Abstract
This article reviews recent advances in the theory of nanoparticle optical spectra using classical electrodynamics. Although Mie theory has dominated work in this field for nearly a century, this theory is limited to spherical particles and spherical shells, and thus it cannot describe many experiments of recent interest to the chemical and biological sensor community in which nonspherical particles, including particles with only C1 symmetry, and particles in asymmetric environments (i.e. on surfaces and in nonspherical aggregates) are studied. There are now several approaches available for describing nonspherical particles, but the majority of recent applications to isolated particles have been done using the finite element discrete dipole approximation (DDA) theory. The review describes several applications of DDA to the determination of extinction spectra, including extensions to describe solvent and substrate effects. We also describe theories of nanoparticle aggregates based on approaches that explicitly describe electromagnetic coupling between the particles, and effective medium approaches for nonspherical aggregates.
| Original language | English |
|---|---|
| Pages (from-to) | 73-80 |
| Number of pages | 8 |
| Journal | Journal of Molecular Structure: THEOCHEM |
| Volume | 573 |
| DOIs | |
| Publication status | Published - Oct 26 2001 |
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Keywords
- Biosensor
- Discrete dipole approximation
- Effective medium approximation
- Electrodynamics
- Extinction spectrum
- Nanoparticle
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Computational Theory and Mathematics
- Atomic and Molecular Physics, and Optics
Cite this
Electrodynamics of nonspherical noble metal nanoparticles and nanoparticle aggregates. / Schatz, George C.
In: Journal of Molecular Structure: THEOCHEM, Vol. 573, 26.10.2001, p. 73-80.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrodynamics of nonspherical noble metal nanoparticles and nanoparticle aggregates
AU - Schatz, George C
PY - 2001/10/26
Y1 - 2001/10/26
N2 - This article reviews recent advances in the theory of nanoparticle optical spectra using classical electrodynamics. Although Mie theory has dominated work in this field for nearly a century, this theory is limited to spherical particles and spherical shells, and thus it cannot describe many experiments of recent interest to the chemical and biological sensor community in which nonspherical particles, including particles with only C1 symmetry, and particles in asymmetric environments (i.e. on surfaces and in nonspherical aggregates) are studied. There are now several approaches available for describing nonspherical particles, but the majority of recent applications to isolated particles have been done using the finite element discrete dipole approximation (DDA) theory. The review describes several applications of DDA to the determination of extinction spectra, including extensions to describe solvent and substrate effects. We also describe theories of nanoparticle aggregates based on approaches that explicitly describe electromagnetic coupling between the particles, and effective medium approaches for nonspherical aggregates.
AB - This article reviews recent advances in the theory of nanoparticle optical spectra using classical electrodynamics. Although Mie theory has dominated work in this field for nearly a century, this theory is limited to spherical particles and spherical shells, and thus it cannot describe many experiments of recent interest to the chemical and biological sensor community in which nonspherical particles, including particles with only C1 symmetry, and particles in asymmetric environments (i.e. on surfaces and in nonspherical aggregates) are studied. There are now several approaches available for describing nonspherical particles, but the majority of recent applications to isolated particles have been done using the finite element discrete dipole approximation (DDA) theory. The review describes several applications of DDA to the determination of extinction spectra, including extensions to describe solvent and substrate effects. We also describe theories of nanoparticle aggregates based on approaches that explicitly describe electromagnetic coupling between the particles, and effective medium approaches for nonspherical aggregates.
KW - Biosensor
KW - Discrete dipole approximation
KW - Effective medium approximation
KW - Electrodynamics
KW - Extinction spectrum
KW - Nanoparticle
UR - http://www.scopus.com/inward/record.url?scp=0035955526&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035955526&partnerID=8YFLogxK
U2 - 10.1016/S0166-1280(01)00545-0
DO - 10.1016/S0166-1280(01)00545-0
M3 - Article
AN - SCOPUS:0035955526
VL - 573
SP - 73
EP - 80
JO - Computational and Theoretical Chemistry
JF - Computational and Theoretical Chemistry
SN - 2210-271X
ER -