2026-10-11T12:59:16Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33994492 2026-09-25T10:04:58Z category_1 category_146 category_915 category_7 category_24 category_873 category_46 category_135 portal_63 item_type_2 month_year_09_2026

Regulating Bubble Nucleation via Gas Cavities on Superhydrophilic Surfaces Jinke Zhang (9254498) Ziwei Guo (5867147) Chunhui Zhang (337556) Cunming Yu (1411771) Yuzhen Ning (9616738) Liping Heng (1877068) Yanchen Fu (25109275) Kesong Liu (2457112) Lei Jiang (73366) Biophysics Space Science Physical Sciences not elsewhere classified Medicine Evolutionary Biology Chemical Sciences not elsewhere classified Immunology Computational Biology quantitative experiments establish patterned superhydrophilic surfaces functional superhydrophilic surfaces approximately 360 cm accomplish spatially localized overall bubble dynamics directional bubble detachment programmable nucleation control enable effective regulation trapped gas cavities electrocatalytic gas evolution bubble nucleation behavior 90 ± 0 29 ± 0 2 </ sub bubble nucleation rate bubble nucleation nucleation rate effective strategy demand nucleation yet overlook supersaturation ratio scalable laser precise manipulation positive dependence pivotal contribution mineral flotation mechanistic characterizations dominated mechanism constructing micro Bubble nucleation is a fundamental process governing scientific and industrial performances across pool boiling heat transfer, electrocatalytic gas evolution, and mineral flotation. Existing interfacial modulation approaches predominantly rely on constructing micro/nanostructures to lower heterogeneous nucleation energy barriers, yet overlook the pivotal contribution of surface-trapped gas cavities, which restricts the achievement of stable, precisely tailored bubble generation and hinders the development of programmable nucleation control. Herein, we fabricated a series of functional superhydrophilic surfaces with rationally designed microstructures via laser etching, which enable effective regulation of bubble nucleation behavior. Quantitative experiments establish a positive dependence of nucleation rate on surface roughness. Mechanistic characterizations and numerical simulations unambiguously demonstrate that trapped gas cavities confined within rough textures act as dominant preferential nucleation sites. At a CO₂ supersaturation ratio of 0.90 ± 0.19, rough superhydrophilic surfaces retaining gas cavities exhibit a bubble nucleation rate of approximately 360 cm^–2 s^–1. Furthermore, bubble nucleation and release remain achievable even at a CO₂ supersaturation ratio of 0.29 ± 0.11. Benefiting from the gas-cavity-dominated mechanism, scalable laser-patterned superhydrophilic surfaces are engineered to accomplish spatially localized, on-demand nucleation and directional bubble detachment, affording an effective strategy for precise manipulation of overall bubble dynamics. 2026-09-25T00:00:00Z Dataset Media 10.1021/acsnano.6c12552.s011 https://figshare.com/articles/media/Regulating_Bubble_Nucleation_via_Gas_Cavities_on_Superhydrophilic_Surfaces/33994492 CC BY-NC 4.0