Direct joining of a heterogeneous pair of supramolecular nanotubes and reaction control of a guest compound by transportation in the nanochannels
Four novel amino-acid lipids were synthesized and then self-assembled in water to produce four different types of supramolecular nanotubes. The nanotubes consisted of a single monolayer of amino-acid lipids packed in parallel and had similar inner diameters and membrane wall thicknesses but dissimilarly charged surfaces. Mixing of nanotubes that had cationic exterior surfaces with nanotubes that had anionic exterior surfaces resulted in aggregation of the nanotubes. In contrast, mixing of nanotubes with cationic interior surfaces and nanotubes with anionic interior surfaces resulted in end-to-end joining of the two types of nanotubes via electrostatic attractions at the open ends to form heterogeneous nanotubes. Time-lapse fluorescence microscopy confirmed that a fluorophore could be transported through the heterogeneous nanotubes, which had alternating acidic and basic nanochannel segments. In addition, acidbase reactions of the fluorophore could be precisely controlled during transport. This nanotube-joining technique should be useful not only for the construction of multifunctional hybrid nanotubes but also for the production of nanoreactors for chemical/biological reactions and nano-devices for analysis and separation.
Kameta, Naohiro,Ding, Wuxiao
supporting information
p. 1053 - 1059
(2019/07/19)
Epoxysuccinamide derivative or salt thereof, and medicine comprising the same
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(2008/06/13)
Studies on analgesic oligopeptides. V. Structure-activity relationship of tripeptide alkylamides, Tyr-D-Arg-Phe-X
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Suzuki,Fujita,Sasaki,Shiratori,Sakurada,Kisara
p. 4834 - 4840
(2007/10/02)
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