Chemically synthesized noble metal nanostructures for plasmonics

2015 ◽  
Vol 4 (3) ◽  
Author(s):  
Hongyan Liang ◽  
Hong Wei ◽  
Deng Pan ◽  
Hongxing Xu
Keyword(s):  
Noble Metal ◽  
Information Technologies ◽  
Surface Enhanced Raman Spectroscopy ◽  
Metal Nanostructures ◽  
Plasmonic Nanostructures ◽  
Practical Applications ◽  
Nanophotonic Devices ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Noble Metal Nanostructures

AbstractNoble metal nanostructures have drawn attentions of researchers in many fields due to their particular optical properties. Controlling the metal nanostructures’ size, shape, material, assembly, and surrounding environment can tune their unique plasmonic features that are important for practical applications. In this review, we firstly discuss some novel metal nanostructures synthesized through wet chemical methods and their fundamental plasmonic properties. Then, some applications of these chemically synthesized nanostructures in plasmonics are highlighted, including surface-enhanced Raman spectroscopy, plasmonic sensing, optical nanoantennas, and plasmonic circuitry. Plasmonic nanostructures provide the ways to manipulate light at the nanometer scale and open the prospects of developing nanophotonic devices for sensing and information technologies.

scholarly journals Noble Metal Nanostructures Influence of Structure and Environment on Their Optical Properties

2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
Ondřej Kvítek ◽  
Jakub Siegel ◽  
Vladimír Hnatowicz ◽  
Václav Švorčík
Keyword(s):  
Optical Properties ◽  
Surface Plasmons ◽  
Noble Metal ◽  
Plasmon Resonance ◽  
Large Scale ◽  
Surface Enhanced Raman Spectroscopy ◽  
Metal Nanostructures ◽  
Label Free ◽  
Surface Enhanced Raman ◽  
Noble Metal Nanostructures

Optical properties of nanostructured materials, isolated nanoparticles, and structures composed of both metals and semiconductors are broadly discussed. Fundamentals of the origin of surface plasmons as well as the surface plasmon resonance sensing are described and documented on a number of examples. Localized plasmon sensing and surface-enhanced Raman spectroscopy are subjected to special interest since those techniques are inherently associated with the direct application of plasmonic structures. The possibility of tailoring the optical properties of ultra-thin metal layers via controlling their shape and morphology by postdeposition annealing is documented. Special attention is paid to the contribution of bimetallic particles and layers as well as metal structures encapsulated in semiconductors and dielectrics to the optical response. The opportunity to tune the properties of materials over a large scale of values opens up entirely new application possibilities of optical active structures. The nature of surface plasmons predetermines noble metal nanostructures to be promising great materials for development of modern label-free sensing methods based on plasmon resonance—SPR and LSPR sensing.

Polymer-based microfluidics with surface-enhanced Raman-spectroscopy-active periodic metal nanostructures for biofluid analysis

2008 ◽  
Vol 13 (5) ◽  
pp. 054026 ◽  
Author(s):  
Kiang Wei Kho ◽  
Kristin Zhu Mei Qing ◽  
Ze Xiang Shen ◽  
Iman Binte Ahmad ◽  
Samanta Sing Chin Lim ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Metal Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

scholarly journals Surface-Enhanced Raman Sensing of Semi-Volatile Organic Compounds by Plasmonic Nanostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2619
Author(s):  
Nguyễn Hoàng Ly ◽  
Sang Jun Son ◽  
Soonmin Jang ◽  
Cheolmin Lee ◽  
Jung Il Lee ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Optical Sensors ◽  
Metal Nanostructures ◽  
Raman Signal ◽  
Plasmonic Nanostructures ◽  
Analytical Technique ◽  
Surface Enhanced ◽  
Volatile Organic ◽  
Surface Enhanced Raman

Facile detection of indoor semi-volatile organic compounds (SVOCs) is a critical issue to raise an increasing concern to current researchers, since their emissions have impacted the health of humans, who spend much of their time indoors after the recent incessant COVID-19 pandemic outbreaks. Plasmonic nanomaterial platforms can utilize an electromagnetic field to induce significant Raman signal enhancements of vibrational spectra of pollutant molecules from localized hotspots. Surface-enhanced Raman scattering (SERS) sensing based on functional plasmonic nanostructures has currently emerged as a powerful analytical technique, which is widely adopted for the ultra-sensitive detection of SVOC molecules, including phthalates and polycyclic aromatic hydrocarbons (PAHs) from household chemicals in indoor environments. This concise topical review gives updated recent developments and trends in optical sensors of surface plasmon resonance (SPR) and SERS for effective sensing of SVOCs by functionalization of noble metal nanostructures. Specific features of plasmonic nanomaterials utilized in sensors are evaluated comparatively, including their various sizes and shapes. Novel aptasensors-assisted SERS technology and its potential application are also introduced for selective sensing. The current challenges and perspectives on SERS-based optical sensors using plasmonic nanomaterial platforms and aptasensors are discussed for applying indoor SVOC detection.

scholarly journals A simple and reliable approach for the fabrication of nanoporous silver patterns for surface-enhanced Raman spectroscopy applications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Angela Capaccio ◽  
Antonio Sasso ◽  
Giulia Rusciano
Keyword(s):  
Raman Spectroscopy ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Cost Effective ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Signal ◽  
Plasmonic Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Good Signal

AbstractThe fabrication of plasmonic nanostructures with a reliable, low cost and easy approach has become a crucial and urgent challenge in many fields, including surface-enhanced Raman spectroscopy (SERS) based applications. In this frame, nanoporous metal films are quite attractive, due to their intrinsic large surface area and high density of metal nanogaps, acting as hot-spots for Raman signal enhancement. In this paper, we report a detailed study on the fabrication of nanoporous silver-based SERS substrates, obtained by the application of two successive treatments with an Inductively Coupled Plasma (ICP) system, using synthetic air and Ar as feeding gases. The obtained substrates exhibit a quite broad plasmonic response, covering the Vis–NIR range, and an enhancement factor reaching 6.5 $$\times\, 10^7$$ × 10 7 , estimated by using 4-mercaptobenzoic acid (4-MBA) as probe molecule at 532 nm. Moreover, the substrates exhibit a quite good spatial reproducibility on a centimeter scale, which assures a good signal stability for analytical measurements. Globally, the developed protocol is easy and cost effective, potentially usable also for mass production thanks to the remarkable inter-batches reproducibility. As such, it holds promise for its use in SERS-based sensing platforms for sensitive detection of targets molecules.

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