Growth Habits of Polymer Single Crystals

Detection of Polymer Brushes developed via Single Crystal Growth

Single crystals consisting various surface morphologies and epitaxial structures were applied to investigate the effect of other phase regions in the vicinity of a given tethered chains-covered area having a certain molecular weight of amorphous brushes. The designed experiments demonstrated that regardless of the type of surface morphology (patterned and especial mixed-brushes, homo and co...

Growth of Multiple Crystals in Polymer Melts

Cloning polymer single crystals through self-seeding.

In general, when a crystal is molten, all molecules forget about their mutual correlations and long-range order is lost. Thus, a regrown crystal does not inherit any features from an initially present crystal. Such is true for materials exhibiting a well-defined melting point. However, polymer crystallites have a wide range of melting temperatures, enabling paradoxical phenomena such as the coe...

Selective growth of MFU-4l single crystals on microstructured plasma polymer coatings.

Single crystals of the metal-organic framework Ulm-4l(arge) (MFU-4l) can be grown site selectively on microtextured plasma polymer coatings comprising a pattern of alternating hydrophilic and hydrophobic domains. The crystals grow preferentially on the hydrophilic parts of the film surface. X-ray diffraction (XRD) shows that the cubic crystals have a high propensity to adhere with 〈1 0 0〉 orien...

Growth and characterizations of Ba2Ti2Fe2As4O single crystals

Single crystals of a new iron-based superconductor Ba2Ti2Fe2As4O have been grown successfully via a Ba2As3-flux method in a sealed evacuated quartz tube. Bulk superconductivity with Tc ∼ 21.5 K was demonstrated in resistivity and magnetic susceptibility measurements after the as-grown crystals were annealed at 500 °C in vacuum for a week. X-ray diffraction patterns confirm that the annealed and...