Johannes Niskanen

- University Research Fellow,
Materials Research Laboratory (Department of Physics and Astronomy)

johannes.niskanen@utu.fi

+358 29 450 4160

+358 50 577 8622

Vesilinnantie 5

Turku

Office: 340

Areas of expertise

X-ray; spectroscopy; molecule; liquids; statistical simulation; machine learning

Research community or research topic

X-rays are a unique probe of systems with a wide variation of atomistic structures: liquids and amorphous matter. I investigate the structural information content of these spectra.

Biography

Teaching

Publications

2 of 3

Towards Structural Reconstruction from X-Ray Spectra (2023)
- Physical Chemistry Chemical Physics
Vladyka Anton, Sahle Christoph J., Niskanen Johannes
(A1 Refereed original research article in a scientific journal)
A new benchmark of soft X-ray transition energies of Ne, CO2, and SF6: paving a pathway towards ppm accuracy (2022)
- European Physical Journal D
Stierhof J, Kuhn S, Winter M, Micke P, Steinbrugge R, Shah C, Hell N, Bissinger M, Hirsch M, Ballhausen R, Lang M, Grafe C, Wipf S, Cumbee R, Betancourt-Martinez GL, Park S, Niskanen J, Chung M, Porter FS, Stohlker T, Pfeifer T, Brown GV, Bernitt S, Hansmann P, Wilms J, Lopez-Urrutia JRC, Leutenegger MA
(A1 Refereed original research article in a scientific journal)
Cuts through the manifold of molecular H2O potential energy surfaces in liquid water at ambient conditions (2022)
- Proceedings of the National Academy of Sciences of the United States of America
Pietzsch Annette, Niskanen Johannes, Vaz da Cruz Vinicius, Büchner Robby, Eckert Sebastian, Fondell Mattis, Jay Raphael M., Lu Xingye, McNally Daniel, Schmitt Thorsten, Föhlisch Alexander
(A1 Refereed original research article in a scientific journal)
Disentangling sequential and concerted fragmentations of molecular polycations with covariant native frame analysis (2022)
- Physical Chemistry Chemical Physics
McManus Joseph W., Walmsley Tiffany, Nagaya Kiyonobu, Harries James R., Kumagai Yoshiaki, Iwayama Hiroshi, Ashfold, Michael N. R., Britton Mathew, Bucksbaum Philip H., Downes-Ward Briony, Driver Taran, Heathcote David, Hockett Paul, Howard, Andrew J., Kukk Edwin, Lee Jason W. L., Liu Yusong, Milesevic Dennis, Minns Russell S., Niozu Akinobu, Niskanen Johannes, Orr-Ewing Andrew J., Owada Shigeki, Rolles Daniel, Robertson Patrick A., Rudenko Artem, Ueda Kiyoshi, Unwin James, Vallance Claire, Burt Michael, Brouard Mark, Forbes Ruaridh, Allum Felix
(A1 Refereed original research article in a scientific journal)
Emulator-based decomposition for structural sensitivity of core-level spectra (2022)
- Royal Society Open Science
Niskanen Johannes, Vladyka Anton, Niemi Joonas, Sahle Christoph J.
(A1 Refereed original research article in a scientific journal)
Hydration in aqueous NaCl (2022)
- Physical Chemistry Chemical Physics
Sahle Christoph J., de Clermont Gallerande Emmanuelle, Niskanen Johannes, Longo Alessandro, Elbers Mirko, Schroer Martin A., Sternemann Christian, Jahn Sandro
(A1 Refereed original research article in a scientific journal)
Machine learning in interpretation of electronic core-level spectra (2022)
- Journal of Electron Spectroscopy and Related Phenomena
Niskanen Johannes, Vladyka Anton, Kettunen J. Antti, Sahle Christoph
(A1 Refereed original research article in a scientific journal)
Time-resolved Imaging of Transient Charge Transfer Dynamics (2022) The International Conference on Ultrafast Phenomena (UP) 2022, 18–22 July 2022, Montreal, Quebec, Canada Allum Felix, Kumagai Yoshiaki, Nagaya Kiyonobu, Harries James, Iwayama Hiroshi, Niozu Akinobu, Ashfold Mike, Britton Mathew, Bucksbaum Philip, Brouard Mark, Burt Michael, Heathcote David, Hockett Paul, Howard Andrew, Kukk Edwin, Lee Jason, Liu Yusong, McManus Joseph, Milesevic Dennis, Minns Russell, Niskannen Johannes, Orr-Ewing Andrew, Rolles Daniel, Rudenko Artem, Ueda Kiyoshi, Unwin James, Vallance Claire, Walmsley Tiffanny, Forbes Ruaridh
(Other publication)
Formative period in the x-ray-induced photodissociation of organic molecules (2021)
- Physical Review Research
Kukk E., Fukuzawa H., Niskanen J., Nagaya K., Kooser K., You D., Peschel J., Maclot S., Niozu A., Saito S., Luo Y., Pelimanni E., Itälä E., Bozek J.D., Takanashi T., Berholts M., Johnsson P., Ueda K.
(A1 Refereed original research article in a scientific journal)
Inner-shell-ionization-induced femtosecond structural dynamics of water molecules imaged at an x-ray free-electron laser (2021)
- Physical Review X
Jahnke T., Guillemin R., Inhester L., Son S.-K., Kastirke G., Ilchen M., Rist J., Trabert D., Melzer N., Anders N., Mazza T., Boll R., De Fanis A., Music V., Weber Th., Weller M., Eckart S., Fehre K., Grundmann S., Hartung A., Hofmann M., Janke C., Kircher M., Nalin G., Pier A., Siebert J., Strenger N., Vela-Perez I., Baumann T. M., Grychtol P., Montano J., Ovcharenko Y., Rennhack N., Rivas D. E., Wagner R., Ziolkowski P., Schmidt P., Marchenko T., Travnikova O., Journel L., Ismail I., Kukk E., Niskanen J., Trinter F., Vozzi C., Devetta M., Stagira S., Gisselbrecht M., Jäger A. L., Li X., Malakar Y., Martins M., Feifel R., Schmidt L. Ph., Czasch A., Sansone G., Rolles D., Rudenko A., Moshammer R., Dörner R., Meyer M., Pfeifer T., Schöffler M. S., Santra R., Simon M., Piancastelli M. N.
(A1 Refereed original research article in a scientific journal)
Machine learning in interpretation of electronic core-level spectra (2021) Niskanen Johannes, Vladyka Anton, Kettunen J. Antti, Sahle Christoph J.
(Other publication)
Multi-channel photodissociation and XUV-induced charge transfer dynamics in strong-field-ionized methyl iodide studied with time-resolved recoil-frame covariance imaging (2021)
- Faraday Discussions
Allum Felix, Anders Nils, Brouard Mark, Bucksbaum Phil H, Burt Michael, Downes-Ward Briony, Grundmann Sven, Harries James, Ishimura Yudai, Iwayama Hiroshi, Kaiser Leon, Kukk Edwin, Lee Jason WL, Liu Xiaojing, Minns Russell S, Nagaya Kiyonobu, Niozu Akinobu, Niskanen Johannes, O'Neal Jordan T, Owada Shigeki, Pickering James, Rolles Daniel, Rudenko Artem, Saito Shu, Ueda Kiyoshi, Vallance Claire, Werby Nicholas, Woodhouse Joanne, You Daehyun, Ziaee Farzaneh, Driver Taran, Forbes Ruaridh
(A1 Refereed original research article in a scientific journal)
Photodissociation dynamics of halogenated aromatic molecules: the case of core-ionized tetrabromothiophene (2021)
- Physical Chemistry Chemical Physics
Pihlava Lassi, Niskanen Johannes, Kooser Kuno, Stråhlman Christian, Maclot Sylvain, Kivimäki Antti, Kukk Edwin
(A1 Refereed original research article in a scientific journal)
Fragmentation Patterns of Radiosensitizers Metronidazole and Nimorazole upon Valence Ionization (2020)
- Journal of Physical Chemistry A
Itälä Eero, Niskanen Johannes, Pihlava Lassi, Kukk Edwin
(A1 Refereed original research article in a scientific journal)
High-Precision Determination of Oxygen-Kα Transition Energy Excludes Incongruent Motion of Interstellar Oxygen (2020)
- Physical Review Letters
M. A. Leutenegger, S. Kühn, P. Micke, R. Steinbrügge, J. Stierhof, C. Shah, N.Hell, M. Bissinger, M. Hirsch, R. Ballhausen, M. Lang, C. Gräfe, S. Wipf, R. Cumbee, G. L. Betancourt-Martinez, S. Park, V. A. Yerokhin, A. Surzhykov, W. C. Stolte, J. Niskanen, M. Chung, F. S. Porter, T. Stöhlker, T. Pfeifer, J. Wilms, G. V. Brown, J. R. Crespo López-Urrutia, S. Bernitt
(A1 Refereed original research article in a scientific journal)
Hydration in aqueous osmolyte solutions: the case of TMAO and urea (2020)
- Physical Chemistry Chemical Physics
Sahle CJ, Schroer MA, Niskanen J, Elbers M, Jeffries CM, Sternemann C
(A1 Refereed original research article in a scientific journal)
Time-resolved dynamics of thiophene dication - probing parent molecule survival times and multi-step dissociation processes of cyclic molecules by free-electron-laser experiments combined with theoretical simulations (2020)
- Journal of Physics: Conference Series
31st International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXXI) 23-30 July 2019, Deauville, France Kukk E, Fukuzawa H, Nagaya K, Niskanen J, Luo Y, Peschel J, Kooser K, Itl E, Pelimanni E, Saito S, You D, Maclot S, Nizou A, Ha DT, Myllynen H, Ueda K
(A4 Refereed article in a conference publication )
Compatibility of quantitative X-ray spectroscopy with continuous distribution models of water at ambient conditions (2019)
- Proceedings of the National Academy of Sciences of the United States of America
Johannes Niskanen, Mattis Fondell, Christoph J. Sahle, Sebastian Eckert, Raphael M. Jay, Keith Gilmore, Annette Pietzsch, Marcus Dantz, Xingye Lu, Daniel E. McNally, Thorsten Schmitt, Vinicius Vaz da Cruz, Victor Kimberg, Faris Gel’mukhanov, Alexander Föhlisch
(A1 Refereed original research article in a scientific journal)
Controlling NO Production Upon Valence Ionization of Nitroimidazoles (2019)
- Journal of Physical Chemistry A
Eero Itälä, Hanna Myllynen, Johannes Niskanen, Jesús González-Vázquez, Yang Wang, Dang Trinh Ha, Stephan Denifl, Edwin Kukk
(A1 Refereed original research article in a scientific journal)
Nuclear dynamics in resonant inelastic X-ray scattering and X-ray absorption of methanol (2019)
- Journal of Chemical Physics
da Cruz VV, Ignatova N, Couto RC, Fedotov DA, Rehn DR, Savchenko V, Norman P, Agren H, Polyutov S, Niskanen J, Eckert S, Jay RM, Fondell M, Schmitt T, Pietzsch A, Fohlisch A, Gel'mukhanov F, Odelius M, Kimberg V
(A1 Refereed original research article in a scientific journal)