Investigation on Motion of Carbon Nanocoils by Magnetic Control
Date Issued
2011
Date
2011
Author(s)
Ku, Shang-Hao
Abstract
The method grows carbon nanocoils(CNCs) by Fe thin film and low concentration SnO2 as catalyst. The result shows it can grow high yield rate and high production mass CNCs and their diameter are about 3~5μm.
Evaporate Chromium and Nickel on the high yield rate CNCs to make them have permeability and name them swimming robots. Mix the Swimming robots with deionized water and disperse them by sonication. Then, drip the solution to the reservoir as observed sample.
Put the sample on the device which has three axes electromagnet. The magnetic field strength is 2.3mT. The motion under one axis driving is to rotate swimming robots to the direction which is vertical to the magnetic field line and then swimming robots sway at this position.
Under two axes driving and the phase difference is 90。, it will create rotating magnetic field to rotate the swimming robots. The swimming robots rotates and moves simultaneously under Z and X axes driving or Z and Y axes driving.
Swimming robots move forward or backward by changing the phase difference. Change the driving frequency, it finds out that the speed is proportional to the driving frequency among 2~5Hz, however, it’s not regular among 6~11Hz. The different sizes of swimming robots have different speeds. It has shown the one has bigger pitch and smaller contact surface with water has higher speed. Besides, do this experiment in the mineral oil. In this study, the fastest speed is 10.63 (μm/s) in water at 11Hz and the lowest speed is 0.057(μm/s) in mineral oil at 4Hz.
Subjects
CNCs
high yield rate
rotating magnetic field
swimming robots
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-100-R98522816-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):5e43c11f9e44e9b714c311503ab62f17