TY - JOUR

T1 - Formation of uniform spatial distribution of Fe3O4 nanoparticles during evaporation of a magnetic nanofluid droplet on a biphilic surface

AU - Starinskaya, E. M.

AU - Rodionov, A. A.

AU - Safonov, A. I.

AU - Sulyaeva, V. S.

AU - Miskiv, N. B.

AU - Starinskiy, S. V.

N1 - Сведения о финансировании Финансирующий спонсор Номер финансирования Российский научный фонд 24–19–00664

PY - 2025/4

Y1 - 2025/4

N2 - This paper is dedicated to a detailed investigation of the influence of surface wettability on the evaporation dynamics of a sessile nanofluid droplet. For the first time, a comparison of the sediment formation process from magnetic nanoparticles Iron(II,III) oxide Fe3O4 on hydrophilic, hydrophobic, and biphilic surfaces, consisting of superhydrophobic and superhydrophilic areas, has been conducted. The use of biphilic surfaces allows for the uniform deposition of nanoparticles on the substrate surface when their mass concentration in liquid is low (∼0.01 wt. %). For higher concentrations (>0.1 wt. %), the formation of a solid framework during the final stages of droplet evaporation is characteristic, leading to the formation of a dome from the nanoparticles. Further liquid evaporation causes the collapse of the dome and the formation of irregular agglomerates on the substrate surface. A mechanism for dome formation is proposed, which also explains the uniform deposition of nanoparticles on the surface not observed during evaporation on hydrophilic or hydrophobic surfaces. The proposed mechanism is based on a combination of magnetic interactions between particles and the unique nature of convective flow formation during evaporation on a biphilic surface.

AB - This paper is dedicated to a detailed investigation of the influence of surface wettability on the evaporation dynamics of a sessile nanofluid droplet. For the first time, a comparison of the sediment formation process from magnetic nanoparticles Iron(II,III) oxide Fe3O4 on hydrophilic, hydrophobic, and biphilic surfaces, consisting of superhydrophobic and superhydrophilic areas, has been conducted. The use of biphilic surfaces allows for the uniform deposition of nanoparticles on the substrate surface when their mass concentration in liquid is low (∼0.01 wt. %). For higher concentrations (>0.1 wt. %), the formation of a solid framework during the final stages of droplet evaporation is characteristic, leading to the formation of a dome from the nanoparticles. Further liquid evaporation causes the collapse of the dome and the formation of irregular agglomerates on the substrate surface. A mechanism for dome formation is proposed, which also explains the uniform deposition of nanoparticles on the surface not observed during evaporation on hydrophilic or hydrophobic surfaces. The proposed mechanism is based on a combination of magnetic interactions between particles and the unique nature of convective flow formation during evaporation on a biphilic surface.

KW - Biphilic surface

KW - Cassie-Baxter

KW - Coffee ring

KW - Droplet evaporation

KW - Ferrofluid

KW - Laser ablation

KW - Nanofluid

KW - Nanoparticle deposit

KW - Sessile droplet

KW - Superhydrophilic

KW - Superhydrophobic

KW - Wenzel

UR - https://www.mendeley.com/catalogue/438c2065-e1fa-3353-93e8-13c8130948c1/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85212825302&origin=inward&txGid=a3c0b0eb426f44cea1e6bfb6fbfbbbfb

U2 - 10.1016/j.ijheatmasstransfer.2024.126602

DO - 10.1016/j.ijheatmasstransfer.2024.126602

M3 - статья

VL - 239

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

M1 - 126602

ER -