High On/Off Ratio Carbon Quantum Dot-Chitosan Biomemristors with Coplanar Nanogap Electrodes
High On/Off Ratio Carbon Quantum Dot-Chitosan Biomemristors with Coplanar Nanogap Electrodes
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DOI：
10.1021/acsaelm.2c00979
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发表时间：
2022-12-21
影响因子：
4.7
通讯作者：
Papavassiliou, Christos
中科院分区：
文献类型：
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作者：
Raeis-Hosseini, Niloufar;Georgiadou, Dimitra G.;Papavassiliou, Christos
将包含碳量子点（CQD）的碳基天然纳米复合材料分散在壳聚糖基质中。该CQD-壳聚糖纳米复合材料作为Au/CQD-壳聚糖/Al结构生物传感器的固体聚合物电解质层。CQD-壳聚糖纳米复合材料的活性层从其溶液沉积在共面非对称纳米间隙（类似于15 nm）Al-Au电极的顶部上，通过粘附光刻图案化。CQD-壳聚糖生物传感器具有高的开/关比（>106）和可重复且可靠的双极电阻开关行为。记录了160次循环的耐久性，而高和低电阻状态保持稳定超过104 s。这项研究突出了CQD-壳聚糖材料和纳米间隙电极结构在纳米级生物相容性存储器件中的应用潜力。
A carbon-based natural nanocomposite material comprising carbon quantum dots (CQDs) is dispersed in a chitosan matrix. The CQD-chitosan nanocomposite serves as a solid polymer electrolyte layer of a biomemristor with a Au/CQD- chitosan/Al structure. The active layer of the CQD-chitosan nanocomposite is deposited from its solution on top of coplanar asymmetric nanogap (similar to 15 nm) Al-Au electrodes, patterned via adhesion lithography. The CQD-chitosan biomemristor presents a high on/off ratio (>106) and reproducible and reliable bipolar resistive switching behavior. An endurance of 160 cycles was recorded, while the high and low resistance states remained stable for more than 104 s. This study highlights the potential of both the CQD-chitosan material and nanogap electrode structures for application in nanoscale biocompatible memory devices.