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Title: Atomically resolved structure of ligand-protected Au{sub 9} clusters on TiO{sub 2} nanosheets using aberration-corrected STEM

Abstract

Triphenylphosphine ligand-protected Au{sub 9} clusters deposited onto titania nanosheets show three different atomic configurations as observed by scanning transmission electron microscopy. The configurations observed are a 3-dimensional structure, corresponding to the previously proposed Au{sub 9} core of the clusters, and two pseudo-2-dimensional (pseudo-2D) structures, newly found by this work. With the help of density functional theory (DFT) calculations, the observed pseudo-2D structures are attributed to the low energy, de-ligated structures formed through interaction with the substrate. The combination of scanning transmission electron microscopy with DFT calculations thus allows identifying whether or not the deposited Au{sub 9} clusters have been de-ligated in the deposition process.

Authors:
;  [1];  [2]; ; ;  [3];  [4]; ;  [5]
  1. Flinders Centre for NanoScale Science and Technology, Flinders University, Adelaide SA 5001 (Australia)
  2. National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044 (Japan)
  3. Department of Chemistry, The University of Adelaide, Adelaide SA 5005 (Australia)
  4. Department of Chemistry, The MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Canterbury, Christchurch 8140 (New Zealand)
  5. WPI-MANA, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
Publication Date:
OSTI Identifier:
22660819
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 144; Journal Issue: 11; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DENSITY FUNCTIONAL METHOD; DEPOSITION; DEPOSITS; NANOSTRUCTURES; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Al Qahtani, Hassan S., Andersson, Gunther G., E-mail: gunther.andersson@flinders.edu.au, E-mail: nakayama.tomonobu@nims.go.jp, Kimoto, Koji, Bennett, Trystan, Alvino, Jason F., Metha, Gregory F., Golovko, Vladimir B., Sasaki, Takayoshi, and Nakayama, Tomonobu, E-mail: gunther.andersson@flinders.edu.au, E-mail: nakayama.tomonobu@nims.go.jp. Atomically resolved structure of ligand-protected Au{sub 9} clusters on TiO{sub 2} nanosheets using aberration-corrected STEM. United States: N. p., 2016. Web. doi:10.1063/1.4943203.
Al Qahtani, Hassan S., Andersson, Gunther G., E-mail: gunther.andersson@flinders.edu.au, E-mail: nakayama.tomonobu@nims.go.jp, Kimoto, Koji, Bennett, Trystan, Alvino, Jason F., Metha, Gregory F., Golovko, Vladimir B., Sasaki, Takayoshi, & Nakayama, Tomonobu, E-mail: gunther.andersson@flinders.edu.au, E-mail: nakayama.tomonobu@nims.go.jp. Atomically resolved structure of ligand-protected Au{sub 9} clusters on TiO{sub 2} nanosheets using aberration-corrected STEM. United States. doi:10.1063/1.4943203.
Al Qahtani, Hassan S., Andersson, Gunther G., E-mail: gunther.andersson@flinders.edu.au, E-mail: nakayama.tomonobu@nims.go.jp, Kimoto, Koji, Bennett, Trystan, Alvino, Jason F., Metha, Gregory F., Golovko, Vladimir B., Sasaki, Takayoshi, and Nakayama, Tomonobu, E-mail: gunther.andersson@flinders.edu.au, E-mail: nakayama.tomonobu@nims.go.jp. Mon . "Atomically resolved structure of ligand-protected Au{sub 9} clusters on TiO{sub 2} nanosheets using aberration-corrected STEM". United States. doi:10.1063/1.4943203.
@article{osti_22660819,
title = {Atomically resolved structure of ligand-protected Au{sub 9} clusters on TiO{sub 2} nanosheets using aberration-corrected STEM},
author = {Al Qahtani, Hassan S. and Andersson, Gunther G., E-mail: gunther.andersson@flinders.edu.au, E-mail: nakayama.tomonobu@nims.go.jp and Kimoto, Koji and Bennett, Trystan and Alvino, Jason F. and Metha, Gregory F. and Golovko, Vladimir B. and Sasaki, Takayoshi and Nakayama, Tomonobu, E-mail: gunther.andersson@flinders.edu.au, E-mail: nakayama.tomonobu@nims.go.jp},
abstractNote = {Triphenylphosphine ligand-protected Au{sub 9} clusters deposited onto titania nanosheets show three different atomic configurations as observed by scanning transmission electron microscopy. The configurations observed are a 3-dimensional structure, corresponding to the previously proposed Au{sub 9} core of the clusters, and two pseudo-2-dimensional (pseudo-2D) structures, newly found by this work. With the help of density functional theory (DFT) calculations, the observed pseudo-2D structures are attributed to the low energy, de-ligated structures formed through interaction with the substrate. The combination of scanning transmission electron microscopy with DFT calculations thus allows identifying whether or not the deposited Au{sub 9} clusters have been de-ligated in the deposition process.},
doi = {10.1063/1.4943203},
journal = {Journal of Chemical Physics},
number = 11,
volume = 144,
place = {United States},
year = {Mon Mar 21 00:00:00 EDT 2016},
month = {Mon Mar 21 00:00:00 EDT 2016}
}