X-Ray Diffraction and Scattering on Acoustic Phonons

Zolotoyabko, E.

doi:10.1016/b978-012445760-7/50020-4

Cited by 3 publications

(3 citation statements)

References 53 publications

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“…This trend is demonstrated in Figure S4, where the (100) reflection, which represents the a-parameter, is shown to shift to higher 2θ values (corresponding to a smaller d-spacing). 82 On the contrary, the (002) reflection, which represents the cparameter, shifts to lower 2θ values (corresponding to a higher d-spacing). Upon heating (300 °C for 3 h, under an ambient atmosphere), the organics degrade 16 and the induced strains relax (Figure S6a,b).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Effect of Nucleotides on the Phase and Crystal Structure of Synthetic Calcium Carbonate

Lang

Polishchuk

Katsman

et al. 2023

Crystal Growth & Design

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The interactions of organic hereditary materials (i.e., DNA and RNA) with inorganic minerals are of key importance in many fields of research, from archeology and paleontology to medicine. It was previously shown that the building blocks of the main structural biomacromolecules, amino acids and monosaccharides, can be incorporated into the crystal lattice of calcium carbonate (CaCO 3 ), the most abundant biomineral. Here, we continue this reductionist approach and study how the mineral host is affected when grown in the presence of mono-or triphosphate nucleotides�the building blocks of nucleic acids. We show that the nucleotides facilitate the stabilization of the amorphous polymorph of CaCO 3 , as well as promote the formation of vaterite, its least thermodynamically stable anhydrous crystalline phase. We use high-resolution powder X-ray diffraction, and a variety of chemical analysis tools, to demonstrate the mechanism by which nucleotides become incorporated within the vaterite lattice.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Effect of Nucleotides on the Phase and Crystal Structure of Synthetic Calcium Carbonate

Lang

Polishchuk

Katsman

et al. 2023

Crystal Growth & Design

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“…The totality of studies carried out here, including AFM [77], x-ray diffraction analysis [78], and Raman spectroscopy [79], testify that due to the intensive trampoline sputtering [31], the ejection of target material and the subsequent deposition occur in the form of nanoclusters [13,29,66,67]. Hence, nanostructured films grow on structured substrates as well as on unstructured ones.…”

Section: (B)mentioning

confidence: 97%

Effect of trampoline sputtering on surface morphology and coatings properties

Gabovich¹,

Semeniuk²,

Semeniuk³

2021

J. Phys. D: Appl. Phys.

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The collective trampoline ion-plasma effect was used to modify surface properties of metals, ceramics, silicon and carbon in a desired manner. The rough surfaces created by low-energy dense ion flows were demonstrated to include double-level hierarchical structures. Namely, the submicron and nanoscale peaks and valleys were found. The coating films were deposited by the nanoclusters emitted in the trampoline mode, as well as by plasma-enhanced chemical vapor deposition (PECVD) and physical vapor deposition (PVD) methods. The substrates were prepared by prior ion processing in the trampoline mode. Preliminary nanoscale texturing of surfaces substantially modified the interaction of ion-plasma flows with surfaces during the subsequent film formation by PVD and PECVD techniques. The so created rough surface showed the strong film adhesion and a 25%–50% faster film formation during ion-plasma deposition as compared to the case of a non-textured surface. The transfer of target material in the form of nanoclusters allowed obtaining dense defect-free micron-scale films. The submicron structure leads to the infrared and visible light trapping. The results were analyzed on the basis of the previously suggested qualitative model of the trampoline sputtering.

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“…In this context, the use and combination of X-ray-based, photon-in, and photon-out techniques, such as X-ray scattering [19] and X-ray absorption spectroscopy [20] appear favorable. While X-ray scattering probes the sample structure at a long range, providing detailed information about crystalline structures, their size and orientation [19], X-ray absorption spectroscopy techniques (EXAFS and XANES) are sensitive to the short-range order around the X-ray absorbing atom, its chemical valence and the bond geometry [20]. Thus, EXAFS and XANES are well-suited for investigating amorphous materials, molecular complexes, and liquids [20,21].…”

Section: Introductionmentioning

confidence: 99%

In Situ Observation of ZnO Nanoparticle Formation by a Combination of Time-Resolved X-ray Absorption Spectroscopy and X-ray Diffraction

et al. 2022

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The formation of ZnO nanomaterials from different Zn acetylacetonate precursor solutions was studied in situ by employing simultaneous, time-resolved X-ray diffraction (XRD) and X-ray absorption spectroscopy (EXAFS) at the Zn K-edge. The precursor solutions were heated from room temperature to the desired reaction temperatures in a hermetically sealed cell dedicated to X-ray experiments. In general, the first indications for the formation of hexagonal ZnO were found for elevated temperatures of about 80 °C both by XRD and EXAFS, and the contributions increase with temperature and time. However, no reaction intermediates could be proved in addition to the Zn precursors and the formed hexagonal ZnO materials. Furthermore, the results show that the efficiency of the reaction, i.e., the conversion of the precursor material to the ZnO product, strongly depends on the solvent used and the reaction temperature. ZnO formation is accelerated by an increased temperature of 165 °C and the use of 1-octanol, with a conversion to ZnO of more than 80% after only a ca. 35 min reaction time according to a detailed analysis of the EXAFS data. For comparison, an identical concentration of Zn acetylacetonate in water or dilute alkaline NaOH solutions and a reaction temperature of around 90 °C leads to a smaller conversion of approximately 50% only, even after several hours of reaction. The particle size determined from XRD for different orientations shows a preferred orientation along the c-direction of the hexagonal crystal system, as well in accordance with scanning electron microscopy. The LaMer model explained this highly non-uniform growth of needle-like ZnO crystallites.

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X-Ray Diffraction and Scattering on Acoustic Phonons

Cited by 3 publications

References 53 publications

Effect of Nucleotides on the Phase and Crystal Structure of Synthetic Calcium Carbonate

Effect of Nucleotides on the Phase and Crystal Structure of Synthetic Calcium Carbonate

Effect of trampoline sputtering on surface morphology and coatings properties

In Situ Observation of ZnO Nanoparticle Formation by a Combination of Time-Resolved X-ray Absorption Spectroscopy and X-ray Diffraction

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