Publication date: 15th April 2025
Memristors could mitigate the limitations of von Neumann architecture, empower brain-mimicking capabilities, and lower energy demand. However, advanced neuronal functions and long-term memory among other technical issues remain challenging to establish. Our group have adopted a combined experimental and simulation approach from fundamental nanoelectrochemistry perspective to study ion transport dynamics confined through ordered asymmetric nanogeometry and its defined nanointerfaces. This talk will introduce our recent findings based on two types of nanofluidic-type devices, both featuring broken symmetry along the transport trajectory. In the first system, we make individual conical quartz nanopipettes that can hold the same or different solutions inside and outside. As a scaled-up ensemble system, anodized aluminum oxide membranes containing arrays of nanochannels are synthesized as separators of two solutions. Characteristic memristor responses of pinched current–potential loops are resolved in voltammetric experiments and successfully reproduced through finite element simulation. Excitatory and inhibitory conductance states are shown to arise from the enrichment and depletion of mobile charge carriers, conveniently tuned by the pulse waveform. Negative differential resistance, a decrease in conductance with increasing potential, is shown to arise from the availability and redistribution of the ionic charges during the hysteretic and rectified transport at asymmetric nanointerfaces. Mechanistic understanding and controllable state-switching dynamics shine light on avenues to achieve higher-order complexity functions.
U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0024457 and FaCT EFRC under Award Number 3ERKCK61.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.