Study of short range structure of amorphous Silica from PDF using Ag radiation in laboratory XRD system, RAMAN and NEXAFS

Biswas, Ripan K.; Khan, Prosenjit; Mukherjee, Smita; Mukhopadhyay, Amartya; Ghosh, Jiten; Muraleedharan, K.

doi:10.1016/j.jnoncrysol.2018.02.037

Cited by 154 publications

(94 citation statements)

References 27 publications

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“…However, for the OMCTS‐coated sample, we observed a slight increase in the background signal with a decreasing diffraction angle (2 θ range between 30° and 20°), indicating some amorphous species. We attribute this to the presence of amorphous silica as also observed by Biswas et al [ 26 ] Moreover, a tiny additional peak was observed at (2 θ = 32°), which most probably can be attributed to traces of crystalline SiO 2 . This gives an indication that in the case of OMCTS, silica is more prominent, as can also be expected from the fact that OMCTS produces double the amount of silica compared to HMDSO at the same volume feed rate.…”

Section: Resultssupporting

confidence: 77%

Plasma‐assisted gas‐phase synthesis and in‐line coating of silicon nanoparticles

Dasgupta

Fortugno

Wiggers

2020

Plasma Processes & Polymers

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This study investigates the feasibility of plasma-supported in-line functionalization of silicon nanoparticles (NPs) in an atmospheric pressure gas-phase reactor. The approach utilizes the synthesis of core silicon NPs and their subsequent coating downstream of the particle formation zone. In-line coating is accomplished with a cylindrical coating nozzle to achieve homogenous mixing of coating precursor vapors with in-coming NPs. Multiple siloxanes were tested for their coating suitability and their ability towards coating homogeneity. It was

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Section: Resultssupporting

confidence: 77%

Plasma‐assisted gas‐phase synthesis and in‐line coating of silicon nanoparticles

Dasgupta

Fortugno

Wiggers

2020

Plasma Processes & Polymers

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“…One more possible interpretation for the XRD results is the reaggregated silica in ice, which is dissolved once. Amorphous forms of solid can cause decreased and broadened peaks in XRD analyses [27,28]. In the ice experiments, the dissolved silica from the dissolution of granite could be polymerized to an amorphous form and aggregated at the surface of the granite powder.…”

Section: Silica Polymerization In Ice and Its Implication For Polar Rmentioning

confidence: 99%

Chemical Weathering of Granite in Ice and Its Implication for Weathering in Polar Regions

et al. 2020

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Recently, it has been reported that some chemical reactions are enhanced in below-freezing conditions. Despite the high denudation typical of polar regions, chemical weathering that occurs under ice has not been investigated. In this study, we investigated the dissolution of granite in ice. The mixture of granite and deionized water (DW) or solution adjusted to pH 2 or 3 was split into two groups: the test group was frozen at −20 °C, while the control was maintained at room temperature. After 29 days of batch experiments, the filtrate was analyzed to measure the concentrations of cations and silica. The filtered powder was analyzed to investigate the mineral compositions and crystallinities of the granite before and after the experiments. Despite the low temperature, a significant quantity of cations (Na+, K+, Mg2+, Ca2+) were dissolved out, even from the ice samples. During X-ray diffraction (XRD) analysis, the decreased crystallinities of granite in ice samples were identified regardless of the pH condition. To verify the observed freeze concentration effect, the concentration of granite in the ice grain boundaries was observed using optical microscopy with a cold chamber. The low concentration of silica in the ice samples could explain the silica anomaly in polar regions. This study also provides a new perspective for the dissolution mechanism in polar regions.

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“…In addition, the interactions of collagen peptides with hydroxyapatite surfaces, Hyp‐Pro‐Gly peptide with hydroxyapatite surfaces, and hydroxyapatite with rutile surfaces can be determined by these techniques. These are also used to understand the short‐range interaction in amorphous silica and quartz …”

Section: Introductionmentioning

confidence: 99%

“…These are also used to understand the short-range interaction in amorphous silica and quartz. 27 Recent reports claim that in order to get the desired property and high performance, a comprehensive and systematic study involving both experiment and theory are required to provide an in-depth understanding of interfacial behavior in composites. 23,[28][29][30] Thus, the determination of proper structure and interactions between individual constituents often play very important roles in controlling the properties of nanocomposites.…”

mentioning

confidence: 99%

“…23,[28][29][30] Thus, the determination of proper structure and interactions between individual constituents often play very important roles in controlling the properties of nanocomposites. [23][24][25][26][27]29,30 Hence, it seems plausible to argue that, in order to be able to appropriately control the development of calcium silicate-cellulose nanograss-like nanocomposites, experimental studies are required to understand (a) the growth process of cellulose and (b) the interaction between the organic cellulosic matrix and the calcium silicate crystal. This knowledge in turn helps us to understand how the atomic level binding of fibril like polymeric cellulose structures to the inorganic calcium silicate surfaces occurs.…”

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confidence: 99%

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Synthesis and structure determination of calcium silicate‐cellulose nanograss biocomposite

et al. 2019

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The 100% phase pure calcium silicate nanoparticles (CSNPs) of the α‐wollastonite phase by hydrothermal synthesis is achieved first. Next this work reports the first‐ever microwave‐assisted low temperature synthesis of calcium silicate‐cellulose nanograss composites. The characterization by FESEM studies confirm that calcium silicate‐cellulose composites possess the nanograss like morphology spread over the matrix of calcium silicate. The structural information of the calcium silicate‐cellulose composites are derived by both theoretical and experimental techniques. Low‐energy ground state geometrical structures of the cellulose on the triclinic wollastonite surfaces and their interactions have been primarily determined by Density Functional Theory. Accordingly, the short‐range structural information is confirmed by Pair Distribution Function analysis. Structural information along with binding interactions are also confirmed from X‐ray photoelectron spectroscopy. The implications of these detailed analysis of structures in tuning the properties of such ceramic polymeric hybrid composites for futuristic endodontic application is discussed.

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Study of short range structure of amorphous Silica from PDF using Ag radiation in laboratory XRD system, RAMAN and NEXAFS

Cited by 154 publications

References 27 publications

Plasma‐assisted gas‐phase synthesis and in‐line coating of silicon nanoparticles

Plasma‐assisted gas‐phase synthesis and in‐line coating of silicon nanoparticles

Chemical Weathering of Granite in Ice and Its Implication for Weathering in Polar Regions

Synthesis and structure determination of calcium silicate‐cellulose nanograss biocomposite

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