Gas Sensing with High-Resolution Localized Surface Plasmon Resonance Spectroscopy

Bingham, Julia M.; Anker, Jeffrey N.; Kreno, Lauren E.; Duyne, Richard P. Van

doi:10.1021/ja1074272

Cited by 216 publications

(194 citation statements)

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“…Recent advancements in plasmonic research and nanofabrication techniques led the development of surface and localized surface plasmon-based (LSPR) hydrogen sensors using Pd [2][3][4]. Nanoparticle or LSPR sensors show good potential for faster response times [5,6]. However, the broad spectral response of LSPR-based hydrogen sensors arises as an issue, which, later on, led the researchers to reduce the linewidth with the help of a whispering gallery mode cavity [7], and to develop highly sensitive hybrid sensors such as using Pd with a good plasmonic metal [8,9].…”

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confidence: 99%

Perfectly absorbing ultra thin interference coatings for hydrogen sensing

et al. 2016

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Here we numerically demonstrate a straightforward method for optical detection of hydrogen gas by means of absorption reduction and colorimetric indication. A perfectly absorbing metal-insulator-metal (MIM) thin film interference structure is constructed using a silver metal back reflector, silicon dioxide insulator, and palladium as the upper metal layer and hydrogen catalyst. The thickness of silicon dioxide allows the maximizing of the electric field intensity at the Air∕SiO 2 interface at the quarter wavelengths and enabling perfect absorption with the help of highly absorptive palladium thin film ∼7 nm. While the exposure of the MIM structure to H 2 moderately increases reflection, the relative intensity contrast due to formation of metal hydride is extensive. By modifying the insulator film thickness and hence the spectral absorption, the color is tuned and eyevisible results are obtained. Hydrogen H 2 sensing requires development of highly sensitive, reliable, and short response-time sensors due to its use in critical applications such as fuel-cells, pharmaceuticals, and petroleum and chemical production. Palladium (Pd) can absorb H 2 upon exposure and transform into palladium hydride PdH x , and the optical and electrical properties of Pd metal are changed by such transformation [1]. Recent advancements in plasmonic research and nanofabrication techniques led the development of surface and localized surface plasmon-based (LSPR) hydrogen sensors using Pd [2][3][4]. Nanoparticle or LSPR sensors show good potential for faster response times [5,6]. However, the broad spectral response of LSPR-based hydrogen sensors arises as an issue, which, later on, led the researchers to reduce the linewidth with the help of a whispering gallery mode cavity [7], and to develop highly sensitive hybrid sensors such as using Pd with a good plasmonic metal [8,9]. For example, Alivisatos and co-workers have demonstrated highly sensitive hydrogen sensors by placing Pd nanoparticles close to the sharp corners of nanoantennas [10].Such sensing mechanisms are based on probing of the scattering properties of nanoantenna-Pd nanoparticle structure, rather than the direct probing of scattering properties of Pd nanoparticles that shows small wavelength shifts upon hydrogen exposure. Other important plasmon-based hydrogen sensing mechanism is based on plasmonic-perfect absorbers [11][12][13], and single crystal Pd and its alloy-coated nanowires [14,15]. The motivation behind the absorbance-based sensors is to minimize the requirement for the bulky optical setups, expensive light sources, and spectrometers by only probing the scattered light intensity at perfect-absorption wavelength. Moreover, some of the recent studies report the visual detection of hydrogen by using thin film optical coatings to circumvent the problems of hydrogen sensors based on electrical readout [16,17]. Despite the demonstration of visual detection of H 2 , the thin film structure did not take full advantage of the lossy nature of Pd films. In this study, we demo...

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confidence: 99%

Perfectly absorbing ultra thin interference coatings for hydrogen sensing

et al. 2016

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“…LSPR of metal nanostructures is shown to be sensitive enough to differentiate various inert gases (refractive index difference on the order of 3 × 10 −4 refractive index units (RIU)), probe the conformational changes of individual biomacromolecules, detect single biomolecule binding events, monitor the kinetics of catalytic activity of single nanoparticles and even optically detect a single electron [2][3][4][5][6] . In the design of LSPR-based biosensors, two factors are of prime importance: (i) the bulk refractive index sensitivity and the electromagnetic decay length of the nanostructures employed as optical transducers.…”

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Peptide Functionalized Gold Nanorods for the Sensitive Detection of a Cardiac Biomarker Using Plasmonic Paper Devices

Tadepalli

Kuang

Jiang

et al. 2015

Sci Rep

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The sensitivity of localized surface plasmon resonance (LSPR) of metal nanostructures to adsorbates lends itself to a powerful class of label-free biosensors. Optical properties of plasmonic nanostructures are dependent on the geometrical features and the local dielectric environment. The exponential decay of the sensitivity from the surface of the plasmonic nanotransducer calls for the careful consideration in its design with particular attention to the size of the recognition and analyte layers. In this study, we demonstrate that short peptides as biorecognition elements (BRE) compared to larger antibodies as target capture agents offer several advantages. Using a bioplasmonic paper device (BPD), we demonstrate the selective and sensitive detection of the cardiac biomarker troponin I (cTnI). The smaller sized peptide provides higher sensitivity and a lower detection limit using a BPD. Furthermore, the excellent shelf-life and thermal stability of peptide-based LSPR sensors, which precludes the need for special storage conditions, makes it ideal for use in resource-limited settings.Plasmonic biosensors based on localized surface plasmon resonance (LSPR) are highly attractive for lab-on-chip devices that are cost-effective and used in point-of-care biodiagnostics 1 . LSPR of metal nanostructures is shown to be sensitive enough to differentiate various inert gases (refractive index difference on the order of 3 × 10 −4 refractive index units (RIU)), probe the conformational changes of individual biomacromolecules, detect single biomolecule binding events, monitor the kinetics of catalytic activity of single nanoparticles and even optically detect a single electron [2][3][4][5][6] . In the design of LSPR-based biosensors, two factors are of prime importance: (i) the bulk refractive index sensitivity and the electromagnetic decay length of the nanostructures employed as optical transducers. There have been numerous studies that focus on the design, synthesis and the validation of novel plasmonic nanostructures with high bulk refractive index sensitivity [7][8][9] . However, studies focusing on understanding the effect of the electromagnetic (EM) decay length on the ultimate performance of the LSPR-based biosensor are limited 10,11 . Although the decay in the sensitivity of plasmonic nanostructures with distance has been widely investigated 12,13 , to the best of our knowledge, a direct comparison of the sensitivity of LSPR biosensors based on recognition layers of different sizes (i.e., thickness of the recognition layer) is largely unexplored.

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“…To overcome this, Bingham et al utilized high-resolution localized surface plasmon resonance (HR-LSPR) spectroscopy on arrays of silver nanoparticles to detect gas-induced refractive index changes in the 10 -4 range ( Figure 6A) [44]. For their gas sensing experiments, the authors fabricated Ag nanoparticle arrays using nanosphere lithography and recorded extinction spectra while alternating the gaseous environment repeatedly between helium/argon and helium/nitrogen every 10 s. They observed clear spectral redshifts when switching from He to the target gases, with wavelength shifts of 0.048 nm and 0.058 nm for Ar and N 2 , respectively, which corresponds to a sensitivity of around 200 nm/RIU ( Figure 6B).…”

Section: Label-free Refractive Index Gas Sensingmentioning

confidence: 99%

Plasmonic gas and chemical sensing

2014

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Sensitive and robust detection of gases and chemical reactions constitutes a cornerstone of scientific research and key industrial applications. In an effort to reach progressively smaller reagent concentrations and sensing volumes, optical sensor technology has experienced a paradigm shift from extended thin-film systems towards engineered nanoscale devices. In this size regime, plasmonic particles and nanostructures provide an ideal toolkit for the realization of novel sensing concepts. This is due to their unique ability to simultaneously focus light into subwavelength hotspots of the electromagnetic field and to transmit minute changes of the local environment back into the farfield as a modulation of their optical response. Since the basic building blocks of a plasmonic system are commonly noble metal nanoparticles or nanostructures, plasmonics can easily be integrated with a plethora of chemically or catalytically active materials and compounds to investigate processes ranging from hydrogen absorption in palladium to the detection of trinitrotoluene (TNT). In this review, we will discuss a multitude of plasmonic sensing strategies, spanning the technological scale from simple plasmonic particles embedded in extended thin films to highly engineered complex plasmonic nanostructures. Due to their flexibility and excellent sensing performance, plasmonic structures may open an exciting pathway towards the detection of chemical and catalytic events down to the single molecule level.

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Gas Sensing with High-Resolution Localized Surface Plasmon Resonance Spectroscopy

Cited by 216 publications

References 20 publications

Perfectly absorbing ultra thin interference coatings for hydrogen sensing

Perfectly absorbing ultra thin interference coatings for hydrogen sensing

Peptide Functionalized Gold Nanorods for the Sensitive Detection of a Cardiac Biomarker Using Plasmonic Paper Devices

Plasmonic gas and chemical sensing

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