ORCID Profile
0000-0002-4904-2813
Current Organisation
University of Oxford
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Wiley
Date: 25-04-2017
Abstract: The discovery of the ultra-high thermoelectric figure of merit of 2.6 in SnSe has drawn attention to other lead-free IV-VI orthorhombic semiconductors. GeSe has been predicted to possess thermoelectric performances comparable to SnSe. Here, a complete structural study is reported of GeSe with temperature by means of high-resolution synchrotron powder X-ray diffraction. In the orthorhombic phase, the evolution of the bond distances with temperature is shown to deviate significantly with respect to SnSe. Analysis of the chemical bonding within the Quantum Theory of Atoms in Molecules shows that GeSe is ionic with van der Waals interlayer interactions. The signature of the N shell lone pair of Ge is also evident from both the electron density Laplacian and the ELF topologies.
Publisher: Wiley
Date: 10-05-2017
DOI: 10.1111/JACE.14932
Publisher: American Chemical Society (ACS)
Date: 16-06-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6DT03459D
Abstract: Phase pure polycrystalline MnSb 2 O 4 was synthesised under hydrothermal conditions, and the crystal structure was studied using single crystal and synchrotron powder X-ray diffraction from 100–1000 K.
Publisher: American Chemical Society (ACS)
Date: 21-07-2014
DOI: 10.1021/CM501681R
Publisher: Wiley
Date: 26-02-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA41854E
Publisher: American Chemical Society (ACS)
Date: 17-04-2014
DOI: 10.1021/NN5010638
Abstract: The formation, growth, and phase transition of colloidal monodisperse spherical copper sulfide nanocrystals synthesized in dodecanethiol have been followed by in situ synchrotron powder X-ray diffraction (PXRD). The formation of nanocrystals involves a thermal decomposition of the crystalline precursor [CuSC12H25], which upon heating forms an isotropic liquid that subsequently turns into colloidal β-chalcocite phase Cu2S nanocrystals. The redox reaction step in the precursor solution has been studied by proton NMR. Upon heating, high digenite phase nanocrystals are formed through a solid-state rearrangement phase transition of the β-chalcocite phase nanocrystals at temperatures above 260 °C. TEM and PXRD reveal that the nanocrystal size is independent of synthesis temperature and stabilizes after the phase transition has completed. Spherical monodisperse nanocrystals are obtained in all experiments, with the nanocrystals in the β-chalcocite phase (7 nm) being smaller than those in high digenite phase (11 nm).
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CE02224F
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR04459F
Abstract: An understanding of the nucleation and growth mechanism of bimetallic nanoparticles in solvothermal synthesis is important for further development of nanoparticles with tailored nanostructures and properties.
Publisher: American Chemical Society (ACS)
Date: 19-01-2016
Publisher: American Chemical Society (ACS)
Date: 13-04-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CP06018K
Abstract: We present an environmentally benign aqueous synthesis method to obtain fine tunable layered SnS 2 thin films as well as methods to obtain freestanding nanosheets or transfer to flexible substrates.
Publisher: Springer Science and Business Media LLC
Date: 08-01-2020
DOI: 10.1038/S41467-019-13681-6
Abstract: The relaxation of photoexcited nanosystems is a fundamental process of light–matter interaction. Depending on the couplings of the internal degrees of freedom, relaxation can be ultrafast, converting electronic energy in a few fs, or slow, if the energy is trapped in a metastable state that decouples from its environment. Here, we study helium nanodroplets excited resonantly by femtosecond extreme-ultraviolet (XUV) pulses from a seeded free-electron laser. Despite their superfluid nature, we find that helium nanodroplets in the lowest electronically excited states undergo ultrafast relaxation. By comparing experimental photoelectron spectra with time-dependent density functional theory simulations, we unravel the full relaxation pathway: Following an ultrafast interband transition, a void nanometer-sized bubble forms around the localized excitation (He $${}^{* }$$ * ) within 1 ps. Subsequently, the bubble collapses and releases metastable He $${}^{* }$$ * at the droplet surface. This study highlights the high level of detail achievable in probing the photodynamics of nanosystems using tunable XUV pulses.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Peter Nørby.