Dr Helen Chadwick

Research Officer, Chemistry

+44 (0) 1792 205678 ext 1524

h.j.chadwick@swansea.ac.uk

Office - 342
Second Floor
Grove Building
Singleton Campus

Available For Postgraduate Supervision

Research Links

https://orcid.org/0000-0003-4119-6903

Google Scholar

About

Dr Helen Chadwick completed her MChem at the University of Oxford in 2008, and her DPhil in Physical Chemistry in 2012. She received an EPSRC doctoral prize to continue her research as a post-doc in Oxford, before moving to the EPFL in Switzerland in 2013 to perform gas-surface dynamics experiments. At the end of 2016, Dr Chadwick obtained an Advanced Postdoc Mobility Fellowship from the Swiss National Science Foundation to spend two years in the Theoretical Chemistry group at Leiden University in the Netherlands, performing calculations to gain further insight into the experiments she did at the EPFL. Dr Chadwick joined the Surface Dynamics group at Swansea University as a Research Officer (senior post-doc) in February 2019, where her main focus has been developing the analysis methods that will be used to interpret data measured using the unique molecular beam interferometer housed in the Chemistry Department.

Areas Of Expertise

Gas-surface dynamics
Stereodynamics
Molecular beam scattering

Career Highlights

Research

The Surface Dynamics group has recently developed a new magnetic manipulation technique which allows us to control the rotational and nuclear spin projection states of ground state molecules. The focus of my research is to develop this technique to answer fundamental questions which have not been possible with previous state of the art methods for ground state molecules, including

How does the rotational orientation of a molecule (i.e. whether it is rotating like a helicopter or cartwheel) affect the outcome of the collision with a surface?
Can reaction rates or the probability of rotational energy transfer be controlled by changing the rotational orientation of gas phase molecules?
Can a single collision with a surface lead to either a nuclear spin flip or nuclear spin conversion in the molecule?

Publications

Research Highlights

Chadwick, H., Somers, M., Stewart, A., Alkoby, Y., Carter, T., Butkovicova, D., & Alexandrowicz, G. (2022). Stopping molecular rotation using coherent ultra-low-energy magnetic manipulations. Nature Communications, 13
https://doi.org/10.1038/s41467-022-29830-3, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa59903
Chadwick, H., Cantin, J., Alkoby, Y., & Alexandrowicz, G. (2022). Multiple echoes in beam spin-echo spectroscopy and their effect on measurements of ultra-fast dynamics. Journal of Physics: Condensed Matter, 34(34), 345901
https://doi.org/10.1088/1361-648x/ac7765, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60325
Chadwick, H. & Alexandrowicz, G. (2022). Measuring surface phonons using molecular spin-echo. Physical Chemistry Chemical Physics, 24(23), 14198-14208.
https://doi.org/10.1039/d2cp01372j, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60316
Chadwick, H., Alkoby, Y., Cantin, J., Lindebaum, D., Godsi, O., Maniv, T., & Alexandrowicz, G. (2021). Molecular spin echoes; multiple magnetic coherences in molecule surface scattering experiments. Physical Chemistry Chemical Physics, 23(13), 7673-7681.
https://doi.org/10.1039/d0cp05399f, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56035
Alkoby, Y., Chadwick, H., Godsi, O., Labiad, H., Bergin, M., Cantin, J., Litvin, I., Maniv, T., & Alexandrowicz, G. (2020). Setting benchmarks for modelling gas–surface interactions using coherent control of rotational orientation states. Nature Communications, 11(1)
https://doi.org/10.1038/s41467-020-16930-1, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa54556

All Research

Journal Articles

Chadwick, H. & Alexandrowicz, G. (2022). Measuring surface phonons using molecular spin-echo. Physical Chemistry Chemical Physics, 24(23), 14198-14208.
https://doi.org/10.1039/d2cp01372j, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60316
Chadwick, H., Cantin, J., Alkoby, Y., & Alexandrowicz, G. (2022). Multiple echoes in beam spin-echo spectroscopy and their effect on measurements of ultra-fast dynamics. Journal of Physics: Condensed Matter, 34(34), 345901
https://doi.org/10.1088/1361-648x/ac7765, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60325
Chadwick, H., Somers, M., Stewart, A., Alkoby, Y., Carter, T., Butkovicova, D., & Alexandrowicz, G. (2022). Stopping molecular rotation using coherent ultra-low-energy magnetic manipulations. Nature Communications, 13
https://doi.org/10.1038/s41467-022-29830-3, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa59903
Chadwick, H., Alkoby, Y., Cantin, J., Lindebaum, D., Godsi, O., Maniv, T., & Alexandrowicz, G. (2021). Molecular spin echoes; multiple magnetic coherences in molecule surface scattering experiments. Physical Chemistry Chemical Physics, 23(13), 7673-7681.
https://doi.org/10.1039/d0cp05399f, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56035
Alkoby, Y., Chadwick, H., Godsi, O., Labiad, H., Bergin, M., Cantin, J., Litvin, I., Maniv, T., & Alexandrowicz, G. (2020). Setting benchmarks for modelling gas–surface interactions using coherent control of rotational orientation states. Nature Communications, 11(1)
https://doi.org/10.1038/s41467-020-16930-1, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa54556
Brouard, M., Chadwick, H., Gordon, S., Heid, C., Hornung, B., Nichols, B., Kłos, J., Jambrina, P., & Aoiz, F. (2020). Differential cross sections and collision-induced rotational alignment in inelastic scattering of NO(X) by Xe. Chinese Journal of Chemical Physics, 33(2), 217-233.
https://doi.org/10.1063/1674-0068/cjcp2002020, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56036
https://ora.ox.ac.uk/objects/uuid:2ff3195f-3d38-4f5c-b5ec-a8c7ea9ab300
Chadwick, H., Gutiérrez-González, A., Beck, R., & Kroes, G. (2019). CHD3 Dissociation on the Kinked Pt(210) Surface: A Comparison of Experiment and Theory. The Journal of Physical Chemistry C
https://doi.org/10.1021/acs.jpcc.9b03051, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa50765
Chadwick, H., Gutiérrez-González, A., Beck, R., & Kroes, G. (2019). Transferability of the SRP32-vdW specific reaction parameter functional to CHD3 dissociation on Pt(110)-(2 × 1). The Journal of Chemical Physics, 150(12), 124702
https://doi.org/10.1063/1.5081005, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa49961
Gerrits, N., Chadwick, H., & Kroes, G. (2019). Dynamical Study of the Dissociative Chemisorption of CHD3 on Pd(111). The Journal of Physical Chemistry C, 123(39), 24013-24023.
https://doi.org/10.1021/acs.jpcc.9b05757, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa51901
http://dx.doi.org/10.1021/acs.jpcc.9b05757
Migliorini, D., Chadwick, H., & Kroes, G. (2018). Methane on a stepped surface: Dynamical insights on the dissociation of CHD3 on Pt(111) and Pt(211). The Journal of Chemical Physics, 149(9), 094701
https://doi.org/10.1063/1.5046065, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56038
Chadwick, H., Gutiérrez-González, A., Migliorini, D., Beck, R., & Kroes, G. (2018). Incident Angle Dependence of CHD3Dissociation on the Stepped Pt(211) Surface. The Journal of Physical Chemistry C, 122(34), 19652-19660.
https://doi.org/10.1021/acs.jpcc.8b05887, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56037
Chadwick, H., Migliorini, D., & Kroes, G. (2018). CHD3 dissociation on Pt(111): A comparison of the reaction dynamics based on the PBE functional and on a specific reaction parameter functional. The Journal of Chemical Physics, 149(4), 044701
https://doi.org/10.1063/1.5039458, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56039
Chadwick, H., Guo, H., Gutiérrez-González, A., Menzel, J., Jackson, B., & Beck, R. (2018). Methane dissociation on the steps and terraces of Pt(211) resolved by quantum state and impact site. The Journal of Chemical Physics, 148(1), 014701
https://doi.org/10.1063/1.5008567, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56040
Migliorini, D., Chadwick, H., Nattino, F., Gutiérrez-González, A., Dombrowski, E., High, E., Guo, H., Utz, A., Jackson, B., Beck, R., & Kroes, G. (2017). Surface Reaction Barriometry: Methane Dissociation on Flat and Stepped Transition-Metal Surfaces. The Journal of Physical Chemistry Letters, 8(17), 4177-4182.
https://doi.org/10.1021/acs.jpclett.7b01905, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56041
Brouard, M., Lawlor, J., McCrudden, G., Perkins, T., Seamons, S., Stevenson, P., Chadwick, H., & Aoiz, F. (2017). An experimental study of OH(A2Σ+) + H2: Electronic quenching, rotational energy transfer, and collisional depolarization. The Journal of Chemical Physics, 146(24), 244313
https://doi.org/10.1063/1.4989567, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56042
Chadwick, H. & Beck, R. (2017). Quantum State–Resolved Studies of Chemisorption Reactions. Annual Review of Physical Chemistry, 68(1), 39-61.
https://doi.org/10.1146/annurev-physchem-052516-044910, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56043
Chadwick, H., Gutiérrez-González, A., & Beck, R. (2016). Quantum state resolved molecular beam reflectivity measurements: CH4 dissociation on Pt(111). The Journal of Chemical Physics, 145(17), 174707
https://doi.org/10.1063/1.4966921, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56044
Chadwick, H. & Beck, R. (2016). Quantum state resolved gas–surface reaction dynamics experiments: a tutorial review. Chemical Society Reviews, 45(13), 3576-3594.
https://doi.org/10.1039/c5cs00476d, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56046
Brouard, M., Chadwick, H., Gordon, S., Hornung, B., Nichols, B., Aoiz, F., & Stolte, S. (2016). Stereodynamics in NO(X) + Ar inelastic collisions. The Journal of Chemical Physics, 144(22), 224301
https://doi.org/10.1063/1.4952649, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56045
https://ora.ox.ac.uk/objects/uuid:1da30ee0-34c9-44dc-97d8-16b257174d09
Brouard, M., Chadwick, H., Gordon, S., Hornung, B., Nichols, B., Aoiz, F., & Stolte, S. (2015). Rotational Orientation Effects in NO(X) + Ar Inelastic Collisions. The Journal of Physical Chemistry A, 119(50), 12404-12416.
https://doi.org/10.1021/acs.jpca.5b07846, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56047
Chen, L., Ueta, H., Chadwick, H., & Beck, R. (2015). The Negligible Role of C–H Stretch Excitation in the Physisorption of CH4on Pt(111). The Journal of Physical Chemistry C, 119(26), 14499-14505.
https://doi.org/10.1021/jp5064897, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56048
Nichols, B., Chadwick, H., Gordon, S., Eyles, C., Hornung, B., Brouard, M., Alexander, M., Aoiz, F., Gijsbertsen, A., & Stolte, S. (2015). Steric effects and quantum interference in the inelastic scattering of NO(X) + Ar. Chemical Science, 6(4), 2202-2210.
https://doi.org/10.1039/c4sc03842h, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56049
Brouard, M., Chadwick, H., Gordon, S., Hornung, B., Nichols, B., Kłos, J., Aoiz, F., & Stolte, S. (2014). Fully quantum state-resolved inelastic scattering of NO(X) + Kr: Differential cross sections and product rotational alignment. The Journal of Chemical Physics, 141(16), 164306
https://doi.org/10.1063/1.4897558, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56051
Chadwick, H., Nichols, B., Gordon, S., Hornung, B., Squires, E., Brouard, M., Kłos, J., Alexander, M., Aoiz, F., & Stolte, S. (2014). Inelastic Scattering of NO by Kr: Rotational Polarization over a Rainbow. The Journal of Physical Chemistry Letters, 5(19), 3296-3301.
https://doi.org/10.1021/jz501621c, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56050
Nattino, F., Ueta, H., Chadwick, H., Reijzen, M., Beck, R., Jackson, B., Hemert, M., & Kroes, G. (2014). Ab Initio Molecular Dynamics Calculations versus Quantum-State-Resolved Experiments on CHD3 + Pt(111): New Insights into a Prototypical Gas–Surface Reaction. The Journal of Physical Chemistry Letters, 5(8), 1294-1299.
https://doi.org/10.1021/jz500233n, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56052
Chadwick, H., Brouard, M., Perkins, T., & Aoiz, F. (2014). Collisional depolarisation in electronically excited radicals. International Reviews in Physical Chemistry, 33(1), 79-123.
https://doi.org/10.1080/0144235x.2014.891855, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56053
Chadwick, H., Brouard, M., Chang, Y., Eyles, C., McCrudden, G., Perkins, T., Seamons, S., Kłos, J., Alexander, M., Dagdigian, P., Herráez-Aguilar, D., & Aoiz, F. (2014). The collisional depolarization of OH(A 2Σ+) and NO(A 2Σ+) with Kr. The Journal of Chemical Physics, 140(5), 054306
https://doi.org/10.1063/1.4863446, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56054
Chadwick, H., Hundt, P., Reijzen, M., Yoder, B., & Beck, R. (2014). Quantum state specific reactant preparation in a molecular beam by rapid adiabatic passage. The Journal of Chemical Physics, 140(3), 034321
https://doi.org/10.1063/1.4861054, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56055
Lehman, J., Lester, M., Kłos, J., Alexander, M., Dagdigian, P., Herráez-Aguilar, D., Aoiz, F., Brouard, M., Chadwick, H., Perkins, T., & Seamons, S. (2013). Electronic Quenching of OH A 2Σ+ Induced by Collisions with Kr Atoms. The Journal of Physical Chemistry A, 117(50), 13481-13490.
https://doi.org/10.1021/jp407035p, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56057
Brouard, M., Chadwick, H., Eyles, C., Hornung, B., Nichols, B., Scott, J., Aoiz, F., Kłos, J., Stolte, S., & Zhang, X. (2013). The fully quantum state-resolved inelastic scattering of NO(X) + Ne: experiment and theory. Molecular Physics, 111(12-13), 1759-1771.
https://doi.org/10.1080/00268976.2013.783940, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56058
Brouard, M., Chadwick, H., Eyles, C., Hornung, B., Nichols, B., Aoiz, F., Jambrina, P., Stolte, S., & Miranda, M. (2013). Rotational alignment effects in NO(X) + Ar inelastic collisions: A theoretical study. The Journal of Chemical Physics, 138(10), 104309
https://doi.org/10.1063/1.4792158, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56060
Brouard, M., Chadwick, H., Eyles, C., Hornung, B., Nichols, B., Aoiz, F., Jambrina, P., & Stolte, S. (2013). Rotational alignment effects in NO(X) + Ar inelastic collisions: An experimental study. The Journal of Chemical Physics, 138(10), 104310
https://doi.org/10.1063/1.4792159, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56059
Brouard, M., Chadwick, H., Chang, Y., Howard, B., Marinakis, S., Screen, N., Seamons, S., & Via, A. (2012). The hyperfine structure of NO(A2Σ+). Journal of Molecular Spectroscopy, 282, 42-49.
https://doi.org/10.1016/j.jms.2012.11.003, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56061
Chadwick, H., Brouard, M., Chang, Y., Eyles, C., Perkins, T., Seamons, S., Kłos, J., Alexander, M., & Aoiz, F. (2012). A new potential energy surface for OH(A 2Σ+)–Kr: The van der Waals complex and inelastic scattering. The Journal of Chemical Physics, 137(15), 154305
https://doi.org/10.1063/1.4757859, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56062
Kłos, J., Aoiz, F., Menéndez, M., Brouard, M., Chadwick, H., & Eyles, C. (2012). Ab Initio studies of the interaction potential for the Xe–NO(X 2Π) van der Waals complex: Bound states and fully quantum and quasi-classical scattering. The Journal of Chemical Physics, 137(1), 014312
https://doi.org/10.1063/1.4731286, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56063
Eyles, C., Brouard, M., Chadwick, H., Aoiz, F., Kłos, J., Gijsbertsen, A., Zhang, X., & Stolte, S. (2012). The effect of parity conservation on the spin–orbit conserving and spin–orbit changing differential cross sections for the inelastic scattering of NO(X) by Ar. Physical Chemistry Chemical Physics, 14(16), 5420
https://doi.org/10.1039/c2cp23259f, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56064
Eyles, C., Brouard, M., Chadwick, H., Hornung, B., Nichols, B., Yang, C., Kłos, J., Aoiz, F., Gijsbertsen, A., Wiskerke, A., & Stolte, S. (2012). Fully Λ-doublet resolved state-to-state differential cross-sections for the inelastic scattering of NO(X) with Ar. Physical Chemistry Chemical Physics, 14(16), 5403
https://doi.org/10.1039/c2cp23258h, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56065
Brouard, M., Chadwick, H., Eyles, C., Aoiz, F., & Kłos, J. (2011). The k-j-j′ vector correlation in inelastic and reactive scattering. The Journal of Chemical Physics, 135(8), 084305
https://doi.org/10.1063/1.3625637, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56067
Brouard, M., Chadwick, H., Chang, Y., Eyles, C., Aoiz, F., & Kłos, J. (2011). Collisional angular momentum depolarization of OH(A) and NO(A) by Ar: A comparison of mechanisms. The Journal of Chemical Physics, 135(8), 084306
https://doi.org/10.1063/1.3625638, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56066
Costen, M., Livingstone, R., McKendrick, K., Paterson, G., Brouard, M., Chadwick, H., Chang, Y., Eyles, C., Aoiz, F., & Kłos, J. (2009). Elastic Depolarization of OH(A) by He and Ar: A Comparative Study†. The Journal of Physical Chemistry A, 113(52), 15156-15170.
https://doi.org/10.1021/jp905348c, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56070
Brouard, M., Chadwick, H., Chang, Y., Cireasa, R., & Eyles, C. (2009). Applications of Zeeman quantum beat spectroscopy to angular momentum polarization studies. Physica Scripta, 80(4), 048120
https://doi.org/10.1088/0031-8949/80/04/048120, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56069
Brouard, M., Chadwick, H., Chang, Y., Cireasa, R., Eyles, C., Via, A., Screen, N., Aoiz, F., & Kłos, J. (2009). Collisional depolarization of NO(A) by He and Ar studied by quantum beat spectroscopy. The Journal of Chemical Physics, 131(10), 104307
https://doi.org/10.1063/1.3212608, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56068

Supervision

Development of magnetic beam Imaging – a new approach for ultra-gentle surface microscopy (current)

PhD

Other supervisor: Prof Gil Alexandrowicz
Extending Magnetic Control Methods to Ground State Polyatomic Molecules. (current)

PhD

Other supervisor: Prof Gil Alexandrowicz
Studying molecule-surface interactions using magnetically manipulated molecular beams (awarded 2022)

PhD

Other supervisor: Prof Gil Alexandrowicz
Studying quantum-state resolved molecule surface collisions (current)

MSc

Other supervisor: Prof Gil Alexandrowicz

Dr Helen Chadwick

Telephone number

Email address

Research Links

About

Areas Of Expertise

Career Highlights

Publications

Research Highlights

All Research

Journal Articles

Supervision

Development of magnetic beam Imaging – a new approach for ultra-gentle surface microscopy (current)

Extending Magnetic Control Methods to Ground State Polyatomic Molecules. (current)

Studying molecule-surface interactions using magnetically manipulated molecular beams (awarded 2022)

Studying quantum-state resolved molecule surface collisions (current)