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Showing 1 to 12 of 12 for “"Plasmon coupling"”.
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Controlling Plasmon Coupling in Biomolecule-Linked Nanoparticle Assemblies
<p>Molecular control of plasmon coupling is investigated in biomolecule-linked nanoparticle assemblies in two-particle, small cluster, and extended network formats. The relationship between structure and optical properties is explored through comparison of measured spectra with simulated spectra …
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Probing cell membrane dynamics using plasmon coupling microscopy
… This approach, which is referred to as plasmon coupling microscopy (PCM), utilizes the distance dependent near-field coupling between noble metal nanoparticle (NP) labels to resolve close contacts on the length scale of approximately one NP diameter. We firstly utilize this PCM strategy …
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Design and characterization of colorimetric plasmonic nanostructures for imaging and sensing
… techniques has attracted huge interest in plasmon-based optical sensors, which can detect small concentrations of chemical and bio-analytes that are not detectable by the conventional analytic optical tools. Advances in nanofabrication techniques have driven in-depth understanding of …
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Raman Scattering in GaN and ZnO
… E2H and A1(LO) phonon modes, biaxial stress and plasmon coupling of the Al(LO) mode are observed and compared to a bulk GaN sample. The stress-related shift rate for the AI(LO) mode in hexagonal GaN is established to be 2.7 ± 0.4 cm-1/GPa through series of GaN with low free carrier concentration. …
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A chemical sensor based on surface plasmon resonance on surface modified optical fibers
… which utilizes the phenomenon of surface plasmon resonance to detect changes in refractive index of chemical or biochemical samples applied to a surface modified optical fiber. The sensor is constructed by polishing a short section of the lateral surface of an optical fiber to its …
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Development of Universal Biosensing Platforms Based on CRISPR/Cas12a systems
… were developed. The first developed method is a plasmonic CRISPR Cas12a assay for colorimetric detection of viral nucleic acid. This assay generates colorimetric signals for nucleic acid amplicons by combining the unique target-induced collateral cleavage activity of Cas12a with plasmon coupling …
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Self-assembly of inorganic nanoparticle amphiphiles for biomedical applications
… novel collective properties ─ arising from the coupling between NPs ─ that can be radically different from individuals. Realizing the enormous potential of NPs in biomedical applications requires the organization of NPs into hierarchically ordered structures. My dissertation is focused on the …
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Temporal dynamics of hot-electrons in metal films and alloys
When light is coupled into a surface plasmon mode, it can either decay radiatively by emitting a photon or non-radiatively by transferring its energy to charge carriers with excessive kinetic energy, also known as the “hot-carriers.” The photogenerated hot-carriers are promising for applications …
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Plasmonic Paper as a Novel Chem/Bio Detection Platform
… of such oscillation, termed localized surface plasmon resonance (LSPR), falls into the visible spectral region for noble metals such as gold, silver and copper. LSPR of metal nanostructures is sensitive to numerous factors such as composition, size, shape, dielectric properties of surrounding …
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Ordering of Nanoparticles by Wrinkle-Assisted Self-Assembly : Controlling Plasmonic Coupling Effects
… spectral features because of inter-nanoparticle coupling. These effects are often the result of changes in the so-called surface Plasmon resonance, the frequency at which conduction electrons oscillate in response to the alternating electric field. Provided nanoparticles form ordered arrays, they …
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Crescita epitassiale e caratterizzazione di un epi-layer spesso di 4H-SiC per la rivelazione di neutroni
Lo scopo di questo lavoro si è incentrato sulla caratterizzazione spettroscopica di uno spesso strato epitassiale di SiC 4H, precedentemente cresciuto, e un confronto dei risultati tra i campioni prima e dopo un processo di ossidazione termica effettuato a 1400 C per 48 ore. Attraverso …
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Design snd Manipulation of Plasmonic Nanoparticles: Fundamentals, Dynamics, and Applications in Sensing snd Spectroscopy [Design e Manipolazione delle Nanoparticelle Plasmoniche: Fondamenti, Dinamiche e Applicazioni nella Sensoristica e nella Spettroscopia]
… metalli nobili sono il risultato della risonanza plasmonica superficiale localizzata (LSPR), un fenomeno che consiste nell’oscillazione collettiva degli elettroni liberi confinati in un piccolo volume. L’obiettivo di questa tesi è quello di studiare le proprietà ottiche delle NPs di oro e …