Reference : Two-state switchable plasmonic tweezers for dynamic manipulation of nano-objects
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/42873
Two-state switchable plasmonic tweezers for dynamic manipulation of nano-objects
English
Messina, Gabriele [Italian Insititute of Technology]
Zambrana-Puyalto, Xavier [Italian Insititute of Technology]
Maccaferri, Nicolò mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Garoli, Denis [Italian Insititute of Technology]
De Angelis, Francesco [Italian Insititute of Technology]
2020
Nanoscale
Royal Society of Chemistry
12
8574-8581
Yes (verified by ORBilu)
International
2040-3364
2040-3372
Cambridge
United Kingdom
[en] In this work, we present a plasmonic platform capable of trapping nano-objects in two different spatial configurations. The switch between the two trapping states, localized on the tip and on the outer wall of a vertical gold nanochannel, can be activated by varying the focusing position of the excitation laser along the main axis of the nanotube. We show that the switching of the trapping site is induced by changes in the distribution of the electromagnetic field and of the trapping force. The “inner” and “outer” trapping states are characterized by a static and a dynamic behavior respectively, and their stiffness is measured by analyzing the positions of the trapped specimens as a function of time. In addition, we demonstrate that the stiffness of the static state is high enough to trap particles with diameter as small as 40 nm. These results show a simple, controllable way to generate a switchable two-state trapping regime, which could be used as a model for the study of dynamic trapping or as a mechanism for the development of nanofluidic devices.
http://hdl.handle.net/10993/42873
10.1039/D0NR00721H
H2020 ; 687089 - PROSEQO - PROtein SEQuencing using Optical single molecule real-time detection

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