Supercritical Fluid-Driven Polymer Phase Separation for Microlens with Tunable Dimension and Curvature

Yang, Youdi; Huang, Xiaopeng; Zhang, Xinyue; Jiang, Fuze; Zhang, Xiaogang; Wang, Yapei

doi:10.1021/acsami.6b01951

Cited by 20 publications

(12 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Underwater optical detection attracts enormous interests in ocean exploration and exploitation, endoscopic surgery, lab-on-chip devices, and many other bioscience applications (Dong et al, 2007 ; Barretto et al, 2009 ; Fei et al, 2011 ; Wu et al, 2015 ; Vespini et al, 2016 ). The MLA, as a crucial component for compact, integrated and miniaturized optical system, can be used for direct microimaging and data collection during underwater optical detection (Krupenkin et al, 2003 ; Li et al, 2016a , b ; Yang et al, 2016 ; Zhang et al, 2017 ). Various methods were presented to fabricate MLA (Chan and Crosby, 2006 ; Lee et al, 2012 ; Jiang et al, 2014 ; Wu et al, 2014 ; Zhang et al, 2014 ; Jung and Jeong, 2015 ; Yong et al, 2015a ).…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Underwater Superoleophobic Microlens Array With Remarkable Oil-Repellent and Self-Cleaning Ability

Bian

Liang

et al. 2020

Front. Chem.

View full text Add to dashboard Cite

Underwater superoleophobic microlens array (MLA) has been emerging as a crucial device for its wide applications in ocean optical imaging and sensing, endoscopic surgery, microfluidics and optofluidics, and other biomedical applications. Fabrication of microlens arrays integrated with excellent optical performance as well as underwater superoleophobicity remains a great challenge. In this paper, we report an underwater super oil-repellent MLA on a transparent optical glass substrate via femtosecond laser-induced phase and structural modification and chemical isotropic etching. The fabricated sample simultaneously possesses microlens structures with a smooth surface to enable optical imaging function, and grid-patterned biomimetic micro/nano hierarchical surface structures to produce underwater oil-resistance with a contact angle of 160.0 • and a sliding angle of 1.5 •. The resultant oil-repellent MLA exhibits underwater superoleophobicity and self-cleaning abilities in water. Meanwhile, it was demonstrated to have impressive imaging capability even after oil contamination. We believe that this novel resultant anti-oil MLA will be helpful for underwater detection and bioscience research, especially in oil polluted underwater workspaces.

show abstract

Section: Introductionmentioning

confidence: 99%

Bioinspired Underwater Superoleophobic Microlens Array With Remarkable Oil-Repellent and Self-Cleaning Ability

Bian

Liang

et al. 2020

Front. Chem.

View full text Add to dashboard Cite

show abstract

“…Also, microdomes of the cyanine dye complex can be formed during the dewetting process. [12] Alternatively, polymer phase separation [13] is used to fabricate polymethyl methacrylate domes separated from the PDMS slab. The thermal reflow process [14][15][16] has also been used for fabricating microdome arrays, especially in microlens applications.…”

Section: Introductionmentioning

confidence: 99%

Amalgamation‐Assisted Control of Profile of Liquid Metal for the Fabrication of Microfluidic Mixer and Wearable Pressure Sensor

Tang

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

The presence of microdomes can significantly increase the surface roughness, contact area, and deformability of materials, which have been adopted in many fields including microfluidics, wearable devices, and microanalysis systems. However, the shape of liquid metal (LM) droplet is defined by the density and surface energy, which has very limited room to tune. In this work, a simple, low‐cost method to effectively control the profile of LM using the masked amalgamation is presented. The LM amalgamates the masked copper surface to create the complex microdomes with various aspect ratios, sizes, profiles, and structures. The concave dome replicated from the LM mold has been demonstrated to enhance the microfluidic mixing performance. With a pattern transfer technique, the microconvex domes can be patterned on the surface of stretchable conductive composites to develop a flexible and sensitive pressure sensor. This sensor exhibits a fast response time, a wide working range, and an enhanced sensitivity for detecting small strains. As such, the fabricated microdomes exhibit a great potential to enable the fabrication of high‐performance sensors, microfluidic platforms, and micro total analysis systems.

show abstract

“…As a fundamental element of optofluidics, the microlens affords a wide range of applications in microfluidic engineering, such as cell counting, optical trapping, and fluidic lasing and sensing . Development of a tunable microlens has recently attracted considerable attention due to its unique potential applications . A macroscale analogue is the zoom lens in a commercial camera, in which the focal length of the lens group can be changed by displacing the lens components along the axis parallel to the lens arrangement to realize autofocusing functionality for taking photos at different depths of field.…”

Section: Introductionmentioning

confidence: 99%

All‐Glass 3D Optofluidic Microchip with Built‐in Tunable Microlens Fabricated by Femtosecond Laser‐Assisted Etching

Rao

et al. 2018

Advanced Optical Materials

View full text Add to dashboard Cite

Development of tunable microlenses by taking advantage of the physical adaptability of fluids is one of the challenges of optofluidic techniques, since it offers many applications in biochips, consumer electronics, and medical engineering. Current optofluidic tuning methods using electrowetting or pneumatic pressure typically suffer from high complexity involving external electromechanical actuating devices and limited tuning performance. In this paper, a novel and simple tuning method is proposed that changes the liquid refractive index in an optofluidic channel while leaving the shape of the microlens unchanged. To create an optofluidic microlens with high robustness and optical performance, built‐in microlenses are fabricated inside 3D glass microfluidic channels by optimized single‐operation wet etching assisted by a femtosecond laser. Tuning of focusing properties is demonstrated by filling the channel with media having different indices. Continuous tuning over a wide range (more than threefold tunability for both focal length and focal spot size) is also achieved by pumping sucrose solutions with different concentrations into the microchip channels. Reversible tuning is experimentally verified, indicating intriguing properties of the all‐glass optofluidic microchip. Both the proposed tuning method and the all‐glass architecture with built‐in microlens offer great potential toward numerous applications, including microfluidic adaptive imaging and biomedical sensing.

show abstract

Supercritical Fluid-Driven Polymer Phase Separation for Microlens with Tunable Dimension and Curvature

Cited by 20 publications

References 53 publications

Bioinspired Underwater Superoleophobic Microlens Array With Remarkable Oil-Repellent and Self-Cleaning Ability

Bioinspired Underwater Superoleophobic Microlens Array With Remarkable Oil-Repellent and Self-Cleaning Ability

Amalgamation‐Assisted Control of Profile of Liquid Metal for the Fabrication of Microfluidic Mixer and Wearable Pressure Sensor

All‐Glass 3D Optofluidic Microchip with Built‐in Tunable Microlens Fabricated by Femtosecond Laser‐Assisted Etching

Contact Info

Product

Resources

About