Etching of MgO crystals in acids: surface micromorphology

Sangwal, K.; Sutaria, J. N.

doi:10.1007/bf00752091

Cited by 35 publications

(9 citation statements)

References 15 publications

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“…Therefore, the appearance of etch pits as those observed on cleaved MgO(1 0 0) [17,[25][26][27][28][29] is not awaited during the dissolution process. During dissolution in pure water with neutral pH= 6.8 ( Fig.…”

Section: Dissolution In Wet Environmentmentioning

confidence: 99%

Morphology of MgO smoke crystallites upon etching in wet environment

Hacquart

Jupille

2009

Journal of Crystal Growth

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Section: Dissolution In Wet Environmentmentioning

confidence: 99%

Morphology of MgO smoke crystallites upon etching in wet environment

Hacquart

Jupille

2009

Journal of Crystal Growth

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“…Finally, it may be mentioned that the density of emerging steps and pinning centres, estimated to be about 10 6 cm -2 , is of the order of the dislocation density obtained from etchpit patterns on the {100} faces of MgO crystals (SANGWAL, SUTARIA 1976;SANGWAL et al 1979).…”

Section: Discussionmentioning

confidence: 98%

Study of the Nature and Distribution of Elementary Steps on the (100) Cleavage Faces of MgO Single Crystals by Atomic Force Microscopy

Sangwal

Gorostiza

Sanz

et al. 2000

Cryst. Res. Technol.

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“…Finally, it is interesting to compare our results with similar studies, which -e. g. -explore the role of the pH, on inorganic crystals and where AFM is exploited to observe nano-defects on macroscopic crystals. We note that etch-pits [39][40][41][42] are observed together with 3-D structures, sometimes called hillocks (e. g., in Refs. 43 and 44) or bulges.…”

Section: Discussionmentioning

confidence: 99%

Reactive Dissolution of Organic Nanocrystals at Controlled pH

et al. 2020

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The development of novel protocols and techniques for waste treatment represents the state of the art in the so‐called “green conversion”. Chemical wastes deriving from industrial and power‐station processes, which involve organic crystals, can be very hazardous for the environment. Studying their dissolution mechanism, both theoretically and experimentally, represents a mandatory step in the critical task of their disposal. Surprisingly, most of the studies are focused on millimeter scale length, from which one could estimate the crystal dissolution rate. In these studies, where no information about the dissolution mechanism on a molecular scale is provided, etch‐pit formation is recognized as the ultimate mechanism of crystal dissolution. In this work, we show the morphological evolution of organic nanocrystals on the sub‐micrometer scale range in a reactive dissolution process controlled by pH. This approach allows us to explore ranges of high undersaturation, whereby crystal dissolution occurs even though etch‐pit formation is suppressed. Adopting different surface and bulk‐sensitive techniques (atomic force microscopy, time‐of‐flight secondary ion mass spectroscopy and X‐ray/electron diffraction, Raman spectroscopy, respectively), we investigate the dissolution process of porphyrin thin films deposited on the basal plane of highly oriented pyrolytic graphite, proving that such films constitute a model system to unveil the dissolution mechanism of organic nanocrystals.

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Etching of MgO crystals in acids: surface micromorphology

Cited by 35 publications

References 15 publications

Morphology of MgO smoke crystallites upon etching in wet environment

Morphology of MgO smoke crystallites upon etching in wet environment

Study of the Nature and Distribution of Elementary Steps on the (100) Cleavage Faces of MgO Single Crystals by Atomic Force Microscopy

Reactive Dissolution of Organic Nanocrystals at Controlled pH

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