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Light emission properties of mechanical exfoliation induced extended defects in hexagonal boron nitride flakes

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Chalcogen vacancies are generally considered to be the most common point defects in transition metal dichalcogenide (TMD) semiconductors because of their low formation energy in vacuum and their frequent observation in transmission electron microscopy stud ...

Springer2019

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We demonstrate a novel method for fabricating single crystal diamond diffraction gratings based on crystallographic etching that yields high-quality diffraction gratings from commercially available diamond plates. Both V-groove and rectangular gratin ...

2019

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Few-layer graphene (FLG) has recently been intensively investigated for its variable electronic properties, which are defined by a local atomic arrangement. While the most natural arrangement of layers in FLG is ABA (Bernal) stacking, a metastable ABC (rho ...

HIGHER EDUCATION PRESS2019

Facile Production of Hexagonal Boron Nitride Nanoparticles by Cryogenic Exfoliation

Aleksandra Radenovic, Vytautas Navikas, Evgenii Glushkov, Andrey Chernev, Jean Camille Benjamin Comtet

Fluorescent nanoparticles with optically robust luminescence are imperative to applications in imaging and labeling. Here we demonstrate that hexagonal boron nitride (hBN) nanoparticles can be reliably produced using a scalable cryogenic exfoliation techni ...

AMER CHEMICAL SOC2019

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Metals are known to exhibit mechanical behaviour at the nanoscale different to bulk samples. This transition typically initiates at the micrometre scale, yet existing techniques to produce micrometre-sized samples often introduce artefacts that can influen ...

Nature Publishing Group2017

Luciferases with tunable emission wavelengths

Kai Johnsson, Luc Reymond, Rudolf Griss, Alberto Schena, Qiuliyang Yu, Olivier Vincent Sallin, Lin Xue, Julien Hiblot, Nicholas Clarke Hill, Marina Daniela Beatrice Sabbadini

We introduce luciferases whose emission maxima can be tuned to different wavelengths by chemical labeling. These tunable luciferases are generated by inserting the small luciferase NanoLuc into the structures of the self-labeling proteins SNAP-tag or HaloT ...

Wiley-Blackwell2017

We report on a detailed study of the intensity dependent optical properties of individual GaN/AlN quantum disks (QDisks) embedded into GaN nanowires (NW). The structural and optical properties of the QDisks were probed by high spatial resolution cathodolum ...

Amer Physical Soc2016

Giant apparent lattice distortions in STM images of corrugated sp2-hybridised monolayers

Alfredo Pasquarello, Harald Brune, François Patthey, Stefano Rusponi, Markus Etzkorn, Donat Fabian Natterer, Anne Lehnert, Quentin Dubout, Laurent Claude

We report on the strengths and limitations of scanning tunnelling microscopy (STM) when used for characterising atomic-scale features of quasi two-dimensional materials, such as graphene and single layers of hexagonal boron nitride, which may present stron ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2016

Magnetoexcitons in large area CVD-grown monolayer MoS2 and MoSe2 on sapphire

Andras Kis, Dumitru Dumcenco, Alessandro Surrente

Magnetotransmission spectroscopy was employed to study the valley Zeeman effect in large area monolayer MoS2 and MoSe2. The extracted values of the valley g factors for both A and B excitons were found to be similar with g(v) similar or equal to -4.5. The ...

Amer Physical Soc2016

Large-area MoS2 grown using H2S as the sulphur source

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

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