Controlled self-assembly of organic nanowires and platelets using dipolar and hydrogen-bonding interactions.
Synergistic dipole-dipole and hydrogen-bonding interactions are used to assemble nanostructured materials. Precipitation of a hydrogen-bonding donor-acceptor molecule 8-[[p-[bis(ethyl)amino]phenyl]azo]-isobutylflavin (ABFL) yields nanowires approximately 50-150 nm in diameter and lengths of several millimeters. Precipitation of the non-hydrogen-bonding analog, methylated ABFL (MABFL), generates micrometer-sized hexagonal platelets that are 5-10 microm in length, 1-5 microm in width, and 0.1-0.5 microm thick. The structural similarity of the two molecules allows intermediate morphologies to be formed via co-precipitation. Doping experiments demonstrate efficient control over nanowire length and diameter due to the disruption of the hydrogen bonding within the nanowires.
Jordan
Brian J
BJ
Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, USA.
Ofir
Yuval
Y
Patra
Debabrata
D
Caldwell
Stuart T
ST
Kennedy
Andrew
A
Joubanian
Steven
S
Rabani
Gouher
G
Cooke
Graeme
G
Rotello
Vincent M
VM
D006860:Hydrogen Bonding; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D013499:Surface Properties