Ordered gold nanoparticle arrays as surface-enhanced Raman spectroscopy substrates for label-free detection of nitroexplosives

Liu, Xiaojuan; Zhao, Liang; Shen, Hao; Xu, Hongxing; Lu, Lehui

doi:10.1016/j.talanta.2010.11.015

Cited by 76 publications

(54 citation statements)

References 45 publications

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“…Preferential orientation, also called crystallographic texture, can be observed in films of aligned particles. This alignment may be caused by faceting, [91][92][93] shape anisotropy, [94,95] growth method, [96][97][98][99][100] application of magnetic fields, [101] or epitaxy. [102][103][104] Nanoparticles may display epitaxial (oriented in-plane in two directions) or fibre texture (oriented out of plane in one direction).…”

Section: X-ray Diffractionmentioning

confidence: 99%

X-ray scattering characterisation of nanoparticles

Ingham

2015

Crystallography Reviews

138

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This article provides, in tutorial style, a review of X-ray scattering methods commonly used to characterise nanoparticles and gives numerous case studies of basic science and industrial applications right up to the present. It is divided into two major sections, broadly covering Xray diffraction and small-angle X-ray scattering. Each section begins with a brief introduction to the technique and the information that can be obtained by using it, followed by a discussion on experimental considerations, with a particular focus on nanoparticle characterisation. The techniques and analysis methods are demonstrated by way of examples of a wide variety of nanoparticle materials and synthesis methods. Recent advances in related techniques such as anomalous scattering and pair distribution function analysis are also described and discussed.

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Section: X-ray Diffractionmentioning

confidence: 99%

X-ray scattering characterisation of nanoparticles

Ingham

2015

Crystallography Reviews

138

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“…So far, various SERS-active substrates have been prepared using either the bottom-up or the top-down process, for example, aggregates and self-assembled colloidal metal nanoparticles (NPs), nanofabricated arrays of metal NPs on substrates, metal island films and roughened electrochemical metal electrodes [8,26–33]. However, a number of drawbacks usually arise during SERS measurements on such substrates.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Plasmonic Sensors

Tong

Wei

Zhang

et al. 2014

Sensors

Self Cite

195

109

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Plasmonic sensing has been an important multidisciplinary research field and has been extensively used in detection of trace molecules in chemistry and biology. The sensing techniques are typically based on surface-enhanced spectroscopies and surface plasmon resonances (SPRs). This review article deals with some recent advances in surface-enhanced Raman scattering (SERS) sensors and SPR sensors using either localized surface plasmon resonances (LSPRs) or propagating surface plasmon polaritons (SPPs). The advances discussed herein present some improvements in SERS and SPR sensing, as well as a new type of nanowire-based SPP sensor.

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“…Characterization of metallic nanoparticles in solid-state systems allows integration of these performance-enhancing materials in a growing number of applications in alternative energy (photovoltaics) [1,2], health (diagnostics/microarrays) [3][4][5], national security (biosensors [6,7], telecommunication [8]), nanotexturing [9], and catalysis (building carbon nanotubes) [10]. Ordered arrays of metal nanoparticles constitute metamaterials that exhibit extraordinary spectral features.…”

Section: Introductionmentioning

confidence: 99%

Geometric effects on far-field coupling between multipoles of nanoparticles in square arrays

2011

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Metallic nanoparticles organized in regular arrays exhibit an extraordinary spectral feature that arises from electromagnetic coupling between localized surface plasmons and constructive interference from diffracted far-field radiation. A rapid semianalytical description of coupling between dipoles and scattering modes is applied to examine the influence of nanoparticle size, dielectric, and interparticle separation on the occurrence, resonant wavelength, and intensity of the extraordinary spectral feature. Introducing a dynamic polarizability that includes higher-order electric poles into the description accurately characterizes plasmon resonances of larger particles. Previously unrecognized patterns and periodic variations in the extraordinary feature were observed to result from modulations in polarizability, as well as from interference of scattered modes that were distinguishable for the first time using the rapid semianalytic solution. Streamlined rational design of metamaterials with optimum optical properties using the rapid semianalytic coupled dipole approximation is considered.

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Ordered gold nanoparticle arrays as surface-enhanced Raman spectroscopy substrates for label-free detection of nitroexplosives

Cited by 76 publications

References 45 publications

X-ray scattering characterisation of nanoparticles

X-ray scattering characterisation of nanoparticles

Recent Advances in Plasmonic Sensors

Geometric effects on far-field coupling between multipoles of nanoparticles in square arrays

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