Plasmon-Assisted Delivery of Single Nano-Objects in an Optical Hot Spot

Fully exploiting the capability of nano-optics to enhance light-matter interaction on the nanoscale is conditioned by bringing the nano-object to interrogate within the minuscule volume where the field is concentrated. There currently exists several approaches to control the immobilization of nano-o...

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Bibliographic Details
Published in:Nano letters 2013-09, Vol.13 (9), p.4299-4304
Main Authors: Galloway, Christopher M, Kreuzer, Mark P, Aćimović, Srdjan S, Volpe, Giorgio, Correia, Manuel, Petersen, Steffen B, Neves-Petersen, Maria Teresa, Quidant, Romain
Format: Article
Language:English
Subjects:
Binding
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
General equipment and techniques
Hot spots
Immobilization
Infrared absorption
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties
Materials science
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Physics
Plasmonics
Proteins
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Spectroscopy
Surface and interface electron states
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Description
Summary:Fully exploiting the capability of nano-optics to enhance light-matter interaction on the nanoscale is conditioned by bringing the nano-object to interrogate within the minuscule volume where the field is concentrated. There currently exists several approaches to control the immobilization of nano-objects but they all involve a cumbersome delivery step and require prior knowledge of the “hot spot” location. − Herein, we present a novel technique in which the enhanced local field in the hot spot is the driving mechanism that triggers the binding of proteins via three-photon absorption. This way, we demonstrate exclusive immobilization of nanoscale amounts of bovine serum albumin molecules into the nanometer-sized gap of plasmonic dimers. The immobilized proteins can then act as a scaffold to subsequently attach an additional nanoscale object such as a molecule or a nanocrystal. This universal technique is envisioned to benefit a wide range of nano-optical functionalities including biosensing, − enhanced spectroscopy like surface-enhanced Raman spectroscopy , or surface-enhanced infrared absorption spectroscopy, as well as quantum optics. ,,
ISSN:1530-6984
1530-6992
DOI:10.1021/nl402071p