3 documents found, page 1 of 1
Crystal-oriented wrinkles with origami-type junctions in few-layer hexagonal bo...
Oliveira, Camilla Karla Brites Queiroz Martins de; Gomes, Egleidson Frederik do Amaral; Prado, Mariana C.; Alencar, Thonimar V.; Nascimento, Regiane doUnderstanding layer interplay is the key to utilizing layered heterostructures formed by the stacking of different two-dimensional materials for device applications. Boron nitride has been demonstrated to be an ideal substrate on which to build graphene devices with improved mobilities. Here we present studies on the morphology and optical response of annealed few-layer hexagonal boron nitride flakes deposited ...
Vibrational G peak splitting in laterally functionalized single wall carbon nan...
Oliveira, Alan Barros de; Chacham, Helio; Soares, Jaqueline dos Santos; Manhabosco, Taíse Matte; Resende, Hélio Fernando Verona deWe present a theoretical study of the vibrational spectrum, in the G band region, of laterally hydrogenated single wall carbon nanotubes through molecular dynamics simulations. We find that bilateral hydrogenation e which can be induced by hydrogenation under lateral strain e causes permanent oval deformations on the nanotubes and induces the splitting of vibrational states in the G-band region. We propose that...
Modifications in graphene electron states due to a deposited lattice of Au nano...
Carara, Sabrina Silva; Batista, Ronaldo Junio Campos; Chacham, HelioWe perform first-principles investigations of two-dimensional, triangular lattices of Au38 nanoparticles deposited on a graphene layer. We find that lattices of thiolate-covered nanoparticles cause electronic structure modifications in graphene such as minigaps, charge transfer, and new Dirac points, but graphene remains metallic. In contrast, for a moderate coverage of nanoparticles __0.2 nm−2_, a lattice of b...