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Badenhorst R, Makaev S, Yaremchuk D, Sajjan Y, Sulimov A, Reukov VV, Lavrik NV, Ilnytskyi J, Minko S. Reversible Binding Interfaces Made of Microstructured Polymer Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:7008-7020. [PMID: 38525827 PMCID: PMC10993409 DOI: 10.1021/acs.langmuir.4c00062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/26/2024]
Abstract
The polymer brush architecture of the end-tethered polymer molecules is one of the most widely used efficient methods to regulate interfacial interactions in colloidal systems found in live matter and manufactured materials. Emerging applications of polymer brush structures require solutions to new tasks in the control of interfacial interactions. The rapid development of live cell manufacturing relies on scalable and efficient cell harvesting methods. Stimuli-responsive surfaces made of surface-grafted poly(N-isopropylacrylamide) (PNIPAM) can bind and detach the adherent cell upon changes in temperature and have been used for cell growth and harvesting. The applications are limited by the requirement to satisfy a range of PNIPAM coating characteristics that depend on the dimensions of the integrin complex in the cell membrane and the basal surface. The analysis of the microstructured surfaces, when adhesive and disjoining functions of the microdomains are decoupled, shows that many limitations of PNIPAM one-component coatings can be avoided by using a much broader range of structural characteristics of the microstructured interfaces composed of alternating disjoining PNIPAM domains and adhesive polymeric domains with cell-affinity functional groups. Temperature-controlled reversible adhesion to such microstructured interfaces is studied here experimentally with model systems of solid spherical particles and by employing simulations for solid and soft membranes interacting with the microstructured surfaces to mimic interactions with soft and solid disk-like particles.
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Affiliation(s)
- Ronaldo Badenhorst
- Nanostructured
Material Lab, University of Georgia, Athens, Georgia 30602, United States
| | - Sergei Makaev
- Nanostructured
Material Lab, University of Georgia, Athens, Georgia 30602, United States
| | - Dmytro Yaremchuk
- Institute
for Condensed Matter Physics of the National Academy of
Sciences of Ukraine, Lviv, 790011, Ukraine
| | - Yash Sajjan
- Nanostructured
Material Lab, University of Georgia, Athens, Georgia 30602, United States
| | - Artem Sulimov
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Vladimir V. Reukov
- Department
of Textiles, Merchandising, and Interiors, University of Georgia, Athens, Georgia 30602, United States
| | - Nickolay V. Lavrik
- Center
for Nanophase Materials Sciences, Oak Ridge
National Lab, Oak Ridge, Tennessee 37831, United States
| | - Jaroslav Ilnytskyi
- Institute
for Condensed Matter Physics of the National Academy of
Sciences of Ukraine, Lviv, 790011, Ukraine
- Institute
of Applied Mathematics and Fundamental Sciences, Lviv Polytechnic National University, Lviv, UA-79013, Ukraine
| | - Sergiy Minko
- Nanostructured
Material Lab, University of Georgia, Athens, Georgia 30602, United States
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Kim D, Lee J, Kim G, Ma J, Kim HM, Han JH, Jeong HH. Proton-Assisted Assembly of Colloidal Nanoparticles into Wafer-Scale Monolayers in Seconds. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2313299. [PMID: 38267396 DOI: 10.1002/adma.202313299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/21/2024] [Indexed: 01/26/2024]
Abstract
Underwater adhesion processes in nature promise controllable assembly of functional nanoparticles for industrial mass production; However, their artificial strategies have faced challenges to uniformly transfer nanoparticles into a monolayer, particularly those below 100 nm in size, over large areas. Here a scalable "one-shot" self-limiting nanoparticle transfer technique is presented, enabling the efficient transport of nanoparticles from water in microscopic volumes to an entire 2-inch wafer in a remarkably short time of 10 seconds to reach near-maximal surface coverage (≈40%) in a 2D mono-layered fashion. Employing proton engineering in electrostatic assembly accelerates the diffusion of nanoparticles (over 50 µm2/s), resulting in a hundredfold faster coating speed than the previously reported results in the literature. This charge-sensitive process further enables "pick-and-place" nanoparticle patterning at the wafer scale, with large flexibility in surface materials, including flexible metal oxides and 3D-printed polymers. As a result, the fabrication of wafer-scale disordered plasmonic metasurfaces in seconds is successfully demonstrated. These metasurfaces exhibit consistent resonating colors across diverse material and geometrical platforms, showcasing their potential for applications in full-color painting and optical encryption devices.
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Affiliation(s)
- Doeun Kim
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - JuHyeong Lee
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Gyurin Kim
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Jiyeong Ma
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Hyun Min Kim
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Jang-Hwan Han
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Hyeon-Ho Jeong
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
- Department of Semiconductor Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
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Lai CJ, Tsai HP, Chen JY, Wu MX, Chen YJ, Lin KY, Yang HT. Single-Step Fabrication of Longtail Glasswing Butterfly-Inspired Omnidirectional Antireflective Structures. NANOMATERIALS 2022; 12:nano12111856. [PMID: 35683712 PMCID: PMC9182152 DOI: 10.3390/nano12111856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/19/2022] [Accepted: 05/27/2022] [Indexed: 02/04/2023]
Abstract
Most bio-inspired antireflective nanostructures are extremely vulnerable and suffer from complicated lithography-based fabrication procedures. To address the issues, we report a scalable and simple non-lithography-based approach to engineer robust antireflective structures, inspired by the longtail glasswing butterfly, in a single step. The resulting two-dimensional randomly arranged 80/130/180 nm silica colloids, partially embedded in a polymeric matrix, generate a gradual refractive index transition at the air/substrate interface to suppress light reflection. Importantly, the randomly arranged subwavelength silica colloids display even better antireflection performance for large incident angles than that of two-dimensional non-close-packed silica colloidal crystals. The biomimetic coating is of considerable technological importance in numerous practical applications.
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Affiliation(s)
- Chung-Jui Lai
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (C.-J.L.); (J.-Y.C.); (M.-X.W.); (Y.-J.C.)
| | - Hui-Ping Tsai
- Department of Civil Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan;
| | - Ju-Yu Chen
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (C.-J.L.); (J.-Y.C.); (M.-X.W.); (Y.-J.C.)
| | - Mei-Xuan Wu
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (C.-J.L.); (J.-Y.C.); (M.-X.W.); (Y.-J.C.)
| | - You-Jie Chen
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (C.-J.L.); (J.-Y.C.); (M.-X.W.); (Y.-J.C.)
| | - Kun-Yi Lin
- Department of Environmental Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan
- Correspondence: (K.-Y.L.); (H.-T.Y.)
| | - Hong-Ta Yang
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (C.-J.L.); (J.-Y.C.); (M.-X.W.); (Y.-J.C.)
- Correspondence: (K.-Y.L.); (H.-T.Y.)
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Fabrication of single-layer antireflective coating with environmental stability by modified SiO2 mixed sol. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nundy S, Ghosh A, Tahir A, Mallick TK. Role of Hafnium Doping on Wetting Transition Tuning the Wettability Properties of ZnO and Doped Thin Films: Self-Cleaning Coating for Solar Application. ACS APPLIED MATERIALS & INTERFACES 2021; 13:25540-25552. [PMID: 34024103 DOI: 10.1021/acsami.1c04973] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Herein, we successfully synthesized high-quality Hf-ZnO thin films with various Hf contents (0, 3, 6, 9, 12, and 15 at. %), which showed both superhydrophilic (6% Hf-ZnO) and ultrahydrophobic (15% Hf-ZnO) wetting behavior. Different characterization methods were opted to recognize the structural (XRD, SEM, AFM) and defect properties (XPS) of the pristine and doped materials, to understand the mechanisms underlying the tuning of wetting behavior (contact angle). Hafnium doping plays a noteworthy role in tuning the morphology of the ZnO nanostructures, roughness of the material surface, generation of defects, Lewis acid-base interactions, and wettability properties. We achieved a superhydrophilic surface with 6% Hf-ZnO owing to a smooth surface, less basicity, and maximum concentration of oxygen vacancies, and also an ultrahydrophobic surface with 15% Hf-ZnO because of the rough surface, high basicity, and minimum concentration of oxygen vacancies. The as prepared Hf-ZnO samples showed stable performance (stability, wearability, weatherability, and antifouling) under real-life conditions marking them multifunctional and biosafe material to be effectively used in solar and building's window. A wetting mechanism was established to relate the wetting behavior of the samples to oxygen vacancies (active sites for water dissociation: resulted due to charge mismatch of host cation (Zn2+) by the doped cation (Hf4+)), roughness (smooth surface (Wenzel) with minimum Rrms (0.588) portraying hydrophilic property and rough caltropic surface (Cassie-Baxter) with maximum Rrms (2.522) portraying hydrophobic property), basicity (H2O: Lewis Base; ZnO: Lewis acid; HfO2: Lewis base) and morphology (tube-like structure (0-6% Hf-ZnO) and caltrop-like structure (12-15% Hf-ZnO)).
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Affiliation(s)
- Srijita Nundy
- Environmental and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, U.K
| | - Aritra Ghosh
- Environmental and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, U.K
| | - Asif Tahir
- Environmental and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, U.K
| | - Tapas K Mallick
- Environmental and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, U.K
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