Direct Electrohydrodynamic Patterning of High-Performance All Metal Oxide Thin-Film Electronics

Liang, You; Yong, Jason; Yu, Yang; Nirmalathas, Ampalavanapillai; Ganesan, Kumaravelu; Evans, Robin J.; Nasr, Babak; Skafidas, Efstratios

doi:10.1021/acsnano.9b05715

Cited by 36 publications

(33 citation statements)

References 37 publications

(53 reference statements)

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“…Accordingly, it would be better to use highly standardized, reproducible, and thermally stable oxide particles that can be dispersed and mixed in a uniform manner. Because the uniform mixing of two different dry oxide NPs is challenging, the intimate mixing of two different oxide NPs in a slurry state and subsequent deposition of slurry onto microelectrodes via microdispensing, ink-jet printing, [347][348][349][350][351] and direct electrohydrodynamic (EHD) patterning [352][353][354][355][356] can be considered for fabricating sensing film in a reproducible manner.…”

Section: Oxide-oxide Heterocompositesmentioning

confidence: 99%

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

2020

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With rapid progress in device integration and computing power, the realization of highly miniaturized one-chip artificial olfaction with superior performance is close and should be further supported by the rational design of chemical sensors and chemical sensing materials. The number of gas sensors tends to increase in order to sniff more complex odors with the progress of civilization. This explains the evolution from a single chemical sensor to complicated artificial olfaction using sensor arrays. At the advent of oxide chemiresistive gas sensors in the 1960s and 1970s, a single gas sensor was widely used to detect toxic, explosive, dangerous, and harmful gases, such as CO, C 3 H 8 , CH 4 , H 2 S, and NO 2 , in a selective manner. [26,27] However, a single sensor is often insufficient for recognizing most of the natural odors encountered in daily life, which consist of hundreds to thousands of different chemicals. [28] In the mammalian olfactory system, odorants are initially detected by olfactory receptors (ORs) covering the surface of the cilia projected from olfactory sensory neurons (OSNs), which are located in the olfactory epithelium lining the nasal cavity. These signals are transmitted to the glomeruli in the olfactory bulb, where a high degree of signal integration happens (Figure 1a). [29] Finally, the signals are sent through mitral cells to a higher brain region (olfactory cortex), and the signals are subsequently combined or modified in a variety of ways by parallel processing for analysis and interpretation (Figure 1b). [30] Each OR can detect various kinds of odorants, and similarly, each odorant can also be recognized by a number of ORs. That is, the olfactory system determines multiple odorants from various combinations of ORs (Figure 1c). [31] For better olfaction, both OSNs and ORs should be abundant. A larger number of OSNs is advantageous for detecting trace concentrations of analytes and ligands. [32] For instance, dogs with more OSNs are better than humans at detecting explosives, searching and rescuing, diagnosing disease, and assessing agricultural products. [33] If a mammal can detect larger numbers of faint gas components within odors, he can perceive and identify the odors more accurately. From this perspective, gas sensors with lower detection limits would be assembled to the stronger artificial olfaction. Kinds of ORs are also important. Mammals are known to have ≈1000 different kinds of ORs, and combinations of dissimilar ORs enable the discrimination of a myriad of odorants. [29] To mimic this, sensor arrays consisting of small number (5-20) of sensors that show Artificial olfaction based on gas sensor arrays aims to substitute for, support, and surpass human olfaction. Like mammalian olfaction, a larger number of sensors and more signal processing are crucial for strengthening artificial olfaction. Due to rapid progress in computing capabilities and machinelearning algorithms, on-demand high-performance artificial olfaction that can eclipse human olfaction becomes inevitable onc...

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Section: Oxide-oxide Heterocompositesmentioning

confidence: 99%

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

2020

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“…[ 71–73 ] Traditionally, various printing techniques have been developed and are widely used for solution‐based material distribution and patterning, such as inkjet printing, direct jetting, and lithography. [ 74,75 ] Recently, the rapid development of a high‐performance device has put forward higher demand for functional material patterning in pattern density, resolution, precision, as well as efficiency. Several challenges remain elusive for current material patterning methods, such as how to accurately dispense the materials into preset locations, how to maintain the uniformity between different fabrication cycles, how to achieve sharp pattern edges in microscale, and how to obtain high‐resolution patterns and/or keep a narrow gap between adjacent patterns.…”

Section: Applicationsmentioning

confidence: 99%

Heterogeneous Wettability Surfaces: Principle, Construction, and Applications

Liu

Zhao

et al. 2020

Small Structures

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Surface wettability plays a vital role in liquid-solid-gas systems and has elicited increasing research interest in numerous fields, including self-cleaning, optics and electronics, sensing and detection, heat management, and microfluidics. [1-5] For example, superhydrophobic surfaces, such as the lotus leaf, show minimized adhesion force to water. Water droplets can freely roll off this type of surface and remove dust, granting the surface with a self-cleaning property. [6,7] By comparison, a water drop placed on a hydrophilic surface forms a liquid puddle, with the solutes in the liquid finally deposited on the surface after drying. This is the fundamental mechanism for various printing and lithography techniques for material deposition. [8-10] However, these uniform surfaces fail to meet the rigorous requirements in complex conditions, such as high-resolution functional material patterning and enrichment for parallel detection. Alternatively, heterogeneous wettability substrates with rationally designed water-repellent and water-loving properties can be utilized to satisfy these fastidious requirements. Different regions on such surfaces have distinct wettability, thus exhibiting excellent capability in precisely regulating the solid-liquid interactions. A representative example is the splendid water manipulation of the desert beetle, Stenocara, using the heterogeneous wettability strategy to collect and transport water for survival in the Namib Desert, which is one of the driest places in the world. The hydrophilic bumps distributed on the hydrophobic back of the beetle can capture fog in the moist morning and condensate it into large water droplets. Then, the hydrophobic region serves as a pathway to guide the water droplets rolling to its mouth. [11] This idea has greatly inspired the design and utilization of heterogeneous wettability for various applications. Generally, the terms "hydrophilic" and "hydrophobic" are used to describe the state of a solid surface when contacting with water. If the water droplet contact angle is larger than 90 , the surface is hydrophobic; otherwise the surface is hydrophilic. However, when relating to dynamic liquid manipulation on solid surfaces, the key factor is the solid-liquid adhesion force instead of the hydrophilicity/hydrophobicity. For example, when a water droplet impacts on a hydrophobic and high-adhesive surface equipped with a hydrophilic and low-adhesive stripe, it can be split into two subdrops, which is direct evidence for the solid-liquid adhesion force dominating the liquid's dynamic behavior. [12] Although in many cases, the solid-liquid adhesion force decreases with enhancement of hydrophobicity, for example, the adhesion force on a superhydrophobic surface is much smaller than that on a hydrophilic surface, there exist exceptions, such as a hydrophilic surface having a smaller adhesion force than a hydrophobic surface. [13] Therefore, in these cases the heterogeneous wettability mainly indicates the nonuniformity in the adhesion force. Levkin and cowork...

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“…Numerous other EHD jet-printed electrode materials have been presented in the literature. 40,51,53,90,[94][95][96][97][98][99][100][101][102]…”

Section: Materials Advances Accepted Manuscriptmentioning

confidence: 99%

“…118 as the high-k gate dielectric. 40 The channel length of the metal oxide semiconductor layer was 7 μm. The all-printed TFTs had excellent electrical characteristics at a low operating voltage of 2 V, with an average electron μ FET = 117 cm 2 V -1 s -1 and an I on /I off = > 10 6 .…”

Section: Materials Advances Accepted Manuscriptmentioning

confidence: 99%

Overview of recent progress in electrohydrodynamic jet printing in practical printed electronics: focus on the variety of printable materials for each component

et al. 2021

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Direct Electrohydrodynamic Patterning of High-Performance All Metal Oxide Thin-Film Electronics

Cited by 36 publications

References 37 publications

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

Heterogeneous Wettability Surfaces: Principle, Construction, and Applications

Overview of recent progress in electrohydrodynamic jet printing in practical printed electronics: focus on the variety of printable materials for each component

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