Formation of nonextinct ring-banded textures and multistacked lamella of tetra-aniline-block-poly(L-lactide) rod-coil diblock oligomer films induced by solvent vapor treatment.
The self-assembly processes of the rod-coil diblock oligomer thin film of tetra-aniline (TANI)-block-poly(L-lactide) (PLLA) with different film thicknesses induced in the coil-selective solvent of acetone vapor at room temperature were studied. The morphologies of the oligomer films were determined by the film thickness. For the thicker film (232 nm), the nonextinct concentric ring-banded textures could form. While for the thinner and appropriate film (about 6 nm), multistacked diamond-shaped appearances with the periodic thickness being about 8.5 nm(6-nm-thick extended PLLA chain and 2.5-nm-thick p-pi conjugating TANI bimolecular layer) formed. The possible formation models of those two regular morphologies were presented in detail.
Luo
Chunxia
C
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences and Graduate School of the Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China.
Huang
Weihuan
W
Wang
Hanfu
H
Han
Yanchun
Y
D000096:Acetone / Q000737:chemistry*; D000814:Aniline Compounds / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D011091:Polyesters / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013696:Temperature; D014835:Volatilization
D000814:Aniline Compounds; D001672:Biocompatible Materials; D011091:Polyesters; D012997:Solvents; D000096:Acetone; C033616:poly(lactide); C023650:aniline