DNA-Linked Metal Nanosphere Materials

Structural Basis for the Optical Properties

Anne A. Lazarides, George C Schatz

Research output: Contribution to journalArticle

306 Citations (Scopus)

Abstract

The structural basis for the aggregation-induced optical properties of colloidal gold nanosphere aggregates is examined by means of electrodynamics calculations. Recently developed methods for calculating the electrodynamic response of aggregates composed of large numbers of small metal nanospheres in a dielectric medium are used to determine the optical changes associated with the formation of spherical aggregates. The calculations use accurate nanoparticle polarizabilities determined from Mie theory, an iterative conjugate-gradient solution algorithm, and fast-Fourier transform methods for efficient solution of the electrodynamic interacting nanoparticle equations. The UV extinction lowering and the shifting and broadening of the visible plasmon peak observed experimentally in solutions of DNA-linked gold nanospheres are explained as the collective electromagnetic response of thousands of nanoparticles.

Original languageEnglish
Pages (from-to)460-467
Number of pages8
JournalJournal of Physical Chemistry B
Volume104
Issue number3
Publication statusPublished - Jan 27 2000

Fingerprint

Nanospheres
Electrodynamics
electrodynamics
DNA
deoxyribonucleic acid
Optical properties
Metals
Nanoparticles
optical properties
nanoparticles
Gold
metals
gold
Gold Colloid
Mie scattering
Fast Fourier transforms
extinction
Agglomeration
electromagnetism
gradients

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

DNA-Linked Metal Nanosphere Materials : Structural Basis for the Optical Properties. / Lazarides, Anne A.; Schatz, George C.

In: Journal of Physical Chemistry B, Vol. 104, No. 3, 27.01.2000, p. 460-467.

Research output: Contribution to journalArticle

@article{3a04ea9c50334408bbbdb16cfd150a9c,
title = "DNA-Linked Metal Nanosphere Materials: Structural Basis for the Optical Properties",
abstract = "The structural basis for the aggregation-induced optical properties of colloidal gold nanosphere aggregates is examined by means of electrodynamics calculations. Recently developed methods for calculating the electrodynamic response of aggregates composed of large numbers of small metal nanospheres in a dielectric medium are used to determine the optical changes associated with the formation of spherical aggregates. The calculations use accurate nanoparticle polarizabilities determined from Mie theory, an iterative conjugate-gradient solution algorithm, and fast-Fourier transform methods for efficient solution of the electrodynamic interacting nanoparticle equations. The UV extinction lowering and the shifting and broadening of the visible plasmon peak observed experimentally in solutions of DNA-linked gold nanospheres are explained as the collective electromagnetic response of thousands of nanoparticles.",
author = "Lazarides, {Anne A.} and Schatz, {George C}",
year = "2000",
month = "1",
day = "27",
language = "English",
volume = "104",
pages = "460--467",
journal = "Journal of Physical Chemistry B Materials",
issn = "1520-6106",
publisher = "American Chemical Society",
number = "3",

}

TY - JOUR

T1 - DNA-Linked Metal Nanosphere Materials

T2 - Structural Basis for the Optical Properties

AU - Lazarides, Anne A.

AU - Schatz, George C

PY - 2000/1/27

Y1 - 2000/1/27

N2 - The structural basis for the aggregation-induced optical properties of colloidal gold nanosphere aggregates is examined by means of electrodynamics calculations. Recently developed methods for calculating the electrodynamic response of aggregates composed of large numbers of small metal nanospheres in a dielectric medium are used to determine the optical changes associated with the formation of spherical aggregates. The calculations use accurate nanoparticle polarizabilities determined from Mie theory, an iterative conjugate-gradient solution algorithm, and fast-Fourier transform methods for efficient solution of the electrodynamic interacting nanoparticle equations. The UV extinction lowering and the shifting and broadening of the visible plasmon peak observed experimentally in solutions of DNA-linked gold nanospheres are explained as the collective electromagnetic response of thousands of nanoparticles.

AB - The structural basis for the aggregation-induced optical properties of colloidal gold nanosphere aggregates is examined by means of electrodynamics calculations. Recently developed methods for calculating the electrodynamic response of aggregates composed of large numbers of small metal nanospheres in a dielectric medium are used to determine the optical changes associated with the formation of spherical aggregates. The calculations use accurate nanoparticle polarizabilities determined from Mie theory, an iterative conjugate-gradient solution algorithm, and fast-Fourier transform methods for efficient solution of the electrodynamic interacting nanoparticle equations. The UV extinction lowering and the shifting and broadening of the visible plasmon peak observed experimentally in solutions of DNA-linked gold nanospheres are explained as the collective electromagnetic response of thousands of nanoparticles.

UR - http://www.scopus.com/inward/record.url?scp=0000955969&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000955969&partnerID=8YFLogxK

M3 - Article

VL - 104

SP - 460

EP - 467

JO - Journal of Physical Chemistry B Materials

JF - Journal of Physical Chemistry B Materials

SN - 1520-6106

IS - 3

ER -