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.
Results
Showing 1 to 17 of 17 for “"Gold Nanoclusters"”.
-
Synthesis, characterization, and application of magnetic gold nanoclusters
… reproducible synthesis of magnetically active gold nanoclusters (MGNCs) with average particle sizes under 100 nm. This synthesis has two appealing features: (1) the synthesis is conducted entirely in water, with no amphiphilic surfactants that require subsequent removal, and (2) the chemical …
-
Optical properties and biological applications of fluorescent gold nanoclusters
As a novel fluorescent nanomaterial, fluorescent gold nanoclusters (AuNCs) possess numerous exceptional characteristics compared with other luminescent materials such as good water-solubility, high photostability, large Stokes shift, ultrasmall size, nontoxicity, and good biocompatibility. Despite …
-
EXPLORING MITOCHONDRIAL AND REDOX VULNERABILITY IN FRIEDREICH'S ATAXIA USING GOLD NANOCLUSTERS IN HUMAN CELLULAR MODELS
… of disease biology. In this study, we employed gold nanoclusters (Au8-pXs), endowed with redox-active properties, as an exploratory tool to interrogate mitochondrial and oxidative stress-related pathways across different cellular models of FRDA. Patient-derived peripheral blood mononuclear cells …
-
Development of Gold Nanocluster-Based Biosensors
Gold nanoclusters possess both theoretical and practical importance in the development of ultrasensitive biosensors based on surface-enhanced Raman spectroscopy (SERS). Manipulation of gold nanoclusters in a predictable and reproducible manner for the application of refined biochemical analysis …
-
Fundamental research into gold nanocluster properties
Gold materials are popular for research into many applications with their interesting properties, such as magnetism, bio-inactivity, and other size-dependent properties. As the size of the gold material decreases from a bulk material to the nanoscale, new properties are introduced moving through …
-
Radiofrequency heating of nanoclusters and nanoparticles for enzyme activation
… enzyme, thermolysin, covalently attached to gold coated iron oxide nanoparticles (6.1 nm in core diameter). Thermolysin activity was a function of applied radiofrequency power, independent of bulk solution temperature. Besides iron oxides, many other inorganic nanomaterials have been …
-
Syntheses of biocompatible luminescent nanocrystals for visible and short-wave infrared imaging applications
… Our study found that the emission of luminescent gold nanoclusters can be tuned from the visible to the SWIR region by proper selection of ligands and post ligand modifications. The SWIR-emitting gold nanoclusters have a good QY, a HD that is small enough that they exhibit a rapid renal clearance, …
-
TOWARD UNDERSTANDING THE FUNDAMENTALS IN THE SYNTHESIS OF METAL NANOCLUSTERS
Gold nanoclusters (Au NCs) are ultrasmall particles with the core size less than 2 nm. This size regime is in the transition from a single gold atom to a gold nanoparticle (Au NP). The general synthesis method of Au NCs is adpated from Brust method, where thiolate ligand is first mixed with Au(III) …
-
CHARACTERIZATION OF INDIVIDUAL CHARGED Au25(SG)18 CLUSTERS AND THEIR ENHANCEMENT OF SINGLE MOLECULE MASS SPECTROMETRY
… to detecting and characterizing individual gold nanoclusters (Au25(SG)18) in an aqueous solution with nanopore-based resistive pulse sensing. We also present a new application where the clusters are shown to increase the mean residence time of polyethylene glycol (PEG) molecules within an …
-
Surface Engineering for Microsensing
… nanotubes were successively deposited on a gold film by simple chemical adsorption. In an alternative route the acid-treated carbon nanotubes were deposited on a 2-aminoethanethiol modified gold film by means of an external electric field. Gold nanoparticles were then bonded to the nanotubes …
-
Evaluating optical nonlinearities and applications of photonic nanomaterials
… Transition Metal Dichalcogenides (TMD’s), Gold Nanoclusters (AuNC’s), Graphene Quantum Dots (GQD’s), and NaNbO3 nanocrystals, using the techniques of Z-Scan, and Hyper-Rayleigh Scattering (HRS) and a random laser application was performed. Interesting properties have been found in TMD’s. A …
-
Bio-Nano Interfaces: Enzyme Immobilization for Biomimetic Energy Harvesting
… covalently bonded to diazonium salt modified gold surfaces through carbodiimide chemistry creating a brush-type nanotube alignment. Having CNTs ordered in this nature developed a highly ordered structure with markedly high surface area that allowed for the attachment of protein/DNA assembly. …
-
Lysozyme encapsulated gold nanocluster for studying protein denaturation
… aggregation is needed. Lysozyme-encapsulated gold nanoclusters (Lyz-AuNCs) have interesting fluorescence properties that can be used in a variety of fluorescence measurement techniques and maybe a promising tool for studying protein denaturation. So far, studies of the fluorescence …
-
Ultrafast and Nonlinear Spectroscopy of Colloidal Nanomaterials
… the growth of a silver shell on the surface of gold nanoparticles in real time. Additionally, gold-silver-gold core-shell-shell nanoparticles possess extinction peak wavelengths that can be controlled over the visible and near-infrared regions and enhanced photothermal effect. Transient …
-
Multifunctional Hybrid Theranostic Nanoplatforms for Cancer Imaging and Therapy
… we developed new near-infrared fluorescent gold nanoclusters (AuNCs) with a small protein-level size of 2 nm. We discovered that AuNCs display a neuron maturation-dependent internalization pattern, showing stronger signals in mature neurons than in early-stage neurogenesis cells. The high …
-
MMP-7 nanosensors for urine-based detection of chemotherapy-induced senescence and pulmonary fibrosis
… human serum albumin covalently linked to 1.6-nm gold nanoclusters (AuNCs) by MMP-7-cleavable peptides (Chapter 5). When injected intravenously, the nanosensor is cleaved by MMP-7 in senescence-enriched tissues or serum, resulting in the release of AuNCs into urine. Highly sensitive and rapid …
-
Competitive Nucleation in Nanoclusters
… molecular dynamic simulations have shown that nanoclusters, at the same initial conditions, freeze to different structures through a competitive process. Understanding the mechanism of nucleation requires the knowledge of the reaction coordinate, which consists of a set of variables that …