Optical characterization of tip bended Vertically Aligned Carbon Nanotubes array

Abstract

Vertically Aligned Carbon Nanotube arrays (also termed as VACNTs or CNT forest) have recently found to be transformable to a reflective mirror from a naturally black absorber. The feature of improved reflectance can be attained by the controllable tip bending process using the bottom surface of a rotated cylindrical tool (the process called micromechanical bending (M2B)). In this paper, the polarized light reflectance of bent and compacted region of the CNT forest using M2B method has been investigated. We observed that reflectance from the processed CNT zone was highly dependent on the angle of incidence and polarization state of the incident laser. For the first time, the refractive index of the tip bent CNT forests by M2B method was investigated and found to be in a range of ~1.8.

Smooth surface induced glossy appearance of freestanding multiwall carbon nanotube sheet

“…Few research groups reported the high reflectance and glossy appearance of CNT surface, such as bent CNT forest [9][10][11][12][13] and slope control of temperature profile growth of vertically aligned CNT [14]. Atomic force microscopy (AFM) showed the low surface roughness of the top surface of bent CNT forest [12].…”

Deposition of Magnetic Carbon Nano Tubes with Chromium Seed

“…Single-walled carbon nanotubes can be conductive and semiconducting. The elec-trical properties of the carbon nanotubes depend on the diameter of the tubes and the chiral angle [2]- [7]. The CNTs exhibit excellent properties for many applications, including: electrical, electro-optical, optical, optoelectronic, mechanical, electromechanical, magnetic, electromagnetic, chemical, electrochemical, thermal and thermoelectric properties [8].…”