Nano-donuts from pH-dependent block restructuring in amphiphilic ABA triblock copolymer vesicles at the air-water interface

Jin Young Park, Ming Liu, Jimmy Mays, Mark Dadmun, Rigoberto Advincula*

*この研究の対応する著者

研究成果: Article査読

16 被引用数 (Scopus)

抄録

To understand the nature of polymers capable of forming multiply bound polymer chains (MBPCs) on surfaces, the Langmuir-Blodgett (LB) technique and Scanning Probe Microscopy (SPM) have been utilized to investigate surface morphology of the amphiphilic triblock copolymer (P2VP-b-dPS-b-P2VP, M n = 125,000, dPS:P2VP = 1:1) at the air-water interface. The LB monolayer studies were carried out via π-A isotherms, compression-expansion cycles, kinetic stability, and nanoscopic surface morphological behavior. A strong pH effect was observed on the surface limiting area, stability, and morphology forming various 2-D aggregates. In particular, well-ordered interesting nanostructures (nano-donut formation) of the triblock copolymer aggregates depend on the effect of pH on the hydrophilic P2VP blocks, acting as a "cushion" at the air-water interface. In addition, equilibrium factors between the adsorption of the hydrophilic outer blocks (related to its solubility) and the entanglement of the hydrophobic dPS blocks during the evaporation of the spreading solution may play a critical role.

本文言語English
ページ(範囲)747-749
ページ数3
ジャーナルSoft Matter
5
4
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学

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