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A DNA origami plasmonic sensor with environment-independent read-out

Nano Research 2019年第11期12卷 2900-2907页

作者： Valentina Masciotti Luca Piantanida denys naumenko Heinz Amenitsch Mattia Fanetti Matjaz Valant Dongsheng Lei Gang Ren Marco Lazzarino CNR-IOM AREA Science ParkBasovizza TriesteI-34149Italy PhD Course in Nanotechnology University of TriesteTriesteI-34127Italy Institute for Physics of Semiconductors National Academy of Sciences of UkraineKyiv03028Ukraine Institute of Inorganic Chemistry Graz University of TechnologyGrazA-8010Austria Materials Research Laboratory University of Nova GoricaNova GoricaSI-5000Slovenia Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu610054China The Molecular Foundry Lawrence Berkeley National LaboratoryBerkeleyCA94720USA School of Physical Science and Technology Electron Microscopy Center of LZULanzhou UniversityLanzhou730000China Micron School of Materials Science&Engineering Boise State UniversityBoiseID 83725USA

DNA origami is a promising technology for its reproducibility,flexibility,scalability and *** the several potential applications,DNA origami has been proposed as a tool for drug delivery and as a contrast agent,since a conformational change upon specific target interaction may be used to release a drug or produce a physical signal,***,its conformation should be robust with respect to the properties of the medium in which either the recognition or the read-out take place,such as pressure,viscosity and any other unspecific interaction other than the desired target *** we report on the read-out robustness of a tetragonal DNA-origami/gold-nanoparticle hybrid structure able to change its configuration,which is transduced in a change of its plasmonic properties,upon interaction with a specific DNA *** investigated its response when analyzed in three different media:aqueous solution,solid support and viscous *** show that,once a conformational variation is produced,it remains unaffected by the subsequent physical interactions with the environment.

关键词： DNA origami plasmonic sensor molecular detection gold nanoparticle

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