Quantitative investigation of plasmonic hot-electron injection by KPFM

Aoqun Jian, Kai Feng, Huaping Jia, Qianwu Zhang, Shengbo Sang, Xuming Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)


Hot-electron injection is widely used in plasmonic devices. However, it is still lack of a direct theoretical model for performance prediction. This paper measures the surface potential of Au/TiO2 film by Kelvin probe force microscope (KPFM) under various conditions, and then develops a theoretical model for quantitative interpretation. The model can well fit the relationship of surface potential versus light power under various irradiation wavelengths. The study in this paper opens the pathway for quantitative characterization of the efficiency of hot-electron injection and sheds light on improving the plasmonic efficiency of photoelectric conversion and photocatalysis.

Original languageEnglish
Pages (from-to)644-650
Number of pages7
JournalApplied Surface Science
Publication statusPublished - 30 Oct 2019


  • Hot-electron injection
  • Kelvin probe force microscope
  • Photocatalysis
  • Surface potential

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • General Physics and Astronomy
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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