{
  "abstract": "Coupling a light-responsive conjugated polymer to an ionic matrix and oxide interfaces offers a materials strategy for retaining complementary information about completed optical events. A PEDOT:PSS/Nafion/TiO 2 composite implements this approach through an irradiance-dependent conductance amplitude and a wavelength-dependent fading trajectory. At matched nominal polymer loading, TiO 2 incorporation reduces the light-OFF amplitude by 70–77% while extending the half-decay time by 1.56–2.01-fold. Post-illumination optical spectra reveal persistent, composition-dependent changes consistent with electronic-state redistribution coupled to slower matrix and interfacial relaxation. The peak conductance change remains linear with irradiance over 10–40 mW cm −2 (R 2 = 0.9981–0.9993), enabling 91.7% leave-one-condition-out wavelength accuracy and an irradiance mean absolute error of 0.86 mW cm −2 . Same-batch devices show strong kinetic fidelity (median relaxationtime coefficient of variation = 10.02%), but zero-shot transfer to a device from an independently prepared batch fell to 58.3% wavelength accuracy (7/12; p = 0.066 versus three-class chance), making cross-batch kinetic variability the principal barrier to calibration-free transfer. With readout delay withheld, 50 s segments yield 88% wavelength accuracy and a conditional event-age error of 5.5 s. This work demonstrates retrospective decoding of completed optical events in a conjugated polymer composite. A stored conductance peak and a post-illumination relaxation trajectory enable calibrated reconstruction of irradiance, wavelength, and elapsed event age.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Md Al Raihan",
      "orcid": "0009-0002-3308-1225"
    },
    {
      "name": "Tian Xia"
    },
    {
      "name": "Michael S. Freund"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9zvgqdpm9sttf.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15010184/v1",
  "fulltext_url": null,
  "id": "9zvgqdpm9sttf",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010184/v1",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2507|Conducting polymers and applications"
    ]
  ],
  "openalex": "W7221067834",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15010184/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-09",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/9zvgqdpm9sttf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "10.26434/chemrxiv.15010184",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010184/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2507|Conducting polymers and applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Mixed Ionic–Electronic Memory in a Conjugated Polymer Composite for Retrospective Optical Event Reconstruction",
  "title_text": "Mixed Ionic–Electronic Memory in a Conjugated Polymer Composite for Retrospective Optical Event Reconstruction",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/9zvgqdpm9sttf",
  "venue": "ChemRxiv",
  "versions": []
}