English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Rod-like Colloidal Crystals of β-FeOOH with a square cross section (140-420 nm in length and 20-110 nm in width) were prepared from ferric chloride solutions. The crystal dimensions and the distributions were measured as a function of temperature, ferric chloride concentration, and age of the solutions using TEM, and the surface structures of the crystals were investigated using AFM. The results from TEM images for the crystals are as follows, (1) The dimensions (showing significant narrow distributions) decreased as the solution temperature increased. With increasing ferric chloride concentration, the length showed a maximum value at around 20 mM at a solution temperature of 15oC. The resulting aspect ratios showed an increase with increasing ferric chloride concentration and decreasing solution temperature. (2) The dimensions of the crystals growing in ferric chloride solutions at 15oC were measured for a period of 30-290 days. The measured lengths were found to be fittable with a linear combination of sigmoidal and linear curves. Smectic layers spontaneously appeared over a wide area from evaporating droplets of the β-FeOOH crystal suspensions on glass substrates. AFM surface images of the crystals forming the smectic phase showed various shapes of islands with a minimal step-height of 1.09 nm but no spiral steps due to line dislocations, suggesting that the crystal growth process consists of two dimensional nucleus formation and subsequent lateral growth of molecular layers on the crystal surfaces.

acta crystallographica. section a, foundations of crystallography/acta crystallographica. section a

An atomic force microscopy study of surface structures of colloidal β-FeOOH crystals forming smectic layers and crystal size evaluation with electron microscope