Synthesis of Large Arrays of Well-Aligned Carbon Nanotubes on Glass

Abstract

Free-standing aligned carbon nanotubes have previously been grown above 700°C on mesoporous silica embedded with iron nanoparticles. Here, carbon nanotubes aligned over areas up to several square centimeters were grown on nickel-coated glass below 666°C by plasma-enhanced hot filament chemical vapor deposition. Acetylene gas was used as the carbon source and ammonia gas was used as a catalyst and dilution gas. Nanotubes with controllable diameters from 20 to 400 nanometers and lengths from 0.1 to 50 micrometers were obtained. Using this method, large panels of aligned carbon nanotubes can be made under conditions that are suitable for device fabrication.

Tuning luminescence of 3d transition- metal doped quantum particles: Ni+2: CdS and Fe+3: CdS

“…Mn +2 of this configuration, having the smallest D q value among transition metal ions is a suitable activator for green-to red-emitting phosphors [28]. On the other hand, the lowest multiplet term 3 F of the free Ni +2 ion in split into 1 T 2g ( 1 D), 3 T 2g ( 3 F) and 3 A 2g ( 3 F) through the anisotropic hybridization [29,30]. Three luminescence bands in the near IR, red and green parts of the spectrum characterize Ni +2 in many synthetic luminofors [31].…”

“…Colloidal luminescent semiconductor nanocrystals (NCs), also known as quantum dots (Q-dots), have attracted considerable attention due to their significant potential application [1][2][3]. Quantum size effects (QSE) associated with the low dimensionality lead to several remarkable modifications in the physical properties of materials [4][5][6].…”

Direct attachment of well-aligned single-walled carbon nanotube architectures to silicon (100) surfaces: a simple approach for device assembly

“…[23][24][25] In this regard, many efforts have been undertaken to fabricate highly oriented carbon nanotubes on device surfaces based on direct growth by chemical vapor deposition and self-assembling techniques. 4,5,23,26,27 The direct patterned growth of aligned carbon nanotube arrays has been widely explored and successfully developed using chemical vapour deposition techniques. However, these methods have limitations with regard to large-scale applications because of the high growth temperature required, 4,26 poor adhesion between nanotubes and substrates, 5 success only for multi-walled carbon nanotubes 28 and the closed ends of carbon nanotubes.…”

Controlled Growth-Reversal of Catalytic Carbon Nanotubes under Electron-Beam Irradiation

“…The catalytic growth of carbon nanotubes is currently the method of choice for growing vertically-aligned patterned arrays for a wide range of electronic, gas sensing and biological applications [1][2][3] . Significant advances in the understanding of the growth processes have generally been linked to their in-situ observation [4][5][6][7][8] , usually in specially-modified electron microscopes.…”