Gold nanoparticle coated U-bend fibre optic probe for localized surface plasmon resonance based detection of explosive vapours

Bharadwaj, Reshma; Mukherji, Soumyo

doi:10.1016/j.snb.2013.11.026

Cited by 76 publications

(32 citation statements)

References 24 publications

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“…Such approaches of deliberately diminishing the smoothness of the as-deposited plasmonic film, might be promising in the development of FO-SPR instruments because, as already well-established with the planar SPR substrates [16], they could enhance the sensor's refractometric response, or eventually they could enable additional functionalities, like multiplexing [17] or localized SPR (LSPR) [18], [19], thus allowing parallel analysis of different target analytes [20] or detection of tiny biomolecules in low amounts [16], respectively. The optimized wet chemistry protocols enable the synthesis of a wide variety of nanomaterials (i.e.…”

Section: Introductionmentioning

confidence: 99%

Thermal annealing of gold coated fiber optic surfaces for improved plasmonic biosensing

Antohe

Schouteden

Goos

et al. 2016

Sensors and Actuators B: Chemical

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The morphological properties of thin gold (Au) films sputtered onto fiber optic (FO) substrates play an essential role in the overall performance of the sensing devices relying on surface plasmon resonance (SPR) effects. In this work, the influence of thermal treatments on the structural changes of the Au layer coated on the FO-SPR sensors, and consequently on their plasmonic biosensing performance, was systematically investigated. First, the sensors were exposed to different annealing temperatures for different durations and their sensitivity was evaluated by refractometric measurements in sucrose dilutions. The attained results suggested the optimal annealing conditions that were further validated using a split-plot experimental design statistical model. Room-temperature scanning tunneling microscopy (STM) imaging of the FO substrates revealed changes in the granular surface texture of the thermally treated Au films that could be linked to the observed increase in sensitivity of the treated sensors. The FO sensors, annealed under optimal conditions, were finally tested as label-free aptamer -based biosensors for the detection of Ara h 1 peanut allergen. Remarkably, the results demonstrated a superior biosensing performance of the thermally treated FO sensors, as the limit of detection (LOD) was improved with up to two orders of magnitude compared to a similar non-annealed FO-SPR sensor. This significant increase in sensitivity represents a major step forward in the facile and cost-effective preparation of FO-SPR sensors capable of label-free detection of various biomolecular targets.

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Section: Introductionmentioning

confidence: 99%

Thermal annealing of gold coated fiber optic surfaces for improved plasmonic biosensing

Antohe

Schouteden

Goos

et al. 2016

Sensors and Actuators B: Chemical

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“…O sensor demonstrou resposta linear entre 0,02-1,42 µg mL -1 e LOD de 1,40 ng mL 1 para a detecção de metamidofós. A integração de NPs-M com fibras ópticas podem também resultar em biossensores interessantes, como no trabalho de Bharadwaj et al, 106 no qual foi desenvolvido um biosensor a base de NPAu imobilizadas em fibra óptica com formato em U. As NPAu foram previamente funcionalizadas com cisteamina, L-cisteamina e ácido 4-mercaptobenzóico que funcionam como sítios de ligação para a detecção de vapores explosivos (2,4,6-trinitrotolueno (TNT); 2,4-dinitrotolueno (DNT); ciclotrimetilenotrinitramina (RDX) e tetranitrato de pentaeritritol (PETN)).…”

Section: Comparação Do Desempenho De Biossensores Plasmônicos Utilizaunclassified

Ressonância de plasmon de superfície localizado e aplicação em biossensores e células solares

Santos¹,

Santos²,

Thesing³

et al. 2016

Quim. Nova

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LOCALIZED SURFACE PLASMON RESSONANCE APPLIED TO BIOSENSORS AND SOLAR CELLS. Within the last decades, the research on nanoparticles presenting localized surface plasmon resonance has increased constantly. In these materials, the interaction between electrons and incident light results in charge separation, enhancement of the electromagnetic field on the nanoparticles surface and in unique optical properties. Although many metals such as gold, silver, copper and aluminum present localized surface plasmon resonance within the visible range, gold and silver are the most commonly studied metals, due to the chemical inertia of gold and intense plasmon resonance from silver. In this review, we provide a description of the origin of localized surface plasmon resonance through the works developed by Mie, Maxwell and Maxwell-Garnett and a description of many examples of application of plasmonic nanoparticles on biosensors and solar cells, detailing the contribution of these plasmonic nanoparticles on the performance of these devices.Keywords: LSPR; Localized Surface Plasmon Resonance; biosensor; solar cell. INTRODUÇÃONos últimos 20 anos o interesse por nanopartículas metálicas (NPs-M) tem aumentado constantemente devido a sua ampla variedade de aplicações.1-8 Vários grupos de pesquisa têm estudado desde nanopartículas isoladas de cerca de 1 nm até nanopartículas de centenas de nanômetros, assim como seus aglomerados, buscando entender seu comportamento óptico e catalítico. Adicionalmente, a literatura descreve a constante busca por metodologias de síntese cada vez mais simples, de baixo custo e com alta reprodutibilidade. O comportamento óptico de nanopartículas metálicas tem fascinado a humanidade há vários séculos através de obras de arte, mesmo antes que a palavra nanotecnologia fosse utilizada.9 Um dos exemplos mais conhecidos é a Taça de Lycurgus (século 4 d.C), que tem em sua composição nanopartículas de ouro (NPAu).10 No entanto, foi somente em 1857 que as NPs-M receberam maior atenção devido aos estudos de Michael Faraday sobre o efeito da interação da luz em uma solução coloidal de NPAu obtida através da redução do cloreto de ouro pelo fósforo.11,12 Deste então, o interesse nestas NPs tem aumentado e novas metodologias de síntese e caracterização têm sido desenvolvidas, possibilitando grande controle de tamanho e formato.13-15 A pesquisa nesta área foi enriquecida pela compreensão do efeito da ressonância de plasmon de superfície localizado (LSPR), que explica o comportamento óptico destes materiais. Mie foi o primeiro a elucidar a origem das cores nestas estruturas e sua teoria foi posteriormente complementada com os modelos de Maxwell-Garnett que explicavam a interação de NPs-M com o meio. Estes estudos proporcionaram uma ampla visão quanto as possíveis aplicações das NPs-M, sendo atualmente empregada no desenvolvimento de novos materiais como células solares, biossensores e catalisadores. Nesta revisão, serão abordados os embasamentos teóricos envolvidos no efeito LSPR de NPs-M, destacando a aplicação destas n...

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“…The field of chemical sensing is nowadays of great importance [1] in industry, security [2,3], biomedical applications [4,5], manufacturing processes and fuel transportation [6]. In particular, fiber-optic based chemical sensors have shown interesting properties either for the detection of specific gases in air [7][8][9] or chemicals in solution [10].…”

Section: Introductionmentioning

confidence: 99%

Distributed photothermal spectroscopy in microstructured optical fibers: towards high-resolution mapping of gas presence over long distances

García-Ruiz

Pastor-Graells

Martins³

et al. 2017

Opt. Express

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, 2017, "Distributed photothermal spectroscopy in microstructured optical fibers: towards high-resolution mapping of gas presence over long distances", Optics Express, vol.25, n.3, pp. 1789Express, vol.25, n.3, pp. -1805 Available at http://dx.doi.org/10.1364/OE.25.001789 © 2017 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. Abstract: Chemical sensing using optical fibers is often challenging, as it is generally difficult to achieve strong interaction between the guided light and the analyte at the wavelength of interest for performing the detection. Despite this difficulty, many schemes exist (and can be found in the literature) for point chemical fiber sensors. However, the challenge increases even further when it comes to performing fully distributed chemical sensing. In this case, the optical signal which interacts with the analyte is typically also the signal that has to travel to and from the interrogator: for a good sensitivity, the light should interact strongly with the analyte, leading inevitably to an increased loss and a reduced range. Few works in the literature actually provide demonstrations of truly distributed chemical sensing and, although there have been several attempts to realize these sensors (e.g. based on special fiber coatings), the vast majority of these attempts has failed to reach widespread use due to several reasons, among them: lack of sensitivity or selectivity, lack of range or resolution, cross sensitivity to temperature or strain, or need to work at specific wavelengths where fiber instrumentation becomes extremely expensive or unavailable. In this work we provide a preliminary demonstration of the possibility of achieving distributed detection of gas presence with spectroscopic selectivity, high spatial resolution, potential for long range measurements and feasibility of having most of the interrogator system working at conventional telecom wavelengths. For a full exploitation of this concept, new fibers (or more likely, fiber bundles) should be developed capable of guiding specific wavelengths in the IR (corresponding to gas absorption wavelengths) with good overlap with the analyte while also having a solid core with good transmission behavior at 1.55 µm, and good thermal coupling between the two guiding structures. Article begins on next page)

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Gold nanoparticle coated U-bend fibre optic probe for localized surface plasmon resonance based detection of explosive vapours

Cited by 76 publications

References 24 publications

Thermal annealing of gold coated fiber optic surfaces for improved plasmonic biosensing

Thermal annealing of gold coated fiber optic surfaces for improved plasmonic biosensing

Ressonância de plasmon de superfície localizado e aplicação em biossensores e células solares

Distributed photothermal spectroscopy in microstructured optical fibers: towards high-resolution mapping of gas presence over long distances

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