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 29 for “"Gold nanorod"”.
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Gold nanorod based nanoprobes for biomedical applications
Small gold nanorods (SGNRs) are nanorods that are ~13-50 nm in length and less than 10 nm in diameter. The SGNRs manifest excellent optical properties arising from localised surface plasmon resonance including strong optical absorption and scattering tunable from the visible to the infrared region …
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Toward spatial control of gold nanorod surface functionalization
Gold nanorods (GNRs) show much promise for applications in biological, optoelectronic and energy applications. The resonant generation of a localized surface plasmon resonance (LSPR) at the GNR surface results in interesting optical properties and unique interactions with molecules. Combined with …
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Creation of novel gold-nanorod-based localized surface plasmon resonance biosensors
… studies on the development of a novel sensitive gold nanorod (GNR) based label-free LSPR optical fibre biosensor, and the development of a novel robust method for effectively modifying the surface of cetyl-trimethyl ammonium bromide (CTAB) capped GNRs and their LSPR biosensing applications. A …
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Gold nanorod surface functionalization: construction of dynamic surfaces and heterogeneous silica coating
Gold nanorods (GNRs) have been investigated due to their unique surface plasmon resonances (SPR) that are tunable in wavelength according to nanoparticle shape. The collective oscillation of the electrons in the GNRs excited by incoming light leads to enhanced electromagnetic fields near the gold …
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Molecular engineering of gold nanorod surfaces: towards improved physical properties and understanding nanoparticle-cell interactions
"Gold nanorods have unique optical properties and various promising applications. Wet chemical synthesis of gold nanorods requires the use of cetyl trimethylammonium bromide (CTAB) as shape-directing surfactant, which form a bilayer on the surfaces of gold nanorods. CTAB bilayer stabilizes the …
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Development of a plasmon resonance enhanced optical trap for characterisation of single metal nanoparticle
… for constructing a plasmon resonance based gold nanorod trapping platform and suggest methods for characterizing a trapped single nanoparticle. While there are published methods that emphasize on building up an optical trapping setup or trap single gold nanorod using high power lasers, none …
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NANOCOMPOSITES CONTAINING GOLD NANORODS FOR TWO-PHOTON IMAGING, PHOTODYNAMIC THERAPY AND DRUG DELIVERY
… nanocomposites containing mesoporous silica and gold nanorod are considered as the most highly researched field owing to their novel properties of single-component structures. Gold nanorod is well-known for its large two-photon action cross section (10E4 GM), high two-photon luminescence, …
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Investigating the impact of gold nanoparticles on pulmonary cells: From 2D to 3D culture systems
… properties on the nanoscale. Interest in using gold nanoparticles in biological applications is growing ranging from sensing to cancer therapy due to their tunable sizes and shapes, unique optoelectronic properties, and straightforward surface modification. The advancement of fine-tuning of gold …
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Harnessing the optical properties of gold nanorods: fluorescence enhancement, biosensing and photothermal therapy
… synthesis, characterization, and application of gold nanomaterials, especially gold nanorods. Due to their small size, ease of functionalization, and uniquely tunable optical properties, gold nanorods have potential application in solar cells, sensing, bioimaging, drug delivery, and cancer …
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Synthesis and characterization of metallic nanoparticles with photoactivated surface chemistries
… of nanoparticles. We focused on elongated shaped gold nanorod due to its unique surface plasmon resonance and probable biomedical applications. In this research we formed a dumbbell shape assembly of nanoparticles in suspension. A probable application for these assemblies can be in vivo imaging. …
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Detection of food contaminants by SERS and nanopore technology
… with simplified extraction method and a novel gold nanorod substrate to detect banned aquaculture biocides (malachite green (MG) and crystal violet (CV)) and their mixture (1:1) in aqueous solution and fish samples. PCA results demonstrate that SERS can distinguish MG, CV and their mixture …
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Selective heating of multiple nanoparticles as a new strategy for controlled release applications
… of femtosecond laser pulses on the absorbing gold nanorods provides the answer to this limitation due to the very high-power of energy delivery through these ultrashort pulses. We developed gold nanorod surface customization technique to enable DNA - nanorod conjugation, thus turning gold …
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Plasmonic hot carrier-driven electrochemistry
… of hot carriers. Using hot-hole assisted gold nanorod electro-dissolution as a model system, I demonstrated that oxidation reactions are most efficiently driven by athermal holes in the d-band, rather than less energetic holes in the sp-band. Nanorods exhibited reactive hot-spots for …
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Effects of Geometry on Plasmonic Properties of Nanostructures
… the measurement of self-assembled, twisted gold nanorod dimers. The same method is used to characterize racemically assembled dimers of gold dumbbell shaped particles where individual dimers were shown to have chiral responses, despite no ensemble chiral response. Triangular bifrustrum …
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Investigating Cholesterol Orientation in Lipid Bilayer by Raman Spectroscopy
… key role in animal membrane functions. By using gold nanorods as a substrate, lipid membranes encapsulated the nanorods for the lipid structure to be analyzed by SERS. Optical excitation of gold nanoparticles at their size and shape-dependent plasmon resonant frequency induces strong oscillations …
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Investigating the plasmonic behaviour of gold nanostructured arrays with finite element method modelling for optical sensing applications
… geometry. This work utilises a novel, plasmonic gold nanorod array surface as a sensing platform for diagnostic applications. Biological species were detected through the sensitivity of plasmons to refractive index changes and the binding kinetics were determined. Investigations were Lysozyme, an …
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Electrochemical Evaluation of Surfactants Relevant to Ligand Stabilized Nanoparticles
… of 4-dimethylaminopyridine (DMAP) stabilized gold nanoparticles and (2) Addressing the popular perception concerning the growth mechanism of quaternary ammonium surfactant stabilized gold nanorods. Halide induced aggregation of DMAP monolayer protected gold nanoparticles is investigated by …
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Probing light-matter interactions with differential polarizations: From chiral nanostructures to molecular sensing
… chiral biomolecules. Using DNA-origami templated gold nanorod dimers, we apply single-particle circular differential scattering to probe nanoscale chirality. Supported by electron microscopy and electromagnetic simulations, our study reveals that the presence of a substrate imposes different …
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Metal Nanoparticles Deposition On Biological And Physical Scaffolds To Develop A New Class Of Electronic Devices
… that it could bend a 400 nm long and 25 nm wide gold nanorod. Once the device is built, the hygroscopic scaffolds were actuated by humidity, to modulate the electron tunneling barrier width (or height) between the metallic nanoparticles. A decrease in inter-particle separation by < 0.2 nm or a …
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Quantitative Anisotropy Imaging based on Spectral Interferometry
… birefringence spectroscopy measurement over gold nanorod particles on glass substrate demonstrates that the proposed system can simultaneously determine the polarizability-induced birefringence orientation, as well as the scattering intensity and the phase differences between major/minor axes …
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