Study on micro-patterning process of vertically aligned carbon nanotubes (VACNTs)

Abstract

View references (30)

Optical characterization of tip bended Vertically Aligned Carbon Nanotubes array

“…The micromechanical bending (M2B) process [9] was performed using a servo-controlled 3-axis Micro-CNC system. This machine can move at 1-µm positioning resolution.…”

“…Fig. 1(b) shows a field emission scanning electron microscopic (FESEM) image of a square pattern that was produced by the M2B method with the 300 µm micro tool using the optimum parameter (2000 rpm of micro tool's rotational speed, 1 mm/min of lateral speed and 1 µm of step size for a total of 60 µm depth of bend) as identified by Asyraf et al [9].…”

“…The increase in reflection was significant from 0.045% [7] to 10-15% [8] across a wide range of the spectrum (570 -1100 nm). The method mentioned above, called Micro-mechanical bending (M2B) was thoroughly studied and characterized for its usefulness in 3-dimensional and free-form micro-patterning of VACNTs array by Asyraf et al [9]. In the same paper [9] we showed the influence of different parameters of the M2B process such as tool's rotational speed, step size, and lateral speed on the properties of the resultant surface such as white light reflectivity, structural integrity, and surface roughness.…”

“…The method mentioned above, called Micro-mechanical bending (M2B) was thoroughly studied and characterized for its usefulness in 3-dimensional and free-form micro-patterning of VACNTs array by Asyraf et al [9]. In the same paper [9] we showed the influence of different parameters of the M2B process such as tool's rotational speed, step size, and lateral speed on the properties of the resultant surface such as white light reflectivity, structural integrity, and surface roughness. However, in this paper, we are further reporting the polarization dependent optical reflectance of the tip bent CNT forest for a monochromatic green laser (532 nm).…”

Investigation of anisotropic reflectance from densified arrays of vertically aligned carbon nanotube forests (VACNTs)

“…As a black body material, the carbon nano-tubes revealed different interesting characteristics such as if the height of VACNTs is less than 500nm then it can produce colorful iridescence being reflected from the substrate [5]. Through micro mechanical treatment on the top surface of vertically aligned CNTs, the maximum reflectance was shown up to 15% having different applications as described in [6][7][8]. The polarized reflectance from tipbent VACNTs at broadband wavelength also have been studied by [9].…”