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- W2922608708 abstract "Abstract This article is aimed to disclose the properties of diluted (≤100 mg dm−3) hydrosols of detonation nanodiamond (DND). Examining of the behavior of such highly diluted systems is significant for understanding their fate in biological systems. The disperse system consists of the particles with the size of ca. 30–100 nm, which are positively charged: ζ ≈ +(50–70) mV. This favors adsorption of an anionic dye dicyano‑[3‑(dicyanomethylene)cyclohex‑1‑en‑1‑yl]methanide. Even more so, despite similar electrical charge a hydrophobic enough cationic dye 1,3,3‑trimethyl‑2‑[7‑(1,3,3‑trimethylindolin‑2‑ylidene)hepta‑1,3,5‑trien‑1‑yl]‑3H‑indoliu also interacts with the DND nanoparticles in aqueous media. The surface structure and morphology are examined after evaporation using high-resolution transmission electron microscopy. These data show that the aggregates consist of nanometer-sized well-rounded crystallites of cubic diamond phase and allow suggesting a huge surface area of the colloidal species. The coagulation is studied using inorganic electrolytes via spectrophotometric procedure and dynamic light scattering measurements, for both freshly prepared and aged hydrosols. The determination of the coagulation rates allows calculating the Fuchs function and thus estimating the critical coagulation concentration, CCC. The experimentally determined CCC value of NaCl is in line with the Hamaker diagram constructed using the DLVO theory. The ratio of the reciprocal CCC values is as follows: 1 (NaCl):48 (Na2SO4):228 (K3Fe(CN)6), in agreement with the Schulze–Hardy rule. On the other hand, another ratio of CCC−1, 1 (NaCl):0.8 (HCl):16 (NaOH), gives support to the acidic nature of the positive charge of the colloidal particles of DND. The peculiar of the interactions with inorganic electrolytes and organic dyes of the system under study are compared with those of the C60 hydrosol." @default.
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- W2922608708 date "2019-06-01" @default.
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- W2922608708 title "The interaction of the colloidal species in hydrosols of nanodiamond with inorganic and organic electrolytes" @default.
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- W2922608708 doi "https://doi.org/10.1016/j.molliq.2019.03.095" @default.
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