Uniaxial Plasmon Coupling through Longitudinal Self-Assembly of Gold Nanorods

Thomas, K. George; Barazzouk, Saïd; Ipe, Binil Itty; Joseph, Seena; Kamat, Prashant V.

doi:10.1021/jp049167v

Cited by 435 publications

(500 citation statements)

References 16 publications

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“…This trend is consistent with that observed in ensemble measurements during the consecutive linear alignment of rods using linkers which have been shown to selectively bond to the ends of gold rods. [36][37][38] The fractional red shift, ∆λ/λ o of the rods shown in Figure 2a is 0.24.…”

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confidence: 99%

Plasmon Coupling of Gold Nanorods at Short Distances and in Different Geometries

et al. 2009

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The experimentally determined scattering spectra of discrete, crystalline, gold nanorod dimers arranged side-to-side, end-to-end, at right angles in different orientations and also with longitudinal offsets are reported along with the electron micrographs of the individual dimers. The spectra exhibit both red-and blue-shifted surface plasmon resonances, consistent with the plasmon hybridization model. However, the plasmon coupling constant for gold dimers with less than a few nanometers separation between the particles does not obey the exponential dependence predicted by the Universal Plasmon Ruler equation. The experimentally determined spectra are compared with electrodynamic calculations and the interactions between the individual rod plasmons in different dimer orientations are elucidated.

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confidence: 99%

Plasmon Coupling of Gold Nanorods at Short Distances and in Different Geometries

et al. 2009

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“…Current technologies and methods used to create nanoarchitectures include top down approaches such as e-beam lithography enabling structures down to 2-nm resolution 8 , pattern transfer processes such as etching 9 and bottom up approaches using dippen nanolithography (down to 30 nm resolution) 10 , hard-tip softspring lithography (with sub-50 nm resolution) 11 , self-assembly of nano-objects 12 and molecular e-beam epitaxy 9 . So far, it has been shown that one-dimensional (1D) gold NP (AuNP) structures can be achieved by template-free assemblies such as chemical bonding 13,14 , hydrogen bonding 15 , electrostatic forces and van der Waals forces. Such assemblies have been induced by small organic molecules, for example, mercaptoethanol 16 and destabilizing agents as salt 17 or ethanol 18 .…”

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Molecular protein adaptor with genetically encoded interaction sites guiding the hierarchical assembly of plasmonically active nanoparticle architectures

et al. 2015

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The control over the defined assembly of nano-objects with nm-precision is important to create systems and materials with enhanced properties, for example, metamaterials. In nature, the precise assembly of inorganic nano-objects with unique features, for example, magnetosomes, is accomplished by efficient and reliable recognition schemes involving protein effectors. Here we present a molecular approach using protein-based 'adaptors/ connectors' with genetically encoded interaction sites to guide the assembly and functionality of different plasmonically active gold nanoparticle architectures (AuNP). The interaction of the defined geometricaly shaped protein adaptors with the AuNP induces the self-assembly of nanoarchitectures ranging from AuNP encapsulation to one-dimensional chain-like structures, complex networks and stars. Synthetic biology and bionanotechnology are applied to co-translationally encode unnatural amino acids as additional site-specific modification sites to generate functionalized biohybrid nanoarchitectures. This protein adaptor-based nanoobject assembly approach might be expanded to other inorganic nano-objects creating biohybrid materials with unique electronic, photonic, plasmonic and magnetic properties.

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“…10 Selective chemical modification of the ends of the NRs, albeit synthetically nontrivial, is perhaps among the most successful approaches toward the creation of long chains of end-to-end NR assembly. 21,29 Prefabricated templates 35,36 or structural frameworks formed from the self-assembly of a block copolymer (BCP) 37 have been used to confine spherical nanoparticles or NRs to form one-dimensional (1D) or two-dimensional (2D) arrays. BCPbased supramolecules are effective in this as well.…”

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End-to-End Alignment of Nanorods in Thin Films

Thorkelsson¹,

Nelson²,

Alivisatos

et al. 2013

Nano Lett.

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A simple approach to obtain end-to-end assemblies of nanorods over macroscopic distances in thin films is described. Nanorods with aspect ratio of 8−12 can be aligned parallel to the surface in an end-to-end fashion by imposing geometric confinement via block copolymer-based supramolecular assemblies. Successful control over the orientation and location of nanorods requires a balance of particle−particle interactions and entropy associated with geometric confinement from the supramolecular framework, as well as consideration of the kinetics of assembly.

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Uniaxial Plasmon Coupling through Longitudinal Self-Assembly of Gold Nanorods

Cited by 435 publications

References 16 publications

Plasmon Coupling of Gold Nanorods at Short Distances and in Different Geometries

Plasmon Coupling of Gold Nanorods at Short Distances and in Different Geometries

Molecular protein adaptor with genetically encoded interaction sites guiding the hierarchical assembly of plasmonically active nanoparticle architectures

End-to-End Alignment of Nanorods in Thin Films

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