<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>58811</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>14714</pageFirst>
    <pageLast>14724</pageLast>
    <pageNumber/>
    <edition/>
    <issue>42</issue>
    <volume>11</volume>
    <type>article</type>
    <publisherName>Royal Society of Chemistry (RSC)</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Enhanced brightness of ultra-small gold nanoparticles in the second biological window through thiol ligand shell control</title>
    <abstract language="eng">Gold-based nanoparticles below 2 nm in size are promising as luminescent probes for in vivo bioimaging, owing to their brightness and rapid renal clearance. However, their use as contrast agents in the near-infrared II (NIR-II, 1000–1700 nm) range remains challenging due to their low photoluminescence (PL) quantum yield. To address this, PL enhancement can be achieved by either rigidifying the ligand-shell structure or increasing the size of the ligand shell. In this study, we synthesized ultra-small gold nanoparticles stabilized by co-ligands, namely monothiol and short dithiol molecules. By precisely controlling the amount of reducing agent used during particle preparation, we successfully modulated the physicochemical properties of the co-ligand shell, including its size, composition, and structure. Consequently, we achieved a remarkable 60-fold increase in the absorption cross-section at 990 nm while maintaining the small size of the 1.5-nm metal core. The analytical and optical characterization of our thiol-capped gold nanoparticles indicates that the ligand shell size is governed by the quantity of the reducing agent, which, in turn, impacts the balance between radiative and non-radiative processes, thereby influencing the PL quantum yield.</abstract>
    <parentTitle language="eng">Journal of Materials Chemistry C</parentTitle>
    <identifier type="doi">10.1039/D3TC03021K</identifier>
    <identifier type="issn">2050-7526</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-588117</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="date_peer_review">15.11.2023</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>W. Mohammad</author>
    <author>Karl David Wegner</author>
    <author>C. Comby-Zerbino</author>
    <author>V. Trouillet</author>
    <author>M. P. Ogayer</author>
    <author>J.-L. Coll</author>
    <author>R. Marin</author>
    <author>D. Jaque Garcia</author>
    <author>Ute Resch-Genger</author>
    <author>R. Antoine</author>
    <author>X. Le Guevel</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Gold nanocluster</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>NIR-II fluorescence</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SWIR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanomaterial design</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Calibrated fluorescence measurements</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">1 Analytische Chemie; Referenzmaterialien</collection>
    <collection role="institutes" number="">1.2 Biophotonik</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="themenfelder" number="">Chemie und Prozesstechnik</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <collection role="themenfelder" number="">Advanced Materials</collection>
    <collection role="themenfelder" number="">Materialdesign</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/58811/Wegner_J Mater Chem C_2023.pdf</file>
  </doc>
</export-example>
