Abstract
Manipulation of onion-like carbon (OLC), also known as carbon nano-onions (CNOs), at the level of various arrays of microelectrodes is vital in practical applications such as biological and chemical sensing, ultracapacitors (supercapacitors), electromagnetic shielding, catalysis, tribology, optical limiting and molecular junctions in scanning tunneling microscopy, and field-effect transistors. In spite of technological developments in this area, rigorous handling of carbon nano-onions towards desired locations within a device remains a challenge, and the quantity of OLC required significantly influences the price of the final electrical or electronic device. We present herein an experimental study on electromanipulation and trapping of onion-like carbon (OLC) at the level of gold-patterned interdigitated microelectrodes through dielectrophoresis. The influence of the magnitude as well as frequency of the alternating-current (AC) voltage employed for OLC trapping is discussed in detail. The effects of tuning the AC field strength and frequency on the OLC trapping behavior are also considered.
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