Optical absorption of submonolayer silver films: Size dependence of ϵbound in small island particles

Yamaguchi, Tomuo; Ogawa, Masafumi; Takahashi, Hidetoshi; Saito, Nobuo; Anno, E.

doi:10.1016/0039-6028(83)90105-x

Cited by 34 publications

(11 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spectra of dilute solutions of spherical nanocrystals can be modeled quite well with the Mie theory. [52][53][54][55][56][57][58][59] Both experimental and simulated absorption spectra show a decrease in the plasmon resonance band intensity and an increase in bandwidth with decreasing particle size. The shape of the experimental peak is nearly Lorentzien and higher-energy discrepancies are due to 4d-5sp interband transitions.…”

Section: Collectives Properties Of Silver Nanocrystalsmentioning

confidence: 99%

Silver Nanocrystals: Self-Organization and Collective Properties

Courty

2010

J. Phys. Chem. C

View full text Add to dashboard Cite

In this paper, the main parameters, which dictate the supracrystalline structure of silver nanocrystals self-assembled at the micrometer scale, are evidenced. They are the alkyl-chain length, the deposition temperature, the concentration of the colloidal solution and the nature of the substrate. By varying the deposition temperature (from 15° to 50 °C), from the same batch of nanocrystals (same size, same coating agent), dense (fcc and hcp) and loose (bcc) supracrystals or disordered arrangements (rcp) are produced. By tuning the nature of the substrate (HOPG or amorphous carbon) and its temperature, the final size of the supracrystals is controlled. Collective properties due to either nanocrystals ordering in 2D superlattices or in supracrystals (3D) are pointed out. These properties are either due to dipolar interactions with the appearance of coupled plasmon modes or to the attraction between nanocrystals, self-assembled via interdigitation of the alkylchains used as coating agents, which leads to coherent vibrations of nanocrystals in a supracrystal.

show abstract

Section: Collectives Properties Of Silver Nanocrystalsmentioning

confidence: 99%

Silver Nanocrystals: Self-Organization and Collective Properties

Courty

2010

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…The misfit observed at the high energy is due to the interband transitions (4d-5sp). 27 Such an optical response has been well described by the quasistatic approximation of the Mie theory, [28][29] where the optical extinction cross section is given mainly by the dipole absorption and shows a narrow plasmon resonance influenced by the contribution of the interband transitions. Table II shows an increase in the bandwidth with decreasing the particle size.…”

Section: A Isolated Spherical Particlesmentioning

confidence: 99%

Collective optical properties of silver nanoparticles organized in two-dimensional superlattices

et al. 1999

View full text Add to dashboard Cite

In this paper we describe collective properties of silver nanoparticles organized in two-dimensional superlattices. Our aim is to show that we can control the state of organization of the silver particles deposited on the substrate. Then the particles are found in the form of either a well-organized two-dimensional array of isolated particles or disordered and coalesced particles distributed more or less randomly on the surface. The optical spectra are compared with both polarized and unpolarized light. When particles are arranged in a hexagonal array, an asymmetrical and broad peak is observed. Under p-polarized light, a new high-energy peak appears that is interpreted as a collective effect, resulting from the mutual interactions between particles. We support this conclusion from numerical calculations performed on finite-size clusters of silver spheres, where only the electrodynamic interactions between the spheres are taken into account. With disordered and coalesced system the high-energy peak disappears whereas a peak toward low energy is observed. This is attributed to coalesced particles. ͓S0163-1829͑99͒12415-9͔

show abstract

“…Comparing the spectrum in Fig. 5͑b͒ with the absorption spectrum of Ag island films, 9 we see that the third absorption is OPRA. In metal island films, the OPRA is due to plasma oscillations of conduction electrons in metal particles.…”

Section: Opra Of Cns Ag Filmsmentioning

confidence: 84%

“…In this work, optical absorption due to conduction electrons is studied for CNS Ag and Ir films. OPRA, reported for Ag island films, 9 and weak DTA are found for the CNS Ag films, and only the weak DTA appears in the CNS Ir films.…”

Section: Introductionmentioning

confidence: 87%

Optical absorption of continuous-network-structure Ag and Ir films: Presence of particlelike and conduction-electron-localized regions

Anno

Tanimoto

1999

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

E. Anno ; M. Tanimoto, Physical Review B, 60(7), 5009-5015, 1999. "Copyright 1999 by the American Physical Society."http://prola.aps.org/abstract/PRB/v60/i7/p5009_1 publisherOptical absorption of continuous-network-structure (CNS) Ag and Ir films has been measured in the photonenergy range of 0.5-6.5 eV. As absorption due to conduction electrons, optical plasma-resonance absorption (OPRA), reported for Ag island films consisting of Ag particles, and weak Drude-type absorption (DTA) were found for the CNS Ag films, and only the weak DTA appeared in the CNS Ir films. The finding of the OPRA indicates that particlelike regions, where plasma oscillations of conduction electrons occur as in Ag particles, are present in the CNS Ag films. When the particlelike regions are formed, the region, where DTA occurs, is reduced. This reduction results in the weakening of the DTA. Thus the weak DTA supports the presence of the particlelike regions. If particlelike regions are present in the CNS Ir films also, conduction-electron localization as in Ir particles should occur in the particlelike regions. In this case, only the DTA, weak as in the CNS Ag films, must appear. This agrees with the above appearance. Thus conduction-electron-localized regions are present in the CNS Ir films

show abstract

Optical absorption of submonolayer silver films: Size dependence of ϵbound in small island particles

Cited by 34 publications

References 19 publications

Silver Nanocrystals: Self-Organization and Collective Properties

Silver Nanocrystals: Self-Organization and Collective Properties

Collective optical properties of silver nanoparticles organized in two-dimensional superlattices

Optical absorption of continuous-network-structure Ag and Ir films: Presence of particlelike and conduction-electron-localized regions

Contact Info

Product

Resources

About