ORCID Profile
0000-0002-5081-4948
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Photonics and Electro-Optical Engineering (excl. Communications) | Electrical and Electronic Engineering | Signal Processing | Biomedical Instrumentation | Biomedical Engineering | Nanofabrication, Growth and Self Assembly
Scientific Instruments | Expanding Knowledge in Engineering | National Security |
Publisher: AIP Publishing
Date: 19-09-2011
DOI: 10.1063/1.3641861
Abstract: The properties of Si and O donors in wurtzite AlN have been studied by means of hybrid functional calculations, finding that both impurities form DX centres. In the case of Si, the stable DX centre is close in energy to the substitutional donor state and to a second metastable DX centre, thus explaining both the persistent effects and the broad range of activation energies observed experimentally. Ionisation energies have been computed for both Si and O donor states.
Publisher: SPIE
Date: 09-12-2016
DOI: 10.1117/12.2242866
Publisher: OSA
Date: 2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2023
Publisher: The Optical Society
Date: 11-03-2019
DOI: 10.1364/OE.27.008777
Publisher: IEEE
Date: 08-2016
Publisher: American Chemical Society (ACS)
Date: 12-04-2016
DOI: 10.1021/ACS.JPCLETT.6B00285
Abstract: We present a comprehensive first-principles study of the band alignment at AlN(0001)/diamond(100) heterojunctions, considering two different polarities of the AlN and taking into account atomic relaxation at the interface. Our simulations show that the valence-band offset reduces dramatically from about 1.6 eV for one polarity to 0.6 eV for the other, changing the corresponding band alignment from staggered (type II) to straddling (type I). Our findings have important consequences for the design of many applications, most notably solid state UV-emitting devices.
Publisher: Informa UK Limited
Date: 14-06-2013
Publisher: Elsevier BV
Date: 2013
Publisher: Elsevier BV
Date: 04-2016
Publisher: OSA
Date: 2018
Publisher: Springer Science and Business Media LLC
Date: 09-02-2018
DOI: 10.1038/S41598-018-20182-X
Abstract: We propose an optical electrode ’optrode’ sensor array for biopotential measurements. The transduction mechanism is based on deformed helix ferroelectric liquid crystals which realign, altering the optrode’s light reflectance properties, relative to applied potential fields of biological cells and tissue. A computational model of extracellular potential recording by the optrode including the electro-optical transduction mechanism is presented, using a combination of time-domain and frequency-domain finite element analysis. Simulations indicate that the device has appropriate temporal response to faithfully transduce neuronal spikes, and spatial resolution to capture impulse propagation along a single neuron. These simulations contribute to the development of multi-channel optrode arrays for spatio-temporal mapping of electric events in excitable biological tissue.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2019
Publisher: Elsevier BV
Date: 06-2017
Publisher: IOP Publishing
Date: 10-2022
Abstract: Objective. Biomedical instrumentation and clinical systems for electrophysiology rely on electrodes and wires for sensing and transmission of bioelectric signals. However, this electronic approach constrains bandwidth, signal conditioning circuit designs, and the number of channels in invasive or miniature devices. This paper demonstrates an alternative approach using light to sense and transmit the electrophysiological signals. Approach. We develop a sensing, passive, fluorophore-free optrode based on the birefringence property of liquid crystals (LCs) operating at the microscale. Main results. We show that these optrodes can have the appropriate linearity ( µ ± s.d.: 99.4 ± 0.5%, n = 11 devices), relative responsivity ( µ ± s.d.: 57 ± 12%V −1 , n = 5 devices), and bandwidth ( µ ± s.d.: 11.1 ± 0.7 kHz, n = 7 devices) for transducing electrophysiology signals into the optical domain. We report capture of rabbit cardiac sinoatrial electrograms and stimulus-evoked compound action potentials from the rabbit sciatic nerve. We also demonstrate miniaturisation potential by fabricating multi-optrode arrays, by developing a process that automatically matches each transducer element area with that of its corresponding biological interface. Significance. Our method of employing LCs to convert bioelectric signals into the optical domain will pave the way for the deployment of high-bandwidth optical telecommunications techniques in ultra-miniature clinical diagnostic and research laboratory neural and cardiac interfaces.
Publisher: The Optical Society
Date: 11-06-2012
DOI: 10.1364/OL.37.002343
Publisher: The Optical Society
Date: 23-01-2017
DOI: 10.1364/OE.25.001692
Publisher: IOP Publishing
Date: 05-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2021
Publisher: Elsevier BV
Date: 12-2017
Publisher: American Physical Society (APS)
Date: 27-11-2018
Publisher: American Chemical Society (ACS)
Date: 26-06-2013
DOI: 10.1021/CG400383T
Publisher: OSA
Date: 2016
Publisher: Springer Science and Business Media LLC
Date: 10-07-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2013
No related organisations have been discovered for Leonardo Silvestri.
Start Date: 2014
End Date: 02-2018
Amount: $320,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2020
End Date: 12-2023
Amount: $494,925.00
Funder: Australian Research Council
View Funded Activity