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Chen YJ, Fang CY, Huang YW, Hsu TF, Tang NT, Tsai HP, Lee RH, Lin SH, Hsuen HW, Lin KYA, Yang H. White Roman Goose Feather-Inspired Unidirectionally Inclined Conical Structure Arrays for Switchable Anisotropic Self-Cleaning. ACS APPLIED MATERIALS & INTERFACES 2024; 16:36840-36850. [PMID: 38954505 DOI: 10.1021/acsami.4c09082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
White Roman goose (Anser anser domesticus) feathers, comprised of oriented conical barbules, are coated with gland-secreted preening oils to maintain a long-term nonwetting performance for surface swimming. The geese are accustomed to combing their plumages with flat bills in case they are contaminated with oleophilic substances, during which the amphiphilic saliva spread over the barbules greatly impairs their surface hydrophobicities and allows the trapped contaminants to be anisotropically self-cleaned by water flows. Particularly, the superhydrophobic behaviors of the goose feathers are recovered as well. Bioinspired by the switchable anisotropic self-cleaning functionality of white Roman geese, superhydrophobic unidirectionally inclined conical structures are engineered through the integration of a scalable colloidal self-assembly technology and a colloidal lithographic approach. The dependence of directional sliding properties on the shape, inclination angle, and size of conical structures is systematically investigated in this research. Moreover, their switchable anisotropic self-cleaning functionalities are demonstrated by Sudan blue II/water (0.01%) separation performances. The white Roman goose feather-inspired coatings undoubtedly offer a new concept for developing innovative applications that require directional transportation and the collection of liquids.
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Affiliation(s)
- You-Jie Chen
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Cai-Yin Fang
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Yun-Wen Huang
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Ting-Fang Hsu
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Nien-Ting Tang
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Hui-Ping Tsai
- Department of Civil Engineering, National Chung Hsing University, 145 Xingda Road, Taichung 40227, Taiwan
| | - Rong-Ho Lee
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Shin-Hua Lin
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Hsiang-Wen Hsuen
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Kun-Yi Andrew Lin
- Department of Environmental Engineering, National Chung Hsing University, Taichung 40227, Taiwan
- Institute of Analytical and Environmental Sciences, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Hongta Yang
- Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
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Weigel N, Li Y, Fery A, Thiele J. From microfluidics to hierarchical hydrogel materials. Curr Opin Colloid Interface Sci 2022. [DOI: 10.1016/j.cocis.2022.101673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Electrical Excitation Decay Time in Chains of Nanoscale Non-Point Dipoles. NANOMATERIALS 2020; 11:nano11010074. [PMID: 33396296 PMCID: PMC7823875 DOI: 10.3390/nano11010074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 12/26/2020] [Accepted: 12/27/2020] [Indexed: 11/17/2022]
Abstract
On the basis of a previously developed model of disperse systems containing non-point dipole particles self-assembled into chains inside a liquid substrate, the decay time of electrical excitations induced in dipoles by an external field is investigated. It was shown that when the external field is completely turned off (from 10-6 V / m to 106 V / m levels) at biologically significant low frequencies (for example, 13 Hz), the decay time of the excitations of nanoscale dipoles nonlinearly depends on the chain length. It was found that the decay time of excitations increases sharply (by four to five orders of magnitude), with an increase in the chain length more than 19-20 dipoles.
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Samantaray K, Mishra SR, Purohit G, Mohanty PS. AC Electric Field Mediated Assembly of Bacterial Tetrads. ACS OMEGA 2020; 5:5881-5887. [PMID: 32226868 PMCID: PMC7098059 DOI: 10.1021/acsomega.9b04124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/25/2020] [Indexed: 05/10/2023]
Abstract
Understanding spatiotemporal organization in bacteria under an external AC electric field is not only very interesting from a perspective of studying assembly and disassembly in a model biofilm but also provides insight into the intricate role of anisotropic interaction with bacterial dynamics that can generate interesting complex structures. In the current study, using confocal microscopy, we demonstrate such complex assemblies of monodisperse tetrad clusters of Micrococcus luteus, an environmental bacterium synthesized under a controlled growth condition. These clusters under the AC field produce a range of interesting structures such as chains, double helix, and bundles, which are instantaneously reversible when the field is switched off. Our studies can provide important insights into the natural organization of the clustered bacterium (with relevance in biofilm-like states) and generate strategies for biomaterial fabrication with a switchable functionality.
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Affiliation(s)
- Kunal Samantaray
- School of Biotechnology and School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar 751024, India
| | - Samir R Mishra
- School of Biotechnology and School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar 751024, India
| | - Gopal Purohit
- School of Biotechnology and School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar 751024, India
| | - Priti S Mohanty
- School of Biotechnology and School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar 751024, India
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Nöjd S, Hirst C, Obiols-Rabasa M, Schmitt J, Radulescu A, Mohanty PS, Schurtenberger P. Soft particles in an electric field - a zero average contrast study. SOFT MATTER 2019; 15:6369-6374. [PMID: 31304503 DOI: 10.1039/c9sm01208g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report on the structural properties of ionic microgel particles subjected to alternating electric fields, using small-angle neutron scattering. The experiments were performed under so-called zero average contrast conditions, which cancel the structure factor contribution to the scattered intensity, allowing us to obtain direct information on the single particle size and structure as particles align in field-induced strings. Our results reveal only a marginal compression of the particles as they align in strings, and indicate considerable particle overlap at higher field strengths. These findings provide further insight into the origins of the previously reported unusual path dependent field-induced crystal-crystal transition found for these systems (P. S. Mohanty et al., Phys. Rev. X, 2015, 5, 011030).
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Affiliation(s)
- Sofi Nöjd
- Division of Physical Chemistry, Department of Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Christopher Hirst
- Division of Physical Chemistry, Department of Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Marc Obiols-Rabasa
- Division of Physical Chemistry, Department of Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Julien Schmitt
- Division of Physical Chemistry, Department of Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Aurel Radulescu
- Jülich Centre for Neutron Science, Heinz Maier-Leibnitz Zentrum, Garching, Germany
| | - Priti S Mohanty
- Division of Physical Chemistry, Department of Chemistry, Lund University, SE-22100 Lund, Sweden and School of Chemical Technology, Kaligan Institute of Industrial Technology (KIIT), Bhubaneswar, India
| | - Peter Schurtenberger
- Division of Physical Chemistry, Department of Chemistry, Lund University, SE-22100 Lund, Sweden and Lund Institute of advanced Neutron and X-ray Science (LINXS), Lund University, Lund, Sweden.
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