Localized surface plasmon resonance spectroscopy of triangular aluminum nanoparticles

George H. Chan, Jing Zhao, George C Schatz, Richard P Van Duyne

Research output: Contribution to journalArticle

271 Citations (Scopus)

Abstract

The localized surface plasmon resonance (LSPR) of Al nanoparticles fabricated by nanosphere lithography (NSL) was examined by UV-vis extinction spectroscopy and electrodynamics theory. Al triangular nanoparticle arrays can support LSP resonances that are tunable throughout the visible and into the UV portion of the spectrum. Scanning electron microscope and atomic force microscope studies point to the presence of a thin native Al2O 3 layer on the surface of the Al triangular nanoparticles. The presence of the oxide layer, especially on the tips of the nanotriangles, results in a significant red shift in the LSPR λmax. The refractive index (RI) sensitivity of the Al triangular nanoparticle arrays in bulk solvents was determined to be 0.405 eV/RIU. Theoretical results show that the oxide layer leads to a significant decrease in this RI sensitivity compared to unoxidized triangular nanoparticles of similar size and geometry. A comparison of Al, Ag, Cu, and Au triangular nanoparticles for a similar shape and geometry show that the LSPR λmax has the ordering Au > Cu > Ag > Al, while the full width at half-maximum satisfies Al > Au > Ag > Cu.

Original languageEnglish
Pages (from-to)13958-13963
Number of pages6
JournalJournal of Physical Chemistry C
Volume112
Issue number36
DOIs
Publication statusPublished - Sep 11 2008

Fingerprint

Surface plasmon resonance
Aluminum
surface plasmon resonance
Spectroscopy
Nanoparticles
aluminum
nanoparticles
spectroscopy
Oxides
Refractive index
refractivity
oxides
Geometry
Nanospheres
sensitivity
Electrodynamics
geometry
Full width at half maximum
electrodynamics
red shift

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Localized surface plasmon resonance spectroscopy of triangular aluminum nanoparticles. / Chan, George H.; Zhao, Jing; Schatz, George C; Duyne, Richard P Van.

In: Journal of Physical Chemistry C, Vol. 112, No. 36, 11.09.2008, p. 13958-13963.

Research output: Contribution to journalArticle

Chan, George H. ; Zhao, Jing ; Schatz, George C ; Duyne, Richard P Van. / Localized surface plasmon resonance spectroscopy of triangular aluminum nanoparticles. In: Journal of Physical Chemistry C. 2008 ; Vol. 112, No. 36. pp. 13958-13963.
@article{8186595e1e6041e598c4ce43a35b6635,
title = "Localized surface plasmon resonance spectroscopy of triangular aluminum nanoparticles",
abstract = "The localized surface plasmon resonance (LSPR) of Al nanoparticles fabricated by nanosphere lithography (NSL) was examined by UV-vis extinction spectroscopy and electrodynamics theory. Al triangular nanoparticle arrays can support LSP resonances that are tunable throughout the visible and into the UV portion of the spectrum. Scanning electron microscope and atomic force microscope studies point to the presence of a thin native Al2O 3 layer on the surface of the Al triangular nanoparticles. The presence of the oxide layer, especially on the tips of the nanotriangles, results in a significant red shift in the LSPR λmax. The refractive index (RI) sensitivity of the Al triangular nanoparticle arrays in bulk solvents was determined to be 0.405 eV/RIU. Theoretical results show that the oxide layer leads to a significant decrease in this RI sensitivity compared to unoxidized triangular nanoparticles of similar size and geometry. A comparison of Al, Ag, Cu, and Au triangular nanoparticles for a similar shape and geometry show that the LSPR λmax has the ordering Au > Cu > Ag > Al, while the full width at half-maximum satisfies Al > Au > Ag > Cu.",
author = "Chan, {George H.} and Jing Zhao and Schatz, {George C} and Duyne, {Richard P Van}",
year = "2008",
month = "9",
day = "11",
doi = "10.1021/jp804088z",
language = "English",
volume = "112",
pages = "13958--13963",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "36",

}

TY - JOUR

T1 - Localized surface plasmon resonance spectroscopy of triangular aluminum nanoparticles

AU - Chan, George H.

AU - Zhao, Jing

AU - Schatz, George C

AU - Duyne, Richard P Van

PY - 2008/9/11

Y1 - 2008/9/11

N2 - The localized surface plasmon resonance (LSPR) of Al nanoparticles fabricated by nanosphere lithography (NSL) was examined by UV-vis extinction spectroscopy and electrodynamics theory. Al triangular nanoparticle arrays can support LSP resonances that are tunable throughout the visible and into the UV portion of the spectrum. Scanning electron microscope and atomic force microscope studies point to the presence of a thin native Al2O 3 layer on the surface of the Al triangular nanoparticles. The presence of the oxide layer, especially on the tips of the nanotriangles, results in a significant red shift in the LSPR λmax. The refractive index (RI) sensitivity of the Al triangular nanoparticle arrays in bulk solvents was determined to be 0.405 eV/RIU. Theoretical results show that the oxide layer leads to a significant decrease in this RI sensitivity compared to unoxidized triangular nanoparticles of similar size and geometry. A comparison of Al, Ag, Cu, and Au triangular nanoparticles for a similar shape and geometry show that the LSPR λmax has the ordering Au > Cu > Ag > Al, while the full width at half-maximum satisfies Al > Au > Ag > Cu.

AB - The localized surface plasmon resonance (LSPR) of Al nanoparticles fabricated by nanosphere lithography (NSL) was examined by UV-vis extinction spectroscopy and electrodynamics theory. Al triangular nanoparticle arrays can support LSP resonances that are tunable throughout the visible and into the UV portion of the spectrum. Scanning electron microscope and atomic force microscope studies point to the presence of a thin native Al2O 3 layer on the surface of the Al triangular nanoparticles. The presence of the oxide layer, especially on the tips of the nanotriangles, results in a significant red shift in the LSPR λmax. The refractive index (RI) sensitivity of the Al triangular nanoparticle arrays in bulk solvents was determined to be 0.405 eV/RIU. Theoretical results show that the oxide layer leads to a significant decrease in this RI sensitivity compared to unoxidized triangular nanoparticles of similar size and geometry. A comparison of Al, Ag, Cu, and Au triangular nanoparticles for a similar shape and geometry show that the LSPR λmax has the ordering Au > Cu > Ag > Al, while the full width at half-maximum satisfies Al > Au > Ag > Cu.

UR - http://www.scopus.com/inward/record.url?scp=52649108669&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=52649108669&partnerID=8YFLogxK

U2 - 10.1021/jp804088z

DO - 10.1021/jp804088z

M3 - Article

VL - 112

SP - 13958

EP - 13963

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 36

ER -