title: Ion-Specific and Thermal Effects in the Stabilization of the Gas Nanobubble Phase in Bulk Aqueous Electrolyte Solutions.
abstract: Ion-stabilized nanobubbles in bulk aqueous solutions of various electrolytes were investigated. To understand the ion-specific mechanism of nanobubble stabilization, an approach based on the Poisson--Boltzmann equation at the nanobubble interface and in the near-surface layer was developed. It has been shown that the stabilization of nanobubbles is realized by the adsorption of chaotropic anions at the interface, whereas the influence of cosmotropic cations is weak. With increasing temperature, it should be accounted for by blurring the interface due to thermal fluctuations. As a result, the adsorbed state of ions becomes unstable: the nanobubble loses its stability and vanishes. This prediction was proven in our experiments. It turned out that in the case of liquid samples being kept in hermetically sealed ampules, where the phase equilibrium at the liquid-gas interface is fulfilled for any temperature, the volume number density of nanobubbles decreases with increasing temperature and this decrease is irreversible.
authors.affiliation: Bauman Moscow State Technical University , Second Baumanskaya str. 5, Moscow, 105005 Russia.
authors.forename: Stanislav O
authors.initials: SO
authors.lastname: Yurchenko
authors.affiliation: A. M. Prokhorov General Physics Institute, Russian Academy of Sciences , Moscow, ul. Vavilova 38, 119991 Russia.|National Research Nuclear University MEPhI , Kashirskoe sh. 31, Moscow, 115409 Russia.
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Shkirin
authors.affiliation: The Australian National University , Acton ACT 2601, Australia.
authors.forename: Barry W
authors.initials: BW
authors.lastname: Ninham
authors.affiliation: Bauman Moscow State Technical University , Second Baumanskaya str. 5, Moscow, 105005 Russia.|P. N. Lebedev Physical Institute, Russian Academy of Sciences , Leninskiy prospekt 53, Moscow, 119991 Russia.
authors.forename: Andrey A
authors.initials: AA
authors.lastname: Sychev
authors.affiliation: P. N. Lebedev Physical Institute, Russian Academy of Sciences , Leninskiy prospekt 53, Moscow, 119991 Russia.
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Babenko
authors.affiliation: Institute of Cell Biophysics, Russian Academy of Sciences , Institutskaya ul. 3, Pushchino, Moscow Region, 142290 Russia.
authors.forename: Nikita V
authors.initials: NV
authors.lastname: Penkov
authors.affiliation: Bauman Moscow State Technical University , Second Baumanskaya str. 5, Moscow, 105005 Russia.
authors.forename: Nikita P
authors.initials: NP
authors.lastname: Kryuchkov
authors.affiliation: Bauman Moscow State Technical University , Second Baumanskaya str. 5, Moscow, 105005 Russia.|A. M. Prokhorov General Physics Institute, Russian Academy of Sciences , Moscow, ul. Vavilova 38, 119991 Russia.
authors.forename: Nikolai F
authors.initials: NF
authors.lastname: Bunkin