An Integrated Approach Toward Understanding the Environmental Fate, Transport, Toxicity, and Health Hazards of Nanomaterials

Pettibone, John M.; Elzey, Sherrie; Grassian, Vicki H.

doi:10.1002/9780470396612.ch3

Cited by 7 publications

(4 citation statements)

References 77 publications

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“…In aqueous environments and as aerosol, there is a tendency for nanoparticles to form aggregates that are much larger than the primary size of the nanoparticle. The tendency for nanoparticles to aggregate depends on a number of factors including surface functionalization, nanoparticle concentration, pH, and ionic strength.…”

Section: Physical and Chemical Properties Of Nanoparticles − General ...mentioning

confidence: 99%

When Size Really Matters: Size-Dependent Properties and Surface Chemistry of Metal and Metal Oxide Nanoparticles in Gas and Liquid Phase Environments

2008

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It is clear if one peruses the pages of The Journal of Physical Chemistry and other journals of the American Chemical Society that in the years around the beginning of the twenty first century, and in particular the year two thousand eight, there is a great deal of interest in the physical chemistry of nanoparticles. In this article, the focus is on some of the interesting and often not well understood size-dependent properties and surface chemistry of metal and metal oxide nanoparticles in gas and liquid phase environments. Challenges that remain and suggestions for future research needs are also presented at the end of this article. † This year marks the Centennial of the American Chemical Society's Division of Physical Chemistry. To celebrate and to highlight the field of physical chemistry from both historical and future perspectives, The Journal of Physical Chemistry is publishing a special series of Centennial Feature Articles. These articles are invited contributions from current and former officers and members of the Physical Chemistry Division Executive Committee and from J. Phys. Chem. Senior Editors.

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Section: Physical and Chemical Properties Of Nanoparticles − General ...mentioning

confidence: 99%

When Size Really Matters: Size-Dependent Properties and Surface Chemistry of Metal and Metal Oxide Nanoparticles in Gas and Liquid Phase Environments

2008

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“…To evaluate the agglomerate evolution, the agglomerate volume equivalent diameter, d ve , is chosen. The agglomerate volume equivalent diameter is defined as the volume of a sphere with the same volume as a particle with an irregular shape (Pettibone et al 2008) and is expressed as…”

Section: Particle Formationmentioning

confidence: 99%

Impact of Reaction Chamber Geometry on the Particle-Residence-Time in Flame Spray Process

Buss

Noriler

Fritsching

2020

Flow Turbulence Combust

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Production of functional nanoparticles and nanoscaled powders is a key process in several recent industrial applications. In this work, the flame process in nanoparticle production in sprays is analyzed. Specific focus is on the flow behavior, the temperature distribution, and the residence-time of particles in the hot (reactive) regions in a flame spray reactor that are analyzed by numerical simulations using computational fluid dynamics techniques. The role of the co-flowing gas rate provided to the flame spray reactor and its effects on the spray behavior, flame morphology, and particle properties in an enclosed atmosphere is highlighted. The influence of different operational conditions on the reactor temperature and temperature-residence-time distribution of gas and particles is investigated. It is found that providing a reduced co-flowing gas rate to the flame spray reactor favors the recirculation of hot gas, and, consequently increases the residence-time of particles in the high-temperature regions. The numerical results of particle diameter and gas-phase temperature are compared to some existing experimental data.

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“…The anti-oxidative effect of green synthesized Ag-NPs on DPPH is thought to be due to their hydrogen donating capability [23]. As DPPH is a familiar as lipophilic radical, this readily accepts electron from the antioxidant materials and converts its colour from violet to yellow.…”

Section: Antioxidant Activity Of Ag-npsmentioning

confidence: 99%

Root Extracts (<i>Gymnadenia orchidis</i> Lindl) Facilitated Rapid Synthesis of Fluorescent Silver Nanoparticles (Ag-NPs) for Various Biological Applications

Show¹,

Ghosal²,

Chattopadhyay³

2017

JBNB

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One pot rapid and green bio-synthesis of stable fluorescent silver nanoparticles (Ag-NPs) from silver nitrate solution using root extract of Gymnadenia orchidis Lindlat at ambient temperature is demonstrated productively. Surface Plasmon resonance of the synthesized Ag-NPs was shown to occur at 439 nm and two sharp fluorescence peaks at 610 and 780 nm were observed. FTIR study publicized the presence of chemically functional groups in the root extract surrounding the Ag-NPs, acting as stabilizers. XRD and FESEM analysis revealed that Ag-NPs were face centred cubic structure being spherical in shape with an average particle size of 28 ± 2 nm (n = 100). The stability of Ag-NPs in neutral pH environment was confirmed by Zeta Potential (ζ) behaviour. The Ag-NPs showed superior antioxidant activity. The notable photo-catalytic activity of biosynthesized Ag-NPs attributed to the existence of some proteins, responsible for degradation of methylene blue dye. Furthermore, Ag-NPs were found to exhibit a significant antibacterial effect against gram positive Staphylococcus aureus (S. aureus) bacteria.

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An Integrated Approach Toward Understanding the Environmental Fate, Transport, Toxicity, and Health Hazards of Nanomaterials

Cited by 7 publications

References 77 publications

When Size Really Matters: Size-Dependent Properties and Surface Chemistry of Metal and Metal Oxide Nanoparticles in Gas and Liquid Phase Environments

When Size Really Matters: Size-Dependent Properties and Surface Chemistry of Metal and Metal Oxide Nanoparticles in Gas and Liquid Phase Environments

Impact of Reaction Chamber Geometry on the Particle-Residence-Time in Flame Spray Process

Root Extracts (<i>Gymnadenia orchidis</i> Lindl) Facilitated Rapid Synthesis of Fluorescent Silver Nanoparticles (Ag-NPs) for Various Biological Applications

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An Integrated Approach Toward Understanding the Environmental Fate, Transport, Toxicity, and Health Hazards of Nanomaterials

Cited by 7 publications

References 77 publications

When Size Really Matters: Size-Dependent Properties and Surface Chemistry of Metal and Metal Oxide Nanoparticles in Gas and Liquid Phase Environments

When Size Really Matters: Size-Dependent Properties and Surface Chemistry of Metal and Metal Oxide Nanoparticles in Gas and Liquid Phase Environments

Impact of Reaction Chamber Geometry on the Particle-Residence-Time in Flame Spray Process

Root Extracts (&lt;i&gt;Gymnadenia orchidis&lt;/i&gt; Lindl) Facilitated Rapid Synthesis of Fluorescent Silver Nanoparticles (Ag-NPs) for Various Biological Applications

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Product

Resources

About

Root Extracts (<i>Gymnadenia orchidis</i> Lindl) Facilitated Rapid Synthesis of Fluorescent Silver Nanoparticles (Ag-NPs) for Various Biological Applications