Influence of metal grain size on surface-enhanced Raman scattering

P. Dawson, K. B. Alexander, J. R. Thompson, J. W. Haas, T. L. Ferrell

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The surface roughness of nominally smooth and of randomly roughened thin silver films is characterized using scanning tunneling microscopy and the metal grain size is assessed using transmission electron microscopy. On each type of substrate used, glass or CaF2-roughened glass, the silver films are deposited either very slowly (0.15 nm s-1) or quite quickly (2.0 nm s-1). Only silver films deposited on CaF2-roughened glass yield measurable surface-enhanced Raman signals for benzoic acid; the enhancement is brought about by surface field amplification due to the excitation of delocalized surface-plasmon polaritons. However, the surface-enhanced Raman signals obtained from the slow-deposited silver films are significantly better (by about a factor of 3) than those obtained from the fast-deposited silver films on a given CaF2-roughened substrate. The explanation of this observation does not lie with different surface roughness; both types of film yield closely similar data on the scanning tunneling microscope. Rather, it is suggested that the relatively small grain size of the fast-deposited silver films leads to increased elastic scattering of surface-plasmon polaritons at the grain boundaries, with a consequent increase of internal damping. This results in a reduction of the scattered Raman signal.

Original languageEnglish (US)
Pages (from-to)6372-6381
Number of pages10
JournalPhysical Review B
Volume44
Issue number12
DOIs
StatePublished - 1991
Externally publishedYes

Fingerprint

grain size
Raman spectra
silver
metals
polaritons
glass
surface roughness
benzoic acid
scanning tunneling microscopy
elastic scattering
grain boundaries
damping
microscopes
transmission electron microscopy
scanning
augmentation
excitation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Dawson, P., Alexander, K. B., Thompson, J. R., Haas, J. W., & Ferrell, T. L. (1991). Influence of metal grain size on surface-enhanced Raman scattering. Physical Review B, 44(12), 6372-6381. https://doi.org/10.1103/PhysRevB.44.6372

Influence of metal grain size on surface-enhanced Raman scattering. / Dawson, P.; Alexander, K. B.; Thompson, J. R.; Haas, J. W.; Ferrell, T. L.

In: Physical Review B, Vol. 44, No. 12, 1991, p. 6372-6381.

Research output: Contribution to journalArticle

Dawson, P, Alexander, KB, Thompson, JR, Haas, JW & Ferrell, TL 1991, 'Influence of metal grain size on surface-enhanced Raman scattering', Physical Review B, vol. 44, no. 12, pp. 6372-6381. https://doi.org/10.1103/PhysRevB.44.6372
Dawson P, Alexander KB, Thompson JR, Haas JW, Ferrell TL. Influence of metal grain size on surface-enhanced Raman scattering. Physical Review B. 1991;44(12):6372-6381. https://doi.org/10.1103/PhysRevB.44.6372
Dawson, P. ; Alexander, K. B. ; Thompson, J. R. ; Haas, J. W. ; Ferrell, T. L. / Influence of metal grain size on surface-enhanced Raman scattering. In: Physical Review B. 1991 ; Vol. 44, No. 12. pp. 6372-6381.
@article{fa6dc23e8ab143eeb9abc1219cd8ff34,
title = "Influence of metal grain size on surface-enhanced Raman scattering",
abstract = "The surface roughness of nominally smooth and of randomly roughened thin silver films is characterized using scanning tunneling microscopy and the metal grain size is assessed using transmission electron microscopy. On each type of substrate used, glass or CaF2-roughened glass, the silver films are deposited either very slowly (0.15 nm s-1) or quite quickly (2.0 nm s-1). Only silver films deposited on CaF2-roughened glass yield measurable surface-enhanced Raman signals for benzoic acid; the enhancement is brought about by surface field amplification due to the excitation of delocalized surface-plasmon polaritons. However, the surface-enhanced Raman signals obtained from the slow-deposited silver films are significantly better (by about a factor of 3) than those obtained from the fast-deposited silver films on a given CaF2-roughened substrate. The explanation of this observation does not lie with different surface roughness; both types of film yield closely similar data on the scanning tunneling microscope. Rather, it is suggested that the relatively small grain size of the fast-deposited silver films leads to increased elastic scattering of surface-plasmon polaritons at the grain boundaries, with a consequent increase of internal damping. This results in a reduction of the scattered Raman signal.",
author = "P. Dawson and Alexander, {K. B.} and Thompson, {J. R.} and Haas, {J. W.} and Ferrell, {T. L.}",
year = "1991",
doi = "10.1103/PhysRevB.44.6372",
language = "English (US)",
volume = "44",
pages = "6372--6381",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "12",

}

TY - JOUR

T1 - Influence of metal grain size on surface-enhanced Raman scattering

AU - Dawson, P.

AU - Alexander, K. B.

AU - Thompson, J. R.

AU - Haas, J. W.

AU - Ferrell, T. L.

PY - 1991

Y1 - 1991

N2 - The surface roughness of nominally smooth and of randomly roughened thin silver films is characterized using scanning tunneling microscopy and the metal grain size is assessed using transmission electron microscopy. On each type of substrate used, glass or CaF2-roughened glass, the silver films are deposited either very slowly (0.15 nm s-1) or quite quickly (2.0 nm s-1). Only silver films deposited on CaF2-roughened glass yield measurable surface-enhanced Raman signals for benzoic acid; the enhancement is brought about by surface field amplification due to the excitation of delocalized surface-plasmon polaritons. However, the surface-enhanced Raman signals obtained from the slow-deposited silver films are significantly better (by about a factor of 3) than those obtained from the fast-deposited silver films on a given CaF2-roughened substrate. The explanation of this observation does not lie with different surface roughness; both types of film yield closely similar data on the scanning tunneling microscope. Rather, it is suggested that the relatively small grain size of the fast-deposited silver films leads to increased elastic scattering of surface-plasmon polaritons at the grain boundaries, with a consequent increase of internal damping. This results in a reduction of the scattered Raman signal.

AB - The surface roughness of nominally smooth and of randomly roughened thin silver films is characterized using scanning tunneling microscopy and the metal grain size is assessed using transmission electron microscopy. On each type of substrate used, glass or CaF2-roughened glass, the silver films are deposited either very slowly (0.15 nm s-1) or quite quickly (2.0 nm s-1). Only silver films deposited on CaF2-roughened glass yield measurable surface-enhanced Raman signals for benzoic acid; the enhancement is brought about by surface field amplification due to the excitation of delocalized surface-plasmon polaritons. However, the surface-enhanced Raman signals obtained from the slow-deposited silver films are significantly better (by about a factor of 3) than those obtained from the fast-deposited silver films on a given CaF2-roughened substrate. The explanation of this observation does not lie with different surface roughness; both types of film yield closely similar data on the scanning tunneling microscope. Rather, it is suggested that the relatively small grain size of the fast-deposited silver films leads to increased elastic scattering of surface-plasmon polaritons at the grain boundaries, with a consequent increase of internal damping. This results in a reduction of the scattered Raman signal.

UR - http://www.scopus.com/inward/record.url?scp=0003173606&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0003173606&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.44.6372

DO - 10.1103/PhysRevB.44.6372

M3 - Article

AN - SCOPUS:0003173606

VL - 44

SP - 6372

EP - 6381

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 12

ER -