1
|
Wen K, Chen X, Cheng S, Wang X, Ma H, Song Q, Zhao Q, Tian H, Zhang J, Shao J. Modulation of wetting state switching of droplets on superhydrophobic microstructured surfaces by external electric field. J Colloid Interface Sci 2024; 672:533-542. [PMID: 38852354 DOI: 10.1016/j.jcis.2024.05.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 05/28/2024] [Accepted: 05/30/2024] [Indexed: 06/11/2024]
Abstract
HYPOTHESIS Electrowetting on conventional dielectrics requires direct fluid-electrode contact to generate strong electric fields at the three-phase contact line to modulate the wetting. Since the electric field alters wetting, the modulation of wetting can be achieved by applying an external electric field through insulated electrodes, preventing the liquid from contacting the electrodes. EXPERIMENT A simple and efficient method for non-contact between the fluid and the electrode external electric field modulation of fluid wetting was proposed. The switching ability of droplets on microgroove surfaces from Cassie-Baxter to Wenzel wetting state under an external electric field was used to drive and quantify the relationship between wetting, contact angle, and the applied voltage. FINDINGS Applying an external electric field modulates the wetting of deionized water, ionic liquids, and high-viscosity liquids on microgrooves. The wetting degree of liquid can be controlled by adjusting the external voltage parameters. The finite element simulations revealed that the Maxwell force drove this process. The effects of substrate size and liquid properties on wetting behavior were also examined. Post-application cross-sectional imaging showed the formation of a conformal interface, highlighting the relevance of the proposed method in advanced adaptive shape fabrication and microfluidic control, among other applications.
Collapse
Affiliation(s)
- Kaiqiang Wen
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Xiaoming Chen
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; XJTU-POLIMI Joint School of Design and Innovation, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Siyi Cheng
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Xin Wang
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Hechuan Ma
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Qihang Song
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Quanyi Zhao
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Hongmiao Tian
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Jie Zhang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Jinyou Shao
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| |
Collapse
|
2
|
Chahal S, Sahay T, Li Z, Sharma RK, Kumari E, Bandyopadhyay A, Kumari P, Jyoti Ray S, Vinu A, Kumar P. Graphene via Microwave Expansion of Graphite Followed by Cryo-Quenching and its Application in Electrostatic Droplet Switching. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2404337. [PMID: 38958089 DOI: 10.1002/smll.202404337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/13/2024] [Indexed: 07/04/2024]
Abstract
Monoelemental atomic sheets (Xenes) and other 2D materials offer record electronic mobility, high thermal conductivity, excellent Young's moduli, optical transparency, and flexural capability, revolutionizing ultrasensitive devices and enhancing performance. The ideal synthesis of these quantum materials should be facile, fast, scalable, reproducible, and green. Microwave expansion followed by cryoquenching (MECQ) leverages thermal stress in graphite to produce high-purity graphene within minutes. MECQ synthesis of graphene is reported at 640 and 800 W for 10 min, followed by liquid nitrogen quenching for 5 and 90 min of sonication. Microscopic and spectroscopic analyses confirmed the chemical identity and phase purity of monolayers and few-layered graphene sheets (200-12 µm). Higher microwave power yields thinner layers with enhanced purity. Molecular dynamics simulations and DFT calculations support the exfoliation under these conditions. Electrostatic droplet switching is demonstrated using MECQ-synthesized graphene, observing electrorolling of a mercury droplet on a BN/graphene interface at voltages above 20 V. This technique can inspire the synthesis of other 2D materials with high purity and enable new applications.
Collapse
Affiliation(s)
- Sumit Chahal
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
- Indian Institute of Technology Hyderabad, Kandi, Hyderabad, 502284, India
| | - Trisha Sahay
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
| | - Zhixuan Li
- Global Innovative Centre for Advanced Nanomaterials (GICAN), University of Newcastle, Callaghan, 2308, Australia
| | - Raju Kumar Sharma
- Department of Mechanical Engineering, Government Engineering College Sheohar, Chhatauna Bisunpur, Block- Piprahi, Sheohar, Bihar, 843329, India
| | - Ekta Kumari
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
| | - Arkamita Bandyopadhyay
- Institut für Physik, Theoretische Physik, Martin-Luther-Universität Halle-Wittenber, 06120, Halle, Germany
| | - Puja Kumari
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
| | - Soumya Jyoti Ray
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials (GICAN), University of Newcastle, Callaghan, 2308, Australia
| | - Prashant Kumar
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
- Global Innovative Centre for Advanced Nanomaterials (GICAN), University of Newcastle, Callaghan, 2308, Australia
| |
Collapse
|
3
|
Hou L, Liu X, Ge X, Hu R, Cui Z, Wang N, Zhao Y. Designing of anisotropic gradient surfaces for directional liquid transport: Fundamentals, construction, and applications. Innovation (N Y) 2023; 4:100508. [PMID: 37753526 PMCID: PMC10518492 DOI: 10.1016/j.xinn.2023.100508] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 09/01/2023] [Indexed: 09/28/2023] Open
Abstract
Many biological surfaces are capable of transporting liquids in a directional manner without energy consumption. Inspired by nature, constructing asymmetric gradient surfaces to achieve desired droplet transport, such as a liquid diode, brings an incredibly valuable and promising area of research with a wide range of applications. Enabled by advances in nanotechnology and manufacturing techniques, biomimetics has emerged as a promising avenue for engineering various types of anisotropic material system. Over the past few decades, this approach has yielded significant progress in both fundamental understanding and practical applications. Theoretical studies revealed that the heterogeneous composition and topography mainly govern the wetting mechanisms and dynamics behavior of droplets, including the interdisciplinary aspects of materials, chemistry, and physics. In this review, we provide a concise overview of various biological surfaces that exhibit anisotropic droplet transport. We discussed the theoretical foundations and mechanisms of droplet motion on designed surfaces and reviewed recent research advances in droplet directional transport on designed plane surfaces and Janus membranes. Such liquid-diode materials yield diverse promising applications, involving droplet collection, liquid separation and delivery, functional textiles, and biomedical applications. We also discuss the recent challenges and ongoing approaches to enhance the functionality and application performance of anisotropic materials.
Collapse
Affiliation(s)
- Lanlan Hou
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
- School of Printing and Packaging Engineer, Beijing Institute of Graphic Communication, Beijing 102600, China
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaofei Liu
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Xinran Ge
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Rongjun Hu
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang 330096, China
| | - Zhimin Cui
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Nü Wang
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Yong Zhao
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bioinspired Energy Materials and Devices, School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| |
Collapse
|
4
|
Rummaneethorn P, Lee D. Dielectric charge injection (DCI)-enabled contactless droplet wetting modulation for droplet-surface material interchange. J Colloid Interface Sci 2023; 639:241-248. [PMID: 36805749 DOI: 10.1016/j.jcis.2023.02.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 02/08/2023]
Abstract
HYPOTHESIS Electrowetting-on-dielectric (EWOD) employs direct droplet-electrode contact to generate electric fields across the dielectric layer to modulate droplet wetting. Because the charged surface state drives this process, it should be possible to accomplish a contactless modulation of droplet wetting by charge injection onto the dielectric surface where a droplet is situated. EXPERIMENTS We present our technique, dielectric charge injection (DCI), to contactlessly modulate droplet wetting via corona discharge-based physics. We study the ability of droplets on nonwetting surfaces to transition to a wetting state under DCI, quantify contact angle (CA) in relation to applied voltage, and examine reversibility under regimes with and without charge injection. The observed phenomena are applied to enable droplet-surface material interchange. FINDINGS Using DCI, we induce wetting of a deionized water droplet on a non-wetting polydimethylsiloxane (PDMS) surface immersed in hexadecane, with tunable CA modulation based on applied voltage. Upon simple removal of the voltage and/or conductor, droplet fully recovers the initial non-wetting state. We combine these capabilities to enable droplet-surface material interchange of two modes: material deposition (droplet-to-surface) and material recovery (surface-to-droplet). DCI presents a unique strategy for contactless, reversible wetting state modulation that is simple yet powerful for applications such as integrating droplet microfluidics to mass spectrometry.
Collapse
Affiliation(s)
- Paradorn Rummaneethorn
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, 311A Towne Building, 220 South 33(rd) Street, Philadelphia, PA 19104, USA.
| | - Daeyeon Lee
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, 311A Towne Building, 220 South 33(rd) Street, Philadelphia, PA 19104, USA.
| |
Collapse
|
5
|
Wei G, Du L, Zhang H, Xing J, Chen S, Quan X. Electrochemical Opening of Impermeable Nanochannels in Laminar Graphene Membranes for Ultrafast Nanofiltration. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3843-3852. [PMID: 36824031 DOI: 10.1021/acs.est.2c07158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Reduced graphene oxide (rGO) could be theoretically used to construct highly permeable laminar membranes with nearly frictionless nanochannels for water treatment. However, their pristine (sp2 C-C) regions usually restack into impermeable channels as a result of van der Waals interactions, resulting in a much low permeance. In this study, we demonstrate that the restacked regions could be electrochemically expanded to form ultrafast water transport nanochannels by providing a low positive potential (e.g., +1.00 V vs SCE) to the rGO membrane. Experimental investigations indicate that the structural expansion is attributed to the intercalation of water molecules into the restacked regions, driven by hydrogen bond interactions between water molecules and hydroxyl groups that are electrochemically produced on edges of rGO nanosheets. The structural expansion could be promoted by weakening the graphene-OH- interactions through intermittent application of the potential. As a result of more ultrafast water transport nanochannels available, the electrochemically treated rGO membranes could have a permeance 2 orders of magnitude higher than that of the pristine one and ∼3 times higher than that of graphene oxide membranes. Because of their smaller average pore size, the rGO membranes also have a higher ionic/molecular rejection performance than graphene oxide membranes.
Collapse
Affiliation(s)
- Gaoliang Wei
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Lei Du
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Haiguang Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jiajian Xing
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shuo Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
6
|
Wang A, Gao S, Zhu Y, Jin J. Fast and Integral Nano-Surface-Coating of Various Fiber Materials via Interfacial Polymerization. ACS Macro Lett 2023; 12:93-100. [PMID: 36595347 DOI: 10.1021/acsmacrolett.2c00631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Surface coating is essential and critical to endow fiber materials with various functions for broad applications. However, it is still a great challenge to achieve a fast, fully covered, and robust surface coating on multiple fibers. In this work, a nanoscale surface coating with superior stability was rapidly and integrally formed on various fiber materials (such as Nylon mesh, nonwoven fabrics, and stainless-steel mesh) by highly reactive interfacial polymerization (IP) between polyethylenimine (PEI) and trimesoyl chloride (TMC). The resulting polyamide (PA) layer with an ultrathin thickness of tens of nanometers wholly and uniformly covered the surface of each fiber of the constituent material. Due to the synergistic effect of the PA layer with inherent robustness and the fully covered structure between the outer PA layer and the inner fiber, the nanosurface-coating exhibited outstanding mechanical stability, good acid resistance, and excellent organic solvent resistance. The functional modification of the nanosurface-coating can be easily carried out by using the abundant carboxyl groups in the PA layer. By introducing sulfobetaine zwitterionic copolymers via either "grafting from" or "grafting to" methods, the surfaces presented prominent underwater antioil-adhesion property and exceptional protein adhesion resistance. The surface coating based on IP process opens up an avenue in the field of surface modification. It is expected to offer a generally feasible strategy for the fabrication of fiber materials with robust and multifunctional coatings.
Collapse
Affiliation(s)
- Aqiang Wang
- Innovation Center for Chemical Science, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Shoujian Gao
- i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
| | - Yuzhang Zhu
- i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
| | - Jian Jin
- Innovation Center for Chemical Science, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| |
Collapse
|
7
|
Zhang Q, Li K, Li Y, Li Y, Zhang X, Du Y, Tian D. Gradient monolayered porous membrane for liquid manipulation: from fabrication to application. NANOSCALE ADVANCES 2022; 4:3495-3503. [PMID: 36134360 PMCID: PMC9400516 DOI: 10.1039/d2na00421f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 07/21/2022] [Indexed: 06/16/2023]
Abstract
The controlled transport of liquid on a smart material surface has important applications in the fields of microreactors, mass and heat transfer, water collection, microfluidic devices and so on. Porous membranes with special wettability have attracted extensive attention due to their unique unidirectional transport behavior, that is, liquid can easily penetrate in one direction while reverse transport is prevented, which shows great potential in functional textiles, fog collection, oil/water separation, sensors, etc. However, many porous membranes are synthesized from multilayer structural materials with poor mechanical properties and are currently prone to delamination, which limits their stability. While a monolayered porous membrane, especially for gradient structure, is an efficient, stable and durable material owing to its good durability and difficult stratification. Therefore, it is of great significance to fabricate a monolayered porous membrane for controllable liquid manipulation. In this minireview, we briefly introduce the classification and fabrication of typical monolayered porous membranes. And the applications of monolayered porous membranes in unidirectional penetration, selective separation and intelligent response are further emphasized and discussed. Finally, the controllable preparation and potential applications of porous membranes are featured and their prospects discussed on the basis of their current development.
Collapse
Affiliation(s)
- Qiuya Zhang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, School of Chemistry, Beihang University Beijing 100191 P. R. China
- School of Physics, Beihang University Beijing 100191 P. R. China
| | - Ke Li
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, School of Chemistry, Beihang University Beijing 100191 P. R. China
| | - Yuliang Li
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, School of Chemistry, Beihang University Beijing 100191 P. R. China
| | - Yan Li
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, School of Chemistry, Beihang University Beijing 100191 P. R. China
| | - Xiaofang Zhang
- School of Mathematics and Physics, University of Science & Technology Beijing Beijing 100083 P. R. China
| | - Yi Du
- School of Physics, Beihang University Beijing 100191 P. R. China
| | - Dongliang Tian
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, School of Chemistry, Beihang University Beijing 100191 P. R. China
- Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University Beijing 100191 P. R. China
| |
Collapse
|
8
|
Zhang L, Kan X, Huang T, Lao J, Luo K, Gao J, Liu X, Sui K, Jiang L. Electric field modulated water permeation through laminar Ti 3C 2T x MXene membrane. WATER RESEARCH 2022; 219:118598. [PMID: 35597223 DOI: 10.1016/j.watres.2022.118598] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/07/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
Controlling water transport is central to a wide range of water-related energy and environment issues. In particular, enhancing the water permeation is highly demanded for practical membrane applications such as water treatment. In this work, we demonstrate that the water permeation through the laminar and electrically conductive MXene membrane can be facilely modulated with electric field. By applying a negative voltage of a few volts on the membrane, the water permeation rate was enhanced by 70 times. Density functional theory calculations and experimental characterizations suggest that the enhancement arises from the enhanced water/MXene interaction under electric field, which manifests itself as enhanced hydrophilicity of the MXene nanosheets. Along with the facilitated water permeation, the rejection rate to dyes of the membrane was kept at a relatively high level, which was 93.1% to Congo red and 94.8% to aniline blue under an applied voltage of -3 V, showing the potential for dye separation and water purification. Considering that there has been increasing interest in utilizing MXene for separations and water treatment, this work should inspire a range of future works in the related area to improve the membrane performance with external stimuli.
Collapse
Affiliation(s)
- Li Zhang
- College of Materials Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Xiaonan Kan
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Tao Huang
- College of Materials Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Junchao Lao
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Kuiguang Luo
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Jun Gao
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; Shandong Energy Institute, Qingdao 266101, China.
| | - Xueli Liu
- College of Materials Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China.
| | - Kunyan Sui
- College of Materials Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China.
| | - Lei Jiang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| |
Collapse
|
9
|
Liu M, Li C, Peng Z, Chen S, Zhang B. Simple but Efficient Method To Transport Droplets on Arbitrarily Controllable Paths. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:3917-3924. [PMID: 35297634 DOI: 10.1021/acs.langmuir.2c00194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The flexible manipulation of droplets manifests a wide spectrum of applications, such as micro-flow control, drug-targeted therapy, and microelectromechanical system heat dissipation. How to realize the efficient control of droplets has become a problem of concern. In this paper, a simple method that can realize the transport of droplets along any controllable path is proposed. It not only has a simple preparation process and clear transport mechanism but is also easy to realize in manipulation technology. A magnetic-sensitive surface is prepared by filling a polymer matrix with magnetic particles and immersing in a lubricant. Under the action of an external magnetic field, rough microstructures are generated locally on the surface, forming the wettability gradient with the area far away from the field. Moving the magnetic field, the wettability gradient region moves accordingly and drives droplets to transport. To better control the transport path of droplets or realize a more complex path design, a ring-shaped magnetic field is further adopted, during which the droplet is automatically located in the ring-shaped region and moves with the movement of the ring-shaped magnetic field. The present technique is simple and easy to implement, which should be helpful in the field of precise regulation of the droplet position.
Collapse
Affiliation(s)
- Ming Liu
- Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, People's Republic of China
- School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Chenghao Li
- Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Zhilong Peng
- Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Shaohua Chen
- Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Bo Zhang
- Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| |
Collapse
|
10
|
Sun Z, Cao Z, Li Y, Zhang Q, Zhang X, Qian J, Jiang L, Tian D. Switchable smart porous surface for controllable liquid transportation. MATERIALS HORIZONS 2022; 9:780-790. [PMID: 34901984 DOI: 10.1039/d1mh01820e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Controllable liquid transportation through a smart porous membrane is realized by manipulating the surface wetting properties and external stimuli, and has been intensively studied. However, the liquid transportation, e.g., permeation and moving process, at the interface is generally uninterrupted, i.e., the opening and closing of the interface is irreversible. Herein, we present a new strategy to achieve magnetic adaptive switchable surfaces, i.e., liquid-infused micro-nanostructured porous composite film surfaces, for controllable liquid transportation, via modulation of the magnetic field. The liquid transportation process can be interrupted and restarted on the porous composite film because its pore structure can be quickly closed and opened owing to the adaptive morphological transformation of the magnetic liquid with a varying magnetic field. That is, the liquid permeation process occurs due to the open pore structure of the composite film when the external magnetic field is added, while the permeation process can be interrupted owing to the self-repairing closure of the pore when the magnetic field is removed, and the moving process can be achieved. Thus a magnetic field induced switchable porous composite film can serve as a valve to control liquid permeation based transportation, which opens new avenues for artificial liquid gating devices for flow, smart separation, and droplet microfluidics.
Collapse
Affiliation(s)
- Zhenning Sun
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
| | - Zhengyu Cao
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
| | - Yan Li
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
| | - Qiuya Zhang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
| | - Xiaofang Zhang
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Jiangang Qian
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
| | - Lei Jiang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100191, P. R. China
| | - Dongliang Tian
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
| |
Collapse
|
11
|
Sokoloff JB. Effects of electrical image potentials and solvation energy on salt ions near a metallic or dielectric wall. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2021; 44:122. [PMID: 34613538 DOI: 10.1140/epje/s10189-021-00127-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
Electrical image potentials near a metallic or a dielectric wall of higher dielectric constant than that of the solution are attractive, and therefore, could concentrate salt ions near the wall. In fact, ions in room temperature ionic liquids have been observed to precipitate near a metallic surface (but not near a nonmetallic surface). It will be argued that a likely reason for why precipitation of ions in salt water due to electrical image forces has not as yet been observed is that the solvation of the ions is reduced near the wall. This results in an energy barrier. This reduction occurs because of the large decrease near the wall of the dielectric constant of water normal to the wall. The conditions under which ions are able to get past the resulting energy barrier and concentrate at a solid wall, either as a result of a reduction in this barrier due to screening at high ion concentration or as a result of thermal activation over the barrier will be explored.
Collapse
Affiliation(s)
- J B Sokoloff
- Physics Department, Florida Atlantic University, Boca Raton, FL, 33431, USA.
- Physics Department and Center for Interdisciplinary Research in Complex Systems, Northeastern University, Boston, MA, 02115, USA.
| |
Collapse
|
12
|
Electrospinning Janus Nanofibrous Membrane for Unidirectional Liquid Penetration and Its Applications. Chem Res Chin Univ 2021. [DOI: 10.1007/s40242-021-0010-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
13
|
Dai H, Dong Z, Jiang L. Directional liquid dynamics of interfaces with superwettability. SCIENCE ADVANCES 2020; 6:eabb5528. [PMID: 32917681 PMCID: PMC11206479 DOI: 10.1126/sciadv.abb5528] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
Natural creatures use their surface structures to control directional liquid dynamics for survival. Learning from nature, artificial superwetting materials have triggered technological revolutions in many disciplines. To improve controllability, researchers have attempted to use external fields, such as thermal, light, magnetic, and electric fields, to assist or achieve controllable liquid dynamics. Emerging directional liquid transport applications have prosperously advanced in recent years but still present some challenges. This review discusses and summarizes the field of directional liquid dynamics on natural creatures and artificial surfaces with superwettabilities and ventures to propose several potential strategies to construct directional liquid transport systems for fog collection, 3D printing, energy devices, separation, soft machine, and sensor devices, which are useful for driving liquid transport or motility.
Collapse
Affiliation(s)
- Haoyu Dai
- CAS Key Laboratory of Bio-inspired Materials and Interface Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 101407, China
| | - Zhichao Dong
- CAS Key Laboratory of Bio-inspired Materials and Interface Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 101407, China
| | - Lei Jiang
- CAS Key Laboratory of Bio-inspired Materials and Interface Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 101407, China
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing 100191, China
| |
Collapse
|
14
|
Tabassian R, Nguyen VH, Umrao S, Mahato M, Kim J, Porfiri M, Oh I. Graphene Mesh for Self-Sensing Ionic Soft Actuator Inspired from Mechanoreceptors in Human Body. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1901711. [PMID: 31832318 PMCID: PMC6891913 DOI: 10.1002/advs.201901711] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 09/19/2019] [Indexed: 05/24/2023]
Abstract
Here, inspired by mechanoreceptors in the human body, a self-sensing ionic soft actuator is developed that precisely senses the bending motions during actuating utilizing a 3D graphene mesh electrode. The graphene mesh electrode has the permeability of mobile ions inside the ionic exchangeable polymer and shows low electrical resistance of 6.25 Ω Sq-1, maintaining high electrical conductivity in large bending deformations of 180°. In this sensing system, the graphene woven mesh is embedded inside ionic polymer membrane to interact with mobile ions and to trace their movements. The migration of mobile ions inside the membrane induces an electrical signal on the mesh and provides the information regarding ion distribution, which is proven to be highly correlated with the bending deformation of the actuator. Using this integrated self-sensing system, the responses of an ionic actuator to various input stimulations are precisely estimated for both direct current and alternating current inputs. Even though the generated displacement is extremely small around 300 µm at very low driving voltage of 0.1 V, high level accuracy (96%) of estimated deformations could be achieved using the self-sensing actuator system.
Collapse
Affiliation(s)
- Rassoul Tabassian
- Creative Research Initiative Center for Functionally Antagonistic Nano‐EngineeringDepartment of Mechanical EngineeringKorea Advanced Institute of Science and Technology291 Daehak‐ro, Yuseong‐guDaejeon34141Republic of Korea
| | - Van Hiep Nguyen
- Creative Research Initiative Center for Functionally Antagonistic Nano‐EngineeringDepartment of Mechanical EngineeringKorea Advanced Institute of Science and Technology291 Daehak‐ro, Yuseong‐guDaejeon34141Republic of Korea
| | - Sima Umrao
- Creative Research Initiative Center for Functionally Antagonistic Nano‐EngineeringDepartment of Mechanical EngineeringKorea Advanced Institute of Science and Technology291 Daehak‐ro, Yuseong‐guDaejeon34141Republic of Korea
| | - Manmatha Mahato
- Creative Research Initiative Center for Functionally Antagonistic Nano‐EngineeringDepartment of Mechanical EngineeringKorea Advanced Institute of Science and Technology291 Daehak‐ro, Yuseong‐guDaejeon34141Republic of Korea
| | - Jaehwan Kim
- Creative Research Initiative Center for Functionally Antagonistic Nano‐EngineeringDepartment of Mechanical EngineeringKorea Advanced Institute of Science and Technology291 Daehak‐ro, Yuseong‐guDaejeon34141Republic of Korea
| | - Maurizio Porfiri
- Department of Mechanical and Aerospace EngineeringTandon School of EngineeringNew York University6 MetroTech CenterBrooklynNY11201USA
- Department of Biomedical EngineeringTandon School of EngineeringNew York University6 MetroTech CenterBrooklynNY11201USA
| | - Il‐Kwon Oh
- Creative Research Initiative Center for Functionally Antagonistic Nano‐EngineeringDepartment of Mechanical EngineeringKorea Advanced Institute of Science and Technology291 Daehak‐ro, Yuseong‐guDaejeon34141Republic of Korea
| |
Collapse
|
15
|
Gao D, Cao J, Guo Z. Underwater manipulation of oil droplets and bubbles on superhydrophobic surfaces via switchable adhesion. Chem Commun (Camb) 2019; 55:3394-3397. [DOI: 10.1039/c9cc00271e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
UV light-responsive reversible switching of oil droplet and bubble adhesion underwater is realized to manipulate oil droplet or bubble motion and transportation.
Collapse
Affiliation(s)
- Dejun Gao
- State Key Laboratory of Advanced Welding and Joining
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
- State Key Laboratory of Solid Lubrication
| | - Jian Cao
- State Key Laboratory of Advanced Welding and Joining
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Zhiguang Guo
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou
- P. R. China
| |
Collapse
|
16
|
Loche P, Ayaz C, Schlaich A, Bonthuis DJ, Netz RR. Breakdown of Linear Dielectric Theory for the Interaction between Hydrated Ions and Graphene. J Phys Chem Lett 2018; 9:6463-6468. [PMID: 30382706 DOI: 10.1021/acs.jpclett.8b02473] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Many vital processes taking place in electrolytes, such as nanoparticle self-assembly, water purification, and the operation of aqueous supercapacitors, rely on the precise many-body interactions between surfaces and ions in water. Here we study the interaction between a hydrated ion and a charge-neutral graphene layer using atomistic molecular dynamics simulations. For small separations, the ion-graphene repulsion is of nonelectrostatic nature, and for intermediate separations, van der Waals attraction becomes important. Contrary to prevailing theory, we show that nonlinear and tensorial dielectric effects become non-negligible close to surfaces, even for monovalent ions. This breakdown of standard isotropic linear dielectric theory has important consequences for the understanding and modeling of charged objects at surfaces.
Collapse
Affiliation(s)
- Philip Loche
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , 14195 Berlin , Germany
| | - Cihan Ayaz
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , 14195 Berlin , Germany
| | - Alexander Schlaich
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , 14195 Berlin , Germany
- Laboratoire Interdisciplinaire de Physique, CNRS and Université Grenoble Alpes, UMR CNRS 5588 , 38000 Grenoble , France
| | - Douwe Jan Bonthuis
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , 14195 Berlin , Germany
| | - Roland R Netz
- Fachbereich Physik , Freie Universität Berlin , Arnimallee 14 , 14195 Berlin , Germany
| |
Collapse
|
17
|
Li Y, He L, Zhang X, Zhang N, Tian D. External-Field-Induced Gradient Wetting for Controllable Liquid Transport: From Movement on the Surface to Penetration into the Surface. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1703802. [PMID: 29052911 DOI: 10.1002/adma.201703802] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 09/02/2017] [Indexed: 06/07/2023]
Abstract
External-field-responsive liquid transport has received extensive research interest owing to its important applications in microfluidic devices, biological medical, liquid printing, separation, and so forth. To realize different levels of liquid transport on surfaces, the balance of the dynamic competing processes of gradient wetting and dewetting should be controlled to achieve good directionality, confined range, and selectivity of liquid wetting. Here, the recent progress in external-field-induced gradient wetting is summarized for controllable liquid transport from movement on the surface to penetration into the surface, particularly for liquid motion on, patterned wetting into, and permeation through films on superwetting surfaces with external field cooperation (e.g., light, electric fields, magnetic fields, temperature, pH, gas, solvent, and their combinations). The selected topics of external-field-induced liquid transport on the different levels of surfaces include directional liquid motion on the surface based on the wettability gradient under an external field, partial entry of a liquid into the surface to achieve patterned surface wettability for printing, and liquid-selective permeation of the film for separation. The future prospects of external-field-responsive liquid transport are also discussed.
Collapse
Affiliation(s)
- Yan Li
- Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Linlin He
- Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Xiaofang Zhang
- School of Mathematics and Physics, University of Science & Technology Beijing, Beijing, 100083, P. R. China
| | - Na Zhang
- Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Dongliang Tian
- Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| |
Collapse
|