News – Kemp Nano Electronics Group

Harry Burton presenting his talk at the IEEE conference ISCAS23 in Monterey, California

Harry's Talk_bright

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Our group’s 1st mini colloquium in Nottingham covering topics on Optical and Pressure Sensitive Memristors, Nanocavities, and Photonic and Neuromorphic Computing. A fantastic series of talks followed by a meal at Nando’s and ten-pin bowling!

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Dr Kemp invited to give a talk at the workshop “Advances in Neuromorphic AI and Electronics 2023” at the Department of Physics, School of Science at Loughborough University, June 26th – June 29th, 2023

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Our review article “Printed and Flexible Organic and Inorganic Memristor Devices for Non volatile Memory Applications” is submitted

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Dr Kemp presents an invited talk at Loughborough University “A route to hierarchical control in artificial intelligent systems: memristors with optically tuneable STDP synaptic plasticity“, April 19th 2023

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Dr Kemp presents at the COSY e-COST action 1st General Meeting in Cadiz “From Nanogap Biosensors to Studying Molecules in Confined Systems“, 1-3 March 2023

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ISCAS23

Harry Burton’s paper “Memristor-based LSTM neuromorphic circuits for offshore wind turbine blade fault detection” is accepted for ISCAS 2023 and he will be presenting it with a talk in Monterey, California. Huge congratulations on your first paper and also your recent and ongoing excellent work in the area!

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We welcome Craig Venables as a new PhD student to the group in Nottingham, starting 1st Jan 2023. His 4-year position is funded by the Leverhulme Trust. Welcome aboard!

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New publication in ACS Applied Polymer Materials on the topic of “Optoelectronic Switching Memory Based on ZnO Nanoparticle/Polymer Nanocomposites”

ZnO NP optoelectronic

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We welcome Raven Quinn and Michael Gater as new PhD students to the group in Nottingham, starting 1st Oct 2022. Raven will be working on integrating memristors with optical waveguides on Si chips and Michael will be exploring optical switching in 2-D materials.

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We welcome Dr Ayoub Hamdiyah to the group as a Postdoctoral Research Fellow to study new types of Optical Memristor Devices. His position is funded by a 5-year Leverhulme Trust project grant.

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MemristorComputingSystems

Our new book chapter in “Memristor Computing Systems” Editors: Leon Chua, Ronald Tetzlaff and Angela Slavova Publisher: Springer

Gee A, Jaafar AH, Kemp NT “Optical Memristors: Review of Switching Mechanisms and New Computing Paradigms” Chapter 10, pg 219-244

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photo_collage Mike Gater presenting our paper, “Capacitive effects and memristive switching in three terminal multilayered MoS₂ devices” with authors M.Gater, A.M. Adawi and N.T. Kemp”, at ISCAS 22 (Austin, Texas)

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Several new Postdoc and PhD positions starting in 2022. See Jobs for more details.

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Collaboration with Prof. Jürgen König and Dr Philipp Stegmann on coupled spin switching in two molecule spin crossover systems. A new paper on this work has just been published in Phys. Rev. B “Statistical analysis of spin switching in coupled spin-crossover molecules”

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Exciting new collaboration with Dr Pedro Beltran-Alvarez et al results in an article published in the American Chemical Society journal, Pharmacology & Translational Science “Inhibition of Arginine Methylation Impairs Platelet Function”

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From the 1st of Sept 2021, Dr Kemp will be taking up a new appointment in the School of Physics and Astronomy at the University of Nottingham. Exciting times ahead!

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We welcome two new group members, Daniel Whitt and Harry Burton, who are both starting research PhDs funded by the Aura Doctoral Training Centre. Harry will be working on the development of neuromorphic sensor systems for real-time condition monitoring of wind turbine blades and Daniel will be investigating the development of more efficient forms of storing excess energy created by wind power. Best of luck in your research!

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Results from a large collaborative effort on the development of new types of optical memristors based on TiO2 nanorods is published in the Journal of Physical Chemistry Part C.

Jaafar AH, Al Chawa MM., Chen F, Kelly SM, Picos R, Tetzlaff R, Kemp NT “Polymer/TiO2 Nanorod Nanocomposite Optical Memristor Device”, J. Phys. Chem. C (2021)

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New HEIF funded research project starts on the development of new types of Hydrogen Combustion Sensors! Best of luck everyone on this exciting new project. Helping the UK head towards Carbon Net Zero!

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Dr. Kemp is promoted to Reader in Physics. Congratulations!

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New collaborative research project with Prof. Ronald Tetzlaff (Technische Universität Dresden ) is funded by the Leverhulme Trust. The aim of the 5-Year program of research is to develop new approaches for smarter, faster, more energy efficient, brain-inspired neuromorphic computing based on highly parallel optical memristor networks.

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New invited review article is published in IEEE Sensors Journal.

Kemp NT “A Tutorial on Electrochemical Impedance Spectroscopy and Nanogap Electrodes for Biosensing Applications” IEEE Sensor Journal (2021), p1-12 (Sensors Tutorials: A Vigorous Dive into the Vast Sea of Sensor-Related Knowledge)

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New 3-year EPSRC grant awarded to study the development of new Memcomputing Arrays for Computer Vision Applications.

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New conference article showing evidence of nanoparticle migration in polymers under high electric fields:

Jaafar AH, Gee A, Hamza AO, Eling CJ, Bouillard J.-S, Adawi AM, Kemp NT “Evidence of Nanoparticle Migration in Polymeric Hybrid Memristor Devices” IEEE 2020 European Conference on Circuit Theory and Design (ECCTD), Sofia, Bulgaria

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We welcome our new group members, Chris Carter and Mike Gater, who are both starting PhDs and Craig Venables, who will be doing an MSc (by research). All three will be working on developing new types of optical switching memristors for neuromorphic computing applications. Best of luck in your research!

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Congratulations to Dr. Ayoub Jaafar and Dr. Alex Gee who having finished their PhD’s and have both secured postdoc positions at the University of Southampton and the University of Oxford, respectively. Well done to you both, it is very well deserved!

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Look out for our new book chapter “Optical Memristors: Review of Switching Mechanisms and New Computing Paradigms” Alex Gee, Ayoub H. Jaafar, Neil T. Kemp, which will be coming out soon.

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Single Molecule SCO Switch

Our new article on a single spin crossover (SCO) molecule device is published in the Journal of Physical Chemistry (see “Multilevel Resistance Switching and Enhanced Spin Transition Temperature in Single and Double Molecule Spin Crossover Nanogap Devices“)

This work demonstrates spin-state dependent conductance switching in a unique, single-molecule spin crossover (SCO) device in which the SCO molecule is specifically tailored for surface deposition. In contrast to previously published work this paper uniquely demonstrates a temperature dependence of the switching mechanism. We also demonstrate an enhanced spin transition temperature compared to the bulk SCO material and multilevel resistance switching, signifying the presence of two SCO molecules across the junction. Behavior such as this, when controllable, could facilitate multi-level resistance switching and the development of ultra-small (single molecule) memory devices having more than two binary states.

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Dr. Neil Kemp becomes a member of the Chua Memristor Centre (Dresden) – see https://cmc-dresden.org/members/neil-kemp/

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Optalysys

New project commencing soon with Optalysys investigating the incorporation of optical memristors in Optical AI chips.

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benzenethiol

Exciting work by PhD student Alex Gee published in Nanotechnology detailing how to make “Nanoscale Junctions for Single Molecule Electronics Fabricated using Bilayer Nanoimprint Lithography combined with Feedback Controlled Electromigration”.

The paper then uses the approach to make a high conductance molecular bridge formed with 2 benzenethiol molecules.

(see doi.org/10.1088/1361-6528/ab6473)

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Dr Kemp is awarded a 6-month senior visiting research fellowship at the Technische Universität Dresden (Germany). He will be working with Prof. Ronald Tetzlaff (Chair of the Fundamentals of Electrical Engineering and Director of the Chua Memristor Centre) to develop new optical memristor systems for neuromorphic computing applications.

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Fig2_ZnO_NP_NR

New publication in IEEE Transaction on Nanotechnology. This work compares the different switching mechanisms in devices made with the same materials but having different nanostructure geometries. The article is entitled “Nanorods vs Nanoparticles: A Comparison Study of Au/ZnO-PMMA/Au Non-volatile Memory Devices showing the importance of Nanostructure Geometry on Conduction Mechanisms and Switching Properties”

(see DOI: 10.1109/TNANO.2019.2949759)

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Stephen Wilkinson joins the team to work on the development of a new type of capacitive nanogap biosensor for the detection of hormones in rivers and streams.

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New project working with Enertek International developing new types of Hydrogen Burners and Safety Devices.

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Colloborative work with Dr Jia Min Chin and Dr Michael R. Reithofer on “Dynamic Electric Field Alignment of Metal–Organic Framework Microrods” results in a publication in the Journal of the American Chemical Society.

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GrapheneOx_Dev

New publication in Carbon (IF 7.5) reporting on the first optically tuneable memristor device made with graphene oxide. The work importantly demonstrates both reversible and irreversible optical switching effects depending on whether the light is in the visible or UV electromagnetic spectrum. (read article here )

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Nanowerk spotlight article on our Optical Memristor Research:

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Learning in artificial synapses tuned by light

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filamentary_device Our latest work on the development of Optical Memristors for Light-Tuneable Synaptic Learning has been published in Advanced Electronic Materials. In this work we demonstrate very large optical switching between two resistive memory states.

(see DOI:10.1002/aelm.201900197)

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label-free nanogap biosensor2 Our recent work on the development of a label-free nanogap capacitive biosensor has been published in PCCP. In this work we take advantage of a very small distance between metal electrodes to eliminate electrode polarization effects that normally produce very large parasitic capacitance.