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          Institute: MPI für Biochemie     Collection: Independent Research Groups     Display Documents



ID: 39331.0, MPI für Biochemie / Independent Research Groups
Single-molecule optomechanical cycle
Authors:Hugel, T.; Holland, N. B.; Cattani, A.; Moroder, L.; Seitz, M.; Gaub, H. E.
Language:English
Date of Publication (YYYY-MM-DD):2002-05-10
Title of Journal:Science
Journal Abbrev.:Science
Volume:296
Issue / Number:5570
Start Page:1103
End Page:1106
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:Light-powered molecular machines are conjectured to be essential constituents of future nanoscale devices. As a model for such systems, we have synthesized a polymer of bistable photosensitive azobenzenes. Individual polymers were investigated by single-molecule force spectroscopy in combination with optical excitation in total internal reflection. We were able to optically lengthen and contract individual polymers by switching the azo groups between their trans and cis configurations. The polymer was found to contract against an external force acting along the polymer backbone, thus delivering mechanical work. As a proof of principle, the polymer was operated in a periodic mode, demonstrating for the first time optomechanical energy conversion in a single- molecule device.
Comment of the Author/Creator:Date: 2002, MAY 10
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Biochemie/Independent Research Groups/Bioorganic Chemistry (L. Moroder)
External Affiliations:Univ Munich, Lehrstuhl Angew Phys, Amalienstr 54, D-80799; Munich, Germany; Univ Munich, Lehrstuhl Angew Phys, D-80799 Munich, Germany; Univ Munich, Ctr Nanosci, D-80799 Munich, Germany
Identifiers:ISI:000175565000048 [ID No:1]
ISSN:0036-8075 [ID No:2]
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