Droplet最新文献 - Book学术

Inside Back Cover, Volume 5, Number 1, January 2026 2026年1月第5卷第1期封底内

IF 9.1

Droplet Pub Date : 2026-01-21 DOI: 10.1002/dro2.70059

Sixiang Rao, Weiliang Zhi, Chengkai Hong, Yanan Du, Long Chen, Yuan Luo, Yifan Liu

引用次数: 0

Back Cover, Volume 5, Number 1, January 2026 封底，第五卷，第1期，2026年1月

IF 9.1

Droplet Pub Date : 2026-01-21 DOI: 10.1002/dro2.70060

Sin-Yung Siu, Yeonhui Choo, Chiu-Wing Chan, Xiaonan Liu, Chuanbo Hu, Zuankai Wang, Kangning Ren

引用次数: 0

Front Cover, Volume 5, Number 1, January 2026 2026年1月第5卷第1期封面

IF 9.1

Droplet Pub Date : 2026-01-21 DOI: 10.1002/dro2.70058

Yaolei Xiang, Benedikt Straub, Diego Cortes, Hans-Jürgen Butt, Kaloian Koynov

引用次数: 0

Inside Front Cover, Volume 5, Number 1, January 2026 2026年1月第5卷第1期封面内页

IF 9.1

Droplet Pub Date : 2026-01-21 DOI: 10.1002/dro2.70057

Zebing Mao, Chao Luo, Yanhong Peng, Yang Li, Yile Chen, Sirui Pan, Junji Ohgi, Weidi Huang, Jianhua Zhang, Bing Xu

引用次数: 0

Strategies for achieving real-world robustness in topologically engineered surfaces with special wettability 在具有特殊润湿性的拓扑工程表面中实现真实鲁棒性的策略

IF 9.1

Droplet Pub Date : 2026-01-14 DOI: 10.1002/dro2.70040

Sin-Yung Siu, Yeonhui Choo, Chiu-Wing Chan, Xiaonan Liu, Chuanbo Hu, Zuankai Wang, Kangning Ren

{"title":"Strategies for achieving real-world robustness in topologically engineered surfaces with special wettability","authors":"Sin-Yung Siu, Yeonhui Choo, Chiu-Wing Chan, Xiaonan Liu, Chuanbo Hu, Zuankai Wang, Kangning Ren","doi":"10.1002/dro2.70040","DOIUrl":"https://doi.org/10.1002/dro2.70040","url":null,"abstract":"Engineered topologies on superwetting with special wettability provide tailored functionalities and precise control over wetting and droplet behaviors, setting them apart from randomly structured surfaces. These features are crucial for applications requiring precision and efficiency, for example, directional droplet transport, anisotropic wetting, smart coating, thermal management, etc. Nonetheless, the reliance on engineered topographies renders these surfaces susceptible to structural damage, even at nano/micro-level, leading to functional deterioration in practical scenarios. This review specifically addresses durability challenges faced by the surfaces with engineered topologies, excluding random structures. We commence by examining robust strategies aimed at mitigating practical challenges encountered in real-world scenarios. Next, we outline the structural design principles that underpin these surfaces, integrating real-world examples from outdoor, underwater, and specialized applications are integrated to illustrate diverse approaches for tackling the multifaceted challenges. Finally, we analyze practical issues related to scaling up fabrication processes and identify areas for future research. By dissecting the intricate relationships between structural integrity, functional efficiency, and material selection, this review aims to provide a comprehensive understanding of durability issues. It also offers a strategic roadmap for enhancing the longevity of surfaces with special wettability in the real world, specifically focusing on those with engineered topologies while explicitly excluding random structures.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"5 1","pages":""},"PeriodicalIF":9.1,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large contact angle hysteresis enhances post-impact droplet oscillations 大接触角迟滞增强了液滴撞击后的振荡

IF 9.1

Droplet Pub Date : 2026-01-13 DOI: 10.1002/dro2.70047

Pengfei Zhao, Sai Raja Gopal Vadlamudi, Mi Zhou, Binyu Zhao, Jiu Huang, Günter K. Auernhammer, Uwe Hampel, Wei Ding

{"title":"Large contact angle hysteresis enhances post-impact droplet oscillations","authors":"Pengfei Zhao, Sai Raja Gopal Vadlamudi, Mi Zhou, Binyu Zhao, Jiu Huang, Günter K. Auernhammer, Uwe Hampel, Wei Ding","doi":"10.1002/dro2.70047","DOIUrl":"https://doi.org/10.1002/dro2.70047","url":null,"abstract":"Droplet impact on solid surfaces plays a critical role in a wide range of applications, including inkjet printing, spray cooling, surface coatings, and microdroplet chemistry. Precise control of droplet–surface interactions is essential, but the fundamental mechanisms governing this process are still not fully understood. In this study, we demonstrate that large contact angle hysteresis (CAH) on hydrophobic nanoporous surfaces significantly amplifies post-impact droplet oscillations. This reveals the critical influence of CAH on the redistribution of impact energy and the modulation of droplet–surface interactions. Using shape mode decomposition via Legendre polynomials and fast Fourier transform spectral analysis, we show that surfaces with larger CAH excite and sustain higher-order droplet shape mode oscillations, leading to persistent capillary waves even after contact line pinning. The observed amplitude modulation and multiple frequency components within individual shape modes reveal nonlinear energy transfer between different modes. These amplified and coupled oscillations are shown to promote daughter droplet coalescence. This study presents a framework for understanding the role of CAH in storing and redistributing impact energy through nonlinear mode excitation and establishes CAH as a critical design parameter for controlling fluid dynamics on solid surfaces.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"5 1","pages":""},"PeriodicalIF":9.1,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.70047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Droplet manipulation enabled by bio-inspired high-aspect-ratio micropumps via mold-assisted microfabrication 通过模具辅助微加工，由仿生高纵横比微泵实现液滴操作

IF 9.1

Droplet Pub Date : 2026-01-12 DOI: 10.1002/dro2.70049

Zebing Mao, Chao Luo, Yanhong Peng, Yang Li, Yile Chen, Sirui Pan, Junji Ohgi, Weidi Huang, Jianhua Zhang, Bing Xu

{"title":"Droplet manipulation enabled by bio-inspired high-aspect-ratio micropumps via mold-assisted microfabrication","authors":"Zebing Mao, Chao Luo, Yanhong Peng, Yang Li, Yile Chen, Sirui Pan, Junji Ohgi, Weidi Huang, Jianhua Zhang, Bing Xu","doi":"10.1002/dro2.70049","DOIUrl":"https://doi.org/10.1002/dro2.70049","url":null,"abstract":"Miniaturized functional fluidic pumps have found broad applications across various fields; however, the fabrication and dimensional limitations of their electrodes remain a significant challenge. Conventional manufacturing techniques often fail to achieve high aspect ratio structures exceeding 2 and electrode heights greater than 1 mm. In this work, we propose a novel extreme microfabrication strategy that integrates flexible molding techniques with advanced microfabrication processes to develop high-precision pump electrodes. These electrodes are successfully implemented in droplet manipulation applications. First, we selected suitable microfabrication-compatible materials and developed a conductive, flexible liquid elastomer, along with a tailored fabrication process. Next, a functional working fluid compatible with the electrodes was synthesized and characterized in terms of its viscosity, electrical conductivity, dielectric constant, and interfacial behavior with aqueous phases. A corresponding microfluidic chip was also fabricated to assess its droplet generation performance. Both duty cycle-based and frequency-based droplet manipulation strategies were investigated using this chip. Finally, a machine learning approach was employed to model the droplet generation process and evaluate the influence of four key parameters on device performance. This study establishes a foundational platform and design pathway for future development of integrated on-chip pumping systems in microfluidic applications.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"5 1","pages":""},"PeriodicalIF":9.1,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.70049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unveiling nanodroplet impact force on material interfaces 揭示纳米液滴对材料界面的冲击力

IF 9.1

Droplet Pub Date : 2026-01-05 DOI: 10.1002/dro2.70045

Zhifeng Hu, Haojiang Ran, Hanyi Liu, Bingqiang Ji, Jun Zhang, Fuqiang Chu

{"title":"Unveiling nanodroplet impact force on material interfaces","authors":"Zhifeng Hu, Haojiang Ran, Hanyi Liu, Bingqiang Ji, Jun Zhang, Fuqiang Chu","doi":"10.1002/dro2.70045","DOIUrl":"https://doi.org/10.1002/dro2.70045","url":null,"abstract":"Nanodroplet impact on nanoscale material interfaces is widely involved in nanoscience and nanotechnology, affecting the technical reliability through complicated liquid‒solid interaction force, that is, the droplet impact force. However, our understanding of the nanodroplet impact force is still blank. Herein, we reveal that the nanoscale size (∼10 nm) and high impact velocity (>100 m/s) of nanodroplets lead to unique characteristics of impact force, significantly differing from those of macrodroplets (∼1 mm). The nanodroplet impact force profile holds a single-peak feature, which is independent of droplet parameters and material wettability. The significant water-hammer pressure induces the abnormal rising of impact force, yielding unexpectedly high peak values governed by the Mach number (more than 10 orders of magnitude higher than droplet gravity). Our findings of droplet impact force at the nanoscale reveal the potential challenge of the damage of material surfaces by nanodroplet impact, highlighting one crucial factor for advancing nanolithography and nanoprinting.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"5 1","pages":""},"PeriodicalIF":9.1,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.70045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unified 1/2 scaling laws for droplet impact dynamics: From rigid to flexible thin films 液滴冲击动力学的统一1/2标度定律：从刚性薄膜到柔性薄膜

IF 9.1

Droplet Pub Date : 2026-01-02 DOI: 10.1002/dro2.70032

Junming Peng, Xianfu Huang, Quanzi Yuan

{"title":"Unified 1/2 scaling laws for droplet impact dynamics: From rigid to flexible thin films","authors":"Junming Peng, Xianfu Huang, Quanzi Yuan","doi":"10.1002/dro2.70032","DOIUrl":"https://doi.org/10.1002/dro2.70032","url":null,"abstract":"Droplet impact dynamics on solid surfaces, which are ubiquitously present in aerospace engineering, energy systems, agricultural production, etc., involve complex fluid–structure interactions. Herein, we employ a single-camera high-speed three-dimensional digital image correlation system to quantify the full-field deformations of flexible thin films during droplet impact dynamics. Experimental results revealed that the substrate flexibility not only reduces the maximum spreading diameter by 10% but also modulates rebound dynamics via energy competition between kinetic energy and surface adhesion energy, suggesting that coupled deformation of the solid–fluid interface plays an important role in the dynamic progress. We propose the structure-coupled response number (Sn), a governing dimensionless parameter unifying droplet spreading on both rigid and flexible films, validated by a universal 1/2 scaling law. A theoretical criterion for droplet rebound on hydrophobic flexible thin films is derived and experimentally demonstrated, which achieves the precise control of droplet rebound/non-rebound mode. This work bridges the theories of droplet impact dynamics on rigid and flexible substrates, offering a robust strategy to govern the droplet impact behaviors.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"5 1","pages":""},"PeriodicalIF":9.1,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.70032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly ordered micro-sphere films with finely tunable mono- to multi-layer for optical anti-counterfeiting 高度有序的微球膜，具有精细可调的单层到多层，用于光学防伪

IF 9.1

Droplet Pub Date : 2026-01-01 DOI: 10.1002/dro2.70038

Huanhuan Deng, Min Zhang, Xiaoxun Li, Xiao Wang, Ziqiu Fang, Lei Jiang, Huan Liu

{"title":"Highly ordered micro-sphere films with finely tunable mono- to multi-layer for optical anti-counterfeiting","authors":"Huanhuan Deng, Min Zhang, Xiaoxun Li, Xiao Wang, Ziqiu Fang, Lei Jiang, Huan Liu","doi":"10.1002/dro2.70038","DOIUrl":"https://doi.org/10.1002/dro2.70038","url":null,"abstract":"Highly ordered films of polystyrene (PS) micro-spheres have demonstrated various merits in optoelectronic devices, given their size- and thickness-dependent optical properties. So far, various solution strategies have been developed for making such highly ordered films, which have suffered from the lack of precise control on the film thickness (i.e., layer number of micro-spheres). Here, we developed a facile fibrous liquid bridge strategy for fabricating highly ordered PS micro-sphere films, featured as the finely tunable mono- to multi-layer. Guided by a horizontally placed fiber with both ends passing through a capillary tube, respectively, the solution was transferred steadily onto the target substrate forming a homogeneous liquid film, whose dewetting process thus confines the assembly of micro-spheres in a well-controllable manner. Depending on both the solution-shearing speed and the local concentration, a dynamic equilibrium between liquid transfer and evaporation was realized, which enables the formation of highly ordered micro-sphere films with finely tunable layer numbers. We demonstrated the angle-specific information encryption for anti-counterfeiting by utilizing patterned PS micro-sphere films that modulate structural colors based on layer-dependent optical responses. The result offers a new perspective for fabricating highly ordered film with tunable layers.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"5 1","pages":""},"PeriodicalIF":9.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.70038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0