1：Experimental Design and Method Selection:

The study involved the synthesis of monodisperse MQDs using a one-step facile hydrothermal synthetic method and the fabrication of ITO/MQD-PVP/Au sandwich structures to investigate their electrical conductance and memory effects.

2：Sample Selection and Data Sources:

MQDs were synthesized from Ti3AlC2 MAX phase powder, and hybrid composite films were prepared by varying the MQD content in PVP.

3：List of Experimental Equipment and Materials:

Materials included Ti3AlC2 MAX phase powder, PVP, ITO, ethanol, HF solution, and Au for electrode deposition. Equipment included a Bruker D8 Advance diffractometer, Hitachi S4800 electron microscope, JEM-200CX electron microscope, Tecnai 12 electron microscope, Pekin Elmer Lambda 950, PHI 5000 VersaProbe, Fluorescence Spectrometer (F-4600), Shimadzu UV-1750 spectrophotometer, Atomic force microscope (XE-100, Park SYSTEMS), and Keithley 4200 semiconductor parameter analyzer.

4：Experimental Procedures and Operational Workflow:

The synthesis of MQDs involved HF etching of Ti3AlC2 powders, followed by hydrothermal treatment. MQDs-PVP hybrid nanomaterials were prepared by dispersing MQDs in ethanol containing PVP. Memory devices were fabricated by spin-coating MQDs-PVP films onto ITO electrodes and depositing a top Au electrode.

5：Data Analysis Methods:

Electrical behaviors and memory effects were characterized by current-voltage (I-V) measurements. The carrier conduction and switching mechanisms were investigated by log I-log V plots.