Journal ArticleDOI
Nanoscale chemical mapping using three-dimensional adiabatic compression of surface plasmon polaritons.
Francesco De Angelis,Gobind Das,Patrizio Candeloro,Maddalena Patrini,Matteo Galli,Alpan Bek,Marco Lazzarino,Ivan S. Maksymov,Carlo Liberale,Lucio Claudio Andreani,Enzo Di Fabrizio +10 more
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TLDR
The design, fabrication and application of a photonic-plasmonic device that is fully compatible with atomic force microscopy and Raman spectroscopy, and topographic, chemical and structural information about silicon nanocrystals may be obtained with a spatial resolution of 7 nm.Abstract:
The fields of plasmonics, Raman spectroscopy and atomic force microscopy have recently undergone considerable development, but independently of one another. By combining these techniques, a range of complementary information could be simultaneously obtained at a single molecule level. Here, we report the design, fabrication and application of a photonic–plasmonic device that is fully compatible with atomic force microscopy and Raman spectroscopy. Our approach relies on the generation and localization of surface plasmon polaritons by means of adiabatic compression through a metallic tapered waveguide to create strongly enhanced Raman excitation in a region just a few nanometres across. The tapered waveguide can also be used as an atomic force microscope tip. Using the device, topographic, chemical and structural information about silicon nanocrystals may be obtained with a spatial resolution of 7 nm.read more
Citations
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Nanoplasmonics: past, present, and glimpse into future
TL;DR: Fundamental theoretical ideas in nanoplasmonics are reviewed and selected experimental developments are reviewed, including fundamentals, nanolocalization of optical energy and hot spots, ultrafast nanoplAsmonics and control of the spatiotemporal Nanolocalized fields.
Journal ArticleDOI
Silver Nanoparticles: Synthesis and Application for Nanomedicine
Sang Hun Lee,Bong-Hyun Jun +1 more
TL;DR: This review aimed to present major routes of synthesis of AgNPs, including physical, chemical, and biological synthesis processes, along with discrete physiochemical characteristics of AgNs, and discuss the underlying intricate molecular mechanisms behind their plasmonic properties on mono/bimetallic structures, potential cellular/microbial cytotoxicity, and optoelectronic property.
Journal ArticleDOI
Breaking the diffusion limit with super-hydrophobic delivery of molecules to plasmonic nanofocusing SERS structures
F. De Angelis,Francesco Gentile,Federico Mecarini,Gobind Das,Manola Moretti,Patrizio Candeloro,Maria Laura Coluccio,Gheorghe Cojoc,Angelo Accardo,Carlo Liberale,Remo Proietti Zaccaria,Gerardo Perozziello,Luca Tirinato,Andrea Toma,Giovanni Cuda,Roberto Cingolani,E. Di Fabrizio +16 more
TL;DR: In this paper, super-hydrophobic artificial surfaces and evaporation are used to direct molecules to plasmonic light-focusing structures, which can be localized and detected even at attomolar concentrations.
Journal ArticleDOI
Engineering metallic nanostructures for plasmonics and nanophotonics
TL;DR: This review focuses on top-down nanofabrication techniques for engineering metallic nanostructures, along with computational and experimental characterization techniques, for a variety of current and emerging applications.
Journal ArticleDOI
A Review on Surface-Enhanced Raman Scattering.
Roberto Pilot,Raffaella Signorini,Christian Durante,Laura Orian,Manjari Bhamidipati,Laura Fabris +5 more
TL;DR: An overview of the most significant aspects of surface-enhanced Raman scattering, and a representative selection of applications in the biomedical field, with direct and indirect protocols is provided.
References
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Surface plasmon subwavelength optics
TL;DR: By altering the structure of a metal's surface, the properties of surface plasmons—in particular their interaction with light—can be tailored, which could lead to miniaturized photonic circuits with length scales that are much smaller than those currently achieved.
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Biosensing with plasmonic nanosensors
TL;DR: This paper introduces the localized surface plasmon resonance (LSPR) sensor and describes how its exquisite sensitivity to size, shape and environment can be harnessed to detect molecular binding events and changes in molecular conformation.
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A hybridization model for the plasmon response of complex nanostructures.
TL;DR: A simple and intuitive picture that describes the plasmon response of complex nanostructures of arbitrary shape is presented, an electromagnetic analog of molecular orbital theory, that can be understood as the interaction or "hybridization" of elementary plasmons supported by nanostructure of elementary geometries.
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The one phonon Raman spectrum in microcrystalline silicon
H. Richter,Z. P. Wang,Lothar Ley +2 more
TL;DR: In this paper, a relaxation in the q-vector selection rule for the excitation of the Raman active optical phonons was proposed to increase the red shift and broadening of the signal from microcrystalline silicon films.
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Nanoscale chemical analysis by tip-enhanced Raman spectroscopy
TL;DR: In this article, a fine metal tip brought to within a few nanometers of a molecular film was found to give strong enhancement of Raman scattered light from the sample, which can be used for molecular analysis with excellent spatial resolution.