BaCO3 mesocrystals: new morphologies using peptide-polymer conjugates as crystallization modifiers.
Nanocrystal superstructures of barium carbonate (BaCO(3)) which exhibit unusual morphologies are obtained by the carbon dioxide vapor diffusion technique in the presence of poly(ethylene oxide)-block-eicosa aspartate (PEO-b-Asp(20)). The highly effective bioconjugate acts as a crystal growth modifier over a broad range of concentrations. Instead of commonly observed branched needles, the morphology can be systematically varied along different twinned growth patterns towards well-defined branched dumbbells. Detailed analysis of the crystal substructures with high resolution scanning electron microscopy (HRSEM) and dynamic light scattering (DLS) discloses a potential growth mechanism of the superstructures and reveals the role of the polymeric bioconjugate therein.
Wang
Tongxin
T
Max-Planck-Institute of Colloids and Interfaces, Department of Colloid Chemistry, Research Campus Golm, D-14424 Potsdam, Germany.
Mitchell
James
J
Börner
Hans
H
Cölfen
Helmut
H
Antonietti
Markus
M
D001224:Aspartic Acid / Q000737:chemistry*; D001464:Barium / Q000737:chemistry*; D002254:Carbonates / Q000737:chemistry*; D003460:Crystallization / Q000379:methods; D008823:Micelles; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods; D010455:Peptides / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*
D002254:Carbonates; D008823:Micelles; D010455:Peptides; D001464:Barium; D001224:Aspartic Acid; D011092:Polyethylene Glycols; C006685:barium carbonate