Temperature dependence of the surface plasmon resonance of Au/SiO2 nanocomposite films

Dalacu, Dan; Martinů, L.

doi:10.1063/1.1334362

Cited by 47 publications

(42 citation statements)

References 29 publications

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“…4 that in sample AT4 with lowest filling factor of 0.07 the jumplike features in temperature dependences of SP energy and bandwidth are manifested quite slightly, i.e., the melting transition occurs most gradually. That approaches such melting to the case of isolated small copper 19 and gold 31 nanoparticles with sizes smaller than d 2 which melt gradually, i.e., without the nonmonotonic jumplike features in temperature dependences of SP spectral characteristics. So, the size ͑5 nm͒ of gold nanoparticles in a sample with f = 0.07 is close ͑a little higher͒ to d 2 .…”

Section: -3mentioning

confidence: 90%

“…It was recently observed 19,31 that the temperature dependences of SP absorption band for small copper and gold nanoparticles are quite different from the ones for large particles. Namely, for small particles the behavior of SP energy and bandwidth with temperature is monotonic and is not characterized by abrupt jump at melting point.…”

Section: -3mentioning

confidence: 98%

“…Namely, for small particles the behavior of SP energy and bandwidth with temperature is monotonic and is not characterized by abrupt jump at melting point. Let us note that temperatures reached in experiments 19,31 with small Cu and Au nanoparticles are sufficient for melting of nanoparticles. So, the melting of small nanoparticles occurs in other way than for large ones.…”

Section: -3mentioning

confidence: 99%

See 2 more Smart Citations

Influence of interparticle interaction on melting of gold nanoparticles in Au/polytetrafluoroethylene nanocomposites

Yeshchenko

Dmitruk

Grytsenko

et al. 2009

Journal of Applied Physics

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The temperature dependence of the surface plasmon resonance energy and width in 5 nm spherical gold nanoparticles embedded in a polymer polytetrafluoroethylene matrix has been studied using absorption spectroscopy. The jumplike features have been observed in these dependences indicating the melting of gold nanoparticles at temperatures considerably lower than the bulk melting point. The interaction between gold nanoparticles sufficiently affects the melting of nanoparticles. The increase in the filling factor of the particles leads to a decrease in the melting temperature of gold nanoparticles.

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Section: -3mentioning

confidence: 90%

Section: -3mentioning

confidence: 98%

Section: -3mentioning

confidence: 99%

See 1 more Smart Citation

Influence of interparticle interaction on melting of gold nanoparticles in Au/polytetrafluoroethylene nanocomposites

Yeshchenko

Dmitruk

Grytsenko

et al. 2009

Journal of Applied Physics

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“…The application of LSPR to study the melting transition of metallic nanoparticles was fi rst demonstrated by Dalacu and Martinu in 2000 [69] . They studied both the intra-and interband responses of small gold nanoparticles (1.6 -20 nm) in a temperature range that included the melting temperature.…”

Section: Melting/freezing Transitionmentioning

confidence: 99%

Nanoplasmonic sensing for nanomaterials science

Larsson¹,

Syrenova

Langhammer

2012

Nanophotonics

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Nanoplasmonic sensing has over the last two decades emerged as and diversifi ed into a very promising experimental platform technology for studies of biomolecular interactions and for biomolecule detection (biosensors). Inspired by this success, in more recent years, nanoplasmonic sensing strategies have been adapted and tailored successfully for probing functional nanomaterials and catalysts in situ and in real time. An increasing number of these studies focus on using the localized surface plasmon resonance (LSPR) as an experimental tool to study a process of interest in a nanomaterial, with a materials science focus. The key assets of nanoplasmonic sensing in this area are its remote readout, non-invasive nature, single particle experiment capability, ease of use and, maybe most importantly, unmatched fl exibility in terms of compatibility with all material types (particles and thin/thick layers, conductive or insulating) are identifi ed. In a direct nanoplasmonic sensing experiment the plasmonic nanoparticles are active and simultaneously constitute the sensor and the studied nano-entity. In an indirect nanoplasmonic sensing experiment the plasmonic nanoparticles are inert and adjacent to the material of interest to probe a process occurring in/on this material. In this review we defi ne and discuss these two generic experimental strategies and summarize the growing applications of nanoplasmonic sensors as experimental tools to address materials science-related questions.

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“…Nanocomposite films consisting of metal particles such as gold embedded in a silica matrix have recently been the subject of many studies [16]- [28]. A large number of methods have been used to obtain AuNPs embedded in SiO 2 films, such ion implantation [29] [30], sol-gel [31], plasma enhanced chemical vapor deposition (PECVD) [32], hybrid techniques combining pulsed-DC sputtering and PECVD, which is used for simultaneous Au sputtering and SiO 2 deposition [18] [19], and RF magnetron sputtering [33]- [38]. The flexibility and easy fabrication of diverse composite films are the advantages of sputtering method.…”

Section: Introductionmentioning

confidence: 99%

Effect of Substrate Temperature on Structural and Optical Properties of Au/SiO2 Nanocomposite Films Prepared by RF Magnetron Sputtering

Belahmar¹,

Chouiyakh²

2017

OALib

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Silica films containing gold nanoparticles were grown by magnetron radio frequency (rf) sputtering technique under various deposition conditions. The structural and optical properties of the composite films deposited at 400˚C substrate temperature were compared with those deposited at room temperature. Effect of substrate temperature of AuNPs on micro structural properties of the Au/SiO 2 nanocomposite films, such as size, dislocation density (δ), strain (ε) and lattice distortion (LD) have been investigated. The face-centered cubic crystalline structure of Au nanoparticles inclusion in the amorphous silica dielectric matrix was confirmed using X-ray diffraction. The average grain size of AuNPs has been found in the range of 0.56 -0.60 nm and 1.15 -1.23 nm at 3 × 10 −3 mbar and 2 × 10 −3 mbar argon pressure respectively. The δ, ε, LD values change inversely with the increasing of the substrate temperatures. These composites exhibit the optical features of a semiconductor with direct band gap. The band gap energy of 3.85 eV and 4.1 eV achieved for gold nanoparticles when the substrate temperatures increases from 25˚C to 400˚C. A peak wavelength of the surface plasmon resonance band absorption (SPR) characteristic of gold nanoparticle was found around 500 nm for the sample deposited at 2 × 10 −3 mbar and at 400˚C substrate temperature.

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Temperature dependence of the surface plasmon resonance of Au/SiO2 nanocomposite films

Cited by 47 publications

References 29 publications

Influence of interparticle interaction on melting of gold nanoparticles in Au/polytetrafluoroethylene nanocomposites

Influence of interparticle interaction on melting of gold nanoparticles in Au/polytetrafluoroethylene nanocomposites

Nanoplasmonic sensing for nanomaterials science

Effect of Substrate Temperature on Structural and Optical Properties of Au/SiO2 Nanocomposite Films Prepared by RF Magnetron Sputtering

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