Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

Ji, Jie; Meng, Kangnan; Li, Pin; Shen, Zongbao

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Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

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22 lut 2024

Materials Science-Poland

Tom 41 (2023): Zeszyt 3 (Wrzesień 2023)

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Data publikacji: 22 lut 2024

Zakres stron: 140 - 158

Otrzymano: 11 paź 2023

Przyjęty: 09 sty 2024

DOI: https://doi.org/10.2478/msp-2023-0039

Słowa kluczowe
laser shock imprinting, crescent-shaped microstructure, anisotropic wettability, directional spreading of droplet, limitation of droplet spread

© 2023 Jie Ji et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Bionic crescent-shaped microstructure mold: (a) parameters of microstructure characteristics on the mold surface; (b) parameters of the crescent-shaped microstructure array on the mold surface; (c) physical mold; and (d) the physical surface structure of the mold

Two-dimensional morphologies of the microstructures for two different offset distances (P): (a) P = 0 μm; (b) P = 45 μm; (c) P = 0 μm, measurement results of a single spot imprint diameter; (d) P = 45 μm, measurement results of a single spot imprint diameter

Surface crescent-shaped microstructure of the workpiece: (a) SEM morphology of a single crescent-shaped microstructure; (b) magnification of the crescent-shaped outer arc forming region; (c) the size measurement of a single crescent-shaped microstructure; (d) magnification of the crescent-shaped left corner forming region; (e) magnification of the crescent-shaped inner arc forming region; (f) magnification of the crescent-shaped right corner forming region

Three-dimensional morphologies of the workpiece surface for two different offset distances (P). (a) P = 0 μm; (b) P = 45 μm

Three-dimensional morphologies of the workpiece surface fabricated by different LSI parameters: (a) LSE 835 mJ, 3 shocks; (b) LSE 1020 mJ, impact 3 shocks; (c) LSE 1200 mJ, 3 shocks; (d) LSE 1020 mJ, 1 shock; (e) LSE 1020 mJ, 2 shocks; (f) LSE 1020 mJ, 3 shocks

Influence of LSI processing parameters on the forming height of crescent-shaped microstructures on the workpiece surface

Schematic diagram of dynamic changes of the workpiece and soft film imprinted by multiple LSIs. (a) the first LSI; (b) the second LSI

Heights of crescent-shaped microstructures at different positions: (a) center of symmetry; (b) near the right rounded corner; (c) localized inner cross section; (d) contour line at position (a); (e) contour line at position (b); (f) contour line at position (c)

Schematic diagram of the effect of different width molds on forming depth: (a) wide mold; (b) narrow mold

Two different constraint cases: (a) two directions; (b) three directions

Comparison of ablated layers processed with diverse LSI parameters: (a) LSE 835 mJ, 3 shocks; (b) LSE 1020 mJ, 3 shocks; (c) LSE 1200 mJ, 3 shocks

Contact angle diagram on the surface of the workpiece. Contact angle on the surface of raw material (left), contact angle on the surface of crescent-shaped microstructure (right)

Effect of different LSI processing parameters on the contact angle: (a) effect of the number of laser shocks on the contact angle; (b) effect of LSE on the contact angle

Contact angle diagram of water droplets on the workpiece surface in two directions: (a) parallel (//) direction; (b) perpendicular (⊥) direction

Influence of the offset distance (P) of the alignment of crescent-shaped microstructure features on the contact angle difference of water droplets on their surfaces

Residual droplet morphology on crescent-shaped, microstructured workpiece surface: (a) Droplet overall solid-liquid contact line; (b) solid-liquid contact line of droplet on the surface of workpiece on the bottom of the arc

Modeling of solid–liquid contact lines of crescent-shaped microstructures: (a) location of some solid–liquid contact lines of crescent-shaped microstructures; (b) mathematical modeling of solid–liquid contact lines of crescent-shaped microstructures

Schematic diagram of the wettability gradient surface of the crescent-shaped microstructure: (a) low wettability zone; (b) high wettability zone

Schematic diagram of the theory of directional spreading of liquid droplet

Schematic diagram of the method of fabricating type-I flow channel by LSI

Type-1 flow channel composed of crescent-shaped microstructure arrays: (a) schematic diagram of the principle of type-I flow channel; (b) a partially magnified image of the microstructured zone; (c) fabricated type-I flow channel morphology; (d) local morphology of type-I flow channel

Water droplet spreading mode on the surface of the type-I flow channel: (a) comparison of water droplet morphology in the flow channel and raw material areas; (b) morphology of water droplets on both sides of the microstructure area inside the flow channel area

Diagram of water droplet movement position within the flow channel: (a) flow channel without water droplets; (b) flow channel after water droplet injection; (c) schematic diagram of water droplet spreading position within the flow channel

Process parameters for LSI

LSE¹ (mJ)	Number of laser shocks (times)
835	1	2	3
1020	1	2	3
1200	1	2	3

Materials for LSI

Functionality	Constraint layer	Ablative layer	Soft film	Workpiece
Material	PMMA	Aluminum foil	Polyurethane	Copper foil
Thickness	3 mm	20 μm	100 μm	10 μm

Parameters of the fabricated molds

Mold	P	L	R₁	R₂	R₃	X₀	Y₀
type	(μ m)	(μ m)	(μ m)	(μ m)	(μ m)	(μ m)	(μ m)
Mold 1	0	45	30	36	4	90	60
Mold 2	30
Mold 3	45

Język:: Angielski

Częstotliwość wydawania:: 4 razy w roku
Dziedziny czasopisma:: Nauka o materiałach, Nauka o materiałach, inne, Nanomateriały, Funkcjonalne i inteligentne materiały, Charakterystyka i właściwości materiałów

Kanał RSS czasopisma

Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

Data publikacji: 22 lut 2024

Zakres stron: 140 - 158

Otrzymano: 11 paź 2023

Przyjęty: 09 sty 2024

DOI: https://doi.org/10.2478/msp-2023-0039

Słowa kluczowe
laser shock imprinting, crescent-shaped microstructure, anisotropic wettability, directional spreading of droplet, limitation of droplet spread

© 2023 Jie Ji et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Process parameters for LSI

Materials for LSI

Parameters of the fabricated molds

Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

Jie Ji

Kangnan Meng

Pin Li

Zongbao Shen

Data publikacji: 22 lut 2024

Zakres stron: 140 - 158

Otrzymano: 11 paź 2023

Przyjęty: 09 sty 2024

DOI: https://doi.org/10.2478/msp-2023-0039

Słowa kluczowelaser shock imprinting, crescent-shaped microstructure, anisotropic wettability, directional spreading of droplet, limitation of droplet spread

© 2023 Jie Ji et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Fig. 25.

Process parameters for LSI

Materials for LSI

Parameters of the fabricated molds

Słowa kluczowe
laser shock imprinting, crescent-shaped microstructure, anisotropic wettability, directional spreading of droplet, limitation of droplet spread