Browsing by Author "Duesberg, Georg"
Now showing items 1-20 of 54
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Calibration of Nonstationary Gas Sensors Based on Two-Dimensional Materials
Duesberg, Georg (2020)Two-dimensional materials (2DMs) have high potential in gas sensing, due to their large surface-to-volume ratio. However, most sensors based on 2DMs suffer from the lack of a steady state during gas exposure, hampering ... -
Defect Engineering of Two-Dimensional Molybdenum Disulfide
Duesberg, Georg (2020)Two-dimensional (2D) molybdenum disulfide (MoS2) holds great promise in electronic and optoelectronic applications owing to its unique structure and intriguing properties. The intrinsic defects such as sulfur vacancies ... -
Defect sizing, separation, and substrate effects in ion-irradiated monolayer two-dimensional materials
Duesberg, Georg; Mc Evoy, Niall; Zhang, Hongzhou (2018) -
Dependence of Photocurrent Enhancements in Hybrid Quantum Dot-MoS2 Devices on Quantum Dot Emission Wavelength
Bradley, Louise; Mc Evoy, Niall; Mc Closkey, David; Duesberg, Georg (2019)The spectral dependence of nonradiative energy transfer (NRET) from three spectrally different quantum dot (QD) ensembles to monolayer MoS2 is reported. The QDs with peak emission wavelengths of 450, 530, and 630 nm induce ... -
Dependence of Photocurrent Enhancements in Quantum Dot (QD)-Sensitized MoS2 Devices on MoS2 Film Properties
Mc Evoy, Niall; Coleman, Jonathan; Mc Closkey, David; Bradley, Louise; Duesberg, Georg (2018)This report demonstrates highly efficient nonradiative energy transfer (NRET) from alloyed CdSeS/ZnS semiconductor nanocrystal quantum dots (QDs) to MoS2 films of varying layer thicknesses, including pristine monolayers, ... -
Edge and confinement effects allow in situ measurement of size and thickness of liquid-exfoliated nanosheets
Mc Closkey, David; Nicolosi, Valeria; Duesberg, Georg; Donegan, John; Mc Evoy, Niall; Coleman, Jonathan (2014)Two-dimensional nanomaterials such as MoS2 are of great interest both because of their novel physical properties and their applications potential. Liquid exfoliation, an important production method, is limited by our ... -
Electrical devices from top-down structured platinum diselenide films
Duesberg, Georg (2018)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 approaching monolayer thickness and has ... -
Electroanalytical Sensing Properties of Pristine and Functionalized Multilayer Graphene
Duesberg, Georg; Mc Evoy, Niall (2014)This paper describes the heterogeneous electron transfer (ET) properties of high-quality multilayer graphene (MLG) films grown using chemical vapor deposition (CVD) on nickel and transferred to insulating poly(ethylene ... -
Electrochromic nickel oxide films for smart window applications
Lyons, Michael; Colavita, Paula; Duesberg, Georg; Browne, Michelle (2016)In this study, nickel oxide films were prepared through an electrodeposition technique. NiO films were fabricated on Indium Tin Oxide (ITO) supports by cycling the potential between two different sets of limits. The ... -
Electronic and structural characterisation of polycrystalline platinum disulfide thin films
Zhussupbekova, Ainur; Duesberg, Georg; Shvets, Igor (2020)We employ a combination of scanning tunnelling microscopy (STM) and scanning tunnelling spectroscopy (STS) to investigate the properties of layered PtS2, synthesised via thermally assisted conversion (TAC) of a metallic ... -
Enhanced photoresponse of graphene oxide functionalised SnSe films
Duesberg, Georg (2018) -
Enhancing the electrical properties of MoS2 through nonradiative energy transfer
Mc Evoy, Niall; Duesberg, Georg; Bradley, Louise (2017)In this study highly efficient nonradiative energy transfer from semiconductor quantum dots to monolayer MoS 2 with an efficiency of ~99% is demonstrated. Although the energy transfer efficiency is close to unity, there ... -
Few-Layer MoS2/a-Si:H Heterojunction Pin-Photodiodes for Extended Infrared Detection
Mc Evoy, Niall; Duesberg, Georg (2019)Few-layer molybdenum disulfide (FL-MoS2) films have been integrated into amorphous silicon (a-Si:H) pin-photodetectors. To achieve this, vertical a-Si:H photodiodes were grown by plasma-enhanced chemical vapor deposition ... -
Functionalization of Two-Dimensional MoS2: On the Reaction between MoS2 and Organic Thiols
McDonald, Aidan; Duesberg, Georg (2016) -
The goldilocks electrolyte: examining the performance of iron/nickel oxide thin films as catalysts for electrochemical water splitting in various aqueous NaOH solutions
Colavita, Paula; Duesberg, Georg; Browne, Michelle (2016)A rigorous study of electrodeposited pure and mixed Ni/Fe oxides was performed in three different sodium hydroxide electrolytes with various Fe impurity concentrations (<1 ppb, 5 ppb and 102 ppb). The presence and concentration ... -
Grain boundary-mediated nanopores in molybdenum disulfide grown by chemical vapor deposition
Duesberg, Georg; Mc Evoy, Niall (Royal Society of Chemistry, 2017)Molybdenum disulfide (MoS2) is a particularly interesting member of the family of two-dimensional (2D) materials due to its semiconducting and tunable electronic properties. Currently, the most reliable method for obtaining ... -
Graphene : synthesis and applications
Kumar, Shishir (Trinity College (Dublin, Ireland). School of Chemistry, 2012)Carbon is ubiquitous around us and has been studied extensively, yet it has never failed to surprise us. One of its isomers, graphene was discovered only recently and it was supposed not to exist in free form. Graphene is ... -
Growth of 1T′ MoTe2 by Thermally Assisted Conversion of Electrodeposited Tellurium Films
MC MANUS, JOHN BRENDAN; Mc Evoy, Niall; Duesberg, Georg; Shvets, Igor (2019)Molybdenum ditelluride (MoTe2) is a transition metal dichalcogenide (TMD) which has two phases stable under ambient conditions, a semiconducting (2H) and semimetallic (1T′) phase. Despite a host of interesting properties ... -
Helium ion microscope generated nitrogen-vacancy centres in type Ib diamond
Zhang, Hongzhou; Mc Closkey, David; Duesberg, Georg; Donegan, John; Mc Evoy, Niall; Cross, Graham (2014)We report on position and density control of nitrogen-vacancy (NV) centres created in type Ib diamond using localised exposure from a helium ion microscope and subsequent annealing. Spatial control to <380 nm has been ... -
Highly Selective Non-Covalent On-Chip Functionalization of Layered Materials
Duesberg, Georg; Mc Evoy, Niall (2021)Non-covalent functionalization of layered 2D materials is an essential tool to modify and fully harness their optical, electrical, and chemical properties. Herein, a facile method enabling the selective formation of ...