Optical properties of two interacting gold nanoparticles

Rechberger, Werner; Hohenau, Andreas; Leitner, A.; Krenn, Joachim R.; Lamprecht, Bernhard; Aussenegg, F. R.

doi:10.1016/s0030-4018(03)01357-9

Cited by 1,378 publications

(1,274 citation statements)

References 12 publications

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“…This latter point has been elegantly demonstrated by Rechberger et al for lithographically prepared arrays of identical average volume fraction, and we will return to it later. 30 The data of Ung et al, 13 derived for very precisely determined values of , are shown together with Equation (1) in Fig. 11.…”

Section: Discussionmentioning

confidence: 96%

In Situ Precipitation of Gold Nanoparticles onto Glass for Potential Architectural Applications

2004

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The optical properties of in situ deposited gold nano-particle coatings are investigated for potential application in architectural glass. It is found that the optical properties of the coating can be controlled by the pH of the deposition solution. At a pH of 5.1 the color of the coatings develops from pink, through violet, to blue in transmission. This is due to a plasmon resonance peak at 520 nm from isolated particles, and one at about 700 nm due to near-field dipole interactions, with an intermediate zone of coexistence of the two, which produces the violet color. However, the two peaks do not coexist in the spectra of coatings produced at pH 8.0 or at pH 10.0, with the peak due to the 520 nm resonance being swamped by the development of the resonance due to particleparticle interactions. In all cases the 700 nm peak could be broadened and red-shifted by increasing the deposition time. The reasons for these differences are explored, and are shown to be attributable to the smaller, more aggregated morphology of nano-particles precipitated at the higher pHs. The In situ precipitation of gold nanoparticles onto glass for potential architectural applications Coatings of similar average density and similar nominal particle size, but different patterns of aggregation, can produce quite different optical transmission spectra, (a) shows substantially isolated particles of 60 nm diameter, and the corresponding spectrum shows a peak at 520 nm, whereas (b) is aggregated from much smaller particles and has a broad absorption peak at approximately 655 nm.4

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Section: Discussionmentioning

confidence: 96%

In Situ Precipitation of Gold Nanoparticles onto Glass for Potential Architectural Applications

2004

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“…21,118,119 We show the extinction spectra and near-eld enhancement at the gap of the Au dimer for several representative separation distances in Fig. 6(a) and 7(a), respectively.…”

Section: Faraday Discussion Papermentioning

confidence: 99%

A classical treatment of optical tunneling in plasmonic gaps: extending the quantum corrected model to practical situations

et al. 2015

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(2015). A classical treatment of optical tunneling in plasmonic gaps: extending the quantum corrected model to practical situations. Faraday Discussions, 178, The optical response of plasmonic nanogaps is challenging to address when the separation between the two nanoparticles forming the gap is reduced to a few nanometers or even subnanometer distances. We have compared results of the plasmon response within different levels of approximation, and identified a classical local regime, a nonlocal regime and a quantum regime of interaction. For separations of a fewÅngstroms, in the quantum regime, optical tunneling can occur, strongly modifying the optics of the nanogap. We have considered a classical effective model, so called Quantum Corrected Model (QCM), that has been introduced to correctly describe the main features of optical transport in plasmonic nanogaps. The basics of this model are explained in detail, and its implementation is extended to include nonlocal effects and address practical situations involving different materials and temperatures of operation.

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“…The field extension range can also be indirectly inferred from a study of interacting nanoparticle pairs, for 50 nm diameter discs the interaction is insignificant at a diameter of ca. 1.2 particles 23 . The particle surface density for the gold nanoparticles in the array was determined to be 1 np per 220 ± 60 nm 2 , therefore the majority of particles are unlikely to show inter-particle interactions 24 , there will however be some particles that are in closer proximity that may then interact.…”

Section: Sensiq Propagating Plasmon Surfacementioning

confidence: 99%

Measurement of the localised plasmon penetration depth for gold nanoparticles using a non-invasive bio-stacking method

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Olkhov

Shaw

2013

Phys. Chem. Chem. Phys.

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An alternating bio-stack of antibodies is polymerized on a gold surface to characterize the extent of the plasmon field. The decay in the kinetic binding parameters is attributed to the change in the penetration depth and calibrated using the continuous gold surface to derive a stack thickness of 17.5 ± 0.8 nm. The penetration depth of spherical-shaped nanoparticles with diameter 90 ± 13 nm diameter was determined to be 93 ± 10 nm.

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Optical properties of two interacting gold nanoparticles

Cited by 1,378 publications

References 12 publications

In Situ Precipitation of Gold Nanoparticles onto Glass for Potential Architectural Applications

In Situ Precipitation of Gold Nanoparticles onto Glass for Potential Architectural Applications

A classical treatment of optical tunneling in plasmonic gaps: extending the quantum corrected model to practical situations

Measurement of the localised plasmon penetration depth for gold nanoparticles using a non-invasive bio-stacking method

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