Results 51 to 60 of about 218,762 (405)

Idiocyclophanous Crystals of Calcite [PDF]

open access: yesNature, 1890
IT seems to have escaped notice that one at least of the many crystal-forms of calcite can be induced to show its ring-system—can be made, in fact, into a Bertrand prism—simply by proper cleavage, without any artificially-worked planes at all.
openaire   +2 more sources

Optical alignment and spinning of laser-trapped microscopic particles [PDF]

open access: yes, 1998
Light-induced rotation of absorbing microscopic particles by transfer of angular momentum from light to the material raises the possibility of optically driven micromachines.
A Ashkin   +9 more
core   +2 more sources

Control of crystal polymorph in microfluidics using molluscan 28 kDa Ca2+-binding protein [PDF]

open access: yes, 2010
Biominerals produced by biological systems in physiologically relevant environments possess extraordinary properties that are often difficult to replicate under laboratory conditions.
Cusack, M.   +5 more
core   +1 more source

The onset of the Dead Sea transform based on calcite age-strain analyses

open access: yes, 2017
The onset and evolution of the Dead Sea transform are re-evaluated based on new in situ U-Pb dating and strain analyses of mechanically twinned calcites.
P. Nuriel   +4 more
semanticscholar   +1 more source

Quantum Dots and Perovskites‐Based Physically Unclonable Functions for Binary and Ternary Keys via Optical‐to‐Electrical Conversion

open access: yesAdvanced Functional Materials, EarlyView.
This study investigates optoelectronic PUFs that improve on traditional optical and electrical PUFs. The absorber materials are randomly coated through spray coating, ligand exchange, and dynamic spin coating. Incident light generates wavelength‐dependent binary multikey and enhances security ternary keys, approaching near‐ideal inter‐ and intra ...
Hanseok Seo   +6 more
wiley   +1 more source

Effects of salinity, organic acids and alkalinity on the growth of calcite spherulites: Implications for evaporitic lacustrine sedimentation

open access: yesThe Depositional Record, 2022
Lacustrine non‐skeletal carbonates exhibit a diversity of petrographies due to interactions between physico‐chemical and biologically influenced mechanisms. Despite the suggestion that evaporative concentration was involved in the formation of spherulite
Ramon Mercedes‐Martín   +3 more
doaj   +1 more source

On the quantitative thermogravimetric analysis of calcite content in hydrated cementitious systems [PDF]

open access: yes, 2017
Calcite is a compound that is present in hydrated cementitious materials when carbonation of portlandite occurs or when limestone constituents are used.
De Belie, Nele   +3 more
core   +1 more source

3D Concrete Printing of Triply Periodic Minimum Surfaces for Enhanced Carbon Capture and Storage

open access: yesAdvanced Functional Materials, EarlyView.
A 3D‐printable and carbon‐capturing concrete is developed by replacing cement with diatomaceous earth (DE), which enhances rheology, provides hierarchical porosity, and serves as a nucleation site for carbonation. Maximum absorption of 488.7 gCO2 kgcement−1 is achieved in 7 days, a 142% increase over conventional concrete, and the triply periodic ...
Kun‐Hao Yu   +9 more
wiley   +1 more source

Formation and structure of calcium carbonate thin films and nanofibers precipitated in the presence of poly(allylamine hydrochloride) and magnesium ions [PDF]

open access: yes, 2013
That the cationic polyelectrolyte poly(allylamine hydrochloride) (PAH) exerts a significant influence on CaCO₃ precipitation challenges the idea that only anionic additives have this effect. Here, we show that in common with anionic polyelectrolytes such
Cantaert, Bram   +6 more
core   +2 more sources

Anisotropic Shear Properties of Organic Interfaces in Bio‐composite Materials

open access: yesAdvanced Functional Materials, EarlyView.
A novel cantilever design enables direct probing of shear properties at single organic interfaces within biocomposite prismatic ultrastructures. By decoupling lateral and torsional shear responses, the method reveals isotropic behavior in Atrina vexillum and pronounced anisotropy in Unio pictorum.
Kian Tadayon   +2 more
wiley   +1 more source

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