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The cavitation activity of aqueous suspensions of porous silicon nanoparticles with different degrees of surface hydrophobicityстатья
- Авторы: Egoshina V., Gongalsky M.B., Tsurikova U.A., Sviridov A.P., Osminkina L.A., Andreev V.G.
- Журнал: Acoustical Physics
- Том: 68
- Номер: 6
- Год издания: 2022
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 649
- Последняя страница: 656
- DOI: 10.1134/S106377102206015X
- Аннотация: The dependence of acoustic cavitation thresholds in aqueous suspensions of porous siliconnanoparticles (pSiNPs) on the degree of hydrophobicity of their surface has been studied. Nanoparticles with an average size of 100 nm were prepared by mechanical grinding of porous silicon (pSi) films in ethanol. According to IR spectroscopy data, such pSiNPs are initially characterized by a hydrophilic surface. Toobtain amphiphilic (hydrophobic–hydrophilic) nanoparticles, pSi films were hydrophobized before grinding by surface modification with octadecylsilane. When hydrophobic pSi films are ground in ethanol to nanoparticles,silicon–silicon bonds are broken, followed by their oxidation, due to which the surface is partially hydrophilized. It has been shown that the threshold of acoustic cavitation in suspensions of amphiphilic pSiNPs is significantlyreduced compared to that of hydrophilic pSiNPs. The threshold value of acoustic cavitation in a suspension of amphiphilic nanoparticles at a concentration of 1 mg/mL remained almost constant for 5 days. The results obtained are important for the development of methods for sonodynamic therapy of cancer using pSiNPs.
- Добавил в систему: Андреев Валерий Георгиевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | AP649.pdf | 1,7 МБ | 23 ноября 2022 [VGAndreev55] |