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It is reported that field emission can effectively enhanced for aligned carbon nanotubes (CNTs) as field emitters when the ratio of distance between neighboring nano-tubes to the height of each individual CNT is about 2. In this paper, we proposed pillar array design of CNTs to fulfill the optimum R/H ratio (the ratio between inter-pillar distance R and pillar height H) with high density of aligned...
Multiwalled carbon nanotubes (MWNTs) have been functionalised with 5-aminoisophthalic acid in an aqueous solution through an environmentally friendly diazonium-based process. The as-prepared isophthalic acid (IPA)-modified MWNT (IPA-MWNT) hybrids became more easily suspended or dissolved in water. The relative content of the covalently attached IPA substituents was about 7–9% (w/w) in the hybrids...
In this paper, Fe/Ti and Co/Ti bi-layered catalysts were used to study the growth and field emission characteristics of carbon nanotubes(CNTs). Nanoparticles of Co/Ti bi-layered catalyst are uniform in size and smaller than those from Fe/Ti bi-layered catalyst. Well graphite structure of CNTs grown by Fe/Ti and Co/Ti bi-layered catalysts were confirmed by TEM and Raman analyses. Besides, CNTs grown...
Effect of carbon nanotube pillar arrays' edge effect on field emission characteristics is first studied. The ratio of field emission current density at 5.733V/μm is about 55: 6.5: 1 which is nearly proportional to the edge ratio (50:5:1) for small, middle, and large sizes of CNTs' arrays. Besides, ultra low turn-on field (~1.4 V/μm), well emission image uniformity and stability of about ±6.52 % at...
Low temperature processes are the better ways to integrate carbon nanotubes (CNTs) with CMOS chips into array-type gas sensors. Almost the metal used in CMOS is Al-Si-Cu alloy, which make the sustainable temperature of CMOS structures be in the range of 400- 500degC. We offer a new fabrication method of CNTs-based gas sensors at low temperature. The oxidized silicon substrate was modified with 3-aminopropyltriethoxysilane...
In this paper, we investigated the self-cleaning effects of biomimetic dry adhesives, which are made of e-beam photoresist and carbon nanotubes (CNT). Although the photoresist and the CNT are both intrinsically hydrophilic, superhydrophobic behavior was obtained when they were patterned or synthesized into nano-fibrils. The intrinsic hydrophilicity indicates that these materials possess sufficient...
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