An advance Towards the Synthesis of Ag Nanorod Arrays with Controlled Surface Roughness for SERS Substrates

Navarro-Arenas, Juan; Calderón, Jonathan; Abargues, Rafael; Rodríguez-Cantó, Pedro J.; Suárez, Isaac; Pastor, Juan P. Martínez; Hill, Daniel

doi:10.1016/j.matpr.2016.01.072

Cited by 3 publications

(3 citation statements)

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“…It is well known that a nanoscale asperity of metals such as silver (Ag) generates localized SP resonance with intensified nearfield light. The roughness effect on the properties of metal films and particles [8][9][10][11], especially Ag superlens [12][13][14], has been investigated in some recent works. For example, it has been shown that quasi-periodic "roughness" can enhance the resolution of the superlens-based approach [12].…”

Section: Introductionmentioning

confidence: 99%

Achieving pattern uniformity in plasmonic lithography by spatial frequency selection

et al. 2017

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Abstract:The effects of the surface roughness of thin films and defects on photomasks are investigated in two representative plasmonic lithography systems: thin silver film-based superlens and multilayer-based hyperbolic metamaterial (HMM). Superlens can replicate arbitrary patterns because of its broad evanescent wave passband, which also makes it inherently vulnerable to the roughness of the thin film and imperfections of the mask. On the other hand, the HMM system has spatial frequency filtering characteristics and its pattern formation is based on interference, producing uniform and stable periodic patterns. In this work, we show that the HMM system is more immune to such imperfections due to its function of spatial frequency selection. The analyses are further verified by an interference lithography system incorporating the photoresist layer as an optical waveguide to improve the aspect ratio of the pattern. It is concluded that a system capable of spatial frequency selection is a powerful method to produce deep-subwavelength periodic patterns with high degree of uniformity and fidelity.

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Section: Introductionmentioning

confidence: 99%

Achieving pattern uniformity in plasmonic lithography by spatial frequency selection

et al. 2017

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“…[14][15][16] Gold, silver, and other nanostructures used in SERS technology can improve the sensitivity of conventional Raman spectroscopy and realize traceamount detection of chemical molecules. 17,18 SERS has speci-city, high sensitivity, narrow spectral bandwidth, and little water interference. Beneting from its advantages, it is widely used in various elds, such as food safety, 19 environmental analysis, 20 biomedical research, 21 and public safety.…”

Section: Introductionmentioning

confidence: 99%

Surface-enhanced Raman scattering using flower-like Ag/ZnO as active substrates for the label-free and sensitive detection of rhodamine 6G and melamine

Ren,

Song,

Wang

et al. 2024

Anal. Methods

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“…The LSPR can be described as the resonant photon-induced collective oscillation of free electrons on metal NPs at a given resonant frequency. The excitation of LSPR bands of Au and Ag NPs shows a powerful light absorption and/or scattering in the visible region, which strongly depends on their size, shape, and surrounding medium (substrates, solvents, and adsorbates). − As a result, the LSPR can be exploited as the transduction mechanism in high-performance sensing devices: the adsorption of molecules on the NP surface results in measurable spectral changes: wavelength and/or peak intensity of the LSPR spectrum. − Similar MIP sensors have been proposed to exploit surface plasmon resonance using noble metal thin films instead of NPs. For instance, Ayankojo et al reported a label-free sensing SPR platform using a hybrid organic–inorganic MIP film on Au thin films as an efficient tool for the real-time monitoring of antibiotics …”

Section: Introductionmentioning

confidence: 99%

Molecularly Imprinted Silver Nanocomposites for Explosive Taggant Sensing

Aznar-Gadea

Rodríguez-Cantó

Martínez‐Pastor

et al. 2021

ACS Appl. Polym. Mater.

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Sensing explosive taggants such as 3-nitrotoluene (3-NT) and 2,3-dimethyl-2,3-dinitrobutane has become a strategic priority in homeland security. This work reports the synthesis of a solid-state plasmonic sensor based on a nanocomposite of Ag nanoparticles (NPs) embedded in a molecularly imprinted polymer (MIP) for selective detection of 3-NT, an explosive taggant for 2,4,6-trinitrotoluene. In our approach, the in situ synthesis of Ag NPs and the molecular imprinting with 3-NT as a template take place simultaneously inside the polyethyleneimine (PEI) thin film during the baking step after spin coating. The MIP sensor fabrication is done by a low-cost, fast, and scalable one-step procedure. We demonstrate the chemosensing capabilities of Ag-PEI MIP nanocomposites to 3-NT using the localized surface plasmon resonance band intensity decay as a sensing parameter. The molecular imprinting approach results in an enhancement of specific sensor response to 3-NT, with a limit of detection of 54.8 ng for 3-NT and a sensitivity of 24.0% ± 3.0%. We tested the MIP sensor specificity by comparing the sensor response to several NO2-containing molecules. The Ag-PEI MIP sensor demonstrated a robust, specific molecular recognition toward 3-NT. Because the MIP nanocomposite sensor is easy to prepare, easy to use, and inexpensive, these plasmonic sensors can be easily implemented with portable reading platforms into remote explosive detection and bomb disposal robots.

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An advance Towards the Synthesis of Ag Nanorod Arrays with Controlled Surface Roughness for SERS Substrates

Cited by 3 publications

References 10 publications

Achieving pattern uniformity in plasmonic lithography by spatial frequency selection

Achieving pattern uniformity in plasmonic lithography by spatial frequency selection

Surface-enhanced Raman scattering using flower-like Ag/ZnO as active substrates for the label-free and sensitive detection of rhodamine 6G and melamine

Molecularly Imprinted Silver Nanocomposites for Explosive Taggant Sensing

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