Optical hydrogen sensitivity of noble metal–tungsten oxide composite films prepared by sputtering deposition

Ando, Masanori; Chabicovsky, R.; Haruta, Masatake

doi:10.1016/s0925-4005(01)00561-5

Cited by 70 publications

(37 citation statements)

References 14 publications

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“…Most of the studies are related to ultra-fine particles production, direct catalyst deposition on a support [13,14] and also assistance of catalytic reactions [15,16]. Although very few studies are devoted to low pressure plasma deposition of catalytic thin films, the latter is expected to be advantageous for controlling low catalyst content and location [17][18][19][20][21][22][23]. The present study reports on a new fabrication method using plasma sputtering for obtaining an active carbon layer loaded with platinum.…”

Section: Introductionmentioning

confidence: 99%

Carbon/platinum nanotextured films produced by plasma sputtering

Rabat

Andreazza

Brault

et al. 2009

Carbon

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Platinum loaded carbon layers were synthesized by a two-step plasma sputtering process. 200 nm thick columnar (columns with an average diameter of 20 nm) carbon films having a large open porosity were formed in the first step. Using the same plasma system, the films were subsequently loaded with platinum. SEM, TEM and Rutherford backscattering spectrometry analysis show that platinum diffuses into the carbon layer and forms nano-sized particles (mean diameter ca. 3 nm) along and around the carbon nanocolumns and down to the film/support interface. Optimized catalytic layers were formed at low plasma pressure operation (<1 Pa) and had an upper platinum loading limit of about 0.1 mg.cm -2 .

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Section: Introductionmentioning

confidence: 99%

Carbon/platinum nanotextured films produced by plasma sputtering

Rabat

Andreazza

Brault

et al. 2009

Carbon

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“…On the contrary for H 2 the type 2 effect is the most probable, because both the shape and the position of SPR change (Figures 8 and 9b), in contrast with observations summarized by Ando et al for NiOAu systems. 18 The H 2 detection mechanism is perhaps specific to the system Au-NiO described here, as studies determining the H 2 effects upon optical properties of other Au-metal oxides systems, such as Au-Co 3 O 4 , 4,17 Au-WO 3 , 20 and Au-In x O y N z , 21 report that H 2 exposure causes an increase of optical absorption in SPR frequencies together with no substantial change in SPR band maximum wavelength, with the exception of a slight shift described in ref 21.…”

Section: Resultsmentioning

confidence: 98%

Growth of Cookie-like Au/NiO Nanoparticles in SiO₂ Sol–Gel Films and Their Optical Gas Sensing Properties

Buso

Guglielmi

Martucci

et al. 2008

Crystal Growth & Design

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The favorable lattice matching between Au and NiO crystals made possible the growth of unique cookie-like nanoparticles (25 nm mean diameter) inside a porous SiO2 film by simply tailoring the film synthesis parameters. The unusual aggregates result from the coupling of well distinguishable Au and NiO hemispheres, which respectively face each other through the (100) and (200) lattice planes. High resolution transmission electron microscopy analysis revealed that the 2-fold nanostructures show a sharp flat interface with epitaxial coherence between the Au and NiO phases. The surface plasmon resonance (SPR) bands observed in optical absorption spectra provides evidence for the effect of the atypical dielectric nature of the media surrounding the Au aggregates. The films show noticeable and reversible change in the optical transmittance when exposed to CO and H2, with different features according to the detected species. The presence of CO does not modify the maximum SPR band wavelength, while H2 induces a clear shift of the overall plasmonic resonance frequencies.

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“…In 1993 and the following years Haruta et al, in their pioneering work, investigated the gas sensing performance of Au composite fi lms of transition metal oxides with focus on NiO fi lms [84 -86] and later also other composite systems including CuO [87] , WO [88] and CO 3 O 4 [89] . In 2009, Buso et al used gold nanoparticle monolayers for the reversible detection of CO (100 -10000 ppm) at 300 ° C [90] .…”

Section: Gas Sensing and Catalysis Applicationsmentioning

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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Optical hydrogen sensitivity of noble metal–tungsten oxide composite films prepared by sputtering deposition

Cited by 70 publications

References 14 publications

Carbon/platinum nanotextured films produced by plasma sputtering

Carbon/platinum nanotextured films produced by plasma sputtering

Growth of Cookie-like Au/NiO Nanoparticles in SiO₂ Sol–Gel Films and Their Optical Gas Sensing Properties

Nanoplasmonic sensing for nanomaterials science

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Optical hydrogen sensitivity of noble metal–tungsten oxide composite films prepared by sputtering deposition

Cited by 70 publications

References 14 publications

Carbon/platinum nanotextured films produced by plasma sputtering

Carbon/platinum nanotextured films produced by plasma sputtering

Growth of Cookie-like Au/NiO Nanoparticles in SiO2 Sol–Gel Films and Their Optical Gas Sensing Properties

Nanoplasmonic sensing for nanomaterials science

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Product

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Growth of Cookie-like Au/NiO Nanoparticles in SiO₂ Sol–Gel Films and Their Optical Gas Sensing Properties