Polarization‐dependent sum frequency generation (SFG) spectroscopy for in situ tracking of nanoparticle morphology
نویسندگان
چکیده
Die Oberflächenstruktur von Metall-Nanopartikel auf Oxidträgern lässt sich über charakteristische Schwingungen adsorbierten Sondenmolekülen wie CO bestimmen. Üblicherweise konzentrieren spektroskopische Untersuchungen die Peak-Position und -Intensität, mit der Bindungsgeometrie bzw. Anzahl Adsorptionsplätze zusammenhängen. Anhand zweier unterschiedlich präparierter Modellkatalysatoren wird gezeigt, dass polarisationsabhängige Summenfrequenzspektroskopie (SFG) gemittelte Form Nanopartikel beleuchten kann. SFG-Ergebnisse für verschiedene Partikelgrößen Morphologien werden direkter Realraum-Strukturanalyse mittels TEM STM verglichen. beschriebene Anwendung SFG kann zur in situ Detektion Partikelstruktur verwendet könnte ein wertvolles Werkzeug operando Katalyse werden.
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ژورنال
عنوان ژورنال: Angewandte Chemie
سال: 2023
ISSN: ['1521-3773', '1433-7851', '0570-0833']
DOI: https://doi.org/10.1002/ange.202300230