Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Optical Response, Lithium Doping, and Charge Transfer in Sn-Based 312 MAX Phases
Δημιουργός/Συγγραφέας:	Hadi, Md Abdul Kelaidis, Nikolaos Christopoulos, Stavros-Richard G Chroneos, Alexander Naqib, Saleh Hasan Islam, A K M Azharul
Ημερομηνία:	2023-07-06
Γλώσσα:	Αγγλικά
ISSN:	2470-1343 2470-1343
DOI:	10.1021/acsomega.3c03645
Άλλο:	37483256
Περίληψη:	The optical response, lithium doping, and charge transfer in three Sn-based existing M3SnC2 MAX phases with electron localization function (ELF) were investigated using density functional theory (DFT). Optical calculations show a slight optical anisotropy in the spectra of different optical parameters in some energy ranges of the incident photons. The peak height is mostly slightly higher for the polarization ⟨001⟩. The highest peak shifts toward higher energy when the M-element Ti is replaced by Zr and then by Hf. Optical conductivity, refractive index, extinction coefficient, and dielectric functions reveal the metallic nature of Ti3SnC2, Zr3SnC2, and Hf3SnC2. The plasma frequencies of these materials are very similar for two different polarizations and are 12.97, 13.56, and 14.46 eV, respectively. The formation energies of Li-doped Zr3SnC2 and Hf3SnC2 are considerably lower than those of their Li-doped 211 MAX phase counterparts Zr2SnC and Hf2SnC. Consistently, the formation energy of Li-doped Ti3SnC2 is lower than that of the corresponding 2D MXene Ti3C2, which is a promising photothermal material. The Bader charge is higher in magnitude than the Mulliken and Hirschfeld charges. The highest charge transfer occurs in Zr3SnC2 and the lowest charge transfer occurs in Ti3SnC2. ELF reveals that the bonds between carbon and metal ions are strongly localized, whereas in the case of Sn and metal ions, there is less localization which is interpreted as a weak bond.
Τίτλος πηγής δημοσίευσης:	ACS omega
Τόμος/Κεφάλαιο:	8
Τεύχος:	28
Σελίδες:	9
Θεματική Κατηγορία:	[EL] Χημεία[EN] Chemistry [EL] Χημική τεχνολογία[EN] Chemical technolgy [EL] Χημική μηχανική[EN] Chemical engineering
Λέξεις-Κλειδιά:	Electrical energy Energy Insulators Optical properties Polarization
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://pubs.acs.org/doi/10.1021/acsomega.3c03645
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο