Beilstein J. Nanotechnol.2017,8, 1836–1843, doi:10.3762/bjnano.8.185
, and suppress the nanoribbon–substrate interaction. The proposed structural model reproduces well all the experimental findings.
Keywords: density functional theory (DFT); scanning tunneling microscopy (STM); silicene; Sinanoribbons; Introduction
The discovery of the exotic nature of graphene [1][2
really been obtained. The same problem concerns Sinanoribbons (NRs) grown on the Ag(110) surface [32][33][34][35][36][37][38][39][40]. The scanning tunneling microscopy (STM) images show isolated 1.6 nm wide ribbons [32][35][41]. However, no hexagonal structure is visible in the STM topography. First
, the DFT calculations reveal the hexagonal structure of the Sinanoribbons, which are directly bonded to the bare Si(111) surface. However, Pb atoms play an important role in stabilizing the structure, as they lower the surface energy. The proposed structural model features a deformed honeycomb
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Figure 1:
(a) STM topography (U = 2.0 V, I = 0.5 nA) of Si nanoribbons on a Si(111) surface. (b) Line profile...
Beilstein J. Nanotechnol.2015,6, 777–784, doi:10.3762/bjnano.6.80
/bjnano.6.80 Abstract We demonstrate the kinetically controlled growth of one-dimensional Co nanomagnets with a high lateral order on a nanopatterned Ag(110) surface. First, self-organized Sinanoribbons are formed upon submonolayer condensation of Si on the anisotropic Ag(110) surface. Depending on the
growth temperature, individual or regular arrays (with a pitch of 2 nm) of Sinanoribbons can be grown. Next, the Si/Ag(110) system is used as a novel one-dimensional Si template to guide the growth of Co dimer nanolines on top of the Sinanoribbons, taking advantage of the fact that the thermally
activated process of Co diffusion into the Si layer is efficiently hindered at 220 K. Magnetic characterization of the Co nanolines using X-ray magnetic circular dichroism reveals that the first atomic Co layer directly adsorbed onto the Sinanoribbons presents a weak magnetic response. However, the second
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Figure 1:
STM images recorded at 77 K at submonolayer Si coverage showing single and double Si nanoribbons (N...