A comparison of adsorbate-induced faceting on flat and curved crystal surfaces

Simulation of adsorbate-induced faceting on curved surfaces

“…It is worth noting that we can also study a flat (1 1 1) surface by an appropriate choice of initial column heights in the circle. In this way we can compare adsorbate-induced faceting of flat and curved surfaces [30] using the same conditions, i.e., the annealing temperature, annealing Monte Carlo time, the number of surface atoms, and the boundary conditions. The restriction imposed on column heights of the nearest neighbours (see Section 2) limits the angular radius to h 6 20°.…”

Nanofaceted Metal Surfaces

“…There are a series of reports of metal-induced faceting of single crystal metal surfaces, including metal (Pt, Pd, Au, Ir, Rh) on W (111) and Mo (111) [44][45][46][47][48][49][50], metal (K) on Cu(115) [51] and metal (Pd and Au) on Ta (111) [52,53], as well as Pd and Pt overlayer-induced faceting of curved metal surfaces (e.g., a W tip [28,33]). However, the presence of an adsorbate can enhance the anisotropy in surface free energy considerably, making faceting more energetically favorable.…”

“…Extensive studies have been carried out on faceting of metal single-crystal surfaces induced by adsorption of nonmetallic species, e.g., (O and Cl) on W(111) [28,56,57], (O, S, N and CO) on Mo (111) [58][59][60], (N and S) on Fe(111) [61][62][63], (O and N) on Cu(11n) (n = 5 and 9) [64,65], N on Cu(410) [66], O/Ir (210) [17,67], O on Rh (210) and Rh(553) [68][69][70], (O and C) on Rh(755) [71], (O and N) on Ni (210) [72,73], N on Cu(210) [73], C on stepped Ni [74], O/Pt (210) [79,80]. Among these studies, oxygen-induced faceting of metal surfaces with face-centered cubic (fcc) and body-centered cubic (bcc) structures have been investigated the most.…”

Preferential Nucleation of Metallic Clusters on a Nanotemplate: Co on Oxygen-Faceted Re(12 $$ \overline{3} $$ 1)

“…All STM measurements are made with sample bias between 0.5 and 1.5 V and a tunneling current between 0.6 and 1 nA. The X, Y, and Z dimensions of the STM scan range are calibrated using atomically resolved STM images of S(4 9 4)/W(111) reconstruction and measurements of the tilt angle between the (211) and (111) planes on faceted O/W(111) [17,18]. The relative oxygen and cobalt coverages are determined from measurements of O/Re or Co/Re Auger peak height ratio as a function of dosing time at room temperature.…”