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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. doi: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

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. doi: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

Lyotropic ‘hairy’ TiO2 nanorods (2018)
Journal Article
Cheng, F., Verrelli, E., Alharthi, F. A., Kelly, S. M., O'Neill, M., Kemp, N. T., …Anthopoulos, T. (2019). Lyotropic ‘hairy’ TiO2 nanorods. Nanoscale advances, 1, 254-264. doi: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

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). doi:10.1016/j.tsf.2018.07.034. ISSN 0040-6090

© 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

An Optically-Programmable Absorbing Metasurface (2018)
Journal Article
Kossifos, K. M., Antoniades, M. A., Georgiou, J., Jaafar, A. H., & Kemp, N. T. (2018). An Optically-Programmable Absorbing Metasurface. IEEE International Symposium on Circuits and Systems, 2018-May, doi:10.1109/ISCAS.2018.8351874

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

Chua Mem-Components for Adaptive RF Metamaterials (2018)
Journal Article
Georgiou, J., Kossifos, K. M., Antoniades, M. A., Jaafar, A., & Kemp, N. T. (2018). Chua Mem-Components for Adaptive RF Metamaterials. IEEE International Symposium on Circuits and Systems, 2018-May, doi:10.1109/ISCAS.2018.8351852

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

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

© 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

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., …Kemp, N. T. (2014). Novel conducting polymer current limiting devices for low cost surge protection applications. Journal of applied physics, 116(16), (164501). doi:10.1063/1.4899246. ISSN 0021-8979

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

The magnetoelectrochemical switch (2014)
Journal Article
Lunca Popa, P., Kemp, N. T., Majjad, H., Dalmas, G., Faramarzi, V., Andreas, C., …Doudin, B. (2014). The magnetoelectrochemical switch. Proceedings of the National Academy of Sciences of the United States of America, 111(29), 10433-10437. doi:10.1073/pnas.1322828111

In the field of spintronics, the archetype solid-state two-terminal device is the spin valve, where the resistance is controlled by the magnetization configuration. We show here how this concept of spin-dependent switch can be extended to magnetic el... Read More

Magnetoresistance signature of resonant states in electromigrated Ni nanocontacts (2011)
Journal Article
Beaufrand, J. B., Dayen, J. F., Kemp, N. T., Sokolov, A., & Doudin, B. (2011). Magnetoresistance signature of resonant states in electromigrated Ni nanocontacts. Applied physics letters, 98(14), (142504-1 - 142504-3). doi:10.1063/1.3576939. ISSN 0003-6951

Fundamental insight is reported into magnetoresistance properties of ballistic-type atomic size Ni nanojunctions obtained at low temperatures. Feedback-controlled electromigration was used to reveal the ballistic nature of the transport and stabilize... Read More

Electronic transport in conducting polymer nanowire array devices (2011)
Journal Article
Kemp, N. T., Cochrane, J. W., Kemp, N. T., Dujardin, E., Newbury, R., & WCochrane, J. (2011). Electronic transport in conducting polymer nanowire array devices. Nanotechnology, 22(10), doi:10.1088/0957-4484/22/10/105202. ISSN 0957-4484

We report on the temperature dependent conductivity and current-voltage (I-V) properties of novel polyaniline nanowire array devices. Below 60 K, I-V measurements show a transition to non-linear behaviour, leading to the onset at 30 K of a threshold... Read More

Nanotrench for nano and microparticle electrical interconnects (2010)
Journal Article
Dayen, J., Faramarzi, V., Pauly, M., Kemp, N. T., Barbero, M., Pichon, B. P., …Doudin, B. (2010). Nanotrench for nano and microparticle electrical interconnects. Nanotechnology, 21(33), doi:10.1088/0957-4484/21/33/335303

We present a simple and versatile patterning procedure for the reliable and reproducible fabrication of high aspect ratio (10 4 ) electrical interconnects that have separation distances down to 20 nm and lengths of several hundreds of microns. The pr... Read More

Study of molecular spin-crossover complex Fe(phen)(2)(NCS)(2) thin films (2009)
Journal Article
Shi, S., Schmerber, G., Arabski, J., Beaufrand, J., Kim, D. J., Boukari, S., …Ruch, D. (2009). Study of molecular spin-crossover complex Fe(phen)(2)(NCS)(2) thin films. Applied physics letters, 95(4), (043303). doi:10.1063/1.3192355. ISSN 0003-6951

We report on the growth by evaporation under high vacuum of high-quality thin films of Fe(phen)(2)(NCS)(2) (phen=1,10-phenanthroline) that maintain the expected electronic structure down to a thickness of 10 nm and that exhibit a temperature-driven s... Read More

Characteristics of the nucleation and growth of template-free polyaniline nanowires and fibrils (2008)
Journal Article
Kemp, N. T., Cochrane, J. W., & Newbury, R. (2009). Characteristics of the nucleation and growth of template-free polyaniline nanowires and fibrils. Synthetic Metals, 159(5-6), (435-444). doi:10.1016/j.synthmet.2008.11.001. ISSN 0379-6779

Template-free electrochemical deposition of large arrays of uniform and oriented conducting polymer nanowires has recently been demonstrated. In this article, we build upon the key earlier findings and report new phenomena (initial formation of a 2D... Read More