Document Detail

Autonomous Movement of Controllable Assembled Janus Capsule Motors.
MedLine Citation:
PMID:  23153409     Owner:  NLM     Status:  Publisher    
We demonstrate the first example of a self-propelled Janus polyelectrolyte multilayer hollow capsule that can serve as both autonomous motor and smart cargo. This new autonomous Janus capsule motor composing of partially coated dendritic platinum nanoparticles (Pt NPs) was fabricated by using a template-assisted layer-by-layer (LbL) self assembly combined with micro-contact printing method. The resulting Janus capsule motors still retain outstanding delivery capacities and can respond to external stimuli for controllable encapsulation and triggered release of model drugs. The Pt NPs on the one side of Janus capsule motors catalytically decompose of hydrogen peroxide fuel, generating oxygen bubbles and then recoiling the movement of capsule motors in solution or at interface. They could autonomously move at a maximum speed of above 1 mm/s (over 125 body lengths/s), while exerting large forces exceeding 75 pN. Also, these asymmetric hollow capsules can be controlled by external magnetic field to achieve directed movement. This LbL-assembled Janus capsule motor system is potential in making smart self-propelling delivery systems.
Yingjie Wu; Zhiguang Wu; Xiankun Lin; Qiang He; Junbai Li
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-15
Journal Detail:
Title:  ACS nano     Volume:  -     ISSN:  1936-086X     ISO Abbreviation:  ACS Nano     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101313589     Medline TA:  ACS Nano     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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