| 초록 |
A new class of nanotubes were fabricated via cascade self-assembly of dendrons and cyclodextrins. The amide dndrons with focal pyrene unit self-organize into vesicles in aqueous phase. The in-situ inclusion of the focal pyrene into the cavity of β- or γ-cyclodextrin (CD) induces self-assembled organic nanotubes with an average outer diameter of about 45 nm and inner diameter of 22 nm. The surface of the nanotube is covered with CD. Therefore, the surface functionality of the nanotube is controlled simply by modifying the functionality of CD. The removal of CD from the nanotube by using poly(propylene glycol) reversibly generates vesicles. This work provides an efficient methodology not only to create a new class of CD-covered organic nanotubes but also to exhibit reversible transformation of nanotubes and vesicles triggered by the motifs of dendron self-assembly, CD-inclusion, and pseudorotaxane formation. In addition, these nanotubes were utilized as an efficient template for the assemly of Au nanoparticles to provide hybrid nano-array with unique biosensory functions. |
