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Formation and temperature evolution of Au nanoparticles supported on the h-BN nanomesh

Ng, May Ling LU ; Preobrajenski, Alexei LU ; Vinogradov, A. S. and Mårtensson, Nils LU (2008) In Surface Science 602(6). p.1250-1255
Abstract
Sub-monolayers of gold have been grown at room temperature on the hexagonal boron nitride (h-BN) nanomesh formed on Rh(111), and studied systematically with core level and angle-resolved valence band photoelectron spectroscopy. The results are compared with those for the Au/Rh(111) and Au/h-BN/Pt(111) interfaces. It has been found that on clean Rh(111) substrate gold starts to grow two-dimensionally

(2D), while in the presence of a h-BN interlayer it forms islands from the very beginning. In the case of flat h-BN monolayer (on Pt) these islands are essentially three-dimensional (3D) and irregular in size. In contrast, on the h-BN nanomesh (on Rh) gold grows initially as regular islands (predominantly 2D), probably filling the... (More)
Sub-monolayers of gold have been grown at room temperature on the hexagonal boron nitride (h-BN) nanomesh formed on Rh(111), and studied systematically with core level and angle-resolved valence band photoelectron spectroscopy. The results are compared with those for the Au/Rh(111) and Au/h-BN/Pt(111) interfaces. It has been found that on clean Rh(111) substrate gold starts to grow two-dimensionally

(2D), while in the presence of a h-BN interlayer it forms islands from the very beginning. In the case of flat h-BN monolayer (on Pt) these islands are essentially three-dimensional (3D) and irregular in size. In contrast, on the h-BN nanomesh (on Rh) gold grows initially as regular islands (predominantly 2D), probably filling the pores of the nanomesh. In addition, the evolution of the Au

islands in h-BN/Rh(111) upon annealing has been investigated with core level photoemission and X-ray absorption. The annealing at temperatures between RT and 300 C does not affect the 2D character of Au islands, while further increase in temperature results in formation of 3D islands. At higher temperatures (above 500 C), the gold atoms diffuse through h-BN into the Rh substrate and/or desorb from the surface. However, they do not influence the chemical bond between rhodium and h-BN at any stage of annealing: the nanomesh remains intact. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Au nanoparticles Nanomesh h-BN ARPES CLPES NEXAFS
in
Surface Science
volume
602
issue
6
pages
1250 - 1255
publisher
Elsevier
external identifiers
  • wos:000255098700017
  • scopus:40649123490
ISSN
0039-6028
DOI
10.1016/j.susc.2008.01.028
language
English
LU publication?
yes
id
b584e1c6-e751-4e68-9ebf-62d0cbca7b01 (old id 976194)
date added to LUP
2009-07-09 09:39:48
date last changed
2017-10-01 04:01:18
@article{b584e1c6-e751-4e68-9ebf-62d0cbca7b01,
  abstract     = {Sub-monolayers of gold have been grown at room temperature on the hexagonal boron nitride (h-BN) nanomesh formed on Rh(111), and studied systematically with core level and angle-resolved valence band photoelectron spectroscopy. The results are compared with those for the Au/Rh(111) and Au/h-BN/Pt(111) interfaces. It has been found that on clean Rh(111) substrate gold starts to grow two-dimensionally<br/><br>
(2D), while in the presence of a h-BN interlayer it forms islands from the very beginning. In the case of flat h-BN monolayer (on Pt) these islands are essentially three-dimensional (3D) and irregular in size. In contrast, on the h-BN nanomesh (on Rh) gold grows initially as regular islands (predominantly 2D), probably filling the pores of the nanomesh. In addition, the evolution of the Au<br/><br>
islands in h-BN/Rh(111) upon annealing has been investigated with core level photoemission and X-ray absorption. The annealing at temperatures between RT and 300 C does not affect the 2D character of Au islands, while further increase in temperature results in formation of 3D islands. At higher temperatures (above 500 C), the gold atoms diffuse through h-BN into the Rh substrate and/or desorb from the surface. However, they do not influence the chemical bond between rhodium and h-BN at any stage of annealing: the nanomesh remains intact.},
  author       = {Ng, May Ling and Preobrajenski, Alexei and Vinogradov, A. S. and Mårtensson, Nils},
  issn         = {0039-6028},
  keyword      = {Au nanoparticles
Nanomesh
h-BN
ARPES
CLPES
NEXAFS},
  language     = {eng},
  number       = {6},
  pages        = {1250--1255},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {Formation and temperature evolution of Au nanoparticles supported on the h-BN nanomesh},
  url          = {http://dx.doi.org/10.1016/j.susc.2008.01.028},
  volume       = {602},
  year         = {2008},
}