Jump to main content
Jump to site search

Issue 27, 2015
Previous Article Next Article

Ultra-fast electron capture by electrosterically-stabilized gold nanoparticles

Author affiliations

Abstract

Ultra-fast pre-solvated electron capture has been observed for aqueous solutions of room-temperature ionic liquid (RTIL) surface-stabilized gold nanoparticles (AuNPs; ∼9 nm). The extraordinarily large inverse temperature dependent rate constants (ke ∼ 5 × 1014 M−1 s−1) measured for the capture of electrons in solution suggest electron capture by the AuNP surface that is on the timescale of, and therefore in competition with, electron solvation and electron-cation recombination reactions. The observed electron transfer rates challenge the conventional notion that radiation induced biological damage would be enhanced in the presence of AuNPs. On the contrary, AuNPs stabilized by non-covalently bonded ligands demonstrate the potential to quench radiation-induced electrons, indicating potential applications in fields ranging from radiation therapy to heterogeneous catalysis.

Graphical abstract: Ultra-fast electron capture by electrosterically-stabilized gold nanoparticles

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Apr 2015, accepted on 25 May 2015 and first published on 27 May 2015


Article type: Paper
DOI: 10.1039/C5NR02291F
Author version
available:
Download author version (PDF)
Citation: Nanoscale, 2015,7, 11545-11551

  •   Request permissions

    Ultra-fast electron capture by electrosterically-stabilized gold nanoparticles

    K. Ghandi, A. D. Findlater, Z. Mahimwalla, C. S. MacNeil, E. Awoonor-Williams, F. Zahariev and M. S. Gordon, Nanoscale, 2015, 7, 11545
    DOI: 10.1039/C5NR02291F

Search articles by author

Spotlight

Advertisements