Facile fabrication of microlenses with controlled geometrical characteristics by inkjet printing on nanostructured surfaces prepared by combustion chemical vapour deposition

Alamán, Jorge; López-Villuendas, Ana María; López-Valdeolivas, María; Arroyo, M. P.; Andrés, Nieves; Sánchez‐Somolinos, Carlos

doi:10.1016/j.apsusc.2020.145422

Cited by 11 publications

(5 citation statements)

References 60 publications

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“…These monolayers allowed the tunability of surface free energy, which helped with tuning the microlens' aspect ratio [32]. In a similar work, a team of Spanish engineers demonstrated the controllability of the microlens geometry by surface modification using chemical vapor deposition [132]. Microdome size and shape can be changed by changing the surface coating as shown in figure 3(c-ii).…”

Section: Microlens Fabricationmentioning

confidence: 93%

Section: Materials Properties For Stable Jettingmentioning

confidence: 99%

“…(b) SEM images for a single droplet deposited on a CCVD-fluorosilane treated glass substrate with (i) 2, (ii) 4, and (iii) 8 flame passes and SEM image of an array of these microdomes printed using (iv) 2, (v) 4, and (vi) 8 flame passes. Reproduced with permission from[132]. Copyright 2020, Elsevier.…”

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confidence: 99%

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Additive manufacturing of micropatterned functional surfaces: a review

Chivate,

Zhou

2024

Int. J. Extrem. Manuf.

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Over the course of millions of years, nature has evolved to ensure survival and presents us with a myriad of functional surfaces and structures that can boast high efficiency, multifunctionality, and sustainability. What makes these surfaces particularly practical and effective is the intricate micropatterning that enables selective interactions with microstructures. Most of these structures have been realized in the laboratory environment using numerous fabrication techniques by tailoring specific surface properties. Of the available manufacturing methods, additive manufacturing (AM) has created opportunities for fabricating these structures as the complex architectures of the naturally occurring microstructures that far exceed the traditional ways. This paper presents a concise overview of the fundamentals of such patterned microstructured surfaces, their fabrication techniques, and diverse applications. A comprehensive evaluation of micro fabrication methods is conducted, delving into their respective strengths and limitations. Greater emphasis is placed on AM processes like inkjet printing and micro digital light projection printing due to the innate advantages of these processes to additively fabricate high resolution structures with high fidelity and precision. The paper explores the various advancements in these processes in relation to their use in microfabrication and also presents the recent trends in applications like the fabrication of microlens arrays, microneedles, and tissue scaffolds.

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Section: Microlens Fabricationmentioning

confidence: 93%

Section: Materials Properties For Stable Jettingmentioning

confidence: 99%

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Additive manufacturing of micropatterned functional surfaces: a review

Chivate,

Zhou

2024

Int. J. Extrem. Manuf.

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“…Alamán et al obtained a nanostructured layer on top of the substrate using the combustion chemical vapor deposition (CCVD) of a silane. [36] Afterwards, this layer is chemically coated with a fluorosilane by CVD, leading to a large range of contact angles of the ink drops. Overall, despite MLAs with high NA have been generated, the developed techniques involve complicated processing steps and extremely high manufacturing costs, which have seriously limited the large-scale application of MLAs.…”

Section: Introductionmentioning

confidence: 99%

Direct Microtip Focused Electrohydrodynamic Jet Printing of Tailored Microlens Arrays on PDMS Nanofilm‐Modified Substrate

Liang

et al. 2021

Adv Materials Technologies

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Microlens arrays (MLAs) have been widely employed as key components of various functional devices. However, the high‐efficiency fabrication of tailored MLAs with high numerical aperture (NA) is still a challenge. Herein, a one‐step maskless fabrication method of MLAs on polydimethylsiloxane (PDMS) nanofilm modified substrate via microtip focused electrohydrodynamic jet (MFEJ) printing is developed. The MFEJ printing can effectively avoid nozzle blockage even with highly viscous UV‐curable polymer. The contact angle (CA) of polymer can be controlled on different hydrophobic substrates, which are modified by treatment with PDMS, and MLAs with different NA can be realized. The polymer CA increases from 19° to 73° after surface modification, and the NA of MLAs correspondingly increases from 0.18 to 0.53. The MLAs diameter and focusing properties can be easily tuned by combining the printing parameters with PDMS nanofilm modification. Various patterns of MLAs with high NA are obtained by MFEJ printing. The projection experiment indicates the uniformity and excellent optical performance of the MLAs. Moreover, the fabricated MLAs can generate magnified virtual images with a magnification up to 1.72‐fold. Results show that the MFEJ printing can fabricate functional and tailored MLAs with high NA on the PDMS nanofilm‐modified substrate.

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“…Advanced optical applications based on dual-curing systems have also been reported [37]. Hybrid organic-inorganic materials obtained by a combination of curing and sol-gel process can also be categorized as dual-curing systems [38][39][40][41]. with an IPN or hybrid network structure can be obtained depending on the choice of reactions and monomers and the possibility of extensive covalent bonding between the two polymer networks.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of 3D-Printable Materials by Dual-Curing Procedures

et al. 2020

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Dual-curing thermosetting systems are recently being developed as an alternative to conventional curing systems due to their processing flexibility and the possibility of enhancing the properties of cured parts in single- or multi-stage processing scenarios. Most dual-curing systems currently employed in three-dimensional (3D) printing technologies are aimed at improving the quality and properties of the printed parts. However, further benefit can be obtained from control in the curing sequence, making it possible to obtain partially reacted 3D-printed parts with tailored structure and properties, and to complete the reaction by activation of a second polymerization reaction in a subsequent processing stage. This paves the way for a range of novel applications based on the controlled reactivity and functionality of this intermediate material and the final consolidation of the 3D-printed part after this second processing stage. In this review, different strategies and the latest developments based on the concept of dual-curing are analyzed, with a focus on the enhanced functionality and emerging applications of the processed materials.

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Facile fabrication of microlenses with controlled geometrical characteristics by inkjet printing on nanostructured surfaces prepared by combustion chemical vapour deposition

Cited by 11 publications

References 60 publications

Additive manufacturing of micropatterned functional surfaces: a review

Additive manufacturing of micropatterned functional surfaces: a review

Direct Microtip Focused Electrohydrodynamic Jet Printing of Tailored Microlens Arrays on PDMS Nanofilm‐Modified Substrate

Enhancement of 3D-Printable Materials by Dual-Curing Procedures

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