Graphene quantum dots covalently functionalized with zinc porphyrin for digital-analog dual-mode memristors

IF 5.1 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale Pub Date : 2025-09-23 DOI:10.1039/d5nr02683k

Fengrui Duan, Fei Fan, Tianyue Huang, Wei Li, Sai Sun, Bin Zhang

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引用次数: 0

Abstract

Memristors based on quantum dots (QDs) exhibit significant potential in the fields of digital memory and analog computing.However, challenges remain in the research focused on modifying the electronic properties of QDs to enhance the performance of memristors. In this study, we report a novel donor-acceptor (D-A) structured nanomaterial utilizing zinc porphyrin (ZnTPP) covalently modified graphene quantum dots (GQDs). Due to the synergistic effects of charge transfer between the electron-donating ZnTPP molecules and the electron-accepting GQDs, along with the distinctive redox activity of ZnTPP, the Al/ZnTPP-g-GQDs:PVP/ITO device achieves precise modulation of 50 non-volatile conductive states, characteristic of an analog memristor. When subjected to a wider voltage scan, this device exhibits typical digital memristive behavior. Furthermore, the convolutional neural network (CNN) constructed using this memristor displays robust performance in recognizing and classifying five types of animal images with high accuracy. This research establishes a novel pathway for the application of QDs in digital-analog dual-mode memristors.

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与卟啉锌共价功能化的石墨烯量子点用于数字模拟双模记忆电阻器

基于量子点的忆阻器在数字存储和模拟计算领域显示出巨大的潜力。然而，如何通过改变量子点的电子特性来提高忆阻器的性能仍然是研究的重点。在这项研究中，我们报道了一种利用卟啉锌（ZnTPP）共价修饰石墨烯量子点（GQDs）的新型供体-受体（D-A）结构纳米材料。由于供电子的ZnTPP分子和接受电子的GQDs之间的电荷转移协同作用，以及ZnTPP独特的氧化还原活性，Al/ZnTPP-g-GQDs:PVP/ITO器件实现了50种非易失性导电状态的精确调制，具有模拟忆阻器的特征。当受到更宽的电压扫描时，该器件表现出典型的数字记忆行为。此外，使用该记忆阻器构建的卷积神经网络（CNN）在五种动物图像的识别和分类方面表现出较高的准确性。本研究为量子点在数模-模拟双模记忆电阻器中的应用开辟了一条新的途径。

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来源期刊

Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

12.10

自引率

3.00%

发文量

1628

审稿时长

1.6 months

期刊介绍： Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.