27 Result(s)
within
Catherine J. Murphy
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Article
Open AccessVisualizing ultrafast photothermal dynamics with decoupled optical force nanoscopy
The photothermal effect in nanomaterials, resulting from resonant optical absorption, finds wide applications in biomedicine, cancer therapy, and microscopy. Despite its prevalence, the photothermal effect in ...
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Article
Open AccessLarge scale self-assembly of plasmonic nanoparticles on deformed graphene templates
Hierarchical heterostructures of two-dimensional (2D) nanomaterials are versatile platforms for nanoscale optoelectronics. Further coupling of these 2D materials with plasmonic nanostructures, especially in no...
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Article
Open AccessGold nanoparticles disrupt actin organization and pulmonary endothelial barriers
This study explored the impact of gold nanoparticles on the metabolic activity and morphology of human pulmonary endothelial cell monolayers. We developed a gold nanoparticle library of three different sizes a...
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Article
A golden time for nanotechnology
Gold nanoparticles (AuNPs) are one of the most versatile and accessible classes of nanomaterials. Their chemical stability, ease of colloidal synthesis, surface functionalization, and plasmonic resonance—tunab...
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Article
Metagenomic analysis of microbial communities yields insight into impacts of nanoparticle design
Next-generation DNA sequencing and metagenomic analysis provide powerful tools for the environmentally friendly design of nanoparticles. Herein we demonstrate this approach using a model community of environme...
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Open AccessInfluence of gold nanoparticle surface chemistry and diameter upon Alzheimer’s disease amyloid-β protein aggregation
Deposits of aggregated amyloid-β protein (Aβ) are a pathological hallmark of Alzheimer’s disease (AD). Thus, one therapeutic strategy is to eliminate these deposits by halting Aβ aggregation. While a variety o...
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Article
Patchy silica-coated silver nanowires as SERS substrates
We report a class of core–shell nanomaterials that can be used as efficient surface-enhancement Raman scattering (SERS) substrates. The core consists of silver nanowires, prepared through a chemical reduction ...
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Protocol
High-Aspect-Ratio Gold Nanorods: Their Synthesis and Application to Image Cell-Induced Strain Fields in Collagen Films
Gold nanoparticles are receiving considerable attention due to their novel properties and the potential variety of their uses. Long gold nanorods with dimensions of approximately 20 × 400 nm exhibit strong lig...
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The Early Life of Gold Nanorods: Temporal Separation of Anisotropic and Isotropic Growth Modes
Gold nanorods (AuNRs) are a particularly interesting class of nanomaterials because their dimensions and size-dependent optical properties make them ideally suited for many applications. AuNRs are typically sy...
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Article
Tuning of size and shape of Au–Pt nanocatalysts for direct methanol fuel cells
In this article, we report the precise control of the size, shape, and surface morphology of Au–Pt nanocatalysts (cubes, blocks, octahedrons, and dogbones) synthesized via a seed-mediated approach. Gold “seeds...
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Article
Metallic Nanoantennae and their Use in Organic-Polymer Photovoltaics
The potential of gold nanorods to act as “antennae” in organic photovoltaic devices and improve performance by enhancing the optical field within the device has been examined. Gold nanorods were blended into t...
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Article
Open AccessToxicity and cellular uptake of gold nanoparticles: what we have learned so far?
Gold nanoparticles have attracted enormous scientific and technological interest due to their ease of synthesis, chemical stability, and unique optical properties. Proof-of-concept studies demonstrate their bi...
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Article
Transfer of gold nanoparticles from the water column to the estuarine food web
Within the next five years the manufacture of large quantities of nanomaterials may lead to unintended contamination of terrestrial and aquatic ecosystems1. The unique physical, chemical and electronic properties...
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Article
Synthesis and Characterization of Silver–Platinum Bimetallic Nanowires and Platinum Nanotubes
A galvanic replacement reaction was used to prepare silver–platinum bimetallic nanowires and platinum nanotubes. Silver nanowires, prepared by boiling aqueous silver nitrate with sodium citrate in the presence...
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Chapter
Diffusion Linked Solidification Model of Axisymmetric Growth of Gold Nanorods
Colloidal gold nanospheres have been used in a variety of applications since the Middle Ages, when artisans blended tissue paper thin gold sheets into molten glass, creating stained glass panels with rich ruby...
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Article
Open AccessFocusing on the essentials: learning for performance
As The World health report 2006 emphasized, there is increasing consensus that training programmes should focus on "know-how" instead of "know-all." Health workers need to know how to do the job they will be expe...
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Article
Plasmons spring into action
The integration of semiconducting nanowires and metallic nanoparticles in a single device leads to a biosensor with enhanced sensitivity that detects molecules over a broad range of concentrations.
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Article
Surfactant-Directed Synthesis and Optical Properties of One-Dimensional Plasmonic Metallic Nanostructures
One-dimensional metallic nanostructures such as nanorods and nanowires are of tremendous interest for electronic, sensing, and catalytic applications. Shape anisotropy introduces new optical properties in gold...
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Protocol
Probing DNA Structure With Nanoparticles
Semiconductor nanoparticles, also known as quantum dots, are receiving increasing attention for their biological applications. These nanomaterials are photoluminescent and are being developed both as dyes and ...
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Article
Optical Detection of Thymine Dinucleoside Monophosphate and Its cis-syn Photodimer by Inorganic Nanoparticles
The Watson-Crick DNA double helix is an averaged ideal of multitudinous natural sequence-directed local structural deviations. By effectively derailing normal cellular physiological processes, damaged bases ca...
