 2021. Prior to that he was a Stipendiary Lecturer in Physical Chemistry for Trinity College Oxford and senior postdoctoral researcher working in the group of Professor Susan Perkin (University of Oxford, Physical and Theoretical Chemistry), starting in February 2018. Prior to this he was a postdoctoral researcher in the group of Professor Paddy Royall at The University of Bristol (Physics) using dense suspensions of nanoparticles to study the phenomenology of vitrification and gelation.He undertook his PhD studies under the supervision of Professors Paul Bartlett and Robert Richardson at the University of Bristol (chemistry), studying colloidal and liquid crystal systems for energy-efficient display applications.
Academic qualifications
PhD Functional Nanomaterials, University of Bristol, 2014
MSci Physics, University of Bristol, 2010
Professional bodies/affiliations
Associate member of the Royal Society of Chemistry
Publications
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Ortlieb, L.
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Ingebrigtsen, T.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Turci, F. , Royall, C. (2023) Probing excitations and cooperatively rearranging regions in deeply supercooled liquids. Nature Communications , 14 ISSN: 2041-1723 | doi: https://dx.doi.org/10.1038/s41467-023-37793-2
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Agg, K. , Perkin, S. (2023) Zwitterions fine-tune interactions in electrolyte solutions. Proceedings of the National Academy of Sciences , 120 (8). ISSN: 1091-6490 | doi: https://dx.doi.org/10.1073/pnas.2215585120
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Royall, C.
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Faers, M.
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Fussell, S.
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Hallett, J.
ORCID: 0000-0002-9747-9980 (2021) Real space analysis of colloidal gels: triumphs, challenges and future directions. Journal of Physics: Condensed Matter , 33 (45). ISSN: 1361-648X | doi: https://dx.doi.org/10.1088/1361-648X/ac04cb
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Cornel, E.
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Smith, G.
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Rogers, S.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Growney, D. , Smith, T. , O'Hora, P. , Van Meurs, S. , Mykhaylyk, O. , Armes, S. (2020) Time-resolved small-angle neutron scattering studies of the thermally-induced exchange of copolymer chains between spherical diblock copolymer nanoparticles prepared via polymerization-induced self-assembly. Soft Matter , 16 (15). pp. 3657-3668. ISSN: 1744-6848 ISBN: 17446848 1744683X | doi: https://dx.doi.org/10.1039/c9sm02425e
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Hayler, H. , Perkin, S. (2020) Nanolubrication in deep eutectic solvents. Physical Chemistry Chemical Physics , 22 (36). pp. 20253-20264. ISSN: 1463-9076 | doi: https://dx.doi.org/10.1039/D0CP03787G
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Smith, G.
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Grillo, I.
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Hallett, J.
ORCID: 0000-0002-9747-9980 (2020) Molecular exchange in spherical diblock copolymer colloids synthesised by polymerisation-induced self-assembly. Journal of Colloid and Interface Science , 579 pp. 243-249. ISSN: 0021-9797 ISBN: 10957103 00219797 | doi: https://dx.doi.org/10.1016/j.jcis.2020.06.022
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Turci, F.
ORCID: 0000-0002-0687-0715 , Patrick Royall, C. (2020) The devil is in the details: pentagonal bipyramids and dynamic arrest. Journal of Statistical Mechanics: Theory and Experiment , 2020 (1). ISSN: 1742-5468 | doi: https://dx.doi.org/10.1088/1742-5468/ab5369
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Grillo, I. , Smith, G. (2020) A Neutron scattering study of the structure of poly(dimethylsiloxane)-stabilized poly(methyl methacrylate) (PDMS–PMMA) latexes in dodecane. Langmuir , 36 (8). pp. 2071-2081. ISSN: 0743-7463 | doi: https://dx.doi.org/10.1021/acs.langmuir.9b03911
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Smith, A.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Perkin, S. (2019) Solidification and superlubricity with molecular alkane films. Proceedings of the National Academy of Sciences of the United States of America , 116 (51). pp. 25418-25423. ISSN: 1091-6490 ISBN: 10916490 00278424 | doi: https://dx.doi.org/10.1073/pnas.1910599116
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Smith, G.
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Derry, M.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Lovett, J. , Mykhaylyk, O. , Neal, T. , Prévost, S. , Armes, S. (2019) Refractive index matched, nearly hard polymer colloids. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences , 475 (2226). ISSN: 1471-2946 | doi: https://dx.doi.org/10.1098/rspa.2018.0763
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Richard, D.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Speck, T. , Royall, C. (2018) Coupling between criticality and gelation in “sticky” spheres: a structural analysis. Soft Matter , 14 (27). pp. 5554-5564. ISSN: 1744-6848 | doi: https://dx.doi.org/10.1039/C8SM00389K
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Gillespie, D. , Richardson, R.
ORCID: 0000-0002-5084-2463 , Bartlett, P.
ORCID: 0000-0002-4680-4894 (2018) Charge regulation of nonpolar colloids. Soft Matter , 14 (3). pp. 331-343. ISSN: 1744-6848 | doi: https://dx.doi.org/10.1039/c7sm01825h
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Williams, I.
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Turci, F.
ORCID: 0000-0002-0687-0715 , Hallett, J.
ORCID: 0000-0002-9747-9980 , Crowther, P.
ORCID: 0000-0002-5430-6924 , Cammarota, C. , Biroli, G. , Royall, P. (2018) Experimental determination of configurational entropy in a two-dimensional liquid under random pinning. Journal of Physics: Condensed Matter , 30 (9). ISSN: 1361-648X | doi: https://dx.doi.org/10.1088/1361-648X/aaa869
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Turci, F. , Royall, C. (2018) Local structure in deeply supercooled liquids exhibits growing lengthscales and dynamical correlations. Nature Communications , 9 (1). ISSN: 2041-1723 | doi: https://dx.doi.org/10.1038/s41467-018-05371-6
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Hayward, D. , Arnold, T. , Bartlett, P. , Richardson, R. (2017) X-ray reflectivity reveals ionic structure at liquid crystal–aqueous interfaces. Soft Matter , 13 (33). pp. 5535-5542. ISSN: 1744-6848 | doi: https://dx.doi.org/10.1039/C7SM01261F
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Razali, A.
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Fullerton, C.
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Turci, F.
ORCID: 0000-0002-0687-0715 , Hallett, J.
ORCID: 0000-0002-9747-9980 , Jack, R. , Royall, C. (2017) Effects of vertical confinement on gelation and sedimentation of colloids. Soft Matter , 13 (17). pp. 3230-3239. ISSN: 1744-6848 | doi: https://dx.doi.org/10.1039/C6SM02221A
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Pinchaipat, R.
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Campo, M.
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Turci, F.
ORCID: 0000-0002-0687-0715 , Hallett, J.
ORCID: 0000-0002-9747-9980 , Speck, T. , Royall, C. (2017) Experimental evidence for a structural-dynamical transition in trajectory space. Physical Review Letters , 119 (2). ISSN: 1079-7114 | doi: https://dx.doi.org/10.1103/PhysRevLett.119.028004
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Smith, G.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Joseph, P. , Tretsiakova-McNally, S. , Zhang, T. , Blum, F. , Eastoe, J. (2017) Structural studies of thermally stable, combustion-resistant polymer composites. Polymer Journal , 49 pp. 711-719. ISSN: 13490540 | doi: https://dx.doi.org/10.1038/pj.2017.44
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Bennett, N.
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Seddon, A.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Kockelmann, W. , Ting, V. , Sadasivan, S. , Tooze, R. , Hall, S. (2016) Mesoporous tertiary oxides via a novel amphiphilic approach. APL Materials , 4 (1). ISSN: 2166-532X | doi: https://dx.doi.org/10.1063/1.4930808
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Smith, G.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Eastoe, J. (2015) Celebrating Soft Matter's 10th Anniversary: influencing the charge of poly(methyl methacrylate) latexes in nonpolar solvents. Soft Matter , 11 (41). pp. 8029-8041. ISSN: 1744-683X | doi: https://dx.doi.org/10.1039/c5sm01190f
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Thomas, M.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Klein, S. , Mann, S. , Perriman, A.
ORCID: 0000-0003-2205-9364 , Richardson, R.
ORCID: 0000-0002-5084-2463 (2015) Stability and orientational order of gold nanorods in nematic suspensions: a small angle X-ray scattering study. Molecular Crystals and Liquid Crystals , 610 (1). pp. 44-50. ISSN: 1563-5287 | doi: https://dx.doi.org/10.1080/15421406.2015.1025204 (Conference Proceeding: 25th International Liquid Crystal Conference (ILCC 2014))
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Gillespie, D.
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Elujoba, O. , Che Hamzah, A. , Richardson, R.
ORCID: 0000-0002-5084-2463 , Bartlett, P.
ORCID: 0000-0002-4680-4894 (2014) Counterion condensation on spheres in the salt-free limit. Soft Matter , 10 (4). pp. 566-577. ISSN: 1744-6848 | doi: https://dx.doi.org/10.1039/C3SM52563E
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Hallett, J.
ORCID: 0000-0002-9747-9980 , Hayward, D. , Bartlett, P.
ORCID: 0000-0002-4680-4894 , Richardson, R.
ORCID: 0000-0002-5084-2463 (2014) A small-angle X-ray scattering study of nanoparticle assembly in an aligned nematic liquid crystal. Liquid Crystals , 41 (12). pp. 1791-1802. ISSN: 1366-5855 | doi: https://dx.doi.org/10.1080/02678292.2014.950618
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Rands, S.
ORCID: 0000-0002-7400-005X , Clarke, D. , Hallett, J.
ORCID: 0000-0002-9747-9980 , Whitney, H. (2010) Unusual honey pot building behaviour in captively reared bumble bees Bombus terrestris. Journal of Apicultural Research , 49 (4). pp. 345 - 347. ISSN: 0078-6913 | doi: https://dx.doi.org/10.3896/IBRA.1.49.4.11