Smart surfaces with reversibly switchable wettability: Concepts, synthesis and applications

2021 ◽  
pp. 102584
Author(s):  
Hui Liu ◽  
Li Zhang ◽  
Jianying Huang ◽  
Jiajun Mao ◽  
Zhong Chen ◽  
...  
Keyword(s):  
Smart Surfaces

scholarly journals Nanotechnology-Based Antimicrobial and Antiviral Surface Coating Strategies

Prosthesis ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 25-52
Author(s):  
Pelin Erkoc ◽  
Fulden Ulucan-Karnak
Keyword(s):  
Biological Sciences ◽  
Clinical Performance ◽  
Global Strategy ◽  
Surface Coatings ◽  
Cationic Polymers ◽  
Functional Material ◽  
Metal Coatings ◽  
Antimicrobial Surfaces ◽  
Smart Surfaces ◽  
Surface Development

Biocontamination of medical devices and implants is a growing issue that causes medical complications and increased expenses. In the fight against biocontamination, developing synthetic surfaces, which reduce the adhesion of microbes and provide biocidal activity or combinatory effects, has emerged as a major global strategy. Advances in nanotechnology and biological sciences have made it possible to design smart surfaces for decreasing infections. Nevertheless, the clinical performance of these surfaces is highly depending on the choice of material. This review focuses on the antimicrobial surfaces with functional material coatings, such as cationic polymers, metal coatings and antifouling micro-/nanostructures. One of the highlights of the review is providing insights into the virus-inactivating surface development, which might particularly be useful for controlling the currently confronted pandemic coronavirus disease 2019 (COVID-19). The nanotechnology-based strategies presented here might be beneficial to produce materials that reduce or prevent the transmission of airborne viral droplets, once applied to biomedical devices and protective equipment of medical workers. Overall, this review compiles existing studies in this broad field by focusing on the recent related developments, draws attention to the possible activity mechanisms, discusses the key challenges and provides future recommendations for developing new, efficient antimicrobial and antiviral surface coatings.

scholarly journals Wrinkling instabilities in soft bilayered systems

2017 ◽  
Vol 375 (2093) ◽  
pp. 20160163 ◽  
Author(s):  
Silvia Budday ◽  
Sebastian Andres ◽  
Bastian Walter ◽  
Paul Steinmann ◽  
Ellen Kuhl
Keyword(s):  
Period Doubling ◽  
Media Theory ◽  
Analytical Models ◽  
Control Parameters ◽  
Computational Simulations ◽  
Smart Surfaces ◽  
Post Buckling ◽  
Surface Patterns ◽  
Secondary Instabilities ◽  
Secondary Bifurcations

Wrinkling phenomena control the surface morphology of many technical and biological systems. While primary wrinkling has been extensively studied, experimentally, analytically and computationally, higher-order instabilities remain insufficiently understood, especially in systems with stiffness contrasts well below 100. Here, we use the model system of an elastomeric bilayer to experimentally characterize primary and secondary wrinkling at moderate stiffness contrasts. We systematically vary the film thickness and substrate prestretch to explore which parameters modulate the emergence of secondary instabilities, including period-doubling, period-tripling and wrinkle-to-fold transitions. Our experiments suggest that period-doubling is the favourable secondary instability mode and that period-tripling can emerge under disturbed boundary conditions. High substrate prestretch can suppress period-doubling and primary wrinkles immediately transform into folds. We combine analytical models with computational simulations to predict the onset of primary wrinkling, the post-buckling behaviour, secondary bifurcations and the wrinkle-to-fold transition. Understanding the mechanisms of pattern selection and identifying the critical control parameters of wrinkling will allow us to fabricate smart surfaces with tunable properties and to control undesired surface patterns like in the asthmatic airway. This article is part of the themed issue ‘Patterning through instabilities in complex media: theory and applications.’

scholarly journals Link Budget Analysis for Reconfigurable Smart Surfaces in Aerial Platforms

2020 ◽  
Author(s):  
SAFWAN ALFATTANI ◽  
Wael Jaafar ◽  
Yassine Hmamouche ◽  
Halim Yanikomeroglu ◽  
Abbas Yongacoglu
Keyword(s):  
Communication Systems ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Budget Analysis ◽  
Smart Surfaces ◽  
Aerial Vehicle ◽  
Link Budget ◽  
Aerial Platforms ◽  
High Altitude Platform Station ◽  
Aerial Platform

In this paper, we derive the link budget relations for<br>communications assisted by reconfigurable smart surfaces (RSS).<br>Specifically, under specular and scattering paradigms, we provide<br>link budget expressions for an RSS-assisted communication on<br>the ground, where the RSS is either mounted on a building, or on<br>an aerial platform, such as an unmanned aerial vehicle (UAV),<br>a high altitude platform station (HAPS), or a low-earth orbit<br>satellite (LEO). The obtained numerical results provide design<br>guidelines for RSS-assisted communication systems, including the<br>recommended aerial platform to use, the size of RSS for each<br>type of the platforms, and the operating frequencies. <br>

Smart Surfaces: Magnetically Switchable Light Diffraction through Actuation of Superparamagnetic Plate‐Like Microrods by Dynamic Magnetic Stray Field Landscapes

2018 ◽  
Vol 6 (14) ◽  
pp. 1800133 ◽  
Author(s):  
Iris Koch ◽  
Tim Granath ◽  
Sebastian Hess ◽  
Timo Ueltzhöffer ◽  
Sarah Deumel ◽  
...  
Keyword(s):  
Light Diffraction ◽  
Stray Field ◽  
Smart Surfaces

Thermosensitive “Smart” Surfaces for Biorecognition Based Cell Adhesion and Controlled Detachment

2020 ◽  
pp. 2000277
Author(s):  
Silvia Brunato ◽  
Francesca Mastrotto ◽  
Federica Bellato ◽  
Mariangela Garofalo ◽  
Thomas Göddenhenrich ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Smart Surfaces

scholarly journals Mixed Polymer Brushes for “Smart” Surfaces

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1553 ◽  
Author(s):  
Mingxiao Li ◽  
Christian W. Pester
Keyword(s):  
Phase Behavior ◽  
Experimental Work ◽  
Smart Materials ◽  
Polymer Brushes ◽  
State Of The Art ◽  
Future Studies ◽  
Smart Surfaces ◽  
Synthetic Approaches ◽  
Novel Applications ◽  
External Stimuli

Mixed polymer brushes (MPBs) are composed of two or more disparate polymers covalently tethered to a substrate. The resulting phase segregated morphologies have been extensively studied as responsive “smart” materials, as they can be reversible tuned and switched by external stimuli. Both computational and experimental work has attempted to establish an understanding of the resulting nanostructures that vary as a function of many factors. This contribution highlights state-of-the-art MPBs studies, covering synthetic approaches, phase behavior, responsiveness to external stimuli as well as novel applications of MPBs. Current limitations are recognized and possible directions for future studies are identified.

Titanium dioxide based self-cleaning smart surfaces: A short review

2020 ◽  
Vol 8 (5) ◽  
pp. 104211 ◽  
Author(s):  
Nisha T. Padmanabhan ◽  
Honey John
Keyword(s):  
Titanium Dioxide ◽  
Short Review ◽  
Smart Surfaces ◽  
Self Cleaning

Thermodynamic, Structural, and Piezoelectric Properties of Adatom-Doped Phosphorene and Its Applications in Smart Surfaces

2020 ◽  
Vol 13 (5) ◽  
Author(s):  
Lou Li ◽  
Huiying Cao ◽  
Bo Xu ◽  
Junkai Deng ◽  
Jingran Liu ◽  
...  
Keyword(s):  
Piezoelectric Properties ◽  
Smart Surfaces
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