title: Synthesis of silyl-terminated polylactides for controlled surface immobilization of polylactide macromolecular chains.
abstract: Poly(D-lactide)s (PDLA) having an end group of trimethoxysilyl (P(x)-Si-(OMe)(3)) or monoethoxydimethylsilyl (P(x)-Si-OEt) group were synthesized to immobilize macromolecular chains of polylactide onto a flat silicon surface by the "grafting onto" mechanism. Both the end-functional PDLAs were efficiently immobilized on the flat surface of silicon wafers to create different nano-ordered structures. The P(x)-Si-OEt having the monofunctional siloxyl group formed a homogeneous dot morphology consisting of homogeneously dispersed particles of 20-30 nm in diameter while the P(x)-Si-(OMe)(3) having the trifunctional siloxyl group formed a heterogeneous morphology consisting of both spots and fibrous strands. The former homogeneous morphology was attributed to the lack of the intermolecular cross-linking reaction that was evident in P(x)-Si-(OMe)(3).
authors.affiliation: Department of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Nakajima
authors.forename: Tomoko
authors.initials: T
authors.lastname: Fujiwara
authors.forename: Chan Woo
authors.initials: CW
authors.lastname: Lee
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Kimura
mesh_terms: D018625:Microscopy, Atomic Force; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D011091:Polyesters / Q000138:chemical synthesis* / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D012825:Silicon / Q000737:chemistry; D012833:Siloxanes / Q000138:chemical synthesis* / Q000737:chemistry; D013499:Surface Properties; D044366:Transition Temperature
chemical_list: D011091:Polyesters; D012821:Silanes; D012833:Siloxanes; C033616:poly(lactide); D012825:Silicon