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High-Harmonic Generation from Spin-Polarised Defects in Solids
(Nature, 2020-01-31)
The generation of high-order harmonics in gases enabled to probe the attosecond electron dynamics in atoms and molecules with unprecedented resolution. Extending these techniques to solids, which were originally developed ...
Overcoming the Exciton Binding Energy in Two-Dimensional Perovskite Nanoplatelets by Attachment of Conjugated Organic Chromophores
(Nature, 2020-04-20)
In this work we demonstrate a novel approach to achieve efficient charge separation in dimensionally and dielectrically confined two-dimensional perovskite materials. Two-dimensional perovskites generally exhibit large ...
Spin-and Valley-Dependent Transport in Hybrid System and 2D Dirac Materials.
(2020-12-02)
In this thesis, we aim to study the spin- and valley-dependent transport in hybrid system and twodimensionalDirac materials.In the first part, I study some spin-dependent and phase-coherent phenomena in hybrid structures.First, ...
How is silicic acid transported in plants?
(Springer, 2020-11)
Plants accumulate silicon in their tissues as amorphous silica. The form of silicon taken up by plants is silicic acid, a neutral molecule that passes through membrane channels with water. After seminal work on rice ...
Slow Folding of a Helical Protein: Large Barriers, Strong Internal Friction, or a Shallow, Bumpy Landscape?
(American Chemical Society, 2020-10-15)
The rate at which a protein molecule folds is determined by opposing energetic and entropic contributions to the free energy that shape the folding landscape. Delineating the extent to which they impact the diffusional ...
Elucidating the Structure of Ethanol-Producing Active Sites at Oxide-Derived Cu Electrocatalysts
(ACS, 2020-08-21)
The discovery of oxide-derived copper catalysts for CO2 electroreduction is an outstanding advance in the field of electrocatalysis. Their low overpotentials and improved selectivity towards C2 products make them unique. ...
Structure dependency of the atomic-scale mechanisms of platinum electro-oxidation and dissolution
(Springer Nature, 2020-08-24)
Platinum dissolution and restructuring due to surface oxidation are primary degradation mechanisms that limit the lifetime of Pt-based electrocatalysts for electrochemical energy conversion. Here, we studied well-defined ...
Designing water splitting catalysts using rules of thumb: advantages, dangers and alternatives
(RSC, 2020-03-09)
Thermodynamic analysis of the oxygen evolution reaction (OER) hints toward an intrinsic overpotential caused by the nonoptimal adsorption-energy scaling relation between OH and OOH. Consequently, nowadays it is a widely ...
How symmetry factors cause potential- and facet-dependent pathway shifts during CO2 reduction to CH4 on Cu electrodes
(Elsevier, 2020-12-28)
The deactivation of copper electrodes is a serious problem that can affect the scalability and deployment of CO2 electrolyzers. The effect is generally attributed to the cathodic deposition of Fe and Zn impurities from the ...
Enhancing CO2 Electroreduction to Ethanol on Copper-Silver Composites by Opening an Alternative Catalytic Pathway
(ACS, 2020-03-16)
A fundamental question in the electrochemical CO2 reduction reaction (CO2RR) is how to rationally control the catalytic selectivity. For instance, adding a CO-producing metal like Ag to Cu shifts the latter’s CO2RR selectivity ...