Influence of preparation conditions on the depth-dependent composition of AuPd nanoparticles grown on planar oxide surfaces

Andrew R. Haire; Johan Gustafson; Aoife G. Trant; Timothy Edward Jones; Timothy C. Q. Noakes; Paul Bailey; Christopher J. Baddeley

doi:10.1016/j.susc.2010.10.021

Influence of preparation conditions on the depth-dependent composition of AuPd nanoparticles grown on planar oxide surfaces

Andrew R. Haire, Johan Gustafson, Aoife G. Trant, Timothy Edward Jones, Timothy C. Q. Noakes, Paul Bailey, Christopher J. Baddeley

Research output: Contribution to journal › Article › peer-review

Abstract

The high resolution depth profiling capabilities of medium energy ion scattering are employed to determine the depth dependent composition of Au/Pd nanoparticles grown on thin silica films on Si(100) as functions of Au/Pd composition, total metal loading and annealing temperature. We show that, despite the fact that Au is deposited prior to Pd, the surface of the particles is generally enriched in Au compared to the bulk composition. The extent of this Au enrichment decreases with annealing temperature. In addition, we examine the influence of the adsorption of acetic acid on the surface composition of Au/Pd particles grown on thin alumina films on NiAl(110). We find that acetic acid causes limited segregation of Pd to the bimetallic surface of relatively Au-rich particles. (C) 2010 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	214-219
Number of pages	6
Journal	Surface Science
Volume	605
Issue number	1-2
DOIs	https://doi.org/10.1016/j.susc.2010.10.021
Publication status	Published - Jan 2011

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10.1016/j.susc.2010.10.021

MEIS Investigations EP/E047580/1: MEIS investigations of adsorbate induced segregation at the bimetallic surface of single crystal alloys and supported nanoparticles
Baddeley, C. J. (PI)
EPSRC
1/05/07 → 31/07/10
Project: Standard

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title = "Influence of preparation conditions on the depth-dependent composition of AuPd nanoparticles grown on planar oxide surfaces",

abstract = "The high resolution depth profiling capabilities of medium energy ion scattering are employed to determine the depth dependent composition of Au/Pd nanoparticles grown on thin silica films on Si(100) as functions of Au/Pd composition, total metal loading and annealing temperature. We show that, despite the fact that Au is deposited prior to Pd, the surface of the particles is generally enriched in Au compared to the bulk composition. The extent of this Au enrichment decreases with annealing temperature. In addition, we examine the influence of the adsorption of acetic acid on the surface composition of Au/Pd particles grown on thin alumina films on NiAl(110). We find that acetic acid causes limited segregation of Pd to the bimetallic surface of relatively Au-rich particles. (C) 2010 Elsevier B.V. All rights reserved.",

author = "Haire, {Andrew R.} and Johan Gustafson and Trant, {Aoife G.} and Jones, {Timothy Edward} and Noakes, {Timothy C. Q.} and Paul Bailey and Baddeley, {Christopher J.}",

year = "2011",

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doi = "10.1016/j.susc.2010.10.021",

language = "English",

volume = "605",

pages = "214--219",

journal = "Surface Science",

issn = "0039-6028",

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T1 - Influence of preparation conditions on the depth-dependent composition of AuPd nanoparticles grown on planar oxide surfaces

AU - Haire, Andrew R.

AU - Gustafson, Johan

AU - Trant, Aoife G.

AU - Jones, Timothy Edward

AU - Noakes, Timothy C. Q.

AU - Bailey, Paul

AU - Baddeley, Christopher J.

PY - 2011/1

Y1 - 2011/1

N2 - The high resolution depth profiling capabilities of medium energy ion scattering are employed to determine the depth dependent composition of Au/Pd nanoparticles grown on thin silica films on Si(100) as functions of Au/Pd composition, total metal loading and annealing temperature. We show that, despite the fact that Au is deposited prior to Pd, the surface of the particles is generally enriched in Au compared to the bulk composition. The extent of this Au enrichment decreases with annealing temperature. In addition, we examine the influence of the adsorption of acetic acid on the surface composition of Au/Pd particles grown on thin alumina films on NiAl(110). We find that acetic acid causes limited segregation of Pd to the bimetallic surface of relatively Au-rich particles. (C) 2010 Elsevier B.V. All rights reserved.

AB - The high resolution depth profiling capabilities of medium energy ion scattering are employed to determine the depth dependent composition of Au/Pd nanoparticles grown on thin silica films on Si(100) as functions of Au/Pd composition, total metal loading and annealing temperature. We show that, despite the fact that Au is deposited prior to Pd, the surface of the particles is generally enriched in Au compared to the bulk composition. The extent of this Au enrichment decreases with annealing temperature. In addition, we examine the influence of the adsorption of acetic acid on the surface composition of Au/Pd particles grown on thin alumina films on NiAl(110). We find that acetic acid causes limited segregation of Pd to the bimetallic surface of relatively Au-rich particles. (C) 2010 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.susc.2010.10.021

DO - 10.1016/j.susc.2010.10.021

M3 - Article

SN - 0039-6028

VL - 605

SP - 214

EP - 219

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

Influence of preparation conditions on the depth-dependent composition of AuPd nanoparticles grown on planar oxide surfaces

Abstract

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MEIS Investigations EP/E047580/1: MEIS investigations of adsorbate induced segregation at the bimetallic surface of single crystal alloys and supported nanoparticles

Cite this