Nanotechnology and the Environment

Sellers, Kathleen; Mackay, Christopher S.; Bergeson, Lynn L.; Clough, Stephen R.; Hoyt, Marilyn; Chen, Julie; Henry, Kimberly L.; Hamblen, Jane

doi:10.1201/9781420060225

Cited by 18 publications

(5 citation statements)

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“…One of the advantages of nanotechnology application in textile fibers processing is the increase of possible interactions between different materials, when compared with the fibers processed at a macro scale, since it is possible to produce fibers with a high surface area, thus increasing the contact between them and their surroundings. Thus it can be stated that nanotechnology allows designing and creating new materials with improved physical properties [9,10]. The electrospinning allows obtaining fibers with sizes between 0 and 200 nm.…”

Section: Methodsmentioning

confidence: 99%

Bioactive Nano-Filters to Control Legionella on Indoor Air

Rodrigues

Sousa

Geraldes

et al. 2012

AMR

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Several factors affect the indoor air quality, among which ventilation, human occupancy, cleaning products, equipment and material; they might induce the presence of aerosols (or bioaerosols in the presence of biological components) nitrogen oxides, ozone, carbon monoxide and dioxide, volatile organic compounds, radon and microorganisms. Microbiological pollution involves hundreds of bacteria and fungi species that grow indoors under specific conditions of temperature and humidity. Exposure to microbial contaminants is clinically associated with allergies, asthma, immune responses and respiratory infections, such as Legionnaires Disease and Pontiac Feaver, which are due to contamination byLegionella pneumophila. Legionnaire's Disease has increased over the past decade, because of the use of central air conditioning. In places such as homes, kindergartens, nursing homes and hospitals, indoor air pollution affects population groups that are particularly vulnerable because of their health status or age, making indoor air pollution a public health issue of high importance. Therefore, the implementation of preventive measures, as the application of air filters, is fundamental. Currently, High Efficiency Particulate Air (HEPA) filters are the most used to capture microorganisms in ventilation, filtration and air conditioning systems; nevertheless, as they are not completely secure, new filters should be developed. This work aims to present how the efficiency of a textile nanostructure in a non-woven material based on synthetic textiles (high hydrophobic fibers) incorporating appropriate biocides to controlLegionella pneumophila, is going to be measured. These bioactive structures, to be used in ventilation systems, as well as in respiratory protective equipment, will reduce the growth of microorganisms in the air through bactericidal or bacteriostatic action. The filter nanostructure should have good air permeability, since it has to guarantee minimum flows of fresh air for air exchange as well as acceptable indoor air quality.

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Section: Methodsmentioning

confidence: 99%

Bioactive Nano-Filters to Control Legionella on Indoor Air

Rodrigues

Sousa

Geraldes

et al. 2012

AMR

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“…TEM allows to determine the size, shape and particle structure (crystalline or amorphous) alongwith the elemental composition of NPs. TEM equipped with energy‐dispersive X‐ray spectroscopy and electron energy loss spectroscopy, can provide the elemental composition of NPs and selected‐area electron diffraction can be used to obtain crystal structure of NPs 118 …”

Section: Electron Microscopementioning

confidence: 99%

“…The analysis of nonconductive samples in a wide range of media can also be done using AFM under physiological conditions and, therefore, overcome the limitations where only conducting samples can be imaged 190 . The functioning of AFM is done at ambient pressure with the characterization of a wide range of particle sizes (1 nm to 8 μm) in a single scan 118 . Recently, further advancements have been introduced in AFM technique so as to enhance its applicability and efficacy to probe NP‐cell interactions.…”

Section: Scanning Probe Microscopy: Atomic Force Microscopy (Afm)mentioning

confidence: 99%

Microscopy based methods for characterization, drug delivery, and understanding the dynamics of nanoparticles

Gupta

Rai

Verma

et al. 2023

Medicinal Research Reviews

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Nanomedicine is an emerging field that exploits nanotechnology for the development of novel therapeutic and diagnostic modalities. Researches are been focussed in nanoimaging to develop noninvasive, highly sensitive, and reliable tools for diagnosis and visualization in nanomedical field. The application of nanomedicine in healthcare requires in‐depth understanding of their structural, physical and morphological properties, internalization inside living system, biodistribution and localization, stability, mode of action and possible toxic health effects. Microscopic techniques including fluorescence‐based confocal laser scanning microscopy, super‐resolution fluorescence microscopy and multiphoton microscopy; optical‐based Raman microscopy, photoacoustic microscopy and optical coherence tomography; photothermal microscopy; electron microscopy (transmission electron microscope and scanning electron microscope); atomic force microscopy; X‐ray microscopy and, correlative multimodal imaging are recognized as an indispensable tool in material research and aided in numerous discoveries. Microscopy holds great promise in detecting the fundamental structures of nanoparticles (NPs) that determines their performance and applications. Moreover, the intricate details that allows assessment of chemical composition, surface topology and interfacial properties, molecular, microstructure, and micromechanical properties are also elucidated. With plethora of applications, microscopy‐based techniques have been used to characterize novel NPs alongwith their proficient designing and adoption of safe strategies to be exploited in nanomedicine. Consequently, microscopic techniques have been extensively used in the characterization of fabricated NPs, and their biomedical application in diagnostics and therapeutics. The present review provides an overview of the microscopy‐based techniques for in vitro and in vivo application in nanomedical investigation alongwith their challenges and advancement to meet the limitations of conventional methods.

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“…Nanoparticles (NPs) are materials that have one dimension in the 1-100 nm range [10]. Therefore, at least one dimension of a nanoparticle is about one hundred thousand times smaller than the diameter of a human hair or the thickness of a paper sheet [11]. As a result of their unique physicochemical properties, NPs are frequently employed in numerous applications, which include medical, catalysis, electronics, cosmetics and personal products, food supplements, coatings, pharmaceuticals, clothing, sportswear, and environmental applications [12][13][14][15], resulting in a massive increase of their use [16,17].…”

Section: Introductionmentioning

confidence: 99%

Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles

Stefanarou

Katzourakis

et al. 2023

Water

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Human activities in modern life are contributing significantly to global environmental pollution. With the need for clean drinking water ever increasing, so does the need to find new water-cleaning technologies. The ability of nanoparticles (NPs) to remove persistent pollutants from aqueous solutions makes them very important for use in water treatment technology. Titanium dioxide (TiO2) is recognized as an NP with unique optical, thermal, electrical, and magnetic properties and is widely used as an adsorbent material. Due to the extensive use of pesticides, their removal from the aquatic environment has gained widespread attention from the scientific community. In the present work, the transport of pesticide thiophanate methyl (TM), as well as the cotransport of TM and TiO2 nanoparticles, in a water-saturated column packed with quartz sand under various water conditions were investigated. Several ionic strengths (1, 10, 50, and 100 mM) and pH values (3, 5, 7, and 10) were examined. The results from the transport experiments were fitted and analyzed with the use of the ColloidFit software, while the results from the cotransport experiments were fitted with a modified version of a recently developed mathematical cotransport model. The results of this study suggested that the lowest mass recovery rate was for the cotransport experiments with the addition of NaCl. Furthermore, it was shown that TM has a weak affinity for sand but a relatively strong affinity for TiO2 at high ionic strength and acidic pH, probably accounting for the reduced mass recovery of TM in cotransport experiments.

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Nanotechnology and the Environment

Cited by 18 publications

References 0 publications

Bioactive Nano-Filters to Control Legionella on Indoor Air

Bioactive Nano-Filters to Control Legionella on Indoor Air

Microscopy based methods for characterization, drug delivery, and understanding the dynamics of nanoparticles

Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles

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