Sustainable production of highly conductive multilayer graphene ink for wireless connectivity and IoT applications

Pan, Kewen; Fan, Yangyang; Leng, Ting; Li, Jiashen; Xin, Zhiying; Zhang, Jiaye; Líu, Hao; Gallop, John; Novoselov, Konstantin; Hu, Zhirun

doi:10.1038/s41467-018-07632-w

Cited by 255 publications

(198 citation statements)

References 56 publications

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“…Graphene is extremely sensitive to the environment, so this extends the sensor application for analyses [19]. Graphene-based paints include antistatic, conductive ink [20], electromagnetic-interference Year shielding [21], and gas barrier [22]. Because the production technology of graphene is simple and reasonably developed, and the development of chemical derivatives of graphene to control the product's optical opacity and conductivity would be conducted, graphene is so attractive for researchers and companies.…”

Section: Preparation Of Graphenementioning

confidence: 99%

Review on the recent progress in the preparation and stability of graphene-based nanofluids

Mahian

Wongwises

et al. 2020

J Therm Anal Calorim

110

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Graphene has attracted much attention from the science world because of its mechanical, thermal, and physical properties. Graphene nanofluid is well known for its easy synthesis, longer suspension stability, higher heat conductivity, lower erosion, corrosion, larger surface area/volume ratio, and lower demand for pumping power. This article is an audit of experimental outcome about the preparation and stability of graphene-based nanofluids. Numerous researches to prepare and stabilize graphene-based nanofluids have been developed, and it is indispensable to create a complete list of the approaches. This research work outlines the advancement on preparation and assessment methods and the techniques to enhance the stability of graphene nanofluids and outlook prospects.

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Section: Preparation Of Graphenementioning

confidence: 99%

Review on the recent progress in the preparation and stability of graphene-based nanofluids

Mahian

Wongwises

et al. 2020

J Therm Anal Calorim

110

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“…The reading distances of graphene/AgNW‐based and pure AgNW‐based RFID tags were tested as a major reference factor. As one of the important parameters of RFID tags, the maximum activation range R max can be expressed as17,39

R_{max} = (λ / 4 π) \sqrt{P_{tr} G_{read} G_{tag} τ / P_{th}}

where λ is the carrier frequency wavelength; the product of P tr G read is determined by the reader, where P tr and G read are the power transmitted by the reader and the gain of the reader antenna, respectively; G tag is the gain of the tag antenna; P th is the minimum threshold power to activate the tag chip; and τ is the transmission coefficient, which represents the matching level between the tag chip and the antenna. When the impedance of the antenna is equal to the complex conjugate of the impedance of the tag chip, maximum power transfer occurs, and τ = 1.…”

Section: Resultsmentioning

confidence: 99%

Utilization of Synergistic Effect of Dimension‐Differentiated Hierarchical Nanomaterials for Transparent and Flexible Wireless Communicational Elements

Sun

Liu

Qiu

et al. 2020

Adv Materials Technologies

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as an essential part of the IoT network has attracted much attention in many areas such as wearable applications. Fully optical transparency becomes one of the necessities for these devices, e.g., a recent study reported an under-screen transparent antenna array, which was utilized in the assembly of next-generation cellphones. [1] The real-time noninterruptive transparent and flexible wireless communicational devices are needed in a wide range of scenarios. For example, transparency is in exact need in applications such as smart contact lenses for not blocking the user's vision while enabling the noninvasive method for continuous medical diagnosis. [2,3] Furthermore, on top of transparency, flexibility is also a very important ingredient, especially for wearable devices. Excellent flexibility of such wireless electronics is also necessary in order to closely match the curvature of the eyeballs, reducing the discomfort of patients. [4] To fabricate transparent and flexible wireless devices, the main challenge remains the realization of transparent and flexible antenna. Therefore, the demand of transparent and flexible antenna has been rapidly growing in recent years.The demand of emerging transparent and flexible wireless electronic devices is ever-increasing for Internet of Things (IoT) scenarios, like noninvasive healthcare, real-time wearable electronics, etc. However, as an essential part of the IoT wireless communicational devices, radio frequency (RF) antennas are still hampered by poor-flexibility, low-conductivity, and weaktransparency. Here, based on the unique electronic and optical properties of graphene, a method to obtain these appealing features concurrently through promoting synergistic effect between two-dimensional (2D) and one-dimensional (1D) materials is studied. It is found that this method could not only successfully maintain transparency and flexibility, but also greatly enhance the overall performance of the antenna. The fabricated antenna exhibits a 75% light transmittance, from 5.6 to 12.8 GHz ultrawide bandwidth and outstanding durability and stability. Moreover, a transparent and flexible radio frequency identification (RFID) tag is also designed and demonstrated with a remarkable reading distance. These findings show that the method by promoting synergistic effect of hybrid materials has great potential in the design of next generation novel and high-performance wireless electronics.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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“…However, the adhesive material could affect the electrical properties of graphene. An alternative strategy is reported in Ref [37] by using cyrene and cellulose acetate butyrate (CAB). Similarly to sonication methods [12], we observed small size layers but non-folded edges.…”

Section: Resultsmentioning

confidence: 99%

Zeolite-Assisted Shear Exfoliation of Graphite into Few-Layer Graphene

et al. 2019

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A novel method is presented to prepare few-layer graphene (FLG) in N-methyl-2-pyrrolidinone (NMP) by using a simple, low-cost and energy-effective shear exfoliation assisted by zeolite and using a cappuccino mixer to produce shear. We propose that the exfoliation of natural graphite flakes can be achieved using inelastic collisions between graphite flakes and zeolite particles in a dynamic colloidal fluid. To confirm the exfoliation of FLG, spectroscopy and morphological studies are carried out using Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Additionally, the obtained graphene shows a linear flow of current and low resistance. The proposed method shows great promise for the industrial-scale synthesis of high-quality graphene with potential applications in future graphene-based devices, and furthermore, this method can be extended to exfoliate inorganic layered materials such as BN and MoS 2 .

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Sustainable production of highly conductive multilayer graphene ink for wireless connectivity and IoT applications

Cited by 255 publications

References 56 publications

Review on the recent progress in the preparation and stability of graphene-based nanofluids

Review on the recent progress in the preparation and stability of graphene-based nanofluids

Utilization of Synergistic Effect of Dimension‐Differentiated Hierarchical Nanomaterials for Transparent and Flexible Wireless Communicational Elements

Zeolite-Assisted Shear Exfoliation of Graphite into Few-Layer Graphene

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