scholarly journals Front Cover: Soluble Platinum Nanoparticles Ligated by Long-Chain N-Heterocyclic Carbenes as Catalysts (Chem. Eur. J. 52/2017)

2017 ◽  
Vol 23 (52) ◽  
pp. 12676-12676
Author(s):  
Luis M. Martínez-Prieto ◽  
Lena Rakers ◽  
Angela M. López-Vinasco ◽  
Israel Cano ◽  
Yannick Coppel ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Heterocyclic Carbenes ◽  
Front Cover ◽  
Long Chain

scholarly journals Soluble Platinum Nanoparticles Ligated by Long-Chain N-Heterocyclic Carbenes as Catalysts

2017 ◽  
Vol 23 (52) ◽  
pp. 12680-12680 ◽  
Author(s):  
Luis M. Martínez-Prieto ◽  
Lena Rakers ◽  
Angela M. López-Vinasco ◽  
Israel Cano ◽  
Yannick Coppel ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Heterocyclic Carbenes ◽  
Long Chain

Soluble Platinum Nanoparticles Ligated by Long-Chain N-Heterocyclic Carbenes as Catalysts

2017 ◽  
Vol 23 (52) ◽  
pp. 12779-12786 ◽  
Author(s):  
Luis M. Martínez-Prieto ◽  
Lena Rakers ◽  
Angela M. López-Vinasco ◽  
Israel Cano ◽  
Yannick Coppel ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Heterocyclic Carbenes ◽  
Long Chain

Highly Stable Water-Soluble Platinum Nanoparticles Stabilized by Hydrophilic N-Heterocyclic Carbenes

2014 ◽  
Vol 126 (48) ◽  
pp. 13436-13440 ◽  
Author(s):  
Edwin A. Baquero ◽  
Simon Tricard ◽  
Juan Carlos Flores ◽  
Ernesto de Jesús ◽  
Bruno Chaudret
Keyword(s):  
Platinum Nanoparticles ◽  
Heterocyclic Carbenes ◽  
Water Soluble

Water-soluble platinum nanoparticles stabilized by sulfonated N-heterocyclic carbenes: influence of the synthetic approach

2018 ◽  
Vol 47 (12) ◽  
pp. 4093-4104 ◽  
Author(s):  
Edwin A. Baquero ◽  
Simon Tricard ◽  
Yannick Coppel ◽  
Juan C. Flores ◽  
Bruno Chaudret ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Heterocyclic Carbenes ◽  
Water Soluble ◽  
Synthetic Approach

On the surface: Pt nanoparticles with NHC ligands at the surface have been prepared in water using different organometallic approaches.

Platinum Nanoparticles Generated in Functionality-Enhanced Reaction Media Based on Polyoctadecylsiloxane with Long-Chain Functional Modifiers

2004 ◽  
Vol 108 (20) ◽  
pp. 6175-6185 ◽  
Author(s):  
Eleonora V. Shtykova ◽  
Dmitri I. Svergun ◽  
Dmitri M. Chernyshov ◽  
Irina A. Khotina ◽  
Peter M. Valetsky ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Reaction Media ◽  
Long Chain

Highly Stable Water-Soluble Platinum Nanoparticles Stabilized by Hydrophilic N-Heterocyclic Carbenes

2014 ◽  
Vol 53 (48) ◽  
pp. 13220-13224 ◽  
Author(s):  
Edwin A. Baquero ◽  
Simon Tricard ◽  
Juan Carlos Flores ◽  
Ernesto de Jesús ◽  
Bruno Chaudret
Keyword(s):  
Platinum Nanoparticles ◽  
Heterocyclic Carbenes ◽  
Water Soluble

Polymer Morphology Revealed by Staining Techniques

1981 ◽  
Vol 39 ◽  
pp. 340-341
Author(s):  
A. C. Reimschuessel ◽  
V. Kramer
Keyword(s):  
Polymer Melt ◽  
Nylon 6 ◽  
Morphological Features ◽  
Negative Staining ◽  
Polymer Morphology ◽  
Crystallizable Polymer ◽  
Staining Techniques ◽  
Long Chain

Staining techniques can be used for either the identification of different polymers or for the differentiation of specific morphological domains within a given polymer. To reveal morphological features in nylon 6, we choose a technique based upon diffusion of the staining agent into accessible regions of the polymer.When a crystallizable polymer - such as nylon 6 - is cooled from the melt, lamellae form by chainfolding of the crystallizing long chain macromolecules. The regions between adjacent lamellae represent the less ordered amorphous domains into which stain can diffuse. In this process the lamellae will be “outlined” by the dense stain, giving rise to contrast comparable to that obtained by “negative” staining techniques.If the cooling of the polymer melt proceeds relatively slowly - as in molding operations - the lamellae are usually arranged in a radial manner. This morphology is referred to as spherulitic.

A theory of contamination in electron microscopes by surface diffusion

1978 ◽  
Vol 36 (1) ◽  
pp. 116-117
Author(s):  
J.T. Fourie
Keyword(s):  
Electron Beam ◽  
Surface Diffusion ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Physical Parameters ◽  
Carbon Compounds ◽  
Hydrocarbon Molecules ◽  
Electron Microscopes ◽  
Primary Electrons ◽  
Long Chain

Contamination in electron microscopes can be a serious problem in STEM or in situations where a number of high resolution micrographs are required of the same area in TEM. In modern instruments the environment around the specimen can be made free of the hydrocarbon molecules, which are responsible for contamination, by means of either ultra-high vacuum or cryo-pumping techniques. However, these techniques are not effective against hydrocarbon molecules adsorbed on the specimen surface before or during its introduction into the microscope. The present paper is concerned with a theory of how certain physical parameters can influence the surface diffusion of these adsorbed molecules into the electron beam where they are deposited in the form of long chain carbon compounds by interaction with the primary electrons.

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