A possibility of getting SERS spectra of insoluble aromatic compounds in colloidal silver solutions is described. The method tested for the organic pigment quinacridone quinone consists of dispersing it in calix[n]arenes. The potentials of such cavitands, both as dispersing and as silver functionalization agents, is reported as a function of the substitution in their lower rim and their cavity ...

stable homogeneous dispersions of carbon nanotubes (cnts) were prepared using ethanol as dispersing agent. then, using sol-gel method, dispersion in the hydroxyapatite matrix and its effects on the microstructure were investigated. the phase composition, chemical structure and morphological and size analyses were performed using xrd, ft-ir, sem, tem/saed/edx and raman spectroscopy. the influenc...

Stable homogeneous dispersions of carbon nanotubes (CNTs) were prepared using ethanol as dispersing agent. Then, using sol-gel method, dispersion in the hydroxyapatite matrix and its effects on the microstructure were investigated. The phase composition, chemical structure and morphological and size analyses were performed using XRD, FT-IR, SEM, TEM/SAED/EDX and Raman spectroscopy. The influenc...

Formulation of high solid load slurries is an important aspect in achieving dense, quality ceramic green body shaping by additive manufacturing techniques. To this end, the understanding and control interparticle interactions non-aqueous organic slurry systems imperative. With nanosized powders gaining increasing interest, particle stabilization long-chain polymeric dispersants undesirable due ...

The widespread use of titanium dioxide nanoparticles (TiO2NPs) in consumer products has led to an increase of their concentrations in the environment. For reliable determination of their total concentrations, the microwave assisted digestion procedure for the decomposition of nanoscale anatase and rutile was optimized and Ti concentrations were determined by inductively coupled plasma mass spec...

TEGO® Dispers products have historically proven themselves in numerous coating and printing ink formulations. However, new and challenging applications are constantly being presented, and the products must be able to satisfy the latest demands. Of these, the use of digital printing across a variety of substrates – especially textiles and ceramic tiles – has come into focus and taken priority wi...

The risk of dispersing invasive species, especially human pathogens, through acts of bioterrorism, cannot be neglected. However, that risk appears quite low in comparison with the risk of dispersing animal pathogens that could dramatically burden the agricultural economy of food animal producing countries, such as Australia and countries in Europe and North and South America. Although it is not...

In order to create Fe2O3 and Fe2O3·H2O nanoparticles, various polymers were used as dispersing agents, and the resulting effects on the dispersibility and nanoparticulation of the iron oxides were evaluated. It was revealed that not only the solution viscosity but also the molecular length of the polymers and the surface tension of the particles affected the dispersibility of Fe2O3 and Fe2O3·H2...