Nucleation pathways in barium silicate glasses

McKenzie, Matthew E.; Deng, Binghui; Hoesen, D. C. Van; Xia, Xinsheng; Baker, David E.; Rezikyan, Aram; Youngman, Randall E.; Kelton, K. F.

doi:10.1038/s41598-020-79749-2

Cited by 15 publications

(8 citation statements)

References 65 publications

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“…Below a certain threshold, the sizes of these dynamic regions are too small for nucleation . Ordering occurs first in these dynamic regions, followed by an increasing density (lowering of entropy). , A recent study on protein crystallization using time-resolved liquid-cell TEM demonstrated that proteins in the lattice are mobile throughout the crystal structure in the early stage of crystallization . The intermolecular bonds or contacts can break and reform rapidly, supporting the hypothesis of flexible and dynamic intermediates.…”

Section: Discussion On the Role And The Development Of The Mipmentioning

confidence: 92%

Protein Crystallization from a Preordered Metastable Intermediate Phase Followed by Real-Time Small-Angle Neutron Scattering

Maier

Sohmen

Vela

et al. 2021

Crystal Growth & Design

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We present a systematic study using real-time small-angle neutron scattering (SANS) and optical microscopy to follow the protein crystallization process in the presence of a metastable intermediate phase (MIP). Using bovine β-lactoglobulin (BLG) in the presence of the divalent salt CdCl2 as a model system, we first determine the experimental phase behavior in D2O. The protein solutions become turbid after crossing the first threshold salt concentration c*, and upon further increasing the salt concentration, the solutions become less turbid but not completely clear again. Thus, the second border is called pseudo-c**. Near pseudo-c**, crystallization follows a nonclassical process with a MIP, which is further explored with a focus on the structural evolution and the growth kinetics of the MIP prior to crystal nucleation. Real-time SANS measurements show that a correlation peak develops inside the MIP, and its peak position shifts to higher q-values with time, finally stabilizing at a characteristic length scale of d MIP ≈ 84 Å. The area of this peak (proportional to the amount of MIP in the sample) increases with time first, reaches a maximum, and then decreases quickly upon crystallization due to consumption by crystal growth. The evolution of the correlation peak indicates a “preordering” nature of the MIP as precursors of crystal nucleation, which lowers the nucleation barrier for subsequent crystallization. These results of structural evolution and the role of MIPs during a nonclassical crystallization process may be relevant for other fields ranging from structural biology to pharmacy.

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Section: Discussion On the Role And The Development Of The Mipmentioning

confidence: 92%

Protein Crystallization from a Preordered Metastable Intermediate Phase Followed by Real-Time Small-Angle Neutron Scattering

Maier

Sohmen

Vela

et al. 2021

Crystal Growth & Design

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show abstract

“…Adapted from Ref. 41 with permission from Elsevier Modern computational study of glasses also has advanced to the point in which the study of fracture toughness and crack behavior, 49 or nucleation pathways in glass-ceramic systems, 50 are possible. These advances, in combination with many new developments in terization, will continue to change the way we understand technical glasses.…”

Section: Computational Determination Of Glass Structure and Behaviormentioning

confidence: 99%

A Corning perspective on the future of technical glass in our evolving world

Kohli

Hubert

Youngman

et al. 2022

Int J of Appl Glass Sci

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Glass is a material with a rich history and a bright future. Due to its outstanding properties and its versatility, it is a key material in many applications. In this paper, we present a variety of these applications in which glass is playing, and will continue to play, a significant role, including communication technologies, the semiconductor industry, advanced displays, mobile consumer electronics, healthcare, and automotive. Other critical considerations enabling continuous progress in glass science and engineering, such as improved modeling tools and characterization techniques, increased sustainability of the glass-making process, and talent development, are also discussed.

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“…On this representative image, which refers to the specimen modified with 1% hydrophilic nanoparticles (fracture surface), three spectra were examined. Spectrum 1 reveals that the analyzed particle may be interpreted as ytterbium trifluoride (YbF3) particle [17], while Spectrum 2 indicates that it may be interpreted as barium silicate glass (1BaO 2SiO2) [18,19]. Both ytterbium trifluoride and barium silicate glass are most likely used as fillers in base flowable composite material.…”

Section: 2edx Analysismentioning

confidence: 99%

Mechanical and Rheological Properties of Flowable Resin Composites Modified with Low Addition of Hydrophilic and Hydrophobic TiO2 Nanoparticles

Šarčev¹,

Zlatanović²,

Hadnadjev³

et al. 2021

Mater. Plast.

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The aim of this work was to find the influence of the addition of low amount of hydrophilic and hydrophobic TiO2 nanoparticles on compressive strength, microhardness and rheological properties of flowable dental composite material. Specimens were prepared by adding 0.05; 0.2 and 1 wt. % of hydrophilic and hydrophobic 20 nm TiO2 nanoparticles. These specimens were compared to non-modified control specimens in compressive strength and microhardness. Furthermore, their rheological properties were determined. The optimal nanoparticle loading was 0.2 % hydrophobic TiO2, resulting in significantly higher compressive strength and microhardness than those of the control specimen group. Mechanical properties of flowable composites reinforced with hydrophilic and hydrophobic TiO2 at higher loadings are lower than those of control specimens, which is the result of nanoparticle agglomeration. TiO2 nanoparticles addition resulted in the decrease in viscosity in all specimens except for the specimewn with 1% hydrophilic TiO2 nanoparticles. In accordance to the obtained results, hydrophobic nanoparticle addition results in a more resistant and durable material, combined with an increased flowability compared to a non-modified composite.

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Nucleation pathways in barium silicate glasses

Cited by 15 publications

References 65 publications

Protein Crystallization from a Preordered Metastable Intermediate Phase Followed by Real-Time Small-Angle Neutron Scattering

Protein Crystallization from a Preordered Metastable Intermediate Phase Followed by Real-Time Small-Angle Neutron Scattering

A Corning perspective on the future of technical glass in our evolving world

Mechanical and Rheological Properties of Flowable Resin Composites Modified with Low Addition of Hydrophilic and Hydrophobic TiO2 Nanoparticles

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