Optical and electrochemical properties of tunable host–guest complexes linked to plasmonic interfaces

Barka-Bouaifel, Fatiha; Niedziółka‐Jönsson, Joanna; Castel, Xavier; Saison, Ophélie; Akjouj, Abdellatif; Pennec, Yan; Djafari‐Rouhani, Bahram; Woisel, Patrice; Lyskawa, Joël; Sambe, Léna; Cooke, Graeme; Bezzi, Nacer; Boukherroub, Rabah; Szunerits, Sabine

doi:10.1039/c0jm03293j

Cited by 19 publications

(18 citation statements)

References 62 publications

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“…35 Gao et al 36,37 used rf magnetron co-sputtering to embed isolated gold nanoparticles into the dielectric matrix. We recently focused on the deposition of oxide-based overlayers such as tin-doped indium oxide (ITO) 38,39 and SiO x 29,40,41 using r.f. sputtering and plasmaenhanced chemical vapour deposition (PECVD) to stabilize gold nanostructures.…”

Section: Fabrication Methodsmentioning

confidence: 99%

Sensing using localised surface plasmon resonance sensors

Szunerits¹,

Boukherroub²

2012

Chem. Commun.

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276

202

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The bright colours of noble metal particles have attracted considerable interest since historical times, where they were used as decorative pigments in stained glass windows. More recently, the tuneable optical properties of metal nanoparticles and their addressability via spectroscopic techniques have brought them back into the forefront of fundamental and applied research fields. Much of the recent attention concerning metal nanoparticles such as gold and silver has been their use as small-volume, ultra-sensitive label-free optical sensors. Plasmonic nanoparticles act in this case as transducers that convert changes in the local refractive index into spectral shifts of the localized surface plasmon resonance (LSPR) band. This LSPR-shift assay is a general technique for measuring binding affinities and rates from any molecule that induces a change in the local refractive index around the metallic nanostructures. By attaching molecular recognition elements (chemical or biological ligands) on the nanostructures, specificity and selectivity to the analyte of interest are introduced into the nanosensor. In this review, we will discuss the different methods used to fabricate plasmonic nanosensors. A special emphasis will be given to techniques used to link plasmonic nanostructures to surfaces. While the difference between colorimetric and refractive index sensing approaches will be briefly described, the importance to distinguish between bulk refractive index (RI) sensing and molecular near-field refractive index sensing will be discussed. The recent progress made in the development of novel surface functionalization strategies together with the formation of optically and mechanically stable LSPR sensors will be highlighted.

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Section: Fabrication Methodsmentioning

confidence: 99%

Sensing using localised surface plasmon resonance sensors

Szunerits¹,

Boukherroub²

2012

Chem. Commun.

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276

202

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“…We first present how refractive index varies with the change in adsorbed molecules single strand DNA (ssDNA) into double strand DNA (DNA) on the sensor surface, then the refractive index of sensing medium (n a ) is mathematically modified as [11,16]: Here, n a (DNA) is the RI of the sensing dielectric after adsorption of DNA molecules, n a (PBS) is RI of the sensing dielectric before adsorption of DNA molecules, c a is the concentration of adsorbed DNA molecules, and dn dc / is the RI increment due to the adsorbate (DNA). The RI increment parameter is dn dc / = 0.182 cm 3 /gm in the case of using a standard buffer solution [16].…”

Section: Detection Approachmentioning

confidence: 99%

“…The understanding of the properties of the gold nanoparticles (AuNPs) is significantly more complex when the AuNPs are deposited on a substrate [1,5,6] and/or when the interaction between the AuNPs and the substrate is not neglected [7][8][9]. It is quite clear from the theoretical and experimental studies on the AuNPs that several parameters govern their behavior [10,11].…”

Section: Introductionmentioning

confidence: 99%

MoS2–graphene hybrid nanostructures enhanced localized surface plasmon resonance biosensors

barghouti

Akjouj

Mir

2020

Optics & Laser Technology

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We propose a new configuration of a localized surface plasmon resonance (LSPR) biosensor that is based on MoS 2 -graphene hybrid structures for ultrasensitive detection of molecules. The performance parameters of the proposed biosensor are defined in terms of absorption and sensitivity. Our study show that sensitivity can be greatly increased either by adding a bilayer MoS 2 /graphene on the Au nanoparticles or by adding the MoS 2 layer or the graphene layer on the surface of the Au nanoparticles. The absorption curves for the proposed LSPR biosensor are analyzed and compared with the conventional biosensors without MoS 2 /graphene. By optimizing the structure of the sensor, we find that the sensitivity as high as 360 nm/RIU can be achieved with 8-layers of MoS 2 and 10-layers of graphene. In addition, we show that the sensitivity can be controlled by changing the number of the monolayer of MoS 2 and/or graphene. Finally, we show that this sensor can detect successfully impure water after absorption of target single-stranded DeoxyriboNucleic Acid (ssDNA) biomolecules.

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“…In both water and organic solvents, they spontaneously form a very stable pseudorotaxane host-guest complex (schematically shown in Figure 1). Its dissociation can, however, be reversibly triggered by different external stimuli, such as heat, electrochemical oxidation/reduction, [5] or the addition of competitive guest molecules. [2,6] When these units are covalently attached to polymer chains, their characteristic responsive capacities are imparted to the resulting material.…”

Section: Doi: 101002/marc201800455mentioning

confidence: 99%

“…In both water and organic solvents, they spontaneously form a very stable pseudorotaxane host–guest complex (schematically shown in Figure ). Its dissociation can, however, be reversibly triggered by different external stimuli, such as heat, electrochemical oxidation/reduction, or the addition of competitive guest molecules …”

Section: Emulsion Polymerizations Of Styrene In the Presence Of Macromentioning

confidence: 99%

Polymer Nanospheres with Hydrophobic Surface Groups as Supramolecular Building Blocks Produced by Aqueous PISA

Ebeling

Belal

Stoffelbach

et al. 2018

Macromol. Rapid Commun.

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A robust and straightforward synthesis of waterborne polymer nanospheres bearing the supramolecular association unit dialkoxynapthalene at their surface is presented using polymerization-induced self-assembly (PISA). A RAFT agent bearing this unit is first employed to produce poly(acrylic acid) chains, which are then chain-extended with styrene (S) to spontaneously form the nano-objects via RAFT aqueous emulsion polymerization. The particular challenge posed by the dialkoxynapthalene hydrophobicity can be overcome by the use of PISA and the deprotonation of the poly(acrylic acid). At pH = 7, very homogeneous latexes are obtained. The particle diameters can be tuned from 36 to 105 nm (with a narrow particle size distribution) by varying the molar mass of the PS block. The surface accessibility of the dialkoxynapthalene moieties is demonstrated by complexation with the complementary host cyclobis(paraquat-p-phenylene) (CBPQT · Cl ), highlighting the potential of the nanospheres to act as building blocks for responsive supramolecular structures.

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Optical and electrochemical properties of tunable host–guest complexes linked to plasmonic interfaces

Cited by 19 publications

References 62 publications

Sensing using localised surface plasmon resonance sensors

Sensing using localised surface plasmon resonance sensors

MoS2–graphene hybrid nanostructures enhanced localized surface plasmon resonance biosensors

Polymer Nanospheres with Hydrophobic Surface Groups as Supramolecular Building Blocks Produced by Aqueous PISA

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