High performance single-walled carbon nanotube field effect transistors SWCNT-FETs fabricated with thin atomic layer deposited ALD Al2O3 as gate dielectrics and passivation layer are demonstrated. A 1.5 m gate-length SWCNT-FETs with 15 nm thick Al2O3 insulator shows a gate leakage current below 10−11 A at −2.5 V Vg +7 V, a subthreshold swing of S 105 mV/decade, and a maximum on current of −12 A...

Single-walled carbon nanotubes have gained enormous popularity due to a variety of potential applications which will ultimately lead to increased human and environmental exposure to these nanoparticles. This study was carried out in order to evaluate the inflammatory response of immortalised and primary human lung epithelial cells (A549 and NHBE) to single-walled carbon nanotube samples (SWCNT)...

ONIOM calculation is carried out to estimate the acidity of five aliphatic alcohols before and after adsorbing on the tip of (8,0) single-walled carbon nanotube. The ONIOM method is performed using a combination of density functional theory and AM1 semiemperical method for alcohols and their corresponding conjugated bases. Deprotonation Gibbs free energies of alcohols are calculated and compare...

The electronic properties of carbon nanotubes can be altered significantly by modifying the nanotube surface. In this study, single-walled carbon nanotubes (SWCNTs) were functionalized noncovalently using designed surfactant peptides, and the resultant SWCNT electronic properties were investigated. These peptides have a common amino acid sequence of X(Valine)(5)(Lysine)(2), where X indicates an...

The synthesis of precisely defined nanoscale hybrid materials remains a challenge at the frontier of chemistry and material science. In particular, the assembly of diverse high-aspect ratio one-dimensional materials such as gold nanorods and carbon nanotubes into functional systems is of ever increasing interest due to their electronic and sensing applications. To meet these challenges, methods...

the adsorption of a number of amino acids on a defected single-walled carbon nanotube (swcnt) isinvestigated by using the density-functional theory (dft) calculations. the adsorption energies andequilibrium distances are calculated for various configurations such as amino acid attaching to defectsites heptagon, pentagon and hexagon in defective tube and also for several molecular orientationswi...

The presence of defects in a regular structure of graphene and carbon nanotubes (CNTs) can significantly influence their mechanical properties. In this work, the effect of an absence of a carbon atom (vacancy defect) on the strength of a graphene sheet and a single walled carbon nanotube (SWCNT) is studied using quasi static molecular dynamics (QSMD) simulations. Results show that a graphene sh...

Submitted for the MAR14 Meeting of The American Physical Society Chirally Selective Growth of Single Walled Carbon Nanotube on Fe13 Nanocatalyst 1 ANTENEH TEFERA, MOGUS MOCHENA, Florida A&M University — Controlled growth of single walled carbon nanotubes with desired chiral indices remains the holy grail of single walled carbon nanotube synthesis. We performed ab initio molecular dynamics calcu...

Graphene and single-walled carbon nanotube (SWCNT) have been widely studied because of their extraordinary electrical, thermal, mechanical, and optical properties. This paper describes a novel and flexible method to fabricate all-carbon field-effect transistors (FETs). The fabrication process begins with assembling graphene grown by chemical vapor deposition (CVD) on a silicon chip with SiO2 as...

Carbon nanotube (CNT) is considered as a new generation of material possessing superior mechanical, thermal and electrical properties. The applications of CNT, especially in composite materials, i.e. carbon nanotube reinforced polymer have received great attention and interest in recent years. To characterize the influence of CNT on the stress intensity factor of nanocomposites, three fracture ...