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Now showing items 741-750 of 2111
Amorphous 2D-Nanoplatelets of Red Phosphorus Obtained by Liquid-Phase Exfoliation Yield High Areal Capacity Na-Ion Battery Anodes
(2023)
The development of sodium ion batteries will require high-performance elec-trodes with very large areal capacity and reasonable rate performance. Although red phosphorus is a very promising electrode material, it has not ...
Self-assembled arrays of magnetic nanostructures on morphologically patterned semiconductor substrates
(Trinity College (Dublin, Ireland). School of Physics, 2014)
This thesis deals with the formation of morphological patterns on single-crystal semi-conductor surfaces via self-assembly processes, followed by the subsequent fabrication of magnetic nanostructures whose dimensions are ...
Constraining the Presence of Helium in Type Ia Supernovae
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
The aim of this thesis is to investigate the possibility of visible helium features in the near-infrared region of the spectra of Type Ia supernovae, in particular a single feature thought to appear around 10250 ̊A, caused ...
Cooling-field dependence of exchange bias effect in La 0.45Sr0.55MnO3 nanoparticles
(2014)
Magnetic properties of 16 nm La0.45Sr0.55MnO3 nanoparticles exhibit superparamagnetic blocking at 160 K with a ferromagnetic moment appearing in the antiferromagnetic state. The exchange interaction at the interface between ...
Thermodynamic Uncertainty Relations from Exchange Fluctuation Theorems
(2019)
Thermodynamic uncertainty relations (TURs) place strict bounds on the fluctuations of thermodynamic quantities in terms of the associated entropy production. In this Letter, we identify the tightest (and saturable) ...
Enhanced quantum efficiency in mixed donor-acceptor nanocrystal quantum dot monolayers
(2011)
Colloidal nanocrystal quantum dots have attracted interest for use in light-harvesting and emitting devices. One of the key parameters for such applications is the quantum efficiency. Nanocrystal quantum dots exhibit reduced ...
Sampled grating DBR laser as a spectroscopic source in multigas detection at 1.52-1.57um
(2001)
The first application is reported of multigas sensing using a widely tuneable sampled grating DBR laser with a tuning range 1520⩽?⩽1570 nm. The laser diode consists of four independently biased sections, two sampled ...
Numerical investigation of the stability of Ag-Cu nanorods and nanowires
(2008)
Molecular dynamics simulations have been employed to investigate thermally-induced phase separation processes in nanometer-sized Ag50 Cu50 rods and wires. In the absence of concentration gradients, the mechanism underlying ...
The Limit of Spin Lifetime in Solid-State Electronic Spins
(2020)
The development of spin qubits for quantum technologies requires their protection from the main source of finite-temperature decoherence: atomic vibrations. Here we eliminate one of the main barriers to the progress in ...
Lattice distortion effects on the magneto-structural phase transition of MnAs.
(2005)
We present a systematic experimental and theoretical study of the first-order phase transition of epitaxially grown MnAs thin films under biaxial tensile stress. Our results give direct information on the dependence of the ...