Vibration Characteristics of Graphene nano resonator as mass sensor

Abstract

The decrease in the physical dimensions of the devices have sought the attention of research community due to quick response, high sensitivity and sturdiness of the devices. These devices in the form of nano resonators have been extensively used as sensors to detect the entity at submicron level as well as to identify the properties of matter at submicron level. With the process like chemical vapour deposition, lithography technique as well as mechanical exfoliation techniques, it has become possible to produce materials which are 2D in nature. The excellent mechanical and electrical properties of graphene as well as its complete plain geometry advocate it as an ideal material for the development of sensors used for identifying the object at nano level. Here an attempt is made to analyse the vibration characterization of graphene resonator in the form of membrane to understand the shift in the frequency by adsorbing the mass and change in the temperature. The tobacco mosaic virus is considered as a mass adsorbed onto the graphene nano ribbon based membrane. Along with the adsorption of the mass, the effect of variation in temperature is also introduced to observe the shift in the natural frequency of the graphene membrane based resonator.

Research progress of electromechanical graphene resonant sensors

“…的质量和位置. 2012年, 韩国延世大学的Dai等 [79] 、 美国波士顿大学的Jiang等 [80] 分别利用连续介质 2011年, 加拿大曼尼托巴大学的Arash等 [81] 使用分子动力学仿真研究了5种不同的惰性气体 图 4 石墨烯谐振式质量传感器及其性能表征 (a) 查尔姆斯理工大学设计的石墨烯谐振式质量传感器 [78] ; (b) 韩国世明大学设 计的石墨烯谐振式质量传感器 [83] ; (c) 石墨烯谐振式质量传感器在不同边界条件下的灵敏度 [84] ; (d) 单层和多层石墨烯的谐振 频率-质量变化曲线 [85] ; (e) 单层和多层石墨烯的谐振频移-质量变化曲线 [85] ; (f) 谐振频率和频移与质量的关系曲线, 蓝色曲线表 示谐振频率随石墨烯层数的变化, 红色曲线表示频移随石墨烯层数的变化 [86] Fig. 4.…”

“…4. Graphene resonant mass sensor and its performance characterization: (a) Graphene resonant mass sensor designed by Chalmers University of Technology [78] ; (b) graphene resonant mass sensor designed by Semyung University [83] ; (c) sensitivity of graphene resonant mass sensor under different boundary conditions [84] ; (d) resonant frequency mass variation curve of monolayer/multilayer graphene films [85] ; (e) frequency shift mass curve of monolayer/multilayer graphene films [85] ; (f) relation curve of resonant frequency and frequency shift with mass, the blue curve represents the change of resonant frequency with the number of graphene layers, and the red curve is the change of frequency shift [86] . 2013年, 日本信州大学的Natsuki课题组 [82] 采用连续介质弹性模型和瑞利能量法, 对单层圆形 石墨烯膜的振动频率特性进行分析.…”

“…2013年, 中国台湾昆山科技大学的Lee等 [84] 用ANSYS软件对单层石墨烯谐振式质量传感器 Gong等 [86] 更详细地对不同层数的石墨烯薄膜建 模, 并采用连续弹性二维板模型进行有限元分析,…”

Nanomechanical absorption spectroscopy of 2D materials with femtowatt sensitivity

“…Nanomechanical resonators emerged as sensitive probes for minuscule forces [1][2][3] and atomic-scale masses [4][5][6][7][8]. By incorporating two-dimensional (2D) materials into nanomechanical resonators, the miniaturization of these devices has been pushed to the ultimate limit of atomic thickness.…”

Nanomechanical absorption spectroscopy of 2D materials with femtowatt sensitivity

“…Nanomechanical resonators emerged as sensitive probes for minuscule forces [1][2][3] and atomic-scale masses. [4][5][6][7][8] By incorporating 2-dimensional (2D) materials into nanomechanical resonators, the miniaturization of these devices has been pushed to the ultimate limit of atomic thickness. Along with this comes a massively reduced effective mass, increased resonance frequencies, easily accessible non-linearity, and the ability to tune resonance frequencies.…”