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Type: Journal article
Title: Investigation of phosphine ligand protected Au₁₃ clusters on defect rich titania
Other Titles: Investigation of phosphine ligand protected Au(13) clusters on defect rich titania
Author: Krishnan, G.
Eom, N.
Kirk, R.M.
Golovko, V.B.
Metha, G.F.
Andersson, G.G.
Citation: The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter, 2019; 123(11):6642-6649
Publisher: American Chemical Society
Issue Date: 2019
ISSN: 1932-7447
Statement of
Gowri Krishnan, Namsoon Eom, Ryan M. Kirk, Vladimir B. Golovko, Gregory F. Metha, and Gunther G. Andersson
Abstract: Atomically precise chemically synthesized gold clusters protected by diphenylphosphine ligands [(Au₁₃(dppe)₅Cl₂)Cl₃] (dppe = 1,2-bis(diphenylphosphino)ethane) were deposited onto a defect-rich, atomic layer deposited titania surface prepared by heating and subsequently sputtering the titania under ultrahigh vacuum (UHV). The gold clusters deposited onto the pretreated titania were heated at 200 °C for 20 min under UHV with the aim to remove the ligands protecting the gold core of the clusters. The change in the electronic structure and the chemical composition after deposition after aforementioned heat treatment was investigated using metastable induced electron spectroscopy (MIES) and X-ray photoelectron spectroscopy (XPS). The MIES data allow identification of the density of states (DOS) of the deligated Au₁₃ clusters on the titania to be made. The DOS of the Au₁₃ are found to be similar to those previously found for Au₉ clusters on sputtered ALD titania but have shifted binding energies. The differences in DOS of Au₁₃ and Au₉ are discussed.
Rights: © 2019 American Chemical Society
DOI: 10.1021/acs.jpcc.9b00083
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