Thermal effects on mass detection sensitivity of carbon nanotube resonators in nonlinear oscillation regime

2015 ◽  
Vol 74 ◽  
pp. 39-44 ◽  
Author(s):  
Dong-Keun Kang ◽  
Hyun-Ik Yang ◽  
Chang-Wan Kim
Keyword(s):  
Carbon Nanotube ◽  
Nonlinear Oscillation ◽  
Thermal Effects ◽  
Detection Sensitivity ◽  
Oscillation Regime ◽  
Mass Detection

Nonlinear Forced Vibration Analysis of a Non-Local Carbon Nanotube Carrying Intermediate Mass

2015 ◽  
Author(s):  
Zia Saadatnia ◽  
Ebrahim Esmailzadeh
Keyword(s):  
Carbon Nanotube ◽  
Forced Vibration ◽  
Beam Theory ◽  
Analytical Form ◽  
Harmonic Excitation ◽  
Local Theory ◽  
Mass Detection ◽  
Intermediate Mass ◽  
Non Local ◽  
Forced Vibration Analysis

The aim of this study is to model and investigate the nonlinear transversal vibration of a carbon nanotube carrying an intermediate mass along the structure considering the nonlocal and non-classical theories. Due to the application of the proposed system in sensors, actuators, mass detection units among others, the analysis of forced vibration of such systems is of an important task being considered here. The governing equation of motion is developed by combining the Euler-Bernoulli beam theory and the Eringen non-local theory. The Galerkin approach is employed to obtain the governing differential equation of the system and the transient beam response for the clamped-hinged boundary condition. A strong perturbation method is utilized to solve the equation obtained and the system responses subjected to a harmonic excitation is examined. The steady-state motion is studied and the frequency response in an analytical form is obtained. Finally, results are evaluated for some numerical parameter values and their effect on the frequency responses are presented and fully discussed.

Nonlocal Modeling and Behavior of Carbon Nanotube-Based Sensors in Thermal Environment

2018 ◽  
Author(s):  
Seyedeh Sepideh Ghaffari ◽  
Samantha Ceballes ◽  
Abdessattar Abdelkefi
Keyword(s):  
Carbon Nanotube ◽  
Thermal Effects ◽  
Thermal Environment ◽  
Nonlocal Parameter ◽  
Nonlocal Theory ◽  
Small Scale ◽  
Mass Sensor ◽  
Buckling Behavior ◽  
Mass Detector ◽  
And Behavior

An exact solution that investigates the pre-buckling characteristics of nonlocal carbon nanotube (CNT)-based mass sensor subjected to thermal load under clamped-clamped boundary condition is determined. The uniform temperature rise is utilized to study thermal effects on the sensitivity of the mechanical resonator in pre-buckling configuration. Using Eringen’s nonlocal theory, along with the Hamilton’s principle, the governing equations considering small scale and geometric nonlinearity are derived. The influences of important parameters including nonlocal parameter, temperature change, length, and diameter of the CNT on the pre-buckling behavior and frequency shift of the CNT-based mass detector are also studied. Results show that these parameters have significant impact on the dynamic characteristics of the CNT-mass sensor.

Detection Trace Copper by Carbon Nanotube Chemically Modified Electrode via Flame Synthesis

2011 ◽  
Vol 688 ◽  
pp. 37-40
Author(s):  
Qi Jiang ◽  
Rong Yang ◽  
Zheng Wen He ◽  
Bin Huang ◽  
Yong Zhao
Keyword(s):  
Carbon Nanotube ◽  
Modified Electrode ◽  
Electrochemical Detection ◽  
Graphite Electrode ◽  
Chemically Modified Electrode ◽  
Detection Sensitivity ◽  
Flame Synthesis ◽  
Chemically Modified ◽  
Ethanol Flame

The grown in situ carbon nanotube chemically modified electrode (GSCNT-CME) was prepared by growing carbon nanotube (CNT) in situ on the pretreated graphite electrode (GE) via a liquid ethanol flame. The GSCNT-CME was applied to detect the trace copper in water. The researching results showed that the GSCNT-CME has good electrochemical detection sensitivity and accuracy in the detection of trace copper in water.

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