All Outputs (35)

Unique Coexistence of Two Resistive Switching Modes in a Memristor Device Enables Multifunctional Neuromorphic Computing Properties (2024)
Journal Article
Jaafar, A. H., Al Habsi, S. K. S., Braben, T., Venables, C., Francesconi, M. G., Stasiuk, G. J., & Kemp, N. T. (2024). Unique Coexistence of Two Resistive Switching Modes in a Memristor Device Enables Multifunctional Neuromorphic Computing Properties. ACS Applied Materials & Interfaces, 16(33), 43816–43826. https://doi.org/10.1021/acsami.4c07820

We report on hybrid memristor devices consisting of germanium dioxide nanoparticles (GeO2 NP) embedded within a poly(methyl methacrylate) (PMMA) thin film. Besides exhibiting forming-free resistive switching and an uncommon “ON” state in pristine con... Read More about Unique Coexistence of Two Resistive Switching Modes in a Memristor Device Enables Multifunctional Neuromorphic Computing Properties.

Enhanced Switching in Solid Polymer Electrolyte Memristor Devices via the addition of Interfacial Barriers and Quantum Dots (2023)
Presentation / Conference Contribution
Gater, M., Adawi, A., & Kemp, N. (2023, December). Enhanced Switching in Solid Polymer Electrolyte Memristor Devices via the addition of Interfacial Barriers and Quantum Dots. Presented at NANOARCH 2023: IEEE/ACM International Symposium on Nanoscale Architectures, Dresden, Germany

We report on the electrical effects of single and double polymer (polymethacrylate) barriers on polyethylene oxide (PEO) based memristors. The single barrier device with an active layer embedded with WS2 quantum dots is also investigated. The additio... Read More about Enhanced Switching in Solid Polymer Electrolyte Memristor Devices via the addition of Interfacial Barriers and Quantum Dots.

Investigating protein arginine methylation in platelets and hair (2023)
Thesis
Marsden, A. J. Investigating protein arginine methylation in platelets and hair. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4386508

Post-translational modification (PTM) of platelet proteins has long been known to have an effect on their ability to aggregate and form a thrombus. Arginine methylation (ArgMe) is catalysed by protein arginine methyltransferases (PRMTs) which... Read More about Investigating protein arginine methylation in platelets and hair.

Memristor-based LSTM neuromorphic circuits for offshore wind turbine blade fault detection (2023)
Presentation / Conference Contribution
Burton, H., Bouillard, J. S., & Kemp, N. (in press). Memristor-based LSTM neuromorphic circuits for offshore wind turbine blade fault detection. IEEE International Symposium on Circuits and Systems, 2023, 1-5. https://doi.org/10.1109/ISCAS46773.2023.10181552

The UK offshore wind industry is rapidly growing to meet CO2 emission targets. However, the main drawback of the offshore environment is the increased cost of maintenance. Artificial Neural Networks (ANN) show great potential to reduce this cost. Lon... Read More about Memristor-based LSTM neuromorphic circuits for offshore wind turbine blade fault detection.

Capacitive effects and memristive switching in three terminal multilayered MoS 2 devices (2022)
Presentation / Conference Contribution
Gater, M., Adawi, A. M., & Kemp, N. T. (2022, May). Capacitive effects and memristive switching in three terminal multilayered MoS 2 devices. Presented at 2022 IEEE International Symposium on Circuits and Systems (ISCAS), Austin, Texas

We report on the electrical properties of gated two-terminal multilayered molybdenum disulfide (MoS2) memristor devices having a planar architecture. The approach based on highly dispersed MoS2 flakes drop cast onto a bottom gated Si/SiO2 (100nm) waf... Read More about Capacitive effects and memristive switching in three terminal multilayered MoS 2 devices.

Inhibition of arginine methylation impairs platelet function (2021)
Journal Article
Marsden, A. J., Riley, D. R. J., Barry, A., Khalil, J. S., Guinn, B. A., Kemp, N. T., …Beltran-Alvarez, P. (in press). Inhibition of arginine methylation impairs platelet function. ACS Pharmacology & Translational Science, https://doi.org/10.1021/acsptsci.1c00135

Protein arginine methyltransferases (PRMTs) catalyze the transfer of methyl groups to arginine residues in proteins. PRMT inhibitors are novel, promising drugs against cancer that are currently in clinical trials, which include oral administration of... Read More about Inhibition of arginine methylation impairs platelet function.

Polymer/TiO2Nanorod Nanocomposite Optical Memristor Device (2021)
Journal Article
Jaafar, A. H., Al Chawa, M. M., Cheng, F., Kelly, S. M., Picos, R., Tetzlaff, R., & Kemp, N. T. (2021). Polymer/TiO2Nanorod Nanocomposite Optical Memristor Device. Journal of physical chemistry. C, 125(27), 14965–14973. https://doi.org/10.1021/acs.jpcc.1c02799

Modulation of resistive switching memory by light opens the route to new optoelectronic devices that can be controlled both optically and electronically. Applications include integrated circuits with memory elements switchable by light and neuromorph... Read More about Polymer/TiO2Nanorod Nanocomposite Optical Memristor Device.

A Tutorial on Electrochemical Impedance Spectroscopy and Nanogap Electrodes for Biosensing Applications (2021)
Journal Article
Kemp, N. T. (2021). A Tutorial on Electrochemical Impedance Spectroscopy and Nanogap Electrodes for Biosensing Applications. IEEE sensors journal, https://doi.org/10.1109/JSEN.2021.3084284

Electrochemical Impedance Spectroscopy (EIS) is a powerful measurement technique used by scientists and engineers to characterize and understand the interfacial behavior of liquid-solid interfaces. Such investigations are important in numerous applic... Read More about A Tutorial on Electrochemical Impedance Spectroscopy and Nanogap Electrodes for Biosensing Applications.

Multilevel Resistance Switching and Enhanced Spin Transition Temperature in Single- And Double-Molecule Spin Crossover Nanogap Devices (2020)
Journal Article
Gee, A., Jaafar, A. H., Jaafar, A. H., Brachňaková, B., Massey, J., Marrows, C. H., Marrows, C. H., Šalitroš, I., & Kemp, N. T. (2020). Multilevel Resistance Switching and Enhanced Spin Transition Temperature in Single- And Double-Molecule Spin Crossover Nanogap Devices. Journal of physical chemistry. C, 124(24), 13393-13399. https://doi.org/10.1021/acs.jpcc.0c03824

Spin crossover (SCO) molecules are promising bistable magnetic switches with applications in molecular spintronics. However, little is known about the switching effects of a single SCO molecule when it is confined between two metal electrodes. Here,... Read More about Multilevel Resistance Switching and Enhanced Spin Transition Temperature in Single- And Double-Molecule Spin Crossover Nanogap Devices.

Nanoscale junctions for single molecule electronics fabricated using bilayer nanoimprint lithography combined with feedback controlled electromigration (2020)
Journal Article
Gee, A., Jaafar, A. H., & Kemp, N. T. (2020). Nanoscale junctions for single molecule electronics fabricated using bilayer nanoimprint lithography combined with feedback controlled electromigration. Nanotechnology, 31(15), Article 155203. https://doi.org/10.1088/1361-6528/ab6473

Nanoimprint lithography (NIL) is a fast, simple and high throughput technique that allows fabrication of structures with nanometre precision features at low cost. We present an advanced bilayer nanoimprint lithography approach to fabricate four termi... Read More about Nanoscale junctions for single molecule electronics fabricated using bilayer nanoimprint lithography combined with feedback controlled electromigration.

Dynamic electric field alignment of metal-organic framework micro- rods (2019)
Journal Article
Cheng, F., Young, A. J., Bouillard, J.-S. G., Kemp, N. T., Guillet-Nicolas, R., Hall, C. H., Roberts, D., Jaafar, A. H., Adawi, A. M., Kleitz, F., Imhof, A., Reithofer, M.-C. R., & Chin, J. M. (2019). Dynamic electric field alignment of metal-organic framework micro- rods. Journal of the American Chemical Society, 141(33), 12989-12993. https://doi.org/10.1021/jacs.9b06320

Alignment of Metal Organic Framework (MOF) crystals has previously been performed via careful control of oriented MOF growth on substrates, as well as by dynamic magnetic alignment. We show here that microrod crystals of the MOF NU-1000 can also be d... Read More about Dynamic electric field alignment of metal-organic framework micro- rods.

Wavelength dependent light tunable resistive switching graphene oxide nonvolatile memory devices (2019)
Journal Article
Jaafar, A. H., & Kemp, N. T. (2019). Wavelength dependent light tunable resistive switching graphene oxide nonvolatile memory devices. Carbon, 153, 81-88. https://doi.org/10.1016/j.carbon.2019.07.007

This paper reports on the first optically tunable graphene oxide memristor device. Modulation of resistive switching memory by light opens the route to new optoelectronic devices that can be switched optically and read electronically. Applications in... Read More about Wavelength dependent light tunable resistive switching graphene oxide nonvolatile memory devices.

Ballistic Spin Transport (2019)
Book Chapter
Doudin, B., & Kemp, N. (2019). Ballistic Spin Transport. In E. Y. Tsymbal, & I. Žutić (Eds.), Spintronics Handbook: Spin Transport and Magnetism, vol.3. (2nd. edition). CRC Press. https://doi.org/10.1201/9780429441189

This chapter presents the study of ballistic transport in magnetic nanostructures. Ballistic means that the charges carrying the electrical current go through the sample without experiencing scattering. Ballistic transport is a topic of increasing im... Read More about Ballistic Spin Transport.

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.

Passive memristor synaptic circuits with multiple timing dependent plasticity mechanisms (2018)
Journal Article
Šuch, O., Klimo, M., Kemp, N. T., & Škvarek, O. (2018). Passive memristor synaptic circuits with multiple timing dependent plasticity mechanisms. AEÜ - International Journal of Electronics and Communications / Archiv für Elektronik und Übertragungstechnik, 96, 252-259. https://doi.org/10.1016/j.aeue.2018.09.025

Adaptation of synaptic strength is central to memory and learning in biological systems, enabling important high-level processes such as the ability of animals to respond to a changing environment. Memristor devices are a promising new, nanoscale tec... Read More about Passive memristor synaptic circuits with multiple timing dependent plasticity mechanisms.

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.

An Optically-Programmable Absorbing Metasurface (2018)
Presentation / Conference Contribution
Kossifos, K. M., Antoniades, M. A., Georgiou, J., Jaafar, A. H., & Kemp, N. T. (2018, May). An Optically-Programmable Absorbing Metasurface. Presented at 2018 IEEE International Symposium on Circuits and Systems (ISCAS)

A tunable metasurface absorber is presented in this work using an optically-programmable capacitor as the tuning element. The tuning element does not employ conventional semiconductor technologies to operate but rather a bases its tuning by changing... Read More about An Optically-Programmable Absorbing Metasurface.

Chua mem-components for adaptive RF metamaterials (2018)
Presentation / Conference Contribution
Georgiou, J., Kossifos, K. M., Antoniades, M. A., Jaafar, A., & Kemp, N. T. (2018, May). Chua mem-components for adaptive RF metamaterials. Presented at 2018 IEEE International Symposium on Circuits and Systems (ISCAS)

Chua's mem-components are ideal for creating adaptive metasurfaces for manipulating EM waves given that they hold their state without external biases. In this paper, we propose a generic adaptive reactive element that is in fact a memcapacitor/memind... Read More about Chua mem-components for adaptive RF metamaterials.