Roles of anionic and cationic template components in biomineralization of CdS nanorods using self-assembled DNA-membrane complexes.
Complexes of anionic DNA and cationic liposomes self-assemble into a multilamellar structure where two-dimensional lipid sheets confine a periodic one-dimensional lattice of parallel DNA chains, between which Cd(2+) ions can condense, and be subsequently reacted with H(2)S to form CdS nanorods. In this work, we identify the synergistic roles of the anionic and cationic components within the DNA-membrane template; DNA is highly anionic and condenses the Cd(2+) ions, while the cationic membrane modulates the concentration of condensed Cd(2+) ions to control the final CdS nanorod dimensions. Due to the strong electrostatic interactions between the DNA sugar-phosphate backbone and the Cd(2+) ions, crystallographic control of CdS nanostructures is possible using these simple DNA-membrane templates, which we demonstrate using nanobeam electron diffraction experiments on individual templated CdS nanorods.
Liang
Hongjun
H
Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Angelini
Thomas E
TE
Braun
Paul V
PV
Wong
Gerard C L
GC
D000818:Animals; D000838:Anions; D010582:Bacteriophage lambda / Q000737:chemistry / Q000235:genetics; D019187:Cadmium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D002412:Cations; D002417:Cattle; D003460:Crystallization; D004247:DNA / Q000737:chemistry*; D004279:DNA, Viral / Q000737:chemistry; D005229:Fatty Acids, Monounsaturated / Q000737:chemistry; D008055:Lipids / Q000737:chemistry*; D008081:Liposomes / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D010713:Phosphatidylcholines / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013440:Sulfides / Q000138:chemical synthesis / Q000737:chemistry*
D000838:Anions; D019187:Cadmium Compounds; D002412:Cations; D004279:DNA, Viral; D005229:Fatty Acids, Monounsaturated; D008055:Lipids; D008081:Liposomes; D010713:Phosphatidylcholines; D000644:Quaternary Ammonium Compounds; D013440:Sulfides; C034939:cadmium sulfide; D004247:DNA; C427203:calf thymus DNA; C017251:1,2-oleoylphosphatidylcholine; C070046:1,2-dioleoyloxy-3-(trimethylammonium)propane