Gold colloid analysis by inductively coupled plasma-mass spectrometry in a single particle mode

Degueldre, C.; Favarger, Pierre-Yves; Wold, Susanna

doi:10.1016/j.aca.2005.09.021

Cited by 258 publications

(202 citation statements)

References 20 publications

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“…The transport velocity of the particles in the plasma can be estimated to be approximately 30 m/s [75], resulting in a residence time in the plasma of approximately 1 ms. Calculations for heat transfer and sublimation rates concluded that particles up to approximately 5 mm should therefore be destroyed in the plasma [78]. From experiments with SiO 2 ENPs of different size classes, a quantitative transfer into the ICP-MS can be achieved at least for particles up to 1 mm (Agilent 7700 series equipped with a concentric nebulizer and Scott-type spray chamber, both constructed of fluoropolymer).…”

Section: Single Particle Icp-ms Analysis For Identification/detectionmentioning

confidence: 99%

Analysis of engineered nanomaterials in complex matrices (environment and biota): General considerations and conceptual case studies

Kammer

Ferguson

Holden

et al. 2011

Enviro Toxic and Chemistry

403

241

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Section: Single Particle Icp-ms Analysis For Identification/detectionmentioning

confidence: 99%

Analysis of engineered nanomaterials in complex matrices (environment and biota): General considerations and conceptual case studies

Kammer

Ferguson

Holden

et al. 2011

Enviro Toxic and Chemistry

403

241

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“…[158] A number of reports on the use of ICP for the characterization of colloidal systems can be found in literature. While some reports describe the elemental analysis of synthetic, inorganic particles, [161][162][163][164] most of the literature reported for ICP characterization of colloids deals with slurry methods for the analysis of sediments for environmental sciences. [155][156][157] Investigations on polymer-based hybrid nanoparticles are rare in literature.…”

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confidence: 99%

Surface Patterning with Colloidal Monolayers

Vogel

2012

Springer Theses

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This thesis focuses on the controlled assembly of monodisperse polymer colloids into ordered two-dimensional arrangements. These assemblies, commonly referred to as colloidal monolayers, are subsequently used as masks for the generation of arrays of complex metal nanostructures on solid substrates.The motivation of the research presented here is twofold. First, monolayer crystallization methods were developed to simplify the assembly of colloids and to produce more complex arrangements of colloids in a precise way. Second, various approaches to colloidal lithography are designed with the aim to include novel features or functions to arrays of metal nanostructures.The air/water interface was exploited for the crystallization of colloidal monolayer architectures as it combines a two-dimensional confinement with a high lateral mobility of the colloids that is beneficial for the creation of high long range order. A direct assembly of colloids is presented that provides a cheap, fast and conceptually simple methodology for the preparation of ordered colloidal monolayers. The produced two-dimensional crystals can be transformed into nonclose-packed architectures by a plasma-induced size reduction step, thus providing valuable masks for more sophisticated lithographic processes. Finally, the controlled co-assembly of binary colloidal crystals with defined stoichiometries on a Langmuir trough is introduced and characterized with respect to accessible configurations and size ratios.Several approaches to lithography are presented that aim at introducing different features to colloidal lithography. First, using metal-complex containing latex particles, the synthesis of which is described as well, symmetric arrays of metal nanoparticles can be created by controlled combustion of the organic material of the colloids. The process does not feature an inherent limit in nanoparticle size and is able to produce complex materials as will be demonstrated for FePt alloy particles. Precise control over both size and spacing of the particle array is presented.Second, two lithographic processes are introduced to create sophisticated nanoparticle dimer units consisting of two crescent shaped nanostructures in close proximity; essentially by using a single colloid as mask to generate two structures simultaneously. Strong coupling processes of the parental plasmon resonances of the two objects are observed that are accompanied by high near-field enhancements. A plasmon hybridization model is elaborated to explain all polarization dependent shifts of the resonance positions. Last, a technique to produce laterally patterned, ultra-flat substrates without surface topographies by embedding gold nanoparticles in a silicon dioxide matrix is applied to construct robust and re-usable sensing architectures and to introduce an approach for the nanoscale patterning of solid supported lipid bilayer membranes.

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“…The SEM investigations were performed with a Zeiss DSM 962 unit under 30 kV. SEM investigations had previously been tested with gold colloids as recently reported by Degueldre et al [12]. For the current tests the filter membranes were coated with a 15-nm Pt layer by magnetron sputtering prior to microscopic investigations.…”

Section: Colloid Analysis Methodologymentioning

confidence: 99%

Granitic groundwater colloids sampling and characterisation: the strategy for artefact elimination

Nilsson

Hedqvist²,

Degueldre

2008

Anal Bioanal Chem

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Colloids were separated by submicro-filtration of granitic groundwater samples collected at-line under in-situ thermodynamic conditions after down-hole groundwater sampling and transfer at the well head. The methodology avoids the generation of artefacts produced by pH changes due to CO 2 exchange, yielding potential carbonate precipitation, or by O 2 contamination yielding oxidized insoluble phases. The enhanced pressure and the anoxic conditions are also maintained through the filtering procedure. This procedure was carried out after a period of regular sampling of groundwater pumped to the ground surface and continuous on-line long-term measurements (weeks, months) of chemical and physical parameters in the unbroken sample water both at the ground surface and at depth down-hole. Colloid samples were characterized on the submicro-filtration membrane by scanning electron microscopy. Under deep granite groundwater conditions, natural colloids occur sparsely. The colloid concentration was determined C col ∼1 and ∼50 μg L −1 for sizes ranging from 50 to 200 nm or n col ∼3.9×10 9 and 47×10 9 L −1 for sizes larger than 50 nm for KFM11A, Forsmark, and KLX17A, Laxemar, Oskarshamn, respectively, Sweden. These colloids are expected to be clay particles with an average size smaller than 200 nm for the Na-Ca-Cl and NaCl groundwaters (pH 7.6 and 8.00, ionic strength ∼10 −1 and ∼10 −2 mol L −1 , respectively, for KFM11A and KLX17A), the colloid concentrations were comparable with values previously reported in the literature.

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Gold colloid analysis by inductively coupled plasma-mass spectrometry in a single particle mode

Cited by 258 publications

References 20 publications

Analysis of engineered nanomaterials in complex matrices (environment and biota): General considerations and conceptual case studies

Analysis of engineered nanomaterials in complex matrices (environment and biota): General considerations and conceptual case studies

Surface Patterning with Colloidal Monolayers

Granitic groundwater colloids sampling and characterisation: the strategy for artefact elimination

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