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Three-dimensional vertical graphene flowers were fabricated using a simple, low-cost, and efficient chemical vapour deposition method with Ni(NO3)2 as a catalyst precursor and methane as a carbon precursor. Graphene flowers of up to 10 μm in size with petals of two to seven layers of graphene were obtained. The growth of the vertically aligned graphene flowers was attributed to a columnar growth mechanism...
With the ongoing miniaturization of devices such as FETs, the synthesis of ZnO NWs (building blocks) has attracted extensive research interest. ZnO NWs have been synthesized via different routes by many research groups. In order for these building blocks to be incorporated into functional nano-devices, controlled synthesis of the ZnO NWs to obtain features such as the desired size, shape and alignment...
We, along with others, have developed several chemical vapor deposition (CVD) methods for large-scale production of vertically-aligned single-walled, multiwalled, and super-long carbon nanotube arrays. The resultant aligned carbon nanotube arrays can be transferred onto various substrates of particular interest in either a patterned or non-patterned fashion. The well-aligned structure provides additional...
Multi-wall carbon nanotubes (MWNTs) have been synthesized by catalytic chemical vapor deposition of acetylene over Fe loaded mesoporous silica. The raw product contains the aerogel support, catalyst particles, and a small amount of amorphous carbon (mostly as a coating on the catalyst nanoparticles) as impurities. Before these materials can be used in many applications, these impurities must be removed...
In this paper, the authors reported the recent progress on the growth and characterization of aligned single-walled carbon nanotubes (SWNTs) on sapphire substrate. They introduced the position-and direction-controlled growth of SWNTs on a sapphire substrate and showed the highly-aligned SWNTs grown from the Fe-based wet catalyst patterned with the aid of an electron beam lithography technique. The...
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