{
  "abstract": "Cyanobacteria (blue-green algae) produce geosmin, a volatile organic compound associated with ecological imbalance that adversely affects aquatic organisms by impairing growth and reproduction, weakening immune responses, and reducing aquaculture yields and quality. Herein, we developed a rapid, portable and ultrasensitive approach for geosmin detection based on an aptamer-modified silver-coated porous silicon (Ag-pSi) microarray that serves as a surface-enhanced Raman spectroscopy (SERS) transducer. The Ag-pSi substrate, characterized by a high surface area that efficiently distributed noble metal nanoparticles across the thin film, significantly enhanced Raman scattering, yielding an analytical enhancement factor of 2.17 × 10⁸. The microarray scaffold, comprising 25 discrete sensing spots, exhibited a linear response across geosmin concentrations from 0.001 to 10 μg L⁻¹, with an exceptionally low detection limit of 0.1 ng L⁻¹. The performance evaluation demonstrated high reusability, storage stability and high selectivity, as evidenced by 9 successful regeneration cycles, a 7 week shelf life and negligible interference from coexisting metabolites. The scientific feasibility of the fabricated SERS array was further confirmed across various aqueous media, with recovery rates ranging from 94% to 103%, consistent with the benchmark approach. Overall, the integrated SERS-based approach offers a transformative and practical solution for sensitive monitoring of off-flavor contaminants across aquaculture, food safety, and environmental contexts.",
  "abstract_shown": true,
  "affiliations": [
    "Institute of Agricultural and Biosystems Engineering, Agricultural Research Organization - Volcani Institute, Rishon LeZion 7505101, Israel."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Rohit Kumar Singh"
    },
    {
      "affs": [
        0
      ],
      "name": "Alaa Jamal"
    },
    {
      "affs": [
        0
      ],
      "name": "Giorgi Shtenberg",
      "orcid": "0000-0003-1234-1104"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6024dq8dbh1gz.bib",
  "cited_by": 0,
  "doi": "10.1021/acsmeasuresciau.6c00177",
  "fulltext_url": "https://europepmc.org/articles/PMC13693226",
  "id": "6024dq8dbh1gz",
  "issns": [
    "2694-250X"
  ],
  "landing_url": "https://europepmc.org/article/MED/42921412",
  "language": "eng",
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2504|Gold and Silver Nanoparticles Synthesis and Applications"
    ]
  ],
  "openalex": "W7207519006",
  "pdf_url": "https://europepmc.org/articles/PMC13693226?pdf=render",
  "pmcid": "PMC13693226",
  "pmid": "42921412",
  "published": "2026-09-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6024dq8dbh1gz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:02Z",
      "native_id": "MED:42921412",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42921412"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2504|Gold and Silver Nanoparticles Synthesis and Applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Ultrasensitive Geosmin Sensing Using Reusable SERS-Active Porous Silicon Microarray.",
  "title_text": "Ultrasensitive Geosmin Sensing Using Reusable SERS-Active Porous Silicon Microarray.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:02Z",
  "url": "https://research.draconitic.com/paper/6024dq8dbh1gz",
  "venue": "ACS measurement science au",
  "versions": []
}