Low-density nanoporous phases of group-III nitrides built from sodalite cage clusters

Literature Information

Publication Date 2013-04-03
DOI 10.1039/C3CP50814E
Impact Factor 3.676
Authors

Zhifeng Liu, Xinqiang Wang, Gaobin Liu, Jian Sui, Xuefang Wang, Hengjiang Zhu, Zhilin Hou


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Abstract

We report a new family of M12N12 (M = Al and Ga) cluster-assembled low-density materials with distinguished structures and properties based on state-of-the-art first-principles calculations. Specifically, the thermodynamic stability of the sodalite cage M12N12, with Th symmetry and a large HOMO–LUMO gap, is firstly proved using a first-principles molecular dynamics (FPMD) study. We consider this novel structure as a building block to construct new cluster-assembled materials. On the basis of the interaction of the cages with each other, eight new low-density nanoporous phases have been characterized, some of which with high stability are even more stable than experimentally synthesized MN phases. The intrinsic higher flexibilities (lower bulk moduli) and porous characteristics (the pore size: from 0.360 to 0.952 nm for AlN, 0.381 to 0.982 nm for GaN) of these phases should make them extremely promising for molecular sieving, gas storage, and particularly, atomic transport, control and purification applications. Furthermore, these new materials can not only retain the structural characteristics of the building block, but also preserve its electronic properties of wide-energy gap, with an indirect or a direct band gap of 1.038–2.640 eV. Our results may be feasible for extending the range of properties and applications of the corresponding MN compound.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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