Электронный каталог

Статья

Kupriyanov, A.V.
Gas-Phase Modification as Key Process in Design of New Generation of Gd&sub(2)O&sub(3)-Based Contrast Agents for Computed Tomography / A.V.Kupriyanov, G.A.Chelkov, [a.o.]. – Text : electronic // Surfaces. – 2026. – Vol. 9, No. 1. – P. 1. – URL: https://doi.org/10.3390/surfaces9010001. – Bibliogr.: 48.

n the present study, thin-layered core–shell Gd&sub(2)O&sub(3)@SiO&sub(1.5)R (R is C&sub(3)H&sub(6)NH&sub(2)) structures were synthesized by gas-phase surface modification of a Gd&sub(2)O&sub(3) core with a 3-aminopropyltriethoxysilane (APTES) shell for the first time. The proposed method consists of two consecutive steps carried out in a fixed-bed reactor. The first step involves APTES adsorption on the Gd&sub(2)O&sub(3) surface, followed by APTES hydrolysis by water vapor. The organosyloxane shell formation was confirmed by transmission and scanning electron microscopy, IR spectroscopy, and thermogravimetric data. X-ray attenuation coefficients of Gd&sub(2)O&sub(3) and Gd&sub(2)O&sub(3)@SiO&sub(1.5)R samples were determined by photon-counting computed tomography in a phantom study. The SiO&sub(1.5)R shells in the synthesized Gd&sub(2)O&sub(3)@SiO&sub(1.5)R samples had minimal thickness and did not affect the attenuation coefficients of Gd&sub(2)O&sub(3)



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