English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Electron quantization in arbitrarily shaped gold islands on MgO thin films

Stiehler, C., Pan, Y., Schneider, W.-D., Koskinen, P., Häkkinen, H., Nilius, N., et al. (2013). Electron quantization in arbitrarily shaped gold islands on MgO thin films. Physical Review B, 88(11): 115415. doi:10.1103/PhysRevB.88.115415.

Item is

Files

show Files
hide Files
:
PhysRevB.88.115415.pdf (Publisher version), 4MB
Name:
PhysRevB.88.115415.pdf
Description:
-
OA-Status:
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2013
Copyright Info:
APS
License:
-

Locators

show

Creators

show
hide
 Creators:
Stiehler, Christian1, Author           
Pan, Yi1, Author           
Schneider, Wolf-Dieter1, 2, Author           
Koskinen, Pekka3, Author
Häkkinen, Hannu3, 4, Author
Nilius, Niklas1, 5, Author           
Freund, Hans-Joachim1, Author           
Affiliations:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              
2Ecole Polytechnique Federale de Lausanne, Institute of Condensed Matter Physics, CH- 1015 Lausanne, Switzerland, ou_persistent22              
3Department of Physics, Nanoscience Center, University of Jyväskylä, P.O. Box 35 (YFL), FI-40014 Finland, ou_persistent22              
4Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35 (YFL), FI-40014 Finland, ou_persistent22              
5Carl von Ossietzky Universität Oldenburg, Institut für Physik, D-26111 Oldenburg,Germany, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: Low-temperature scanning tunneling microscopy has been employed to analyze the formation of quantum well states (QWS) in 2D gold islands, containing between 50-200 at-oms, on MgO thin films. The energy position and symmetry of the eigenstates are revealed from conductance spectroscopy and imaging. The majority of the QWS originates from over-lapping Au 6p orbitals in the individual atoms and is unoccupied. Their characteristic is re-produced already with simple particle-in-a-box models that account for the symmetry of the islands (rectangular, triangular or linear). Better agreement is achieved when considering the true atomic structure of the aggregates via a density-functional-tight-binding approach. Based on a statistically relevant number of single-island data, we have established a correlation be-tween the island geometry and the HOMO-LUMO gap that opens up due to the finite island size. The linear eccentricity is identified as a suitable descriptor for this relationship, as it combines information on both the island size and shape. Finally, the depth of the confinement potential is determined from the spatial extension of QWS beyond the physical boundaries of the Au islands. Our work demonstrates how electron quantization effects can be analyzed in detail in metal nanostructures. The results may help elucidating the interplay between elec-tronic and chemical properties of oxide-supported clusters as used in heterogeneous catalysis.

Details

show
hide
Language(s): eng - English
 Dates: 2013-07-052013-09-092013-09-09
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevB.88.115415
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review B
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, NY : Published by the American Physical Society through the American Institute of Physics
Pages: - Volume / Issue: 88 (11) Sequence Number: 115415 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008