Duncan Thomas Lindsay Alexander

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Publications associées (73)

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Amorphous/crystalline silicon interface defects induced by hydrogen plasma treatments

Christophe Ballif, Duncan Thomas Lindsay Alexander, Stefaan De Wolf, Jonas Geissbühler, Johannes Peter Seif, Loris Barraud, Bénédicte Demaurex

Excellent amorphous/crystalline silicon interface passivation is of extreme importance for high-efficiency silicon heterojunction solar cells. This can be obtained by inserting hydrogen-plasma treatments during deposition of the amorphous silicon passivati ...

American Institute of Physics2013

Efficient cleavage of aryl ether C–O linkages by Rh–Ni and Ru–Ni nanoscale catalysts operating in water

Paul Joseph Dyson, Vassily Hatzimanikatis, Duncan Thomas Lindsay Alexander, Ning Yan, Georgios Savoglidis, Antoine Philippe Van Muyden, Sviatlana Siankevich, Safak Bulut

Bimetallic Ru–Ni and Rh–Ni nanocatalysts coated with a phase transfer agent efficiently cleave aryl ether C–O linkages in water in the presence of hydrogen. For dimeric substrates with weaker C–O linkages, i.e. α-O-4 and β-O-4 bonds, low loadings of the pr ...

2018

Metal-insulator transition in composition-tuned nickel oxide films

Duncan Thomas Lindsay Alexander, Bernat Mundet

Thin films of the solid solution Nd1-xLaxNiO3 are grown in order to study the expected 0 K phase transitions at a specific composition. We experimentally map out the structural, electronic and magnetic properties as a function of x and a discontinuous, pos ...

IOP Publishing Ltd2023

Large-area MoS2 grown using H2S as the sulphur source

Philippe Gillet, Aleksandra Radenovic, Andras Kis, Duncan Thomas Lindsay Alexander, Dumitru Dumcenco, Dmitry Ovchinnikov, Oriol López Sánchez

We report on the growth of molybdenum disulphide (MoS2) using H2S as a gas-phase sulfur precursor that allows controlling the domain growth direction of domains in both vertical (perpendicular to the substrate plane) and horizontal (within the substrate pl ...

2015

A novel platinum nanocatalyst for the oxidation of 5-Hydroxymethylfurfural into 2,5-Furandicarboxylic acid under mild conditions

Paul Joseph Dyson, Gabor Laurenczy, Zhaofu Fei, Duncan Thomas Lindsay Alexander, Ning Yan, Georgios Savoglidis, Sviatlana Siankevich

5-Hydroxymethylfurfural (HMF) is a key intermediate obtainable from various cellulosic (biomass) derivatives, but it must be converted to other chemicals such as 2,5-Furandicarboxylic acid (FDCA) for direct use. FDCA is an important derivative of HMF as it ...

Academic Press Inc Elsevier Science2014

Electronic Coupling of Metal-to-Insulator Transitions in Nickelate-Based Heterostructures

Duncan Thomas Lindsay Alexander, Bernat Mundet

In rare earth nickelates, the metal-to-insulator transition observed as a function of temperature can be described using an electronic and a structural order parameter. The electronic one is linked to the electronic disproportionation observed below the tr ...

WILEY2023

Structural study of nickelate based heterostructures

Duncan Thomas Lindsay Alexander, Bernat Mundet, Chih-Ying Hsu

Heterostructures consisting of SmNiO3 and NdNiO3 alternating layers with additional LaAlO3 spacer layers were grown and fully characterized by means of x-ray diffraction, atomic force microscopy, and scanning transmission electron microscopy. A change in t ...

Aip Publishing2024

Nanoscale Analysis by EFTEM and FIB-Tomography for Optimization of Thin-Film Silicon Solar Cells

Christophe Ballif, Marco Cantoni, Sylvain Nicolay, Duncan Thomas Lindsay Alexander, Peter Cuony

Cambridge, Cambridge University Press2010

A Cobalt-Iron Double-Atom Catalyst for the Oxygen Evolution Reaction

Xile Hu, Duncan Thomas Lindsay Alexander, Lichen Bai

Single-atom catalysts exhibit well-defined active sites and potentially maximum atomic efficiency. However, they are unsuitable for reactions that benefit from bimetallic promotion such as the oxygen evolution reaction (OER) in an alkaline medium. Here we ...

2019

Properties of helium bubbles in covalent systems at the nanoscale: A combined numerical and experimental study

Cécile Hébert, Duncan Thomas Lindsay Alexander

The properties of nanometric-sized helium bubbles in silicon have been investigated using both spatially resolved electron-energy-loss spectroscopy combined with a recently developed method, and molecular-dynamics simulations. The experiments allowed for a ...

Amer Physical Soc2017

Cathodoluminescence Mapping of Cherenkov-Radiation Generated Bloch-Modes in Planar Photonic Crystals by Fast Electrons

Romuald Houdré, Cécile Hébert, Marco Cantoni, Duncan Thomas Lindsay Alexander, Nicolas Le Thomas, Simon Schneider

Cambridge, Cambridge University Press2010

Nanoscale topographical control of capillary assembly of nanoparticles

Olivier Martin, Jürgen Brugger, Duncan Thomas Lindsay Alexander, Jérémy Butet, Valentin Flauraud, Massimo Mastrangeli, Gabriel David Bernasconi, Elmira Shahrabi

Predetermined and selective placement of nanoparticles onto large-area substrates with nanometre-scale precision is essential to harness the unique properties of nanoparticle assemblies, in particular for functional optical and electro-optical nanodevices. ...

2017

Gentle quantitative measurement of helium density in nanobubbles in silicon by spectrum imaging

Cécile Hébert, Duncan Thomas Lindsay Alexander, Guillaume Lucas

We propose an original method for the determination of the physical properties of nanometer sized helium bubbles using spectrum imaging in an energy-filtered transmission electron microscope. Helium bubbles synthesized by high fluence implantation and ther ...

Pergamon-Elsevier Science Ltd2015