Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 549 for “"plasmon"”.
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Plasmon-powered Nanochemistry
… starts with an introduction to the fundamental plasmonic properties of metal nano-architectures, followed by various self-assembly strategies I explored to form controlled plasmonic aggregates. I then discuss in detail how these structures can be combined with optics to control and probe …
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Exploration of grating-based surface plasmon resonance systems for wave vector matching to enhance plasmon modes and preliminary surface plasmon-enhanced fluorescence interrogation
<p>Surface plasmon resonance refers to the collective oscillation of conductance band electrons in a metal. The most common experimental method to excite surface plasmon resonance is with light through a coupling mode (prism, grating, waveguide, etc). The work presented in this thesis uses …
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Plasmon hybridization in real metals
… as incompressible and irrotational fluid, Plasmon hybridization (PH) method can be used as a very useful tool in interpolating the electric magnetic behaviors of complex metallic nanostructures. Using PH theory and Finite Element Method (FENI), we theoretically investigated the optical …
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Ultrafast Ultra-confined Plasmon Phonon Interactions
… interrogating nanometrically confined ultrafast plasmon-phonon interactions. Nanometric plasmonic confinement is achieved by coupling the charge oscillations of a single gold nanoparticle to a gold substrate. This confines the plasmonic field to the single nanometre gap separating the two and is …
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Particle-modified Surface Plasmon Resonance Biosensor
Surface plasmon resonance (SPR) biosensors have attracted great attention in scientific research in the past three decades. Extensive studies on the immobilisation of biorecognition elements have been conducted in pursuit of higher sensitivity, but trialled formats have focussed on a thin layer …
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Ultrasonic agitation for surface plasmon resonance biosensors
… and ability to yield a localised surface plasmon resonance, surface-based nanoparticles have gained popularity in various biosensing applications. In such configurations, fluid containing biological material such as proteins is injected into a static cell containing the sensing surface. …
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Numerical Study of Plasmon Resonances in Nanoparticles
Surface plasmon resonances in nanoparticles have numerous promising scientific and technological applications in such areas as nanophotonics, near-field microscopy, nano-lithography, biosensor, metamaterial and optical data storage. Consequently, the understanding of plasmon resonances in …
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Light-induced torque at multipolar plasmon resonance
… mechanical effects arising at multipolar plasmon resonance of a subwavelength plasmonic resonator. We perform Finite Difference Time Domain (FDTD) simulation and show that the discrete rotational symmetry of the resonator determines the possible output modes in angular momentum conversion …
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Nanoscale Control of Gap-plasmon Enhanced Optical Processes
Surface plasmon resonances of metal nanostructures have been studied intensely in recent years. The strong plasmon-mediated electric field enhancement and field confinement well beyond the diffraction limit has been demonstrated to improve the performance of optical devices including ultrasensitive …
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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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Plasmon Directed Chemical Reactivity and Nanoparticle Self-Assembly
… one such method of nanoscale construction, the plasmonically directed self-assembly of gold nanospheres onto both silver nanospheroids and gold nanorods. At the heart of this research is a the use of a photocleavable ligand (1-(6-Nitrobenzo[d][1,3]dioxol-5-yl)ethyl(4-(1,2-Dithiolan-3-yl)butyl) …
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Surface plasmon-coupled emission for applications in biomedical diagnostics
Surface plasmon-coupled emission (SPCE) is a phenomenon whereby the light emitted from a fluorescent molecule can couple into the surface plasmon of an adjacent metal layer resulting in highly directional emission in the region of the surface plasmon resonance (SPR) angle. As well as the high …
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Integrated optical surface plasmon resonance for electrochemically addressed layers
… of the first integrated optical surface plasmon resonance sensor that combines an optical and electrochemical interrogating technique in sensing electrochemically addressed layers over a gold film. This device brings together the advantages of the analytical technique of surface plasmon …
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Dynamics of plasmon-induced hot carriers in metallic nanoparticles
Plasmon-induced hot carriers have attracted lots of interests due to the extraordinary applications on hydrogen photocatalysis and solar energy harvesting. Although many great features of hot electrons have been studied through previous works, the generation process and dynamics of them are still …
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Photochemical Tuning of Surface Plasmon Resonances in Metal Nanoparticles
… oscillations (so-called localized surface plasmons or LSPs) which facilitate concentrating light-matter interactions to length scales below the diffraction limit. Part I of this book describes two applications of this confinement effect. Firstly, the use of single particles as optically …
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Investigation of electroactive ultrathin films by surface plasmon spectroscopy
Surface plasmon spectroscopy was combined with electrochemistry and high pressure technique to investigate ultrathin electroactive polymer films. Firstly, the electropolymerization of 2, 2a??-bithiophene was investigated by electrochemical surface plasmon spectroscopy. The anion doping and dedoping …
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Utilizing Hybrid Plasmon Modes to Probe Nanoparticle-Polymer Interfaces
… in real-time, through spatially separated hybrid plasmonic resonances supported by the AgNCs when deposited onto the polymer film, which allowed the determination of a surface layer on top of the bulk polymer with enhanced mobility as well as diffusion constants for the embedding process.
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