12 With high carrier mobility and saturation velocity, graphene has promising applications in ultrahigh speed radiofrequency electronics. 10Īs a monatomic layer of carbon atoms in a honeycomb lattice, 11 graphene is one of the strongest materials ever tested with tensile strengths greater than 100 GPa and a tensile modulus of 1 TPa. 2 Ever since graphene was first created in 2004, 9 many claim that it can be used in a host of device applications, carbon-based electronics, even rivaling silicon as the electronics material of choice in the future. 8 Synthesis and discovery of new carbon phases with high stability, novel bonding characteristics, unique properties, and applications will be an ongoing effort for theoretical, synthetic, and material scientists. As a consequence, carbon has numerous allotropes 1, 2 such as graphene, 3, 4 fullerenes, 5 carbon nanotubes, 6 nanorings, 7 and nanobuds. Carbon has various hybridized states (sp, sp 2, sp 3) and can form diverse bonding, with the ability to bind to itself and to nearly all elements. Because these materials are close to graphene and will play important roles in carbon-based electronic devices, they deserve further, careful, and thorough studies for nanotechnology applications.įound in almost all known life forms, carbon provides the basis for life on Earth. With a band gap and magnetism, graphone and graphane show important applications in nanoelectronics and spintronics. Graphyne is better than graphene in directional electronic properties and charge carriers. Here, we briefly review their properties, including structural, mechanical, physical, and chemical properties, as well as their synthesis and applications in nanotechnology. The advanced and unique properties of these new materials make them highly promising for applications in next generation nanoelectronics. Graphone and graphane are hydrogenated derivatives of graphene. Graphyne and graphdiyne are two-dimensional carbon allotropes of graphene with honeycomb structures. Besides to the adsorption energy ( E a d s), the adsorption distance (( D), charge transfer ( Δ Q), the density of states (DOS), as well as the band structure have been examined to confirm the adsorption of CO and CO 2 on the four systems.Plenty of new two-dimensional materials including graphyne, graphdiyne, graphone, and graphane have been proposed and unveiled after the discovery of the “wonder material” graphene. Moreover, an increase of almost 13 times was observed in the adsorption energy for the case of CO on Pt–H-AGNR. After doping, the results revealed a significant increase in the adsorption energy to almost 9 times than the non-doped systems for the cases of CO on Pt–N-AGNR as well as CO 2 on both Pt–H-AGNR and Pt–N-AGNR. To enhance the sensing performance, both H-AGNR and N-AGNR systems were doped with platinum (Pt) forming another two systems: Pt–H-AGNR, and Pt–N-AGNR. Particularly, the adsorption energies between H-AGNR and N-AGNR systems and CO were found to be −0.446 and −0.436 eV, while for the case of CO 2, the adsorption energies were found to be −0.426 and −0.432 eV, respectively. The obtained results reflected no significant changes in the adsorption parameters of CO and CO 2 molecules on H-AGNR and N-AGNR. First, the effect of passivating AGNR on the sensing performance toward CO and CO 2 gases has been investigated, where AGNR was passivated with hydrogen (H-AGNR) and nitrogen (N-AGNR). In this work, four armchair graphene nanoribbon (AGNR) based sensor materials were built using Atomistic ToolKit Virtual NanoLab (ATK-VNL) and utilized to detect carbon monoxide (CO) and carbon dioxide (CO 2) gases.
0 kommentar(er)
