Methods for separation, identification, characterization and quantification of silver nanoparticles

Liu, Jingfu; Yu, Sujuan; Yin, Yongguang; Ji, Chao

doi:10.1016/j.trac.2011.10.010

Cited by 144 publications

(79 citation statements)

References 67 publications

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“…The advantage of this technique is its nontoxicity. However, for NP prepared in organic medium, transferring from organic solvent to aqueous solution is challenging due to the coagulation possibility of some particles [189]. Fortunately, this is not a big problem for C-dots sample which is usually synthesized in aqueous medium and possesses excellent water solubility.…”

Section: Density Gradientmentioning

confidence: 99%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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Carbon nanodots (C-dots) are recently discovered fluorescent carbon nanoparticles with typical sizes of <10 nm. The C-dots have been reported to have excellent photophysical and chemical characteristics. In recent years, the advances in the development and improvement in C-dots synthesis, characterization, and applications are burgeoning. In this review, we introduce the most commonly used techniques for the characterization of C-dots. The characterization techniques for C-dots are briefly classified, described, and illustrated with applied examples. In addition, the analytical separation methods for C-dots (including electrophoresis, chromatography, density gradient centrifugation, differential centrifugation, solvent extraction, and dialysis) are included and discussed according to their analytical characteristics. The review concludes with an outlook towards the future developments in the characterization and the analytical separation of C-dots. The comprehensive overview of the characterization and the analytical separation techniques will safeguard people to use each technique more wisely.

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Section: Density Gradientmentioning

confidence: 99%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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“…Ag nanoparticle (Ag NPs) is clusters of silver atoms of 1-100 nm at least in one dimension [1,2]. Owing to their unique physical and chemical properties, they are widely used in various areas of science and technology, such as surface-enhanced Raman spectroscopy [3], catalysts [4], anti-bacterial materials [5], sensors [6], lubricating materials [7], and so on, with exponentially increasing production.…”

Section: Introductionmentioning

confidence: 99%

Characterization and optical studies of PVP-capped silver nanoparticles

et al. 2016

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In this study, the size-controlled synthesis of silver nanoparticles (Ag NPs) via chemical reduction method by NaBH 4 as a reducing agent and poly(vinyl pyrrolidone) or PVP as a stabilizing agent is reported. Changing of ratios between reducing agent and stabilizing agent relative to AgNO 3 -optimized conditions for synthesis of stable Ag NPs was studied. The formation of Ag NPs was tracked by UV-Vis spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectroscopy. Particle size distribution was studied by particle size analyzer, and the morphology was examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The optical properties of the synthesized Ag NPs were also investigated. The optimized Ag NPs were very stable even after 1 month that was due to effective stabilization by PVP molecules. The mechanism of Ag NPs formation and stabilization is discussed in detail.

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“…FFF includes flow field-flow fractionation (FFFF), sedimentation field-flow fractionation, and thermal fieldflow fractionation (Gimbert et al, 2005;Baalousha et al, 2006;Hassellöv et al, 2008;Plathe et al, 2010;Baalousha et al, 2011;von der Kammer et al, 2011). Other important methods are centrifugation and ultracentrifugation (Bootz et al, 2004;Hassellöv et al, 2008), size-exclusion chromatography (SEC) (Weinberg et al, 2011), hydrodynamic chromatography (Tiede et al, 2010), capillary electrophoresis (CE) (Celiz et al, 2011), gel electrophoresis (Surugau and Urban, 2009), isoelectric focusing (Howard, 2010), manipulation between solvent phases such as cloud point extraction (Howard, 2010;Liu et al, 2012), and photophoretic velocimetry (Helmbrecht et al, 2011). Most of these fractionation techniques can be coupled with detectors that can trace the separated particles online.…”

Section: Pretreatment and Particle Fractionationrelated Techniquesmentioning

confidence: 99%

“…An ATOF-MS consists of an aerosol introduction interface; a light-scattering region for sizing and a TOF-MS (time-of-flight mass spectrometer). MS approaches nowadays have been widely applied to measure NPs in the environment (Gray et al, 2012;Liu et al, 2012;Fabricius et al, 2014).…”

Section: Mass Spectrometrymentioning

confidence: 99%

Measurement and characterization of engineered titanium dioxide nanoparticles in the environment

Luo

Wang

et al. 2014

J. Zhejiang Univ. Sci. A

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Titanium dioxide nanoparticles (TiO 2 -NPs) are common components used in sunscreens, cosmetics, industrial applications, and many other products. Concerning their high production and widespread applications, characterization and quantification of TiO 2 -NPs in various matrixes is a topic of great interest for researchers studying their potential environmental and health impacts. Validated and easily applicable analytical tools are required to develop and implement regulatory frameworks and an appropriate risk assessment for engineered nanoparticles (ENPs). Herein, we provide a critical review of the current knowledge available on world-wide production and measured environmental concentrations as well as on available techniques to measure and characterize these ENPs in the environment.

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Methods for separation, identification, characterization and quantification of silver nanoparticles

Cited by 144 publications

References 67 publications

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Characterization and optical studies of PVP-capped silver nanoparticles

Measurement and characterization of engineered titanium dioxide nanoparticles in the environment

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