Pregled bibliografske jedinice broj: 1058778
Sulfur Structures on Bare and Graphene-Covered Ir(111)
Sulfur Structures on Bare and Graphene-Covered Ir(111) // Journal of physical chemistry. C, 124 (2020), 12; 6659-6668 doi:10.1021/acs.jpcc.9b11641 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1058778 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Sulfur Structures on Bare and Graphene-Covered Ir(111)
Autori
Pielić, Borna ; Hall, Joshua ; Despoja, Vito ; Šrut Rakić, Iva ; Petrović, Marin ; Sohani, Ali ; Busse, Carsten ; Michely, Thomas ; Kralj, Marko
Izvornik
Journal of physical chemistry. C (1932-7447) 124
(2020), 12;
6659-6668
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Superstructures ; Sulfur ; Two dimensional materials ; Transition metals ; Intercalation
Sažetak
We present a study of sulfur adsorption on bare Ir(111). Two well-defined superstructures are found: a sqrt3R30 and a c(4 × 2) S- adlayer. Moreover, we also investigate sulfur intercalation of graphene on Ir(111). For adsorption, sulfur is provided either in the form of the precursor molecule H2S or as elemental sulfur through sublimation from FeS2 heated in a Knudsen cell. On the basis of scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED), as well as density functional theory calculations (DFT), we present a model for the c(4 × 2) superstructure consistent with surface relaxations. We show that above a graphene coverage threshold, when islands of the two-dimensional (2D) material start to coalesce, the sulfur superstructure intercalated below graphene depends on the form in which sulfur is provided: c(4 × 2) forms in the case of exposure to elemental sulfur, while the sqrt3R30 superstructure forms in the case of H2S exposure. The two intercalation structures influence the graphene moiré corrugation in different ways. We have used DFT calculations to determine sulfur adsorption energies, surface relaxations, and the influence of sulfur intercalation on the density of electronic states of graphene on Ir(111).
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
IP-2016-06-3211 - Optička svojstva heterostruktura dihalkogenida prijelaznih metala (OhTMD) (Kralj, Marko, HRZZ - 2016-06) ( CroRIS)
Ustanove:
Institut za fiziku, Zagreb
Profili:
Marko Kralj
(autor)
Marin Petrovic
(autor)
Vito Despoja
(autor)
Iva Šrut Rakić
(autor)
Borna Pielić
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus