Diffusion NMR Spectroscopy for the Characterization of the Size and Interactions of Colloidal Matter:  The Case of Vesicles and Nanoparticles

Valentini, Massimiliano; Vaccaro, Andréa; Rehor, Annemie; Napoli, Alessandro; Hubbell, Jeffrey A.; Tirelli, Nicola

doi:10.1021/ja037247r

Cited by 83 publications

(59 citation statements)

References 46 publications

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“…Carter et al (2005) characterized air-and water-stable silica nanoparticles by NMR. Diffusion NMR spectroscopy has also been used for the characterization of the size and interactions of colloidal matter (Valentini et al 2004;Carter et al 2005). Lead et al (2000a) used pulsed field gradient NMR to measure the diffusion coefficients of fulvic acids.…”

Section: Spectroscopic and Related Techniquesmentioning

confidence: 99%

Detection and characterization of engineered nanoparticles in food and the environment

Tiede

Boxall

Tear

et al. 2008

Food Additives & Contaminants: Part A

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360

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Nanotechnology is developing rapidly and, in the future, it is expected that increasingly more products will contain some sort of nanomaterial. However, to date, little is known about the occurrence, fate and toxicity of nanoparticles. The limitations in our knowledge are partly due to the lack of methodology for the detection and characterisation of engineered nanoparticles in complex matrices, i.e. water, soil or food. This review provides an overview of the characteristics of nanoparticles that could affect their behaviour and toxicity, as well as techniques available for their determination. Important properties include size, shape, surface properties, aggregation state, solubility, structure and chemical composition. Methods have been developed for natural or engineered nanomaterials in simple matrices, which could be optimized to provide the necessary information, including microscopy, chromatography, spectroscopy, centrifugation, as well as filtration and related techniques. A combination of these is often required. A number of challenges will arise when analysing environmental and food materials, including extraction challenges, the presence of analytical artifacts caused by sample preparation, problems of distinction between natural and engineered nanoparticles and lack of reference materials. Future work should focus on addressing these challenges.

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Section: Spectroscopic and Related Techniquesmentioning

confidence: 99%

Detection and characterization of engineered nanoparticles in food and the environment

Tiede

Boxall

Tear

et al. 2008

Food Additives & Contaminants: Part A

645

360

View full text Add to dashboard Cite

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“…The discrepancy between the DLS results and those from TEM is due to DLS being inherently biased toward larger particles in particle distributions. Valentini et al [81] observed similar discrepancies for polypropylene sulfide nanoparticles dispersed in water.…”

Section: Dynamic Light Scatteringmentioning

confidence: 65%

Stabilization and Large Nonlinearity of Gold Nanoparticles Functionalized with a π‐Conjugated Polymer

Liu

et al. 2009

ChemPhysChem

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Gold nanoparticles protected by a novel pi-conjugated polymer [poly(p-phenylene ethynylene) containing pendent disulfide and bipyridine groups] are synthesized and characterized. The polymer can stabilize the gold nanoparticles effectively. The nonlinear optical properties of the gold nanoparticle colloid solutions in toluene are investigated by using the Z-scan technique at a wavelength of 532 nm and pulse width of 4 ns. The gold-nanoparticle colloid solutions show an exceptional nonlinear absorption effect, which simultaneously contains the saturated absorption resulting from third-order nonlinearity and a large reverse-saturated absorption resulting from fifth-order nonlinearity. In addition, asymmetric self-focusing refractive effects are investigated in the colloid solutions.

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“…Diffusion NMR spectroscopy has the capability to characterize the size and interactions of colloidal matter [135]. Huang et al studied on the extraction of nanosize copper pollutants such as Cu and Cu 2?…”

Section: Nuclear Magnetic Resonancementioning

confidence: 99%

Instrumental approach toward understanding nano-pollutants

Naghdi

Metahni

Ouarda

et al. 2017

Nanotechnol. Environ. Eng.

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Nano-pollutants (NPLTs) have recently raised global concerns due to their possible harmful impact on environment and human health. However, until date, information on the occurrence, fate and toxicity of NPLTs in environment is scant. The knowledge gap can be attributed to the lack of advanced and sophisticated methodologies for the precise detection and characterization of NPLTs at lower concentration in complex matrices, such as surface water, wastewater, soil and food. This review briefly discusses the performance of classical methods for characterization and study of the properties of NPLTs. The important properties include shape, size, aggregation state, chemical composition and structure. Chromatographic, microscopic and spectroscopic techniques have been developed for detection and quantitative estimation of fabricated or naturally existed NPLTs in different matrices. Often, combination of these techniques is required for the separation, purification and accurate estimation. For better detection and understanding of the initial steps of interaction with the environmental matrices, pollution sources, such as wastewater and industrial discharges, must be selected as sampling points. Understanding the dynamics of agglomeration, and decantation will allow to estimate the plume of transport to delimit the potential effects.

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Diffusion NMR Spectroscopy for the Characterization of the Size and Interactions of Colloidal Matter: The Case of Vesicles and Nanoparticles

Cited by 83 publications

References 46 publications

Detection and characterization of engineered nanoparticles in food and the environment

Detection and characterization of engineered nanoparticles in food and the environment

Stabilization and Large Nonlinearity of Gold Nanoparticles Functionalized with a π‐Conjugated Polymer

Instrumental approach toward understanding nano-pollutants

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