N
N.J. Koeman
Researcher at VU University Amsterdam
Publications - 35
Citations - 2103
N.J. Koeman is an academic researcher from VU University Amsterdam. The author has contributed to research in topics: Thin film & Yttrium. The author has an hindex of 21, co-authored 35 publications receiving 2012 citations.
Papers
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Journal ArticleDOI
Yttrium and lanthanum hydride films with switchable optical properties
J. N. Huiberts,R.P. Griessen,J.H. Rector,Rinke J. Wijngaarden,Jan P. Dekker,D.G. de Groot,N.J. Koeman +6 more
TL;DR: In this article, thin films of yttrium and lanthanum with a layer of palladium through which hydrogen can diffuse are used to simulate metal-to-insulator transitions.
Journal ArticleDOI
Yttrium and lanthanum hydride films with switchable optical properties
R.P. Griessen,J. N. Huiberts,M. Kremers,A.T.M. van Gogh,N.J. Koeman,Jan P. Dekker,Peter H. L. Notten +6 more
TL;DR: In this paper, it was shown that yttrium-, lanthanum, and rare earth-hydride films exhibit remarkable optical properties near their metal-insulator transition: the dihydrides are metallic and shiny while the trihydride are semiconducting and transparent.
Journal ArticleDOI
Visualization of hydrogen migration in solids using switchable mirrors
F.J.A. den Broeder,S. J. van der Molen,M. Kremers,J. N. Huiberts,D.G. Nagengast,A.T.M. van Gogh,W. H. Huisman,N.J. Koeman,Bernard Dam,J.H. Rector,S. Plota,M. Haaksma,R. M. N. Hanzen,RM Jungblut,P. A. Duine,R.P. Griessen +15 more
TL;DR: In this paper, the authors explore changes in the optical properties of yttrium films in which hydrogen diffuses laterally owing to a large concentration gradient and show that the formation of the various hydride phases is diffusion-controlled.
Journal ArticleDOI
Synthesis of yttriumtrihydride films for ex-situ measurements
J. N. Huiberts,J.H. Rector,Rinke J. Wijngaarden,S. Jetten,D.G. de Groot,Bernard Dam,N.J. Koeman,R.P. Griessen,Björgvin Hjörvarsson,Sveinn Olafsson,Y.S. Cho +10 more
TL;DR: In this paper, Huiberts et al. gave evidence for the island structure of the palladium overlayer and made a comparison of a number of physical properties of yttrium and its related hydrides as thin films with literature values for the same material in bulk form.