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Roman HE, Cesura F, Maryam R, Levchenko I, Alexander K, Riccardi C. The fractal geometry of polymeric materials surfaces: surface area and fractal length scales. SOFT MATTER 2024; 20:3082-3096. [PMID: 38315084 DOI: 10.1039/d3sm01497e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Using three common polymeric materials (polypropylene (PP), polytetrafluoroethylene (PTFE) and polycaprolactone (PCL)), a standard oxygen-plasma treatment and atomic force microscopy (AFM), we performed a scaling analysis of the modified surfaces yielding effective Hurst exponents (H ≃ 0.77 ± 0.02 (PP), ≃0.75 ± 0.02 (PTFE), and ≃0.83 ± 0.02 (PCL)), for the one-dimensional profiles, corresponding to the transversal sections of the surface, by averaging over all possible profiles. The surface fractal dimensions are given by ds = 3 - H, corresponding to ds ≃ 2.23, 2.25, and 2.17, respectively. We present a simple method to obtain the surface area from the AFM images stored in a matrix of 512 × 512 pixels. We show that the considerable increase found in the surface areas of the treated samples w.r.t. to the non-treated ones (43% for PP, 85% for PTFE, and 25% for PCL, with errors of about 2.5% on samples of 2 µm × 2 µm) is consistent with the observed increase in the length scales of the fractal regime to determine H, typically by a factor of about 2, extending from a few to hundreds of nanometres. We stipulate that the intrinsic roughness already present in the original non-treated material surfaces may serve as 'fractal' seeds undergoing significant height fluctuations during plasma treatment, suggesting a pathway for the future development of advanced material interfaces with large surface areas at the nanoscale.
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Affiliation(s)
- H Eduardo Roman
- Dipartimento di Fisica, Università di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, Italy.
| | - Federico Cesura
- Dipartimento Scienza dei Materiali, Università di Milano-Bicocca, R. Cozzi 55, 20125 Milano, Italy.
| | - Rabia Maryam
- Dipartimento di Fisica, Università di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, Italy.
| | - Igor Levchenko
- Plasma Sources and Application Centre, Space Propulsion Centre Singapore, 637616 NIE, Singapore.
| | - Katia Alexander
- Electronics Materials Lab, College of Science and Engineering, James Cook University, QLD 4811 Townsville, Australia
- School of Engineering, The Australian National University, ACT 2601 Canberra, Australia.
| | - Claudia Riccardi
- Dipartimento di Fisica, Università di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, Italy.
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2
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Mohd G, Bhat IM, Kakroo I, Balachandran A, Tabasum R, Majid K, Wani MF, Manna U, Ghodake G, Lone S. Azolla Pinnata: Sustainable Floating Oil Cleaner of Water Bodies. ACS OMEGA 2024; 9:12725-12733. [PMID: 38524463 PMCID: PMC10955581 DOI: 10.1021/acsomega.3c08417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/05/2024] [Accepted: 02/12/2024] [Indexed: 03/26/2024]
Abstract
Various plant-based materials effectively absorb oil contaminants at the water/air interface. These materials showcase unparalleled efficiency in purging oil contaminants, encompassing rivers, lakes, and boundless oceans, positioning them as integral components of environmental restoration endeavors. In addition, they are biodegradable, readily available, and eco-friendly, thus making them a preferable choice over traditional oil cleaning materials. This study explores the phenomenal properties of the floating Azolla fern (Azolla pinnata), focusing on its unique hierarchical leaf surface design at both the microscale and nanoscale levels. These intricate structures endow the fern with exceptional characteristics, including superhydrophobicity, high water adhesion, and remarkable oil or organic solvent absorption capabilities. Azolla's leaf surface exhibits a rare combination of dual wettability, where hydrophilic spots on a superhydrophobic base enable the pinning of water droplets, even when positioned upside-down. This extraordinary property, known as the parahydrophobic state, is rare in floating plants, akin to the renowned Salvinia molesta, setting Azolla apart as a natural wonder. Submerged in water, Azolla leaves excel at absorbing light oils at the air-water interface, demonstrating a notable ability to extract high-density organic solvents. Moreover, Azolla's rapid growth, doubling in the area every 4-5 days, especially in flowing waters, positions it as a sustainable alternative to traditional synthetic oil-cleaning materials with long-term environmental repercussions. This scientific lead could pave the way for more environmentally friendly approaches to mitigate the negative impacts of oil spills and promote a cleaner water ecosystem.
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Affiliation(s)
- Ghulam Mohd
- Department
of Chemistry, National Institute of Technology
(NIT), Jammu
& Kashmir 190006, Srinagar, India
- iDREAM
(Interdisciplinary Division for Renewable Energy & Advanced Materials, Laboratory for Bioinspired Research on Advanced Interface
and Nanomaterials (BRAINS), NIT, Jammu & Kashmir 190006, Srinagar, India
| | - Irfan Majeed Bhat
- Department
of Chemistry, National Institute of Technology
(NIT), Jammu
& Kashmir 190006, Srinagar, India
- iDREAM
(Interdisciplinary Division for Renewable Energy & Advanced Materials, Laboratory for Bioinspired Research on Advanced Interface
and Nanomaterials (BRAINS), NIT, Jammu & Kashmir 190006, Srinagar, India
| | - Insha Kakroo
- Department
of Chemistry, National Institute of Technology
(NIT), Jammu
& Kashmir 190006, Srinagar, India
- iDREAM
(Interdisciplinary Division for Renewable Energy & Advanced Materials, Laboratory for Bioinspired Research on Advanced Interface
and Nanomaterials (BRAINS), NIT, Jammu & Kashmir 190006, Srinagar, India
| | - Akshay Balachandran
- Department
of Chemistry, National Institute of Technology
(NIT), Jammu
& Kashmir 190006, Srinagar, India
- iDREAM
(Interdisciplinary Division for Renewable Energy & Advanced Materials, Laboratory for Bioinspired Research on Advanced Interface
and Nanomaterials (BRAINS), NIT, Jammu & Kashmir 190006, Srinagar, India
| | - Ruheena Tabasum
- Department
of Chemistry, National Institute of Technology
(NIT), Jammu
& Kashmir 190006, Srinagar, India
- iDREAM
(Interdisciplinary Division for Renewable Energy & Advanced Materials, Laboratory for Bioinspired Research on Advanced Interface
and Nanomaterials (BRAINS), NIT, Jammu & Kashmir 190006, Srinagar, India
| | - Kowsar Majid
- Department
of Chemistry, National Institute of Technology
(NIT), Jammu
& Kashmir 190006, Srinagar, India
- iDREAM
(Interdisciplinary Division for Renewable Energy & Advanced Materials, Laboratory for Bioinspired Research on Advanced Interface
and Nanomaterials (BRAINS), NIT, Jammu & Kashmir 190006, Srinagar, India
| | - Mohammad Farooq Wani
- Department
of Mechanical Engineering, NIT Srinagar,
NIT, Jammu & Kashmir 190006, Srinagar, India
| | - Uttam Manna
- Department
of Chemistry, Indian Institute of Technology
(IIT), Kamrup, Guwahati 781039, Assam, India
| | - Gajanan Ghodake
- Department
of Biological Science and Environmental Science, College of Life Science
and Biotechnology, Dongguk University, Seoul, Ilsongdong-gu, Goyang-si 10326, Gyeonggi-do, Republic of Korea
| | - Saifullah Lone
- Department
of Chemistry, National Institute of Technology
(NIT), Jammu
& Kashmir 190006, Srinagar, India
- iDREAM
(Interdisciplinary Division for Renewable Energy & Advanced Materials, Laboratory for Bioinspired Research on Advanced Interface
and Nanomaterials (BRAINS), NIT, Jammu & Kashmir 190006, Srinagar, India
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3
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Liu G, Yang J, Zhang K, Wu H, Yan H, Yan Y, Zheng Y, Zhang Q, Chen D, Zhang L, Zhao Z, Zhang P, Yang G, Chen H. Recent progress on the development of bioinspired surfaces with high aspect ratio microarray structures: From fabrication to applications. J Control Release 2024; 367:441-469. [PMID: 38295991 DOI: 10.1016/j.jconrel.2024.01.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/12/2024] [Accepted: 01/25/2024] [Indexed: 02/05/2024]
Abstract
Surfaces with high aspect ratio microarray structures can implement sophisticated assignment in typical fields including microfluidics, sensor, biomedicine, et al. via regulating their deformation or the material properties. Inspired by natural materials and systems, for example sea cockroaches, water spiders, cacti, lotus leaves, rice leaves, and cedar leaves, many researchers have focused on microneedle functional surface studies. When the surface with high aspect ratio microarray structures is stimulated by the external fields, such as optical, electric, thermal, magnetic, the high aspect ratio microarray structures can undergo hydrophilic and hydrophobic switching or shape change, which may be gifted the surfaces with the ability to perform complex task, including directional liquid/air transport, targeted drug delivery, microfluidic chip sensing. In this review, the fabrication principles of various surfaces with high aspect ratio microarray structures are classified and summarized. Mechanisms of liquid manipulation on hydrophilic/hydrophobic surfaces with high aspect ratio microarray structures are clarified based on Wenzel model, Cassie model, Laplace pressure theories and so on. Then the intelligent control strategies have been demonstrated. The applications in microfluidic, drug delivery, patch sensors have been discussed. Finally, current challenges and new insights of future prospects for dynamic manipulation of liquid/air based on biomimetic surface with high aspect ratio microarray structures are also addressed.
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Affiliation(s)
- Guang Liu
- School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, China
| | - Jiajun Yang
- School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, China
| | - Kaiteng Zhang
- School of Mechanical Engineering and Automation, Beihang University, Beijing, China
| | - Hongting Wu
- Zhongtong Bus Holding Co., Ltd, Liaocheng, Shandong, China
| | - Haipeng Yan
- School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, China
| | - Yu Yan
- School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, China
| | - Yingdong Zheng
- School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, China
| | - Qingxu Zhang
- School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, China
| | - Dengke Chen
- College of Transportation, Ludong University, Yantai, Shandong, China
| | - Liwen Zhang
- School of Mechanical Engineering and Automation, Beihang University, Beijing, China
| | - Zehui Zhao
- School of Mechanical Engineering and Automation, Beihang University, Beijing, China
| | - Pengfei Zhang
- School of Mechanical Engineering and Automation, Beihang University, Beijing, China
| | - Guang Yang
- School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, China.
| | - Huawei Chen
- School of Mechanical Engineering and Automation, Beihang University, Beijing, China.
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Chen W, Liu K, Liao X, Wu J, Chen L, Yang Z, Wang X, Liao Y, Fu G, Yang X, Wang Z, Qu G, Wang L, Zhou Y, Zhang Z, Yang C, Ni S, Zheng J, Tao TH, Zou D. Harmonizing Thickness and Permeability in Bone Tissue Engineering: A Novel Silk Fibroin Membrane Inspired by Spider Silk Dynamics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2310697. [PMID: 38102951 DOI: 10.1002/adma.202310697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 11/22/2023] [Indexed: 12/17/2023]
Abstract
Guided bone regeneration gathers significant interest in the realm of bone tissue engineering; however, the interplay between membrane thickness and permeability continues to pose a challenge that can be addressed by the water-collecting mechanism of spider silk, where water droplets efficiently move from smooth filaments to rough conical nodules. Inspired by the natural design of spider silk, an innovative silk fibroin membrane is developed featuring directional fluid transportation via harmoniously integrating a smooth, dense layer with a rough, loose layer; conical microchannels are engineered in the smooth and compact layer. Consequently, double-layered membranes with cone-shaped microporous passageways (CSMP-DSF membrane) are designed for in situ bone repair. Through extensive in vitro testing, it is noted that the CSMP-DSF membrane guides liquid flow from the compact layer's surface to the loose layer, enabling rapid diffusion. Remarkably, the CSMP-DSF membrane demonstrates superior mechanical properties and resistance to bacterial adhesion. When applied in vivo, the CSMP-DSF membrane achieves results on par with the commercial Bio-Gide collagen membranes. This innovative integration of a cross-thickness wetting gradient structure offers a novel solution, harmonizing the often-conflicting requirements of material transport, mechanical strength, and barrier effectiveness, while also addressing issues related to tissue engineering scaffold perfusion.
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Affiliation(s)
- Wenze Chen
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research of Anhui Province, Hefei, 230032, China
| | - Keyin Liu
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Xiaoyu Liao
- College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research of Anhui Province, Hefei, 230032, China
| | - Jing Wu
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Lu Chen
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Zihan Yang
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Xiping Wang
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yinxiu Liao
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Guiqiang Fu
- College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research of Anhui Province, Hefei, 230032, China
| | - Xiaonian Yang
- College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research of Anhui Province, Hefei, 230032, China
| | - Zishuo Wang
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Guanlin Qu
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Li Wang
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yuqiong Zhou
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - ZhiYuan Zhang
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Chi Yang
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Siyuan Ni
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Jisi Zheng
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Tiger H Tao
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 200031, China
- Institute of Brain-Intelligence Technology, Zhangjiang Laboratory, Shanghai, 200031, China
- Shanghai Research Center for Brain Science and Brain-Inspired Intelligence, Shanghai, 200031, China
| | - Duohong Zou
- National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology Department of Oral Surgery Shanghai Ninth People's Hospital College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research of Anhui Province, Hefei, 230032, China
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Fu Y, Ai S, Guo Z, Liu W. Biomimetic 3D efficient fog harvester by synergistic wettability effect. J Colloid Interface Sci 2023; 649:646-654. [PMID: 37369166 DOI: 10.1016/j.jcis.2023.06.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/12/2023] [Accepted: 06/19/2023] [Indexed: 06/29/2023]
Abstract
By collecting water in the air, it is an important way to solve the problem of water shortage in arid and semi-arid areas. Improving the efficiency of fog harvesting is still a great challenge to be overcome. The use of 3D structure is an excellent strategy, here, a Multiple-biomimetic 3D hydrophilic and superhydrophobic fog harvester with a hump-valley structure was prepared by the combination of thermal processing and spraying. Inspired by biological water collection in nature, a 3D porous sponge surface with hydrophilic valley and superhydrophobic hump was obtained by two-step treatment. This surface structure showed excellent fog harvesting performance, which was 185 % higher than the original sponge. This structure accelerates the capture, transfer and transport of droplets during the fog harvesting process and greatly improves the efficiency of fog harvest. The results show that the chemical gradient and structural gradient actuation we constructed on the melamine sponge surface can effectively improve the fog collection efficiency. A surface with a linear hump-valley mixed wettability pattern is designed, and it is proved that fog collection efficiency can be effectively improved at the droplet capture and transfer stage and transport stage respectively. This study highlights a simple and cheap integrated fog harvester material design.
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Affiliation(s)
- Ye Fu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, People's Republic of China
| | - Shulun Ai
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, People's Republic of China.
| | - Zhiguang Guo
- 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.
| | - Weimin Liu
- 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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Mohd G, Majid K, Lone S. Synergetic Role of Nano-/Microscale Structures of the Trifolium Leaf Surface for Self-Cleaning Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6178-6187. [PMID: 37071560 DOI: 10.1021/acs.langmuir.3c00317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Wetting has an essential pertinence to surface applications. The exemplary water-repelling and self-cleaning surfaces in nature have stimulated considerable scientific exploration, given their practical leverage in cleaning window glasses, painted surfaces, fabrics, and solar cells. Here, we explored the three-tier hierarchical surface structure of the Trifolium leaf with distinguished self-cleaning characteristics. The leaf remains fresh, withstands adverse weather, thrives throughout the year, and self-cleans itself against mud or dust. Self-cleaning features are attributed to a three-tier hierarchical synergetic design. The leaf surface is explicated by an optical microscope, a scanning electron microscope, a three-dimensional profilometer, and a water contact angle measuring device. Hierarchical base roughness (i.e., nano-/microscale) comprises a fascinating arrangement, which imparts a superhydrophobic feature to the surface. As a result, the contaminants present on the leaf surface are washed with rolling water droplets. We noticed that self-cleaning is a function of impacting or rolling droplets, and the rolling mechanism is identified as efficient. The self-cleaning phenomenon is studied for contaminations of variable sizes, shapes, and compositions. The contaminations are supplied in both dry and aqueous mixtures. Furthermore, we examined the self-cleaning effect of the Trifolium leaf surface by atmospheric water harvesting. The captured water drops fuse, roll, descend, and wash away the contaminating particles. The diversity of contaminants investigated makes this study applicable to different environmental conditions. And, along with other parallel technologies, this investigation could be useful for crafting sustainable self-cleaning surfaces for regions with acute water scarcity.
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Affiliation(s)
- Ghulam Mohd
- Department of Chemistry, National Institute of Technology (NIT), Srinagar, J&K 190006, India
- iDREAM (Interdisciplinary Division for Renewable Energy & Advanced Materials), NIT, Srinagar, J&K 190006, India
| | - Kowsar Majid
- Department of Chemistry, National Institute of Technology (NIT), Srinagar, J&K 190006, India
- iDREAM (Interdisciplinary Division for Renewable Energy & Advanced Materials), NIT, Srinagar, J&K 190006, India
| | - Saifullah Lone
- Department of Chemistry, National Institute of Technology (NIT), Srinagar, J&K 190006, India
- iDREAM (Interdisciplinary Division for Renewable Energy & Advanced Materials), NIT, Srinagar, J&K 190006, India
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7
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Matsuo M, Hashishita H, Tanaka S, Nakata S. Sequentially Selective Coalescence of Binary Self-Propelled Droplets upon Collective Motion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2073-2079. [PMID: 36692295 DOI: 10.1021/acs.langmuir.2c03344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Subsequent synthesis and detection using droplets as microreactors have shown promise in the development of novel materials and drugs because microreactors enable small-scale synthesis and detection of covalent/non-covalent intermolecular interactions. Self-organization exhibited by autonomous droplets under non-equilibrium conditions is beneficial for manipulating the sequentiality and selectivity of droplet coalescence because expensive equipment or elaborate techniques are not required with the autonomy of droplets. However, to our knowledge, selective coalescence caused by the collective motion of self-propelled droplets has not been demonstrated in inanimate systems. Here, we report sequentially selective coalescence based on the dynamic collective pattern of self-propelled droplets composed of ethyl salicylate (ES) or butyl salicylate (BS). When ES and BS droplets were placed on an aqueous sodium dodecyl sulfate (SDS) solution, the collective motion of droplets resulted in three stages of selective coalescence on the time development. Initially, coalescence was observed only between different types of self-propelled droplets. Subsequently, the formed droplets selectively coalesced with ES droplets. Finally, mature droplets merged with BS droplets. The sequentially selective coalescence was discussed from the dynamic pattern formation of swarming droplets and the collapse of the SDS monolayer at the o/w interface caused by the difference in Laplace pressure and the interfacial instability at the contact point between droplets. Thus, this study formulates a strategy of sequentially selective coalescence of droplets via the collective motion of non-identical self-propelled droplets, promoting a new type of powerful and efficient automation technology based on an autonomous inanimate manner of spatiotemporal pattern formation under non-equilibrium conditions for the droplet manipulation.
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Affiliation(s)
- Muneyuki Matsuo
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Hiromi Hashishita
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Shinpei Tanaka
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521, Japan
| | - Satoshi Nakata
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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8
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Balachandran A, Parayilkalapurackal H, Rajpoot S, Lone S. Bioinspired Green Fabricating Design of Multidimensional Surfaces for Atmospheric Water Harvesting. ACS APPLIED BIO MATERIALS 2023; 6:44-63. [PMID: 36580351 DOI: 10.1021/acsabm.2c00804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Across the globe, the quest for clean water is escalating for both households as well as agricultural exigencies. With the industrial revolution and swift population growth, the contamination of natural water bodies has impacted the lives of more than two billion people around the world. A spectrum of water-saving solutions has been examined. Nonetheless, most of them are either energy-inefficient or limited to only a particular region. Thus, the pursuit of clean and potable drinking water is an assignment that invites collective discourse from scientists, policymakers, and innovators. In this connection, the presence of moisture in the atmosphere is considered one of the major sources of potential freshwater. Thus, fishing in atmospheric water is a mammoth opportunity. Atmospheric water harvesting (AWH) by some plants and animals in nature (particularly in deserts or arid regions) at low humidity serves as an inspiration for crafting state-of-the-art water harvesting structures and surfaces to buffer the menace of acute water scarcity. Though a lot of research articles and reviews have been reported on bioinspired structures with applications in water and energy harvesting, the area is still open for significant improvisation. This work will address the multidimensional-based AWH ability of natural surfaces or fabricated structures without the involvement of toxic chemicals. Moreover, the review will discuss the availability of clean technologies for emulating fascinating natural surfaces on an industrial scale. In the end, the current challenges and the future scope of bioinspired water harvesters will be discussed for pushing greener technologies to confront climate change.
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Affiliation(s)
- Akshay Balachandran
- Department of Chemistry, National Institute of Technology (NIT), Srinagar 190006, India.,iDREAM (Interdisciplinary Division for Renewable Energy & Advanced Materials), National Institute of Technology (NIT), Srinagar 190006, India
| | - Hariprasad Parayilkalapurackal
- iDREAM (Interdisciplinary Division for Renewable Energy & Advanced Materials), National Institute of Technology (NIT), Srinagar 190006, India.,Department of Physics, National Institute of Technology (NIT), Srinagar 190006, India
| | - Surbhi Rajpoot
- Department of Physics, National Institute of Technology (NIT), Srinagar 190006, India
| | - Saifullah Lone
- Department of Chemistry, National Institute of Technology (NIT), Srinagar 190006, India.,iDREAM (Interdisciplinary Division for Renewable Energy & Advanced Materials), National Institute of Technology (NIT), Srinagar 190006, India
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9
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Leivas FR, Barbosa MC. Atmospheric water harvesting using functionalized carbon nanocones. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2023; 14:1-10. [PMID: 36703909 PMCID: PMC9830493 DOI: 10.3762/bjnano.14.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 12/14/2022] [Indexed: 05/28/2023]
Abstract
In this work, we propose a method to harvest liquid water from water vapor using carbon nanocones. The condensation occurs due to the presence of hydrophilic sites at the nanocone entrance. The functionalization, together with the high mobility of water inside nanostructures, leads to a fast water flow through the nanostructure. We show using molecular dynamics simulations that this device is able to collect water if the surface functionalization is properly selected.
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Affiliation(s)
- Fernanda R Leivas
- Instituto de Física, Universidade Federal do Rio Grande do Sul, CP 15051, 91501-970, Porto Alegre, RS, Brazil
| | - Marcia C Barbosa
- Instituto de Física, Universidade Federal do Rio Grande do Sul, CP 15051, 91501-970, Porto Alegre, RS, Brazil
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Zhang K, Chen H, Ran T, Zhang L, Zhang Y, Chen D, Wang Y, Guo Y, Liu G. High-Efficient Fog Harvest from a Synergistic Effect of Coupling Hierarchical Structures. ACS APPLIED MATERIALS & INTERFACES 2022; 14:33993-34001. [PMID: 35796323 DOI: 10.1021/acsami.2c06803] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Fog harvesting is an important method to solve the water shortage in arid and semi-arid areas by collecting water from air. Improving fog harvesting efficiency is still a big challenge to be overcome. Herein, under the inspiration of natural creatures, a novel harvesting structure that couples a hierarchical microchannel (HMC) needle with the Janus membrane by taking a conical pore as their junction is proposed. Such an HMC-conical pore-Janus membrane system can improve the harvesting efficiency by regulation of liquid behavior in the whole fog harvesting process involving droplet capture from air, high speed transport on the microchannel, and droplet detachment from Janus. The synergistic effects of the hierarchical channel-conical pore-Janus structure are exploited in terms of capture, transport, and detachment capabilities, and their underlying mechanism to enhance fog harvesting efficiency is built. Compared with the traditional harvesting structure, the proposed hierarchical channel-conical-Janus coupling mode was demonstrated to improve fog harvesting efficiency by 90%. Such a coupled system has potential applications in efficient fog harvesting systems, microfluidic devices, and liquid manipulation.
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Affiliation(s)
- Kaiteng Zhang
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Huawei Chen
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Tong Ran
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Liwen Zhang
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Yi Zhang
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Dengke Chen
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Yan Wang
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Yurun Guo
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Guang Liu
- School of Mechanical Engineering and Automation, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
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