scholarly journals Aggregation and Dispersion Behavior Control of Nanoparticles by Surface Structure Design

Oleoscience ◽  
2016 ◽  
Vol 16 (2) ◽  
pp. 57-63
Author(s):  
Hidehiro KAMIYA
Keyword(s):  
Surface Structure ◽  
Structure Design ◽  
Behavior Control ◽  
Dispersion Behavior

Hierarchical Nano/Micro-structured Surfaces with High Surface Area/Volume Ratios

2021 ◽  
pp. 1-36
Author(s):  
Ketki Lichade ◽  
Yizhou Jiang ◽  
Yayue Pan
Keyword(s):  
Surface Structure ◽  
Surface Area ◽  
Light Trapping ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Structure Design ◽  
Surface Structures ◽  
Structured Surfaces ◽  
Design And Manufacture

Abstract Recently, many studies have investigated additive manufacturing of hierarchical surfaces with high surface area/volume (SA/V) ratios, and their performance has been characterized for applications in next-generation functional devices. Despite recent advances, it remains challenging to design and manufacture high SA/V ratio structures with desired functionalities. In this study, we established the complex correlations among the SA/V ratio, surface structure geometry, functionality, and manufacturability in the Two-Photon Polymerization (TPP) process. Inspired by numerous natural structures, we proposed a 3-level hierarchical structure design along with the mathematical modeling of the SA/V ratio. Geometric and manufacturing constraints were modeled to create well-defined three-dimensional hierarchically structured surfaces with a high accuracy. A process flowchart was developed to design the proposed surface structures to achieve the target functionality, SA/V ratio, and geometric accuracy. Surfaces with varied SA/V ratios and hierarchy levels were designed and printed. The wettability and antireflection properties of the fabricated surfaces were characterized. It was observed that the wetting and antireflection properties of the 3-level design could be easily tailored by adjusting the design parameter settings and hierarchy levels. Furthermore, the proposed surface structure could change a naturally-hydrophilic surface to near-superhydrophobic. Geometrical light trapping effects were enabled and the antireflection property could be significantly enhanced (>80% less reflection) by the proposed hierarchical surface structures. Experimental results implied the great potential of the proposed surface structures for various applications such as microfluidics, optics, energy, and interfaces.

Relaxation of Residual Stress in Bent GaN Film on Sapphire Substrate by Laser Treatment With an Optimized Surface Structure Design

2013 ◽  
Vol 60 (2) ◽  
pp. 767-770
Author(s):  
Chih Hua Chen ◽  
M.-H. Liao ◽  
Li Cheng Chang ◽  
Ssu Chieh Kao ◽  
M.-Y. Yu ◽  
...  
Keyword(s):  
Residual Stress ◽  
Surface Structure ◽  
Laser Treatment ◽  
Sapphire Substrate ◽  
Structure Design ◽  
Gan Film

Surface Structure Design and Characterization of Bioabsorbable and Functionally Graded Apatites Originated from Bovine Bone

2006 ◽  
Vol 309-311 ◽  
pp. 1051-1054 ◽  
Author(s):  
Toshiyuki Akazawa ◽  
Masaru Murata ◽  
Junichi Tazaki ◽  
Katsuo Nakamura ◽  
Tohru Kanno ◽  
...  
Keyword(s):  
Simulated Body Fluid ◽  
Surface Structure ◽  
Body Fluid ◽  
Structure Design ◽  
Functionally Graded ◽  
Bovine Bone ◽  
Surface Areas ◽  
Small Grains ◽  
Specific Surface Areas

Abstract. Bioabsorbable and functionally graded apatites (fg-HAp) ceramics were designed using calcined bovine bone (b-HAp) by the partial dissolution-precipitation methods. The fg-HAp ceramics with micro-pores of 10-160 nm had larger specific surface areas (30-40 m2･g-1) than the b-HAp ceramics, although the two HAp ceramics exhibited same macro-pore sizes of 100-600 µm and porosities of 60-80 %. Surface structure of these ceramics was modified by soaking at 309.5 K for 1-90 days in a simulated body fluid (SBF). At 8 days after the soaking, microstructure of the fg-HAp changed from small grains to dense cocoon-like ones by rapid precipitation of HAp microcrystals, while at 14 days, that of the b-HAp was porous urchin-like grains, suggesting that the fg-HAp had higher bone-bonding ability than the b-HAp.

Surface Structure Research and Design of Drum's Coating Layer Based on Bionic Tribology

2010 ◽  
Vol 139-141 ◽  
pp. 885-888
Author(s):  
Lin Jing Xiao ◽  
Xi Jing Wang ◽  
Xiu Hua Sui ◽  
Li Fu Zhuang
Keyword(s):  
Surface Structure ◽  
Atmospheric Pressure ◽  
Coating Layer ◽  
Conveyor Belt ◽  
Transmission Efficiency ◽  
Structure Design ◽  
Layer Surface ◽  
Belt Conveyor ◽  
Research And Design ◽  
Structure Research

. The slippage often occurs between conveyor belt and driving drum, reduces the transmission efficiency and even causes accidents due to lack of enough friction. By the analysis of friction drive principle in belt conveyor, three ways were presented to increase the frictional traction. Learning from the bionic tribology theory, we proposed a new structure design of the drum coating layer surface. The micro contact area of fly's seta that can adhere to any surface was taken as a prototype, and its microscopic structure was analyzed, then the surface structure of coating layer with recess long blocks was designed, finally, the solid modeling was created with CAD software. The new surface has sub atmospheric pressure absorption. The purpose is to increase the friction between conveyor belt and driving drum, and to avoid the slippage.

scholarly journals Boosting Cell Performance of LiNi 0.8 Co 0.15 Al 0.05 O 2 via Surface Structure Design

Small ◽  
2019 ◽  
Vol 15 (50) ◽  
pp. 1904854 ◽  
Author(s):  
Junchao Zheng ◽  
Zhuo Yang ◽  
Alvin Dai ◽  
Linbo Tang ◽  
Hanxin Wei ◽  
...  
Keyword(s):  
Surface Structure ◽  
Structure Design ◽  
Cell Performance

scholarly journals Bionic Stiffener Layout Optimization with a Flexible Plate in Solar-Powered UAV Surface Structure Design

2019 ◽  
Vol 9 (23) ◽  
pp. 5196 ◽  
Author(s):  
You Ding ◽  
Zhou Zhou ◽  
ZhengPing Wang ◽  
HongJun Liu ◽  
KeLei Wang
Keyword(s):  
Surface Structure ◽  
Structure Design ◽  
Flexible Plate ◽  
Long Span ◽  
L System ◽  
Final Design ◽  
Stiffener Layout ◽  
Solar Powered ◽  
Searching Method ◽  
Stiffener Layout Optimization

A cellular-based evolutionary topology optimization scheme over a small curvature big contour wing surface is proposed for the design of an ultralight surface structure. Using this method, a ground-structure technique is first applied to obtain homogeneous mesh generation with a predefined weight value over the design domain. Secondly, the stiffener path’s description is guided by a modified map L system topology method that simulates the growth of the bionic branch, and the structural components are obtained by the specified searching method according to weights of the previous mesh vertexes. Thirdly, an optimal curved stiffener layout is achieved using an agent-based algorithm to create individual instances of designs based on a small number of input parameters. These parameters can then be controlled by a genetic algorithm to optimize the final design according to goals like minimizing weight and structural weakness. A comparison is implemented for long-span panel stiffener layout generation between an initial straight case and a bionic optimal case via our method, thereby indicating the significant improvement of the buckling loads by steering the stiffener’s path. Finally, this bionic method is applied to the wing box structure design and achieves remarkable weight loss at last.

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