Petra Rudolf

Prof. Petra Rudolf

Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AGGroningen, The Netherlands
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Research Focus & Metrics

Academic Career Length

42Years (1985-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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28 August 2005 in Nature Materials
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Jose BernaJose Berna
Jose Berna
DLDavid A. Leigh
David A. Leigh
MLMonika Lubomska
Monika Lubomska
SMSandra M. Mendoza
Sandra M. Mendoza
EPEmilio Perez
Emilio Perez
Francesco ZerbettoFrancesco Zerbetto
Francesco Zerbetto

26 May 2010 in ACS Nano
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MQMildred Quintana
Mildred Quintana
KSKonstantinos Spyrou
Konstantinos Spyrou
MGMarek Grzelczak
Marek Grzelczak
WBWesley R. Browne
Wesley R. Browne
Petra RudolfPetra Rudolf
Petra Rudolf
MPMaurizio Prato
Maurizio Prato

7 February 2023 in Nature Communications
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HHHamoon Hemmatpour
Hamoon Hemmatpour
Oreste De LucaOreste De Luca
Oreste De Luca
DCDominic Crestani
Dominic Crestani
MSMarc C.A. Stuart
Marc C.A. Stuart
ALAlessia Lasorsa
Alessia Lasorsa
Petra RudolfPetra Rudolf
Petra Rudolf
Polydopamine is a biomimetic self-adherent polymer, which can be easily deposited on a wide variety of materials. Despite the rapidly increasing interest in polydopamine-based coatings, the polymerization mechanism and the key intermediate species formed during the deposition process are still controversial. Herein, we report a systematic investigation of polydopamine formation on halloysite nanotubes; the negative charge and high surface area of halloysite nanotubes favour the capture of intermediates that are involved in polydopamine formation and decelerate the kinetics of the process, to unravel the various polymerization steps. Data from X-ray photoelectron and solid-state nuclear magnetic resonance spectroscopies demonstrate that in the initial stage of polydopamine deposition, oxidative coupling reaction of the dopaminechrome molecules is the main reaction pathway that leads to formation of polycatecholamine oligomers as an intermediate and the post cyclization of the linear oligomers occurs subsequently. Furthermore, TRIS molecules are incorporated into the initially formed oligomers.

20 April 1992 in Physical Review Letters
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CCC. T. Chen
C. T. Chen
LTLiu Hao Tjeng
Liu Hao Tjeng
JKJ. Kwo
J. Kwo
HKH. L. Kao
H. L. Kao
Petra RudolfPetra Rudolf
Petra Rudolf
RFR. M. Fleming
R. M. Fleming
Bulk-sensitive, polarization-dependent oxygen K- and copper L-edge absorption spectra of single-domain La2−x Srx CuO4 with CuO2 planes tilted off the sample surface were measured. A novel experimental configuration was utilized to achieve complete polarization geometry and eliminate optical path variations. Contrary to previous measurements, our data show for both intrinsic and doped holes a significant amount of O2pz character, likely associated with apical O, but a very weak Cu3d3z2-r2 character. The quantitative results impose strong contraints on superconductivity models invoking out-of-plane orbitals, and suggest that the apical O 2pz orbital may play an important role in high-Tc phenomena.

8 August 2013 in Advanced Functional Materials
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LALia Asri
Lia Asri
MCMihaela Crismaru
Mihaela Crismaru
SRSteven Roest
Steven Roest
YCYun Chen
Yun Chen
OIOleksii Ivashenko
Oleksii Ivashenko
HBHenk J. Busscher
Henk J. Busscher

8 March 1993 in Physical Review Letters
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PKPieter Kuiper
Pieter Kuiper
BSBarry G. Searle
Barry G. Searle
Petra RudolfPetra Rudolf
Petra Rudolf
LTLiu Hao Tjeng
Liu Hao Tjeng
CCC. T. Chen
C. T. Chen
We report strong magnetic linear dichroism at the Fe L2,3 edge of the antiferromagnet Fe2 O3 (hematite). The relative difference in absorption for light polarized parallel and perpendicular to the magnetic moment is as high as 40% at the Fe L2 edge. The spectra are in excellent agreement with calculations of magnetic dichroism for Fe3+ (3d5). The magnetic origin of this dichroism is demonstrated by the Morin transition at ≊-10 °C, where the moments in Fe2 O3 rotate by 90°. Magnetic linear dichroism may be applied to measure the spin orientation in thin films and multilayers, and to image magnetic domains.