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< Page ,Total 29 >
Reducing Adhesion for Dispensing Tiny Water/Oil Droplets and Gas Bubbles by Femtosecond Laser-Treated Needle Nozzles: Superhydrophobicity, Superoleophobicity, and Superaerophobicity EI SCIE
期刊论文 | 2019 , 5 (2) , 241-249 | ChemNanoMat
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Abstract :

Three-level microstructures were formed on the stainless-steel surfaces by simple femtosecond laser ablation. The structured surfaces exhibit superhydrophilicity in air and superoleophobicity/superaerophobicity in water. After further stearic acid modification, the surfaces turned to superhydrophobicity and underwater superoleophilicity/superaerophilicity. Through this technique, the nozzle of a needle is transformed to possess superwettabilities. When the nozzles were used to release liquid and gas, the sizes of the dispensed water and oil droplets and air bubbles were dramatically reduced. Particularly, we demonstrate that the underwater superaerophobic nozzle could dispense air bubbles in nanoliter volume without the need of reducing the nozzle diameter. The liquid retention at the opening of the needle was also effectively prevented. Therefore, the reduced droplet/bubble size and retention allow us to achieve a dramatically enhanced volume accuracy and resolution during manipulation and transport of aqueous solutions and gases. The femtosecond laser-induced superwetting nozzles can be used in high-resolution liquid transport, inkjet printing, 3D printing, pipettes, medical devices, cell engineering, biological detection, microchemical reactor, and reducing industrial gas emission. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keyword :

Biological detection Micro-chemical reactors Stainless steel surface Structured surfaces Super-hydrophilicity superaerophobicity Superhydrophobicity Superoleophobicity

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GB/T 7714 Yong, Jiale , Singh, Subhash C. , Zhan, Zhibing et al. Reducing Adhesion for Dispensing Tiny Water/Oil Droplets and Gas Bubbles by Femtosecond Laser-Treated Needle Nozzles: Superhydrophobicity, Superoleophobicity, and Superaerophobicity [J]. | ChemNanoMat , 2019 , 5 (2) : 241-249 .
MLA Yong, Jiale et al. "Reducing Adhesion for Dispensing Tiny Water/Oil Droplets and Gas Bubbles by Femtosecond Laser-Treated Needle Nozzles: Superhydrophobicity, Superoleophobicity, and Superaerophobicity" . | ChemNanoMat 5 . 2 (2019) : 241-249 .
APA Yong, Jiale , Singh, Subhash C. , Zhan, Zhibing , Huo, Jinglan , Chen, Feng , Guo, Chunlei . Reducing Adhesion for Dispensing Tiny Water/Oil Droplets and Gas Bubbles by Femtosecond Laser-Treated Needle Nozzles: Superhydrophobicity, Superoleophobicity, and Superaerophobicity . | ChemNanoMat , 2019 , 5 (2) , 241-249 .
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How To Obtain Six Different Superwettabilities on a Same Microstructured Pattern: Relationship between Various Superwettabilities in Different Solid/Liquid/Gas Systems. PubMed SCIE
期刊论文 | 2019 , 35 (4) , 921-927 | Langmuir : the ACS journal of surfaces and colloids
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Abstract :

A range of different superwettabilities were obtained on femtosecond laser-structured Al surfaces. The formation mechanism of each superwetting state is discussed in this paper. It is revealed that the underwater oil droplet and bubble wettabilities of a solid surface have a close relationship with its water wettability. The laser-induced hierarchical microstructures showed superhydrophilicity in air but showed superoleophobicity/superaerophobicity after immersion in water. When such microstructures were further modified with a low-surface-energy monolayer, the wettability of the resultant surface would turn to superhydrophobicity with ultralow water adhesion in air and superoleophilicity/superaerophilicity in water. The understanding of the relationship among the above-mentioned six different superwettabilities is highly important in the design of various superwetting microstructures, transforming the structures from one superwetting state to another state and better using the artificial superwetting materials.

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GB/T 7714 Yong Jiale , Singh Subhash C , Zhan Zhibing et al. How To Obtain Six Different Superwettabilities on a Same Microstructured Pattern: Relationship between Various Superwettabilities in Different Solid/Liquid/Gas Systems. [J]. | Langmuir : the ACS journal of surfaces and colloids , 2019 , 35 (4) : 921-927 .
MLA Yong Jiale et al. "How To Obtain Six Different Superwettabilities on a Same Microstructured Pattern: Relationship between Various Superwettabilities in Different Solid/Liquid/Gas Systems." . | Langmuir : the ACS journal of surfaces and colloids 35 . 4 (2019) : 921-927 .
APA Yong Jiale , Singh Subhash C , Zhan Zhibing , Chen Feng , Guo Chunlei . How To Obtain Six Different Superwettabilities on a Same Microstructured Pattern: Relationship between Various Superwettabilities in Different Solid/Liquid/Gas Systems. . | Langmuir : the ACS journal of surfaces and colloids , 2019 , 35 (4) , 921-927 .
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Substrate-Independent, Fast, and Reversible Switching between Underwater Superaerophobicity and Aerophilicity on the Femtosecond Laser-Induced Superhydrophobic Surfaces for Selectively Repelling or Capturing Bubbles in Water. PubMed SCIE
期刊论文 | 2019 | ACS applied materials & interfaces
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Abstract :

In this paper, the reversible switching between underwater (super-) aerophilicity and superaerophobicity was achieved on various femtosecond (fs) laser-induced superhydrophobic surfaces. A range of materials including Al, stainless steel, Cu, Ni, Si, poly(tetrafluoroethylene), and polydimethylsiloxane were first transformed to superhydrophobic after the formation of surface microstructures through fs laser treatment. These surfaces showed (super-) aerophilicity when immersed in water. In contrast, if the surface was prewetted with ethanol and then dipped into water, the surfaces showed superaerophobicity in water. The underwater aerophilicity of the superhydrophobic substrates could easily recover by drying. The switching between the underwater aerophilicity and superaerophobicity can be fast repeated many cycles and is substrate-independent in stark contrast to common wettability-switchable surfaces based on stimuli-responsive chemistry. Therefore, the as-prepared superhydrophobic surfaces can capture or repel air bubbles in water by selectively switching between underwater superaerophobicity and aerophilicity. Finally, we demonstrated that the underwater bubbles could pass through an underwater aerophilic porous sheet but were intercepted by an underwater superaerophobic porous sheet. The selective passage of the underwater bubbles was achieved by the reversible switching between the underwater aerophilicity and superaerophobicity. We believe that this substrate-independent and fast method of switching air wettability has important applications in controlling air behavior in water.

Keyword :

switchable wettability underwater superaerophilicity femtosecond laser bubble wettability underwater superaerophobicity

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GB/T 7714 Yong Jiale , Singh Subhash C , Zhan Zhibing et al. Substrate-Independent, Fast, and Reversible Switching between Underwater Superaerophobicity and Aerophilicity on the Femtosecond Laser-Induced Superhydrophobic Surfaces for Selectively Repelling or Capturing Bubbles in Water. [J]. | ACS applied materials & interfaces , 2019 .
MLA Yong Jiale et al. "Substrate-Independent, Fast, and Reversible Switching between Underwater Superaerophobicity and Aerophilicity on the Femtosecond Laser-Induced Superhydrophobic Surfaces for Selectively Repelling or Capturing Bubbles in Water." . | ACS applied materials & interfaces (2019) .
APA Yong Jiale , Singh Subhash C , Zhan Zhibing , Chen Feng , Guo Chunlei . Substrate-Independent, Fast, and Reversible Switching between Underwater Superaerophobicity and Aerophilicity on the Femtosecond Laser-Induced Superhydrophobic Surfaces for Selectively Repelling or Capturing Bubbles in Water. . | ACS applied materials & interfaces , 2019 .
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Integration of Great Water Repellence and Imaging Performance on a Superhydrophobic PDMS Microlens Array by Femtosecond Laser Microfabrication EI
期刊论文 | 2018 | Advanced Engineering Materials
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Abstract :

Microlens arrays (MLAs), as the important optical devices, are easily polluted by the water droplets or power-like-contaminates in the air. Endowing the artificial MLAs with anti-water and self-cleaning abilities remains great challenge. In this paper, the authors report a novel method for fabricating superhydrophobic polydimethylsiloxane (PDMS) MLAs by the combination of femtosecond laser wet etching and femtosecond laser direct writing methods. The resultant surface is composed of a convex MLA and the surrounding rough micro/nanoscale hierarchical structures. Water droplet on the surface of the as-prepared MLA shows a contact angle of 162° and can easily roll away when the substrate is slightly tilted 0.5°. In addition to their excellent imaging performance, such ultralow adhesive and ultrahigh superhydrophobicity also endows the as-prepared MLA with excellent anti-water ability as well as the self-cleaning function relative to the normal MLA. The authors believe that the anti-water and self-cleaning MLAs will potentially have many important applications in solar cells, medical endoscopes, and other optical systems that are often used in the humid environment or outdoors. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keyword :

Femtosecond laser microfabrication Hierarchical structures Imaging performance Medical endoscopes Micro-lens arrays Polydimethylsiloxane PDMS Self cleaning Superhydrophobicity

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GB/T 7714 Li, Minjing , Yang, Qing , Chen, Feng et al. Integration of Great Water Repellence and Imaging Performance on a Superhydrophobic PDMS Microlens Array by Femtosecond Laser Microfabrication [J]. | Advanced Engineering Materials , 2018 .
MLA Li, Minjing et al. "Integration of Great Water Repellence and Imaging Performance on a Superhydrophobic PDMS Microlens Array by Femtosecond Laser Microfabrication" . | Advanced Engineering Materials (2018) .
APA Li, Minjing , Yang, Qing , Chen, Feng , Yong, Jiale , Bian, Hao , Wei, Yang et al. Integration of Great Water Repellence and Imaging Performance on a Superhydrophobic PDMS Microlens Array by Femtosecond Laser Microfabrication . | Advanced Engineering Materials , 2018 .
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Femtosecond laser induced underwater superaerophilic and superaerophobic PDMS sheets with through microholes for selective passage of air bubbles and further collection of underwater gas EI SCIE PubMed Scopus
期刊论文 | 2018 , 10 (8) , 3688-3696 | NANOSCALE
WoS CC Cited Count: 9 SCOPUS Cited Count: 10
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Abstract :

Controlling underwater bubble behavior on a solid surface is of great research significance, particularly in extreme cases. However, the realization of artificial underwater superaerophobic or superaerophilic surfaces is still a challenge. Herein, a micro/nanoscale hierarchical rough structure was formed on polydimethylsiloxane (PDMS) surface by one-step femtosecond laser ablation. The as-prepared surface showed superhydrophobicity in air and superaerophilicity in water. Interestingly, the wettability of such a PDMS surface could be easily switched to in-air superhydrophilicity and underwater superaerophobicity once it was further irradiated by oxygen plasma because the surface chemistry changed. The original femtosecond laser-structured underwater superaerophilic PDMS surface could absorb/capture bubbles, while the plasma-treated underwater superaerophobic surface had excellent anti-bubble ability in water. A rough through-microhole-array PDMS sheet was prepared by a mechanical drilling process and subsequent femtosecond laser ablation. The sheet could selectively allow bubbles to pass, that is, the porous underwater superaerophilic sheet allowed bubbles to pass through, while the porous underwater superaerophobic sheet was able to intercept bubbles in a water medium. Using the porous underwater superaerophilic PDMS sheet as the core component, a device that has great ability of collecting underwater bubbles/gas was also designed.

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GB/T 7714 Yong, Jiale , Chen, Feng , Huo, Jinglan et al. Femtosecond laser induced underwater superaerophilic and superaerophobic PDMS sheets with through microholes for selective passage of air bubbles and further collection of underwater gas [J]. | NANOSCALE , 2018 , 10 (8) : 3688-3696 .
MLA Yong, Jiale et al. "Femtosecond laser induced underwater superaerophilic and superaerophobic PDMS sheets with through microholes for selective passage of air bubbles and further collection of underwater gas" . | NANOSCALE 10 . 8 (2018) : 3688-3696 .
APA Yong, Jiale , Chen, Feng , Huo, Jinglan , Fang, Yao , Yang, Qing , Zhang, Jingzhou et al. Femtosecond laser induced underwater superaerophilic and superaerophobic PDMS sheets with through microholes for selective passage of air bubbles and further collection of underwater gas . | NANOSCALE , 2018 , 10 (8) , 3688-3696 .
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Bioinspired Fabrication of Bi/Tridirectionally Anisotropic Sliding Superhydrophobic PDMS Surfaces by Femtosecond Laser SCIE Scopus
期刊论文 | 2018 , 5 (6) | ADVANCED MATERIALS INTERFACES
WoS CC Cited Count: 4 SCOPUS Cited Count: 4
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Abstract :

Precisely arranged multiscale microstructures in living systems provide inspirations for the fabrication of artificial advanced materials and devices. Recently, uni-bioinspired surfaces with anisotropic wettability are built for various applications. Here, a kind of bi-bioinspired (rice leaf and butterfly wing) tridirectionally anisotropic sliding superhydrophobic surface for the first time is reported. First, a microgroove array structured polydimethylsiloxane surface is constructed by selective femtosecond laser ablation. The as-prepared surface shows bidirectional anisotropy which can be easily tuned by the width (L) and the depth of the microgrooves. A steps structure is further introduced into the microgrooves. Interestingly, tridirectionally anisotropic sliding superhydrophobicity that combined the rice-leaf-like and butterfly-wing-like anisotropy is achieved on such surface. The tridirectional anisotropy is demonstrated to result from the directional steps structures and the uneven distribution of rough structures. The bi/tridirectionally anisotropic sliding property will provide a fresh cognition of anisotropic wettability for researchers and have enormous potential applications in smart microfluidic systems.

Keyword :

superhydrophobicity "steps" structures bi/tridirectional anisotropy microgroove arrays femtosecond lasers

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GB/T 7714 Fang, Yao , Yong, Jiale , Chen, Feng et al. Bioinspired Fabrication of Bi/Tridirectionally Anisotropic Sliding Superhydrophobic PDMS Surfaces by Femtosecond Laser [J]. | ADVANCED MATERIALS INTERFACES , 2018 , 5 (6) .
MLA Fang, Yao et al. "Bioinspired Fabrication of Bi/Tridirectionally Anisotropic Sliding Superhydrophobic PDMS Surfaces by Femtosecond Laser" . | ADVANCED MATERIALS INTERFACES 5 . 6 (2018) .
APA Fang, Yao , Yong, Jiale , Chen, Feng , Huo, Jinglan , Yang, Qing , Zhang, Jingzhou et al. Bioinspired Fabrication of Bi/Tridirectionally Anisotropic Sliding Superhydrophobic PDMS Surfaces by Femtosecond Laser . | ADVANCED MATERIALS INTERFACES , 2018 , 5 (6) .
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Oil-Water Separation Based on the Materials with Special Wettability SCIE Scopus CSCD PKU
期刊论文 | 2018 , 34 (5) , 456-475 | ACTA PHYSICO-CHIMICA SINICA
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Abstract :

The frequency of oil-spill accidents and industrial wastewater discharges have caused severe water pollution, not only resulting in huge economic losses but also threatening the ecological system. Recently, researchers have developed different types of materials with special wettability (such as superhydrophobicity or superoleophobicity) and used them successfully for oil-water separation. Superhydrophobic and superoleophobic surfaces can generally be obtained by designing the surface geometric micro-topography and chemical composition of solid materials. Endowing porous materials with reverse super-wettability to water and oil using various microfabrication technologies is the key to separate oil-water mixtures. In this review we initially identify the significance of fabricating oil/water-separating materials and achieving effective separations. Then, the typical theoretical principles underlying surface wettability are briefly introduced. According to the difference in surface wettabilities toward water and oil, we classify the current oil-water separating materials into three categories: (i) superhydrophobic/superoleophilic materials, (ii) superoleophobic/superhydrophilic materials, and (iii) smart-response materials with switchable wettability. This review summarizes the representative research work for each of these materials, including their fabrication methods, principle and process of oil-water separation, and main characteristics and applications. Finally, existing problems, challenges, and future prospects of this fast-growing field of special wettability porous materials for the separation of oil-water mixtures are discussed.

Keyword :

Wettability Superoleophobicity Superhydrophobicity Oil-water separation Smart-response

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GB/T 7714 Li Wentao , Yong Jiale , Yang Qing et al. Oil-Water Separation Based on the Materials with Special Wettability [J]. | ACTA PHYSICO-CHIMICA SINICA , 2018 , 34 (5) : 456-475 .
MLA Li Wentao et al. "Oil-Water Separation Based on the Materials with Special Wettability" . | ACTA PHYSICO-CHIMICA SINICA 34 . 5 (2018) : 456-475 .
APA Li Wentao , Yong Jiale , Yang Qing , Chen Feng , Fang Yao , Hou Xun . Oil-Water Separation Based on the Materials with Special Wettability . | ACTA PHYSICO-CHIMICA SINICA , 2018 , 34 (5) , 456-475 .
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Reversible switch between underwater superaerophilicity and superaerophobicity on the superhydrophobic nanowire-haired mesh for controlling underwater bubble wettability EI SCIE Scopus
期刊论文 | 2018 , 8 (4) | AIP ADVANCES
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Abstract :

Controlling the underwater bubble wettability on a solid surface is of great research significance. In this letter, a simple method to achieve reversible switch between underwater superaerophilicity and underwater superaerophobicity on a superhydrophobic nanowire-haired mesh by alternately vacuumizing treatment in water and drying in air is reported. Such reversible switch endows the as-prepared mesh with many functional applications in controlling bubble's behavior on a solid substrate. The underwater superaerophilic mesh is able to absorb/capture bubbles in water, while the superaerophobic mesh has great anti-bubble ability. The reversible switch between underwater superaerophilicity and superaerophobicity can selectively allow bubbles to go through the resultant mesh; that is, bubbles can pass through the underwater superaerophilic mesh while are fully intercepted by the underwater superaerophobic mesh in a water medium. We believe these meshes will have important applications in removing or capturing underwater bubbles/gas. (C) 2018 Author(s).

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GB/T 7714 Shan, Chao , Yong, Jiale , Yang, Qing et al. Reversible switch between underwater superaerophilicity and superaerophobicity on the superhydrophobic nanowire-haired mesh for controlling underwater bubble wettability [J]. | AIP ADVANCES , 2018 , 8 (4) .
MLA Shan, Chao et al. "Reversible switch between underwater superaerophilicity and superaerophobicity on the superhydrophobic nanowire-haired mesh for controlling underwater bubble wettability" . | AIP ADVANCES 8 . 4 (2018) .
APA Shan, Chao , Yong, Jiale , Yang, Qing , Chen, Feng , Huo, Jinglan , Zhuang, Jian et al. Reversible switch between underwater superaerophilicity and superaerophobicity on the superhydrophobic nanowire-haired mesh for controlling underwater bubble wettability . | AIP ADVANCES , 2018 , 8 (4) .
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Green, Biodegradable, Underwater Superoleophobic Wood Sheet for Efficient Oil/Water Separation Scopus SCIE
期刊论文 | 2018 , 3 (2) , 1395-1402 | ACS Omega
WoS CC Cited Count: 6 SCOPUS Cited Count: 6
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Abstract :

© 2018 American Chemical Society.Superwettable (by water or oil) materials have been used in oil/water separation to cope with the growing oily industrial sewage discharge and oil spill accidents. The artificial superwetting materials for oil/water separation that have been previously reported are expensive, and using them usually causes secondary pollution, so practical, large-scale uses of those materials are limited. Here, we find that wood sheet shows underwater superoleophobicity and low oil adhesion in water, resulting from its strong capacity of absorbing water. A through-microhole array was created on the wood sheet surface by a simple mechanical drilling process. The prewetted porous sheet had great ability to separate the mixtures of water and oil with high separation efficiency. Wood is a low cost, green, and natural eco-friendly material; therefore, we believe that such a simple, low-cost, efficient, and green route of large-scale oil/water separation has great potential to practically solve the pollution problems caused by oil spill and oily industrial wastewater.

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GB/T 7714 Yong, Jiale , Chen, Feng , Huo, Jinglan et al. Green, Biodegradable, Underwater Superoleophobic Wood Sheet for Efficient Oil/Water Separation [J]. | ACS Omega , 2018 , 3 (2) : 1395-1402 .
MLA Yong, Jiale et al. "Green, Biodegradable, Underwater Superoleophobic Wood Sheet for Efficient Oil/Water Separation" . | ACS Omega 3 . 2 (2018) : 1395-1402 .
APA Yong, Jiale , Chen, Feng , Huo, Jinglan , Fang, Yao , Yang, Qing , Bian, Hao et al. Green, Biodegradable, Underwater Superoleophobic Wood Sheet for Efficient Oil/Water Separation . | ACS Omega , 2018 , 3 (2) , 1395-1402 .
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3D Multi-Microchannel Helical Mixer Fabricated by Femtosecond Laser inside Fused Silica EI SCIE Scopus PubMed
期刊论文 | 2018 , 9 (1) | MICROMACHINES
WoS CC Cited Count: 5 SCOPUS Cited Count: 4
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Abstract :

Three-dimensional (3D) multi-microchannel mixers can meet the requirements of different combinations according to actual needs. Rapid and simple creation of 3D multi-microchannel mixers in a lab-on-a-chip platform is a significant challenge in micromachining. In order to realize the complex mixing functions of microfluidic chips, we fabricated two kinds of complex structure micromixers for multiple substance mixes simultaneously, separately, and in proper order. The 3D multi-microchannel mixers are fabricated by femtosecond laser wet etch technology inside fused silica. The 3D multi-microchannel helical mixers have desirable uniformity and consistency, which will greatly expand their utility and scope of application.

Keyword :

femtosecond laser passive micromixer microstructure fabrication

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GB/T 7714 Shan, Chao , Chen, Feng , Yang, Qing et al. 3D Multi-Microchannel Helical Mixer Fabricated by Femtosecond Laser inside Fused Silica [J]. | MICROMACHINES , 2018 , 9 (1) .
MLA Shan, Chao et al. "3D Multi-Microchannel Helical Mixer Fabricated by Femtosecond Laser inside Fused Silica" . | MICROMACHINES 9 . 1 (2018) .
APA Shan, Chao , Chen, Feng , Yang, Qing , Jiang, Zhuangde , Hou, Xun . 3D Multi-Microchannel Helical Mixer Fabricated by Femtosecond Laser inside Fused Silica . | MICROMACHINES , 2018 , 9 (1) .
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