Thermal Degradation Threshold in Ag@Chondroitin Sulfate Memristors Revealed by Temperature‐Resolved Raman Spectroscopy

ABSTRACT Organic memristors (OMEMRs) based on biopolymeric matrices functionalized with silver nanoparticles (AgNPs) are emerging as promising candidates for next‐generation non‐volatile memory technologies, owing to their multilevel resistive switching behavior, scalability, and compatibility with solution‐processable fabrication methods. In this study, AgNPs were coordinated with chondroitin sulfate (ChS) to produce Ag@ChS‐based OMEMRs, which were fabricated via spin‐coating and subjected to a comprehensive thermal stability assessment using temperature‐resolved Raman spectroscopy over the 25°C–275°C range. The Raman spectra revealed a prominent vibrational mode at 76 cm −1 , attributed to AgNP lattice dynamics, along with a distinct Ag–O stretching feature near 240 cm −1 , indicative of coordination with carboxylate groups within the ChS matrix. A marked attenuation of sulfate‐associated Raman bands was observed at approximately 175°C, signifying a critical degradation threshold associated with desulfation, interfacial breakdown, and irreversible loss of memristive functionality. These findings demonstrate that Raman spectroscopy provides a sensitive, non‐destructive platform for probing thermally induced molecular transformations and diagnosing early‐stage failure in biopolymer‐based memristive systems. The insights gained herein offer valuable guidance for the rational design of thermally robust organic memory devices.