Home  About us  Contact
 

Hexagonal Network (hexagonal + network)

Distribution by Scientific Domains
Polymers and Materials Science60%

Selected Abstracts

Hexagonal Network Organization of Dye-Loaded Zeolite,L Crystals by Surface-Tension Driven Autoassembly,

ADVANCED FUNCTIONAL MATERIALS, Issue 17 2006
S. Yunus
Abstract Highly fluorescent dye-loaded zeolite,L crystals, approximately 1.4,,m long and 650,nm in diameter, are organized in a hexagonal network by a surface-tension-driven autoassembly process. A polydimethylsiloxane (PDMS) film presenting a trigonal ordering of spherical protuberances, including a polystyrene (PS) hexagonal network occupying their interstices, is chosen as the platform for the assembly. The overall wettability and the difference in surface tension between PDMS and PS surfaces are found to offer good conditions for ordering micrometric dye-loaded zeolite,L crystals in a 2D hexagonal network. The resulting film displays a regular hexagonal pattern of polarized fluorescence, reflecting the polarization properties of the dye molecules inserted in the parallel nanochannels of the zeolites. [source]

Zoospore-specific antigen as a useful marker for molecular analysis of net formation in Hydrodictyon reticulatum (Chlorococcales, Chlorophyceae)

PHYCOLOGICAL RESEARCH, Issue 3 2000
Kyoko Hatano
SUMMARY In the green alga Hydrodictyon reticulatum zoospores are arranged in a regular fashion to form an intricate hexagonal network during the asexual reproductive cycle. A monoclonal antibody which was raised against a homogenate of zoospores recognized a single poly-peptide in zoospores with a molecular mass of 31 kDa. The antigenic polypeptide, which was designated Amy1, was localized within the cytoplasm of zoospores. The accumulation of Amy1 occurred concomitantly with the transition from multinuclear vegetative cells to mononuclear zoospores, and the degradation of Amy1 occurred concomitantly with the further development of zoospores. Amy1 was constantly expressed during the period of mononuclear zoospores. Thus, we conclude that Amy1 is a zoospore-specific polypeptide. Using the anti-Amy1 monoclonal antibody, we could easily distinguish between mononuclear zoospores and multinuclear vegetative net-cells. This provides an important tool for analysing the molecular mechanisms involved in the hexagonal net formation by zoospores. [source]

Epitaxial growth of aligned GaN nanowires and nanobridges

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 6 2007
Kyungkon Kim
Abstract Homo-epitaxialy grown aligned GaN nanowires were prepared on crystalline GaN mesas. The GaN nanowires showed preferential growth along the ,100, direction (m -axis direction). By using selectively positioned and crystallographically well defined GaN epitaxial lateral overgrowth (ELO) mesas as substrate, we obtained horizontally aligned GaN nanowires, in comb-like arrays and hexagonal network interconnecting the ELO mesas. Preliminary testing of the nanomechanical behavior of horizontal nanowires is reported. Combination of ELO with nanowire synthesis is expected to provide a new paradigm for nano-electronic and electromechanical devices. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Colloidal Networks: Polymorphic Meniscus Convergence for Construction of Quasi-Periodic Assemblies and Networks of Colloidal Nanoparticles (Adv. Mater.

ADVANCED MATERIALS, Issue 37 2010
37/2010)
Quasi-periodic colloidal networks can be constructed on the basis of polymorphic meniscus convergence (MC) in an air-cavity-embedded, nanocolloidal system, report Sin-Doo Lee and coworkers on p. 4172. Depending on the flow associated with the air-cavities, the colloidal particles are self-organized into nanowires through binary MC, hexagonal networks with Y-junctions through ternary MC and square networks with X-junctions through quaternary MC, reflecting the flow symmetry according to the air-cavity deformation. [source]