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Title: Growth and characterization of epitaxially stabilized ceria(001) nanostructures on Ru(0001)

Abstract

We have studied (001) surface terminated cerium oxide nanoparticles grown on a ruthenium substrate using physical vapor deposition. Their morphology, shape, crystal structure, and chemical state are determined by low-energy electron microscopy and micro-diffraction, scanning probe microscopy, and synchrotron-based X-ray absorption spectroscopy. Square islands are identified as CeO2 nanocrystals exhibiting a (001) oriented top facet of varying size; they have a height of about 7 to 10 nm and a side length between about 50 and 500 nm, and are terminated with a p(2 × 2) surface reconstruction. Micro-illumination electron diffraction reveals the existence of a coincidence lattice at the interface to the ruthenium substrate. The orientation of the side facets of the rod-like particles is identified as (111); the square particles are most likely of cuboidal shape, exhibiting (100) oriented side facets. Lastly, the square and needle-like islands are predominantly found at step bunches and may be grown exclusively at temperatures exceeding 1000 °C.

Authors:
 [1];  [1];  [1];  [2];  [2];  [2];  [3];  [4];  [4];  [1]
  1. Univ. of Bremen, Bremen (Germany)
  2. Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy)
  3. BITS Pilani, Pilani (India)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1335483
Report Number(s):
BNL-112161-2016-JA
Journal ID: ISSN 2040-3364; NANOHL; R&D Project: 16083/16083; KC0403020
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 8; Journal Issue: 20; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Flege, Jan Ingo, Hocker, Jan, Kaemena, Bjorn, Mentes, T. Onur, Sala, Alessandro, Locatelli, Andrea, Gangopadhyay, Subhashis, Sadowski, Jerzy T., Senanayake, Sanjaya D., and Falta, Jens. Growth and characterization of epitaxially stabilized ceria(001) nanostructures on Ru(0001). United States: N. p., 2016. Web. doi:10.1039/C6NR02393B.
Flege, Jan Ingo, Hocker, Jan, Kaemena, Bjorn, Mentes, T. Onur, Sala, Alessandro, Locatelli, Andrea, Gangopadhyay, Subhashis, Sadowski, Jerzy T., Senanayake, Sanjaya D., & Falta, Jens. Growth and characterization of epitaxially stabilized ceria(001) nanostructures on Ru(0001). United States. doi:10.1039/C6NR02393B.
Flege, Jan Ingo, Hocker, Jan, Kaemena, Bjorn, Mentes, T. Onur, Sala, Alessandro, Locatelli, Andrea, Gangopadhyay, Subhashis, Sadowski, Jerzy T., Senanayake, Sanjaya D., and Falta, Jens. Tue . "Growth and characterization of epitaxially stabilized ceria(001) nanostructures on Ru(0001)". United States. doi:10.1039/C6NR02393B. https://www.osti.gov/servlets/purl/1335483.
@article{osti_1335483,
title = {Growth and characterization of epitaxially stabilized ceria(001) nanostructures on Ru(0001)},
author = {Flege, Jan Ingo and Hocker, Jan and Kaemena, Bjorn and Mentes, T. Onur and Sala, Alessandro and Locatelli, Andrea and Gangopadhyay, Subhashis and Sadowski, Jerzy T. and Senanayake, Sanjaya D. and Falta, Jens},
abstractNote = {We have studied (001) surface terminated cerium oxide nanoparticles grown on a ruthenium substrate using physical vapor deposition. Their morphology, shape, crystal structure, and chemical state are determined by low-energy electron microscopy and micro-diffraction, scanning probe microscopy, and synchrotron-based X-ray absorption spectroscopy. Square islands are identified as CeO2 nanocrystals exhibiting a (001) oriented top facet of varying size; they have a height of about 7 to 10 nm and a side length between about 50 and 500 nm, and are terminated with a p(2 × 2) surface reconstruction. Micro-illumination electron diffraction reveals the existence of a coincidence lattice at the interface to the ruthenium substrate. The orientation of the side facets of the rod-like particles is identified as (111); the square particles are most likely of cuboidal shape, exhibiting (100) oriented side facets. Lastly, the square and needle-like islands are predominantly found at step bunches and may be grown exclusively at temperatures exceeding 1000 °C.},
doi = {10.1039/C6NR02393B},
journal = {Nanoscale},
number = 20,
volume = 8,
place = {United States},
year = {2016},
month = {5}
}

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