Flexible and transparent graphene-based loudspeakers

Xu, Shicai; Man, Baoyuan; Jiang, Shouzhen; Chen, C. S.; Yang, Chunyu; Liu, M.; Gao, Xuan; Sun, Zhencui; Zhang, C.

doi:10.1063/1.4802079

Cited by 89 publications

(50 citation statements)

References 21 publications

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“…Because graphene is electrically conducting and has a low mass density, it is an ideal building material for small, efficient, high-quality broad-band audio speakers [42,43]. Xu et al fabricated graphene-based loudspeakers by transferring the graphene film on the PVDF piezoelectric film [44], demonstrating that the graphenebased loudspeaker could be a practical magnet-free loudspeaker by simply applying an audio frequency field through it. Compared with the commercial thin-film speakers, graphene-based film loudspeakers can generate sound with a wide frequency range, a high sound pressure level (SPL) and low total harmonic distortion (THD), and has much less power consumption [44].…”

Section: Transparent Loudspeakersmentioning

confidence: 99%

“…Xu et al fabricated graphene-based loudspeakers by transferring the graphene film on the PVDF piezoelectric film [44], demonstrating that the graphenebased loudspeaker could be a practical magnet-free loudspeaker by simply applying an audio frequency field through it. Compared with the commercial thin-film speakers, graphene-based film loudspeakers can generate sound with a wide frequency range, a high sound pressure level (SPL) and low total harmonic distortion (THD), and has much less power consumption [44]. Especially, it is transparent and superior to those made from commercial films such as aluminum-based films.…”

Section: Transparent Loudspeakersmentioning

confidence: 99%

“…5.9b. This kind of transparent and flexible film loudspeakers has wide potential applications, especially in transparent and flexible devices [44].…”

Section: Transparent Loudspeakersmentioning

confidence: 99%

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Application of Graphene-Based Transparent Conductors (TCs)

Zheng

Kim

2015

Graphene for Transparent Conductors

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As graphene has several potential advantages over indium tin oxide (ITO) including weight, robustness , flexibility, chemical stability, and cost, many applications, such as touch panels, displays, solar cells, organic light-emitting diode, transistors and other new areas, have been demonstrated [1]. Although the application of graphene for transparent conductors (TCs) is still in its early stage and the performances of some devices presented in this book are in a preoptimized state, the unique functional characteristics can make graphene a strong candidate to replace the currently commercially dominant TC materials [2]. These devices, with their functional, structural, and mechanical requirements, where graphene has been considered to apply are discussed in this chapter. Touch ScreenA touch screen is an electronic visual display that detects the presence and location of a touch [2]. A variety of touch-screen technologies, such as resistive, surface acoustic wave, capacitive, surface capacitance, projected capacitance, has been developed [3]. The most commonly used touch screens are the resistive and capacitive types, which require a sheet resistance of ~ 300-1500 Ω/sq at a transparency of ~ 86-90 % [4]. Graphene has several advantages including flexibility, wear resistance, chemical durability, and low toxicity (Fig. 5.1a-b) compared to the traditional ITO. Based on the successful fabrication of graphene films, with outstanding sheet resistance and transparency, and a large size of tens of centimeters, Bae et al.[5] incorporated them into touch-screen panel devices (Fig. 5.1b). It is revealed that the touch-screen display made from graphene outperformed that of ITO in terms of the applied strain. The former touch screen could handle twice as much strain as conventional ITO-based devices (Fig. 5.1c) [5]. The graphene-based panel resisted up to 6 % strain, which is limited mainly by the silver electrode and not by graphene itself, while the ITO-based touch panel easily broke at just 2-3 % strain.

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Section: Transparent Loudspeakersmentioning

confidence: 99%

Section: Transparent Loudspeakersmentioning

confidence: 99%

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Application of Graphene-Based Transparent Conductors (TCs)

Zheng

Kim

2015

Graphene for Transparent Conductors

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“…Then, the copper foil was annealed at 1050 ∘ C for 10 min with flowing H 2 of 15 sccm at 90 mtorr for improving the quality of graphene [15,16]. For graphene growth, the gas mixture of CH 4 and H 2 is then flowed at 460 mtorr with rates of 16 and 30 sccm for 30 min.…”

Section: Preparation Of Graphenementioning

confidence: 99%

RNA Detection Based on Graphene Field-Effect Transistor Biosensor

Tian

Zhang

et al. 2018

Advances in Condensed Matter Physics

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Graphene has attracted much attention in biosensing applications due to its unique properties. In this paper, the monolayer graphene was grown by chemical vapor deposition (CVD) method. Using the graphene as the electric channel, we have fabricated a graphene field-effect transistor (G-FET) biosensor that can be used for label-free detection of RNA. Compared with conventional method, the G-FET RNA biosensor can be run in low cost, be time-saving, and be miniaturized for RNA measurement. The sensors show high performance and achieve the RNA detection sensitivity as low as 0.1 fM, which is two orders of magnitude lower than the previously reports. Moreover, the G-FET biosensor can readily distinguish target RNA from noncomplementary RNA, showing high selectivity for RNA detection. The developed G-FET RNA biosensor with high sensitivity, fast analysis speed, and simple operation may provide a new feasible direction for RNA research and biosensing.

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“…8,9 For application in transparent and flexible electronic devices, necessary components such as electrodes, resistors, and memories should be both transparent and flexible with excellent electrical and mechanical properties. So far, most studies on optoelectronic components have focused on the fabrication and performance of flexible transparent electrodes.…”

Section: Introductionmentioning

confidence: 99%

Observation of convection phenomenon by high-performance transparent heater based on Pt-decorated Ni micromesh

Kim

et al. 2017

AIP Advances

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In this study, we report for the first time on the convection phenomenon for the consistent and sensitive detection of target materials (particulate matter (PM) or gases) with a high-performance transparent heater. The high-performance transparent heater, based on Pt-decorated Ni micromesh, was fabricated by a combination of transfer printing process and Pt sputtering. The resulting transparent heater exhibited excellent mechanical durability, adhesion with substrates, flexibility, and heat-generating performance. We monitored the changes in the PM concentration and temperature in an airtight chamber while operating the heater. The temperature in the chamber was increased slightly, and the PM2.5 concentration was increased by approximately 50 times relative to the initial state which PM is deposed in the chamber. We anticipate that our experimental findings will aid in the development and application of heaters for sensors and actuators as well as transparent electrodes and heating devices.

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Flexible and transparent graphene-based loudspeakers

Cited by 89 publications

References 21 publications

Application of Graphene-Based Transparent Conductors (TCs)

Application of Graphene-Based Transparent Conductors (TCs)

RNA Detection Based on Graphene Field-Effect Transistor Biosensor

Observation of convection phenomenon by high-performance transparent heater based on Pt-decorated Ni micromesh

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