Continuous Electroformation of Gold Nanoparticles in Nanoliter Droplet Reactors
Abstract: Gold nanoparticles (AuNPs) are employed in numerous applications, including optics, biosensing and catalysis. Here, we demonstrate the stabilizer‐free electrochemical synthesis of AuNPs inside nanoliter‐sized reactors. Droplets encapsulating a gold precursor are formed on a microfluidic device and exposed to an electrical current by guiding them through a pair of electrodes. We exploit the naturally occurring recirculation flows inside confined droplets (moving in rectangular microchannels) to prevent the aggregation of nanoparticles after nucleation. Therefore, AuNPs with sizes in the range of 30 to 100 nm were produced without the need of additional capping agents. The average particle size is defined by the precursor concentration and droplet velocity, while the charge dose given by the electric field strength has a minor effect. This method opens the way to fine‐tune the electrochemical production of gold nanoparticles, and we believe it is a versatile method for the formation of other metal nanoparticles.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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Continuous Electroformation of Gold Nanoparticles in Nanoliter Droplet Reactors ; day:22 ; month:12 ; year:2022 ; extent:6
Angewandte Chemie / International edition. International edition ; (22.12.2022) (gesamt 6)
- Urheber
- DOI
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10.1002/anie.202212459
- URN
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urn:nbn:de:101:1-2022122314145628011541
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:35 MESZ
Datenpartner
Deutsche Nationalbibliothek. Bei Fragen zum Objekt wenden Sie sich bitte an den Datenpartner.
Beteiligte
- Saucedo‐Espinosa, Mario Alberto
- Breitfeld, Maximilian
- Dittrich, Petra S.
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