Nanoengineered Surfaces for Robust Droplet TENGs: Mitigating Contamination and Improving Longevity

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

Abstract The droplet triboelectric nanogenerator (D‐TENG) harnesses energy from natural water droplets, though its performance and lifespan can be compromised by contamination on the functional layer. Water molecules have a strong affinity for polymer surfaces, which increases surface tension sliding‐off angle, leading to greater adhesion. As these droplets evaporate, they leave behind residues, such as calcium (Ca) magnesium (Mg) salts, that obscure surface, thereby diminishing electrification area altering dynamics—resulting in decreased electrical output. This study presents micro‐nanostructured D‐TENG with advanced anti‐fouling capabilities. By adding layer of metal nanoparticles followed ion etching fluorination grafting, retention accumulation are effectively minimized. demonstrates fourfold increase output compared predecessor. Following 10 000 interactions, original drops 53%, whereas variant only experiences 7% reduction. These enhancements provide significant insights applications contribute development strategies.

Language: Английский

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Clean Interfaces in Twisted Bilayer Graphene via Elastocapillary-Driven Directional Motion of Nanodroplets

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Layered van der Waals (vdW) materials, characterized by an ultrahigh surface-to-volume ratio and weak interlayer interaction, readily encapsulate ambient contaminants, resulting in the formation of nanodroplets. These intercalated nanodroplets disrupt coupling, thereby degrading material's physical properties. Consequently, achieving ultraclean vdW interface over a substantial area, particularly suspended presents significant challenge. In this study, we propose novel strategy that utilizes uniaxial stretching-induced curvature effect to direct motion within twisted bilayer graphene (TBLG). This phenomenon is associated with elastocapillarity, connection further evidenced observable changes droplets' morphology. deformed can move directionally response thermally stimulated opening interface, eventually leading TBLG sheets. Our approach not only facilitates mass transport at atomic channels but also enables achievement clean interfaces on large scale.

Language: Английский

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Covalently Grafted Slippery Surfaces for Transport of Large‐Volume Droplets and Bubbles

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract The directional transport and precise control of droplets bubbles are crucial for future applications, but remain challenging due to complex fluid dynamics application limits. In light existing research on droplet manipulation, a MnO 2 /carbon microsphere (MnO /Cs) covalently grafted lubricant‐infused slippery surface (SPM) is designed the manipulation bubbles. structure morphology /Cs examined using X‐ray diffraction (XRD) field‐emission scanning electron microscopy (FESEM), elemental composition chemical bonds compounds characterized by photoelectron spectroscopy (XPS), Raman spectra Fourier transform infrared spectrometer (FTIR). SPM with sliding angle as low 3° prepared. On SPM, rapid transportation small can be achieved, speed 5 µL reaching 1 mm s −1 round‐trip also being feasible. capable controlling 100 precision 0.49 , while 50 directed load mg. Moreover, volume 20 transported.

Language: Английский

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Nanogenerators via dynamic regulation of electrical double layer

Nano Trends, Journal Year: 2024, Volume and Issue: unknown, P. 100062 - 100062

Published: Nov. 1, 2024

Language: Английский

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Probing Leidenfrost effect via contact electrification

Nano Energy, Journal Year: 2024, Volume and Issue: 134, P. 110570 - 110570

Published: Dec. 11, 2024

Language: Английский

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