The amorphous form of pharmaceutical materials represents the most energetic solid state of a material. It provides advantages in terms of dissolution rate and bioavailability. This review presents the methods of solid- -state amorphization described in literature (supercooling of liquids, milling, lyophilization, spray drying, dehydration of ...

Impressively, high-loading single-atom doped (over 10 atom %) In 2 O 3 NSs were obtained. Additionally, Cu/a-In 2 O 3 NSs exhibit an excellent ethanol yield (798.7 μmol g -1 h -1) with a high selectivity of 99.5% for the CO 2 photoreduction. This work offers a new approach to induce CE reactions in metal oxides under mild conditions and ...

Low aqueous solubility of drug candidates is an ongoing challenge and pharmaceutical manufacturers pay close attention to amorphization (AMORP) technology to improve the solubility of drugs that dissolve poorly. Amorphous drug typically exhibits much higher apparent solubility than their crystalline form due to high energy state that …

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Surface amorphization provides electrocatalysts with more active sites and flexibility. However, there is still a lack of experimental observations and mechanistic …

Abstract. Amorphous solid dispersion is a popular formulation approach for orally administered poorly water-soluble drugs, especially for BCS class II. But oral delivery could not be an automatic choice for some drugs with high first-pass metabolism susceptibility. In such cases, transdermal delivery is considered an alternative if the drug …

In this work, by a time-dependent density-functional theory molecular-dynamics study, the physics underlying the optical excitation induced amorphization of Sc-Sb-Te is revealed, which goes back ...

The SrIrO 3 amorphization is initiated by the lattice oxygen redox, a step that allows Sr 2+ to diffuse and O 2− to reorganize the SrIrO 3 structure. This activation …

The amorphization of dc-Si via an intermediate dh-Si phase is a previously unknown pathway of solid-state amorphization. Silicon nanocrystals under shear stress go through an intermediate, diamond ...

Abstract. This paper presents results on the microstructure and physical properties of SiC amorphized by both ion and neutron irradiation. Specifically, 0.56 MeV Si ions have been implanted in single crystal 6H–SiC from ambient through >200°C and the critical threshold for amorphization was measured as a function of the irradiation …

To investigate the influence of crystal orientations on the atomic diffusion of the C/A Mg/(MgCu) 100-x Y x dual-phase Mg alloys (where x is the atomic percentage of Y element in the amorphous layer), five models with different crystalline phase orientations are considered. Here, the initial amorphous layer thickness and the initial concentration …

Elctrochemical water splitting is of vital significance for energy conversion and storage. Here the authors show an electrocatalyst based on amorphous ruthenium-tellurium porous nanorods which ...

Abstract. Amorphization of crystalline structures is a ubiquitous phenomenon in metals, ceramics, and intermetallic compounds. Although the amorphous phase …

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Bridgmanite formation and amorphization in shocked meteorites constrain the pressure and temperature conditions during planetary impact. However, the effect of the bridgmanite grain size on its amorphization kinetics is still unclear. Here, the amorphization mechanism and kinetics of fine-grained polycrystalline bridgmanite were …

This is known as the Gibbons's heterogenous model. His ideas were recently largely validated with experiments using in situ TEM light and heavy-ion irradiations [26,27] as well as via 3D ...

The process of amorphization can release the large deviatoric stresses developed at the intersections of defects (dislocations, stacking faults, and twins) or …

Abstract. To better understand the radiation response of zirconium carbide (ZrC), and in particular its excellent resistance to amorphization, we have used density functional theory methods to study the kinetics of point defects in ZrC. The migration barriers and recombination barriers of the simple point defects are calculated using the …

Abstract. Amorphization technology has been the subject of continuous attention in the pharmaceutical industry, as a means to enhance the solubility of poorly water-soluble drugs. Being in a high energy state, amorphous formulations generally display significantly increased apparent solubility as compared to their crystalline counterparts ...

Microscopic observations indicate that amorphization of a-quartz begins with formation of crystallographically controlled planar defects and is followed by growth of amorphous silicon dioxide at these defect sites. Similar transformation microstructures are found in quartz upon quasihydrostatic and nonhydrostatic compression in a diamond …

Amorphization at grain boundaries in olivine-rich rocks under stress and consequent grain-boundary sliding could explain the decrease in viscosity between the lithosphere and the asthenosphere.

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In the present article, we develop a new rationale of amorphization in boron carbide, identifying links between thermodynamic conditions of amorphization and the …

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Amorphization technology has been the subject of continuous attention in the pharmaceutical industry, as a means to enhance the solubility of poorly water-soluble drugs. Being in a high energy state, amorphous formulations generally display significantly increased apparent solubility as compared to their crystalline counterparts, which may …

In this section we will present a general framework for amorphization by mechanical means. A simple criterion is: G c + G d > G a where the subscripts c and a …

Inset: Final pressure for each strain value. ( C and D) Snapshots of single-crystalline stishovite at t = 7.05 ps (C) and amorphized SiO 2 at t = 9.06 ps (D). Open in …

Movie S2 shows the change of atomic configurations from the stishovite to amorphous phases. From λ = 0 to 0.33, we observe breakage of an Si-O bond (pointed by the green arrow in Fig. 4E ). This is followed by breakage of a second Si-O bond (pointed by the green arrow in Fig. 4F) from λ = 0.33 to 0.67.

Abstract. Below a critical particle size, some pressurized compounds (e.g. TiO2, Y2O3, PbTe) undergo a crystal-to-amorphous transformation instead of a polymorphic transition. This effect reflects the greater propensity of nanomaterials for amorphization. In this work, a panorama of thermodynamic interpretati ….

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Pressure-induced amorphization occurs when the metastable extension of the melting curve (dT m /dP) of a low-density crystal phase is intercepted during compression 10 (here T m is the melting ...

Physica B 153 (1988) 93-135 North-Holland, Amsterdam AMORPHIZATION BY BALL MILLING. A REVIEW A.W. WEEBER and H. BAKKER Natuurkundig Laboratoriurn der Universiteit van Amsterdam, Valckenierstraat 65, NL-IOI8 XE Amsterdam, The Netherlands" Received 1 March 1988 A new method for the preparation of amorphous alloys is the …

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Last updated February 23, 2024. How to say amorphization in English? Pronunciation of amorphization with 1 audio pronunciation, 1 meaning, 5 translations and more for amorphization.

At high stresses beyond the Hugoniot elastic limit (HEL), boron carbide exhibits structural collapse through pressure-induced amorphization, which is observed in shock tests, 15 indentations, 16,17 and diamond-anvil cell experiments. 18 Evidence for amorphization is found in TEM images, 15,17 wherein amorphous islands have been …