1
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Laucirica G, Toimil-Molares ME, Marmisollé WA, Azzaroni O. Unlocking Nanoprecipitation: A Pathway to High Reversibility in Nanofluidic Memristors. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39423295 DOI: 10.1021/acsami.4c11522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2024]
Abstract
Solid-state nanochannels have emerged as a promising platform for the development of ionic circuit components with analog properties to their traditional electronic counterparts. In the last years, nanofluidic devices with memristive properties have attracted special interest due to their applicability in, for example, the construction of brain-like computing systems. In this work, an asymmetric track-etched nanofluidic channel with memory-enhanced ion transport is reported. The results illustrate that the formation of nanoprecipitates on the channel walls induces memory effects in ion transport, leading to characteristic hysteresis loops in the current-voltage curves, a hallmark of memristive behavior. Notably, these memristive properties are achievable with a straightforward experimental setup that combines an aqueous solvent and a relatively low-soluble inorganic salt. The various conductance states can be rapidly and reversibly tuned over prolonged time scales. Furthermore, under appropriate measurement conditions, the nanofluidic device can alternate between different iontronic regimes and states, encompassing ion current rectification, ON-OFF states, and memristor-like behavior. These findings provide insights into the design and optimization of nanofluidic devices for bioinspired ionic circuit components.
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Affiliation(s)
- Gregorio Laucirica
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, La Plata B1904DPI, Argentina
- UCAM-SENS, Universidad Católica San Antonio de Murcia, UCAM HiTech, 30107 Murcia, Spain
| | - María Eugenia Toimil-Molares
- Materials Research Department, GSI Helmholtz Centre for Heavy Ion Research, 64291, Darmstadt, Germany
- Department of Materials- and Geosciences, Technical University Darmstadt, 64283, Darmstadt, Germany
| | - Waldemar Alejandro Marmisollé
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, La Plata B1904DPI, Argentina
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, La Plata B1904DPI, Argentina
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2
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Zhang X, Wang Y, Zheng J, Yang C, Wang D. Scan-Rate-Dependent Ion Current Rectification in Bipolar Interfacial Nanopores. MICROMACHINES 2024; 15:1176. [PMID: 39337836 PMCID: PMC11433788 DOI: 10.3390/mi15091176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2024] [Revised: 09/20/2024] [Accepted: 09/22/2024] [Indexed: 09/30/2024]
Abstract
This study presents a theoretical investigation into the voltammetric behavior of bipolar interfacial nanopores due to the effect of potential scan rate (1-1000 V/s). Finite element method (FEM) is utilized to explore the current-voltage (I-V) properties of bipolar interfacial nanopores at different bulk salt concentrations. The results demonstrate a strong impact of the scan rate on the I-V response of bipolar interfacial nanopores, particularly at relatively low concentrations. Hysteresis loops are observed in bipolar interfacial nanopores under specific scan rates and potential ranges and divided by a cross-point potential that remains unaffected by the scan rate employed. This indicates that the current in bipolar interfacial nanopores is not just reliant on the bias potential that is imposed but also on the previous conditions within the nanopore, exhibiting history-dependent or memory effects. This scan-rate-dependent current-voltage response is found to be significantly influenced by the length of the nanopore (membrane thickness). Thicker membranes exhibit a more pronounced scan-rate-dependent phenomenon, as the mass transfer of ionic species is slower relative to the potential scan rate. Additionally, unlike conventional bipolar nanopores, the ion current passing through bipolar interfacial nanopores is minimally affected by the membrane thickness, making it easier to detect.
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Affiliation(s)
- Xiaoling Zhang
- School of Smart Health, Chongqing Polytechnic University of Electronic Technology, Chongqing 401331, China
| | - Yunjiao Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China;
| | - Jiahui Zheng
- Key Laboratory of Biorheological Science and Technology, Ministry of Education and Bioengineering College, Chongqing University, Chongqing 400044, China; (J.Z.); (C.Y.)
| | - Chen Yang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education and Bioengineering College, Chongqing University, Chongqing 400044, China; (J.Z.); (C.Y.)
| | - Deqiang Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China;
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3
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Lanzavecchia G, Sapunova A, Douaki A, Weng S, Momotenko D, Paulo G, Giacomello A, Krahne R, Garoli D. Tailored Fabrication of 3D Nanopores Made of Dielectric Oxides for Multiple Nanoscale Applications. NANO LETTERS 2024; 24:10098-10105. [PMID: 39121066 PMCID: PMC11342934 DOI: 10.1021/acs.nanolett.4c02117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/18/2024] [Accepted: 06/21/2024] [Indexed: 08/11/2024]
Abstract
Solid-state nanopores are a key platform for single-molecule detection and analysis that allow engineering of their properties by controlling size, shape, and chemical functionalization. However, approaches relying on polymers have limits for what concerns hardness, robustness, durability, and refractive index. Nanopores made of oxides with high dielectric constant would overcome such limits and have the potential to extend the suitability of solid-state nanopores toward optoelectronic technologies. Here, we present a versatile method to fabricate three-dimensional nanopores made of different dielectric oxides with convex, straight, and concave shapes and demonstrate their functionality in a series of technologies and applications such as ionic nanochannels, ionic current rectification, memristors, and DNA sensing. Our experimental data are supported by numerical simulations that showcase the effect of different shapes and oxide materials. This approach toward robust and tunable solid-state nanopores can be extended to other 3D shapes and a variety of dielectrics.
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Affiliation(s)
- German Lanzavecchia
- Optoelectronics, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- Dipartimento
di Fisica, Università degli Studi
di Genova, Via Dodecaneso
33, 16146, Genova, Italy
| | - Anastasiia Sapunova
- Optoelectronics, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- Università
degli Studi di Milano-Bicocca, Piazza dell’Ateneo Nuovo, 1, 20126, Milano, Italy
| | - Ali Douaki
- Optoelectronics, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Shukun Weng
- Optoelectronics, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- Università
degli Studi di Milano-Bicocca, Piazza dell’Ateneo Nuovo, 1, 20126, Milano, Italy
| | - Dmitry Momotenko
- Institute
of Chemistry, Carl von Ossietzky Universität
Oldenburg, Oldenburg D-26129, Germany
| | - Gonçalo Paulo
- Dipartimento
di Ingegneria Meccanica e Aerospaziale, Sapienza Università di Roma, Via Eudossiana 18, 00184 Roma, Italy
| | - Alberto Giacomello
- Dipartimento
di Ingegneria Meccanica e Aerospaziale, Sapienza Università di Roma, Via Eudossiana 18, 00184 Roma, Italy
| | - Roman Krahne
- Optoelectronics, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Denis Garoli
- Optoelectronics, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- Dipartimento
di Scienze e Metodi dell’Ingegneria, Università degli Studi di Modena e Reggio Emilia, Via Amendola 2, 43122, Reggio Emilia, Italy
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4
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Bisquert J, Sánchez-Mateu M, Bou A, Suwen Law C, Santos A. Synaptic Response of Fluidic Nanopores: The Connection of Potentiation with Hysteresis. Chemphyschem 2024:e202400265. [PMID: 39119992 DOI: 10.1002/cphc.202400265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 08/07/2024] [Accepted: 08/08/2024] [Indexed: 08/10/2024]
Abstract
Iontronic fluidic ionic/electronic components are emerging as promising elements for artificial brain-like computation systems. Nanopore ionic rectifiers can be operated as a synapse element, exhibiting conductance modulation in response to a train of voltage impulses, thus producing programmable resistive states. We propose a model that replicates hysteresis, rectification, and time domain response properties, based on conductance modulation between two conducting modes and a relaxation time of the state variable. We show that the kinetic effects observed in hysteresis loops govern the potentiation phenomena related to conductivity modulation. To illustrate the efficacy of the model, we apply it to replicate rectification, hysteresis and conductance modulation of two different experimental systems: a polymer membrane with conical pores, and a blind-hole nanoporous anodic alumina membrane with a barrier oxide layer. We show that the time transient analysis of the model develops the observed potentiation and depression phenomena of the synaptic properties.
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Affiliation(s)
- Juan Bisquert
- Instituto de Tecnología Química, Universitat Politècnica de València-Agencia Estatal Consejo Superior de Investigaciones Científicas), Av. dels Tarongers, 46022, València, Spain
- Institute of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain
| | - Marc Sánchez-Mateu
- Institute of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain
| | - Agustín Bou
- Leibniz-Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, 01069, Dresden, Germany
| | - Cheryl Suwen Law
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia, 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia, 5005, Australia
| | - Abel Santos
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia, 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia, 5005, Australia
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5
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Portillo S, Manzanares JA, Ramirez P, Bisquert J, Mafe S, Cervera J. pH-Dependent Effects in Nanofluidic Memristors. J Phys Chem Lett 2024; 15:7793-7798. [PMID: 39049562 PMCID: PMC11299186 DOI: 10.1021/acs.jpclett.4c01610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 07/04/2024] [Accepted: 07/22/2024] [Indexed: 07/27/2024]
Abstract
Multipore membranes with nanofluidic diodes show memristive and current rectifying effects that can be controlled by the nanostructure asymmetry and ionic solution characteristics in addition to the frequency and amplitude of the electrical driving signal. Here, we show that the electrical conduction phenomena, which are modulated by the interaction between the pore surface charges and the solution mobile ions, allow for a pH-dependent neuromorphic-like potentiation of the membrane conductance by voltage pulses. Also, we demonstrate that arrangements of memristors can be employed in the design of electrochemical circuits for implementing logic functions and information processing in iontronics.
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Affiliation(s)
- Sergio Portillo
- Departament
de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
| | - José A. Manzanares
- Departament
de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
| | - Patricio Ramirez
- Departament
de Física Aplicada, Universitat Politécnica
de València, E-46022 València, Spain
| | - Juan Bisquert
- Instituto
de Tecnología Química, (Universitat
Politècnica de València-Agencia Estatal Consejo Superior
de Investigaciones Científicas), Av. dels Tarongers, 46022 València, Spain
| | - Salvador Mafe
- Departament
de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
| | - Javier Cervera
- Departament
de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
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6
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Liu Z, Ma L, Zhang H, Zhuang J, Man J, Siwy ZS, Qiu Y. Dynamic Response of Ionic Current in Conical Nanopores. ACS APPLIED MATERIALS & INTERFACES 2024; 16:30496-30505. [PMID: 38830306 DOI: 10.1021/acsami.4c02078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
Ionic current rectification (ICR) of charged conical nanopores has various applications in fields including nanofluidics, biosensing, and energy conversion, whose function is closely related to the dynamic response of nanopores. The occurrence of ICR originates from the ion enrichment and depletion in conical pores, whose formation is found to be affected by the scanning rate of voltages. Here, through time-dependent simulations, we investigate the variation of ion current under electric fields and the dynamic formation of ion enrichment and depletion, which can reflect the response time of conical nanopores. The response time of nanopores when ion enrichment forms, i.e., at the "on" state is significantly longer than that with the formation of ion depletion, i.e., at the "off" state. Our simulation results reveal the regulation of response time by different nanopore parameters including the surface charge density, pore length, tip, and base radius, as well as the applied conditions such as the voltage and bulk concentration. The response time of nanopores is closely related to the surface charge density, pore length, voltage, and bulk concentration. Our uncovered dynamic response mechanism of the ionic current can guide the design of nanofluidic devices with conical nanopores, including memristors, ionic switches, and rectifiers.
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Affiliation(s)
- Zhe Liu
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
- Shenzhen Research Institute of Shandong University, Shenzhen 518000, China
| | - Long Ma
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Hongwen Zhang
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Jiakun Zhuang
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Jia Man
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Zuzanna S Siwy
- Department of Physics and Astronomy, University of California, Irvine, California 92697, United States
| | - Yinghua Qiu
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China
- Shenzhen Research Institute of Shandong University, Shenzhen 518000, China
- Suzhou Research Institute of Shandong University, Suzhou 215123, China
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7
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Ling Y, Yu L, Guo Z, Bian F, Wang Y, Wang X, Hou Y, Hou X. Single-Pore Nanofluidic Logic Memristor with Reconfigurable Synaptic Functions and Designable Combinations. J Am Chem Soc 2024; 146:14558-14565. [PMID: 38755097 DOI: 10.1021/jacs.4c01218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
The biological neural network is a highly efficient in-memory computing system that integrates memory and logical computing functions within synapses. Moreover, reconfiguration by environmental chemical signals endows biological neural networks with dynamic multifunctions and enhanced efficiency. Nanofluidic memristors have emerged as promising candidates for mimicking synaptic functions, owing to their similarity to synapses in the underlying mechanisms of ion signaling in ion channels. However, realizing chemical signal-modulated logic functions in nanofluidic memristors, which is the basis for brain-like computing applications, remains unachieved. Here, we report a single-pore nanofluidic logic memristor with reconfigurable logic functions. Based on the different degrees of protonation and deprotonation of functional groups on the inner surface of the single pore, the modulation of the memristors and the reconfiguration of logic functions are realized. More noteworthy, this single-pore nanofluidic memristor can not only avoid the average effects in multipore but also act as a fundamental component in constructing complex neural networks through series and parallel circuits, which lays the groundwork for future artificial nanofluidic neural networks. The implementation of dynamic synaptic functions, modulation of logic gates by chemical signals, and diverse combinations in single-pore nanofluidic memristors opens up new possibilities for their applications in brain-inspired computing.
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Affiliation(s)
- Yixin Ling
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Lejian Yu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ziwen Guo
- Institute of Artificial Intelligence, Xiamen University, Xiamen 361005, China
| | - Fazhou Bian
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Materials Research, Jiujiang Research Institute, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Yanqiong Wang
- Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, China
| | - Xin Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yaqi Hou
- Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, China
| | - Xu Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Institute of Artificial Intelligence, Xiamen University, Xiamen 361005, China
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Materials Research, Jiujiang Research Institute, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361102, China
- Engineering Research Center of Electrochemical Technologies of Ministry of Education, Xiamen University, Xiamen 361005, China
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8
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Kamsma TM, Kim J, Kim K, Boon WQ, Spitoni C, Park J, van Roij R. Brain-inspired computing with fluidic iontronic nanochannels. Proc Natl Acad Sci U S A 2024; 121:e2320242121. [PMID: 38657046 PMCID: PMC11067030 DOI: 10.1073/pnas.2320242121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 03/19/2024] [Indexed: 04/26/2024] Open
Abstract
The brain's remarkable and efficient information processing capability is driving research into brain-inspired (neuromorphic) computing paradigms. Artificial aqueous ion channels are emerging as an exciting platform for neuromorphic computing, representing a departure from conventional solid-state devices by directly mimicking the brain's fluidic ion transport. Supported by a quantitative theoretical model, we present easy-to-fabricate tapered microchannels that embed a conducting network of fluidic nanochannels between a colloidal structure. Due to transient salt concentration polarization, our devices are volatile memristors (memory resistors) that are remarkably stable. The voltage-driven net salt flux and accumulation, that underpin the concentration polarization, surprisingly combine into a diffusionlike quadratic dependence of the memory retention time on the channel length, allowing channel design for a specific timescale. We implement our device as a synaptic element for neuromorphic reservoir computing. Individual channels distinguish various time series, that together represent (handwritten) numbers, for subsequent in silico classification with a simple readout function. Our results represent a significant step toward realizing the promise of fluidic ion channels as a platform to emulate the rich aqueous dynamics of the brain.
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Affiliation(s)
- Tim M. Kamsma
- Institute for Theoretical Physics, Department of Physics, Utrecht University, Utrecht3584, The Netherlands
- Mathematical Institute, Department of Mathematics, Utrecht University, Utrecht3584, The Netherlands
| | - Jaehyun Kim
- Department of Mechanical Engineering, Sogang University, Seoul04107, Republic of Korea
| | - Kyungjun Kim
- Department of Mechanical Engineering, Sogang University, Seoul04107, Republic of Korea
| | - Willem Q. Boon
- Institute for Theoretical Physics, Department of Physics, Utrecht University, Utrecht3584, The Netherlands
| | - Cristian Spitoni
- Mathematical Institute, Department of Mathematics, Utrecht University, Utrecht3584, The Netherlands
| | - Jungyul Park
- Department of Mechanical Engineering, Sogang University, Seoul04107, Republic of Korea
| | - René van Roij
- Institute for Theoretical Physics, Department of Physics, Utrecht University, Utrecht3584, The Netherlands
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9
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Ramirez P, Portillo S, Cervera J, Bisquert J, Mafe S. Memristive arrangements of nanofluidic pores. Phys Rev E 2024; 109:044803. [PMID: 38755814 DOI: 10.1103/physreve.109.044803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 03/29/2024] [Indexed: 05/18/2024]
Abstract
We demonstrate that nanofluidic diodes in multipore membranes show a memristive behavior that can be controlled not only by the amplitude and frequency of the external signal but also by series and parallel arrangements of the membranes. Each memristor consists of a polymeric membrane with conical nanopores that allow current rectification due to the electrical interaction between the ionic solution and the pore surface charges. This surface charge-regulated ionic transport shows a rich nonlinear physics, including memory and inductive effects, which are characterized here by the current-voltage curves and electrical impedance spectroscopy. Also, neuromorphiclike potentiation of the membrane conductance following voltage pulses (spikes) is observed. The multipore membrane with nanofluidic diodes shows physical concepts that should have application for information processing and signal conversion in iontronics hybrid devices.
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Affiliation(s)
- Patricio Ramirez
- Departament de Física Aplicada, Universitat Politècnica de València, E-46022 València, Spain
| | - Sergio Portillo
- Departament de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
| | - Javier Cervera
- Departament de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
| | - Juan Bisquert
- Institute of Advanced Materials (INAM), Universitat Jaume I, 12006 Castelló, Spain
| | - Salvador Mafe
- Departament de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
- Allen Discovery Center at Tufts University, Medford, Massachusetts 02155, USA
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10
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Ramirez P, Portillo S, Cervera J, Nasir S, Ali M, Ensinger W, Mafe S. Neuromorphic responses of nanofluidic memristors in symmetric and asymmetric ionic solutions. J Chem Phys 2024; 160:044701. [PMID: 38258920 DOI: 10.1063/5.0188940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Accepted: 01/02/2024] [Indexed: 01/24/2024] Open
Abstract
We show that ionic conduction properties of a multipore nanofluidic memristor can be controlled not only by the amplitude and frequency of an external driving signal but also by chemical gating based on the electrolyte concentration, presence of divalent and trivalent cations, and multi-ionic systems in single and mixed electrolytes. In addition, we describe the modulation of current rectification and hysteresis phenomena, together with neuromorphic conductance responses to voltage pulses, in symmetric and asymmetric external solutions. In our case, memristor conical pores act as nanofluidic diodes modulated by ionic solution characteristics due to the surface charge-regulated ionic transport. The above facts suggest potential sensing and actuating applications based on the conversion between ionic and electronic signals in bioelectrochemical hybrid circuits.
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Affiliation(s)
- Patricio Ramirez
- Dept. de Física Aplicada, Universitat Politècnica de València, E-46022 València, Spain
| | - Sergio Portillo
- Dept. de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
| | - Javier Cervera
- Dept. de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
| | - Saima Nasir
- Dept. of Material- and Geo-Sciences, Technische Universität Darmstadt, D-64287 Darmstadt, Germany
- Materials Research Dept., GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - Mubarak Ali
- Dept. of Material- and Geo-Sciences, Technische Universität Darmstadt, D-64287 Darmstadt, Germany
- Materials Research Dept., GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - Wolfgang Ensinger
- Materials Research Dept., GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - Salvador Mafe
- Dept. de Física de la Terra i Termodinàmica, Universitat de València, E-46100 Burjassot, Spain
- Allen Discovery Center at Tufts University, Medford, Massachusetts 02155, USA
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