Graphene oxide–DNA/graphene oxide–PDDA sandwiched membranes with neuromorphic function

Bong, Jia Hui; Grebenchuk, Sergey; Nikolaev, Konstantin G.; Chee, Celestine P. T; Yang, Kou; Chen, Siyu; Baranov, Denis; Woods, Colin R.; Andreeva, Daria V.; Novoselov, Kostya S.

doi:10.1039/d3nh00570d

Nanoscale Horiz.

2024

DOI: 10.1039/d3nh00570d

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Graphene oxide–DNA/graphene oxide–PDDA sandwiched membranes with neuromorphic function

Jia Hui Bong,

Sergey Grebenchuk,

Konstantin G. Nikolaev

et al.

Abstract: The device based on polyelectrolyte–graphene oxide membranes demonstrates neuromorphic functions successfully applied with nanochannel ion interactions, resulting in a short-term memory effect.

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Cited by 3 publications

References 75 publications

(94 reference statements)

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DNA‐rGO Aerogel Bioanodes with Microcompartmentalization for High‐Performance Bioelectrochemical Systems

Leng,

Chen,

McCuskey

et al. 2024

Adv Elect Materials

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Bioelectrochemical systems (BES) have garnered significant attention for their applications in renewable energy, microbial fuel cells, biocatalysis, and bioelectronics. In BES, bioelectrodes are used to facilitate extracellular electron transfer among microbial biocatalysts. This study is focused on enhancing the efficiency of these processes through microcompartmentalization, a technique that strategically organizes and segregates microorganisms within the electrode, thereby bolstering BES output efficiency. The study introduces a deoxyribonucleic acid (DNA)‐based reduced graphene oxide (rGO) aerogel engineered as a bioanode to facilitate microorganism compartmentalization while providing an expanded biocompatible surface with continuous conductivity. The DNA‐rGO aerogel is synthesized through the self‐assembly of graphene oxide and DNA, with thermal reduction imparting lightweight structural stability and conductivity to the material. The DNA component serves as a hydrophilic framework, enabling precise regulation of compartment size and biofunctionalization of the rGO surface. To evaluate the performance of this aerogel bioanode, measurements of current generation are conducted using Shewanella oneidensis MR‐1 bacteria as a model biocatalyst. The bioanode exhibits a current density reaching up to 1.5 A·m⁻2, surpassing the capabilities of many existing bioanodes. With its abundant microcompartments, the DNA‐rGO demonstrates high current generation performance, representing a sustainable approach for energy harvesting without reliance on metals, polymers, or heterostructures.

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DNA‐rGO Aerogel Bioanodes with Microcompartmentalization for High‐Performance Bioelectrochemical Systems

Leng,

Chen,

McCuskey

et al. 2024

Adv Elect Materials

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Ultra‐Tough Graphene Oxide/DNA 2D Hydrogel with Intrinsic Sensing and Actuation Functions

Chen,

Lee,

Tan

et al. 2024

Macromol. Rapid Commun.

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Hydrogel devices with mechanical toughness and tunable functionalities are highly desirable for practical long‐term applications such as sensing and actuation elements for soft robotics. However, existing hydrogels have poor mechanical properties, slow rates of response, and low functionality. In this work, two‐dimensional hydrogel actuators are proposed and formed on the self‐assembly of graphene oxide (GO) and deoxynucleic acid (DNA). The self‐assembly process is driven by the GO‐induced transition of double stranded DNA (dsDNA) into single stranded DNA (ssDNA). Thus, the hydrogel's structural unit consists of two layers of GO covered by ssDNA and a layer of dsDNA in between. Such heterogeneous architectures stabilized by multiple hydrogen bondings have Young's modulus of up to 10 GPa and rapid swelling rates of 4.0 × 10−3 to 1.1 × 10−2 s−1, which surpasses most types of conventional hydrogels. It is demonstrated that the GO/DNA hydrogel actuators leverage the unique properties of these two materials, making them excellent candidates for various applications requiring sensing and actuation functions, such as artificial skin, wearable electronics, bioelectronics, and drug delivery systems.

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Leveraging Tunability of Localized-Interfacial Memristors for Efficient Handling of Complex Neural Networks

Koh,

Dananjaya,

Liu

et al. 2024

ACS Nano

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A scalable (<130 nm) resistive switching memristor that features both filamentary and interfacial switching aimed at neuromorphic computing is developed in this study. The typically perceived noise or volatility was effectively harnessed as a controlled mechanism for interfacial switching. The multilayer structure for the proposed memristor enhances switching stability by curbing ionic overmigration and mitigating leakage paths. Furthermore, the memristors showcased their reliability by demonstrating more than 15 M cycles in the filamentary mode and 1 M pulses in the interfacial mode. Additionally, retention tests at 85 °C for 10 4 s confirmed the stability across different states, affirming its reliability as a nonvolatile CMOS-compatible element. While many studies validate performance solely on the MNIST data set, this work also evaluates more complex data sets, demonstrating the robustness of the demonstrated memristor in supervised learning. Specifically, supervised learning simulations on MNIST and fashion MNIST data sets indicated a high learning rate with <4% deviations from numerical training, while offline inference trained on CIFAR-10 and CIFAR-100 data sets revealed <2.5% and <7% deviations caused by programing error accumulation, even with increased memristor counts for these highly complex data sets. Unsupervised learning via spike-timing-dependent plasticity further highlights the potential of the developed memristor in bridging artificial and biological paradigms, offering a significant advance toward efficient and biologically inspired computing architectures.

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Graphene oxide–DNA/graphene oxide–PDDA sandwiched membranes with neuromorphic function

Abstract: The device based on polyelectrolyte–graphene oxide membranes demonstrates neuromorphic functions successfully applied with nanochannel ion interactions, resulting in a short-term memory effect.

Cited by 3 publications

References 75 publications

DNA‐rGO Aerogel Bioanodes with Microcompartmentalization for High‐Performance Bioelectrochemical Systems

DNA‐rGO Aerogel Bioanodes with Microcompartmentalization for High‐Performance Bioelectrochemical Systems

Ultra‐Tough Graphene Oxide/DNA 2D Hydrogel with Intrinsic Sensing and Actuation Functions

Leveraging Tunability of Localized-Interfacial Memristors for Efficient Handling of Complex Neural Networks

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