User talk:Marujpj



Penta-silicene denotes a silicon-based two-dimensional (2D) structure, a cousin of silicene, composed entirely of Si pentagons, in analogy with Penta-graphene,a hypothetical variant of graphene. To date, such a striking structure has only been obtained synthetically as one-dimensional nanoribbons (1D-NRs) grown on a silver (110) substrate. These NRs adopt a highly ordered chiral arrangement in single- and/or double-strands (SNRs and DNRs, respectively). They were discovered in 2005 upon depositing Si onto the Ag(110) surface held at room temperature or at about 200°C, and observed in Scanning Tunneling Microscopy,. However, their unique atomic structure was unveiled only in 2016 through thorough Density Functional Theory calculations and simulations of the STM images. It consists of alternating Si pentagons residing along a missing row formed at the silver surface during the growth process (see Fig. 1). In the Penta-silicene NRs each Si pentagonal moeity displays an envelope conformation whereby four atoms are coplanar and a fifth flap atom protudes out of the surface. The pentagons, nevertheless, do not deviate much from regular ones (see Fig. 2). DNRs consist of two SNRs with the same handedness running in parallel along two missing rows separated by two Ag lattice constants (aAg = 4.1 Å) (see Fig. 3). These theoretical results were further corroborated later in a detailed surface X-Ray Diffraction study. The uniqueness of Penta-silicene NRs resides in the fact that pentagonal Si motifs are hardly found in nature. Despite large efforts devoted to design Si-based structures analogous to those of carbon, the existence of Si pentagonal rings had only been reported in clathrate bulk phases or in Si surface reconstructions, like, typically, for the cleaved Si(111)2x1 surface. Moreover, the discovery of 1D-Penta-silicene NRs puts hope on the future isolation of this new low dimensional Si allotrope, provided these epitaxial NRS can be detached from the silver surface. The possibilities offered by this unprecedented 1D pentagonal structure are manyfold, ranging from enlarged spin–orbit effects to Si-based nano-wires.

Your submission at Articles for creation: Penta-silicene has been accepted
 Penta-silicene, which you submitted to Articles for creation, has been created. The article has been assessed as Start-Class, which is recorded on the article's talk page. You may like to take a look at the grading scheme to see how you can improve the article. You are more than welcome to continue making quality contributions to Wikipedia. . Thank you for helping improve Wikipedia! Graeme Bartlett (talk) 23:04, 7 November 2017 (UTC)
 * If you have any questions, you are welcome to ask at the  [//en.wikipedia.org/w/index.php?title=Wikipedia:WikiProject_Articles_for_creation/Help_desk&action=edit&section=new&nosummary=1&preload=Template:AfC_talk/HD_preload&preloadparams%5B%5D=Penta-silicene help desk] .
 * If you would like to help us improve this process, please consider.