Evaluation of labeling methods used for investigating the environmental behavior and toxicity of metal oxide nanoparticles

Deline, Alyssa R.; Nason, Jeffrey A.

doi:10.1039/c8en01187g

Cited by 15 publications

(5 citation statements)

References 169 publications

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“…of polymer-wrapped nanocrystals with controllable structures and unique properties. Furthermore, we envision that our functionalization method with PAA-mPEO 4 could broaden the applicability of ITO nanocrystals to areas where plasmonic metal oxides are less employed and explored such as hydrogels, − bioassays, , therapeutics, toxicology studies, − and other biological applications.…”

Section: Discussionmentioning

confidence: 99%

Aqueous Processing and Spray Deposition of Polymer-Wrapped Tin-Doped Indium Oxide Nanocrystals as Electrochromic Thin Films

et al. 2020

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Plasmonic metal oxide nanocrystals are interesting electrochromic materials because they display high modulation of infrared light, fast switching kinetics, and durability. Nanocrystals facilitate solution-based and high-throughput deposition, but typically require handling hazardous nonaqueous solvents and further processing of the as-deposited film with energy-intensive or chemical treatments. We report on a method to produce aqueous dispersions of tin-doped indium oxide (ITO) by refunctionalizing the nanocrystal surface, previously stripped of its native hydrophobic ligands, with a hydrophilic poly(acrylic acid) polymer featuring a low density of methoxy-terminated poly(ethylene oxide) grafts (PAA-mPEO4). To determine conditions favoring the adsorption of PAA-mPEO4 on ITO, we varied the pH and chemical species present in the exchange solution. The extent of polymer wrapping on the nanocrystal surface can be tuned as a function of the pH to prevent aggregation in solution and deposit uniform, smooth, and optical quality spray coated thin films. We demonstrate the utility of polymer-wrapped ITO nanocrystal thin films as an electrochromic material and achieve fast, stable, and reversible near-infrared modulation without the need to remove the polymer after deposition provided that a wrapping density of ∼20% by mass is not exceeded.

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Section: Discussionmentioning

confidence: 99%

Aqueous Processing and Spray Deposition of Polymer-Wrapped Tin-Doped Indium Oxide Nanocrystals as Electrochromic Thin Films

et al. 2020

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“…The latter biosensor employs labeled molecules for the detection of a target (Proll et al, 2007;Rhouati et al, 2016). Common labeling Frontiers in Microbiology frontiersin.org platforms are fluorescence or luminescence labeling, radiolabeling, isotope labeling, and enzymes (Deline and Nason, 2019;Ranjbar Bahadori et al, 2021). In these procedures, the final sensor signal represents the number of labels bound to target molecules.…”

Section: Biosensors: Development and Typesmentioning

confidence: 99%

Toward waterborne protozoa detection using sensing technologies

et al. 2023

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Drought and limited sufficient water resources will be the main challenges for humankind during the coming years. The lack of water resources for washing, bathing, and drinking increases the use of contaminated water and the risk of waterborne diseases. A considerable number of waterborne outbreaks are due to protozoan parasites that may remain active/alive in harsh environmental conditions. Therefore, a regular monitoring program of water resources using sensitive techniques is needed to decrease the risk of waterborne outbreaks. Wellorganized point-of-care (POC) systems with enough sensitivity and specificity is the holy grail of research for monitoring platforms. In this review, we comprehensively gathered and discussed rapid, selective, and easy-to-use biosensor and nanobiosensor technologies, developed for the early detection of common waterborne protozoa.

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“…Labeling nanomaterials with radioactive and stable isotopes has enabled the detection and quantification of these isotopically labeled nanomaterials with high sensitivities and selectivities against interferences from natural background; 205 radiolabeling enables very low detection limits (in the range from pg/L to ng/L), whereas stable isotope labeling yields detection limits on the order from 1 to 10 ng/L (or ng/kg). 206,207 However, these isotopic tracer techniques cannot be used for analyzing nanomaterials without such deliberate labels, which is the case for the majority of natural and engineered nanomaterials already present in or being released into the environment, except for nanomaterials with known inherent isotope ratios (e.g., CNTs). 208 In contrast, the recently developed isotopic fingerprinting technique based on multicollector ICP-MS (MC-ICP-MS) analysis of stable isotope ratios shows great promise for identification, quantification, and source tracing of nanomaterials.…”

Section: Quantify Nanomaterials In Environmental Samplesmentioning

confidence: 99%

Current Methods and Prospects for Analysis and Characterization of Nanomaterials in the Environment

Jiang

Liu

Zhang

et al. 2022

Environ. Sci. Technol.

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Analysis and characterization of naturally occurring and engineered nanomaterials in the environment are critical for understanding their environmental behaviors and defining real exposure scenarios for environmental risk assessment. However, this is challenging primarily due to the low concentration, structural heterogeneity, and dynamic transformation of nanomaterials in complex environmental matrices. In this critical review, we first summarize sample pretreatment methods developed for separation and preconcentration of nanomaterials from environmental samples, including natural waters, wastewater, soils, sediments, and biological media. Then, we review the state-of-the-art microscopic, spectroscopic, mass spectrometric, electrochemical, and size-fractionation methods for determination of mass and number abundance, as well as the morphological, compositional, and structural properties of nanomaterials, with discussion on their advantages and limitations. Despite recent advances in detecting and characterizing nanomaterials in the environment, challenges remain to improve the analytical sensitivity and resolution and to expand the method applications. It is important to develop methods for simultaneous determination of multifaceted nanomaterial properties for in situ analysis and characterization of nanomaterials under dynamic environmental conditions and for detection of nanoscale contaminants of emerging concern (e.g., nanoplastics and biological nanoparticles), which will greatly facilitate the standardization of nanomaterial analysis and characterization methods for environmental samples.

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Evaluation of labeling methods used for investigating the environmental behavior and toxicity of metal oxide nanoparticles

Abstract: The analysis of the environmental behavior and toxicity of metal oxide nanoparticles (MONPs) is complicated by high metal concentrations in natural matrices.

Cited by 15 publications

References 169 publications

Aqueous Processing and Spray Deposition of Polymer-Wrapped Tin-Doped Indium Oxide Nanocrystals as Electrochromic Thin Films

Aqueous Processing and Spray Deposition of Polymer-Wrapped Tin-Doped Indium Oxide Nanocrystals as Electrochromic Thin Films

Toward waterborne protozoa detection using sensing technologies

Current Methods and Prospects for Analysis and Characterization of Nanomaterials in the Environment

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