Browsing Chemistry (Scholarly Publications) by Author "DUESBERG, GEORG"
Now showing items 1-20 of 27
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Cell Proliferation Tracking Using Graphene Sensor Arrays
DUESBERG, GEORG; HEGNER, MARTIN (2012)The development of a novel label-free graphene sensor array is presented. Detection is based on modification of graphene FET devices and specifically monitoring the change in composition of the nutritive components in ... -
Characterization of graphene-silicon Schottky barrier diodes using impedance spectroscopy
DUESBERG, GEORG; YIM, CHANYOUNG; MCEVOY, NIALL (2013)We investigate the interface characteristics of graphene-silicon Schottky barrier diodes using dc current-voltage measurements and ac impedance spectroscopy (IS). Diode parameters, including the ideality factor and the ... -
Chemically Modulated Graphene Diodes
DUESBERG, GEORG (2013)We report the manufacture of novel graphene diode sensors (GDS), which are composed of monolayer graphene on silicon substrates, allowing exposure to liquids and gases. Parameter changes in the diode can be correlated with ... -
Comparison of carbon nanotube forest growth using AlSi, TiSiN, and TiN as conductive catalyst supports
DUESBERG, GEORG (2014)We evaluate carbon nanotube growth by employing AlSi, TiSiN and TiN as conductive catalyst supports. Using a wide range of chemical vapour deposition conditions, we find that only AlSi and TiSiN yield homogeneously-sized ... -
The Effect of Downstream Plasma Treatments on Graphene Surfaces
DUESBERG, GEORG; KUMAR, SHISHIR; MCEVOY, NIALL; LEE, KANGHO; MCEVOY, NIALL (2012)This paper reports on the effects of growth, transfer and annealing procedures on graphene grown by chemical vapour deposition. A combination of Raman spectroscopy, electrical measurements, atomic force microscopy, and ... -
Electrical properties of high density arrays of silicon nanowire field effect transistors
DUESBERG, GEORG (2013)Proximity effect corrected e-beam lithography of hydrogen silsesquioxane on silicon on insulator was used to fabricate multi-channel silicon nanowire field-effect transistors (SiNW FETs). Arrays of 15-channels with a line ... -
Flexible, Transparent, Conducting Films of Randomly Stacked Graphene from Surfactant-Stabilized, Oxide-Free Graphene Dispersions
DUESBERG, GEORG; COLEMAN, JONATHAN (2010)We have exfoliated graphite in water to give dispersions of mono and few-layer graphene stabilised by surfactant. These dispersions can be used to form thin, disordered films of randomly stacked, oxide-free, few-layer ... -
Functionalization of Liquid-Exfoliated Two-Dimensional 2H-MoS2
DUESBERG, GEORG; COLEMAN, JONATHAN; MCDONALD, AIDAN (2015) -
Gas phase controlled deposition of high quality large-area graphene films
DUESBERG, GEORG; MCEVOY, NIALL; NICOLOSI, VALERIA; BLAU, WERNER (2010)A gas phase controlled graphene synthesis resembling a CVD process that does not critically depend on cooling rates is reported. The controllable catalytic CVD permits high quality large-area graphene formation with deft ... -
Graphene field emission devices
DUESBERG, GEORG (2014)Graphene field emission devices are fabricated using a scalable process. The field enhancement factors, determined from the Fowler-Nordheim plots, are within few hundreds and match the theoretical predictions. The devices ... -
Graphene field emission devices
DUESBERG, GEORG (2014)Graphene field emission devices are fabricated using a scalable process. The field enhancement factors, determined from the Fowler-Nordheim plots, are within few hundreds and match the theoretical predictions. The devices ... -
Growth of high-density carbon nanotube forests on conductive TiSiN supports
DUESBERG, GEORG (2015)e grow vertically aligned carbon nanotube forests on refractory conductive films of TiSiN and achieve area densities of (5.1 ± 0.1) × 1012 tubes cm−2 and mass densities of about 0.3 g cm−3. The TiSiN films act as diffusion ... -
Heterojunction hybrid devices from vapor phase grown MoS 2
DUESBERG, GEORG; YIM, CHANYOUNG; MCEVOY, NIALL (2014)We investigate a vertically-stacked hybrid photodiode consisting of a thin n-type molybdenum disulfide (MoS2) layer transferred onto p-type silicon. The fabrication is scalable as the MoS2 is grown by a controlled and ... -
High-Performance Sensors Based on Molybdenum Disulfide Thin Films
DUESBERG, GEORG; HALLAM, TOBY; MC EVOY, NIALL; GATENSBY, RILEY (2013)High-performance sensors based on molybdenum disulfide (MoS2) grown by sulfurization of sputtered molybdenum layers are presented. Using a simple integration scheme, it is found that the electrical conductivity of MoS2 ... -
Inkjet-defined field-effect transistors from chemical vapour deposited graphene
DUESBERG, GEORG; NOLAN, HUGO; MCEVOY, NIALL; BERNER, NINA; HALLAM, TOBY (2014)In this work, inkjet printing methods are used to create graphene field effect transistors with mobilities up to 3000 cm2 V?1 s?1. A commercially-available chromium-based ink is used to define the device channel by inhibiting ... -
Investigation of the optical properties of MoS2 thin films using spectroscopic ellipsometry
DUESBERG, GEORG; LUNNEY, JAMES; MCEVOY, NIALL; YIM, CHANYOUNG (2014)Spectroscopic ellipsometry (SE) characterization of layered transition metal dichalcogenide (TMD) thin films grown by vapor phase sulfurization is reported. By developing an optical dispersion model, the extinction coefficient ... -
Ion irradiation induced structural and electrical transition in graphene
DUESBERG, GEORG (2010)The relationship between the electrical properties and structure evolution of single layer graphene was studied by gradually introducing the gallium ion irradiation. Raman spectrums show a structural transition from ... -
Magnetoresistance of Fe3O4-graphene-Fe3O4 junctions
DUESBERG, GEORG; WU, HAN-CHUN; WANG, JING; CROSS, GRAHAM; KUMAR, SHISHIR; SHVETS, IGOR (2011)The magnetoresistance (MR) of Fe3O4-graphene-Fe3O4 junctions has been experimentally studied at different temperatures. It is found that a barrier exists at the Fe3O4/graphene interface. The existence of the interfacial ... -
Nitrogen-doped pyrolytic carbon films as highly electrochemically active electrodes
NOLAN, HUGO; DUESBERG, GEORG; MCEVOY, NIALL (2013)Nitrogen-doped Pyrolytic Carbon (N-PyC) films were employed as an electrode material in electrochemical applications. PyC was grown by via non-catalysed chemical vapour deposition and subsequently functionalised via exposure ... -
Origami-based spintronics in graphene
DUESBERG, GEORG; HALLAM, TOBY; FERREIRA, MAURO (2013)We show that periodically folded graphene sheets with enhanced spin-orbit interaction due to curvature effects can carry spin-polarized currents and have gaps in the electronic spectrum in the presence of weak magnetic ...