共查询到20条相似文献，搜索用时 0 毫秒
1.
Pu Guo Zubin Wang Liping Heng Yuqi Zhang Xuan Wang Lei Jiang 《Advanced functional materials》2019,29(11)
Smart manipulation of liquid/bubble transport has garnered widespread attention due to its potential applications in many fields. Designing a responsive surface has emerged as an effective strategy for achieving controllable transport of liquids/bubbles. However, it is still challenging to fabricate stable amphibious responsive surfaces that can be used for the smart manipulation of liquid in air and bubbles underwater. Here, amphibious slippery surfaces are fabricated using magnetically responsive soft poly(dimethylsiloxane) doped with iron powder and silicone oil. The slippery gel surface retains its magnetic responsiveness and demonstrates strong affinity for bubbles underwater but shows small and switching resistance forces with the water droplets in air and bubbles underwater, which is the key factor for achieving the controllable transport of liquids/bubbles. On the slippery gel surface, the sliding behaviors of water droplets and bubbles can be reversibly controlled by alternately applying/removing an external magnetic field. Notably, compared with slippery liquid‐infused porous surfaces, the slippery gel surface demonstrates outstanding stability, whether in air or underwater, even after 100 cycles of alternately applying/removing the magnetic field. This surface shows potential applications in gas/liquid microreactors, gas–liquid mixed fluid transportation, bubble/droplet manipulation, etc. 相似文献
2.
Chao Chen Zhouchen Huang Lu‐An Shi Yunlong Jiao Suwan Zhu Jiawen Li Yanlei Hu Jiaru Chu Dong Wu Lei Jiang 《Advanced functional materials》2019,29(40)
Unidirectional underwater gas bubble (UGB) transport on a surface is realized by buoyant force or wettability gradient force (Fwet‐grad) derived from a tailored geography. Unfortunately, intentional control of the UGB over transport speed, direction, and routes on horizontal planar surfaces is rarely explored. Herein reported is a light‐responsive slippery lubricant‐infused porous surface (SLIPS) composed of selective lubricants and super‐hydrophobic micropillar‐arrayed Fe3O4/polydimethylsiloxane film. Upon this SLIPS, the UGB can be horizontally actuated along arbitrary directions by remotely loading/discharging unilateral near‐infrared (NIR) stimuli. The underlying mechanism is that Fwet‐grad can be generated within 1 s in the presence of a NIR‐trigger due to the photothermal effect of Fe3O4. Once the NIR‐stimuli are discharged, Fwet‐grad vanishes to break the UGB on the SLIPS. Moreover, performed are systematic parameter studies to investigate the influence of bubble volume, lubricant rheology, and Fwet‐grad on the UGB steering performance. Fundamental physics renders the achievement of antibuoyancy manipulation of the UGBs on an inclined SLIPS. Significantly, steering UGBs by horizontal SLIPS to configurate diverse patterns, as well as facilitating light‐control‐light optical shutter, is deployed. Compared with the previous slippery surfaces, light‐responsive SLIPS is more competent for manipulating UGBs with controllable transport speed, direction, and routes independent of buoyancy or geography derivative force. 相似文献
3.
Designing functional interfaces to control solid/fluid interactions has emerged as an indispensable strategy for developing advanced materials and optimizing current technologies. Surfaces exhibiting special wettability offer many paradigms for regulating fluid behavior in practical applications including oil–water separation and fog harvesting. Nevertheless, the flexible manipulation of air bubbles under water still has room for further exploration. Here, it is reported that the lubricant‐infused slippery (LIS) surface with water repellency is applicable to manipulate bubbles in an aqueous environment. On the basis of the sufficient bubble adhesion, the shaped LIS tracks can be used in guiding the bubble delivery and facilitating continuous bubble distribution. Through the incorporation of an asymmetrical structure into the LIS surface, a triangle‐shaped bubble holder is capable of controlling a single bubble with ease. Moreover, the LIS surface is integrated with a H2 microbubble evolving apparatus, demonstrating a potential method for in situ capture and delivery of microbubbles. The current finding reveals the meaningful interaction between underwater bubbles and the LIS surface, providing several examples for the applications of this bubble carrier, which should shed new light on the development of bubble‐controlling interfaces. 相似文献
4.
《Advanced functional materials》2018,28(35)
A photoresponsive organogel surface (POS), which integrates characteristics of the photothermal property of Fe3O4 nanoparticles and the low hysteresis feature of lubricant‐infused organogels, is shown. A photothermally induced dynamic temperature gradient can be formed rapidly at the location of near‐infrared‐light irradiation (NIR) on POS with suitable Fe3O4 nanoparticles content. Thus, various droplets (e.g., water, glycerol, ethylene glycol, propylene glycol, and ethanol) can be transported effectively and nimbly (e.g., along desired trajectories with controllable velocity and direction, even run uphill and deliver solid particles). This work reveals a synergistic effect between the asymmetrical droplet deformation and the inside Marangoni flows, which forms a unique driving force for droplet transport with high efficiency. This finding offers insight into the design of novel responsive interface materials for droplet transportation, which would be significant for laboratory‐on‐a‐chip contexts, mass transportation, and microengines. 相似文献
5.
该文利用光热转换六硼化镧（LaB6）、加拿大树脂、纳米SiO2,制备了不同掺杂含量的LaB6-SiO-加拿大树脂溶胶,并涂敷在塑料光纤表面,构成了光致发光发热光分频利用光纤。测试了LaB6颗粒的吸收光谱及升温速率,LaB6掺杂含量与涂敷层厚度对光纤表面发光发热性能的影响。LaB6在波长为510~650 nm时出现弱吸收,用于光辐射;LaB6对其他可见 近红外波段的光呈现出强吸收,用于产热。当LaB6的质量分数为0.30%,涂敷层厚为200 μm时,光纤表面发光发热的均匀性最佳,观测点的平均发光强度及平均升温速率分别达到26.59 μW/cm2和0.29 ℃/min,实现了可见 近红外光谱的光分频利用。 相似文献
6.
Vahid Nasirimarekani Fernando Benito-Lopez Lourdes Basabe-Desmonts 《Advanced functional materials》2021,31(32):2100178
The manipulation of droplets via a magnetic field forms the basis of a fascinating technology that is currently in development. Often, the movement of droplets with magnets involves adding magnetic particles in or around the droplet; alternatively, magneto responsive surfaces may also be used. This work, presents and characterizes experimentally the formation and properties of a tunable superparamagnetic ring (tSPRing), which precisely adjusts itself around a water droplet, due to liquid–liquid interaction, and enables the physical manipulation of droplets. The ring is made of an oil-based ferrofluid, a stable suspension of ferromagnetic particles in an oily phase. It appears spontaneously due to the oil–water interfacial interaction under the influence of a magnetic field. The ferrofluid–water interaction resembles a cupcake assembly, with the surrounding ring only at the base of the droplet. The ring is analogous to a soft matter ring magnet, showing dipole repulsive forces, which stabilizes the droplets on a surface. It enables robust, controllable, and programmable manipulation of enclosed water droplets. This work opens the door to new applications in open surface upside or upside-down microfluidics and lays the groundwork for new studies on tunable interfaces between two immiscible liquids. 相似文献
7.
Ruijie Wang Fan Jin Yufen Li Junkai Gong Hua Lai Yuyan Liu Zhongjun Cheng 《Advanced functional materials》2023,33(49):2305766
The phenomenon of controlled droplet transport has promising application prospects in various fields. Active droplet transport mode is controllable through continuous external stimuli. By contrast, self-transport is a more environmentally friendly and energy-efficient passive transport mode but lacks controllability. In this study, controlled self-transport is achieved by constructing a shape memory polymer (SMP) tube with a lubricated magnetic-responsive gel inner surface. The asymmetrical shape of the tube, combined with the lubricated inner surface, enables directional self-transport of droplets without external stimuli. Furthermore, the resistance on the inner gel surface can be altered by regulating the magnetic field to achieve effective active control during the self-transport process. Thus, smart in situ control of droplet transport can be achieved by integrating the macroscale shape variation of the tube with the dynamic control of the inner surface microstructure. Owing to the fast magnetic responsivity and in situ controllability of the self-transport process, the SMP lubricated tube demonstrates the ability to transport a variety of liquids and can be designed as a micro-reactor for step-by-step droplet detection. The findings of this study may provide guidance for the development of intelligent interface materials and microfluidic devices. 相似文献
8.
Wenjie Li Jinghan Li Lingling Ding Xinyi Zhu Ruixue Sun Kun Chang 《Advanced functional materials》2024,34(52):2411387
This study presents the design and synthesis of a hydrogel composite optimized for Interface Solar Steam Generation (ISSG), merging photothermal MoS2 hollow nanospheres, enhanced via polydopamine (PDA) coating for superior light absorption, with a polyvinyl alcohol (PVA) hydrogel matrix. The composite achieves a photothermal conversion efficiency of 95.6% at the interface, highlighting its effectiveness in solar energy harvesting. Under 1 kW m⁻2 solar irradiance, remarkable evaporation rates of 5.41 kg m⁻2 h⁻¹ (pure water) and 5.07 kg m⁻2 h⁻¹ (seawater) are recorded, alongside conversion efficiencies of 93.7% and 90.8%. Outdoor testing confirms a steady freshwater production at 3.11 kg m⁻2 h⁻¹. Incorporating the photothermal evaporation coupled with water splitting for hydrogen production, this system effectively mitigates the corrosive effects of chloride ions typically encountered in seawater, ensuring the integrity of the catalyst and thereby maintaining a high hydrogen production rate of 45.5 mmol m⁻2 h⁻¹. It exemplifies a sophisticated approach to balancing thermal dynamics and water transportation in solar evaporation technology. By demonstrating the feasibility of concurrent efficient photothermal evaporation and catalytic hydrogen production, this research introduces a pivotal strategy for enhancing the practicality and versatility of ISSG systems, thereby advancing sustainable energy and water treatment solutions. 相似文献
9.
1 引言 激光光热位移光谱法是一项高灵敏度高分辨率和无损伤无接触的新型激光光谱探测方法,已成功地应用于表层、亚表层和薄膜的光热特性研究。它的研究对象主要是固体样品。本工作把光热位移光谱法扩展到液体样品,采用测量光束偏转的方法研究了重油类的表面光 相似文献
10.
Xiao-Dan Liu Bei Chen Gang-Gang Wang Song Ma Li Cheng Wei Liu Li Zhou Qu-Quan Wang 《Advanced functional materials》2021,31(43):2104424
Integrating multiple mechanisms to maximize photothermal conversion efficiency is a significant strategy but remains challenging to construct therapeutic agents toward photothermal tumor treatment. Here, an approach to synthesize asymmetric Bi2Se3/CdSe-Au hierarchical nanorods with excellent photothermal conversion is reported. Ag wetting-layer is firstly grown to help overcome the interfacial lattice mismatch and promote the site-selective growth of AgCdSe onto one end or side surface of Au nanorods. Subsequently, extraction of Ag+ ions out of lattice is observed during cation exchange reaction and epitaxial growth of Bi2Se3 shell. Bi2Se3/CdSe heterojunction with type-II band alignment is formed and located at the plasmonic hotspots of Au nanorods, which experiences enhanced light absorption and accelerates the charge separation of photo-excited carriers. Under excitation of near-infrared 808 nm laser, the matchstick-like Bi2Se3/CdSe-Au nanorods show an excellent photothermal conversion, with 4.3 times temperature increment ( Δ T) than that of bare Au nanorods. Moreover, in vitro and in vivo experiments verify them as excellent photothermal therapeutic agents. 相似文献
11.
Directional transportation and collection of liquids and bubbles are highly desirable in human life and industrial production. As one of the most promising types of functional surfaces, the reported anisotropic slippery liquid‐infused porous surfaces (SLIPSs) demonstrate unique advantages in liquid directional transportation. However, anisotropic SLIPSs readily suffer from the depletion of lubricant when used to manipulate droplets and bubbles, which leads to unstable surface properties. Therefore, fabricating stable anisotropic slippery surfaces for the directional transportation of drops and bubbles remains a challenge. Here, stable anisotropic covalently grafted slippery surfaces are fabricated by grafting polydimethylsiloxane molecular brushes onto directional microgrooved surfaces. The fabricated surfaces show remarkable anisotropic omniphobic sliding behaviors towards droplets with different surface tensions ranging from 72.8 to 37.7 mN m?1 in air and towards bubbles underwater. Impressively, the surface maintains outstanding stability for the transportation of droplets (in air) and air bubbles (underwater) even after 240 d. Furthermore, anisotropic self‐cleaning towards various dust particles in air and directional bubble collection underwater are achieved on this surface. This stable anisotropic slippery surface has great potential for applications in the directional transportation of liquids and bubbles, microfluidic devices, directional drag reduction, directional antifouling, and beyond. 相似文献
12.
13.
Xueshan Jing Huawei Chen Liwen Zhang Song Zhao Yan Wang Zelinlan Wang Yu Zhou 《Advanced functional materials》2023,33(9):2210883
Droplet manipulation has gradually drawn worldwide attention through diverse potential applications such as microfluidics, and medical diagnostic test. Whereas, the high-precision liquid manipulation on an open surface that is under control at will is still a huge challenge, especially in 3D. Herein, the novel magnetic micropillars array (MMA) is developed for multi-dimensional droplet manipulation, depending on huge symmetric bending deformation under the low magnetic field. In situ observation demonstrated the droplet's behavior and the driving force acted on the droplet is derived from these micropillar's deformation. Two modes, that are, propelling mode and rolling mode are found in horizontal transport that determined by the relative position of crest and droplets and can be transported with excellent accuracy and rapidity. The recombination of the contact liquid between droplets and micropillars occurs in swinging to dynamically adjust the length of the three-phase contact line, which is the main reason for capture-release behavior. Theoretical models of multi-dimensional droplet manipulation are systematically established to demonstrate the underlying mechanism. Finally, several MMA-based operating platforms are built to validate its feasibility in accurate 3D droplet manipulation and exhibit great potential in chemical micro-reactions, bioassays, and the medical field. 相似文献
14.
Moyuan Cao Kan Li Zhichao Dong Cunming Yu Shuai Yang Cheng Song Kesong Liu Lei Jiang 《Advanced functional materials》2015,25(26):4114-4119
Antigravity transportation of water, which is often observed in nature, is becoming a vital demand for advanced devices and new technology. Many studies have been devoted to the motion of a single droplet on a horizontal or inclined substrate under specific assistance. However, the self‐propelled water motion, especially continuous antigravity water delivery, still remains a considerable challenge. Here, a novel self‐ascending phenomenon driven only by the surface energy release of water droplets is found, and a superhydrophobic mesh to pump water up to a height of centimeter scale is designed. An integrated antigravity transportation system is also demonstrated to continuously and spontaneously pump water droplets without additional driving forces. The present novel finding and integrated devices should serve as a source of inspiration for the design of advanced materials and for the development of new technology with exciting applications in microfluidics, microdetectors, and intelligent systems. 相似文献
15.
Bioinspired lubricant‐infused surfaces exhibit various unique properties attributed to their liquid‐like and molecularly smooth nature. Excellent liquid repellency and “slippery” properties, self‐healing, antiicing, anticorrosion characteristics, enhanced heat transfer, antibiofouling, and cell‐repellent properties have been already demonstrated. This progress report highlights some of the recent developments in this rapidly growing area, focusing on properties of lubricant‐infused surfaces, and their emerging applications as well as some future challenges. 相似文献
16.
黄铜是工业产品的重要基础性材料之一,其抗盐腐蚀性能的提升问题,近年来受到工业界和科研界的广泛关注。本文提出一种制备黄铜抗盐腐蚀涂层方法。首先,利用纳秒激光诱导出了具有微纳织构的黄铜超疏水表面,并用氟硅烷进行修饰增强其稳定性;然后在制备的超疏水性基体中注入硅油,获得超疏水光滑涂层表面;最后,浸入35wt% NaCl溶液中进行PDP和EIS测试,结果表明光滑表面的抗盐腐蚀性能优于普通超疏水表面,更优于原始黄铜表面。本研究可对金属防腐涂层发展起到一定的促进作用,对于激光诱导制备超疏水光滑表面具有重要意义,为工业领域的金属防腐蚀途径提供了方便和有效的手段。 相似文献
17.
Wenxiang Zhai Min Xu Yijing Zhong Kun Zhang Jinming Li Kejiao Ding Xinli Wei Liping Cai Changlei Xia 《Advanced functional materials》2023,33(47):2305198
In cellulose-based plastics, as a type of thermoplastic and thermosetting materials, the excellent balance of mechanical strength and ductility poses a large challenge. To tackle this problem, a novel approach is devised to introduce reversible non-covalent ester cross-linking into dynamic covalent hydrogen-bonded polymer networks. However, the formation of ester bonds typically requires excess reactants and dehydrating agents, which is energy-intensive, environmentally harmful, and costly. To address these concerns, inspired by polyester-rich plant bark, a supramolecular composite material is developed. It can be dissolved and regenerated using a binary solvent system (choline hexanoate/choline chloride-oxalic acid). In water, this supramolecular composite material underwent self-healing and ester exchange reactions to form double-cross-linked networks, interfaced with photo-thermal catalysis promoting the reaction due to its high photo-thermal conversion efficiency (86.7%) and water evaporation rate (1.38 kg m−2 h−1). This enables the rapid and repeatable construction of durable and stretchable biomaterials. The mechanical properties of the supramolecular plastic can be adjusted by solar photo-thermal conditions of the synthesis environment. These materials exhibit high performance in solar water evaporation and have self-healing properties and are degradable, recyclable, and capable of eliminating their own adhesions. 相似文献
18.
Chao Chen Hao Yao Yan Chen Long Zhang Sijia Guo Sizhu Wu Shuyi Li Zhaoxin Lao Chenchu Zhang 《Advanced functional materials》2023,33(49):2308314
Slippery liquid-infused porous surfaces (SLIPS) derived smart windows (SWs) that dynamically fine-tune the solar spectrum are promising candidates for alleviating the global energy crisis, especially for dim rainy climates. Unfortunately, the inferior durability, high energy-consumption, and slow tune-responsivity over SLIPS-based SWs greatly hinder their practical usage. Reported is an ultrarobust omni-liquid-repellent magnetism-actuated reconfigurable microshutters (OLR-MARS) via integrating a femtosecond laser ablation and soft-lithography technique. By alternately loading/discharging a remote magnet, OLR-MARS can be reversibly switched between a transparent mode and an opaque mode within 0.03 s, which is far sensitive than the previously-reported SWs. Simultaneously, OLR-MARS can harness the surface liquids between a slippery state (the sliding angle of ≈15o) and a sticky one (pinning at a tilt angle of 90o). Significantly, owing to its all-solid-state merit, OLR-MARS demonstrates good longevity even when subjected to the raindrops impact above 1000 cycles. Results indicate dual switching over the interfacial hydrodynamics and optics. Last but not least, leveraging the optimized OLR-MARS, encryption-decryption, thermal management, and an angle-dependent privacy-screen is deployed. Current novel OLR-MARS with robust durability, fast responsivity, and energy-free advantages holds promising potential in self-cleaning smart windows, energy-saving buildings, antivoyeurism, etc. 相似文献
19.
Dong-Dong Han;Yong-Lai Zhang;Zhao-Di Chen;Ji-Chao Li;Jia-Nan Ma;Jiang-Wei Mao;Hao Zhou;Hong-Bo Sun 《光电进展（英文版）》2023,6(1):210163-1-210163-11
Carnivorous plants, for instance,Dionaea muscipulaandNepenthespitcher plant, inspired the innovation of advanced stimuli-responsive actuators and lubricant-infused slippery surfaces, respectively. However, hybrid bionic devices that combine the active and passive prey trapping capabilities of the two kinds of carnivorous plants remain a challenge. Herein, we report a moisture responsive shape-morphing slippery surface that enables both moisture responsive shape-morphing and oil-lubricated water repellency for simultaneous active- and passive-droplet manipulation. The moisture deformable slippery surface is prepared by creating biomimetic microstructures on graphene oxide (GO) membraneviafemtosecond laser direct writing and subsequent lubricating with a thin layer of oil on the laser structured reduced GO (LRGO) surface. The integration of a lubricant-infused slippery surface with an LRGO/GO bilayer actuator endows the actuator with droplet sliding ability and promotes the moisture deformation performance due to oil-enhanced water repellency of the inert layer (LRGO). Based on the shape-morphing slippery surface, we prepared a series of proof-of-concept actuators, including a moisture-responseDionaea muscipulaactuator, a smart frog tongue, and a smart flower, demonstrating their versatility for active/passive trapping, droplet manipulation, and sensing. 相似文献
20.
Sunjie Ye Gemma Marston James R. McLaughlan Daniel O. Sigle Nicola Ingram Steven Freear Jeremy J. Baumberg Richard J. Bushby Alexander F. Markham Kevin Critchley Patricia Louise Coletta Stephen D. Evans 《Advanced functional materials》2015,25(14):2117-2127
Important aspects in engineering gold nanoparticles for theranostic applications include the control of size, optical properties, cytotoxicity, biodistribution, and clearance. In this study, gold nanotubes with controlled length and tunable absorption in the near‐infrared (NIR) region have been exploited for applications as photothermal conversion agents and in vivo photoacoustic imaging contrast agents. A length‐controlled synthesis has been developed to fabricate gold nanotubes (NTs) with well‐defined shape (i.e., inner void and open ends), high crystallinity, and tunable NIR surface plasmon resonance. A coating of poly(sodium 4‐styrenesulfonate) (PSS) endows the nanotubes with colloidal stability and low cytotoxicity. The PSS‐coated Au NTs have the following characteristics: i) cellular uptake by colorectal cancer cells and macrophage cells, ii) photothermal ablation of cancer cells using single wavelength pulse laser irradiation, iii) excellent in vivo photoacoustic signal generation capability and accumulation at the tumor site, iv) hepatobiliary clearance within 72 h postintravenous injection. These results demonstrate that these PSS‐coated Au NTs have the ideal attributes to develop their potential as effective and safe in vivo imaging nanoprobes, photothermal conversion agents, and drug delivery vehicles. To the best of knowledge, this is the first in vitro and in vivo study of gold nanotubes. 相似文献