J. Keinonen

University of Helsinki — Finland

Engineering · Physical Sciences

53h-index11.8kcitations360works0.02yr avg
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Research Topics

Ion-surface interactions and analysis(140), Nuclear physics research studies(72), Nuclear Physics and Applications(57), Semiconductor materials and devices(52), X-ray Spectroscopy and Fluorescence Analysis(44)

Publications360 total

Absence of single critical dose for the amorphization of quartz under ion irradiation
Journal of Physics Condensed Matter·2017· 8 citedOpen Access
Non-invasive transmission electron microscopy of vacancy defects in graphene produced by ion irradiation
Nanoscale·2014· 63 citedOpen Access
Dual origin of defect magnetism in graphene and its reversible switching by molecular doping
Nature Communications·2013· 258 citedOpen Access
Stopping cross sections of atomic layer deposited Al2O3 and Ta2O5 and of Si3N4 for 12C, 16O, 35Cl, 79Br and 127I ions
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms·2013· 6 cited
Self-assembly of oxide-supported metal clusters into ring-like structures
Nanotechnology·2012
Ion‐Irradiation‐Induced Defects in Isotopically‐Labeled Two Layered Graphene: Enhanced In‐Situ Annealing of the Damage
Advanced Materials·2012· 91 cited
Simulation of irradiation induced deuterium trapping in tungsten
Journal of Nuclear Materials·2012· 75 cited
Stopping forces of polyimide, vyns, formvar, and polysulfone for Cl, Br, and I ions
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms·2012· 4 cited
Spin-half paramagnetism in graphene induced by point defects
Nature Physics·2012· 846 citedOpen Access
Characterization of ion-irradiation-induced defects in multi-walled carbon nanotubes
New Journal of Physics·2011· 62 citedOpen Access
Cutting and controlled modification of graphene with ion beams
Nanotechnology·2011· 145 citedOpen Access
Production of defects in hexagonal boron nitride monolayer under ion irradiation
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms·2010· 64 cited
Hydrogen interaction with point defects in tungsten
Physical Review B·2010· 262 cited
Amorphization of α-quartz and comparative study of defects in amorphized quartz and Si nanocrystals embedded in amorphous silica
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms·2010· 4 cited
Effects of ion bombardment on a two-dimensional target: Atomistic simulations of graphene irradiation
Physical Review B·2010· 380 cited
LIGHT EMITTING DEFECTS IN ION-IRRADIATED ALPHA-QUARTZ AND SILICON NANOCLUSTERS
Pan Stanford Publishing eBooks·2010
Ion irradiation of multi‐walled boron nitride nanotubes
Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics·2010· 22 citedOpen Access
Ion irradiation of multi-walled boron nitride nanotubes
Science & Engineering Faculty·2010
Using car4ams, the Bayesian AMS Data Analysis Code
Radiocarbon·2010· 4 citedOpen Access
Improving AMS uncertainties and detection of instrumental error
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms·2009· 5 cited
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Frequent Co-authors

K. Nordlund(21), Arkady V. Krasheninnikov(13), Timo Sajavaara(9), Ossi Lehtinen(8), Mikko Ritala(8), Markku Leskelä(8), Kaupo Kukli(4), Jani Kotakoski(4), J. Nord(4), Rahul R. Nair(3), I-Ling Tsai(3), I. V. Grigorieva(3), T. Ahlgren(3), K. O. E. Henriksson(3), Kai Arstila(3), O. Häusser(3), H.R. Andrews(3), D. Ward(3), M. Sepioni(2), A. K. Geǐm(2)