Patterned by polymers

Honeycomb-patterned photoluminescent films fabricated by self-assembly of hyperbranched polymers.

Patterned by adhesion

Patterned by adhesion laborate tissue patterns are formed by two cell types with complementary adhesion molecules, as revealed by Sujin Bao and Ross Cagan (Washington University, St. Louis, MO). Favored heterophilic attractions between the two adhesion molecules, they show, pattern the fly eye. Patterning has often taken a back seat to fate determination in cell biology studies. “We’ve spent bu...

Organ sculpting by patterned extracellular matrix stiffness

How organ-shaping mechanical imbalances are generated is a central question of morphogenesis, with existing paradigms focusing on asymmetric force generation within cells. We show here that organs can be sculpted instead by patterning anisotropic resistance within their extracellular matrix (ECM). Using direct biophysical measurements of elongating Drosophila egg chambers, we document robust me...

Tremor entrainment by patterned low-frequency stimulation.

High-frequency test stimulation for tremor suppression is a standard procedure for functional target localization during deep brain stimulation. This method does not work in cases where tremor vanishes intraoperatively, for example, due to general anaesthesia or due to an insertional effect. To overcome this difficulty, we developed a stimulation technique that effectively evokes tremor in a we...

Precrystallization of fluids induced by patterned substrates

It is shown that a fluid near a topographically patterned wall exhibits crystallization below the bulk freezing point (so-called precrystallization). In detail, a periodic array of fixed hard spheres is considered as a wall pattern. The actual type of the pattern corresponds to a face-centred-cubic (fcc) lattice cut along the (111), (100) or (110) orientation, a hexagonal-close-packed (hcp) sol...