Surface Modification of Carbon Nanotubes for Nano Transformer Cuong Diep1, Milena Fernandez2, Dr. Vesselin Shanov1, Dr. Noe Alvarez1 1School of Energy, Environmental, Biological and Medical Engineering, 2School of Electronic and Computing

1
Surface Modification of Carbon Nanotubes for Nano
TransformerCuong Diep1, Milena Fernandez2, Dr.
Vesselin Shanov1, Dr. Noe Alvarez11School of
Energy, Environmental, Biological and Medical
Engineering, 2School of Electronic and Computing
SystemsUniversity of Cincinnati, Cincinnati, OH,
45221

• Introduction
• The Carbon Nanotube (CNT) is an interesting type
  of material due to its superior strength, and
  electrical conductivity1. CNTs are grown by a
  chemical vapor deposition (CVD) process in a
  pressurize chamber. It is a promising
  electrochemical technology that can possibly
  replace the use of other conductive materials
  which face different disadvantages.
• Objectives
• Design transformer.
• Modify CNT threads by the processes of doping and
  coating.
• Integrate modified threads within transformer.
• Connect transformer to a power supply.
• Using transformer, power a light source.
• Transformer

Fig. 2 Resistivity vs. Diameter plot
for 57 oC Sample Fig.3Input Voltage vs.
Output Voltage of the copper to copper toroid
transformer Fig4Input Voltage vs. Output
Voltage of the copper to CNT thread toroid
transformer Conclusion The improvements in
surface modification of CNT threads has enhanced
their properties. Thus, allowing us to use CNT
threads in many different electrical
applications. This development will be cost
effective , lighter in weight, and possesses a
better quality material. References 1 Shi,
Z., Wang, Z., Gu, Z., Pristine and Filled
Double-Walled Carbon Nanotubes. (2010) 2
(2005). Device Fabrication. United States
Department of Labor,lthttp// www.OSHA.govgt (Nov.
20, 2012). Acknowledgement Dr. Vesselin Shanov
- Vesselin.shonov_at_uc.edu Dr. Noe
Alvarez-alvarene_at_ucmail.uc.edu Nick
Kienzleil Doug Hurd
Doping This process is in which impurity
junctions are added into a semiconductor wafer in
order to form regions of conflicting electrical
conductivity.2 For this project we had mixed an
acid with water, creating a reaction. The
oxidation of the acid releases a charge that
attaches itself onto the surface of the carbon
nanotubes, increasing their conductivity. Coating
This is the insulation process in
which we first use nylon to uniformly coat the
CTN threads surface area. Once this coating
dries, it starts to become brittle and flakes
itself off. The thread is then completely coated
a second time with nitrile.
Results Table 1 This data
shows the advances in resistivity for CNT
threads.
Fig.1 Toroid transformer. (Top winding is an
insulated copper wire and bottom winding is a CNT
thread).
Material Average Resistivity (O ? m)
CNT (Nitric Acid) 1.1210-5
CNT (Sulfuric Acid) 1.2010-5
Copper 1.6810-6