1
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Wong WSY, Kiseleva MS, Naga A. Polarity-Induced Reactive Wetting: Spreading and Retracting Sessile Water Drops. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:13562-13572. [PMID: 38875489 PMCID: PMC11223483 DOI: 10.1021/acs.langmuir.4c01085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 05/19/2024] [Accepted: 05/23/2024] [Indexed: 06/16/2024]
Abstract
Wetting is typically defined by the relative liquid to solid surface tension/energy, which are composed of polar and nonpolar subcontributions. Current studies often assume that they remain invariant, that is, surfaces are wetting-inert. Complex wetting scenarios, such as adaptive or reactive wetting processes, may involve time-dependent variations in interfacial energies. To maximize differences in energetic states, we employ low-energy perfluoroalkyls integrated with high-energy silica-based polar moieties grown on low-energy polydimethylsiloxane. To this end, we tune the hydrophilic-like wettability on these perfluoroalkyl-silica-polydimethylsiloxane surfaces. Drop contact behaviors range from invariantly hydrophobic at ca. 110° to rapidly spreading at ca. 0° within 5 s. Unintuitively, these vapor-grown surfaces transit toward greater hydrophilicity with increasing perfluoroalkyl deposition. Notably, this occurs as sequential silica-and-perfluoroalkyl deposition also leaves behind embedded polar moieties. We highlight how surfaces having such chemical heterogeneity are inherently wetting-reactive. By creating an abrupt wetting transition composed of reactive and inert domains, we introduce spatial dependency. Drops contacting the transition spread before retracting, occurring over the time scale of a few seconds. This phenomenon contradicts current understanding, exhibiting a uniquely (1) decreasing advancing contact angle and (2) increasing receding contact angle. To explain the behavior, we model such time- and space- dependent reactive wetting using first order kinetics. In doing so, we explore how reactive and recovery mechanisms govern the characteristic time scales of spreading and retracting sessile drops.
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Affiliation(s)
- William S. Y. Wong
- Department
of Applied Physics, School of Science, Aalto
University, FI-02150 Espoo, Finland
| | - Mariia S. Kiseleva
- Department
of Applied Physics, School of Science, Aalto
University, FI-02150 Espoo, Finland
| | - Abhinav Naga
- Department
of Physics, Durham University, Durham DH1 3LE, U.K.
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2
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Wang G, Ma F, Zhu L, Zhu P, Tang L, Hu H, Liu L, Li S, Zeng Z, Wang L, Xue Q. Bioinspired Slippery Surfaces for Liquid Manipulation from Tiny Droplet to Bulk Fluid. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2311489. [PMID: 38696759 DOI: 10.1002/adma.202311489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 04/04/2024] [Indexed: 05/04/2024]
Abstract
Slippery surfaces, which originate in nature with special wettability, have attracted considerable attention in both fundamental research and practical applications in a variety of fields due to their unique characteristics of superlow liquid friction and adhesion. Although research on bioinspired slippery surfaces is still in its infancy, it is a rapidly growing and enormously promising field. Herein, a systematic review of recent progress in bioinspired slippery surfaces, beginning with a brief introduction of several typical creatures with slippery property in nature, is presented. Subsequently,this review gives a detailed discussion on the basic concepts of the wetting, friction, and drag from micro- and macro-aspects and focuses on the underlying slippery mechanism. Next, the state-of-the-art developments in three categories of slippery surfaces of air-trapped, liquid-infused, and liquid-like slippery surfaces, including materials, design principles, and preparation methods, are summarized and the emerging applications are highlighted. Finally, the current challenges and future prospects of various slippery surfaces are addressed.
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Affiliation(s)
- Gang Wang
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Fuliang Ma
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Lijing Zhu
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Ping Zhu
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Lei Tang
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Hongyi Hu
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Luqi Liu
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Shuangyang Li
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Zhixiang Zeng
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Liping Wang
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Qunji Xue
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
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3
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Wang W, Deng W, Gu W, Yu X, Zhang Y. Transparent anti-fingerprint glass surfaces: comprehensive insights into theory, design, and prospects. NANOSCALE 2024; 16:2695-2712. [PMID: 38112659 DOI: 10.1039/d3nr04462a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
With the advancement of information technology, touch-operated devices such as smartphones, tablets, and computers have become ubiquitous, reshaping our interaction with technology. Transparent surfaces, pivotal in the display industry, architecture, and household appliances, are prone to contamination from fingerprints, grease, and dust. Such contaminants compromise the cleanliness, aesthetic appeal, hygiene of the glass, and the overall user visual experience. As a result, fingerprint prevention has gained prominence in related research domains. This article delves into the primary characteristics of fingerprints and elucidates the fundamental mechanisms and components behind their formation. We then explore the essential properties, classifications, and theoretical foundations of anti-fingerprint surfaces. The paper concludes with a comprehensive review of recent advancements and challenges in transparent superlyophobic fingerprint-resistant surfaces, projecting future trajectories for transparent fingerprint-resistant glass surfaces.
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Affiliation(s)
- Wei Wang
- NJIT-YSU Joint Research Institute, Nanjing Institute of Technology (NJIT), Nanjing, 211167, China
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
| | - Weilin Deng
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
| | - Wancheng Gu
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
- The 723 Institute of CSSC, Yangzhou, 225101, P.R. China
| | - Xinquan Yu
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
| | - Youfa Zhang
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, P. R. China.
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4
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Yun GT, Kim Y, Ahn H, Kim M, Jang GM, Im SG, Jung WB, Jung HT. Toward Advanced Superomniphobicity: Hierarchical Insights from Serif-T Nanostructures to Microscale Wrinkles. ACS NANO 2024. [PMID: 38315048 DOI: 10.1021/acsnano.3c11182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Developing a superomniphobic surface that exceeds the static and dynamic repellency observed in nature's springtails for various liquids presents a significant challenge in the realm of surface and interface science. However, progress in this field has been particularly limited when dealing with low-surface-tension liquids. This is because dynamic repellency values are typically at least 2 orders of magnitude lower than those observed with water droplets. Our study introduces an innovative hierarchical topography demonstrating exceptional dynamic repellency to low-surface-tension liquids. Inspired by the structural advantages found in springtails, we achieve a static contact angle of >160° and the complete rebound of droplet impact with a Weber number (We) of ∼104 using ethanol. These results surpass all existing benchmarks that have been reported thus far, including those of natural surfaces. The key insight from our research is the vital role of the microscale air pocket size, governed by wrinkle wavelength, in both static and dynamic repellency. Additionally, nanoscale air pockets within serif-T nanostructures prove to be essential for achieving omniphobicity. Our investigations into the wetting dynamics of ethanol droplets further reveal aspects such as the reduction in contact time and the occurrence of a fragmentation phenomenon beyond We ∼ 350, which has not been previously observed.
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Affiliation(s)
- Geun-Tae Yun
- KAIST-UCBerkeley-Vietnam National University Climate Change Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- National Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- National Nanofab Center (NNFC), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Yesol Kim
- KAIST-UCBerkeley-Vietnam National University Climate Change Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- National Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Saudi Aramco-KAIST CO2 Management Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Hyunah Ahn
- KAIST-UCBerkeley-Vietnam National University Climate Change Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- National Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Minki Kim
- KAIST-UCBerkeley-Vietnam National University Climate Change Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- National Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Gyu Min Jang
- Hydrogen and Low-Carbon Energy R&D Lab, Posco Holdings, Pohang 37637, South Korea
| | - Sung Gap Im
- Functional Thin Film Laboratory (FTFL), Department of Chemical and Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Woo-Bin Jung
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Hee-Tae Jung
- KAIST-UCBerkeley-Vietnam National University Climate Change Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- National Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Saudi Aramco-KAIST CO2 Management Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
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5
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Wei J, Liang W, Mao M, Li B, Zhang B, Zhang J. Impalement-Resistant, Mechanically Stable, and Anti-Static Superamphiphobic Coatings Enabled by Solvent Regulation and Their Application in Anti-Icing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1109-1116. [PMID: 38148548 DOI: 10.1021/acs.langmuir.3c03480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Superamphiphobic coatings have good application prospects in many fields but are limited by their low impalement resistance, weak mechanical stability, and easy adhesion of tiny droplets. Here, impalement-resistant, mechanically stable, and antistatic superamphiphobic coatings were fabricated by spraying a mixture of conductive carbon black (CB), silicone-modified polyester adhesive/fluorinated SiO2 microspheres onto Al alloy. The microspheres were obtained by adhesive phase separation and the binding of fluorinated SiO2 to them. The morphology, superamphiphobicity, impalement resistance, and mechanical stability of the coatings could be regulated by using solvents with different boiling points. As a result, the coatings simultaneously exhibited outstanding mechanical stability, impalement resistance, and superamphiphobicity. The addition of conductive CB endowed the coatings with good antistatic and tiny droplet repellent properties. In addition, the coatings exhibited good anti-icing properties due to the steady air layer at the solid-liquid interface and the very small contact area between them. We suppose that the coatings are very promising for practical application in various fields, including anti-icing, due to their outstanding comprehensive properties and simple preparation process.
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Affiliation(s)
- Jinfei Wei
- Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Weidong Liang
- Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China
| | - Mingyuan Mao
- Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Bucheng Li
- Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Binbin Zhang
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, PR China
| | - Junping Zhang
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- Shandong Xinna Superhydrophobic New Materials Co. Ltd., Yantai 265402, P. R. China
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6
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Wei J, Zhang J, Cao X, Huo J, Huang X, Zhang J. Durable superhydrophobic coatings for prevention of rain attenuation of 5G/weather radomes. Nat Commun 2023; 14:2862. [PMID: 37208369 DOI: 10.1038/s41467-023-38678-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 05/09/2023] [Indexed: 05/21/2023] Open
Abstract
Superhydrophobic coatings are expected to solve the rain attenuation issue of 5G radomes. However, it is very challenging to design and construct such superhydrophobic coatings with good impalement resistance, mechanical robustness, and weather resistance, which remains as one of the main bottlenecks hindering their practical applications. Here, we report the design of superhydrophobic coatings with all these merits mentioned above by spray-coating a suspension of adhesive/fluorinated silica core/shell microspheres onto substrates. The core/shell microspheres are formed by phase separation of the adhesive and adhesion between the adhesive and fluorinated silica nanoparticles. The coatings have an approximately isotropic three-tier hierarchical micro-/micro-/nanostructure, a dense but rough surface at the nanoscale, and chemically inert composition with low surface energy. Consequently, the coatings show excellent impalement resistance, mechanical robustness and weather resistance compared with previous studies, and the mechanisms are revealed. Furthermore, we realize large-scale preparation, extension, and practical application of the coatings for efficiently preventing rain attenuation of 5G/weather radomes. By taking these advantages, we believe that the superhydrophobic coatings have great application potential and market prospect. The findings here will boost preparation and real-world applications of superhydrophobic coatings.
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Affiliation(s)
- Jinfei Wei
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China
| | - Jiaojiao Zhang
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China
| | - Xiaojun Cao
- Shandong Xinna Superhydrophobic New Materials Co. Ltd., 265402, Yantai, PR China
| | - Jinhui Huo
- Shandong Xinna Superhydrophobic New Materials Co. Ltd., 265402, Yantai, PR China
| | - Xiaopeng Huang
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China
| | - Junping Zhang
- Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 100049, Beijing, PR China.
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7
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Taplick M, Ruhmlieb C, Kipp T, Mews A. Two-Dimensional Superstructures from the Gas Phase: Directed Assembly of Copper-Sulfide Nanoplatelets. NANO LETTERS 2023; 23:1313-1319. [PMID: 36758116 DOI: 10.1021/acs.nanolett.2c04531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
We report on a novel plasma-assisted approach for the deposition of free-standing two-dimensional superstructures via directed assembly of copper-sulfide nanoplatelets in the gas phase. For this, the copper-organic complex bis-[bis(N,N-diethyldithiocarbamato)-copper(II)] is thermally evaporated and transported into a capacitively coupled rf plasma to form two-dimensional nanoplatelets upon fragmentation. On a substrate, the highly anisotropic platelets are attached in a directed edge-to-edge configuration. We found that a high substrate temperature of 400 °C is necessary for the 2D vertical growth of copper sulfide. Using plasma reinforces the directional assembly and leads to nanowalls which are several micrometers high with the thickness of a single nanoplatelet. The morphology and crystallographic composition of the emerging superstructures were extensively investigated via scanning and transmission electron microscopy as well as electron diffraction. The data reveal the (010) plane to be the preferred axis for the arrangement of the nanoplatelets.
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Affiliation(s)
- Maria Taplick
- University of Hamburg, Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, Germany
| | - Charlotte Ruhmlieb
- University of Hamburg, Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, Germany
| | - Tobias Kipp
- University of Hamburg, Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, Germany
| | - Alf Mews
- University of Hamburg, Institute of Physical Chemistry, Grindelallee 117, 20146 Hamburg, Germany
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8
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John AT, Tricoli A. Flame assisted synthesis of nanostructures for device applications. ADVANCES IN PHYSICS: X 2022. [DOI: 10.1080/23746149.2021.1997153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Alishba T John
- Nanotechnology Research Laboratory, Research School of Chemistry, College of Science, The Australian National University, Canberra, Australia
| | - Antonio Tricoli
- Nanotechnology Research Laboratory, Research School of Chemistry, College of Science, The Australian National University, Canberra, Australia
- Nanotechnology Research Laboratory, School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Camperdown, Australia
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9
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Si W, Guo Z. Enhancing the lifespan and durability of superamphiphobic surfaces for potential industrial applications: A review. Adv Colloid Interface Sci 2022; 310:102797. [DOI: 10.1016/j.cis.2022.102797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/14/2022] [Accepted: 10/14/2022] [Indexed: 11/01/2022]
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10
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Zhi J, Wang S, Zhang J, Duan X, Wang J. Unveiling the Relationship of Surface Roughness on Superliquid-Repelling Properties with Randomly Distributed Rough Surface Structures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:12841-12848. [PMID: 36215102 DOI: 10.1021/acs.langmuir.2c01778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Though superliquid-repelling surfaces are universally important in the fields of fundamental research and industrial production, the understanding and development of these surfaces to impacting liquid droplets remain elusive, especially the changes of wettability states. Surface roughness is required to obtain superliquid-repelling surfaces. However, the effect of surface roughness on the transition of these surfaces' wettability states is uncertain. Herein, we unveiled the relationship of surface roughness on regulating the wettability states of superliquid-repelling surfaces with randomly distributed rough structures through experiment and calculations. The roughness was controlled via regulating the size of surface rough structures, which were formed by a facile coating method. The results indicated that the surface rough structures could impact the value of the polar component (γsp) and then impact the wettability states of superliquid-repelling surfaces. Quantitatively, when the increment of surface roughness was low, the decrement of γsp was low and the wettability state of the superliquid-repelling surface was superhydrophobicity. When the increment of surface roughness was high, the decrement of γsp was high and the wettability state of the superliquid-repelling surface converted to superamphiphobicity. The findings will shed light onto the development of superliquid-repelling surfaces in future studies.
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Affiliation(s)
- Jinghui Zhi
- School of Energy and Power Engineering, National Research Center of Pumps, Jiangsu University, Zhenjiang212013, P.R. China
- Hefei Huasheng Pumps & Valves Co., Ltd., Hefei230000, P.R. China
| | - Shuaijun Wang
- School of Energy and Power Engineering, National Research Center of Pumps, Jiangsu University, Zhenjiang212013, P.R. China
| | - Junhui Zhang
- Hefei Huasheng Pumps & Valves Co., Ltd., Hefei230000, P.R. China
| | - Xiaoguang Duan
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, SA5005, Australia
| | - Junfeng Wang
- School of Energy and Power Engineering, National Research Center of Pumps, Jiangsu University, Zhenjiang212013, P.R. China
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11
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Oh S, Cho J, Lee J, Han J, Kim S, Nam Y. A Scalable Haze-Free Antireflective Hierarchical Surface with Self-Cleaning Capability. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202781. [PMID: 35901503 PMCID: PMC9507353 DOI: 10.1002/advs.202202781] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/01/2022] [Indexed: 06/15/2023]
Abstract
The lotus effect indicates that a superhydrophobic, self-cleaning surface can be obtained by roughening the topography of a hydrophobic surface. However, attaining high transmittance and clarity through a roughened surface remains challenging because of its strong scattering characteristics. Here, a haze-free, antireflective superhydrophobic surface that consists of hierarchically designed nanoparticles is demonstrated. Close-packed, deep-subwavelength-scale colloidal silica nanoparticles and their upper, chain-like fumed silica nanoparticles individually fulfill haze-free broadband antireflection and self-cleaning functions. These double-layered hierarchical surfaces are obtained via a scalable spraying process that permits precise control over the coating morphology to attain the desired optical and wetting properties. They provide a "specular" visible transmittance of >97% when double-side coated and a record-high self-cleaning capability with a near-zero sliding angle. Self-cleaning experiments on photovoltaic devices verify that the developed surfaces can significantly enhance power conversion efficiencies and aid in retaining pristine device performance in a dusty environment.
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Affiliation(s)
- Seungtae Oh
- Carbon Neutral Technology R&D DepartmentKorea Institute of Industrial Technology (KITECH)Cheonan31056Republic of Korea
| | - Jin‐Woo Cho
- Department of Applied PhysicsKyung Hee UniversityYongin17104Republic of Korea
| | - Jihun Lee
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH)Pohang37673Republic of Korea
| | - Jeonghoon Han
- Department of Mechanical EngineeringKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
| | - Sun‐Kyung Kim
- Department of Applied PhysicsKyung Hee UniversityYongin17104Republic of Korea
| | - Youngsuk Nam
- Department of Mechanical EngineeringKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
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12
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Zhou X, Liu J, Liu W, Steffen W, Butt HJ. Fabrication of Stretchable Superamphiphobic Surfaces with Deformation-Induced Rearrangeable Structures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2107901. [PMID: 34989448 DOI: 10.1002/adma.202107901] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Stretchable superamphiphobic surfaces with a high deformation resistance are in demand to achieve liquid-repellent performance in flexible electronics, artificial skin, and textile dressings. However, it is challenging to make mechanically robust superamphiphobic coatings, which maintain their superliquid repellency in a highly stretched state. Here, a stretchable superamphiphobic surface is reported, on which the microstructures can rearrange during stretching to maintain a stable superamphiphobicity even under a high tensile strain. The surface is prepared by spray-coating silicone nanofilaments onto a prestretched substrate (e.g., cis-1,4-polyisoprene) with poly(dimethylsiloxane) (PDMS) layer as a binder. After subsequent fluorination, this surface keeps its superamphiphobicity to both water and n-hexadecane up to the tensile strain of at least 225%. The binding PDMS layer and rearrangeable structures maximize the deformation resistance of the surface during the stretching process. The superamphiphobicity and morphology of the surface are maintained even after 1000 stretch-release cycles. Taking advantage of the mentioned benefits, a liquid manipulation system is designed, which has the potential for fabricating reusable and low-cost platforms for biochemical detection and lab-on-a-chip systems.
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Affiliation(s)
- Xiaoteng Zhou
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Jie Liu
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Wendong Liu
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Werner Steffen
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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13
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Liu H, Zhang L, Huang J, Mao J, Chen Z, Mao Q, Ge M, Lai Y. Smart surfaces with reversibly switchable wettability: Concepts, synthesis and applications. Adv Colloid Interface Sci 2022; 300:102584. [PMID: 34973464 DOI: 10.1016/j.cis.2021.102584] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/30/2021] [Accepted: 12/15/2021] [Indexed: 11/16/2022]
Abstract
As a growing hot research topic, manufacturing smart switchable surfaces has attracted much attention in the past a few years. The state-of-the-art study on reversibly switchable wettability of smart surfaces has been presented in this systematic review. External stimuli are brought about to render the alteration in chemical conformation and surface morphology to drive the wettability switch. Here, starting from the fundamental theories related to the surfaces wetting principles, highlights on different triggers for switchable wettability, such as pH, light, ions, temperature, electric field, gas, mechanical force, and multi-stimuli are discussed. Different applications that have various wettability requirement are targeted, including oil-water separation, droplets manipulation, patterning, liquid transport, and so on. This review aims to provide a deep insight into responsive interfacial science and offer guidance for smart surface engineering. It ends with a summary of current challenges, future opportunities, and potential solutions on smart switch of wettability on superwetting surfaces.
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Affiliation(s)
- Hui Liu
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile & Clothing, Nantong University, Nantong 226019, PR China; National Manufacturing Innovation Center of Advanced Dyeing and Finishing Technology, Taian 271000, PR China
| | - Li Zhang
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile & Clothing, Nantong University, Nantong 226019, PR China; National Manufacturing Innovation Center of Advanced Dyeing and Finishing Technology, Taian 271000, PR China
| | - Jianying Huang
- National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou 350116, PR China
| | - Jiajun Mao
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, PR China
| | - Zhong Chen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore, Singapore
| | - Qinghui Mao
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile & Clothing, Nantong University, Nantong 226019, PR China; National Manufacturing Innovation Center of Advanced Dyeing and Finishing Technology, Taian 271000, PR China.
| | - Mingzheng Ge
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile & Clothing, Nantong University, Nantong 226019, PR China; National Manufacturing Innovation Center of Advanced Dyeing and Finishing Technology, Taian 271000, PR China.
| | - Yuekun Lai
- National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou 350116, PR China.
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14
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Chen F, Wang Y, Tian Y, Zhang D, Song J, Crick CR, Carmalt CJ, Parkin IP, Lu Y. Robust and durable liquid-repellent surfaces. Chem Soc Rev 2022; 51:8476-8583. [DOI: 10.1039/d0cs01033b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This review provides a comprehensive summary of characterization, design, fabrication, and application of robust and durable liquid-repellent surfaces.
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Affiliation(s)
- Faze Chen
- School of Mechanical Engineering, Tianjin University, Tianjin 300350, China
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300350, China
| | - Yaquan Wang
- Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK
| | - Yanling Tian
- School of Engineering, University of Warwick, Coventry CV4 7AL, UK
| | - Dawei Zhang
- School of Mechanical Engineering, Tianjin University, Tianjin 300350, China
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300350, China
| | - Jinlong Song
- School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Colin R. Crick
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK
| | - Claire J. Carmalt
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Ivan P. Parkin
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Yao Lu
- Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK
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15
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Ding W, Dorao CA, Fernandino M. Improving superamphiphobicity by mimicking tree-branch topography. J Colloid Interface Sci 2021; 611:118-128. [PMID: 34933190 DOI: 10.1016/j.jcis.2021.12.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 12/07/2021] [Accepted: 12/08/2021] [Indexed: 11/17/2022]
Abstract
when a droplet impacts on a superhydrophobic structured surface below a certain impact velocity, the droplet can bounce off completely from the surface. However, above such velocity a fraction of the droplet will pin on the surface. Surfaces capable of repelling water droplets are ubiquitous in nature or have been artificially fabricated. However, as the surface tension of the liquid is reduced, the capability of the surface to remain non-wetting gets hindered. Despite progress in previous research, the understanding and development of superamphiphobic surface to impacting low surface tension droplets remains elusive. It is proposed that multi-layer re-entrant like roughness can further enhance the anti-wetting properties also for low surface tension fluids. In this work, we produce patterned conical micro-structures with lateral nano-sized roughness. Furthermore, the droplet impact experiments are conducted on various surfaces with variable surface tensions (27 mN/m - 72 mN/m) by using droplets with different Weber numbers (2-170). We show that conical microstructures with lateral roughness mimicking tree-branches provides a surface topology capable of absorbing the force exerted by the droplet during the impact which prevents the droplet from pinning on the surface at higher impact velocity even for low surface tension droplets. Our study has significance for understanding the liquid interaction mechanism with the surface during the impact process and for the associated surface design considerations.
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Affiliation(s)
- Wenwu Ding
- Department of Energy and Process Engineering. Norwegian University of Science and Technology, Trondheim 7491, Norway
| | - Carlos Alberto Dorao
- Department of Energy and Process Engineering. Norwegian University of Science and Technology, Trondheim 7491, Norway
| | - Maria Fernandino
- Department of Energy and Process Engineering. Norwegian University of Science and Technology, Trondheim 7491, Norway.
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16
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Hegner KI, Wong WSY, Vollmer D. Ultrafast Bubble Bursting by Superamphiphobic Coatings. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2101855. [PMID: 34365676 DOI: 10.1002/adma.202101855] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 05/12/2021] [Indexed: 05/18/2023]
Abstract
Controlling bubble motion or passively bursting bubbles using solid interfaces is advantageous in numerous industrial applications including flotation, catalysis, electrochemical processes, and microfluidics. Current research has explored the formation, dissolution, pinning, and rupturing of bubbles on different surfaces. However, the ability to tune and control the rate of bubble bursting is not yet achieved. Scaling down surface-induced bubble bursting to just a few milliseconds is important for any application. In this work, the hierarchical structure of superamphiphobic surfaces is tuned in order to rapidly rupture contacting bubbles. Surfaces prepared using liquid flame spray show ultrafast bubble bursting (down to 2 ms) and superior durability. The coatings demonstrate excellent mechanical and chemical stability even in the presence of surface-active species. Air from the ruptured bubble is absorbed into the aerophilic Cassie-state. Long-term applicability is demonstrated by preventing the accumulation of air in the plastron via a connection of the plastron to the environment. The times recorded for bubble rupture and complete reorganization of air are reduced by approximately a factor of 3 compared to previously reported values. The concept is utilized to passively control surfactant-rich foam in froth flotation. Material collection efficiency increased by more than 60 times compared to controls.
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Affiliation(s)
- Katharina I Hegner
- Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - William S Y Wong
- Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Doris Vollmer
- Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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17
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Sun L, Guo J, Chen H, Zhang D, Shang L, Zhang B, Zhao Y. Tailoring Materials with Specific Wettability in Biomedical Engineering. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2100126. [PMID: 34369090 PMCID: PMC8498887 DOI: 10.1002/advs.202100126] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 06/22/2021] [Indexed: 05/02/2023]
Abstract
As a fundamental feature of solid surfaces, wettability is playing an increasingly important role in our daily life. Benefitting from the inspiration of biological paradigms and the development in manufacturing technology, numerous wettability materials with elaborately designed surface topology and chemical compositions have been fabricated. Based on these advances, wettability materials have found broad technological implications in various fields ranging from academy, industry, agriculture to biomedical engineering. Among them, the practical applications of wettability materials in biomedical-related fields are receiving remarkable researches during the past decades because of the increasing attention to healthcare. In this review, the research progress of materials with specific wettability is discussed. After briefly introducing the underlying mechanisms, the fabrication strategies of artificial materials with specific wettability are described. The emphasis is put on the application progress of wettability biomaterials in biomedical engineering. The prospects for the future trend of wettability materials are also presented.
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Affiliation(s)
- Lingyu Sun
- Institute of Translational MedicineDepartment of RadiologyThe Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing210002China
- State Key Laboratory of BioelectronicsSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
| | - Jiahui Guo
- State Key Laboratory of BioelectronicsSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
| | - Hanxu Chen
- State Key Laboratory of BioelectronicsSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
| | - Dagan Zhang
- Institute of Translational MedicineDepartment of RadiologyThe Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing210002China
| | - Luoran Shang
- Zhongshan‐Xuhui Hospitalthe Shanghai Key Laboratory of Medical EpigeneticsInstitutes of Biomedical SciencesFudan UniversityShanghai200032China
| | - Bing Zhang
- Institute of Translational MedicineDepartment of RadiologyThe Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing210002China
| | - Yuanjin Zhao
- Institute of Translational MedicineDepartment of RadiologyThe Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing210002China
- State Key Laboratory of BioelectronicsSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
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18
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Lyu P, Zhang X, Jiang X, Shang B, Liu X, Deng Z. One-Step Preparation of Hydrophobic Surfaces Containing Hydrophilic Groups for Efficient Water Harvesting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9630-9636. [PMID: 34333978 DOI: 10.1021/acs.langmuir.1c01756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Multifunctional surfaces that are favorable for both droplet nucleation and removal are critical for water-harvesting applications, but there still remain great challenges. Herein, we proposed a facile strategy to construct hydrophobic surfaces containing moderate hydrophilic groups to achieve both exceptional droplet nucleation and removal. Different from natural desert beetle-inspired water-harvesting materials, these surfaces utilize limited hydrophilic domains to condense fog, and transport of formed tiny droplets relies on a hydrophobic background. The total surface area of the presented hydrophobic fabric contains hydrophilic groups, and the areas for trapping fog have increased. This feature is optimized to enhance the droplet nucleation density, and the surface still has excellent liquid repellency, resulting in maximum water collection efficiency of the prepared surface reaching up to 3.145 g·cm-2·h-1, much higher than the most reported water-harvesting materials. Due to its high efficiency and scalability, we believe that the proposed strategy to construct hydrophobic surfaces containing hydrophilic groups has great practical value.
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Affiliation(s)
- Pei Lyu
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430073, P. R. China
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia
| | - Xiangyi Zhang
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China
| | - Xin Jiang
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China
| | - Bin Shang
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430073, P. R. China
| | - Xin Liu
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, P. R. China
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430073, P. R. China
| | - Ziwei Deng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China
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19
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Selim MS, Fatthallah NA, Higazy SA, Hao Z, Jing Mo P. A comparative study between two novel silicone/graphene-based nanostructured surfaces for maritime antifouling. J Colloid Interface Sci 2021; 606:367-383. [PMID: 34392032 DOI: 10.1016/j.jcis.2021.08.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 08/04/2021] [Accepted: 08/05/2021] [Indexed: 02/07/2023]
Abstract
Two novel superhydrophobic nanocomposite series of polydimethylsiloxane (PDMS) enriched with reduced graphene oxide (RGO) and graphene oxide/boehmite nanorods (GO-γ-AlOOH) nanofillers were synthesized as maritime fouling-release (FR) surfaces. Controlling the nanofillers' structures and distribution in the silicone matrix influenced the self-cleaning and antifouling properties. γ-AlOOH nanorods had a single crystallinity with an average diameter of 10-20 nm and < 200 nm length. A hydrothermal method was used to prepare RGO, while the chemical deposition method was used to synthesis GO-γ-AlOOH nanocomposites for use as fouling-release coating materials. For studying the synergetic effects of graphene-based materials on the surface, mechanical, and FR features, these nanofillers were dispersed in the silicone matrix using the solution casting method. The hydrophobicity and antifouling properties of the surface were studied using water contact angle (WCA), scanning electron, and atomic force microscopes (SEM and AFM). Coatings' roughness, superhydrophobicity, and surface mechanical properties all improved for the homogeneity of the dispersion of the nanocomposite. Laboratory assessments were carried out for 30 days using selected microorganisms to determine the antifouling effects of the coating systems. PDMS/GO-γ-AlOOH nanorod composite had better antibacterial activity than PDMS/RGO nanocomposite against different bacterial strains. This is caused by the high surface area and stabilizing effects of the GO-γ-AlOOH hybrid nanofillers. The PDMS/GO-γ-AlOOH nanorod composite (3 wt%) had the lowest biodegradability percentage (1.6%) and the microbial endurability percentages for gram-positive, gram-negative, and fungi were 86.42%, 97.94%, and 85.97%, respectively. A field trial in natural seawater was conducted to confirm the coatings' FR performance based on the screening process and image analysis for 45 days in a tropical area. The most profound superhydrophobic antifouling nanostructured coating was the homogeneity of the GO-γ-AlOOH (3 wt%) dispersion, which had a WCA of 151° and a rough surface.
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Affiliation(s)
- Mohamed S Selim
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, PR China; Petroleum Application Department, Egyptian Petroleum Research Institute (EPRI), Nasr City 11727, Cairo, Egypt.
| | | | - Shimaa A Higazy
- Petroleum Application Department, Egyptian Petroleum Research Institute (EPRI), Nasr City 11727, Cairo, Egypt
| | - Zhifeng Hao
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Ping Jing Mo
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, PR China
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20
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Liu G, Wong WSY, Kraft M, Ager JW, Vollmer D, Xu R. Wetting-regulated gas-involving (photo)electrocatalysis: biomimetics in energy conversion. Chem Soc Rev 2021; 50:10674-10699. [PMID: 34369513 DOI: 10.1039/d1cs00258a] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
(Photo)electrolysis of water or gases with water to species serving as industrial feedstocks and energy carriers, such as hydrogen, ammonia, ethylene, propanol, etc., has drawn tremendous attention. Moreover, these processes can often be driven by renewable energy under ambient conditions as a sustainable alternative to traditional high-temperature and high-pressure synthesis methods. In addition to the extensive studies on catalyst development, increasing attention has been paid to the regulation of gas transport/diffusion behaviors during gas-involving (photo)electrocatalytic reactions towards the goal of creating industrially viable catalytic systems with high reaction rates, excellent long-term stabilities and near-unity selectivities. Biomimetic surfaces and systems with special wetting capabilities and structural advantages can shed light on the future design of (photo)electrodes and address long-standing challenges. This article is dedicated to bridging the fields of wetting and catalysis by reviewing the cutting-edge design methodologies of both gas-evolving and gas-consuming (photo)electrocatalytic systems. We first introduce the fundamentals of various in-air/underwater wetting states and their corresponding bioinspired structural properties. The relationship amongst the bubble transport behavior, wettability, and porosity/tortuosity is also discussed. Next, the latest implementations of wetting-related design principles for gas-evolving reactions (i.e. the hydrogen evolution reaction and oxygen evolution reaction) and gas-consuming reactions (i.e. the oxygen reduction reaction and CO2 reduction reaction) are summarized. For photoelectrode designs, additional factors are taken into account, such as light absorption and the separation, transport and recombination of photoinduced electrons and holes. The influences of wettability and 3D structuring of (photo)electrodes on the catalytic activity, stability and selectivity are analyzed to reveal the underlying mechanisms. Finally, remaining questions and related future perspectives are outlined.
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Affiliation(s)
- Guanyu Liu
- School of Chemical & Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore. and Cambridge Centre for Advanced Research and Education in Singapore (CARES), CREATE Tower, 1 Create Way, 138602 Singapore
| | - William S Y Wong
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Markus Kraft
- Cambridge Centre for Advanced Research and Education in Singapore (CARES), CREATE Tower, 1 Create Way, 138602 Singapore and Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge CB3 0AS, UK
| | - Joel W Ager
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA and Berkeley Educational Alliance for Research in Singapore (BEARS), CREATE Tower, 1 Create Way, 138602 Singapore
| | - Doris Vollmer
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Rong Xu
- School of Chemical & Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore. and Cambridge Centre for Advanced Research and Education in Singapore (CARES), CREATE Tower, 1 Create Way, 138602 Singapore
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21
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Dewetting transition of water on nanostructured and wettability patterned surfaces: A molecular dynamics study. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116869] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Zhang J, Wei J, Li B, Zhao X, Zhang J. Long-term corrosion protection for magnesium alloy by two-layer self-healing superamphiphobic coatings based on shape memory polymers and attapulgite. J Colloid Interface Sci 2021; 594:836-847. [PMID: 33794405 DOI: 10.1016/j.jcis.2021.03.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/28/2021] [Accepted: 03/01/2021] [Indexed: 01/29/2023]
Abstract
Magnesium (Mg) alloy has wide potential applications due to its unique properties, but is apt to corrosion. Recently, superhydrophobic coatings are receiving great interest for corrosion protection of metals but suffer from short lifespan. Here, we report a strategy for long-term corrosion protection of Mg alloy by designing two-layer self-healing superamphiphobic coatings based on shape memory polymers (SMP) and attapulgite. The superamphiphobic coatings are composed of a bottom SMP coating containing a corrosion inhibitor (1, 2, 3-benzotriazole, BTA) and ceresine wax microparticles and a top superamphiphobic attapulgite coating. The two-layer self-healing coatings have excellent superamphiphobicity and initial anti-corrosion performance. The Mg alloy with the coatings can withstand immersion in 3.5 wt% NaCl solution for 80 days and neutral salt spray with 5 wt% NaCl for 54 days. Furthermore, the coatings show excellent self-healing capability towards various physical damages, such as 10 scratching/self-healing cycles at the same position, hexagonal star scratching and grid scratching. Moreover, the physically damaged coatings exhibit self-healing behavior of the microstructure and superhydrophobicity, driven by the shape memory effect of the bottom SMP layer. Thus, the self-healed coatings can still withstand 60 days of 3.5 wt% NaCl solution immersion and 30 days of 5 wt% NaCl salt spray. This study paves the way for applying super anti-wetting coatings for long-term corrosion protection of metals.
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Affiliation(s)
- Jiaojiao Zhang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China; Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China
| | - Jinfei Wei
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Bucheng Li
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Xia Zhao
- Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China
| | - Junping Zhang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China.
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23
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Li J, Wang W, Mei X, Pan A. Designable Ultratransparent and Superhydrophobic Surface of Embedded Artificial Compound Eye with Extremely Low Adhesion. ACS APPLIED MATERIALS & INTERFACES 2020; 12:53557-53567. [PMID: 33176099 DOI: 10.1021/acsami.0c18881] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Real-world implementation of artificial compound eye (ACE) has been limited by its poor transparency and high requirement for the stable Cassie state. In general, the improvement of surface dewetting performance sacrifices the transparency of ACE. Herein, ACE was obtained by an integrated manufacturing technology that combined photolithography, microprinting, and chemical growth. Through skillful manipulation of the fabrication process, dewetting hairs were fabricated on the top of micropillars and around the microlens. The combination of nanohairs and micropillars resulted in outstanding superhydrophobicity (∼170°), pristine lotus effect with low sliding angle (∼1°), and contact angle hysteresis (∼2°). Moreover, the surface showed almost no adhesion under a preload of 4 mN, exhibiting excellent stable Cassie state and antiadhesion performance. Furthermore, dynamic impact showed that the impacting droplet was quickly detached from the surface (contact time ∼14.1 ms) without sticking for We = 60. The designed transparency resulted in high performance of optical unit (∼99%, bare glass for comparison). Moreover, ACE exhibited better focusing and imaging capability under larger aperture diameter than microlens without nanohairs. We envision that this research presents a significant advancement in imparting superhydrophobicity and transparency to a so-far inapplicable family of optical devices for many practical outdoor applications.
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Affiliation(s)
- Jiang Li
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xian 710054, China
- Shaanxi Key Laboratory of Intelligent Robots, Xi'an Jiaotong University, Xian 710049, China
| | - Wenjun Wang
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xian 710054, China
- Shaanxi Key Laboratory of Intelligent Robots, Xi'an Jiaotong University, Xian 710049, China
| | - Xuesong Mei
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xian 710054, China
- Shaanxi Key Laboratory of Intelligent Robots, Xi'an Jiaotong University, Xian 710049, China
| | - Aifei Pan
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xian 710054, China
- Shaanxi Key Laboratory of Intelligent Robots, Xi'an Jiaotong University, Xian 710049, China
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24
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Wang T, Lv C, Ji L, He X, Wang S. Designing Re-Entrant Geometry: Construction of a Superamphiphobic Surface with Large-Sized Particles. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49155-49164. [PMID: 32915528 DOI: 10.1021/acsami.0c11398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Re-entrant geometries can effectively trap air pockets beneath coating surfaces, prevent the penetration of low surface tension organic liquids, and achieve superamphiphobic performance. However, the creation of re-entrant geometries through particle-based spray coating remains a challenge. In the past decade, various studies have focused on the preparation of superamphiphobic coatings using ultrafine nanoparticles (10-15 nm) using conventional spray-coating methods. In this work, we aim to fabricate a spray-coated superamphiphobic surface using large particles with a hierarchical structure. The study systematically investigated the wetting behaviors of liquids with different topographies obtained using large particles (i.e., smooth, micro, nano, and micro/nanostructures) by different coating methods. The findings suggested that compared with the typical colloid template method, the surface obtained using the spray-coating method showed much greater roughness, which greatly enhanced the oleophobicity of the coating. Furthermore, only hierarchically monodisperse hollow SiO2 spheres (MDH-SiO2) showed excellent superamphiphobicity, which was independent of the hollow sphere size. While maintaining the coating roughness, by applying solid C@SiO2 as a reference sample, the important role of the hollow structure of MDH-SiO2 at the solid-liquid-air interface was confirmed. Nanosphere-surrounded hollow structures were shown to serve as a re-entrant type structure, preventing the imbibition of the liquid, finally leading to a stable Cassie state. This design strategy may provide useful guidelines for the fabrication of large particle-based spray-coated superamphiphobic surfaces.
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Affiliation(s)
- Tao Wang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Chang Lv
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Lvlv Ji
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Xia He
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Sheng Wang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
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25
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Zhu Q, Li B, Li S, Luo G, Zheng B, Zhang J. Durable superamphiphobic coatings with high static and dynamic repellency towards liquids with low surface tension and high viscosity. J Colloid Interface Sci 2020; 578:262-272. [DOI: 10.1016/j.jcis.2020.05.086] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 11/25/2022]
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26
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Bai Z, Zhang B. Fabrication of superhydrophobic reduced-graphene oxide/nickel coating with mechanical durability, self-cleaning and anticorrosion performance. NANO MATERIALS SCIENCE 2020. [DOI: 10.1016/j.nanoms.2019.05.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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27
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Wong WSY, Corrales TP, Naga A, Baumli P, Kaltbeitzel A, Kappl M, Papadopoulos P, Vollmer D, Butt HJ. Microdroplet Contaminants: When and Why Superamphiphobic Surfaces Are Not Self-Cleaning. ACS NANO 2020; 14:3836-3846. [PMID: 32096971 PMCID: PMC7307963 DOI: 10.1021/acsnano.9b08211] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 02/25/2020] [Indexed: 05/19/2023]
Abstract
Superamphiphobic surfaces are commonly associated with superior anticontamination and antifouling properties. Visually, this is justified by their ability to easily shed off drops and contaminants. However, on micropillar arrays, tiny droplets are known to remain on pillars' top faces while the drop advances. This raises the question of whether remnants remain even on nanostructured superamphiphobic surfaces. Are superamphiphobic surfaces really self-cleaning? Here we investigate the presence of microdroplet contaminants on three nanostructured superamphiphobic surfaces. After brief contact with liquids having different volatilities and surface tension (water, ethylene glycol, hexadecane, and an ionic liquid), confocal microscopy reveals a "blanket-like" layer of microdroplets remaining on the surface. It appears that the phenomenon is universal. Notably, when placing subsequent drops onto the contaminated surface, they are still able to roll off. However, adhesion forces can gradually increase by up to 3 times after repeated liquid drop contact. Therefore, we conclude that superamphiphobic surfaces do not warrant self-cleaning and anticontamination capabilities at sub-micrometric length scales.
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Affiliation(s)
- William S. Y. Wong
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Tomas P. Corrales
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
- Department
of Physics, Federico Santa María
Technical University, Avenida España 1680, Casilla 110-V, Valparaíso, Chile
| | - Abhinav Naga
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Philipp Baumli
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Anke Kaltbeitzel
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Michael Kappl
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Periklis Papadopoulos
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
- Department
of Physics, University of Ioannina, GR-45110 Ioannina, Greece
| | - Doris Vollmer
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Hans-Jürgen Butt
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
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28
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Li D, Fan Y, Han G, Guo Z. Superomniphobic Silk Fibroin/Ag Nanowires Membrane for Flexible and Transparent Electronic Sensor. ACS APPLIED MATERIALS & INTERFACES 2020; 12:10039-10049. [PMID: 32017854 DOI: 10.1021/acsami.9b23378] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Superwetting surfaces that repel various liquids have been exciting for biomimetic research and have displayed versatile potential applications. Generally, superhydrophobic coatings can allow for droplet rolling off and antifouling, whereas it is a challenge to achieve superomniphobic surfaces with transparency, flexibility, and conductivity. Here, we adopt an effective and simple method to fabricate a superomniphobic, transparent, and flexible smart silk fibroin (SF) membrane by spray-coating long AgNWs dispersed in polydimethylsiloxane (PDMS), followed by treatment with vacuum drying. The resulting SF/AgNWs membranes are super-repellent to different liquids with low surface tension and water, and demonstrate high contact angles (CAs) more than 150° and low rolling-off angles (RAs) even less than 10°. Moreover, the obtained membranes display superior sensitivity under stretching and bending, as well as intact stability of high transparency, which can be considered as promising flexible sensing electronics to detect human motions under wet conditions.
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Affiliation(s)
- Deke Li
- School of Materials Engineering , Lanzhou Institute of Technology , Lanzhou 730050 , People's Republic of China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Sciences , Lanzhou 730000 , People's Republic of China
| | - Yufeng Fan
- School of Materials Engineering , Lanzhou Institute of Technology , Lanzhou 730050 , People's Republic of China
| | - Guocai Han
- School of Materials Engineering , Lanzhou Institute of Technology , Lanzhou 730050 , People's Republic of China
| | - Zhiguang Guo
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials , Hubei University , Wuhan 430062 , People's Republic of China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics , Chinese Academy of Sciences , Lanzhou 730000 , People's Republic of China
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29
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Cai R, De Smet D, Vanneste M, Nysten B, Glinel K, Jonas AM. One-Step Aqueous Spraying Process for the Fabrication of Omniphobic Fabrics Free of Long Perfluoroalkyl Chains. ACS OMEGA 2019; 4:16660-16666. [PMID: 31616848 PMCID: PMC6788208 DOI: 10.1021/acsomega.9b02583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
We report on a simple and versatile method for the preparation in one-step of omniphobic textiles, using only aqueous suspensions of silica particles and polyurethane devoid of long perfluoroalkyl chains (C8) that are now legally-banned because of severe environmental concerns. The omniphobic coatings can be applied on different substrates including fabrics, can resist acidic and basic conditions and a moderate number of washing cycles, and repel liquids such as n-octane, dodecane, hexadecane, ethylene glycol, glycerol, olive oil, and water. Analysis of the wetting properties of coated fabrics indicates that the liquid repellence results from the trapping of air in the re-entrant roughness created by aggregates of silica particles, together with the low surface tension of the polyurethane which bears legally accepted short perfluoroalkyl chains (C4). Our study is a significant step forward toward achieving more environmentally-friendly and robust omniphobic textiles.
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Affiliation(s)
- Ronggang Cai
- Bio
& Soft Matter, Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1/box L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - David De Smet
- Centexbel, Technologiepark 70, 9052 Zwijnaarde, Belgium
| | | | - Bernard Nysten
- Bio
& Soft Matter, Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1/box L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Karine Glinel
- Bio
& Soft Matter, Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1/box L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Alain M. Jonas
- Bio
& Soft Matter, Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1/box L7.04.02, 1348 Louvain-la-Neuve, Belgium
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30
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Zhang J, Yu B, Wei Q, Li B, Li L, Yang Y. Highly transparent superamphiphobic surfaces by elaborate microstructure regulation. J Colloid Interface Sci 2019; 554:250-259. [DOI: 10.1016/j.jcis.2019.06.106] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/27/2019] [Accepted: 06/28/2019] [Indexed: 02/02/2023]
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31
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Design of robust superhydrophobic coatings using a novel fluorinated polysiloxane with UV/moisture dual cure system. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2019.104329] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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Wang H, Zhang Z, Wang Z, Liang Y, Cui Z, Zhao J, Li X, Ren L. Multistimuli-Responsive Microstructured Superamphiphobic Surfaces with Large-Range, Reversible Switchable Wettability for Oil. ACS APPLIED MATERIALS & INTERFACES 2019; 11:28478-28486. [PMID: 31307191 DOI: 10.1021/acsami.9b07941] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The switchable wettability is essential for widespread applications in droplet manipulation, rewritable liquid patterning, fluid carrying, and so forth. However, it remains difficult to achieve the multistimuli-responsive, large-range, and reversible wetting switching especially for liquids with low surface tensions through surface topographical management. Here, we apply a simple and effective template-free self-assembly strategy to fabricate microstructured superamphiphobic surfaces that can reversibly switch the wetting performance for oil by transforming the surface morphology in response to multiple stimuli of magnetic fields and mechanical strains. Notably, the noticeably different wetting switching of oil triggered by different stimuli is demonstrated. The contact angles of hexadecane droplets on the as-prepared surfaces can be reversibly switched between 150 ± 1° and 38 ± 2° in response to mechanical strains. Furthermore, the underlying mechanism of wetting switching has been further elucidated using mathematical models. Interestingly, these switchable surfaces dramatically demonstrate the ability to transport oil droplets, without requiring lubricating liquid films. This work not only achieves the large-range and reversible wetting switching for oil but also opens new avenues for fabricating tunable superamphiphobic surfaces with transformable mushroom-like microstructures that can be easily extended to microstructure-dependent friction or adhesion control and used in other fields.
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Affiliation(s)
| | | | - Zuankai Wang
- Department of Mechanical Engineering , City University of Hong Kong , Hong Kong 999077 , People's Republic of China
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33
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Surface topographies of biomimetic superamphiphobic materials: design criteria, fabrication and performance. Adv Colloid Interface Sci 2019; 269:87-121. [PMID: 31059923 DOI: 10.1016/j.cis.2019.04.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 03/15/2019] [Accepted: 04/24/2019] [Indexed: 12/26/2022]
Abstract
Superamphiphobicity is a wetting phenomenon that not only water but also oils or organic solvents with low surface tension exhibit large contact angles above 150° along with low contact angle hysteresis on solid surface. It is well known that both chemical constituent and surface roughness have impacts on the wettability of solid surface. Herein, several fundamental wetting states and design criteria for re-entrant structures are introduced first. Then, various chemical modification materials endowing solid substrates low surface energy are summarized subsequently. Furthermore, roughening processes conferring hierarchical or re-entrant topographic structures on surfaces are classified based on different types of topographies abstracted from the natural oil-repellent creatures (mushroom-like structures) as well as bio-inspired superamphiphobic surfaces (i.e., randomly distributed nanostructures, regularly patterned microstructures and other complex hierarchical structures). Significantly, the impalement pressure and formulated rules of various re-entrant profiles are recommended in detail. At the same time, fabrication, outstanding performances such as mechanical durability, chemical stability are also mentioned according to different types of morphologies. Beyond that, current fabrication obstacles and future prospects are proposed simultaneously in the end.
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34
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Wong WSY. Surface Chemistry Enhancements for the Tunable Super-Liquid Repellency of Low-Surface-Tension Liquids. NANO LETTERS 2019; 19:1892-1901. [PMID: 30726096 PMCID: PMC6728126 DOI: 10.1021/acs.nanolett.8b04972] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Super-hydrophobic, super-oleo(amphi)phobic, and super-omniphobic materials are universally important in the fields of science and engineering. Despite rapid advancements, gaps of understanding still exist between each distinctive wetting state. The transition of super-hydrophobicity to super-(oleo-, amphi-, and omni-)phobicity typically requires the use of re-entrant features. Today, re-entrant geometry induced super-(amphi- and omni-)phobicity is well-supported by both experiments and theory. However, owing to geometrical complexities, the concept of re-entrant geometry forms a dogma that limits the industrial progress of these unique states of wettability. Moreover, a key fundamental question remains unanswered: are extreme surface chemistry enhancements able to influence super-liquid repellency? Here, this was rigorously tested via an alternative pathway that does not require explicit designer re-entrant features. Highly controllable and tunable vertical network polymerization and functionalization were used to achieve fluoroalkyl densification on nanoparticles. For the first time, relative fluoro-functionalization densities are quantitatively tuned and correlated to super-liquid repellency performance. Step-wise tunable super-amphiphobic nanoparticle films with a Cassie-Baxter state (contact angle of >150° and sliding angle of <10°) against various liquids is demonstrated. This was tested down to very low surface tension liquids to a minimum of ca. 23.8 mN/m. Such findings could eventually lead to the future development of super-(amphi)omniphobic materials that transcend the sole use of re-entrant geometry.
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35
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Kim H, Han H, Lee S, Woo J, Seo J, Lee T. Nonfluorinated Superomniphobic Surfaces through Shape-Tunable Mushroom-like Polymeric Micropillar Arrays. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5484-5491. [PMID: 30576594 DOI: 10.1021/acsami.8b17181] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Superomniphobic surfaces showing extremely liquid-repellent properties have received a great amount of attention as they can be used in various industrial and biomedical applications. However, so far, the fabrication processes of these materials mostly have involved the coating of perfluorocarbons onto micro- and nanohierarchical structures of these surfaces, which inevitably causes environmental pollution, leading to health concerns. Herein, we developed a facile method to obtain flexible superomniphobic surfaces without perfluorocarbon coatings that have shape-tunable mushroom-like micropillars (MPs). Inspired by the unique structures on the skin of springtails, we fabricated mushroom-like structures with downward facing edges (i.e., a doubly re-entrant structure) on a surface. The flexible MP structures were fabricated using a conventional micromolding technique, and the shapes of the mushroom caps were made highly tunable via the deposition of a thin aluminum (Al) layer. Due to the compressive residual stress of the Al, the mushroom caps were observed to bend toward the polymer upon forming doubly re-entrant-MP structures. The obtained surface was found to repel most low-surface-tension liquids such as oils, alcohols, and even fluorinated solvents. The developed flexible superomniphobic surface showed liquid repellency even upon mechanical stretching and after surface energy modification. We envision that the developed superomniphobic surface with high flexibility and wetting resistance after surface energy modification will be used in a wide range of applications such as self-cleaning clothes and gloves.
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Affiliation(s)
- Hyunchul Kim
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Heetak Han
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Sanggeun Lee
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Janghoon Woo
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Jungmok Seo
- Center for Biomaterials, Biomedical Research Institute , Korea Institute of Science and Technology (KIST) , Seoul 02792 , Republic of Korea
| | - Taeyoon Lee
- School of Electrical and Electronic Engineering , Yonsei University , Seoul 03722 , Republic of Korea
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36
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Gao S, Liu W, Liu Z. Tuning nanostructured surfaces with hybrid wettability areas to enhance condensation. NANOSCALE 2019; 11:459-466. [PMID: 30325374 DOI: 10.1039/c8nr05772a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Vapor condensation is widespread in natural and industrial applications. Rapid and efficient condensation plays an essential role in improving energy efficiency. Despite numerous efforts over the past few decades, the fundamental mechanism of condensation and the microscopic features of condensed droplets are not well understood. Moreover, designing a nanostructured surface with wetting contrast to enhance dropwise condensation remains unclear. Herein, through molecular dynamics simulation, we characterized the condensation processes on various nanopillar surfaces, including the nucleation, growth and coalescence of nanodroplets. During condensation, the droplet size grows linearly with time as V ∝ t, and the coalescence between small droplets can affect the resultant wetting mode of large droplets. The results indicate that the cooperation between spatially ordering nucleation and dropwise growth endows hybrid nanopillar surfaces with better heat and mass transfer performance compared with other homogeneous nanopillar surfaces. Moreover, an interesting dewetting transition occurring on hydrophobic nanopillar surface was observed during droplet growth, the nucleation site and dewetting transition were analyzed based on potential energy field of surface. By varying the geometric parameters of the nanopillar, we found that the condensation rate of the hybrid nanopillar surface increases with the increase of surface solid fraction. The dense nanopillar array can not only restrain the formation of Wenzel mode droplet, but also enhance the condensation rate, which provides a guidance for the design of hybrid nanostructured surfaces.
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Affiliation(s)
- Shan Gao
- School of Energy and Power Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, P. R. China.
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37
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Lee S, Kim W, Yim C, Yong K, Jeon S. Growth of hierarchical gold clusters for use in superomniphobic electrodes. RSC Adv 2019; 9:761-765. [PMID: 35517590 PMCID: PMC9059506 DOI: 10.1039/c8ra08527g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 12/26/2018] [Indexed: 11/21/2022] Open
Abstract
We developed a method to fabricate a superomniphobic gold electrode by synthesizing hierarchical gold clusters on a gold substrate and treating the surface with low surface energy materials. The reduction of gold ions was repeated several times, causing the gold microparticles to grow in random directions and form hierarchical gold clusters. Treatment of the gold structures with perfluorothiol resulted in a superhydrophobic surface that also exhibited superoleophobicity for oils and liquids with surface tensions as low as 25.6 mN. The resulting electrode was not contaminated by hydrophilic and hydrophobic liquids, and by analyzing the current-voltage characteristics of the electrode with a PEDOT:PSS solution droplet, the electrode was found to be waterproof.
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Affiliation(s)
- Sanghee Lee
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) 77 Cheongam-Ro Pohang Gyeongbuk Republic of Korea
| | - Wuseok Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) 77 Cheongam-Ro Pohang Gyeongbuk Republic of Korea
| | - Changyong Yim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) 77 Cheongam-Ro Pohang Gyeongbuk Republic of Korea
| | - Kijung Yong
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) 77 Cheongam-Ro Pohang Gyeongbuk Republic of Korea
| | - Sangmin Jeon
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) 77 Cheongam-Ro Pohang Gyeongbuk Republic of Korea
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38
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Xi M, Yong J, Chen F, Yang Q, Hou X. A femtosecond laser-induced superhygrophobic surface: beyond superhydrophobicity and repelling various complex liquids. RSC Adv 2019; 9:6650-6657. [PMID: 35518486 PMCID: PMC9060948 DOI: 10.1039/c8ra08328b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 01/30/2019] [Indexed: 11/21/2022] Open
Abstract
Surfaces that can strongly repel various complex liquids, not just pure water, are highly desirable and the fabrication of such surfaces still remains a huge challenge because the liquids one wants to repel usually have a complex chemical composition, viscosity, and concentration. Here, a superhygrophobic surface microstructure was created on a polytetrafluoroethylene (PTFE) surface by femtosecond laser treatment. The laser-ablated surface was composed of a micro/nanoscale hierarchical structure and micropores with a certain degree of re-entrant curvature. After femtosecond laser ablation, the sample surface is directly endowed with superhygrophobicity and has great ability to repel various pure and complex liquids, such as water, 10 000 ppm bovine serum albumin, cola, 10 000 ppm glucose, juice, and saline. It is because the combined effect of the ultralow surface energy of the PTFE material, the laser-induced hierarchical rough microstructure, and the partly re-entrant surface curvature of the porous structure allows the complex liquid droplets to be at the robust Cassie state on the laser-induced surface microstructure. Such superhygrophobic surfaces can be potentially applied in cell engineering, medical instruments, food packaging, microfluidics technology, chemical engineering, and so on. A superhygrophobic surface microstructure that can strongly repel various complex liquids is prepared on a PTFE surface by femtosecond laser treatment.![]()
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Affiliation(s)
- Min Xi
- State Key Laboratory for Manufacturing System Engineering
- Shaanxi Key Laboratory of Photonics Technology for Information
- School of Electronics & Information Engineering
- Xi'an Jiaotong University
- Xi'an
| | - Jiale Yong
- State Key Laboratory for Manufacturing System Engineering
- Shaanxi Key Laboratory of Photonics Technology for Information
- School of Electronics & Information Engineering
- Xi'an Jiaotong University
- Xi'an
| | - Feng Chen
- State Key Laboratory for Manufacturing System Engineering
- Shaanxi Key Laboratory of Photonics Technology for Information
- School of Electronics & Information Engineering
- Xi'an Jiaotong University
- Xi'an
| | - Qing Yang
- School of Mechanical Engineering
- Xi'an Jiaotong University
- Xi'an
- PR China
- The International Joint Research Laboratory for Micro/Nano Manufacturing and Measurement Technologies
| | - Xun Hou
- State Key Laboratory for Manufacturing System Engineering
- Shaanxi Key Laboratory of Photonics Technology for Information
- School of Electronics & Information Engineering
- Xi'an Jiaotong University
- Xi'an
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39
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Ai J, Guo Z. Biomimetic polymeric superamphiphobic surfaces: their fabrication and applications. Chem Commun (Camb) 2019; 55:10820-10843. [DOI: 10.1039/c9cc03813b] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this review, we summarize recent developments in polymeric superamphiphobic surfaces, including their design, fabrication, and potential applications.
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Affiliation(s)
- Jixin Ai
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials
- Hubei University
- Wuhan 430062
- People's Republic of China
- State Key Laboratory of Solid Lubrication
| | - Zhiguang Guo
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials
- Hubei University
- Wuhan 430062
- People's Republic of China
- State Key Laboratory of Solid Lubrication
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40
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Pan S, Chen M, Wu L. Fabrication of a flexible transparent superomniphobic polydimethylsiloxane surface with a micropillar array. RSC Adv 2019; 9:26165-26171. [PMID: 35531005 PMCID: PMC9070391 DOI: 10.1039/c9ra04706a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Accepted: 08/16/2019] [Indexed: 11/29/2022] Open
Abstract
Although superomniphobic surfaces have attracted extensive interest owing to many important applications, successful fabrication of such surfaces still remains a critical challenge. Herein, we present a flexible transparent superomniphobic polydimethylsiloxane (PDMS) surface with a micropillar array using Si nanowires as the mould. The as-obtained PDMS not only exhibits excellent liquid-repellent performance with a static contact angle of over 150° and sliding angle of less than 6° against a wide range of liquids, but also maintains the super-repellency even under acid/base corrosion, mechanical damage, and unidirectional stretching. A flexible transparent superomniphobic polydimethylsiloxane (PDMS) surface with a micropillar array has been fabricated using Si nanowires as the mould.![]()
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Affiliation(s)
- Shengyang Pan
- Department of Materials Science
- Advanced Coatings Research Center of Ministry of Education
- Fudan University
- Shanghai 200433
- China
| | - Min Chen
- Department of Materials Science
- Advanced Coatings Research Center of Ministry of Education
- Fudan University
- Shanghai 200433
- China
| | - Limin Wu
- Department of Materials Science
- Advanced Coatings Research Center of Ministry of Education
- Fudan University
- Shanghai 200433
- China
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41
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Dong S, Li Y, Tian N, Li B, Yang Y, Li L, Zhang J. Scalable Preparation of Superamphiphobic Coatings with Ultralow Sliding Angles and High Liquid Impact Resistance. ACS APPLIED MATERIALS & INTERFACES 2018; 10:41878-41882. [PMID: 30475584 DOI: 10.1021/acsami.8b17825] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In spite of great progress, preparation of superamphiphobic coatings with excellent static and dynamic superamphiphobicity remains challenging. Here, we report superamphiphobic coatings with ultralow sliding angles and high liquid impact resistance. The coatings were prepared by spray-coating the polysiloxane/silica stock suspensions, synthesized by hydrolytic condensation of silanes with silica nanoparticles. The superamphiphobicity relies on microstructure of the coatings, controllable by the diameter of silica nanoparticles. The coatings feature excellent static and dynamic superamphiphobicity for various liquids with surface tension as low as 23.8 mN m-1. Furthermore, we achieved large-scale preparation of the coatings, which paved the way for their applications.
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Affiliation(s)
- Shuantao Dong
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , P.R. China
| | - Yabin Li
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , P.R. China
| | - Ning Tian
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , P.R. China
- Center of Materials Science and Optoelectronics Engineering , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Bucheng Li
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , P.R. China
| | - Yanfei Yang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , P.R. China
- Center of Materials Science and Optoelectronics Engineering , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Lingxiao Li
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , P.R. China
| | - Junping Zhang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, and State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , P.R. China
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42
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Shang B, Chen M, Wu L. One-Step Synthesis of Statically Amphiphilic/Dynamically Amphiphobic Fluoride-Free Transparent Coatings. ACS APPLIED MATERIALS & INTERFACES 2018; 10:41824-41830. [PMID: 30426734 DOI: 10.1021/acsami.8b16485] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although amphiphobic materials have attracted tremendous attention recently owing to their many important applications, there remain some critical challenges such as complex or expensive fabrications, poor long-term stability, nontransparency, etc. Herein, we develop a novel kind of amphiphobic materials-statically amphiphilic but dynamically amphiphobic fluoride-free transparent coating-through one-step reaction. The obtained transparent coating can be readily applied to different kinds of substrates including flat surfaces, curved surfaces, or inner walls of some tubes and bottles, and demonstrate excellent repellency against various high/low-surface-tension liquids and outstanding stability against external damages.
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Affiliation(s)
- Bin Shang
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
| | - Min Chen
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
| | - Limin Wu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
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43
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Pan S, Guo R, Björnmalm M, Richardson JJ, Li L, Peng C, Bertleff-Zieschang N, Xu W, Jiang J, Caruso F. Coatings super-repellent to ultralow surface tension liquids. NATURE MATERIALS 2018; 17:1040-1047. [PMID: 30323333 DOI: 10.1038/s41563-018-0178-2] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 08/29/2018] [Indexed: 06/08/2023]
Abstract
High-performance coatings that durably and fully repel liquids are of interest for fundamental research and practical applications. Such coatings should allow for droplet beading, roll off and bouncing, which is difficult to achieve for ultralow surface tension liquids. Here we report a bottom-up approach to prepare super-repellent coatings using a mixture of fluorosilanes and cyanoacrylate. On application to surfaces, the coatings assemble into thin films of locally multi-re-entrant hierarchical structures with very low surface energies. The resulting materials are super-repellent to solvents, acids and bases, polymer solutions and ultralow surface tension liquids, characterized by ultrahigh liquid contact angles (>150°) and negligible roll-off angles (~0°). Furthermore, the coatings are transparent, durable and demonstrate universal liquid bouncing, tailored responsiveness and anti-freezing properties, and are thus a promising alternative to existing synthetic super-repellent coatings.
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Affiliation(s)
- Shuaijun Pan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China.
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia.
| | - Rui Guo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia
| | - Mattias Björnmalm
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia
- Department of Materials, Department of Bioengineering, and the Institute of Biomedical Engineering, Imperial College London, London, UK
| | - Joseph J Richardson
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia
| | - Ling Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China
| | - Chang Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China
- College of Science, Hunan Agricultural University, Changsha, China
| | - Nadja Bertleff-Zieschang
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia
| | - Weijian Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China.
| | - Jianhui Jiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China.
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia.
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44
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Wu Y, Zeng J, Si Y, Chen M, Wu L. Large-Area Preparation of Robust and Transparent Superomniphobic Polymer Films. ACS NANO 2018; 12:10338-10346. [PMID: 30299933 DOI: 10.1021/acsnano.8b05600] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Transparent superamphiphobic surfaces that repel various liquids have many important applications, but there are critical challenges in their fabrication, such as expensive or complicated fabrication methods, contradictions between the rough surface for superamphiphobicity and smooth surface for transparency, large-area fabrication, etc. Herein, we report a simple and effective strategy for large-scale fabrication of robust, transparent, and superomniphobic polymer films by combined unidirectional rubbing and heating-assisted assembly technology. The obtained polymer films display two kinds of special structures of monolayer ordered re-entrant geometries with either hexagonally triangular protrusions or with hexagonally rectangular micropillars, depending upon the sphere diameters of silica templates, and demonstrate excellent repellence to water and low-surface-tension liquids, as well as high transparency.
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Affiliation(s)
- Yi Wu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
| | - Jing Zeng
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
| | - Yinsong Si
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
| | - Min Chen
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
| | - Limin Wu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
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45
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Shang B, Chen M, Wu L. Fabrication of UV-Triggered Liquid-Repellent Coatings with Long-Term Self-Repairing Performance. ACS APPLIED MATERIALS & INTERFACES 2018; 10:31777-31783. [PMID: 30133253 DOI: 10.1021/acsami.8b10838] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The biomimetic fabrication of Nepenthes as a new class of liquid-repellent surface materials has attracted much attention recently, but there still remains big challenges, for example, short-serving life, instability, and so forth. Herein, we develop a novel strategy to fabricate robust slippery liquid-repellent coating by the synthesis and use of silicon oil-contained ultraviolet-responsive microcapsules. Owing to the physical and chemical inertness of silicon oil and the substantial randomly dispersed microcapsules in the coating, this nepenthes-like liquid-repellent coating can not only endure different harsh environments but also have excellent long-term self-healing functions.
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Affiliation(s)
- Bin Shang
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
| | - Min Chen
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
| | - Limin Wu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China , Fudan University , Shanghai 200433 , China
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46
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Nasiri N, Mukherjee S, Panneerselvan A, Nisbet DR, Tricoli A. Optimally Hierarchical Nanostructured Hydroxyapatite Coatings for Superior Prosthesis Biointegration. ACS APPLIED MATERIALS & INTERFACES 2018; 10:24840-24849. [PMID: 29969013 DOI: 10.1021/acsami.8b08029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bone osteogenesis is a complex phenomenon dependent on numerous microenvironmental cues, with their synchrony regulating cellular functions, such as mechanical signaling, survival, proliferation, and differentiation, as well as controlled regional specification of skeletal progenitor cell fate. Therefore, obtaining a mechanistic understanding of cellular response to a microenvironment is now coming into intense focus, which will facilitate the design of programmable biomaterials for regenerative medicine. State-of-the-art nanomaterial synthesis and self-assembly processes yield complex structures that mimic surface properties, composition, and partially the morphology of the extracellular matrix. However, determining key structural properties that control cell attachment has been challenging and contradictory results are reported regarding the mechanisms and roll of nanostructured materials. Here, we significantly improve osteogenesis on bioinert substrates, demonstrating an exemplary organic-inorganic interface for superior prosthesis biointegration. We identify critical microscale hierarchical features that drastically enhance the cellular response to the same nanoscale architecture. It was observed that hierarchical morphologies, with a porosity above 80%, promote early-stage osteoinduction, as indicated by extensive coating ingrowth and nanofilopodia formation. We determined that cellular integration was mediated by two-way recognition of specific nano- and microtopographical cues between the host tissue and cellular microenvironment. This has allowed us to detail a set of determinant features for the nanofabrication of advanced prosthesis coatings that may ultimately improve implant longevity.
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Affiliation(s)
- Noushin Nasiri
- Institute for Biomedical Materials and Devices, Faculty of Science , University of Technology Sydney , Sydney , NSW 2007 , Australia
| | - Shayanti Mukherjee
- The Ritchie Centre , Hudson Institute of Medical Research , Clayton 3168 , Australia
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47
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Fusco Z, Rahmani M, Bo R, Verre R, Motta N, Käll M, Neshev D, Tricoli A. Nanostructured Dielectric Fractals on Resonant Plasmonic Metasurfaces for Selective and Sensitive Optical Sensing of Volatile Compounds. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1800931. [PMID: 29862583 DOI: 10.1002/adma.201800931] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/01/2018] [Indexed: 06/08/2023]
Abstract
Advances in the understanding and fabrication of plasmonic nanostructures have led to a plethora of unprecedented optoelectronic and optochemical applications. Plasmon resonance has found widespread use in efficient optical transducers of refractive index changes in liquids. However, it has proven challenging to translate these achievements to the selective detection of gases, which typically adsorb non-specifically and induce refractive index changes below the detection limit. Here, it's shown that integration of tailored fractals of dielectric TiO2 nanoparticles on a plasmonic metasurface strongly enhances the interaction between the plasmonic field and volatile organic molecules and provides a means for their selective detection. Notably, this superior optical response is due to the enhancement of the interaction between the dielectric fractals and the plasmonic metasurface for thickness of up to 1.8 μm, much higher than the evanescent plasmonic near-field (≈30 nm) . Optimal dielectric-plasmonic structures allow measurements of changes in the refractive index of the gas mixture down to <8 × 10-6 at room temperature and selective identification of three exemplary volatile organic compounds. These findings provide a basis for the development of a novel family of dielectric-plasmonic materials with application extending from light harvesting and photocatalysts to contactless sensors for noninvasive medical diagnostics.
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Affiliation(s)
- Zelio Fusco
- Nanotechnology Research Laboratory, College of Engineering and Computer Science, The Australian National University, ACT, 2601, Australia
| | - Mohsen Rahmani
- Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, ACT, 2601, Australia
| | - Renheng Bo
- Nanotechnology Research Laboratory, College of Engineering and Computer Science, The Australian National University, ACT, 2601, Australia
| | - Ruggero Verre
- Department of Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden
| | - Nunzio Motta
- Institute for Future Environments and School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Mikael Käll
- Department of Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden
| | - Dragomir Neshev
- Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, ACT, 2601, Australia
| | - Antonio Tricoli
- Nanotechnology Research Laboratory, College of Engineering and Computer Science, The Australian National University, ACT, 2601, Australia
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48
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Tian N, Zhang P, Zhang J. Mechanically Robust and Thermally Stable Colorful Superamphiphobic Coatings. Front Chem 2018; 6:144. [PMID: 29761099 PMCID: PMC5936788 DOI: 10.3389/fchem.2018.00144] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 04/12/2018] [Indexed: 11/13/2022] Open
Abstract
Colorful super anti-wetting coatings are receiving growing attention, but are challenging to invent. Here, we report a general method for preparing mechanically robust and thermally stable colorful superamphiphobic coatings. A composite of palygorskite (PAL) nanorods and iron oxide red (IOR) was prepared by solid-state grinding or hydrothermal reaction, which was then modified by hydrolytic condensation of silanes to form a suspension. Superamphiphobic coatings were prepared by spray-coating the suspension onto substrates. The superamphiphobicity depends upon the surface microstructure and chemical composition, which are controllable by the PAL/IOR concentration and the solid-state grinding time. The colorful coatings show excellent superamphiphobicity with high contact angles and low sliding angles for water and various organic liquids of low surface tension, e.g., toluene and n-decane. The coatings also feature high mechanical, chemical and thermal stability, which is superior to all the reported colorful super anti-wetting coatings. Moreover, superamphiphobic coatings of different colors can be prepared via the same procedure using the other metal oxides instead of IOR. We believe the colorful superamphiphobic coatings may find applications in many fields like anti-climbing of oils and restoration of cultural relics, as the coatings are applicable onto various substrates.
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Affiliation(s)
- Ning Tian
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
- College of Material Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Penglin Zhang
- College of Material Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Junping Zhang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
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49
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Wong WSY, Tricoli A. Cassie-Levitated Droplets for Distortion-Free Low-Energy Solid-Liquid Interactions. ACS APPLIED MATERIALS & INTERFACES 2018; 10:13999-14007. [PMID: 29617552 DOI: 10.1021/acsami.8b00641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Despite the rapid advent of superomniphobic materials, there is a lack of methodologies to accurately investigate the ultralow-energy interactions taking place on these interfaces. For instance, universally employed models such as the pendant droplet often fail to provide representative information on the wetting properties of superomniphobic surfaces. The delicate balance between the forces acting at the droplet-surface and droplet-needle interfaces can easily result in heavily distorted droplet profiles. Here, we introduce a Cassie-levitating droplet model which overcomes the limitations of the pendant droplet model, allowing a distortion-free assessment of the interactions between super(amphi)omniphobic materials and low surface tension liquids. Comparative analysis in wetting of low surface tension fluids such as hexadecane (∼27.47 mN/m) on superamphiphobic surfaces via the Cassie-levitating and pendant droplet models reveals up to 70° (800%) deviations in the estimated contact angle hysteresis. A theoretical framework is developed to assess experimentally observed profile distortions against ideal gravity-induced sagging of droplet shapes during dynamic droplet expansion and contraction cycles. Notably, pendant droplets resulted in up to 50% distortion while the Cassie-levitating ones achieved less than just 10%. We believe that the Cassie-levitating droplet model bears ample potential for the characterization of the rapidly emerging family of superomniphobic materials, setting the basis for their future engineering in numerous emerging applications.
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Affiliation(s)
- William S Y Wong
- Nanotechnology Research Laboratory, Research School of Engineering , The Australian National University , Canberra , ACT 2601 , Australia
| | - Antonio Tricoli
- Nanotechnology Research Laboratory, Research School of Engineering , The Australian National University , Canberra , ACT 2601 , Australia
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50
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Teisala H, Geyer F, Haapanen J, Juuti P, Mäkelä JM, Vollmer D, Butt HJ. Ultrafast Processing of Hierarchical Nanotexture for a Transparent Superamphiphobic Coating with Extremely Low Roll-Off Angle and High Impalement Pressure. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706529. [PMID: 29484716 DOI: 10.1002/adma.201706529] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/09/2018] [Indexed: 06/08/2023]
Abstract
Low roll-off angle, high impalement pressure, and mechanical robustness are key requirements for super-liquid-repellent surfaces to realize their potential in applications ranging from gas exchange membranes to protective and self-cleaning materials. Achieving these properties is still a challenge with superamphiphobic surfaces, which can repel both water and low-surface-tension liquids. In addition, fabrication procedures of superamphiphobic surfaces are typically slow and expensive. Here, by making use of liquid flame spray, a silicon dioxide-titanium dioxide nanostructured coating is fabricated at a high velocity up to 0.8 m s-1 . After fluorosilanization, the coating is superamphiphobic with excellent transparency and an extremely low roll-off angle; 10 µL drops of n-hexadecane roll off the surface at inclination angles even below 1°. Falling drops bounce off when impacting from a height of 50 cm, demonstrating the high impalement pressure of the coating. The extraordinary properties are due to a pronounced hierarchical nanotexture of the coating.
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Affiliation(s)
- Hannu Teisala
- Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Florian Geyer
- Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Janne Haapanen
- Laboratory of Physics, Tampere University of Technology, P.O. Box 692, FI-33101, Tampere, Finland
| | - Paxton Juuti
- Laboratory of Physics, Tampere University of Technology, P.O. Box 692, FI-33101, Tampere, Finland
| | - Jyrki M Mäkelä
- Laboratory of Physics, Tampere University of Technology, P.O. Box 692, FI-33101, Tampere, Finland
| | - Doris Vollmer
- Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | - Hans-Jürgen Butt
- Department of Physics at Interfaces, Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
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