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Metal-Organic Chemical Vapor Deposition of PtSe2
Maximilian Prechtl, Marc Busch, Oliver Hartwig +8
Platinum diselenide (PtSe2), a novel two-dimensional material from the class of noble-metal dichalcogenide (NMD), has recently received significant attention due to its outstanding…
Post-Synthetic Treatment of Nickel-Iron Layered Double Hydroxides for the Optimum Catalysis of the Oxygen Evolution Reaction
Daire Tyndall, Sonia Jaskaniec, Brian Shortall +8
Nickel-iron layered double hydroxide (NiFe LDH) platelets with high morphological regularity and sub-micrometre lateral dimensions were synthesized using a homogeneous precipitatio…
Stacking polymorphism in PtSe drastically affects its electromechanical properties
Roman Kempt, Sebastian Lukas, Oliver Hartwig +8
PtSe is one of the most promising materials for the next generation of piezoresistive sensors. However, the large-scale synthesis of homogeneous thin films with reproducible el…
Synthesis and thermal stability of TMD thin films: A comprehensive XPS and Raman study
Conor P. Cullen, Oliver Hartwig, Cormac Ó Coileáin +5
Transition metal dichalcogenides (TMDs) have been a core constituent of 2D material research throughout the last decade. Over this time, research focus has progressively shifted fr…
Correlating Nanocrystalline Structure with Electronic Properties in 2D Platinum Diselenide
Sebastian Lukas, Oliver Hartwig, Maximilian Prechtl +8
Platinum diselenide (PtSe) is a two-dimensional (2D) material with outstanding electronic and piezoresistive properties. The material can be grown at low temperatures in a sc…
Synthesis and characterisation of thin-film platinum disulfide and platinum sulfide
Conor P. Cullen, Cormac Ó Coileáin, John B. McManus +4
Group-10 transition metal dichalcogenides (TMDs) are rising in prominence within the highly innovative field of 2D materials. While PtS2 has been investigated for potential electro…
Synthesis of WTe2 thin films and highly-crystalline nanobelts from pre-deposited reactants
John B. Mc Manus, Cansu Ilhan, Bastien Balsamo +10
Tungsten ditelluride is a layered transition metal dichalcogenide (TMD) that has attracted increasing research interest in recent years. WTe2 has demonstrated large non-saturating…
Low-temperature synthesis and electrocatalytic application of large-area PtTe2 thin films
John B. Mc Manus, Dominik V. Horvath, Michelle P. Browne +10
The synthesis of transition metal dichalcogenides (TMDs) has been a primary focus for 2D nanomaterial research over the last 10 years, however, only a small fraction of this resear…
Perforating freestanding molybdenum disulfide monolayers with highly charged ions
Roland Kozubek, Mukesh Tripathi, Mahdi Ghorbani-Asl +12
Porous single layer molybdenum disulfide (MoS) is a promising material for applications such as DNA sequencing and water desalination. In this work, we introduce irradiation wi…
Defect-Moderated Oxidative Etching of MoS2
Pierce Maguire, Jakub Jadwiszczak, Maria O'Brien +4
We report a simple technique for the selective etching of bilayer and monolayer MoS. In this work, chosen regions of MoS were activated for oxygen adsorption and reaction b…
Suppression of the Shear Raman Mode in Defective Bilayer MoS2
Pierce Maguire, Clive Downing, Jakub Jadwiszczak +7
We investigate the effects of lattice disorders on the low frequency Raman spectra of bilayer MoS2. The bilayer MoS2 was subjected to defect engineering by irradiation with a 30 ke…
Neuromorphic MoS2 memtransistors fabricated by localised helium ion beam irradiation
Jakub Jadwiszczak, Darragh Keane, Pierce Maguire +12
Two-dimensional layered semiconductors have recently emerged as attractive building blocks for next-generation low-power non-volatile memories. However, challenges remain in the co…
Highly sensitive electromechanical piezoresistive pressure sensors based on large-area layered PtSe films
Stefan Wagner, Chanyoung Yim, Niall McEvoy +8
Two-dimensional (2D) layered materials are ideal for micro- and nanoelectromechanical systems (MEMS/NEMS) due to their ultimate thinness. Platinum diselenide (PtSe), an excit…
Electrical characterization of structured platinum diselenide devices
Chanyoung Yim, Vikram Passi, Max C. Lemme +4
Platinum diselenide (PtSe2) is an exciting new member of the two-dimensional (2D) transition metal dichalcogenide (TMD) family. it has a semimetal to semiconductor transition when…
Defect Sizing, Separation and Substrate Effects in Ion-Irradiated Monolayer 2D Materials
Pierce Maguire, Daniel S. Fox, Yangbo Zhou +8
Precise and scalable defect engineering of 2D nanomaterials is acutely sought-after in contemporary materials science. Here we present defect engineering in monolayer graphene and…
Oxide-mediated self-limiting recovery of field effect mobility in plasma-treated MoS
Jakub Jadwiszczak, Colin O'Callaghan, Yangbo Zhou +14
Precise tunability of electronic properties of 2D nanomaterials is a key goal of current research in this field of materials science. Chemical modification of layered transition me…
Grain boundary-mediated nanopores in molybdenum disulfide grown by chemical vapor deposition
Kenan Elibol, Toma Susi, Maria O'Brien +6
Molybdenum disulfide (MoS2) is a particularly interesting member of the family of two-dimensional (2D) materials due to its semiconducting and tunable electronic properties. Curren…
High-performance hybrid electronic devices from layered PtSe2 films grown at low temperature
Chanyoung Yim, Kangho Lee, Niall McEvoy +8
Layered two-dimensional (2D) materials display great potential for a range of applications, particularly in electronics. We report the large-scale synthesis of thin films of platin…
Raman Characterization of Platinum Diselenide Thin Films
Maria O'Brien, Niall McEvoy, Carlo Motta +12
Platinum diselenide (PtSe2) is a newly discovered 2D material which is of great interest for applications in electronics and catalysis. PtSe2 films were synthesized by thermally-as…
Mapping of Low-Frequency Raman Modes in CVD-Grown Transition Metal Dichalcogenides: Layer Number, Stacking Orientation and Resonant Effects
Maria OBrien, Niall McEvoy, Damien Hanlon +3
Layered inorganic materials, such as the transition metal dichalcogenides (TMDs), have attracted much attention due to their exceptional electronic and optical properties. Reliable…
Low wavenumber Raman spectroscopy of highly crystalline MoSe2 grown by chemical vapor deposition
Maria O'Brien, Niall McEvoy, Damien Hanlon +4
Transition metal dichalcogenides (TMDs) have recently attracted attention due to their interesting electronic and optical properties. Fabrication of these materials in a reliable a…
Heterojunction Hybrid Devices from Vapor Phase Grown MoS
Chanyoung Yim, Maria O`Brien, Niall McEvoy +9
We investigate a vertically-stacked hybrid photodiode consisting of a thin n-type molybdenum disulfide (MoS) layer transferred onto p-type silicon. The fabrication is scalabl…
Liquid phase production of graphene by exfoliation of graphite in surfactant/water solutions
Y Hernandez, M Lotya, V Nicolosi +4
We have demonstrated a method to disperse and exfoliate graphite to give graphene suspended in water-surfactant solutions. Optical characterisation of these suspensions allowed the…
High yield production of graphene by liquid phase exfoliation of graphite
Y. Hernandez, V. Nicolosi, M. Lotya +16
Graphene is at the centre of nanotechnology research. In order to fully exploit its outstanding properties, a mass production method is necessary. Two main routes are possible: lar…