scholarly journals Biomimetic three-dimensional nanocrystalline hydroxyapatite and magnetically synthesized single-walled carbon nanotube chitosan nanocomposite for bone regeneration

2012 ◽  
pp. 2087 ◽  
Author(s):  
Lijie Grace Zhang ◽  
Owen Im ◽  
Jian Li ◽  
Michael Keidar
Keyword(s):  
Carbon Nanotube ◽  
Bone Regeneration ◽  
Three Dimensional ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Nanocrystalline Hydroxyapatite

Fabrication of Three-Dimensional Single-Walled Carbon Nanotube Networks Suspended on Si Pillar Architecture

2017 ◽  
Vol 17 (8) ◽  
pp. 5900-5902
Author(s):  
Jongtaek Lee ◽  
Junyoung Lee ◽  
Jonghee Yang ◽  
Taehun Park ◽  
Sang Jung Ahn ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Three Dimensional ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Networks

Three dimensional solid-state supercapacitors from aligned single-walled carbon nanotube array templates

Carbon ◽  
2011 ◽  
Vol 49 (14) ◽  
pp. 4890-4897 ◽  
Author(s):  
Cary L. Pint ◽  
Nolan W. Nicholas ◽  
Sheng Xu ◽  
Zhengzong Sun ◽  
James M. Tour ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Three Dimensional ◽  
Nanotube Array ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Array

Improving the Sound Pressure Level of Two-Dimensional Audio Actuators by Coating Single-Walled Carbon Nanotubes on Piezoelectric Films

2015 ◽  
Vol 15 (10) ◽  
pp. 7546-7550
Author(s):  
Keehong Um
Keyword(s):  
Carbon Nanotube ◽  
Surface Resistance ◽  
Piezoelectric Effect ◽  
Piezoelectric Materials ◽  
Three Dimensional ◽  
Operating Frequency ◽  
Two Dimensional ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Internal Generation

As devices for amplifying or transforming electronic signals into audible signals through electromechanical operations, acoustic actuators in the form of loudspeakers are usually solid structures in three dimensional space. Recently there has been increasing demand for mobile electronic devices, such as mobile phones, to become smaller, thinner, and lighter. In contrast to a three dimensional audio system with magnets, we have invented a new type of flexible two dimensional device by utilizing the reverse piezoelectric effect in certain piezoelectric materials. Crystalline piezoelectric materials show electromechanical interaction between the mechanical state and the electrically-charged state. The piezoelectric effect is a reversible process in that materials exhibiting the direct piezoelectric effect (the internal generation of electrical charge resulting from an applied mechanical force) also exhibit the reverse piezoelectric effect (the internal generation of a mechanical strain resulting from an applied electrical field). We have adopted the plasma surface treatment in order to put coating materials on the surface of piezoelectric film. We compared two kinds of coating material, indium tin oxide and single-walled carbon nanotube, and found that single-walled carbon nanotube shows better performance. The results showed improvement of output power in a wider range of operating frequency; for the surface resistance of 0.5 kΩ/square, the single-walled CNT shows the range of operating frequency to be 0.75–17.5 kHz, but ITO shows 2.5–13.4 kHz. For the surface resistance of 1 kΩ/square, single-walled CNT shows the range of operating frequency to be 0.81–17 kHz, but ITO shows it cannot generate audible sound.

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