Ultrasensitive Sensors Based on Plasmonic Nanoparticles

Göktürk, İlgım; Denizli, Fatma; Özgür, Erdoğan; Yılmaz, Fatma

doi:10.1002/9783527830343.ch10

Cited by 2 publications

(1 citation statement)

References 115 publications

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“…Among others, one reason is that their small size supports efficient interfacing of the materials with organic hosts with similar molecular dimensions. However, technological applications of small Au NPs, in particular in the field of medical imaging, [22–25] biomedical applications, [11,12,26] analytic detection, [27–29] surface imaging, [30,31] materials with improved conductivity [32–34] of electrical signals transferring, [35,36] or some fluorescent materials, [24,37,38] are limited by the lack of strong plasmonic properties of particles that are smaller than few nanometers in diameter. Combining small size and plasmonics properties in Au NPs is thus a challenge worth the effort.…”

Section: Introductionmentioning

confidence: 99%

Tuneable Plasmonic Resonances Of A Dynamic Thin Film Of Ultrasmall Nanocrystals Modified In the Anti‐Galvanic Reduction Process

Kołodziej,

Szostak,

Tomczyk

et al. 2023

Chemistry A European J

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Ultrasmall gold nanoparticles (NPs) have revolutionized nanotechnology as they are an excellent starting substrate for the synthesis of organic‐inorganic hybrid materials with photonic or energy conversion applications, often with a responsive nature. However, ultrasmall NPs do not sustain plasmonic resonances, preventing their use in plasmon‐related applications. In the presented work, we show a method of chemical modification of ultrasmall gold nanoparticles in order to fabricate dynamically controlled plasmonic thin films. For this purpose, we used the Anti‐Galvanic Reduction process (AGR) to modify the surface of small gold nanoparticles, inducing plasmonic properties without notable size increases. Au@Ag NPs are then modified with liquid crystal‐like organic ligands. The obtained NPs can assemble into densely packed films with long‐range order and temperature‐dependent structural properties. Namely, we detect two, fully reversible phase transitions between the hexagonal and cubic symmetries. The combination of AGR and organic surface modifications enabled us to demonstrate the possibility of managing plasmonic properties in the thin film of ~2 nm diameter metallic NPs.

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Section: Introductionmentioning

confidence: 99%

Tuneable Plasmonic Resonances Of A Dynamic Thin Film Of Ultrasmall Nanocrystals Modified In the Anti‐Galvanic Reduction Process

Kołodziej,

Szostak,

Tomczyk

et al. 2023

Chemistry A European J

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Photonic silver iodide nanostructures for optical biosensors

Aslam,

Nusrat,

Mansour

et al. 2024

Explor BioMat-X

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Silver iodide (AgI) nanostructures have been considered as promising candidates for optical biosensors owing to their optical characteristics of optical properties, including tunable surface plasmon resonance (SPR) and fluorescence enhancement. Such properties let one analyze biomolecules with high sensitivity, which makes them ultra-useful in diagnostics. The formed AgI nanostructures can be synthesized using chemical precipitation and template methods that enable fine-tuning of the morphology and crystallinity of the final nanostructure. The presence of SPR enhances optical signals potentially, and fluorescence enhancement helps visualize biomolecule interactions easier as the analyte concentration is usually low. Such uses of biosensors include applications in proteins, nucleic acids, and other biomolecules for progress in disease diagnosis and pharmacogenomics. Moreover, the good biocompatibility level of the created AgI nanostructures makes it possible to integrate them into biological systems safely, increasing their usage in medicine. This integration of their appealing optics, biosensing operating principles, and biocompatibility establishes their centrality in the creation of future photonic biosensors for faster, intuitive, and painless detection.

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Ultrasensitive Sensors Based on Plasmonic Nanoparticles

Cited by 2 publications

References 115 publications

Tuneable Plasmonic Resonances Of A Dynamic Thin Film Of Ultrasmall Nanocrystals Modified In the Anti‐Galvanic Reduction Process

Tuneable Plasmonic Resonances Of A Dynamic Thin Film Of Ultrasmall Nanocrystals Modified In the Anti‐Galvanic Reduction Process

Photonic silver iodide nanostructures for optical biosensors

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