Nanoscale ear drum: Graphene based nanoscale sensors

Avdoshenko, Stanislav M.; Rocha, C. G.; Cuniberti, Gianaurelio

doi:10.1039/c2nr30097d

Cited by 20 publications

(22 citation statements)

References 36 publications

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“…31,[33][34][35][36][37] Fig. 7 shows the transmission spectra with a 20 nm-thick sensing medium on graphene lms and corresponding sensitivity calculated (dened as the ratio of the shi of resonant wavelength dl 0 to the change of RI of the sensing medium dn 1 , dl 0 /dn 1 ), with or without buffer layer.…”

Section: Resultsmentioning

confidence: 99%

High Q-factor plasmonic resonators in continuous graphene excited by insulator-covered silicon gratings

et al. 2014

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We propose a structure to excite plasmons in large-area continuous graphene films with insulator-covered sub-wavelength silicon gratings (ICSWSG). By numerical simulations we have demonstrated that, after adding a low-permittivity insulator underneath graphene, the graphene/gratings hybrid structure has a high Q-factor ($66) and a sharp notch (with the full width at half maximum of $122 nm) in the transmission spectra at mid-infrared resonant wavelength. Furthermore, the plasmonic properties, e.g.the resonant wavelength, magnitude and Q-factor, can be tuned over a wide range via structure modulation and/or gating of graphene. The transmission dip is achieved over a wide angle range. Finally we demonstrate that such highly confined graphene plasmons could also be excited in graphene sandwiched between silicon gratings and a SiO 2 substrate.

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Section: Resultsmentioning

confidence: 99%

High Q-factor plasmonic resonators in continuous graphene excited by insulator-covered silicon gratings

et al. 2014

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“…Thickness, roughness, deformation, surface morphology and deflection distances of NMM (with and without the load material), and the mass, roughness, surface morphology and emission intensity of the attached QD material were important parameters for the performance optimization in various applications such as photovoltaic devices, sensors, and NMM based novel acoustic sensors [1][2][3][4][5][6][7][8][9][10][11][12][13]32] as proposed in this article. Microscopy images of the prepared NMMs are shown in Figure 2, where Figures 2a-c and 2d-f belonged to the atomic force and optical microscopy images, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Nanomechanical membranes (NMMs) are important with their impressive precision and sensitivity for the applications in engineering and science, such as; mass, gas, stress, acoustic or viscosity detecting systems, impermeable barrier layer, water purification or memory [1][2][3][4][5][6][7][8][9][10][11]. In addition, NMMs have great potential to be used in novel nanoengineering systems such as; vibrating Förster resonance energy transfer (VFRET) based point-of-care (PoC) device systems or acousto-optic transducer systems [6,[12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Freely-Suspended Graphene Nanomechanical Membrane Devices with Quantum Dots for Point-of-Care Applications

2020

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We demonstrate freely suspended graphene-based nanomechanical membranes (NMMs) as acoustic sensors in the audible frequency range. Simple and low-cost procedures are used to fabricate NMMs with various thicknesses based on graphene layers grown by graphite exfoliation and solution processed graphene oxide. In addition, NMMs are grafted with quantum dots (QDs) for characterizing mass sensitive vibrational properties. Thickness, roughness, deformation, deflection and emissions of NMMs with attached QDs are experimented and analyzed by utilizing atomic force microscopy, Raman spectroscopy, laser induced deflection analyzer and spectrophotometers. Förster resonance energy transfer (FRET) is experimentally achieved between the QDs attached on NMMs and nearby glass surfaces for illustrating acousto-optic utilization in future experimental implementations combining vibrational properties of NMMs with optical emission properties of QDs. This property denoted as vibrating FRET (VFRET) is previously introduced in theoretical studies while important experimental steps are for the first time achieved in this study for future VFRET implementations. The proposed modeling and experimental methodology are promising for future novel applications such as NMM based biosensing, photonics and VFRET based point-of-care (PoC) devices.

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“…These implies that the eigenfrequency of a graphene sheet can be very high [4]. These excellent properties of a graphene sheet have already been used in sensors [5][6][7]. In addition, graphene sheets have the potential to be used as actuators.…”

Section: Introductionmentioning

confidence: 99%

Desorption Process of an Atom from a Vibrating Graphene Surface

Inui

2018

e-J. Surf. Sci. Nanotech.

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We theoretically investigate the desorption process of an argon atom from a vibrating nanographene sheet. A high eigenfrequency of a graphene membrane owing to a small mass density per area and a large Young's modulus of graphene enable increasing the velocity of an atom enough to escape from the attractive interaction between the atom and graphene in a short time by accelerating the graphene sheet. We present the dependence of the velocity of ejected atom on the frequency and amplitude of the graphene membrane and consider an application to heating gas in small cavity.

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Nanoscale ear drum: Graphene based nanoscale sensors

Abstract: The difficulty in determining the mass of a sample increases as its size diminishes. At

Cited by 20 publications

References 36 publications

High Q-factor plasmonic resonators in continuous graphene excited by insulator-covered silicon gratings

High Q-factor plasmonic resonators in continuous graphene excited by insulator-covered silicon gratings

Preparation and Characterization of Freely-Suspended Graphene Nanomechanical Membrane Devices with Quantum Dots for Point-of-Care Applications

Desorption Process of an Atom from a Vibrating Graphene Surface

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