Multifunctional polyimide-based femtosecond laser micro/nanostructured films with triple Janus properties

Pei, Jiaqing; Yin, Kai; Wu, Tingni; Wang, Lingxiao; Deng, Qinwen; Huang, Yin; Wang, Kai; Arnusch, Christopher J.

doi:10.1039/d3nr03701k

Cited by 30 publications

(13 citation statements)

References 72 publications

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“…The examples of the hydrophilicity and hydrophobicity of materials that affect the movement of the attached droplet are widely available in nature and the industrial community, such as the lotus leaf, , beetle, and Janus mesh. − Based on this principle, a composite structure consisting of HB and HL segments of a collecting electrode is proposed, as shown in Figure . The contact angle θ between HB and HL for a droplet is approximately 120 ± 3° and 3 ± 0.5°, respectively.…”

Section: Resultsmentioning

confidence: 99%

Advanced Fog Harvesting Method by Coupling Plasma and Micro/Nano Materials

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Harvesting fog is a potential and effective way to alleviate the crisis of water resource shortage. A highly efficient and economical fog harvesting method has always been a global and common goal. Here, a promising fog harvesting method by coupling plasma and micro/nano materials is proposed, which can achieve 93% fog collection efficiency with consuming power of only 0.76 W/0.04 m 2 . The basic method is to utilize nanoparticles to decorate both the discharge electrode and the collecting electrode of the micro/nano electrostatic fog collector. For the discharge electrode, the nanoparticles can achieve an order of magnitude higher electric field strength and a 28.6% decrease in the operating voltage (14 kV decreases to 10 kV). For the collecting electrode, a novel composite structure of hydrophobic/hydrophilic (HB/HL) is proposed. The core advantage is the directional droplet transport at the junction of HB and HL caused by surface tension can adjust the accumulated droplets on the two sides, which avoids the droplet residue and mesh blockage in the general structure. This technology provides an innovative approach for the collection of microdroplets and a new design idea for the fog collector to deal with the water crisis.

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Section: Resultsmentioning

confidence: 99%

Advanced Fog Harvesting Method by Coupling Plasma and Micro/Nano Materials

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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“…These motors have enhanced Brownian motion, and the effective diffusion coefficient is as high as 0.5 μm 2 s –1 . There are also studies on polymer decomposition or polymers acting as a carrier to promote the progress of MNMs. − …”

Section: Micro/nanomotors Are Propelled By Different Energiesmentioning

confidence: 99%

Application of Magnetic Micro/Nanomotors in Biomedicine

Tian,

Gao,

Wang

et al. 2024

ACS Appl. Nano Mater.

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Micro/nanomotors can convert different forms of energy into mechanical motion according to the controllable direction by different mechanisms. This new nanodevice is widely used in biomedical applications such as targeted drug delivery, biological imaging, diagnosis, and detection. Although the practical medical applications of these small devices are still in the initial stage, nanomotors manifest their great potential in biomedical applications. In particular, micro/nanomotors driven by magnetic force have great advantages in biomedicine because of their controllable movement direction. In this review, different energy driven micro/ nanomotors are classified, and the recent applications of magnetic micro/nanomotors in medicine are reviewed. Finally, the problems existing in the medical applications of magnetic micro/nanomotors and the possibilities for future development are discussed.

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“…Therefore, researchers have used different strategies to improve the mechanical stability of surfaces. − Zhang et al prepared a three-layer multifunctional superhydrophobic coating inspired by skin, which maintains excellent superhydrophobicity even in harsh environments . Pei et al prepared honeycomb porous structured SHSs by varying femtosecond laser parameters on functional polyimide-based films with triple double-sided characterization . Gu et al proposed a unit-cell design method that integrates structural and functional robustness in a single coating, where the superhydrophobicity and mechanical properties of the coating are enhanced by a unit cell composed of rigid microshells and nanoseeds .…”

Section: Introductionmentioning

confidence: 99%

“…16 Pei et al prepared honeycomb porous structured SHSs by varying femtosecond laser parameters on functional polyimide-based films with triple double-sided characterization. 17 Gu et al proposed a unit-cell design method that integrates structural and functional robustness in a single coating, where the superhydrophobicity and mechanical properties of the coating are enhanced by a unit cell composed of rigid microshells and nanoseeds. 18 Qing et al created mechanically stabilized microskeleton-nanofiller films by filling rough porous skeletons with a superhydrophobic medium to enhance the abrasion resistance and super-hydrophobicity of surfaces.…”

Section: ■ Introductionmentioning

confidence: 99%

Armored Superhydrophobic Surfaces with Excellent Drag Reduction in Complex Environmental Conditions

Wang,

Liu,

Guo

et al. 2024

Langmuir

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Superhydrophobic surfaces (SHSs) have possibilities for achieving significantly reduced solid–liquid frictional drag in the marine sector due to their excellent water-repelling properties. Although the stability of SHSs plays a key role in drag reduction, little consideration was given to the effect of extreme environments on the ability of SHSs to achieve drag reduction underwater, particularly when subjected to acidic conditions. Here, we propose interconnected microstructures to protect superhydrophobic coatings with the aim of enhancing the stability of SHSs in extreme environments. The stability of armored SHSs (ASHSs) was demonstrated by the contact angle and bounce time of droplets on superhydrophobic surfaces treated by various methods, resulting in an ASHS surface with excellent stability under extreme environmental conditions. Additionally, inspired by microstructures protecting superhydrophobic nanomaterials from frictional wear, the armored superhydrophobic spheres (ASSPs) were designed to explain from theoretical and experimental perspectives why ASSPs can achieve sustainable drag reduction and demonstrate that the ASSPs can achieve drag reduction of over 90.4% at a Reynolds number of 6.25 × 104 by conducting water entry experiments on spheres treated in various solutions. These studies promote a fundamental understanding of what drives the application of SHSs under extreme environmental conditions and provide practical strategies to maximize frictional drag reduction.

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Multifunctional polyimide-based femtosecond laser micro/nanostructured films with triple Janus properties

Abstract: We propose a facile method for manufacturing multifunctional Janus films using femtosecond lasers.

Cited by 30 publications

References 72 publications

Advanced Fog Harvesting Method by Coupling Plasma and Micro/Nano Materials

Advanced Fog Harvesting Method by Coupling Plasma and Micro/Nano Materials

Application of Magnetic Micro/Nanomotors in Biomedicine

Armored Superhydrophobic Surfaces with Excellent Drag Reduction in Complex Environmental Conditions

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