Single-layer graphene sound-emitting devices: experiments and modeling

Tian, He; Xie, Dan; Yang, Yi; Ren, Tian‐Ling; Wang, Yufeng; Zhou, Changjian; Peng, Pinggang; Wang, Ligang; Liu, Litian

doi:10.1039/c2nr11572g

Cited by 96 publications

(94 citation statements)

References 24 publications

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“…When sound waves impact on suspended monolayer graphene sheets (GSs), air molecules impacting could generate vibration in these light sheets. The resulting vibration could emit sound waves in the air to the back side of the sheets like a sound source [12,13].…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Suspended monolayer graphene traps high-speed single-walled carbon nanotube

Yang

Tong

2016

Carbon

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Section: A N U S C R I P Tmentioning

confidence: 99%

Suspended monolayer graphene traps high-speed single-walled carbon nanotube

Yang

Tong

2016

Carbon

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“…It was found that graphene has a significant flat frequency response in the wide ultrasound range ≈20–50 kHz. Additionally, graphene exhibits ultra‐small heat capacity per unit area (HCPUA), more efficiently converting joule heating to sound waves 94, 95, 96, 97, 98, 99, 100. It has been also reported that single‐layer graphene (SLG) presents the lowest HCPUA,101 demonstrating more efficient than other materials.…”

Section: The Human‐like Senses and Feedbacksmentioning

confidence: 99%

Human‐Like Sensing and Reflexes of Graphene‐Based Films

et al. 2016

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Humans have numerous senses, wherein vision, hearing, smell, taste, and touch are considered as the five conventionally acknowledged senses. Triggered by light, sound, or other physical stimulations, the sensory organs of human body are excited, leading to the transformation of the afferent energy into neural activity. Also converting other signals into electronical signals, graphene‐based film shows its inherent advantages in responding to the tiny stimulations. In this review, the human‐like senses and reflexes of graphene‐based films are presented. The review starts with the brief discussions about the preparation and optimization of graphene‐based film, as where as its new progress in synthesis method, transfer operation, film‐formation technologies and optimization techniques. Various human‐like senses of graphene‐based film and their recent advancements are then summarized, including light‐sensitive devices, acoustic devices, gas sensors, biomolecules and wearable devices. Similar to the reflex action of humans, graphene‐based film also exhibits reflex when under thermal radiation and light actuation. Finally, the current challenges associated with human‐like applications are discussed to help guide the future research on graphene films. At last, the future opportunities lie in the new applicable human‐like senses and the integration of multiple senses that can raise a revolution in bionic devices.

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“…There are also applications where graphene coating could be used on the surface to measure strain rate and identify the increase in stress level. It is also used in electrostatic audio transducer [3] and sound-emitting devices [4]. Similarly, a single-walled carbon nanotube (SWCNT) can be viewed as a graphene sheet that has been rolled into a tube.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics of bi-layered graphene sheet, double-walled carbon nanotube and nanotube bundle

Gajbhiye

Singh

2016

Appl. Phys. A

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Due to strong van der Waals (vdW) interactions, the graphene sheets and nanotubes stick to each other and form clusters of these corresponding nanostructures, viz. bi-layered graphene sheet (BLGS), double-walled carbon nanotube (DWCNT) and nanotube bundle (NB) or ropes. This research work is concerned with the study of nonlinear dynamics of BLGS, DWCNT and NB due to nonlinear interlayer vdW forces using multiscale atomistic finite element method. The energy between two adjacent carbon atoms is represented by the multibody interatomic Tersoff-Brenner potential, whereas the nonlinear interlayer vdW forces are represented by Lennard-Jones 6-12 potential function. The equivalent nonlinear material model of carbon-carbon bond is used to model it based on its force-deflection relation. Newmark's algorithm is used to solve the nonlinear matrix equation governing the motion of the BLGS, DWCNT and NB. An impulse and harmonic excitations are used to excite these nanostructures under cantilevered, bridged and clamped boundary conditions. The frequency responses of these nanostructures are computed, and the dominant resonant frequencies are identified. Along with the forced vibration of these structures, the eigenvalue extraction problem of armchair and zigzag NB is also considered. The natural frequencies and corresponding mode shapes are extracted for the different length and boundary conditions of the nanotube bundle.

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Single-layer graphene sound-emitting devices: experiments and modeling

Cited by 96 publications

References 24 publications

Suspended monolayer graphene traps high-speed single-walled carbon nanotube

Suspended monolayer graphene traps high-speed single-walled carbon nanotube

Human‐Like Sensing and Reflexes of Graphene‐Based Films

Nonlinear dynamics of bi-layered graphene sheet, double-walled carbon nanotube and nanotube bundle

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