Thermal degradation threshold in Ag@chondroitin sulfate memristors revealed by temperature-resolved raman spectroscopy
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Journal of Raman Spectroscopy
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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.
Como referenciar
QUEIROZ, ALFREDO A.A.E. de; ANDRADE, MARCELO B. de; QUEIROZ, ALVARO A.A. de. Thermal degradation threshold in Ag@chondroitin sulfate memristors revealed by temperature-resolved raman spectroscopy. Journal of Raman Spectroscopy, v. 57, n. 1, p. 169-180, 2025. DOI: 10.1002/jrs.70039. Disponível em: https://repositorio.ipen.br/handle/123456789/49306. Acesso em: 20 Mar 2026.
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