TY - JOUR
T1 - Controlled formation of sharp zigzag and armchair edges in graphitic nanoribbons
AU - Jia, Xiaoting
AU - Hofmann, Mario
AU - Meunier, Vincent
AU - Sumpter, Bobby G.
AU - Campos-Delgado, Jessica
AU - Romo-Herrera, José Manuel
AU - Son, Hyungbin
AU - Hsieh, Ya Ping
AU - Reina, Alfonso
AU - Kong, Jing
AU - Terrones, Mauricio
AU - Dresselhaus, Mildred S.
PY - 2009/3/27
Y1 - 2009/3/27
N2 - Graphene nanoribbons can exhibit either quasi-metallic or semiconducting behavior, depending on the atomic structure of their edges. Thus, it is important to control the morphology and crystallinity of these edges for practical purposes. We demonstrated an efficient edge-reconstruction process, at the atomic scale, for graphitic nanoribbons by Joule heating. During Joule heating and electron beam irradiation, carbon atoms are vaporized, and subsequently sharp edges and step-edge arrays are stabilized, mostly with either zigzag- or armchair-edge configurations. Model calculations show that the dominant annealing mechanisms involve point defect annealing and edge reconstruction.
AB - Graphene nanoribbons can exhibit either quasi-metallic or semiconducting behavior, depending on the atomic structure of their edges. Thus, it is important to control the morphology and crystallinity of these edges for practical purposes. We demonstrated an efficient edge-reconstruction process, at the atomic scale, for graphitic nanoribbons by Joule heating. During Joule heating and electron beam irradiation, carbon atoms are vaporized, and subsequently sharp edges and step-edge arrays are stabilized, mostly with either zigzag- or armchair-edge configurations. Model calculations show that the dominant annealing mechanisms involve point defect annealing and edge reconstruction.
UR - http://www.scopus.com/inward/record.url?scp=63449116426&partnerID=8YFLogxK
U2 - 10.1126/science.1166862
DO - 10.1126/science.1166862
M3 - Article
AN - SCOPUS:63449116426
SN - 0036-8075
VL - 323
SP - 1701
EP - 1705
JO - Science
JF - Science
IS - 5922
ER -