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 33 for “"Plasmonic nanoparticles"”.
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Photothermal energy conversion by plasmonic nanoparticles
… when designing optically active devices based on plasmonic nanoparticles. Many early applications of these nanoparticles, like photothermal tumor ablation, drug delivery, and microfluidic devices, depend on the conversion of light to heat. In this dissertation, we compare three nanoparticle …
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Interaction of azobenzene containing surfactants with plasmonic nanoparticles
… how to introduce and combine simultaneously plasmonic and photoswitching properties to different nano-objects. In this thesis I investigate the complexes between noble metal nanoparticles and cationic surfactants containing azobenzene units in their hydrophobic tail, employing absorption …
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Spectroelectrochemical, Separation and Surface Functionalisation Studies of Plasmonic Nanoparticles
Plasmonic nanoparticles are of significant research interest due to their enhanced light-matter interactions, demonstrating great potential for a range of applications from sustainable sun-driven photochemistry to therapeutics and sensitive biological sensors. These properties arise from localised …
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Engineering Application-Specific Plasmonic Nanoparticles: Quantitative Measurements and Precise Characterization
Nobel metal nanoparticles that exhibit plasmon resonances in the visible and near infrared have been of great interest in recent years. Strong light-matter interactions on the nanoscale have a range of interesting properties that may be useful in applications in medicine, sensing, solar energy …
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Optically Active Metamaterials Made of Plasmonic Nanoparticles and Chitin Nanocrystals
… optically active metamaterials composed of plasmonic nanoparticles embedded in a helicoidal architecture made of chitin nanocrystals, and to understand how the material interact with light to generate macroscopic circular dichroism. The material fabrication was based on a unique …
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Computational approaches to understanding structure-property relationships in single plasmonic nanoparticles
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Thin-Film Polymer Nanocomposites Composed of Two-Dimensional Plasmonic Nanoparticles and Graphene
Plasmonic polymer nanocomposites contain plasmonic nanoparticles that are dispersed within a polymer. The polymer matrix strongly influences the optical properties of plasmonic nanoparticles. It is imperative to understand the interaction between plasmonic nanoparticles and polymers so that one can …
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PLASMONIC NANOPARTICLES AS VERSATILE NANORULERS FOR SENSING APPLICATIONS: DEVELOPING THE NANOPARTICLE-ON-MIRROR ARCHITECTURE
The basis of plasmonic sensors is the resonant coupling between the oscillations of free electrons, called plasmons, and incident visible light waves. By confining these oscillations within a nanostructure, the coupling efficiency is enhanced by the creation of localized surface plasmon resonant …
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Tailored Optical Properties on the Macroscale by Template-Assisted Self-Assembly of Plasmonic Nanoparticles
… via controlled hierarchical surface-assembly of plasmonic nanoparticles. The fundamental concept pursued in this thesis can be divided into three sub-goals that are addressed in individual publications: (I) controlled large-scale synthesis of nanoscale building blocks, (II) organization of these …
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Design of Cotton Fabric-Based Binary and Ternary Composite Materials Containing Nanostructured ZnO, TiO2, and Plasmonic Nanoparticles: Photocatalytic Applications
… photocatalytic coatings. Semiconductor and metal nanoparticles in heterogeneous systems have gained wide recognition in recent years because of their morphology-dependent electronic properties and their ability to integrate on various materials to improve functionality. Metal oxides, such as …
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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 …
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Deep Learning and Optimised Nanoplasmonic Sensors for Label-free Biomedical Applications
… and numerical approach for the investigation of plasmonic nanostructures: I have developed two methods for investigating plasmonic nanoparticles, including a semi-analytical approach and a fully numerical one. Both methods use spatial isomorphism to deal with curved boundaries and introduce an …
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Surface plasmon enhanced fluorescence for biological imaging : from visible to short-wave infrared
… of M13 virus and co-assembling plasmonic nanoparticles and visible dye molecules on the viral capsid. Practical factors controlling fluorescence enhancement, such as nanoparticle size and dye-to-nanoparticle distance, are studied in this project. Lastly, the highly fluorescent …
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Extraordinary light-induced local field, angular momentum and force near metallic nanoparticles
… enhanced spectroscopies, a major focus of plasmonics research over the past decade. Here we show several different nanoantennas for SEIRA detection, which exhibit an order of magnitude greater SEIRA sensitivity than previous record-setting designs. We also consider that plasmonic …
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Detection of trace concentrations of small and big molecules through vibrational spectroscopy
… Signal enhancement in SERS occurs near plasmonic nanoparticles within "hotspots" (<10 nm), which limits detection to molecules that can access these regions. We investigated two differently fabricated SERS-active substrates: pulsed laser deposited gold nanoparticles and electrochemically …
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Unlocking single molecule detection sensitivities in surface-enhanced Raman spectroscopy
… uniform fabrication of sub-5nm gaps between plasmonic nanoparticles over large areas. For this purpose, researchers have employed ultra-precise fabrication techniques like electron-beam lithography that offer very high resolution, but suffer from low throughput. This thesis proposes a novel …
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Exploiting plasmons to sense interfacial changes at the nanoscale
… materials development. As a class of materials, plasmonic nanomaterials are a promising approach for probing chemistry at interfaces. When excited with an incident electric field like light, plasmonic nanomaterials exhibit localized surface plasmon resonances (LSPR). The LSPR scattering spectrum …
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Untangling energy dependent radiation damping and chemical interface damping in gold nanorods
Plasmonic metal nanostructures have long been investigated for their use in light harvesting and sensing applications. It may be more favorable to enhance either radiative or non-radiative effects that arise after plasmon decay depending on the intended application. Therefore, understanding the …
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Plasmonic hot carrier-driven electrochemistry
… in photocatalysts, including systems based on plasmonic metal nanoparticles. To take advantage of these materials, a fundamental understanding of how plasmon-induced hot-carriers drive chemical reactions is needed. This work examines how different hot carrier distributions affect …
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