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The susceptibility of self-assembled materials to changes in environmental conditions and mechanical forces often limits their utility for many applications. In this work, the surface of nanofibers formed by β -sheet peptide self-assembly were coated by polydopamine (PDA) deposition. This conformal coating process rendered the nanofiber dimensions and internal p -stacking chirality impervious to changes in pH, temperature and physical processing by spin-coating onto a silicon wafer. Whereas, sonication-induced shearing of the DA/NDI-KK composite irreversibly shortened the nanofibers into 100-200 nm segments, the uncoated nanofibers unravelled into single strands upon similar treatment. Additionally, the PDA coated nanofibers could be wrapped by an additional layer comprised of a positively, charged polyelectrolyte polymer.
This article was published in the following journal.
Name: Chemistry (Weinheim an der Bergstrasse, Germany)
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CONFORMAL RADIOTHERAPY that combines several intensity-modulated beams to provide improved dose homogeneity and highly conformal dose distributions.
DNA analogs containing neutral amide backbone linkages composed of aminoethyl glycine units instead of the usual phosphodiester linkage of deoxyribose groups. Peptide nucleic acids have high biological stability and higher affinity for complementary DNA or RNA sequences than analogous DNA oligomers.
Specialized regions of the cell membrane composed of pits coated with a bristle covering made of the protein CLATHRIN. These pits are the entry route for macromolecules bound by cell surface receptors. The pits are then internalized into the cytoplasm to form the COATED VESICLES.
The external, nonvascular layer of the skin. It is made up, from within outward, of five layers of EPITHELIUM: (1) basal layer (stratum basale epidermidis); (2) spinous layer (stratum spinosum epidermidis); (3) granular layer (stratum granulosum epidermidis); (4) clear layer (stratum lucidum epidermidis); and (5) horny layer (stratum corneum epidermidis).
TRANSPORT VESICLES formed when cell-membrane coated pits (COATED PITS, CELL-MEMBRANE) invaginate and pinch off. The outer surface of these vesicles is covered with a lattice-like network of COP (coat protein complex) proteins, either COPI or COPII. COPI coated vesicles transport backwards from the cisternae of the GOLGI APPARATUS to the rough endoplasmic reticulum (ENDOPLASMIC RETICULUM, ROUGH), while COPII coated vesicles transport forward from the rough endoplasmic reticulum to the Golgi apparatus.