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Telluride nanocrystals with adjustable amorphous shell thickness and core-shell structure modulation by aqueous cation-exchange
Xinyuan Li, Mengyao Su, Yi-Chi Wang +4
Engineering the structure of core-shell colloidal semiconductor nanoparticles (CSNPs) is attractive due to the potential to enhance photo-induced charge transfer (PICT) and induce…
Tracking single atoms in a liquid environment
Nicholas Clark, Daniel J. Kelly, Mingwei Zhou +7
The chemical behaviour of single metal atoms largely depends on the local coordination environment, including interactions with the substrate and with the surrounding gas or liquid…
Oleylamine aging of PtNi nanoparticles giving enhanced functionality for the oxygen reduction reaction
Gerard M Leteba, Yi-Chi Wang, Thomas J A Slater +10
We report a rapid solution-phase strategy to synthesize alloyed PtNi nanoparticles which demonstrate outstanding functionality for the oxygen reduction reaction (ORR). This one-pot…
Ion exchange in atomically thin clays and micas
Yi-Chao Zou, Lucas Mogg, Nick Clark +13
Clays and micas are receiving attention as materials that, in their atomically thin form, could allow for novel proton conductive, ion selective, osmotic power generation, or solve…
Iron-silica interaction during reduction of precipitated silica-promoted iron oxides using in situ XRD and TEM
M. J. Coombes, E. J. Olivier, E. Prestat +3
The effect of silica-promotion on the reduction of iron oxides in hydrogen was investigated using in situ X-ray diffraction and aberration-corrected transmission electron microscop…
Atomic Resolution Imaging of CrBr using Adhesion-Enhanced Grids
Matthew J. Hamer, David G. Hopkinson, Nick Clark +7
Suspended specimens of 2D crystals and their heterostructures are required for a range of studies including transmission electron microscopy (TEM), optical transmission experiments…
Two-dimensional covalent crystals by chemical conversion of thin van der Waals materials
Vishnu Sreepal, Mehmet Yagmurcukardes, Kalangi S. Vasu +14
Most of the studied two-dimensional (2D) materials have been obtained by exfoliation of van der Waals crystals. Recently, there has been growing interest in fabricating synthetic 2…
Indirect to direct gap crossover in two-dimensional InSe revealed by ARPES
Matthew Hamer, Johanna Zultak, Anastasia V. Tyurnina +16
Atomically thin films of III-VI post-transition metal chalcogenides (InSe and GaSe) form an interesting class of two-dimensional semiconductor that feature strong variations of the…
Nanometer Resolution Elemental Mapping in Graphene-based TEM Liquid Cells
Daniel J. Kelly, Mingwei Zhou, Nick Clark +5
We demonstrate a new design of graphene liquid cell consisting of a thin lithographically patterned hexagonal boron nitride crystal encapsulated from both sides with graphene windo…
Tuneable Sieving of Ions Using Graphene Oxide Membranes
J. Abraham, K. S. Vasu, C. D. Williams +10
Graphene oxide membranes show exceptional molecular permeation properties, with a promise for many applications. However, their use in ion sieving and desalination technologies is…
Molecular transport through capillaries made with atomic-scale precision
B. Radha, A. Esfandiar, F. C. Wang +13
Nanometre-scale pores and capillaries have long been studied because of their importance in many natural phenomena and their use in numerous applications. A more recent development…
Van der Waals pressure and its effect on trapped interlayer molecules
K. S. Vasu, E. Prestat, J. Abraham +9
Van der Waals assembly of two-dimensional (2D) crystals continue attract intense interest due to the prospect of designing novel materials with on-demand properties. One of the uni…
An in- and ex-situ TEM study into the oxidisation of titanium (IV) sulphide
Edmund Long, Sean O'Brien, Edward A. Lewis +6
The degradation of liquid dispersed titanium (IV) sulphide (TiS) is studied from the point of view of oxidisation. TiS is a layered two-dimensional nanomaterial, with poten…
Heterostructures produced from nanosheet-based inks
F. Withers, H. Yang, L. Britnell +13
The new paradigm of heterostructures based on two-dimensional (2D) atomic crystals has already led to the observation of exciting physical phenomena and creation of novel devices.…
Optimized conditions for direct imaging of bonding charge density in electron microscopy
James Ciston, Sarah J. Haigh, Judy S. Kim +2
We report on the observability of valence bonding effects in aberration-corrected high resolution electron microscopy (HREM) images along the [010] projection of the mineral Forste…