Cyclodextrin-Based Self-Assembled Nanotubes at the Water/Air Interface

Native α-cyclodextrin (α-CD) is found to spontaneously form films at aqueous solution/air interfaces. Shape-response measurements to volume perturbations on drops hanging from a capillary indicate that temperature and sodium dodecyl sulfate (SDS) concentration strongly modify the viscoelastic proper...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2007-11, Vol.111 (44), p.12625-12630
Main Authors: Hernández-Pascacio, Jorge, Garza, Cristina, Banquy, Xavier, Díaz-Vergara, Norma, Amigo, Alfredo, Ramos, Salvador, Castillo, Rolando, Costas, Miguel, Piñeiro, Ángel
Format: Article
Language:English
Subjects:
Air
Cyclodextrins - chemistry
Models, Molecular
Nanotubes - chemistry
Sodium Dodecyl Sulfate - chemistry
Solutions - chemistry
Surface Properties
Temperature
Time Factors
Water - chemistry
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Summary:Native α-cyclodextrin (α-CD) is found to spontaneously form films at aqueous solution/air interfaces. Shape-response measurements to volume perturbations on drops hanging from a capillary indicate that temperature and sodium dodecyl sulfate (SDS) concentration strongly modify the viscoelastic properties of such films. By using isothermal titration calorimetry (ITC), Brewster angle microscopy (BAM), atomic force microscopy (AFM), and molecular dynamics (MD) simulations, it is shown that the films consist of self-assembled nanotubes whose building blocks are cyclodextrin dimers (α-CD2) and α-CD2−SDS1 complexes.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp076576t