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Long J, Liu S, Li N, Yuan G, Liu Y, Huang Q, Li J, Zhang H, Wang M. Smart Surfaces with pH-Responsiveness Enhanced by Multiscale Hierarchical Structures Fabricated by Laser Direct Writing. ACS APPLIED MATERIALS & INTERFACES 2023; 15:56490-56499. [PMID: 37976307 DOI: 10.1021/acsami.3c13079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
In contemporary applications, smart surfaces capable of altering their properties in response to external stimuli have garnered significant attention. Nonetheless, the efficient creation of smart surfaces exhibiting robust and rapid responsiveness and meticulous controllability on a large scale remains a challenge. This paper introduces an innovative approach to fabricate smart surfaces with strong pH-responsiveness, combining femtosecond laser direct writing (LDW) processing technology with stimulus-responsive polymer grafting. The proposed model involves the grafting of poly(2-diethylaminoethyl methacrylate) (PDEAEMA) onto rough and patterned Au/polystyrene (PS) bilayer surfaces through Au-SH bonding. The incorporation of LDW processing technology extends the choice of microstructures and roughness achievable on material surfaces, while PDEAEMA imparts pH responsiveness. Our findings revealed that the difference in contact angle between acidic and basic droplets on the rough PDEAEMA-g-Au surface (∼118°) greatly surpasses that on the flat PDEAEMA-g-Au surface (∼72°). Next, by leveraging the precision control over surface microstructures enabled by the LDW processing technique, this difference was further augmented to ∼127° on the optimized patterned PDEAEMA-g-Au surface. Further, we created two distinct combined smart surfaces with varying wettability profiles on which the hydrophilic-hydrophobic boundaries exhibit reliable asymmetric wettability for acidic and basic droplets. Additionally, we prepared a separator, realizing a better visual distinction between acid and base and collecting them separately. Given the effective abilities found in this study, we postulate that our smart surfaces hold substantial potential across diverse applications, encompassing microfluidic devices, intelligent sensors, and biomedicine.
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Affiliation(s)
- Jiazhao Long
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Shengkai Liu
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Nana Li
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Guangli Yuan
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Yiting Liu
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Qingyi Huang
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Jiyu Li
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
| | - Haoran Zhang
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, People's Republic of China
| | - Meng Wang
- Shenzhen Technology University, Shenzhen 518118, People's Republic of China
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Shchedrina NN, Kudryashov SI, Moskvin MK, Odintsova GV, Krylach IV, Danilov PA, Bondarenko AG, Davydova EA, Fokina MI, Olekhnovich RO, Uspenskaya MV, Veiko VP. Elementary autonomous surface microfluidic devices based on laser-fabricated wetting gradient microtextures that drive directional water flows. OPTICS EXPRESS 2021; 29:12616-12624. [PMID: 33985015 DOI: 10.1364/oe.418173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 04/01/2021] [Indexed: 06/12/2023]
Abstract
Topography-dependent tuning of water wettability was achieved on a stainless steel surface textured by nanosecond-laser pulses at different laser fluences, with the minimal contribution of the surface chemical modification. Such differently-wet neighboring surface spots were demonstrated to drive an autonomous directional water flow. A series of elementary microfluidic devices based on the spatial wetting gradients were designed and tested as building blocks of "green", energy-saving autonomous microfluidic circuits.
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Mateescu M, Knopf S, Mermet F, Lavalle P, Vonna L. Role of Trapped Air in the Attachment of Staphylococcus aureus on Superhydrophobic Silicone Elastomer Surfaces Textured by a Femtosecond Laser. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1103-1112. [PMID: 31887046 DOI: 10.1021/acs.langmuir.9b03170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Surface texturing is an easy way to control wettability as well as bacterial adhesion. Air trapped in the surface texture of an immersed sample was often proposed as the origin of the low adhesion of bacteria to surfaces showing superhydrophobic properties. In this work, we identified two sets of femtosecond laser processing parameters that led to extreme superhydrophobic textures on a silicone elastomer but showed opposite behavior against Staphylococcus aureus (S. aureus, ATCC 25923) over a short incubation times (6 h). The main difference from most of the previous studies was that the air trapping was not evaluated from the extrapolation of the results of the classical sessile drop technique but from the drop rebound and Wilhelmy plate method. Additionally, all wetting tests were performed with bacteria culture medium and at 37 °C in the case of the Wilhelmy plate method. Following this approach, we were able to study the formation of the liquid/silicone interface and the associated air trapping for immersed samples that is, by far, most representative of the cell culture conditions than those associated with the sessile drop technique. Finally, the conversion of these superhydrophobic coatings into superhydrophilic ones revealed that air trapping is not a necessary condition to avoid Staphylococcus aureus retention on one of these two textured surfaces at short incubation times.
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Affiliation(s)
- Mihaela Mateescu
- Institut National de la Santé et de la Recherche Médicale , Unité Mixte de Recherche-S 1121 , Biomatériaux et Bioingénierie , 67000 Strasbourg , France
| | - Stephan Knopf
- Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488 , 68057 Mulhouse , France
| | - Frédéric Mermet
- IREPA-LASER , Boulevard Gonthier d'Andernach , Parc d'Innovation , 67400 Illkirch-Graffenstaden , France
| | - Philippe Lavalle
- Institut National de la Santé et de la Recherche Médicale , Unité Mixte de Recherche-S 1121 , Biomatériaux et Bioingénierie , 67000 Strasbourg , France
| | - Laurent Vonna
- Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488 , 68057 Mulhouse , France
- Université de Strasbourg , 67081 Strasbourg , France
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Fan P, Pan R, Zhong M. Ultrafast Laser Enabling Hierarchical Structures for Versatile Superhydrophobicity with Enhanced Cassie-Baxter Stability and Durability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16693-16711. [PMID: 31782653 DOI: 10.1021/acs.langmuir.9b02986] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The controllable and facile fabrication of surface micro/nanostructures with the required dimensions and morphologies is the key to achieving surface superhydrophobicity. With the advantages of being a noncontact, maskless, programmable, and one-step process, ultrafast laser irradiation is a very flexible and adaptive technique for fabricating various microscale, nanoscale, and micro/nanomultiscale surface structures on diverse solids, thus realizing superhydrophobicity on their surfaces. In this feature article, a comprehensive review of our recent research advances on versatile superhydrophobic surfaces enabled by ultrafast lasers is presented from the perspectives of materials, methodologies, and functionalization. The realization of superhydrophobicity and even superamphiphobicity on varied solid surfaces through ultrafast laser treatment and the underlying mechanisms for the wettability transition of ultrafast-laser-processed surfaces from superhydrophilicity to superhydrophobicity will be discussed. For the sake of practical applications, the ultrafast-laser-based strategies for the large-scale and cost-effective fabrication of superhydrophobic surface micro/nanostructures will be introduced. A special focus will be devoted to the enhancement of structural durability and the Cassie-Baxter stability of ultrafast-laser-enabled superhydrophobic surfaces. Beyond that, the achievement of integrated surface functions including remarkable wetting functions such as the directional collection of water droplets and superhydrophobic surfaces simultaneously with unique optical properties will also be presented.
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Affiliation(s)
- Peixun Fan
- Laser Materials Processing Research Centre, School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Rui Pan
- Laser Materials Processing Research Centre, School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , P. R. China
| | - Minlin Zhong
- Laser Materials Processing Research Centre, School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , P. R. China
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Ultrafast Laser Surface Texturing: A Sustainable Tool to Modify Wettability Properties of Marble. SUSTAINABILITY 2019. [DOI: 10.3390/su11154079] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Conservation strategies to reduce the degradation of stone caused by the action of water are focusing on increasing the hydrophobicity of the surface by imitating existing solutions in nature (lotus leafs and others). These are mainly based on the existence of hierarchical roughness with micro- and nanoscale structures. In the case of marble, research has focused on protective coatings that sometimes are dangerous for the health and the environment, and with undesirable effects such as color changes or reduction of water vapor permeability of the stone. Laser texturing, however, is an environmentally friendly technique, because no chemicals or toxic waste are added and, moreover, it can process nearly all types of materials. It has been used to change the surface texture of metals and other materials on a micro or even nanometric scale, to meet a specific functional requirement, such as hydrophobicity. The objective of this work was to analyze the feasibility of this technique to provide hydrophobic properties to a marble surface without appreciable changes in its appearance. Therefore, an analysis of the irradiation parameters with ultra-short-pulse laser was performed. Preliminary results demonstrate the ability of this technique to provide hydrophobic character the marble (contact angles well above 90 ∘ ). Besides, the analysis of the treated surfaces in terms of roughness, color and gloss indicates that changes in the appearance of the surface are minimal when properly selecting the process parameters.
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Hamad S, Bharati Moram SS, Yendeti B, Podagatlapalli GK, Nageswara Rao SVS, Pathak AP, Mohiddon MA, Soma VR. Femtosecond Laser-Induced, Nanoparticle-Embedded Periodic Surface Structures on Crystalline Silicon for Reproducible and Multi-utility SERS Platforms. ACS OMEGA 2018; 3:18420-18432. [PMID: 31458414 PMCID: PMC6643903 DOI: 10.1021/acsomega.8b02629] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 12/18/2018] [Indexed: 05/09/2023]
Abstract
Fabrication of reproducible and versatile surface-enhanced Raman scattering (SERS) substrates is crucial for real-time applications such as explosive detection for human safety and biological imaging for cancer diagnosis. However, it still remains a challenging task, even after several methodologies were developed by various research groups, primarily due to (a) a lack of consistency in detection of a variety of molecules (b) cost-effectiveness of the SERS substrates prepared, and (c) byzantine preparation procedures, etc. Herein, we establish a procedure for preparing reproducible SERS-active substrates comprised of laser-induced nanoparticle-embedded periodic surface structures (LINEPSS) and metallization of silicon (Si) LINEPSS. LINEPSS were fabricated using the technique of femtosecond laser ablation of Si in acetone. The versatile SERS-active substrates were then achieved by two ways, including the drop casting of silver (Ag)/gold (Au) nanoparticles (NPs) on Si LINEPSS and Ag plating on the Si LINEPSS structures. By controlling the LINEPSS grating periodicity, the effect of plasmonic nanoparticles/plasmonic plating on the Si NPs embedded periodic surface structures enormously improved the SPR strength, resulting in the consistent and superior Raman enhancements. The reproducible SERS signals were achieved by detecting the molecules of Methylene Blue (MB), 2,4-dinitrotoluene (DNT), and 5-amino-3-nitro-l,2,4-triazole (ANTA). The SERS signal strength is determined by the grating periodicity, which, in turn, is determined by the input laser fluence. The SERS-active platform with grating periodicity of 130 ± 10 nm and 150 ± 5 nm exhibited strong Raman enhancements of ∼108 for MB and ∼107 for ANTA molecules, respectively, and these platforms are demonstrated to be capable, even for multiple usages.
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Affiliation(s)
- Syed Hamad
- Advanced
Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad, Hyderabad 500046, Telangana, India
| | - Sree Satya Bharati Moram
- Advanced
Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad, Hyderabad 500046, Telangana, India
| | - Balaji Yendeti
- Advanced
Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad, Hyderabad 500046, Telangana, India
| | - G. Krishna Podagatlapalli
- Advanced
Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad, Hyderabad 500046, Telangana, India
| | | | | | - Mahamad Ahamad Mohiddon
- Centre
for Nanoscience and Technology, University
of Hyderabad, Prof. C.
R. Rao Road, Gachibowli, Hyderabad 500046, India
| | - Venugopal Rao Soma
- Advanced
Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad, Hyderabad 500046, Telangana, India
- E-mails: ,
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