Oriented bouncing of droplets with a small Weber number on inclined one-dimensional nanoforests

Li, Mao; Guo, Qiming; Wen, Jing; Zhan, Fei; Shi, Meng; Zhou, Na; Huang, Chengjun; Wang, Lei; Mao, Haiyang

doi:10.1039/d3nr05449g

Nanoscale

2024

DOI: 10.1039/d3nr05449g

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Oriented bouncing of droplets with a small Weber number on inclined one-dimensional nanoforests

Mao Li,

Qiming Guo,

Jing Wen

et al.

Abstract: Asymmetric superhydrophobic structures with anisotropic wettability can achieve directional bouncing of droplets and thus can have applications in directional self-cleaning, liquid transportation, and heat transfer. To achieve convenient large-scale preparation...

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Steerable droplet precise bouncing on a superhydrophobic surface with superhydrophilic stripes

Huang,

He,

Yin

et al. 2024

Applied Physics Letters

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The precise rebound of a droplet upon hitting a solid surface has garnered significant attention in recent years due to its critical applications in self-cleaning, printing industries, and the design of heat exchanger surfaces, among others. This study introduces an innovative approach that combines femtosecond laser processing with a high-temperature stearic acid modification to create surfaces that feature superhydrophilic (SHL) stripes on a superhydrophobic substrate. By controlling the offset distance between the droplet's impact point and the SHL stripe, we achieved a directional and precise rebound of the droplets. Our findings indicate that the lateral displacement of the droplet increases with the offset distance and always tilts toward the direction of the SHL stripe. This study also incorporates numerical simulations to validate the findings, shedding light on the energy conversion mechanisms at the liquid–solid interface during the impact, particularly during the retraction phase. This discovery is significant for more accurately predicting the specific landing spots of rebounding droplets.

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Steerable droplet precise bouncing on a superhydrophobic surface with superhydrophilic stripes

Huang,

He,

Yin

et al. 2024

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

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Oriented bouncing of droplets with a small Weber number on inclined one-dimensional nanoforests

Abstract: Asymmetric superhydrophobic structures with anisotropic wettability can achieve directional bouncing of droplets and thus can have applications in directional self-cleaning, liquid transportation, and heat transfer. To achieve convenient large-scale preparation...

Cited by 1 publication

References 44 publications

Steerable droplet precise bouncing on a superhydrophobic surface with superhydrophilic stripes

Steerable droplet precise bouncing on a superhydrophobic surface with superhydrophilic stripes

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