Actuation of a suspended nano-graphene sheet by impact with an argon cluster

Graduate School of Engineering, University of Hyogo, 2167, Shosha, Himeji, Hyogo 671-2280, Japan.
Nanotechnology (Impact Factor: 3.82). 12/2008; 19(50):505501. DOI: 10.1088/0957-4484/19/50/505501
Source: PubMed

ABSTRACT Using a molecular dynamics simulation, we examine the actuation of nanodrums consisting of a single graphene sheet. The membrane of the nanodrum, which contains 190 carbon atoms, is bent by collision with a cluster consisting of 10 argon atoms. The choice of an appropriate cluster velocity enables nanometre deformation of the membrane in sub-picosecond time without rupturing the graphene sheet. Theoretical results predict that, if an adsorbed molecule exists on the graphene sheet, the quick deformation due to the impact with the cluster can break the weak bonding between the adsorbed molecule and the graphene sheet and release the molecule from the surface; this suggests that this system has attractive potential applications for purposes of molecular ejection.

52 Reads
  • Source
    • "Recently, the mechanical properties of GSs have been a topic of considerable interest [14] [15] [16] [17] [18] [19] [20] [21] [22] [23]. In general, three approaches have been developed to study the mechanical properties of GSs: by experiment [14] [15]; using molecular dynamic (MD) methods [16– 19]; and by continuum mechanics [20] [21] [22] [23]. "
    [Show abstract] [Hide abstract]
    ABSTRACT: In this work, wave propagation characteristics of double-layer graphene sheets (DLGSs) is investigated using nonlocal Mindlin–Reissner plate theory. The vibrational modes are divided into in-phase mode and anti-phase mode, which is a special feature of DLGSs. The wave propagation behaviors in DLGSs in the in-phase mode and anti-phase mode are different. Cutoff frequency and escape frequency are analyzed in this study. In particular, the escape frequencies with different nonlocal parameters are less than that obtained from nonlocal Timoshenko beam theory and different between the in-phase mode and anti-phase mode. This is because shear forces consider the nonlocal effects in nonlocal Mindlin–Reissner plate theory, but do not consider the nonlocal effects in nonlocal Timoshenko beam theory. Thus, the present work will provide a better representation of wave propagation in DLGSs and will have implications in their application as electromechanical oscillators.
    International Journal of Mechanical Sciences 07/2014; 84. DOI:10.1016/j.ijmecsci.2014.04.008 · 2.03 Impact Factor
  • Source
    • "The vibrations displayed an appreciable anharmonicity, as derived from the comparison between kinetic and potential energies, as well as between vibration energy for hydrogen and deuterium. Inui et al. (2008) used MD to simulate a nanodrum consisting of a SLGS which was actuated by the impact of a cluster of Ar atoms. Atalaya et al. (2008) derived a nonlinear continuumbased model of SLGS based on a valence force-field model for interaction potential between carbon atoms and used this model to study vibrations of suspended SLGS. "
    [Show abstract] [Hide abstract]
    ABSTRACT: A pseudo beam model with 3-node beam element is proposed to simulate the modal behavior of the wrinkled single-layered graphene sheets (SLGS) based on molecular structural mechanics (MSM) method. The wrinkling characteristics are simulated using a direct perturbed-force technique originated from the continuum theory. The primary bifurcation and the secondary wrinkling behaviors are investigated so as to obtain the characteristics of the formation and the evolution of the wrinkles. The wrinkled shape, stress and effective mass are introduced into the modal model using the updated geometry technique. The effects of the wrinkles on the vibration characteristics of the SLGS are then interpreted by comparing with the unwrinkled case. The effects of the aspect ratio on the modal behavior of wrinkled SLGS are further studied. Based on the MSM simulation results and the continuum thin plate model, a prediction model is proposed to obtain the natural frequency of wrinkled SLGS. The predictions agree well with the MSM simulations. The results and observations are good references to design a wrinkled highly frequency nano-devices.
    International Journal of Solids and Structures 05/2013; 50(10):1812–1823. DOI:10.1016/j.ijsolstr.2013.02.002 · 2.21 Impact Factor
  • Source
    • "ν 0 = h 4r π 3 E 2D 3m 0 (1 − s 2 ) ≃ 430GHz . (2) More adequate molecular dynamics simulations (MDS) for monolayer graphene reveal ν 0 = 400 GHz for a smaller area (4.3 nm 2 ) exhibiting 75 % deviation from eq. 2 [23] "
    [Show abstract] [Hide abstract]
    ABSTRACT: The truly two-dimensional material graphene is an ideal candidate for nanoelectromechanics due to its large strength and high electron mobility. Here, we show that a monolayer of graphene on SiO2 provides natural, ultra-small membranes of diameters down to 3,m within its intrinsic rippling. These membranes can be lifted either reversibly or hysteretically by the tip of a scanning tunneling microscope (STM). The clamped-membrane model including van-der-Waals and dielectric forces explains the results quantitatively. Application of an AC-voltage oscillates the nanomembrane, which might lead to a completely novel approach to controlled quantized oscillations or single atom mass detection.
Show more