Microtip focused electrohydrodynamic jet printing with nanoscale resolution

Su, Shijie; Liang, Junsheng; Wang, Zizhu; Xin, Wenwen; Li, Xiaojian; Wang, Dazhi

doi:10.1039/d0nr08236h

Cited by 23 publications

(19 citation statements)

References 68 publications

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“…This model accurately predicted the effect of applied voltage on jet state, shown in Figure 4a [85]. Su et al showed the diameter of printed droplets decreased with the increase of applied pulse amplitudes, while increased with the increase of applied constant DC voltage [90]. Lee captured the jet state under different amplitude of pulsed voltage [91].…”

Section: Process Parametersmentioning

confidence: 70%

High Precision 3D Printing for Micro to Nano Scale Biomedical and Electronic Devices

et al. 2022

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Three dimensional printing (3DP), or additive manufacturing, is an exponentially growing process in the fabrication of various technologies with applications in sectors such as electronics, biomedical, pharmaceutical and tissue engineering. Micro and nano scale printing is encouraging the innovation of the aforementioned sectors, due to the ability to control design, material and chemical properties at a highly precise level, which is advantageous in creating a high surface area to volume ratio and altering the overall products’ mechanical and physical properties. In this review, micro/-nano printing technology,mainly related to lithography, inkjet and electrohydrodynamic (EHD) printing and their biomedical and electronic applications will be discussed. The current limitations to micro/-nano printing methods will be examined, covering the difficulty in achieving controlled structures at the miniscule micro and nano scale required for specific applications.

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Section: Process Parametersmentioning

confidence: 70%

High Precision 3D Printing for Micro to Nano Scale Biomedical and Electronic Devices

et al. 2022

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“…The relationship between the droplet diameter and the printing parameters in the pulse mode was studied in our previous work. [ 31 ] The diameter of the printed droplets increased with the enhancement of the pulse amplitude or decrease of the pulse frequency. [ 31 ] In this work, we had successfully fabricated various patterns of MLAs with diameters ranging from submicrometer to micrometer via MFEJ printing through tuning the printing parameters to demonstrate the fabrication possibilities and reproducibility of this technique.…”

Section: Resultsmentioning

confidence: 99%

“…[ 31 ] The diameter of the printed droplets increased with the enhancement of the pulse amplitude or decrease of the pulse frequency. [ 31 ] In this work, we had successfully fabricated various patterns of MLAs with diameters ranging from submicrometer to micrometer via MFEJ printing through tuning the printing parameters to demonstrate the fabrication possibilities and reproducibility of this technique. As shown in Figure a, MLAs with an average diameter of 4.12 ± 0.14 µm were generated on T3 substrate using an ink of NOA 61 UV‐curable polymer.…”

Section: Resultsmentioning

confidence: 99%

“…[28,29] To break through these limitations mentioned above, a newly microtip-focused electrohydrodynamic jet (MFEJ) printing was developed to fabricate high-resolution structures using different inks with a wide range of viscosities (8.4-3500 mPa s). [31] This technique uses a solid microtip with a radius of curvature (ROC) of several micrometers rather than fine microcapillary nozzles, which is very easy to prepare. The MFEJ printing can significantly enlarge the material applicability and effectively avoid nozzle clogging even with high-viscosity printing ink.…”

Section: Introductionmentioning

confidence: 99%

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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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“…In our previous research, we successfully proposed the nanotip-focused electrohydrodynamic jet (NFEJ) printing technique for maskless and direct micro/nanostructure manufacturing with high efficiency and resolution. , This NFEJ printing utilized a solid Ni nanotip rather than a fine microcapillary nozzle, which could extend the printability to different materials and effectively prevent nozzle blockage problems even with high-viscosity printing materials. This technique has also been applied to prepare micro/nanolens arrays (M/NLAs) on the surface of PDMS nanofilm-modified substrate .…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Artificial Compound Eyes with Wide Field-of-View and Antireflection Properties Prepared by Nanotip-Focused Electrohydrodynamic Jet Printing

Liang

et al. 2021

ACS Appl. Mater. Interfaces

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Artificial compound eyes (ACEs) endowed with durable superhydrophobicity, wide field-of-view (FOV), and antireflection properties are extremely appealing in advanced micro-optical systems. However, the simple and high-efficiency fabrication of ACEs with these functions is still a major challenge. Herein, inspired by moth eyes, ACEs with hierarchical macro/micro/nano structures were fabricated using the combination of nanotip-focused electrohydrodynamic jet (NFEJ) printing and air-assisted deformation processes. The NFEJ printing enables the direct and maskless fabrication of hierarchical micro/nanolens arrays (M/NLAs) without intermediate steps. The introduction of M/NLAs on the eye surface significantly improves the water hydrophobic performance with a water contact angle of 161.1° and contact angle hysteresis (CAH) of 4.2° and generally decreases the reflectance by 51% in the wavelength range of 350–1600 nm in comparison to the macroeye without any structures. The contact angle remains almost unchanged, and the CAH slightly increases from 4.2° to 8.7° after water jet impact for 20 min, indicating a durable superhydrophobicity. Moreover, the results confirm that the durable superhydrophobic ACEs with antireflection properties exhibit excellent imaging quality and a large FOV of up to 160° without distortion.

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Microtip focused electrohydrodynamic jet printing with nanoscale resolution

Abstract: Electrohydrodynamic jet (E-Jet) printing is a promising manufacturing technique for micro/nano-patterned structures with high-resolution, high-efficiency and high material compatibility. However, the further improvement of necking ratio of E-jet is still...

Cited by 23 publications

References 68 publications

High Precision 3D Printing for Micro to Nano Scale Biomedical and Electronic Devices

High Precision 3D Printing for Micro to Nano Scale Biomedical and Electronic Devices

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

Hierarchical Artificial Compound Eyes with Wide Field-of-View and Antireflection Properties Prepared by Nanotip-Focused Electrohydrodynamic Jet Printing

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