Gold Nanodisks Plasmonic Array for Hydrogen Sensing at Low Temperature

Sturaro, Marco; Zacco, Gabriele; Zilio, Pierfrancesco; Surpi, Alessandro; Bazzan, M.; Martucci, Alessandro

doi:10.3390/s19030647

Cited by 12 publications

(10 citation statements)

References 14 publications

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“…Our results, obtained with plasmonic nanostructures prepared by t-SPL lithography, are in close match with experiments obtained by conventional lithography and with numerical simulations of the optical response available in refs − . Among the broad literature reporting optical simulations for plasmonic nanodisc arrays, we can, e.g., refer to the finite element simulations of ref , which consider Au nanodisc arrays of comparable geometry, prepared by conventional interference lithography. As a general rule, the comparison is semiquantitative and affected by details such as the dielectric environment surrounding the Au nanodisc (leading to an increase in the resonant wavelength for increasing refractive index), the thickness of the Au film (which produces a more substantial red shift when the thickness is reduced below 10 nm), and the gap separating the nanodiscs (which results in a red shift of the plasmon frequency, more substantial at smaller separations below 50 nm due to near-field coupling).…”

Section: Resultsmentioning

confidence: 99%

Thermal Scanning-Probe Lithography for Broad-Band On-Demand Plasmonic Nanostructures on Transparent Substrates

Ramò,

Giordano,

Ferrando

et al. 2023

ACS Appl. Nano Mater.

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Thermal scanning-probe lithography (t-SPL) is a high-resolution nanolithography technique that enables the nanopatterning of thermosensitive materials by means of a heated silicon tip. It does not require alignment markers and gives the possibility to assess the morphology of the sample in a noninvasive way before, during, and after the patterning. In order to exploit t-SPL at its peak performances, the writing process requires applying an electric bias between the scanning hot tip and the sample, thereby restricting its application to conductive, optically opaque, substrates. In this work, we show a t-SPL-based method, enabling the noninvasive high-resolution nanolithography of photonic nanostructures onto optically transparent substrates across a broad-band visible and near-infrared spectral range. This was possible by intercalating an ultrathin transparent conductive oxide film between the dielectric substrate and the sacrificial patterning layer. This way, nanolithography performances comparable with those typically observed on conventional semiconductor substrates are achieved without significant changes of the optical response of the final sample. We validated this innovative nanolithography approach by engineering periodic arrays of plasmonic nanoantennas and showing the capability to tune their plasmonic response over a broad-band visible and near-infrared spectral range. The optical properties of the obtained systems make them promising candidates for the fabrication of hybrid plasmonic metasurfaces supported onto fragile low-dimensional materials, thus enabling a variety of applications in nanophotonics, sensing, and thermoplasmonics.

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Section: Resultsmentioning

confidence: 99%

Thermal Scanning-Probe Lithography for Broad-Band On-Demand Plasmonic Nanostructures on Transparent Substrates

Ramò,

Giordano,

Ferrando

et al. 2023

ACS Appl. Nano Mater.

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“…Gold nanorods were designed in 2016 by Priscila Falagan-Lotscha for biological applications, such as cytotoxicity detection [ 131 ], colorimetric determination of hypochlorite from water [ 132 ], fluorescence enhancement [ 133 ], the killing of tumor cells via photothermal ablation [ 134 ], strain sensing applications [ 135 ] and solar cell applications [ 136 ]. Gold nano-disk has been used for hydrogen sensing [ 137 ], PSA cancer marker detection [ 138 ], energy harvesting and spintronics/magnetics, biosensors [ 139 ], optical switching [ 140 ], medical diagnostics drug delivery or chemical sensing [ 141 ], and other sensing applications [ 142 ]. Maura Cesaria designed nano holes for nano-optical transducers sensing and integrated/multiple detection of lab-on-a-chip devices using unconventional lithography [ 143 ].…”

Section: Application Of Nanomaterials In Biosensingmentioning

confidence: 99%

Optical Fiber, Nanomaterial, and THz-Metasurface-Mediated Nano-Biosensors: A Review

et al. 2022

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The increasing use of nanomaterials and scalable, high-yield nanofabrication process are revolutionizing the development of novel biosensors. Over the past decades, researches on nanotechnology-mediated biosensing have been on the forefront due to their potential application in healthcare, pharmaceutical, cell diagnosis, drug delivery, and water and air quality monitoring. The advancement of nanoscale science relies on a better understanding of theory, manufacturing and fabrication practices, and the application specific methods. The topology and tunable properties of nanoparticles, a part of nanoscale science, can be changed by different manufacturing processes, which separate them from their bulk counterparts. In the recent past, different nanostructures, such as nanosphere, nanorods, nanofiber, core–shell nanoparticles, nanotubes, and thin films, have been exploited to enhance the detectability of labelled or label-free biological molecules with a high accuracy. Furthermore, these engineered-materials-associated transducing devices, e.g., optical waveguides and metasurface-based scattering media, widened the horizon of biosensors over a broad wavelength range from deep-ultraviolet to far-infrared. This review provides a comprehensive overview of the major scientific achievements in nano-biosensors based on optical fiber, nanomaterials and terahertz-domain metasurface-based refractometric, labelled and label-free nano-biosensors.

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“…Among such nanostructures, nanodisks arrays are of special relevance, since several works with nanodisks are present in the literature, ranging from on-chip to optical fiber solutions. Although only scarce reports have been found to reach telecom wavelengths, a mention to those works must be made [ 200 , 201 , 202 , 203 , 204 , 205 , 206 , 207 ]. Due to the nature of the available fabrication methods, usually via lithographic procedures, such as NSL, NIL, or laser interference lithography (LIL), just to name a few, these nanostructures are typically found in array configurations.…”

Section: Nanostructuresmentioning

confidence: 99%

Advances in Plasmonic Sensing at the NIR—A Review

Santos

Almeida

Pastoriza‐Santos

et al. 2021

Sensors

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Surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) are among the most common and powerful label-free refractive index-based biosensing techniques available nowadays. Focusing on LSPR sensors, their performance is highly dependent on the size, shape, and nature of the nanomaterial employed. Indeed, the tailoring of those parameters allows the development of LSPR sensors with a tunable wavelength range between the ultra-violet (UV) and near infra-red (NIR). Furthermore, dealing with LSPR along optical fiber technology, with their low attenuation coefficients at NIR, allow for the possibility to create ultra-sensitive and long-range sensing networks to be deployed in a variety of both biological and chemical sensors. This work provides a detailed review of the key science underpinning such systems as well as recent progress in the development of several LSPR-based biosensors in the NIR wavelengths, including an overview of the LSPR phenomena along recent developments in the field of nanomaterials and nanostructure development towards NIR sensing. The review ends with a consideration of key advances in terms of nanostructure characteristics for LSPR sensing and prospects for future research and advances in this field.

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Gold Nanodisks Plasmonic Array for Hydrogen Sensing at Low Temperature

Cited by 12 publications

References 14 publications

Thermal Scanning-Probe Lithography for Broad-Band On-Demand Plasmonic Nanostructures on Transparent Substrates

Thermal Scanning-Probe Lithography for Broad-Band On-Demand Plasmonic Nanostructures on Transparent Substrates

Optical Fiber, Nanomaterial, and THz-Metasurface-Mediated Nano-Biosensors: A Review

Advances in Plasmonic Sensing at the NIR—A Review

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