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      "url": "https://creativecommons.org/publicdomain/zero/1.0",
      "description": "To the extent possible under law, all copyright and related or neighbouring rights have been waived worldwide to the data made available through this API."
    },
    "documentation": "https://doi.org/10.5281/zenodo.14918287",
    "release_date": "2025-08-20T00:00:00",
    "funder": "https://doi.org/10.13039/501100003246",
    "ror_id": "https://ror.org/04jsz6e67",
    "date": "2026-11-05T00:00:00",
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  "projects": [
    {
      "project_id": "OCENW.KLEIN.008",
      "title": "Optical control over the blinking behavior of colloidal quantum dots",
      "funding_scheme_id": 3780,
      "funding_scheme": "Open Competitie ENW - M Doorlopend OC ENW KLEIN pakket 01",
      "department": "Exacte en Natuurwetenschappen",
      "sub_department": "Exacte en Natuurwetenschappen",
      "start_date": "2019-09-01T00:00:00",
      "end_date": "2024-07-31T00:00:00",
      "reporting_year": 2019,
      "summary_nl": "Nearly all types of colloidal quantum dots show blinking, i.e. random switching between a fluorescent “ON” and a non-fluorescent “OFF” state. Despite over 20 years of research, the understanding of the microscopic origin of blinking is still limited. Recently, we have observed “delayed emission” from a long-lived metastable state in various types of quantum dots (e.g., CdSe, InP, CuInS2, CsPbBr3), the dynamics of which suggest a mechanistic link to blinking. Here, we will use two-color two-pulse spectroscopy experiments to study and manipulate the metastable state of individual quantum dots of various compositions. Our hypothesis is that optically exciting this metastable state will allow us—depending on the conditions—to either prevent or promote blinking, without relying on chemical modifications to the quantum dot. Such optical control over blinking will be especially promising for (biomedical) imaging with fluorescent quantum dot labels, a technique that makes use of blinking to achieve super-resolution beyond the diffraction limit.",
      "summary_en": "Nearly all types of colloidal quantum dots show blinking, i.e. random switching between a fluorescent “ON” and a non-fluorescent “OFF” state. Despite over 20 years of research, the understanding of the microscopic origin of blinking is still limited. Recently, we have observed “delayed emission” from a long-lived metastable state in various types of quantum dots (e.g., CdSe, InP, CuInS2, CsPbBr3), the dynamics of which suggest a mechanistic link to blinking. Here, we will use two-color two-pulse spectroscopy experiments to study and manipulate the metastable state of individual quantum dots of various compositions. Our hypothesis is that optically exciting this metastable state will allow us—depending on the conditions—to either prevent or promote blinking, without relying on chemical modifications to the quantum dot. Such optical control over blinking will be especially promising for (biomedical) imaging with fluorescent quantum dot labels, a technique that makes use of blinking to achieve super-resolution beyond the diffraction limit.",
      "award_amount": 350000,
      "grant_id": "https://doi.org/10.61686/CSFGB13707",
      "summary_updates": [
        {
          "submission_date": "2024-09-20T19:35:34",
          "update_en": "This project has allowed us to build fundamental knowledge on blinking of colloidal quantum dots. We developed a method to characterize the properties of the biexciton state, which is involved in blinking and is affected by blinking. We investigated spectral fluctuations and charge-carrier trapping in InP quantum dots, which also have links to blinking. Furthermore, in side projects we worked, often in collaboration with other researchers, on the spectroscopy of (individual) quantum dots and lanthanide-doped materials.",
          "update_nl": "In dit project hebben we de mogelijk gehad om fundamenteel begrip op te bouwen van blinking door colloïdale quantum dots. We hebben een methode ontwikkeld om de eigenschappen van de biexcitontoestand te meten, die betrokken is bij blinking en beïnvloed wordt door blinking. We hebben spectrale fluctuaties en trapping van ladingsdragers onderzocht in InP quantum dots, die ook met blinking verband houden. Bovendien hebben we gewerkt aan zijprojecten, vaak met andere onderzoekers, op de spectroscopie van (individuele) quantum dots of lanthanidegedoteerde materialen."
        }
      ],
      "project_members": [
        {
          "role": "Researcher",
          "member_id": 583911,
          "last_name": "Vonk",
          "initials": "S.J.W.",
          "first_name": "Sander",
          "organisation": "Universiteit Utrecht||Faculteit Bètawetenschappen||Departement Scheikunde||Debye Instituut voor Nanomaterialen Wetenschap",
          "organisation_id": 81461,
          "ror": "https://ror.org/04pp8hn57",
          "active": false
        },
        {
          "role": "Main Applicant",
          "member_id": 264254,
          "last_name": "Rabouw",
          "degree_pre_nominal": "dr.",
          "initials": "F.T.",
          "first_name": "Freddy",
          "organisation": "Universiteit Utrecht||Faculteit Bètawetenschappen||Departement Scheikunde||Debye Instituut voor Nanomaterialen Wetenschap||Soft Condensed Matter and Biophysics",
          "organisation_id": 81096,
          "ror": "https://ror.org/04pp8hn57",
          "active": true
        },
        {
          "role": "Project leader",
          "member_id": 264254,
          "last_name": "Rabouw",
          "degree_pre_nominal": "dr.",
          "initials": "F.T.",
          "first_name": "Freddy",
          "organisation": "Universiteit Utrecht||Faculteit Bètawetenschappen||Departement Scheikunde||Debye Instituut voor Nanomaterialen Wetenschap||Soft Condensed Matter and Biophysics",
          "organisation_id": 81096,
          "ror": "https://ror.org/04pp8hn57",
          "active": true
        }
      ],
      "products": [
        {
          "title": "Trapping and Detrapping in Colloidal Perovskite Nanoplatelets: Elucidation and Prevention of Nonradiative Processes through Chemical Treatment",
          "year": 2020,
          "edition": "124",
          "start": 8047,
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          "type": "Wetenschappelijk artikel",
          "url_open_access": "https://www.doi.org/10.1021/acs.jpcc.0c02287",
          "journal_title": "J. Phys. Chem. C",
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              "last_name": "Rabouw",
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            {
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        {
          "title": "Nanophotonic Approach to Study Excited-State Dynamics in Semiconductor Nanocrystals",
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          "url_open_access": "https://www.doi.org/10.1021/acs.jpclett.2c00599",
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        {
          "title": "Biexciton Blinking in CdSe-Based Quantum Dots",
          "year": 2023,
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          "url_open_access": "https://www.doi.org/10.1021/acs.jpclett.3c00437",
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          "title": "Fluctuations in the Photoluminescence Excitation Spectra of Individual Semiconductor Nanocrystals",
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          "title": "Single trap states in single CdSe nanoplatelets",
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          "title": "Compact Plasmonic Distributed-Feedback Lasers as Dark Sources of Surface Plasmon Polaritons",
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          "title": "Mapping Temperature Heterogeneities during Catalytic CO2 Methanation with Operando Luminescence Thermometry",
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