Center for Interstellar Catalysis
Department of Physics and Astronomy (IFA)
Aarhus University
Ny Munkegade Build. 1520
DK-8000 Aarhus C
Office: 1520-326
Phone: +45 8715 5584
Email: amc@phys.au.dk
The spontaneously generated electric field in a molecular glass, decays with time at deeply supercooled temperatures. Here, we fit the rate of decay with a model to extract the activation barrier to molecular rotation, as the glass ages.
A molecular glass spontaneously polarises upon growth. The temporal decay of this polarization is directly related to the rotation of molecular dipoles and we use this to track an ageing pathway in a deeply supercooled glassy solid.
Graphene oxide on Ir(111) has a lower freezing onset temperature than pristine graphene on Ir(111).
What do we mean when we describe a film of vacuum-deposited material as amorphous and what by crystalline? In this study of spontaneously electrical solid ammonia, we show that the so-called “amorphous” phase, prepared between 20–50 K, is a crystalline material composed of crystallites containing >64 molecules. More broadly, we introduce a technique to quantify the size of crystallites in nanoscale films.
Proceedings of the International Astronomical Union, 15(S350), 390-391
Corrosion Science Volume 152, 15 May 2019, Pages 1-9
A low temperature, molecular polymerisation recipe generates a graphene coating on an industrial alloy and prevents substrate degradation. The coating reduces corrosion current by two orders of magnitude in acidic conditions.
We present a review discussing the use of graphene as a corrosion prevention technology. Corrosion, the degradation of metals and alloys by chemical and/or electrochemical means, is a great challenge to society, its industries and its citizens, both in terms of economics, safety and health.
J. Phys.: Condens. Matter 31 085001
We demonstrate a procedure for obtaining a H-intercalated graphene layer that is found to be chemically decoupled from the underlying metal substrate.
Mud flats, Fejø, Denmark: a 2D representation of defect-free regions in a molecular crystal that can support Wannier–Mott excitons.
The adsorption of 5-Fluorouracil (5FU) on Au(111) and Cu(111) surfaces as a function of molecular coverage and temperature has been studied, using x-ray photoelectron spectroscopy (XPS) and near-edge x-ray absorption fine structure (NEXAFS) spectroscopy.
Guided by the spontelectric behaviour of thin films of cis-methyl formate, infrared observations and computational investigations reveal the dimer structural motif of the crystalline solid.
O atoms selectivley bind at one type of site on the graphene basal plane, creating a long-range patterned distribution of graphene oxide nano-islands.
Increased interactions at the graphene–metal interface yield an effective prevention of intercalation of foreign species below the graphene cover.
We show that solids displaying spontaneous dipole orientation possess quite general non-local and non-linear characteristics expressed through their internal electric fields.
Hydrogen functionalization of graphene by exposure to vibrationally excited H2 molecules is investigated by combined scanning tunneling microscopy, high-resolution electron energy loss spectroscopy, X-ray photoelectron spectroscopy measurements, and density functional theory calculations.
