Beiträge zur Kenntnis anorganischer Kolloïde

Gutbier, A.

doi:10.1002/zaac.19020320142

Cited by 21 publications

(4 citation statements)

References 7 publications

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“…The author pronounces innumerable thanks to colleagues who have invaluably supported the author in the area of nanocomposites during the last 17…”

Section: Acknowledgementsmentioning

confidence: 97%

“…In this context it is worth noting that fundamental studies on nanoparticles themselves were performed with metals already 100 years ago. While dialysis experiments showed that silver 17 or gold 18 species which appeared to be dissolved in water existed as particles and not as individual atoms or assemblies of only a few atoms, the particle dimensions in a nanocomposite of gold embedded in a glass matrix were measured with ultramicroscopes as early as in 1903 (these instruments allowed the visualisation of nanoparticles with the help of light scattering). 19 Values down to y6 nm, which was in the range of the resolution limit of the instrument, were found.…”

Section: Nanoparticlesmentioning

confidence: 99%

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Nanocomposites of polymers and inorganic particles: Preparation, structure and properties

Caseri¹

2006

Materials Science and Technology

163

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Although composites with, e.g.nanosized SiO2, TiO2, carbon black or gold are known for a long time, an increasing number of polymer composites comprising inorganic nanoparticles have been described only in the last 15 years. Frequently employed inorganic materials include metals (e.g. gold, silver or copper), semiconductors (e.g. PbS or CdS) or clay minerals (e.g.montmorillonite or vermiculite). In most cases, nanocomposites with spheric or plate like particles have been prepared so far but materials with nanorods (rod like particles, including nanotubes) also attracted attention. The structure of nanocomposites is essentially established by the arrangement of the particles in the polymer matrix. The particles may be dispersed as individual primary particles or as agglomerated particles (secondary particles), and the primary or secondary particles can be arranged randomly or in an ordered or oriented state, depending on the method of nanocomposite preparation and processing (including, e.g. coprecipitation, coevaporation, spin coating or drawing). In order to avoid agglomeration, the nanoparticles are frequently synthesised in situ or applied as surface modified particles, where a spheric inorganic core is preferentially surrounded by a shell composed of organic molecules (core–shell particles). Surface modification is applied routinely for clays, which is of importance for the degree of delamination of the individual silicate layers in the matrix (intercalation or exfoliation). Materials properties of nanocomposites, such as optical transparency, colour (including dichroism), iridescence, catalytic activity or superparamagnetism, can be favourable when compared with analogous composites with larger particles, and these properties may also be influenced by the structure of nanocomposites. The properties of nanocomposites are considered to provide applications in the areas of, e.g. optics, catalysis, electronics, magnetism or mechanics.

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“…The author pronounces innumerable thanks to colleagues who have invaluably supported the author in the area of nanocomposites during the last 17…”

Section: Acknowledgementsmentioning

confidence: 97%

Section: Nanoparticlesmentioning

confidence: 99%

Nanocomposites of polymers and inorganic particles: Preparation, structure and properties

Caseri¹

2006

Materials Science and Technology

163

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“…The main strategy for nanoparticle synthesis is based on the chemical reduction in liquids. Possible reducing agents are phosphor [11,12], formaldehyde [13], acetone [14], citrate [10,15,16], ascorbic acid [17], tannic acid [18][19][20], salicylic acid [20], oxalic acid [15], ethyl alcohol [21], hydroxylamine [22,23] or sodium borohydride. Here we can distinguish between a direct reduction with a reducing agent and the reduction in presence of organic ligands.…”

Section: Synthesis Of Metal Nanoparticles 21 General Strategiesmentioning

confidence: 99%

“…The latter particles represent the so-called monolayer protected clusters or particles, also Brustparticles [7][8][9][10]. Possible reducing agents are phosphor [11,12], formaldehyde [13], acetone [14], citrate [10,15,16], ascorbic acid [17], tannic acid [18][19][20], salicylic acid [20], oxalic acid [15], ethyl alcohol [21], hydroxylamine [22,23] or sodium borohydride. In general, the strength and the amount of the used reducing agent have a key effect to the resulting particle size.…”

Section: Synthesis Of Metal Nanoparticles 21 General Strategiesmentioning

confidence: 99%

Plasmonic nanoparticle synthesis and bioconjugation for bioanalytical sensing

Csáki

Thiele

Jatschka

et al. 2014

Engineering in Life Sciences

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Plasmonic nanoparticles, e.g. nanoscale particles consisting of noble metals, show high potential as transducer elements in novel optical sensors. Their optical properties are based on collective and coherent oscillation of the conduction electrons by irradiating electromagnetic waves. The resulting resonance band (localized surface plasmon resonance [LSPR]) is adjustable in the UV‐ to near‐infrared spectral range and can be defined by the chemical synthesis. The synthesis conditions can determine dimension, material and particle shape, and these parameters represent the main factors for the position of the LSPR and the bulk sensitivity. Therefore, a reproducible synthesis of nanoparticles with defined LSPR is of importance. The sensing principle is based on the strong influence of the surrounding medium's refractive index. Especially, anisotropically shaped particles are especially sensitive to small changes in the medium; therefore, their defined synthesis is in the focus of current developments. In this review, we give an overview of the different synthesis techniques for nanoparticles, including miniaturized fluid devices. For sensoric applications, the conjugation of nanoparticles with biomolecules represents a key step; thus, typical functionalization approaches are considered. In the following sections, different LSPR sensing strategies are introduced, and possible applications, especially in DNA analytics, are demonstrated.

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Artificial Photosynthetic Transformations Through Biocatalysis and Biomimetic Systems

Willner

1995

Advances in Photochemistry

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Beiträge zur Kenntnis anorganischer Kolloïde

Abstract: Beeuglich der Iitteratur uber die Kolloi'de sei auf LOTTERMOSER: An-1. c.

Cited by 21 publications

References 7 publications

Nanocomposites of polymers and inorganic particles: Preparation, structure and properties

Nanocomposites of polymers and inorganic particles: Preparation, structure and properties

Plasmonic nanoparticle synthesis and bioconjugation for bioanalytical sensing

Artificial Photosynthetic Transformations Through Biocatalysis and Biomimetic Systems

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