Inkjet Printing High‐Resolution, Large‐Area Graphene Patterns by Coffee‐Ring Lithography

Zhang, Lei; Liu, Hongtao; Zhao, Yan; Sun, Xiangnan; Wen, Yugeng; Guo, Yunlong; Gao, Xike; Di, Chong‐an; Yu, Gui; Liu, Yunqi

doi:10.1002/adma.201103620

Cited by 163 publications

(128 citation statements)

References 35 publications

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“…Optical fibre Inkjet printing. Inkjet printing is highly promising for the highthroughput deposition of micron-sized patterns by virtue of its speed, low cost, additive and direct writing capability 38 (Fig. 5a-d) without any chemical/physical modification.…”

Section: Production Of Ltmdsmentioning

confidence: 99%

High yield exfoliation of two-dimensional chalcogenides using sodium naphthalenide

et al. 2014

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Transition-metal dichalcogenides like molybdenum disulphide have attracted great interest as two-dimensional materials beyond graphene due to their unique electronic and optical properties. Solution-phase processes can be a viable method for producing printable singlelayer chalcogenides. Molybdenum disulphide can be exfoliated into monolayer flakes using organolithium reduction chemistry; unfortunately, the method is hampered by low yield, submicron flake size and long lithiation time. Here we report a high-yield exfoliation process using lithium, potassium and sodium naphthalenide where an intermediate ternary Li x MX n crystalline phase (X ¼ selenium, sulphur, and so on) is produced. Using a two-step expansion and intercalation method, we produce high-quality single-layer molybdenum disulphide sheets with unprecedentedly large flake size, that is up to 400 mm 2 . Single-layer dichalcogenide inks prepared by this method may be directly inkjet-printed on a wide range of substrates.

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Section: Production Of Ltmdsmentioning

confidence: 99%

High yield exfoliation of two-dimensional chalcogenides using sodium naphthalenide

et al. 2014

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“…6,7 Mineral rings left on washed glassware or sweat stained clothes are convenient examples of physical systems displaying such a behavior. Understanding the formation of the ring-like patterns from a colloidal droplet is important for many applications such as printing, [8][9][10] genotyping, 11 and colloidal self-assembly, 12,13 for which the distribution of the solute during drying process has to be put under control. Recently it was even demonstrated that the pattern formed by drying of biological fluids can be used as a means of disease diagnosis.…”

Section: Introductionmentioning

confidence: 99%

Ring formation from a drying sessile colloidal droplet

Zhang

Long-Guang

et al. 2013

AIP Advances

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Ring formation from drying sessile colloidal droplets (∼1.0 mm in size) containing microparticles of silicon or polystyrene was investigated with video microscopy. Results show that ring formation begins at the pinned contact line with the growth of an annular nucleus in a line by line way, which recedes inward albeit only slightly, followed by stacking of particles when the flow velocity becomes sufficiently large. The central height of the droplet decreases linearly with evaporation time, which implies that in the early stage, the number of particles arriving at contact line increases with time in a power law N∝t3/(1 + λ), where the parameter λ, according to Deegan's evaporation model, is related to the contact angle via $\lambda = \frac{{\pi - 2\theta _c }}{{2\pi - 2\theta _c }}$λ=π−2θc2π−2θc. Experimental values of λ agree well with model calculation for small contact angles, but are relatively smaller in the case of large contact angles. ‘Amorphization’ mechanism for the deposit at different stages of evaporation is discussed. Marangoni flow in a droplet on heated substrate introduces a desorption path for particles along the liquid surface, which can partially resolve the ring. Residual particles floating on the liquid surface may leave behind a homogeneous monolayer coating inside the dried spot. A “jump” in the droplet surface area at later stage of evaporation seems inevitably to cause a depletion zone of particles next to the ring. These results may be helpful for the development of strategies towards suppression of coffee ring effect and/or obtaining homogeneous coatings from drying colloidal suspension.

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“…Recent advances in direct patterning techniques have been reported for organic materials, functional polymers, and even tissue engineering [16]. range of a few tens of micrometers [17]. This is one trade-off between expensive and complex processes and ease of patterning.…”

Section: Review Of 3d Structuring Technologies At the Micro/nanoscalementioning

confidence: 99%

Hybrid 3D printing by bridging micro/nano processes

Yoon

Jang

Kim

et al. 2017

J. Micromech. Microeng.

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The aim of this work was to develop a novel hybrid manufacturing method for nanoscale three-dimensional (3D) printing with multi-material capabilities. 3D structuring methods at the micro/nanoscale are major goals of various engineering fields, and much work has been carried out to improve the minimum feature size, geometrical complexity, and material selection. With the aim of nanoscale multimaterial printing, a hybrid process was reported with an integrated nanoparticle deposition system (NPDS) and focused ion beam (FIB) system; however this process has limitations in terms of surface roughness and control over the layer thickness, as well as with the process scale, and furthermore, lack of sacrificial layers.In this dissertation, a novel hybrid process is described, which combines aerodynamically focused nanoparticle (AFN) printing, micro-machining and focused ion beam (FIB) milling. AFN printing is based on NPDS, and micromachining was used for local planarization. In addition to these processes, spincoating was used to fabricate sacrificial layers. By bridging these different II micro/nanoscale processes, the resulting hybrid process can address the limitations of the individual processes.To create the hybrid process, each process was investigated to enable compatibility. With the AFN printing system, the surface morphology of a detached substrate was observed, and the bonding mechanism between the substrate and nanoparticles was investigated. A novel printing strategy was identified to reduce the scale of the process. With the micro-machining system, different tool geometries were investigated. Complex geometries inspired by conventional-scale tools were implemented on the micro-scale, and their effects were investigated. With the FIB system, material re-deposition phenomena were investigated to reduce defects that occur during ion sputtering. A novel path-generation strategy was identified and investigated for different scanning paths.Process capability is discussed using fabrication examples and functional applications. The novel hybrid process represents a significant advance in the state of the art, and enables far improved process scales or dimensional degree of freedom, without losing the advantages of broad choice of materials.3D-pinted micro bi-material cantilevers were fabricated as a thermal actuator.The mechanical and thermal properties of the structure were investigated using an in-situ measurement system, and irregular thermal phenomena were analyzed. It is expected that these in-situ measurements of the 3D printed microstructure will contribute to materials research.Various 3D structures can be fabricated using the process described here from a range of metal/ceramic inorganic materials, including polymers. In particular, it is expected that the process will contribute to the area of customized nanoscale structuring, with potential applications in medical treatments. It is also expected that this work will contribute to further improvements in manufacturing technology by combining different m...

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Inkjet Printing High‐Resolution, Large‐Area Graphene Patterns by Coffee‐Ring Lithography

Abstract: Taking advantage of the "coffee-ring" effect, graphene electrodes with channel lengths as low as 1-2 micrometers are patterned by inkjet printing. Organic thin film transistors and complementary inverters are also fabricated using these graphene electrodes and show excellent performance.

Cited by 163 publications

References 35 publications

High yield exfoliation of two-dimensional chalcogenides using sodium naphthalenide

High yield exfoliation of two-dimensional chalcogenides using sodium naphthalenide

Ring formation from a drying sessile colloidal droplet

Hybrid 3D printing by bridging micro/nano processes

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