Neutron scattering study of the vibrations in vitreous silica and germania

Author(s): Fabiani E, Fontana A, Buchenau U

Abstract

The incoherent approximation for the determination of the vibrational density of states of glasses from inelastic neutron or x-ray scattering data is extended to treat the coherent scattering. The method is applied to new room temperature measurements of vitreous silica and germania on the thermal time-of-flight spectrometer IN4 at the High Flux Reactor in Grenoble. The inelastic dynamic structure factor at the boson peak turns out to agree reasonably well with simulation results, but the long-wavelength fraction exceeds the expectation of the Debye model, in particular, in germania.

Similar Articles

Connection between the vibrational dynamics and the cross-linking properties in cyclodextrins-based polymers

Author(s): Crupi V, Fontana A, Giarola M, Majolino D, Mariotto G, et al.

Cyclodextrin-based nanosponges as drug carriers

Author(s): Trotta F, Zanetti M, Cavalli R

Nanosponge formulations as oxygen delivery systems

Author(s): Cavalli R, Akhter AK, Bisazza A, Giustetto P, Trotta F, et al.

Cyclodextrin-based nanosponges: a propitious platform for enhancing drug delivery

Author(s): Chilajwar SV, Pednekar PP, Jadhav KR, Gupta GJ, Kadam VJ

Cyclodextrin-based nanogels for pharmaceutical and biomedical applications

Author(s): Moya-Ortega MD, Alvarez-Lorenzo C, Concheiro A, Loftsson T

Tamoxifen citrate loaded amphiphilic beta-cyclodextrin nanoparticles: in vitro characterization and cytotoxicity

Author(s): Memisoglu-Bilensoy E, Vural I, Bochot A, Renoir J M, Duchene D, Hincal A A

The application of nanosponges to cancer drug delivery

Author(s): Trotta F, Dianzani C, Caldera F, Mognetti B, Cavalli R

Phase-controlled supramolecularphoto chirogenesis in cyclodextrinnanosponges

Author(s): Liang W, Yang C, Zhou D, Haneoka H, Nishijima M, et al.

Regenerative medicine and stem cell based drug discovery

Author(s): Sakurada K, McDonald FM, Shimada F

Hydrogels in regenerative medicine

Author(s): Slaughter BV, Khurshid SS, Fisher OZ, Khademhosseini A, Peppas NA

Hydrogel-based drug delivery systems: comparison of drug diffusivity and release kinetics

Author(s): Brandl F, Kastner F, Gschwind RM, Blunk T, Tessmar J, et al.

Controlled drug delivery in tissue engineering

Author(s): Biondi M, Ungaro F, Quaglia F, Netti PA

Photoencapsulation of chondrocytes in poly(ethylene oxide)-based semi-interpenetrating networks

Author(s): Elisseeff J, McIntosh W, Anseth K, Riley S, Ragan P, et al.

Hydrogen-bond dynamics of water confined in cyclodextrinnanosponges hydrogel

Author(s): Crupi V, Fontana A, Majolino D, Mele A, Melone L, et al.

Collective nature of the boson peak and universal transboson dynamics of glasses

Author(s): Chumakov AI, Sergueev I, van B├╝rck U, Schirmacher W, Asthalter T, et al.

Designing materials for biology and medicine

Author(s): Langer R, Tirrell DA

Photodegradable hydrogels for dynamic tuning of physical and chemical properties

Author(s): Kloxin AM, Kasko AM, Salinas CN, Anseth KS

Anomalous diffusion of Ibuprofen in cyclodextrinnanosponge hydrogels: an HRMAS NMR study

Author(s): Ferro M, Castiglione F, Punta C, Melone L, Panzeri W2, et al.