scholarly journals Synthetic accessibility and stability rules of NASICONs

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bin Ouyang ◽  
Jingyang Wang ◽  
Tanjin He ◽  
Christopher J. Bartel ◽  
Haoyan Huo ◽  
...  

AbstractIn this paper we develop the stability rules for NASICON-structured materials, as an example of compounds with complex bond topology and composition. By first-principles high-throughput computation of 3881 potential NASICON phases, we have developed guiding stability rules of NASICON and validated the ab initio predictive capability through the synthesis of six attempted materials, five of which were successful. A simple two-dimensional descriptor for predicting NASICON stability was extracted with sure independence screening and machine learned ranking, which classifies NASICON phases in terms of their synthetic accessibility. This machine-learned tolerance factor is based on the Na content, elemental radii and electronegativities, and the Madelung energy and can offer reasonable accuracy for separating stable and unstable NASICONs. This work will not only provide tools to understand the synthetic accessibility of NASICON-type materials, but also demonstrates an efficient paradigm for discovering new materials with complicated composition and atomic structure.

Nanoscale ◽  
2022 ◽  
Author(s):  
Zishuang Cheng ◽  
Xiaoming Zhang ◽  
Hui Zhang ◽  
Heyan Liu ◽  
Xiao Yu ◽  
...  

Since the discovery of penta-graphene, two-dimensional (2-D) pentagonal-structured materials have been highly expected for desirable performance because of their unique structures and accompanied physical properties. Hence, based on the first-principles...


Author(s):  
Huabing Shu

Semiconducting two-dimensional Janus materials have drawn increasing attention for the novel optoelectronic properties. Here, employing first-principles calculations, we systematically explore the stability, electronic and optical properties of Janus diamane C4FCl....


2018 ◽  
Vol 6 (30) ◽  
pp. 14949-14955 ◽  
Author(s):  
Yi Yang ◽  
Fei Gao ◽  
Shiwu Gao ◽  
Su-Huai Wei

The calculated formation energies indicate that CsBr(MAI)-terminated 2D perovskites are more stable than PbBr2(PbI2)-terminated 2D structures and an MAI-terminated monolayer could be even more stable than an MAPbI3 bulk.


2021 ◽  
Vol 2108 (1) ◽  
pp. 012082
Author(s):  
Cuicui Sun ◽  
Mengmeng Liu

Abstract Since the discovery of graphene, two-dimensional materials have quickly won widespread attention in the academic community. Borene is a two-dimensional isomer of boron and the lightest element Dirac material. It becomes the latest and promising two-dimensional material due to its unique structure and electronic properties. In the periodic table, B is a close neighbor of C and has a certain similarity with C. It can also form a hexagonal honeycomb structure. An additional B atom is added to the center of the ring to form a triangular lattice borene. The triangular borene has surplus electrons and belongs to a multi-electron state, which is equivalent to a metastable structure. In this paper, the first principles are used to study the F functionalized modification of the triangular borene. The aim is to transfer the surplus electrons in the system, and probe its structural stability and electronic structure characteristics. The study found that functional modification significantly improved the stability of borene. This can provide feasible ideas and practical guidance for the experimental synthesis of stable boronene.


2016 ◽  
Vol 18 (36) ◽  
pp. 25401-25408 ◽  
Author(s):  
R. Longuinhos ◽  
J. Ribeiro-Soares

By using symmetry arguments and first principles calculations, we study the stability of β and ε few-layer GaSe and their low-frequency interlayer breathing and shear modes, unveiling uncommon lubricant properties and exfoliability at the nanoscale.


Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 789 ◽  
Author(s):  
Fangfang Wang ◽  
Liyu Zhou ◽  
Zhen Ma ◽  
Mingxue He ◽  
Fang Wu ◽  
...  

The absence of magnetic moments in pristine two-dimensional (2D) semiconducting materials has attracted many research interests. Transition-metal (TM) decoration has been found to be an effective strategy to introduce magnetic moments in non-magnetic 2D semiconductors. However, the stability of TM atoms modified 2D semiconductors has not been well explored. Here, taking 2D Tin (II) sulfide (SnS) monolayer as a prototype, we explored the stability of magnetic semiconductors through this method. In our studies, all possible configurations of TM decoration have been considered, namely, adsorption on the intact surface, S vacancy, and Sn vacancy. Based on the energy gain and electronic analysis, our results revealed that most of the TM atoms will form a cluster, and only several TM atoms can be effectively doped into the SnS monolayer. Furthermore, the band calculations showed that only Mn substitution will give rise to a magnetic semiconductor. Thus, the reported results here provide some hidden information for further realization of the magnetic semiconductors and serve as a paradigm to prepare 2D magnetic semiconductors.


2021 ◽  
Vol 3 (7) ◽  
pp. 1934-1941
Author(s):  
Rina Ibragimova ◽  
Zhong-Peng Lv ◽  
Hannu-Pekka Komsa

Interactions between two-dimensional MXene sheets and electron beams of a (scanning) transmission electron microscope are studied by first-principles calculations.


2017 ◽  
Author(s):  
Lyudmyla Adamska ◽  
Sridhar Sadasivam ◽  
Jonathan J. Foley ◽  
Pierre Darancet ◽  
Sahar Sharifzadeh

Two-dimensional boron is promising as a tunable monolayer metal for nano-optoelectronics. We study the optoelectronic properties of two likely allotropes of two-dimensional boron using first-principles density functional theory and many-body perturbation theory. We find that both systems are anisotropic metals, with strong energy- and thickness-dependent optical transparency and a weak (<1%) absorbance in the visible range. Additionally, using state-of-the-art methods for the description of the electron-phonon and electron-electron interactions, we show that the electrical conductivity is limited by electron-phonon interactions. Our results indicate that both structures are suitable as a transparent electrode.


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