Filters: School Or College: "College of Engineering" Collection: "ir_uspace" Subject: "Carbon nanotubes"
1 - 25 of 5
| Creator | Title | Description | Subject | Date | ||
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Liu, Feng | Computational designing of carbon nanotube electromechanical pressure sensors | We investigate electronic transport properties of single-walled carbon nanotubes (SWNT's) under hydrostatic pressure, using first-principles quantum transport calculations aided by molecular-dynamics simulation and continuum mechanics analysis. We demonstrate a pressure-induced metal-to-semiconduc... | Carbon nanotubes; Computational designing; Pressure sensors; Electronic transport | 2004-04 |
| 2 |
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Liu, Feng | Geometric constant defining shape transitions of carbon nanotubes under pressure | We demonstrate that when a single-walled carbon nanotube is under pressure it undergoes a series of shape transitions, first transforming from a circle to an oval and then from an oval to a peanut. Most remarkably, the ratio of the area of the tube cross sections at the second transition over that ... | Geometric constant; Shape transitions; Carbon nanotubes; Pressure | 2004-03 |
| 3 |
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Liu, Feng | Impurity mediated absorption continuum in single-walled carbon nanotubes | The authors demonstrate that in single-walled carbon nanotubes, a weak impurity potential can lead to a strong above-gap absorption continuum. The total absorption is enhanced due to the intraband and indirect transitions, as well as plasmon excitations, which are forbidden in perfect nanotubes. Suc... | Carbon nanotubes; SWNT; Defects; Impurities; Above-gap; Absorption continuum | 2007 |
| 4 |
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Liu, Feng | Metal-to-semiconductor transition in squashed armchair carbon nanotubes | We investigate electronic transport properties of the squashed armchair carbon nanotubes, using tight-binding molecular dynamics and the Green's function method. We demonstrate a metal-to-semiconductor transition while squashing the nanotubes and a general mechanism for such a transition. It is the ... | Squashed armchair; Carbon nanotubes; Metal-to-semiconductor transition; Electronic transport; Tight-binding molecular dynamics; Squashed nanotubes | 2003-04 |
| 5 |
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Liu, Feng | Pressure-induced hard-to-soft transition of a single carbon nanotube | We demonstrate a hydrostatic pressure-induced hard-to-soft transition of an isolated single wall carbon nanotube, using classical and ab initio constant-pressure molecular-dynamics simulations and continuum elastic theory analysis. At low pressure, the carbon tube is hard. Above a critical pressur... | Carbon nanotubes; Hard-to-soft transition | 2004-10 |
1 - 25 of 5