Droplet最新文献_第2页

Inside Back Cover, Volume 3, Number 3, July 2024 封底内页，第 3 卷第 3 号，2024 年 7 月

Droplet Pub Date : 2024-07-27 DOI: 10.1002/dro2.143

Sankara Arunachalam, Himanshu Mishra

引用次数: 0

Front Cover, Volume 3, Number 3, July 2024 封面，第 3 卷第 3 号，2024 年 7 月

Droplet Pub Date : 2024-07-27 DOI: 10.1002/dro2.140

Vijay Kumar, Qianxi Fu, Harrison Szeto, Yangying Zhu

引用次数: 0

Inside Front Cover, Volume 3, Number 3, July 2024 封面内页，第 3 卷第 3 号，2024 年 7 月

Droplet Pub Date : 2024-07-27 DOI: 10.1002/dro2.142

Minghao Li, Haoxu Yu, Zhirui Liu, Ziyue Gao, Faze Chen

引用次数: 0

Back Cover, Volume 3, Number 3, July 2024 封底，第 3 卷第 3 号，2024 年 7 月

Droplet Pub Date : 2024-07-27 DOI: 10.1002/dro2.141

Keli Zhang, Hengyu Xu, Jingcun Fan, Cancan Ouyang, Hengan Wu, Fengchao Wang

引用次数: 0

A strategy to drive nanoflow using Laplace pressure and the end effect 利用拉普拉斯压力和终端效应驱动纳米流的策略

Droplet Pub Date : 2024-06-17 DOI: 10.1002/dro2.136

Keli Zhang, Hengyu Xu, Jingcun Fan, Cancan Ouyang, Hengan Wu, Fengchao Wang

{"title":"A strategy to drive nanoflow using Laplace pressure and the end effect","authors":"Keli Zhang, Hengyu Xu, Jingcun Fan, Cancan Ouyang, Hengan Wu, Fengchao Wang","doi":"10.1002/dro2.136","DOIUrl":"https://doi.org/10.1002/dro2.136","url":null,"abstract":"Nanofluidics holds significant potential across diverse fields, including energy, environment, and biotechnology. Nevertheless, the fundamental driving mechanisms on the nanoscale remain elusive, underscoring the crucial importance of exploring nanoscale driving techniques. This study introduces a Laplace pressure-driven flow method that is accurately controlled and does not interfere with interfacial dynamics. Here, we first confirmed the applicability of the Young–Laplace equation for droplet radii ranging from 1 to 10 nm. Following that, a steady-state liquid flow within the carbon nanotube was attained in molecular dynamics simulations. This flow was driven by the Laplace pressure difference across the nanochannel, which originated from two liquid droplets of unequal sizes positioned at the channel ends, respectively. Furthermore, we employ the Sampson formula to rectify the end effect, ultimately deriving a theoretical model to quantify the flow rate, which satisfactorily describes the molecular dynamics simulation results. This research enhances our understanding on the driving mechanisms of nanoflows, providing valuable insights for further exploration in fluid dynamics on the nanoscale.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967964","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

Icephobic materials and strategies: From bio-inspirations to smart systems 疏水材料和策略：从生物吸气到智能系统

Droplet Pub Date : 2024-06-12 DOI: 10.1002/dro2.131

Xinlin Li, Yan Liu, Zhichun Zhang, Yanju Liu, Jinsong Leng

{"title":"Icephobic materials and strategies: From bio-inspirations to smart systems","authors":"Xinlin Li, Yan Liu, Zhichun Zhang, Yanju Liu, Jinsong Leng","doi":"10.1002/dro2.131","DOIUrl":"10.1002/dro2.131","url":null,"abstract":"Unwanted ice formations may cause severe functional degradations of facilities and also have a negative impact on their lifespans. Avoiding and removing ice accumulation is always a hot topic in the industrial and technological field. Bionic functional surfaces have been greatly studied for several decades and have proved to be excellent candidates for passive anti-/deicing applications. However, the drawbacks limit their potential industrial uses under harsh conditions, like low temperatures and high humidity. Most researches on bionic surfaces are focused on a certain function of natural creatures and their underlined fundamental theories are revealed by taking the interface as the static. Actually, living organisms, either plants or animals, are often sensitive and responsive to their surroundings, avoiding risks and even self-repairing upon damage. From this prospect, a novel view of the bionic icephobic materials has been proposed in the present review, which is expected to be studied and designed by taking the biological species as a system. As two representative icephobic materials, the anti-/deicing theories of superhydrophobic and slippery surfaces are first discussed. Further, the recent progress of smart icephobic strategies is summarized from interfaces to substrates. We aim to provide new bionic insights on designing future icephobic strategies.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141353836","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

Water droplets play a role in Internet of Things applications 水滴在物联网应用中发挥作用

Droplet Pub Date : 2024-06-06 DOI: 10.1002/dro2.133

Feng Wen, Chengkuo Lee

{"title":"Water droplets play a role in Internet of Things applications","authors":"Feng Wen, Chengkuo Lee","doi":"10.1002/dro2.133","DOIUrl":"10.1002/dro2.133","url":null,"abstract":"Water droplets help life in nature survive, thrive, and evolve. With water droplet serving as one of the indispensable elements in the Internet of Things (IoT), many droplet-oriented technologies, such as microfluidics, droplet manipulation, electrowetting, and energy harvesting, make rapid progress driven by material science, computer science, and medicine. Droplet-based wearable devices are endowed with advantages such as flexibility, sensing ability, and automation for various parameter detection. Besides, the continuous exploration of droplet manipulation has led to the emergence of a wide variety of manipulation methods. Meanwhile, electrowetting that utilizes external fields modifying liquid–solid surfaces has found its applications in various areas, including droplet transportation, microfabrication, and healthcare. The energy generation from water droplets also presents exciting opportunities for the development of novel electricity generators. These approaches for droplet utilization underscore the immense potentials and versatilities of droplet-based technologies in the IoT landscape. Hence, this mini review presents the fundamental droplet-based technologies by summarizing their working mechanisms and methods, device structures, and applications. Given the challenges in materials, fabrication, and system integration, this review shows the overall development roadmap in terms of improved functionality and performance and highlights the opportunities toward multifunctional, self-sustainable, and intelligent systems, which is called for IoT construction.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377563","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

Collective wetting transitions of submerged gas-entrapping microtextured surfaces 浸没式气体截留微纹理表面的集体润湿转变

Droplet Pub Date : 2024-06-04 DOI: 10.1002/dro2.135

Sankara Arunachalam, Himanshu Mishra

{"title":"Collective wetting transitions of submerged gas-entrapping microtextured surfaces","authors":"Sankara Arunachalam, Himanshu Mishra","doi":"10.1002/dro2.135","DOIUrl":"10.1002/dro2.135","url":null,"abstract":"Numerous natural and industrial processes entail the spontaneous entrapment of gas/air as rough/patterned surfaces are submerged under water. As the wetting transitions ensue, the gas diffuses into the water leading to the fully water-filled state. However, the standard models for wetting do not account for the microtexture's topography on collective wetting transitions. In other words, it is not clear whether the lifetime of n cavities arranged in a one-dimensional (I-D) line or a two-dimensional (II-D) (circular or square) lattice would be the same or not as a single 0-D cavity. In response, we tracked the time-dependent fates of gas pockets trapped in I-D and II-D lattices and compared them with wetting transitions in commensurate 0-D cavities. Interestingly, the collective wetting transitions in the I-D and the II-D arrays had a directionality such that the gas from the outermost cavities was lost the first, while the innermost got filled by water the last. In essence, microtexture's spatial organization afforded shielding to the loss of the gas from the innermost cavities, which we probed as a function of the microtexture's pitch, surface density, dimensionality, and hydrostatic pressure. These findings advance our knowledge of wetting transitions in microtextures and inspiring surface textures to protect electronic devices against liquid ingression.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.135","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141267501","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

Inertial mixing of acoustically levitated droplets for time-lapse protein crystallography 声学悬浮液滴的惯性混合，用于延时蛋白质晶体学研究

Droplet Pub Date : 2024-05-28 DOI: 10.1002/dro2.132

Soichiro Tsujino, Yohei Sato, Shichao Jia, Michal W. Kepa, Sofia Trampari, Takashi Tomizaki

{"title":"Inertial mixing of acoustically levitated droplets for time-lapse protein crystallography","authors":"Soichiro Tsujino, Yohei Sato, Shichao Jia, Michal W. Kepa, Sofia Trampari, Takashi Tomizaki","doi":"10.1002/dro2.132","DOIUrl":"https://doi.org/10.1002/dro2.132","url":null,"abstract":"Varying the chemical consistency of acoustically levitated droplets opens up an in situ study of chemical and biochemical reactions in small volumes. However, the optimization of the mixing time and the minimization of the positional instability induced by solution dispensing are necessary for practical applications such as the study of the transient state of macromolecules crystallography during the ligand binding processes. For this purpose, we study the inertial mixing in a configuration compatible with the room-temperature crystallography using the acoustic levitation diffractometer, therein solution drops ejected at high velocity collide and coalesce with droplets dispensed on acoustically levitated and rotating polymer thin-film sample holders. With the proposed method, we are able to achieve the mixing time of ∼0.1 s for sub-micro and a few microliter droplets. The observed short mixing time is ascribed to the rapid penetration of the solution into the droplets and confirmed by a computational fluid dynamic simulation. The demonstrated accelerated solution mixing is tested in a pilot time-lapse protein crystallography experiment using the acoustic levitation diffractometer. The results indicate the detection of transient ligand binding state within 2 s after the solution dispensing, suggesting the feasibility of the proposed method for studying slow biochemical processes.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967638","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

Quantitative liquid storage by billiards-like droplet collision on surfaces with patterned wettability 在具有图案化润湿性的表面上，通过类似台球的液滴碰撞实现定量液体储存

Droplet Pub Date : 2024-05-28 DOI: 10.1002/dro2.125

Minghao Li, Haoxu Yu, Zhirui Liu, Ziyue Gao, Faze Chen

{"title":"Quantitative liquid storage by billiards-like droplet collision on surfaces with patterned wettability","authors":"Minghao Li, Haoxu Yu, Zhirui Liu, Ziyue Gao, Faze Chen","doi":"10.1002/dro2.125","DOIUrl":"https://doi.org/10.1002/dro2.125","url":null,"abstract":"There has been significant interest in researching droplet transport behavior on composite wetting surfaces. However, current research is primarily focused on modifying individual droplets and lacks an in-depth investigation into high-precision droplet storage. This study introduces a “billiard ball” droplet transport and storage platform (TSP) with differentiated areas. Within this platform, the volume of droplets stored in the area reaches a consistent threshold through droplet “scrambling,” inspired by the water-gathering behavior of spiders. The TSP involves connecting two regions of different sizes using a three-dimensional stepped wedge angle structure. However, this connection is not seamless, leaving a 2-mm gap between the regions. This gap is intentionally designed to enable continuous droplet transfer while preventing any static migration. Through systematic experimental and simulation analysis, we investigated the influence of superhydrophilic pattern structures and parameters on quantitative droplet storage. We established a functional relationship between the pattern area and the stored volume, and analyzed the intrinsic mechanism of droplet collision separation. This enabled us to achieve on-demand quantitative droplet storage and autonomize the storage process. The “billiard ball” droplet transport–storage platform proposed in this study holds promising applications in the fields of biomedical and organic chemistry.","PeriodicalId":100381,"journal":{"name":"Droplet","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dro2.125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967639","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