Investigation of the performance of thermally generated gold nanoislands for LSPR and SERS applications

Bonyár, Attila; Csarnovics, István; Vereš, M.; Himics, L.; Csík, A.; Kámán, Judit; Balázs, Läszlö; Kökényesi, S.

doi:10.1016/j.snb.2017.08.063

Cited by 62 publications

(35 citation statements)

References 28 publications

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“…The application of thermally-generated nano-islands to sensing was pioneered by Rubinstein’s group [ 21 , 34 , 35 , 36 , 37 ], and subsequently, many other groups have investigated the optical properties and the sensitivity of various platforms for sensing applications [ 38 , 39 , 40 , 41 ].…”

Section: Solid-state Dewetting Of Thin Metal Films: Principle and mentioning

confidence: 99%

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

et al. 2020

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Nano-islands are entities (droplets or other shapes) that are formed by spontaneous dewetting (agglomeration, in the early literature) of thin and very thin metallic (especially gold) films on a substrate, done by post-deposition heating or by using other sources of energy. In addition to thermally generated nano-islands, more recently, nanoparticle films have also been dewetted, in order to form nano-islands. The localized surface plasmon resonance (LSPR) band of gold nano-islands was found to be sensitive to changes in the surrounding environment, making it a suitable platform for sensing and biosensing applications. In this review, we revisit the development of the concept of nano-island(s), the thermodynamics of dewetting of thin metal films, and the effect of the substrate on the morphology and optical properties of nano-islands. A special emphasis is made on nanoparticle films and their applications to biosensing, with ample examples from the authors’ work.

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Section: Solid-state Dewetting Of Thin Metal Films: Principle and mentioning

confidence: 99%

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

et al. 2020

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“…This is supported by the fact, that our samples are highly transparent in the visible range of light. 56 The photopolymerization process, which leads to an increase in the refractive index, shifts the position of the peak. 40 This phenomenon can be effectively utilized for a large variety of sensing purposes (chemical sensors, gas sensors, biosensors, etc.)…”

Section: Discussionmentioning

confidence: 99%

<p>Development and Study of Biocompatible Polyurethane-Based Polymer-Metallic Nanocomposites</p>

Csarnovics¹,

Burunkova²,

Sviazhina³

et al. 2020

NSA

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Introduction: In this work we selected components, developed technology and studied a number of parameters of polymer nanocomposite materials, remembering that the material would have high optical and good mechanical characteristics, good sorption ability in order to ensure high value of the optical signal for a short time while maintaining the initial geometric shape. In addition, if this nanocomposite is used for medicine and biology (biocompatible or biocidal materials or the creation of a sensor based on it), the material must be non-toxic and/or biocompatible. We study the creation of polymer nanocomposites which may be applied as biocompatible materials with new functional parameters. Material and Methods: A number of polymer nanocomposites based on various urethaneacrylate monomers and nanoparticles of gold, silicon oxides, zinc and/or titanium oxides are obtained, their mechanical (microhardness) properties and wettability (contact angle) are studied. The set of required, biology-related properties of these materials, such as toxicity and sorption of microorganisms are also investigated in order to prove their possible applicability. Results and Discussion: The composition of the samples influences their microhardness and the value of contact angle, which means that varying with the monomer and the metallic, oxide nanoparticles composition, we could change these parameters. Besides it, the set of required, biology-related properties of these materials, such as toxicity and sorption of microorganisms were also investigated in order to prove their possible applicability. It was shown that the materials are non-toxic, the adhesion of microorganisms on their surface also could be varied by changing their composition. Conclusion: The presented polymer nanocomposites with different compositions of monomer and the presence of nanoparticles in them are prospective material for a possible bioapplication as it is biocompatible, not toxic. The sorption of microorganism could be varied depending on the type of bacterias, the monomer composition, and nanoparticles.

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“…A titanium dioxide (TiO 2 ) matrix and noble metal nanoparticles (Au or/and Ag) may be used independently in sensing applications [23][24][25][26][27][28][29][30], but it is known that their sensing capabilities are enhanced when they are combined [31]. Moreover, by using a mixture of these materials, the mechanical stability of TiO 2 is combined with the plasmonic sensing properties of Au.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Sensitivity of Nanoplasmonic Thin Films for Ethanol Vapor Detection

Rodrigues

Vaz

2020

Materials

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Nanoplasmonic thin films, composed of noble metal nanoparticles (gold) embedded in an oxide matrix, have been a subject of considerable interest for Localized Surface Plasmon Resonance (LSPR) sensing. Ethanol is one of the promising materials for fuel cells, and there is an urgent need of a new generation of safe optical sensors for its detection. In this work, we propose the development of sensitive plasmonic platforms to detect molecular analytes (ethanol) through changes of the LSPR band. The thin films were deposited by sputtering followed by a heat treatment to promote the growth of the gold nanoparticles. To enhance the sensitivity of the thin films and the signal-to-noise ratio (SNR) of the transmittance–LSPR sensing system, physical plasma etching was used, resulting in a six-fold increase of the exposed gold nanoparticle area. The transmittance signal at the LSPR peak position increased nine-fold after plasma treatment, and the quality of the signal increased six times (SNR up to 16.5). The optimized thin films seem to be promising candidates to be used for ethanol vapor detection. This conclusion is based not only on the current sensitivity response but also on its enhancement resulting from the optimization routines of thin films’ architectures, which are still under investigation.

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Investigation of the performance of thermally generated gold nanoislands for LSPR and SERS applications

Cited by 62 publications

References 28 publications

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

<p>Development and Study of Biocompatible Polyurethane-Based Polymer-Metallic Nanocomposites</p>

Enhancing the Sensitivity of Nanoplasmonic Thin Films for Ethanol Vapor Detection

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