Charge Carrier Dynamics of Photoexcited Co 3 O 4 in Methanol: Extending High Harmonic Transient Absorption Spectroscopy to Liquid Environments
2014; American Chemical Society; Volume: 14; Issue: 10 Linguagem: Inglês
10.1021/nl502817a
ISSN1530-6992
AutoresL. Robert Baker, Chang-Ming Jiang, Stephen T. Kelly, J. Matthew Lucas, Josh Vura‐Weis, Mary K. Gilles, A. Paul Alivisatos, Stephen R. Leone,
Tópico(s)Catalytic Processes in Materials Science
ResumoCharge carrier dynamics in Co3O4 thin films are observed using high harmonic generation transient absorption spectroscopy at the Co M2,3 edge. Results reveal that photoexcited Co3O4 decays to the ground state in 600 ± 40 ps in liquid methanol compared to 1.9 ± 0.3 ns in vacuum. Kinetic analysis suggests that surface-mediated relaxation of photoexcited Co3O4 may be the result of hole transfer from Co3O4 followed by carrier recombination at the Co3O4–methanol interface.
Referência(s)