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

1 of 3

Room Temperature Dehydrogenation of Gaseous Methanol over Polycrystalline Gold Triggered and Traced by Oxygen K-edge X-rays (2025)
- Journal of Physical Chemistry C
Pietzsch, Annette; Niskanen, Johannes; Vaz da Cruz, Vinicius; Eckert, Sebastian; Fondell, Mattis; Jay, Raphael M.; Lu, Xingye; McNally, Daniel; Schmitt, Thorsten; Föhlisch, Alexander
(A1 Refereed original research article in a scientific journal)
Structural Sensitivity of N 1s Excitations in N-Methylacetamide Solutions (2025)
- Journal of Physical Chemistry Letters
Eronen, E. A.; Vladyka, A.; Sahle, Ch. J.; Niskanen, J.
(A1 Refereed original research article in a scientific journal)
Distinguishing the XUV-induced Coulomb explosion dynamics of iodobenzene using covariance analysis (2024)
- Journal of Physics B: Atomic, Molecular and Optical Physics
Walmsley, Tiffany; Allum, Felix; Harries, James R; Kumagai, Yoshiaki; Lim, Suzanne; McManus, Joseph; Nagaya, Kiyonobu; Britton, Mathew; Brouard, Mark; Bucksbaum, Philip; Fushitani, Mizuho; Gabalski, Ian; Gejo, Tatsuo; Hockett, Paul; Howard, Andrew J; Iwayama, Hiroshi; Kukk, Edwin; Lam, Chow-shing; Minns, Russell S; Niozu, Akinobu; Nishimuro, Sekito; Niskanen, Johannes; Owada, Shigeki; Razmus, Weronika O; Rolles, Daniel; Somper, James; Ueda, Kiyoshi; Unwin, James; Wada, Shin-ichi; Woodhouse, Joanne L; Forbes, Ruaridh; Burt, Michael; Warne, Emily M
(A1 Refereed original research article in a scientific journal)
Encoder–decoder neural networks in interpretation of X-ray spectra (2024)
- Journal of Electron Spectroscopy and Related Phenomena
Passilahti, Jalmari; Vladyka, Anton; Niskanen, Johannes
(A1 Refereed original research article in a scientific journal)
Generating interstitial water within the persisting tetrahedral H-bond network explains density increase upon compressing liquid water (2024)
- Proceedings of the National Academy of Sciences of the United States of America
Förster, Mirko; Ukoji, Nnanna; Sahle, Christoph J.; Niskanen, Johannes; Sakrowski, Robin; Surmeier, Göran; Weis, Christopher; Irifune, Tetsuo; Imoto, Sho; Yavas, Hasan; Huotari, Simo; Marx, Dominik; Sternemann, Christian; Tse, John S.
(A1 Refereed original research article in a scientific journal)
Implementation of the emulator-based component analysis (2024)
- Journal of Computational Science
Vladyka, Anton; Eronen, Eemeli A.; Niskanen, Johannes
(A1 Refereed original research article in a scientific journal)
Information bottleneck in peptide conformation determination by x-ray absorption spectroscopy (2024)
- Journal of Physics Communications
Eronen Eemeli A., Vladyka Anton, Gerbon Florent, Sahle Christoph J., Niskanen Johannes
(A1 Refereed original research article in a scientific journal)
Orientational anisotropy due to molecular field splitting in sulfur 2p photoemission from CS2 and SF6 - theoretical treatment and application to photoelectron recoil (2024)
- Physical Chemistry Chemical Physics
Kukk, Edwin; Niskanen, Johannes; Travnikova, Oksana; Berholts, Marta; Kooser, Kuno; Peng, Dawei; Ismail, Iyas; Piancastelli, Maria Novella; Püttner, Ralph; Hergerhahn, Uwe; Simon, Marc
(A1 Refereed original research article in a scientific journal)
Structural descriptors and information extraction from X-ray emission spectra: aqueous sulfuric acid (2024)
- Physical Chemistry Chemical Physics
Eronen, E. A.; Vladyka, A.; Sahle, Ch. J.; Niskanen, J.
(A1 Refereed original research article in a scientific journal)
Structural Descriptors and Information Extraction from X-ray Spectra of Liquids (2024)
- arXiv.org
Eronen E. A., Vladyka A., Sahle Ch. J., Niskanen J.

(Other publication)
Techno-Economic Analysis of Residential PV-Battery Energy System in Nordics (2024) Proceedings of the 41st European Photovoltaic Solar Energy Conference and Exhibition in Vienna, Austria Karttunen, Lauri; Jouttijärvi, Sami; Niskanen, Johannes; Jasielec, Jerzy J.; Huerta, Hugo; Ranta, Samuli; Miettunen, Kati
(Poster)
Techno-Economic Analysis of Residential PV-Battery Energy System in Nordics (2024)
- Proceedings of the European Photovoltaic Solar Energy Conference and Exhibition
Proceedings of the 41st European Photovoltaic Solar Energy Conference and Exhibition in Vienna, Austria Karttunen, Lauri; Jouttijärvi, Sami; Niskanen, Johannes; Jasielec, Jerzy J.; Huerta, Hugo; Ranta, Samuli; Miettunen, Kati
(A4 Refereed article in a conference publication )
The Role of Momentum Partitioning in Covariance Ion Imaging Analysis (2024)
- Journal of Physical Chemistry A
Walmsley Tiffany, McManus Joseph W., Kumagai Yoshiaki, Nagaya Kiyonobu, Harries James, Iwayama Hiroshi, Ashfold Michael N. R., Britton Mathew, Bucksbaum Philip H., Downes-Ward Briony, Driver Taran, Heathcote David, Hockett Paul, Howard Andrew J., Lee Jason W. L., Liu Yuson, Kukk Edwin, Milesevic Dennis, Minns Russell S., Niozu Akinobu, Niskanen Johannes, Orr-Ewing Andrew J., Owada Shigeki, Robertson Patrick A., Rolles Daniel, Rudenko Artem, Ueda Kiyoshi, Unwin James, Vallance Claire, Brouard Mark, Burt Michael, Allum Felix, Forbes Ruaridh
(A1 Refereed original research article in a scientific journal)
Time-Resolved Probing of the Iodobenzene C-Band Using XUV-Induced Electron Transfer Dynamics (2024)
- ACS Physical Chemistry Au
Unwin, James; Razmus, Weronika O.; Allum, Felix; Harries, James R.; Kumagai, Yoshiaki; Nagaya, Kiyonobu; Britton, Mathew; Brouard, Mark; Bucksbaum, Philip; Fushitani, Mizuho; Gabalski, Ian; Gejo, Tatsuo; Hockett, Paul; Howard, Andrew J.; Iwayama, Hiroshi; Kukk, Edwin; Lam, Chow-shing; McManus, Joseph; Minns, Russell S.; Niozu, Akinobu; Nishimuro, Sekito; Niskanen, Johannes; Owada, Shigeki; Pickering, James D.; Rolles, Daniel; Somper, James; Ueda, Kiyoshi; Wada, Shin-ichi; Walmsley, Tiffany; Woodhouse, Joanne L.; Forbes, Ruaridh; Burt, Michael; Warne, Emily M.
(A1 Refereed original research article in a scientific journal)
Direct momentum imaging of charge transfer following site-selective ionization (2023)
- Physical Review A
Allum F., Kumagai Y., Nagaya K., Harries J., Iwayama H., Britton M., Bucksbaum P.H., Burt M., Brouard M., Downes-Ward B., Driver T., Heathcote D., Hockett P., Howard A.J., Lee J.W.L., Liu Y., Kukk E., Mcmanus J.W., Milsesevic D., Niozu A., Niskanen J., Orr-Ewing A.J., Owada S., Robertson P.A., Rudenko A., Ueda K., Unwin J., Vallance C., Walmsley T., Minns R.S., Rolles D., Ashfold M.N.R., Forbes R.
(A1 Refereed original research article in a scientific journal)
Implementation of the Emulator-based Component Analysis (2023)
- arXiv.org
Vladyka Anton, Eronen Eemeli A., Niskanen Johannes
(Other publication)
Information Bottleneck in Peptide Conformation Determination by X-ray Absorption Spectroscopy (2023)
- arXiv.org
Eronen Eemeli A., Vladyka Anton, Gerbon Florent, Sahle Christoph J., Niskanen Johannes
(Other publication)
Isotope effects in dynamics of water isotopologues induced by core ionization at an x-ray free-electron laser (2023)
- Structural Dynamics
Guillemin R., Inhester L., Ilchen M., Mazza T., Boll R., Weber Th., Eckart S., Grychtol P., Rennhack N., Marchenko T., Velasquez N., Travnikova O., Ismail I., Niskanen J., Kukk E., Trinter F., Gisselbrecht M., Feifel R., Sansone G., Rolles D., Martins M., Meyer M., Simon M., Santra R., Pfeifer T., Jahnke T., Piancastelli M. N.
(A1 Refereed original research article in a scientific journal)
Photodissociation of bromine-substituted nitroimidazole radiosensitizers (2023)
- Physical Chemistry Chemical Physics
Pihlava Lassi, Berholts Marta, Niskanen Johannes, Vladyka Anton, Kooser Kuno, Stråhlman Christian, Eng-Johnsson Per, Kivimäki Antti, Kukk Edwin
(A1 Refereed original research article in a scientific journal)
Sensitivity of the Kβ″ X ray Emission Line to Coordination Changes in GeO2 and TiO2 (2023)
- Journal of Physical Chemistry Letters
Spiekermann G., Sahle Ch. J., Niskanen J., Gilmore K., Petitgirard S., Sternemann C., Tse J. S., Murakami M.
(A1 Refereed original research article in a scientific journal)