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Duncan Thomas Lindsay Alexander

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Related publications (73)

Page 3 of 4

Height-resolved quantification of microstructure and texture in polycrystalline thin films using TEM orientation mapping

Cécile Hébert, Duncan Thomas Lindsay Alexander, Arthur Brian Aebersold

A method is presented for the quantitative investigation of microstructure and texture evolution in polycrystalline thin films based on in-plane automated crystal orientation mapping in transmission electron microscopy, from the substrate up. To demonstrat ...

Elsevier Science Bv2015

Investigation of the Impact of Point Defects in InGaN/GaN Quantum Wells with High Dislocation Densities

Davide Maria Di Paola, Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Duncan Thomas Lindsay Alexander, Danxuan Chen, Thomas Fjord Kjaersgaard Weatherley, Pierre Christophe Lottigier

In this work, we report on the efficiency of single InGaN/GaN quantum wells (QWs) grown on thin (

MDPI2023

La@C82 as a spin-active filling of SWCNTs: ESR study of magnetic and photophysical properties

László Forró, Arnaud Magrez, Duncan Thomas Lindsay Alexander, Andrzej Sienkiewicz, Bálint Náfrádi, Katarzyna Pierzchala, Luka Ciric

Electron microscopy (TEM) and electron spin resonance ESR) were applied to characterize lanthanum metallofullerene(La@C82)-filled peapods. The peapods were prepared by encapsulation of La@C82 in SWCNTs, which were obtained by laser ablation technique in th ...

2008

The electro-deoxidation of dense titanium dioxide precursors in molten calcium chloride giving a new reaction pathway

Duncan Thomas Lindsay Alexander

A new study is presented on the electro-deoxidation of porous TiO2 precursors in molten calcium chlo- ride electrolytes. It is shown that by reducing precursor open porosity from standard values of ≥25% to ∼11–12%, such that there is insufficient free volu ...

Elsevier2011

Chemically pure beta-tricalcium phosphate powders: Evidence of two crystal structures

Paul Bowen, Duncan Thomas Lindsay Alexander, Gabrielle Anne Laguisma Sblendorio

The question whether beta-tricalcium phosphate (beta-TCP) can form a solid solution with beta-calcium pyrophosphate (beta-CPP) and/or hydroxyapatite (HA) has still not been solved. For this reason, wet-chemically synthesized beta-TCP powders with only 20 p ...

ELSEVIER SCI LTD2021

Triplet grain growth in a-texture polycrystalline ZnO thin films

Cécile Hébert, Duncan Thomas Lindsay Alexander, Arthur Brian Aebersold

A growth of grain triplets is identified in vapor deposited, a-texture polycrystalline zinc oxide thin films, using a combination of transmission electron microscopy-based automated crystal orientation mapping and high-resolution imaging. Each triplet cons ...

2020

Near-Field Mapping of Photonic Eigenmodes in Patterned Silicon Nanocavities by Electron Energy-Loss Spectroscopy

Duncan Thomas Lindsay Alexander, Valentin Flauraud

Recently, there has been significant interest in using dielectric nanocavities for the controlled scattering of light, owing to the diverse electromagnetic modes that they support. For plasmonic systems, electron energy-loss spectroscopy (EELS) is now an e ...

2021

Cathodoluminescence in a (S)TEM – Exploring Possibilities and Limits

Pierre Stadelmann, Cécile Hébert, Duncan Thomas Lindsay Alexander, Anas Mouti

Cambridge, Cambridge University Press2010

Imaging Nonradiative Point Defects Buried in Quantum Wells Using Cathodoluminescence

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Duncan Thomas Lindsay Alexander, Wei Liu, Wei Liu, Thomas Fjord Kjaersgaard Weatherley

Crystallographic point defects (PDs) can dramatically decrease the efficiency of optoelectronic semiconductor devices, many of which are based on quantum well (QW) heterostructures. However, spatially resolving individual nonradiative PDs buried in such QW ...

AMER CHEMICAL SOC2021

Centimeter-Sized Single-Orientation Monolayer Hexagonal Boron Nitride With or Without Nanovoids

Aleksandra Radenovic, Duncan Thomas Lindsay Alexander, Ke Liu, Huanyao Cun

American Chemical Society (ACS)2018

Low-temperature plasma-deposited silicon epitaxial films: Growth and properties

Christophe Ballif, Stefaan De Wolf, Duncan Thomas Lindsay Alexander, Quentin Thomas Jeangros, Johannes Peter Seif, Bénédicte Demaurex

Low-temperature (

American Institute of Physics2014

Protein Corona: Impact of Lymph Versus Blood in a Complex In Vitro Environment

Heinrich Hofmann, Duncan Thomas Lindsay Alexander, Marc Moniatte, Marijana Mionic Ebersold, Débora Bonvin, Ulrich Aschauer, Diego Chiappe

In biological environments, the surface of nanoparticles (NPs) are modified by protein corona (PC) that determines their biological behavior. Unfortunately, in vitro tests still give different PC than in vivo tests causing in vitro-in vivo discrepancy; hen ...

Wiley-Blackwell2017

A Multiscale Bayesian Approach to Quantification and Denoising of Energy-dispersive X-ray Data

Cécile Hébert, Duncan Thomas Lindsay Alexander, Pau Torruella Besa

Energy dispersive x-ray (EDX) spectrum imaging yields compositional information with a spatial resolution down to the atomic level. However, experimental limitations often produce extremely sparse and noisy EDX spectra. Under such conditions, every detecte ...

IOP Publishing Ltd2025

Ultrathin MoS2 membranes and their characterization through HRTEM and electron diffraction studies

Andras Kis, Duncan Thomas Lindsay Alexander, Jacopo Brivio

Cambridge, Cambridge University Press2012

CsPbBr3 QD/AlOx inorganic nanocomposites with exceptional stability in water, light and heat

Raffaella Buonsanti, Emad Oveisi, Duncan Thomas Lindsay Alexander, Anna Loiudice, Seryio Saris

Herein, the assembly of CsPbBr3 QD/AlOx inorganic nanocomposites, by using atomic layer deposition (ALD) for the growth of the amorphous alumina matrix (AlOx), is described as a novel protection scheme for such QDs. The nucleation and growth of AlOx on the ...

2017

Crossover between distinct symmetries in solid solutions of rare earth nickelates

Duncan Thomas Lindsay Alexander, Bernat Mundet

A strong coupling of the lattice to functional properties is observed in many transition metal oxide systems, such as the ABO(3) perovskites. In the quest for tailor-made materials, it is essential to be able to control the structural properties of the com ...

2021

Quantitative imaging of flux vortices in the type-II superconductor MgB2 using cryo-Lorentz transmission electron microscopy

Cécile Hébert, Marco Cantoni, Fabrizio Carbone, Duncan Thomas Lindsay Alexander, Mathieu Julien Gino Cottet

Imaging of flux vortices in high quality MgB2 single crystals has been successfully performed in a commercial field-emission gun-based transmission electron microscope. In cryo-Lorentz microscopy, the sample quality and the vortex lattice can be monitored ...

Amer Physical Soc2013

Length scales of interfacial coupling between metal and insulator phases in oxides

Duncan Thomas Lindsay Alexander, Bernat Mundet

The characteristic length scale and mechanism of the metal-insulator transition in nickelate superlattices is addressed, with implications for the design of oxide electronics. ...

NATURE PUBLISHING GROUP2020

Leveraging Machine Learning for Advanced Nanoscale X-ray Analysis: Unmixing Multicomponent Signals and Enhancing Chemical Quantification

Cécile Hébert, Duncan Thomas Lindsay Alexander

Energy dispersive X-ray (EDX) spectroscopy in the transmission electron microscope is a key tool for nanomaterials analysis, providing a direct link between spatial and chemical information. However, using it for precisely determining chemical compositions ...

American Chemical Society (ACS)2024

Preparation of homogeneous titania coating on the surface of MWNT

László Forró, Duncan Thomas Lindsay Alexander, Jin Won Seo

Preparation of homogeneous and stable inorganic coatings on the surface of multi-wall carbon nanotubes (CNTs) was studied. Precursor compounds such as titanium (IV) bromide and titanium (IV) chloride were used to cover the surface of CNTs under either solv ...

Elsevier2011