1
|
Zhang Z, Sabbagh B, Chen Y, Yossifon G. Geometrically Scalable Iontronic Memristors: Employing Bipolar Polyelectrolyte Gels for Neuromorphic Systems. ACS NANO 2024; 18:15025-15034. [PMID: 38804641 PMCID: PMC11171754 DOI: 10.1021/acsnano.4c01730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 05/04/2024] [Accepted: 05/10/2024] [Indexed: 05/29/2024]
Abstract
Iontronics that are capable of mimicking the functionality of biological systems within an artificial fluidic network have long been pursued for biomedical applications and ion-based intelligence systems. Here, we report on facile and robust realization of iontronic bipolar memristors featuring a three-layer polyelectrolyte gel structure. Significant memristive hysteresis of ion currents was successfully accomplished, and the memory time proved geometrically scalable from 200 to 4000 s. These characteristics were enabled by the ion concentration polarization-induced rectification ratio within the polyelectrolyte gels. The memristors exhibited memory dynamics akin to those observed in unipolar devices, while the bipolar structure notably enabled prolonged memory time and enhanced the ion conductance switching ratio with mesoscale (10-1000 μm) geometry precision. These properties endow the devices with the capability of effective neuromorphic processing with pulse-based input voltage signals. Owing to their simple fabrication process and superior memristive performance, the presented iontronic bipolar memristors are versatile and can be easily integrated into small-scale iontronic circuits, thereby facilitating advanced neuromorphic computing functionalities.
Collapse
Affiliation(s)
- Zhenyu Zhang
- School
of Mechanical Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
- Jiangsu
Key Laboratory for Design and Manufacture of Micro-Nano Biomedical
Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Barak Sabbagh
- School
of Mechanical Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
- Faculty
of Mechanical Engineering, Technion−Israel
Institute of Technology, Haifa 3200003, Israel
| | - Yunfei Chen
- Jiangsu
Key Laboratory for Design and Manufacture of Micro-Nano Biomedical
Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Gilad Yossifon
- School
of Mechanical Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
- Department
of Biomedical Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
| |
Collapse
|
2
|
Park S, Kaufman D, Ben-Yoav H, Yossifon G. On-Chip Electrochemical Sensing with an Enhanced Detecting Signal Due to Concentration Polarization-Based Analyte Preconcentration. Anal Chem 2024; 96:6501-6510. [PMID: 38593185 PMCID: PMC11044107 DOI: 10.1021/acs.analchem.4c01018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 03/21/2024] [Accepted: 03/21/2024] [Indexed: 04/11/2024]
Abstract
Here, we integrated two key technologies within a microfluidic system, an electrokinetic preconcentration of analytes by ion Concentration Polarization (CP) and local electrochemical sensors to detect the analytes, which can synergistically act to significantly enhance the detection signal. This synergistic combination, offering both decoupled and coupled operation modes for continuous monitoring, was validated by the intensified fluorescent intensities of CP-preconcentrated analytes and the associated enhanced electrochemical response using differential pulse voltammetry and chronoamperometry. The system performance was evaluated by varying the location of the active electrochemical sensor, target analyte concentrations, and electrolyte concentration using fluorescein molecules as the model analyte and Homovanillic acid (HVA) as the target bioanalyte within both phosphate-buffered saline (PBS) and artificial sweat solution. The combination of on-chip electrochemical sensing with CP-based preconcentration renders this generic approach adaptable to various analytes. This advanced system shows remarkable promise for enhancing biosensing detection in practical applications while bridging the gap between fundamental research and practical implementation.
Collapse
Affiliation(s)
- Sinwook Park
- School
of Mechanical Engineering, Tel-Aviv University, Tel Aviv, 6997801, Israel
- Department
of Biomedical Engineering, Tel-Aviv University, Tel Aviv, 6997801, Israel
| | - Daniel Kaufman
- Nanobioelectronics
Laboratory (NBEL), Department of Biomedical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Hadar Ben-Yoav
- Nanobioelectronics
Laboratory (NBEL), Department of Biomedical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Gilad Yossifon
- School
of Mechanical Engineering, Tel-Aviv University, Tel Aviv, 6997801, Israel
- Department
of Biomedical Engineering, Tel-Aviv University, Tel Aviv, 6997801, Israel
| |
Collapse
|
3
|
Sabbagh B, Zhang Z, Yossifon G. Logic gating of low-abundance molecules using polyelectrolyte-based diodes. Faraday Discuss 2023; 246:141-156. [PMID: 37528688 DOI: 10.1039/d3fd00061c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Bioinspired artificial ionic components are extensively utilized to mimic biological systems, as the vast majority of biological signaling is mediated by ions and molecules. Particular attention is given to nanoscale fluidic components where the ion transport can be regulated by the induced ion permselectivity. As a step from fundamentals toward ion-controlled devices, this study presents the use of ionic diodes made of oppositely charged polyelectrolytes, as a gate for low-abundance molecules. The use of ionic diodes that exhibited nonlinear current-voltage responses enabled realization of a basic Boolean operation of an ionic OR logic gate. Aside from the electrical response, the asymmetric ion transport through the diode was shown to affect the transport of low-abundance molecules across the diode, only allowing crossing when the diode was forward-biased. Integration of multiple diodes enabled implementation of an OR logic operation on both the voltage and the molecule transport, while obtaining electrical and optical output readouts that were associated with low and high logic levels. Similarly to electronics, implementation of logic gates opens up new functionalities of on-chip ionic computation via integrated circuits consisting of multiple basic logic gates.
Collapse
Affiliation(s)
- Barak Sabbagh
- Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Israel
| | - Zhenyu Zhang
- School of Mechanical Engineering, Southeast University, China
- School of Mechanical Engineering, Tel-Aviv University, Israel.
| | - Gilad Yossifon
- Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Israel
- School of Mechanical Engineering, Tel-Aviv University, Israel.
| |
Collapse
|
4
|
Sabbagh B, Fraiman NE, Fish A, Yossifon G. Designing with Iontronic Logic Gates─From a Single Polyelectrolyte Diode to an Integrated Ionic Circuit. ACS APPLIED MATERIALS & INTERFACES 2023; 15:23361-23370. [PMID: 37068481 DOI: 10.1021/acsami.3c00062] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
This article presents the implementation of on-chip iontronic circuits via small-scale integration of multiple ionic logic gates made of bipolar polyelectrolyte diodes. These ionic circuits are analogous to solid-state electronic circuits, with ions as the charge carriers instead of electrons/holes. We experimentally characterize the responses of a single fluidic diode made of a junction of oppositely charged polyelectrolytes (i.e., anion and cation exchange membranes), with a similar underlying mechanism as a solid-state p- and n-type junction. This served to carry out predesigned logical computations in various architectures by integrating multiple diode-based logic gates, where the electrical signal between the integrated gates was transmitted entirely through ions. The findings shed light on the limitations affecting the number of logic gates that can be integrated, the degradation of the electrical signal, their transient response, and the design rules that can improve the performance of iontronic circuits.
Collapse
Affiliation(s)
- Barak Sabbagh
- Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Noa Edri Fraiman
- Faculty of Engineering, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Alex Fish
- Faculty of Engineering, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Gilad Yossifon
- Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
- School of Mechanical Engineering, Tel Aviv University, Tel Aviv 69978, Israel
| |
Collapse
|
5
|
Park S, Sabbagh B, Abu-Rjal R, Yossifon G. Digital microfluidics-like manipulation of electrokinetically preconcentrated bioparticle plugs in continuous-flow. LAB ON A CHIP 2022; 22:814-825. [PMID: 35080550 DOI: 10.1039/d1lc00864a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Herein, we demonstrate digital microfluidics-like manipulations of preconcentrated biomolecule plugs within a continuous flow that is different from the commonly known digital microfluidics involving discrete (i.e. droplets) media. This is realized using one- and two-dimensional arrays of individually addressable ion-permselective membranes with interconnecting microfluidic channels. The location of powered electrodes, dictates which of the membranes are active and generates either enrichment/depletion diffusion layers, which, in turn, control the location of the preconcentrated plug. An array of such powered membranes enables formation of multiple preconcentrated plugs of the same biosample as well as of preconcentrated plugs of multiple biosample types introduced via different inlets in a selective manner. Moreover, digital-microfluidics operations such as up-down and left-right translation, merging, and splitting, can be realized, but on preconcentrated biomolecule plugs instead of on discrete droplets. This technology, based on nanoscale electrokinetics of ion transport through permselective medium, opens future opportunities for smart and programmable digital-like manipulations of preconcentrated biological particle plugs for various on-chip biological applications.
Collapse
Affiliation(s)
- Sinwook Park
- Faculty of Mechanical Engineering, Micro- and Nanofluidics Laboratory, Technion - Israel Institute of Technology, Technion City 3200000, Israel.
| | - Barak Sabbagh
- Faculty of Mechanical Engineering, Micro- and Nanofluidics Laboratory, Technion - Israel Institute of Technology, Technion City 3200000, Israel.
| | - Ramadan Abu-Rjal
- Faculty of Mechanical Engineering, Micro- and Nanofluidics Laboratory, Technion - Israel Institute of Technology, Technion City 3200000, Israel.
| | - Gilad Yossifon
- Faculty of Mechanical Engineering, Micro- and Nanofluidics Laboratory, Technion - Israel Institute of Technology, Technion City 3200000, Israel.
| |
Collapse
|
6
|
Krishnamurthy A, Anand RK. Recent advances in microscale extraction driven by ion concentration polarization. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|