Surface Plasmon Resonances in Strongly Coupled Gold Nanosphere Chains from Monomer to Hexamer

Barrow, Steven J.; Funston, Alison M.; Gómez, Daniel E.; Davis, Timothy J.; Mulvaney, Paul

doi:10.1021/nl202080a

Cited by 202 publications

(283 citation statements)

References 42 publications

Supporting

Mentioning

259

Contrasting

Unclassified

Order By: Relevance

“…Figure 3(a) show the spectral position of the lowest energy extinction peak for different disorders and chain lengths. In general, a larger N redshifts the resonance 54,56,57 while increasing the disorder acts to blueshift it. This blueshift, which is small or moderate (≲7% of the δ = 0 value), is less marked in the shorter chains.…”

Section: ■ Resultsmentioning

confidence: 96%

How Chain Plasmons Govern the Optical Response in Strongly Interacting Self-Assembled Metallic Clusters of Nanoparticles

et al. 2012

View full text Add to dashboard Cite

Self-assembled clusters of metallic nanoparticles separated by nanometric gaps generate strong plasmonic modes that support both intense and localized near fields. These find use in many ultrasensitive chemical and biological sensing applications through surface enhanced Raman scattering (SERS). The inability to control at the nanoscale the structure of the clusters on which the optical response crucially depends, has led to the development of general descriptions to model the various morphologies fabricated. Here, we use rigorous electrodynamic calculations to study clusters formed by a hundred nanospheres that are separated by ∼1 nm distance, set by the dimensions of the macrocyclic molecular linker employed experimentally. Three-dimensional (3D) cluster structures of moderate compactness are of special interest since they resemble self-assembled clusters grown under typical diffusion-limited aggregation conditions. We find very good agreement between the simulated and measured far-field extinction spectra, supporting the equivalence of the assumed and experimental morphologies. From these results we argue that the main features of the optical response of two-and three-dimensional clusters can be understood in terms of the excitation of simple units composed of different length resonant chains. Notably, we observe a qualitative difference between short-and long-chain modes in both spectral response and spatial distribution: dimer and shortchain modes are observed in the periphery of the cluster at higher energies, whereas inside the structure longer chain excitation occurs at lower energies. We study in detail different configurations of isolated one-dimensional chains as prototypical building blocks for large clusters, showing that the optical response of the chains is robust to disorder. This study provides an intuitive understanding of the behavior of very complex aggregates and may be generalized to other types of aggregates and systems formed by large numbers of strongly interacting particles.

show abstract

Section: ■ Resultsmentioning

confidence: 96%

How Chain Plasmons Govern the Optical Response in Strongly Interacting Self-Assembled Metallic Clusters of Nanoparticles

et al. 2012

View full text Add to dashboard Cite

show abstract

“…1,2 On the basis of their distinctive properties, metal NPs have been applied for biological sensing, diagnosis and other applications. 3,4 Moreover, as new properties not observed in the distributed state are expected to emerge in the organized states, 5 the precise arrangement of metal NPs in 1 dimensional (D) to 3D is one of the important technical objectives of bottom-up nanotechnology. 6,7 On the other hand, DNA is the ideal building block for the construction of self-organized nanostructures.…”

Section: Introductionmentioning

confidence: 99%

DNA nanostructures as scaffolds for metal nanoparticles

Kuzuya

Ohya

2012

Polym J

View full text Add to dashboard Cite

The rapid development of DNA nanotechnology has enabled the precise bottom-up integration of metal nanoparticles (NPs) on a nanometer scale. The recent introduction of the DNA origami technique has facilitated even more complicated control of the positioning of not only 2 dimensional (D) but also 3D structures. INTRODUCTIONAlthough top-down fabrications, such as photolithography and etching, have long driven advances in nanotechnology, they are now approaching their physical limits. Bottom-up fabrication techniques are expected to break through these limitations. However, these approaches cannot yet replace top-down techniques. Colloidal nanocrystals, including metals and semiconductors, exhibit distinctive properties not observed in the bulk state. Therefore, they are of particular interest for nanotechnology and nanoscience. For example, gold nanoparticles (AuNPs) exhibit unique optical and electrical properties, such as surface plasmon resonance. 1,2 On the basis of their distinctive properties, metal NPs have been applied for biological sensing, diagnosis and other applications. 3,4 Moreover, as new properties not observed in the distributed state are expected to emerge in the organized states, 5 the precise arrangement of metal NPs in 1 dimensional (D) to 3D is one of the important technical objectives of bottom-up nanotechnology. 6,7 On the other hand, DNA is the ideal building block for the construction of self-organized nanostructures. A strand of DNA can specifically bind with its complementary counter strand by WatsonCrick base pairing to form a B-type double helix, which is most common for a pair of complementary DNA in nature and almost independent of their sequences. This fact is highly convenient for fabricating universal nanostructures, as each double helix consisting of various sequences of DNA has the same diameter and pitch. On the basis of this fact and other advantages, such as sequence programmability, reversible double helix formation and strand exchange, availability by automatic synthesis, the relative rigidity of the double helix, enzymatic scission and ligation ability, and easy amplification by a PCR, many DNA-based approaches to construct highly ordered or well-designed nanostructures have been reported. [8][9][10]

show abstract

“…DNA-based assembly 14 has already generated considerable insight into one-dimensional 15 and 2D structures [16][17][18][19] , including the trimer, 18 tetramer 17 and pentamer 16 . 3D mesoscale tetrahedral and octahedral 20 systems have also been assembled using DNA as well as 2D 21,22 and 3D 23,24 lattices.…”

mentioning

confidence: 99%

The surface plasmon modes of self-assembled gold nanocrystals

et al. 2012

Self Cite

View full text Add to dashboard Cite

The three-dimensional (3D) self-assembly of nanocrystals constitutes one of the most important challenges in materials science. A key milestone is the synthesis of simple, regular structures, such as platonic solids, composed of nanocrystal building blocks. Such objects are predicted to have unique optical and electronic properties such as polarization-independent light-scattering and intense local fields. Here we present a two-stage process for fabricating well-defined and highly symmetric, 3D gold nanocrystal structures, including tetrahedra, 3D pentamers and 3D hexamers. Polarized scattering spectra are used to elucidate the plasmon modes present in each structure, and these are compared with computational models. We conclude that self-assembly of highly symmetric, polarization-independent structures with interparticle spacings of order 0.5 nm can now be fabricated. Drastically, enhanced local fields, 1000 times higher than the incident field strength, are produced within the interstices. Fano resonances are generated if the symmetry is broken.

show abstract

Surface Plasmon Resonances in Strongly Coupled Gold Nanosphere Chains from Monomer to Hexamer

Cited by 202 publications

References 42 publications

How Chain Plasmons Govern the Optical Response in Strongly Interacting Self-Assembled Metallic Clusters of Nanoparticles

How Chain Plasmons Govern the Optical Response in Strongly Interacting Self-Assembled Metallic Clusters of Nanoparticles

DNA nanostructures as scaffolds for metal nanoparticles

The surface plasmon modes of self-assembled gold nanocrystals

Contact Info

Product

Resources

About