Absence of stable atomic structure in fluorinated graphene

Based on the results of first-principles calculations we demonstrate that significant distortion of graphene sheets caused by adsorption of fluorine atoms leads to the formation of metastable patterns for which the next step of fluorination is considerably less energetically favorable. Existence of these stable patterns oriented along the armchair direction makes possible the synthesis of various CFx structures. The combination of strong distortion of the nonfluorinated graphene sheet with the doping caused by the polar nature of C-F bonds reduces the energy cost of migration and the energy of migration barriers, making possible the migration of fluorine atoms on the graphene surface as well as transformation of the shapes of fluorinated areas. The decreasing energy cost of migration with increasing fluorine content also leads to increasing numbers of single fluorine adatoms, which could be the source of magnetic moments.Comment: 16 pages, 6 figures (one figure added), accepted in PCC

Atomic and electronic structure of nitrogen- and boron-doped phosphorene

First principle modeling of nitrogen- and boron-doped phosphorene demonstrates the tendency toward formation of highly ordered structures. Nitrogen doping leads to the formation of -N-P-P-P-N- lines. Further transformation to -P-N-P-N- lines across the chains of phosphorene occurs with increasing band gap and increasing nitrogen concentration, which coincides with the decreasing chemical activity of N-doped phosphorene. In contrast to the case of nitrogen, boron atoms prefer to form -B-B- pairs with the further formation of -P-P-B-B-P-P- patterns along the phosphorene chains. The low concentration of boron dopants converts the phosphorene from a semiconductor into a semimetal with the simultaneous enhancement of its chemical activity. Co-doping of phosphorene by both boron and nitrogen starts from the formation of -B-N- pairs, which provide flat bands and the further transformation of these pairs to hexagonal BN lines and ribbons across the phosphorene chains.Comment: 21 pages, 8 figures, 2 tables, to appear at PCC

Perancangan Visual untuk Pengembangan Produk Glosport di Arterie Studio

Pandemi yang terjadi di Indonesia membuat tidak sedikit yang memaksa brand untuk beradaptasi dengan keadaan. Untuk bertahan dikondisi tersebut, brand mulai beralih untuk mengatur strategi pemasaran secara digital. Munculnya wajah baru pelaku usaha di dunia digital menyebabkan kebutuhan identitas dan promosi di media digital semakin meningkat. Berdasar dari fenomena ini, penulis dalam rangka program internship, berkesempatan untuk melakukan praktik kerja magang untuk mempelajari dan mengetahui cara membangun brand dan bagaimana sebuah brand melakukan strategi penjualan di media digital. Penulis melaksanakan praktik kerja magang sebagai desainer grafis di Arterie Studio yang merupakan studio desain dengan fokus utama pelayanan pada branding dan sosial media. Dalam praktiknya, penulis mengalami kendala berupa kurangnya pengalaman pada dunia kerja dan dibutuhkannya adaptasi dengan lingkungan baru. Namun, penulis dapat menghadapi kendala tersebut dengan bantuan dan dukungan dari tim dari Arterie Studio yang senantiasa membantu penulis jika menemukan kendala. Selama pelaksanaan magang, penulis belajar bagaimana merancang visual untuk mengembangkan produk dan disertai media promosi secara online yang dilakukan oleh pelaku usaha