Highly Conductive Graphene Electronics by Inkjet Printing

Zhu, Dongbin; Zhuxian, Wang; Zhu, Dongming

doi:10.1007/s11664-019-07920-1

Cited by 24 publications

(15 citation statements)

References 141 publications

(141 reference statements)

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“…At present, many researchers have done a lot of research works on the preparation of inkjet printing inks and the printing of functional circuits [ 23 , 24 , 25 , 26 ]. However, they mainly focused on nanoparticles (silver nanoparticles, graphene) [ 27 , 28 ] or organic materials (solution-processed poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT: PSS), polyaniline) [ 29 ] as conductive fillers. Recently, the inkjet-printed non-spherical noble metal nanoparticles patterns useful for drug release were reported by Chirico and coworkers [ 30 , 31 ], which indicated that the inkjet printing technology has a wider range of applications.…”

Section: Introductionmentioning

confidence: 99%

Novel Insights into Inkjet Printed Silver Nanowires Flexible Transparent Conductive Films

Wang

et al. 2021

IJMS

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Silver nanowire (AgNWs) inks for inkjet printing were prepared and the effects of the solvent system, wetting agent, AgNWs suspension on the viscosity, surface tension, contact angle between ink droplet and poly(ethylene) terephthalate (PET) surface, and pH value of AgNWs ink were discussed. Further, AgNWs flexible transparent conductive films were fabricated by using inkjet printing process on the PET substrate, and the effects of the number printing layer, heat treatment temperature, drop frequency, and number of nozzle on the microstructures and photoelectric properties of AgNWs films were investigated in detail. The experimental results demonstrated that the 14-layer AgNWs printed film heated at 60 °C and 70 °C had an average sheet resistance of 13 Ω∙sq−1 and 23 Ω∙sq−1 and average transparency of 81.9% and 83.1%, respectively, and displayed good photoelectric performance when the inkjet printing parameters were set to the voltage of 20 V, number of nozzles of 16, drop frequency of 7000 Hz, droplet spacing of 15 μm, PET substrate temperatures of 40 °C and nozzles of 35 °C during printing, and heat treatment at 60 °C for 20 min. The accumulation and overflow of AgNWs at the edges of the linear pattern were observed, which resulted in a decrease in printing accuracy. We successfully printed the heart-shaped pattern and then demonstrated that it could work well. This showed that the well-defined pattern with good photoelectric properties can be obtained by using an inkjet printing process with silver nanowires ink as inkjet material.

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Section: Introductionmentioning

confidence: 99%

Novel Insights into Inkjet Printed Silver Nanowires Flexible Transparent Conductive Films

Wang

et al. 2021

IJMS

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“…Coalescence is an enticing phenomenon for study by the fluid dynamicist as it involves several of the major force contributions seen in the field namely capillary, viscous, inertial and gravity forces. The study of coalescing fluids has allowed for advances in microfluidics (Prakash & Gershenfeld 2007), additive manufacturing in microgravity (Huang et al 2020), bioprinting of living tissue (Murphy & Atala 2014), the inkjet printing of electronics (Zhu, Wang & Zhu 2020) and even the study of natural phenomena such as rain (D'Adderio, Porcù & Tokay 2018). Coalescence can largely be separated into drop-drop coalescence (Yuan et al 2015;Duchemin, Eggers & Josserand 2003;Gebauer et al 2016), bubble coalescence (Liu et al 2019;Cui et al 2016;Feng et al 2016;Han et al 2016), the study of onset (Neitzel & Dell'Aversana 2002;Geri et al 2017) and drop-planar coalescence (Politova et al 2017;Zhang et al 2019;Kirar et al 2020) which is the focus of this study.…”

Section: Introductionmentioning

confidence: 99%

“…The study of coalescing fluids has allowed for advances in microfluidics (Prakash & Gershenfeld 2007), additive manufacturing in microgravity (Huang et al. 2020), bioprinting of living tissue (Murphy & Atala 2014), the inkjet printing of electronics (Zhu, Wang & Zhu 2020) and even the study of natural phenomena such as rain (D'Adderio, Porcù & Tokay 2018). Coalescence can largely be separated into drop–drop coalescence (Yuan et al.…”

Section: Introductionmentioning

confidence: 99%

The dynamics of bouncing, partially coalescing, liquid metal droplets in a viscous medium

2021

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Planar partial coalescence is a phenomenon in which a droplet at a free surface or interface between two fluids coalesces into the plane surface producing a smaller droplet rather than coalescing completely. This smaller, ‘daughter’ droplet will be driven towards the interface by gravity and capillary forces resulting in a cascade effect of progressively small daughter droplets until the Ohnesorge Number approaches $\sim$ 1 and the cascade terminates with a full coalescence event. This paper utilizes a room temperature liquid metal alloy composed of gallium, indium and tin to study partial coalescence in a viscous quiescent medium and observed bouncing of the coalescing droplets on the interface. We observed the event using high speed videography measuring effects such as the droplet to daughter droplet ratio, droplet velocities, droplet bounce heights and coefficients of restitution for the bouncing event. An existing model (Honey & Kavehpour, Phys. Rev. E, vol. 73, 2006) from our group was used, validated and expanded upon to include buoyancy effects to estimate the initial velocity of the droplet and we developed two new models for the droplet travel and maximum bounce height. The first utilizes the Stokes model for drag to moderate success while the second utilizes a model from Beard & Pruppacher (J. Atmos. Sci., vol. 26, 1969, pp. 1066–1072) and a fourth-order Runge–Kutta numerical integration scheme to predict the droplet velocity and position as functions of time. Additionally the coefficient of restitution was determined from the model using a shooting method technique in tandem with measured data to find a coefficient of restitution value of $A = 0.27 \pm 0.06$ . This ‘bouncing drop’ phenomenon continues in a quiescent viscous fluid to the sub-micron scale and was facilitated by the material properties of the liquid metal including the high density, moderate viscosity and particularly high interfacial tension.

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“…With the emergence of modern printing electronic technology, the printing electronic industry based on nano-silver conductive ink is developing rapidly (Murtaza et al , 2020; Reenaers et al , 2020; Mo et al , 2016; Zhao et al , 2020). The application of nano-silver ink in the electronic industry mainly includes intaglio printing (Pudas et al , 2005; Sico et al , 2016; Huang and Zhu, 2018), flexographic printing (Kattumenu et al , 2009), screen printing (Wang et al , 2014; Faddoul et al , 2011), inkjet printing (Liu et al , 2019; Zhu et al , 2020; Huang et al , 2011; Li et al , 2014; Perelaer et al , 2009; Zhang et al , 2011; Woo et al , 2009) and three-dimensional (3 D) printing (Kim et al , 2006; Mu et al , 2018; Ghosale et al , 2016). In the gravure printing, flexographic printing and screen printing processes, the printed circuit board manufacturing process requires many steps.…”

Section: Research Background and Significancementioning

confidence: 99%

Preparation and application of water-based nano-silver conductive ink in paper-based 3D printing

Zhao

Wang

2021

RPJ

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Purpose In flexible electronics applications, organic inks are mostly used for inkjet printing. Three-dimensional (3 D) printing technology has the advantages of low cost, high speed and good precision in modern electronic printing. The purpose of this study is to solve the high cost of traditional printing and the pollution emissions of organic ink. It is necessary to develop a water-based conductive ink that is easily degradable and can be 3 D printed. A nano-silver ink printed circuit pattern with high precision, high conductivity and good mechanical properties is a promising strategy. Design/methodology/approach The researched nano-silver conductive ink is mainly composed of silver nanoparticles and resin. The effect of adding methyl cellulose on the ink was also explored. A simple 3 D circuit pattern was printed on photographic paper. The line width, line length, line thickness and conductivity of the printed circuit were tested. The influence of sintering temperature and sintering time on pattern resistivity was studied. The relationship between circuit pattern bending performance and electrical conductivity is analyzed. Findings The experimental results show that the ink has the characteristics of low silver content and good environmental protection effect. The printing feasibility of 3 D printing circuit patterns on paper substrates was confirmed. The best printing temperature is 160°C–180°C, and the best sintering time is 30 min. The circuit pattern can be folded 120°, and the cycle is folded more than 60 times. The minimum resistivity of the circuit pattern is 6.07 µΩ·cm. Methyl cellulose can control the viscosity of the ink. The mechanical properties of the pattern have been improved. The printing method of 3 D printing can significantly reduce the sintering time and temperature of the conductive ink. These findings may provide innovation for the flexible electronics industry and pave the way for alternatives to cost-effective solutions. Originality/value In this study, direct ink writing technology was used to print circuit patterns on paper substrates. This process is simple and convenient and can control the thickness of the ink layer. The ink material is nonpolluting to the environment. Nano-silver ink has suitable viscosity and pH value. It can meet the requirements of pneumatic 3 D printers. The method has the characteristics of simple process, fast forming, low cost and high environmental friendliness.

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Highly Conductive Graphene Electronics by Inkjet Printing

Cited by 24 publications

References 141 publications

Novel Insights into Inkjet Printed Silver Nanowires Flexible Transparent Conductive Films

Novel Insights into Inkjet Printed Silver Nanowires Flexible Transparent Conductive Films

The dynamics of bouncing, partially coalescing, liquid metal droplets in a viscous medium

Preparation and application of water-based nano-silver conductive ink in paper-based 3D printing

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