Preparation of Silver−Latex Composites

Mayer, Allen; Grebner, and W.; Wannemacher, Reinhold

doi:10.1021/jp000568u

Cited by 181 publications

(131 citation statements)

References 18 publications

(39 reference statements)

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“…The PVP capped AgNPs were synthesized by reduction of AgNO 3 with sodium hypophosphite and stabilized with PVP. 39 Details are shown in the Supporting Information. Stock suspensions of PVP capped AgNPs were prepared by redispersion of the PVP capped AgNPs with water.…”

Section: Methodsmentioning

confidence: 99%

Cloud Point Extraction as an Advantageous Preconcentration Approach for Analysis of Trace Silver Nanoparticles in Environmental Waters

et al. 2009

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Silver nanoparticles (AgNPs) were selectively concentrated from environmental water samples without disturbing their sizes and shapes by cloud point extraction (CPE) with Triton X-114 (TX-114). The highest extraction efficiency for AgNPs was obtained at about their zero point charge pH (pH PZC ), which was ∼3.0-3.5 for the studied AgNPs. Addition of salts such as 35 mM NaNO 3 or 10 mM Na 2 S 2 O 3 enhanced the phase separation and thus increased the extraction efficiency of AgNPs. Furthermore, Na 2 S 2 O 3 efficiently eliminated the interference of Ag + due to the formation of a complex between Ag + and S 2 O 3 2-that was not extracted into the TX-114-rich phase. The presence of humic acid at an environmentally relevant level (0-30 mg/L dissolved organic carbon) had no effect on the extraction of AgNPs. An enrichment factor of 100 was obtained with 0.2% (w/v) TX-114, and the recoveries of AgNPs from various environmental samples were in the range of 57-116% at 0.1-146 µg/L spiked levels. The AgNPs preconcentrated into the TX-114-rich phase were identified by transmission electron microscopy/scanning electron microscopy-energy dispersive spectrometer/UV-vis spectrum and quantified after microwave digestion by inductively coupled plasma mass spectrometry with a detection limit of 0.006 µg/L (34.3 fmol/L particles of AgNPs). As the proposed CPE procedure preserves the sizes and shapes of AgNPs, the original morphology of AgNPs in environmental waters can be obtained by characterizing the preconcentrated analytes in the TX-114-rich phase. This proposed method provides an efficient approach for the analysis and tracking of AgNPs in the environment.Given their large quantity of production and widespread applications, engineered nanomaterials (NMs) will inevitably be released into the environment during production, handling, and disposal. The unique properties of NMs, such as high surfaceto-volume ratio, mobility and catalytic activity, could cause adverse effects on the eco-environmental system. Evaluation of the risk of NMs to human health and the environment relies on the understanding of their fate, transport, and exposure, as well as their effects on the fate, transport, and exposure of other toxic substances. However, little is known about the occurrence, fate, and toxicity of NMs, partly due to the lack of quantitative methodology for NMs in environmental and biological matrixes. 1-6A variety of methods have been developed for characterization and quantitative analysis of NMs in simple matrixes, as well as natural NMs in a complex matrix such as environmental waters and soils. [7][8][9][10][11][12] Characterization was mainly conducted with microscopy and microscopy-related techniques (e.g., scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM)), whereas quantification was mainly based on the coupling of size separation techniques (e.g., size-exclusion chromatography, 13-15 field flow fractionation, [16][17][18] hydrodynamic chromatography, 19,20 and capill...

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Section: Methodsmentioning

confidence: 99%

Cloud Point Extraction as an Advantageous Preconcentration Approach for Analysis of Trace Silver Nanoparticles in Environmental Waters

et al. 2009

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“…In general, even in the presence of stabilizers, the majority of the wet chemical procedures described so far yield stable dispersions of metallic NPs only at low concentrations of metal, in the range of 10 -4 -10 -2 mol/l [53,119,121,[126][127][128][129][130][131][132][133][134][135] and, therefore, are not suitable for large-scale manufacture of conductive inks, which require high metal loadings (usually 20-80 %) [1]. There are only a few reports on the direct preparation of concentrated dispersions of metal NPs.…”

Section: Metal Nps Applicable To Inkjet Ink Formulationsmentioning

confidence: 99%

Metal-based Inkjet Inks for Printed Electronics

Kamyshny¹,

Steinke²,

Magdassi

2011

TOAPJ

368

242

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Abstract:A review on applications of metal-based inkjet inks for printed electronics with a particular focus on inks containing metal nanoparticles, complexes and metallo-organic compounds. The review describes the preparation of such inks and obtaining conductive patterns by using various sintering methods: thermal, photonic, microwave, plasma, electrical, and chemically triggered. Various applications of metal-based inkjet inks (metallization of solar cell, RFID antennas, OLEDs, thin film transistors, electroluminescence devices) are reviewed.

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“…A variety of simple routes such as metal precursor reduction, [9] thermal evaporation techniques or sputtering methods, [10,11] in-situ chemical reduction, [12] the inverse micelle method, [13] and the sol±gel method [14] have been explored for coating the dielectric colloids with metal. In these methods, the pretreatment of the core surface is unnecessary, and metal is synthesized or deposited directly on the core.…”

Section: Introductionmentioning

confidence: 99%

Facile Methods to Coat Polystyrene and Silica Colloids with Metal

Zhang¹,

Liu

Wang

et al. 2004

Adv Funct Materials

179

135

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To avoid the complex core surface functionalization or pretreatment that is necessary in order to coat latex and silica colloids with a uniform, complete metal shell, the solvent‐assisted route has been explored to prepare a complete metal (Ag or Au) shell with controlled thickness on polystyrene (PS) colloids and the electroless plating approach, based on electrostatic attraction, has been explored to prepare a complete silver shell with controlled thickness on silica colloids. Without any additional surface treatment, the as‐prepared complex core–shell colloids can be crystallized directly into long‐range‐ordered structures with photonic bandgaps, as reported here for the first time. These ordered structures may find potential applications as substrates or physical systems for the enhancement of Raman scattering studies, besides applications as photonic crystals. The optical plasmon resonance of the composite core–shell colloids changes with metal shell thickness, the wavelength varying over hundreds of nanometers. Our coating routes are facile and versatile, and can be extended to coat PS and silica colloids with any other metal whose ion or complex can be reduced in solution.

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Preparation of Silver−Latex Composites

Cited by 181 publications

References 18 publications

Cloud Point Extraction as an Advantageous Preconcentration Approach for Analysis of Trace Silver Nanoparticles in Environmental Waters

Cloud Point Extraction as an Advantageous Preconcentration Approach for Analysis of Trace Silver Nanoparticles in Environmental Waters

Metal-based Inkjet Inks for Printed Electronics

Facile Methods to Coat Polystyrene and Silica Colloids with Metal

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