All Outputs (18)

Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO<inf>2</inf> Nanoparticles Film (2024)
Journal Article
Ibrahem, M. A., Verrelli, E., Adawi, A. M., Bouillard, J. S. G., & O’Neill, M. (2024). Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO2 Nanoparticles Film. ACS Omega, 9(9), 10169–10176. https://doi.org/10.1021/acsomega.3c06932

The coupling between sub-bandgap defect states and surface plasmon resonances in Au nanoparticles and its effects on the photoconductivity performance of TiO2 are investigated in both the ultraviolet (UV) and visible spectrum. Incorporating a 2 nm go... Read More about Plasmons Enhancing Sub-Bandgap Photoconductivity in TiO<inf>2</inf> Nanoparticles Film.

Persistent near-infrared photoconductivity of ZnO nanoparticles based on plasmonic hot charge carriers (2022)
Journal Article
Ibrahem, M. A., Verrelli, E., Cheng, F., Adawi, A. M., Bouillard, J. S. G., & O'Neill, M. (2022). Persistent near-infrared photoconductivity of ZnO nanoparticles based on plasmonic hot charge carriers. Journal of applied physics, 131(10), Article 103103. https://doi.org/10.1063/5.0079006

We report on the coupling of ZnO nanoparticles with plasmonic gold nanoislands in a solution-processed photodetector, which results in a clear enhancement in the optical absorption and the electrical responsivity of ZnO nanoparticles, to cover the vi... Read More about Persistent near-infrared photoconductivity of ZnO nanoparticles based on plasmonic hot charge carriers.

Percolation threshold enables optical resistive‐memory switching and light‐tuneable synaptic learning in segregated nanocomposites (2019)
Journal Article
Jaafar, A. H., O'Neill, M., Kelly, S. M., Verrelli, E., & Kemp, N. T. (2019). Percolation threshold enables optical resistive‐memory switching and light‐tuneable synaptic learning in segregated nanocomposites. Advanced Electronic Materials, 5(7), Article 1900197. https://doi.org/10.1002/aelm.201900197

An optical memristor where the electrical resistance memory depends on the history of both the current flowing through the device and the irradiance of incident light onto it is demonstrated. It is based on a nanocomposite consisting of functionalize... Read More about Percolation threshold enables optical resistive‐memory switching and light‐tuneable synaptic learning in segregated nanocomposites.

A label-free aptamer-based nanogap capacitive biosensor with greatly diminished electrode polarization effects (2019)
Journal Article
Ghobaei Namhil, Z., Kemp, C., Verrelli, E., Iles, A., Pamme, N., Adawi, A. M., & Kemp, N. (2019). A label-free aptamer-based nanogap capacitive biosensor with greatly diminished electrode polarization effects. Physical chemistry chemical physics : PCCP, 21(2), 681-691. https://doi.org/10.1039/c8cp05510f

A significant impediment to the use of impedance spectroscopy in bio-sensing is the electrode polarization effect that arises from the movement of free ions to the electrode-solution interface, forming an electrical double layer (EDL). The EDL screen... Read More about A label-free aptamer-based nanogap capacitive biosensor with greatly diminished electrode polarization effects.

Lyotropic 'hairy' TiO2 nanorods (2018)
Journal Article
Cheng, F., Verrelli, E., Alharthi, F. A., Kelly, S. M., O'Neill, M., Kemp, N. T., Kitney, S. P., Lai, K. T., Mehl, G. H., & Anthopoulos, T. (2019). Lyotropic 'hairy' TiO2 nanorods. Nanoscale advances, 1(1), 254-264. https://doi.org/10.1039/c8na00054a

We report the synthesis of the first stable, solution-processable and photocrosslinkable hybrid organic/inorganic titanium dioxide nanorods as ‘hairy rods’ coated with phosphonate ligands with photoreactive coumarin groups located in a terminal posit... Read More about Lyotropic 'hairy' TiO2 nanorods.

Method to reduce the formation of crystallites in ZnO nanorod thin-films grown via ultra-fast microwave heating (2018)
Journal Article
Gray, R. J., Jaafar, A. H., Verrelli, E., & Kemp, N. T. (2018). Method to reduce the formation of crystallites in ZnO nanorod thin-films grown via ultra-fast microwave heating. Thin solid films, 662, 116-122. https://doi.org/10.1016/j.tsf.2018.07.034

© 2018 This paper discusses the nucleation and growth mechanisms of ZnO nanorod thin-films and larger sized crystallites that form within the solution and on surfaces during an ultra-fast microwave heating growth process. In particular, the work focu... Read More about Method to reduce the formation of crystallites in ZnO nanorod thin-films grown via ultra-fast microwave heating.

Cover Picture: Ann. Phys. 2'2018 (2018)
Journal Article
Verrelli, E., Michelakaki, I., Boukos, N., Kyriakou, G., & Tsoukalas, D. (2018). Cover Picture: Ann. Phys. 2'2018. Annalen der Physik, 530(2), https://doi.org/10.1002/andp.201870013

In article number 1700256, Emanuele Verrelli and co‐workers propose that cluster beam deposition of sub‐2nm magic number Au clusters, Au20 and Au55, on flat surfaces reveals a rich evolution of the phenomena taking place at substrate level. New magic... Read More about Cover Picture: Ann. Phys. 2'2018.

Solution-processable, niobium-doped titanium oxide nanorods for application in low-voltage, large-area electronic devices (2017)
Journal Article
Alharthi, F. A., Cheng, F., Verrelli, E., Kemp, N. T., Lee, A. F., Isaacs, M. A., O’Neill, M., & Kelly, S. M. (2017). Solution-processable, niobium-doped titanium oxide nanorods for application in low-voltage, large-area electronic devices. Journal of Materials Chemistry C, 6(5), 1038-1047. https://doi.org/10.1039/c7tc04197g

We report for the first time the one-step synthesis of solution-processable, highly crystalline, niobiumdoped titanium dioxide (Nb-TiO2) nanorods in the anatase phase by the hydrolytic condensation of Ti(OiPr)4 and niobium(V) ethoxide using oleic aci... Read More about Solution-processable, niobium-doped titanium oxide nanorods for application in low-voltage, large-area electronic devices.

Coalescence of cluster beam generated sub-2 nm bare Au nanoparticles and analysis of Au film growth parameters (2017)
Journal Article
Verrelli, E., Michelakaki, I., Boukos, N., Kyriakou, G., & Tsoukalas, D. (2017). Coalescence of cluster beam generated sub-2 nm bare Au nanoparticles and analysis of Au film growth parameters. Annalen der Physik, 530(2), 1700256. https://doi.org/10.1002/andp.201700256

© 2017 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim In this work is presented the growth model for Au films grown on a carbon substrate at room temperature by using as building blocks Au nanoparticles (NPs) with 1.4 nm mean size generated via remo... Read More about Coalescence of cluster beam generated sub-2 nm bare Au nanoparticles and analysis of Au film growth parameters.

Reversible optical switching memristors with tunable STDP synaptic plasticity: a route to hierarchical control in artificial intelligent systems (2017)
Journal Article
Jaafar, A. H., Gray, R. J., Verrelli, E., O'Neill, M., Kelly, S. M., & Kemp, N. T. (2017). Reversible optical switching memristors with tunable STDP synaptic plasticity: a route to hierarchical control in artificial intelligent systems. Nanoscale, 9(43), 17091-17098. https://doi.org/10.1039/c7nr06138b

© 2017 The Royal Society of Chemistry. Optical control of memristors opens the route to new applications in optoelectronic switching and neuromorphic computing. Motivated by the need for reversible and latched optical switching we report on the devel... Read More about Reversible optical switching memristors with tunable STDP synaptic plasticity: a route to hierarchical control in artificial intelligent systems.

Dual wavelength (ultraviolet and green) photodetectors using solution processed zinc oxide nanoparticles (2017)
Journal Article
O'Neill, M., Ibrahem, M. A., Verrelli, E., Lai, K. T., Kyriakou, G., Lee, A. F., Isaacs, M. A., Cheng, F., & O’Neill, M. (2017). Dual wavelength (ultraviolet and green) photodetectors using solution processed zinc oxide nanoparticles. ACS Applied Materials & Interfaces, 9(42), 36971-36979. https://doi.org/10.1021/acsami.7b08092

Narrow-band photoconductivity with a spectral width of 0.16 eV is obtained from solution-processed colloidal ZnO nanocrystals beneath the band-edge at 2.25 eV. A new model involving electron transfer from deep defects to discrete shallow donors is in... Read More about Dual wavelength (ultraviolet and green) photodetectors using solution processed zinc oxide nanoparticles.

Nanoparticles-based flash-like nonvolatile memories: Cluster beam synthesis of metallic nanoparticles and challenges for the overlying control oxide layer (2017)
Book Chapter
Verrelli, E., & Tsoukalas, D. (2017). Nanoparticles-based flash-like nonvolatile memories: Cluster beam synthesis of metallic nanoparticles and challenges for the overlying control oxide layer. In P. Dimitrakis (Ed.), Charge-Trapping Non-Volatile Memories (157-210). Springer. https://doi.org/10.1007/978-3-319-48705-2_5

Nanoparticles (NPs) are of great scientific interest as they are effectively a bridge between bulk materials and atomic or molecular structures. In this work the focus is to present results concerning the use of NPs deposited using a novel room tempe... Read More about Nanoparticles-based flash-like nonvolatile memories: Cluster beam synthesis of metallic nanoparticles and challenges for the overlying control oxide layer.

Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices (2016)
Journal Article
Jabarullah, N. H., Verrelli, E., Gee, A., Mauldin, C., Navarro, L. A., Golden, J. H., & Kemp, N. T. (in press). Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices. RSC advances, 6(89), 85710-85717. https://doi.org/10.1039/c6ra18549e

New two terminal surge protection devices based on intrinsic conducting polymers are demonstrated to be strongly affected by the dopant molecule type. Thermogravimetric analysis combined with current–voltage studies show a causal link between the dop... Read More about Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices.

Super hydrophobic SAM modified electrodes for enhanced current limiting properties in intrinsic conducting polymer surge protection devices (2015)
Journal Article
Jabarullah, N. H., Verrelli, E., Mauldin, C., Navarro, L. A., Golden, J. H., Madianos, L. M., & Kemp, N. T. (2015). Super hydrophobic SAM modified electrodes for enhanced current limiting properties in intrinsic conducting polymer surge protection devices. Langmuir : the ACS journal of surfaces and colloids, 31(22), 6253-6264. https://doi.org/10.1021/acs.langmuir.5b00686

Surface interface engineering using superhydrophobic gold electrodes made with 1-dodecanethiol self-assembled monolayer (SAM) has been used to enhance the current limiting properties of novel surge protection devices based on the intrinsic conducting... Read More about Super hydrophobic SAM modified electrodes for enhanced current limiting properties in intrinsic conducting polymer surge protection devices.

Microwave oven fabricated hybrid memristor devices for non-volatile memory storage (2014)
Journal Article
Verrelli, E., Gray, R. J., O'Neill, M., Kelly, S. M., & Kemp, N. T. (2014). Microwave oven fabricated hybrid memristor devices for non-volatile memory storage. Materials Research Express, 1(4), Article ARTN 046305. https://doi.org/10.1088/2053-1591/1/4/046305

© 2014 IOP Publishing Ltd. Novel hybrid non-volatile memories made using an ultra-fast microwave heating method are reported for the first time. The devices, consisting of aligned ZnO nanorods embedded in poly (methyl methacrylate), require no formin... Read More about Microwave oven fabricated hybrid memristor devices for non-volatile memory storage.

Novel conducting polymer current limiting devices for low cost surge protection applications (2014)
Journal Article
Jabarullah, N. H., Verrelli, E., Mauldin, C., Navarro, L. A., Golden, J., Madianos, L., Tsoukalas, D., & Kemp, N. T. (2014). Novel conducting polymer current limiting devices for low cost surge protection applications. Journal of applied physics, 116(16), 164501. https://doi.org/10.1063/1.4899246

We report on the development of novel intrinsic conducting polymer two terminal surge protection devices. These resettable current limiting devices consist of polyaniline nanofibres doped with methane sulphonic acid electrochemically deposited betwee... Read More about Novel conducting polymer current limiting devices for low cost surge protection applications.

Cluster beam synthesis of metal and metal-oxide nanoparticles for emerging memories (2014)
Journal Article
Verrelli, E., & Tsoukalas, D. (2014). Cluster beam synthesis of metal and metal-oxide nanoparticles for emerging memories. Solid-state electronics, 101, 95-105. https://doi.org/10.1016/j.sse.2014.06.017

© 2014 Elsevier Ltd. All rights reserved. In this work we present results concerning the cluster beam synthesis of metal and metal-oxide nanoparticles together with their applications in emerging memories like nanoparticle Flash memories and resistiv... Read More about Cluster beam synthesis of metal and metal-oxide nanoparticles for emerging memories.

Investigation of the gate oxide leakage current of low temperature formed hafnium oxide films (2013)
Journal Article
Verrelli, E., & Tsoukalas, D. (2013). Investigation of the gate oxide leakage current of low temperature formed hafnium oxide films. Journal of applied physics, 113(11), Article 114103. https://doi.org/10.1063/1.4795278

In this work, low temperature physically deposited hafnium oxide films are investigated in terms of their electrical properties through measurements and analysis of leakage currents in order to understand the defects behavior in this dielectric mater... Read More about Investigation of the gate oxide leakage current of low temperature formed hafnium oxide films.