Memristors are emerging components in neuromorphic computing due to their ability to retain memory through resistive switching. In this work, we report the fabrication and characterization of low-cost memristive devices based on self-assembled structures of carbon quantum dots (CQDs). These structures were produced via evaporation-induced self-assembly of CQDs dispersed in water, deposited on silicon substrates at controlled low temperatures. Morphological analysis revealed that drying temperature plays a critical role in the resulting spatial configurations, with temperatures around $5{}^{\circ }\mathrm{C}$ yielding elongated, millimeter-scale wirelike structures that suppress the typical coffee-ring effect. Electrical characterization of these structures showed pronounced hysteresis in the current-voltage curve, indicative of memristive behavior. Further analysis confirmed space-charge-limited conduction as the dominant transport mechanism, and transient current response supported the participation of oxygen-containing functional groups in charge trapping and release. These findings demonstrate that self-assembled structures of CQDs can act as effective memristors, offering a scalable and biocompatible platform for future applications in neuromorphic systems and flexible memory technologies.

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• Electrical properties
• Resistive switching
• Self-assembly
• Carbon-based materials
• Core-shell nanoparticles
• Memristors
• Evaporation
• Photoluminescence