Adsorption–desorption isotherms of nanoporous thin films measured by X-ray reflectometry

Klotz, Michaela; Rouessac, V.; Rébiscoul, Diane; Ayral, A.; Lee, A. van der

doi:10.1016/j.tsf.2005.08.168

Cited by 17 publications

(12 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this context, XRR can be a suitable method to determine NP inclusion, for it allows the simultaneous and direct determination of density, thickness, and interfacial roughness of thin films from the reflectivity intensity variations with the X‐ray incident angle 27, 28. Recently, XRR was used to monitor capillary condensation of various solvents in meso‐ and nanostructured silica films,29–32 and the metal volume fraction of Au–ceramic nanocomposite films produced by co‐sputtering 33. XRR constitutes a simple and accurate method compared to ellipsometry.…”

Section: Resultsmentioning

confidence: 99%

Controlled Deposition of Silver Nanoparticles in Mesoporous Single‐ or Multilayer Thin Films: From Tuned Pore Filling to Selective Spatial Location of Nanometric Objects

Fuertes

Marchena

Marchi

et al. 2009

Small

101

View full text Add to dashboard Cite

Silver nanoparticle assemblies are embedded within mesoporous oxide thin films by an in situ mild reduction leading to nanoparticle-mesoporous oxide thin-film composites (NP@MOTF). A quantitative method based on X-ray reflectivity is developed and validated with energy dispersive spectroscopy in order to assess pore filling. The use of dilute formaldehyde solutions leads to control over the formation of silver nanoparticles within mesoporous titania films. Inclusion of silver nanoparticles in mesoporous silica requires more drastic conditions. This difference in reactivity can be exploited to selectively synthesize nanoparticles in a predetermined layer of a multilayered mesoporous stack leading to complex 1D-ordered multilayers with precise spatial location of nanometric objects. The metal oxide nanocomposites synthesized have potential applications in catalysis, optical devices, surface-enhanced Raman scattering, and metal enhancement fluorescence.

show abstract

Section: Resultsmentioning

confidence: 99%

Controlled Deposition of Silver Nanoparticles in Mesoporous Single‐ or Multilayer Thin Films: From Tuned Pore Filling to Selective Spatial Location of Nanometric Objects

Fuertes

Marchena

Marchi

et al. 2009

Small

101

View full text Add to dashboard Cite

show abstract

“…X-Ray reflectometry (XRR) can be used to independently obtain the parameters obtained by EP. [84][85][86] The reflectivity critical angle q c allows a direct determination of the film electronic density; film thickness is separately obtained from the Kiessig interference fringes. This information, combined with the results for dense films can be used to determine the accessible and the total film porosity (Fig.…”

Section: Determination Of Film Porosity: Ellipsometric Porosimetry (Ementioning

confidence: 99%

Critical aspects in the production of periodically ordered mesoporous titania thin films

et al. 2012

View full text Add to dashboard Cite

Periodically ordered mesoporous titania thin films (MTTF) present a high surface area, controlled porosity in the 2-20 nm pore diameter range and an amorphous or crystalline inorganic framework. These materials are nowadays routinely prepared by combining soft chemistry and supramolecular templating. Photocatalytic transparent coatings and titania-based solar cells are the immediate promising applications. However, a wealth of new prospective uses have emerged on the horizon, such as advanced catalysts, perm-selective membranes, optical materials based on plasmonics and photonics, metamaterials, biomaterials or new magnetic nanocomposites. Current and novel applications rely on the ultimate control of the materials features such as pore size and geometry, surface functionality and wall structure. Even if a certain control of these characteristics has been provided by the methods reported so far, the needs for the next generation of MTTF require a deeper insight in the physical and chemical processes taking place in their preparation and processing. This article presents a critical discussion of these aspects. This discussion is essential to evolve from know-how to sound knowledge, aiming at a rational materials design of these fascinating systems.

show abstract

“…In particular, the study of the interaction between solvents and mesoporous materials requires specific techniques that can detect small changes in the properties of the thin film during its contact with the solvent. For this purpose, ellipsometric porosimetry has been developed, − and X-ray reflectivity − was adapted. In both cases, dedicated equipment is required to perform the measurements.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Solvent Evaporation from Thin Films by Localized Surface Plasmon Resonance Shifts

Angelomé

Liz‐Marzán

2010

J. Phys. Chem. C

View full text Add to dashboard Cite

In this work, new composite materials consisting of a submonolayer of metallic nanoparticles (spheres or decahedra) chemically bound to a glass slide and covered with a sol-gel thin film (with or without templating) were synthesized. Nanoparticles can be fully covered by well-ordered mesoporous thin films, when templated films are synthesized. The particles underneath the porous films remain accessible but not in direct contact with the outer medium, and their plasmon band shifts with changes in the refractive index of the solvent that wets the film. Taking advantage of this phenomenon, we monitored the evaporation of solvents through changes in the plasmon band position for various thin films and solvents, using UV-visible spectroscopy. This procedure can be generalized to different metal particles, thin films, and solvents, thus paving the way toward new composite materials containing an active layer of metallic particles that can be used to investigate the interactions between solvents and oxide thin films.

show abstract

Adsorption–desorption isotherms of nanoporous thin films measured by X-ray reflectometry

Cited by 17 publications

References 21 publications

Controlled Deposition of Silver Nanoparticles in Mesoporous Single‐ or Multilayer Thin Films: From Tuned Pore Filling to Selective Spatial Location of Nanometric Objects

Controlled Deposition of Silver Nanoparticles in Mesoporous Single‐ or Multilayer Thin Films: From Tuned Pore Filling to Selective Spatial Location of Nanometric Objects

Critical aspects in the production of periodically ordered mesoporous titania thin films

Monitoring Solvent Evaporation from Thin Films by Localized Surface Plasmon Resonance Shifts

Contact Info

Product

Resources

About