Biomimetic and bioinspired surface topographies as a green strategy for combating biofouling: A review

2021 ◽  
Author(s):  
Andre Eccel Vellwock ◽  
Haimin Yao
Keyword(s):  
Surface Topographies ◽  
Green Strategy

scholarly journals Evolutionary design of optimal surface topographies for biomaterials

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Aliaksei Vasilevich ◽  
Aurélie Carlier ◽  
David A. Winkler ◽  
Shantanu Singh ◽  
Jan de Boer
Keyword(s):  
High Throughput Screening ◽  
Random Mutagenesis ◽  
Material Design ◽  
Fitness Assessment ◽  
Surface Topographies ◽  
Optimal Surface ◽  
Design Production ◽  
Brute Force Approach ◽  
Survival Of The Fittest ◽  
Selection Of

AbstractNatural evolution tackles optimization by producing many genetic variants and exposing these variants to selective pressure, resulting in the survival of the fittest. We use high throughput screening of large libraries of materials with differing surface topographies to probe the interactions of implantable device coatings with cells and tissues. However, the vast size of possible parameter design space precludes a brute force approach to screening all topographical possibilities. Here, we took inspiration from Nature to optimize materials surface topographies using evolutionary algorithms. We show that successive cycles of material design, production, fitness assessment, selection, and mutation results in optimization of biomaterials designs. Starting from a small selection of topographically designed surfaces that upregulate expression of an osteogenic marker, we used genetic crossover and random mutagenesis to generate new generations of topographies.

Related Protein–Protein Interaction Modules Present Drastically Different Surface Topographies Despite A Conserved Helical Platform

2003 ◽  
Vol 330 (5) ◽  
pp. 1117-1129 ◽  
Author(s):  
Poopak Banky ◽  
Melinda Roy ◽  
Marceen G Newlon ◽  
Dimitrios Morikis ◽  
Nina M Haste ◽  
...  
Keyword(s):  
Protein Interaction ◽  
Related Protein ◽  
Protein Protein Interaction ◽  
Surface Topographies

scholarly journals Effect of Al2O3 Sandblasting Particle Size on the Surface Topography and Residual Compressive Stresses of Three Different Dental Zirconia Grades

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 610
Author(s):  
Hee-Kyung Kim ◽  
Byungmin Ahn
Keyword(s):  
Particle Size ◽  
Residual Stresses ◽  
Surface Topography ◽  
Tetragonal Zirconia ◽  
Peak Shift ◽  
Confocal Laser ◽  
Compressive Stresses ◽  
Surface Topographies ◽  
Altered Surface ◽  
Tetragonal Zirconia Polycrystal

This study investigated the effect of sandblasting particle size on the surface topography and compressive stresses of conventional zirconia (3 mol% yttria-stabilized tetragonal zirconia polycrystal; 3Y-TZP) and two highly translucent zirconia (4 or 5 mol% partially stabilized zirconia; 4Y-PSZ or 5Y-PSZ). Plate-shaped zirconia specimens (14.0 × 14.0 × 1.0 mm3, n = 60 for each grade) were sandblasted using different Al2O3 sizes (25, 50, 90, 110, and 125 μm) under 0.2 MPa for 10 s/cm2 at a 10 mm distance and a 90° angle. The surface topography was characterized using a 3-D confocal laser microscopy and inspected with a scanning electron microscope. To assess residual stresses, the tetragonal peak shift at 147 cm−1 was traced using micro-Raman spectroscopy. Al2O3 sandblasting altered surface topographies (p < 0.05), although highly translucent zirconia showed more pronounced changes compared to conventional zirconia. 5Y-PSZ abraded with 110 μm sand showed the highest Sa value (0.76 ± 0.12 μm). Larger particle induced more compressive stresses for 3Y-TZP (p < 0.05), while only 25 μm sand induced residual stresses for 5Y-PSZ. Al2O3 sandblasting with 110 μm sand for 3Y-TZP, 90 μm sand for 4Y-PSZ, and 25 μm sand for 5Y-PSZ were considered as the recommended blasting conditions.

Ti-6Al-4V Surfaces in SiC Powder Mixed Electrical Discharge Machining

2013 ◽  
Vol 856 ◽  
pp. 226-230 ◽  
Author(s):  
Hamidullah Yaşar ◽  
Bülent Ekmekci
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Dielectric Liquid ◽  
Operational Parameters ◽  
Electrical Parameters ◽  
Machined Surface ◽  
Optical Scanning ◽  
Surface Topographies ◽  
Powder Suspension

The role of suspended particles on Ti-6Al-4V surface in Powder Mixed Electrical Discharge Machining (PMEDM) is studied using SiC powder mixing in water dielectric liquid. Surface modifications due to the additives in dielectric liquid are investigated by means of optical, scanning electron microscopy and energy dispersive spectroscopy. The attachment of added powders and surface topographies interrelated with powder suspension concentration, particle size and electrical parameters such as pulse on duration and current. The influence on discharge transitivity with respect to SiC additives is noticed with pock like features on the surface. The geometry and size of these features indicated a robust dependency with respect to operational parameters and indicated the role of secondary discharges during PMEDM. SiC particles severely transferred from di-electric liquid to machined surface at critical operational parameters and implied that the process could be also used as a surface alloying technique.

Gleitreibung der tribologischen Paarung CFK – Werkzeugschneidenoberfläche*/Sliding friction of the tribological pair of CFRP / tool cutting surface

2017 ◽  
Vol 107 (01-02) ◽  
pp. 81-86
Author(s):  
T. Stehle ◽  
B. Prof. Azarhoushang ◽  
D. Becker ◽  
R. Eisseler
Keyword(s):  
Sliding Friction ◽  
Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Test Tool ◽  
Cutting Surface ◽  
Surface Topographies ◽  
Tool Surface ◽  
Strip Drawing ◽  
And Function ◽  
Tool Cutting

Die Reibungsbedingungen bei der Zerspanung von verstärkten Faserverbundkunststoffen werden durch die Oberflächengestalt der Werkzeugschneide beeinflusst. In dieser Studie wurde CFK-UD (unidirektional carbonfaserverstärkter Kunststoff) im Streifenziehversuch mit geschliffenen und gestrahlten Testwerkzeugen bei 5 MPa Flächenpressung untersucht. Die Oberflächen der Testwerkzeuge sind durch bestimmte Rauheits- und Funktionsparameter charakterisiert, die sich auf die Gleitreibung der tribologischen Paarung CFK – Werkzeugschneide auswirken. &nbsp; The friction conditions when cutting fiber-reinforced polymers are significantly influenced by the shape of the tool cutting surface. Hence, different strip drawing tests were carried out at a 5 MPa surface pressure to investigate the behavior of unidirectional CFRP with different test tool surface preparations. The tool surfaces were ground and blasted. The created surface topographies are characterized by particular parameters of roughness and function which affect the sliding friction of the CFRP / tool pair.

Laser ultrasonic inspection of defects in wire + arc additive manufactured samples with different surface topographies

Measurement ◽  
2021 ◽  
pp. 110597
Author(s):  
Yan Zeng ◽  
Xiaokai Wang ◽  
Xunpeng Qin ◽  
Lin Hua ◽  
Guocheng Liu ◽  
...  
Keyword(s):  
Ultrasonic Inspection ◽  
Laser Ultrasonic ◽  
Surface Topographies
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