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Cubic gauche polynitrogen (cg-N) is an attractive high-energy density material. However, high-pressure synthesized cg-N will decompose at low-pressure and cannot exist at ambient conditions. Here, the stabilities of cg-N surfaces with and…

Materials Science · Physics 2024-12-02 Guo Chen , Caoping Niu , Wenming Xia , Jie Zhang , Zhi Zeng , Xianlong Wang

The long sought cubic gauche polymeric nitrogen (cg-N) consisting of N-N single bonds has been synthesized by a simple route using sodium azide as a precursor at ambient conditions. The recrystallization process was designed to expose…

Materials Science · Physics 2024-12-31 Runteng Chen , Jun Zhang , Zelong Wang , Ke Lu , Yi Peng , Jianfa Zhao , Shaomin Feng , Changqing Jin

Cubic gauche nitrogen (cg-N) with a three-dimensional network of N-N single bonds attracted lots of attentions in last decades, since it theoretically has five times larger energy than TNT. While, extreme environments of high pressure or…

Materials Science · Physics 2024-12-02 Tingting Ye , Yuxuan Xu , Guo Chen , Ming Li , Liangfei Wu , Jie Zhang , Junfeng Ding , Xianlong Wang

In this work, the long-sought cg-N with N-N single bond has been synthesized for the first time by a thermal-driven-only chemical route at ambient conditions. The successful synthesis of cg-N was achieved by first creating a solution of…

A high-efficient one-step synthesis of cubic gauche polymeric nitrogen was developed just by thermal treatment of KN3 powders. The Raman and infrared spectra confirm the formation of polymeric nitrogen networks. Thermogravimetric…

Materials Science · Physics 2025-01-03 Liangfei Wu , Yuxuan Xu , Guo Chen , Junfeng Ding , Ming Li , Zhi Zeng , Xianlong Wang

Search of materials with C-N composition hold a great promise in creating materials which would rival diamond in hardness due to the very strong and relatively low-ionic C-N bond. Early experimental and theoretical works on C-N compounds…

The development of reversible hydrogen storage materials has become crucial for enabling carbon-neutral energy systems. Based on this, the present work investigates the hydrogen storage on the sodium-decorated P-C$_3$N (Na@P-C$_3$N), a…

To contemplate an alternative approach for the minimization of diffusion at high temperature depositions, present findings impart viability of room-temperature deposited reactively sputtered ScN thin film samples. The adopted room…

Cubic zinc oxide (rs-ZnO), metastable under normal conditions, was synthesized from the wurtzite modification (w-ZnO) at 7.7 GPa and ~800 K in the form of nanoparticles isolated in the NaCl matrix. The phase transition rs-ZnO \rightarrow…

Materials Science · Physics 2011-02-09 P. S. Sokolov , A. N. Baranov , Zh. V. Dobrokhotova , V. L. Solozhenko

The pressure-induced metallic states of light elements attract significant attention, because of potential applications as high-temperature superconductor and high-energy-density material, especially for hydrogen and nitrogen1-10. Several…

Materials Science · Physics 2026-03-04 Kewei Ding , Junyi Miao , Ying Liu , Anxin Yu , Cheng Lu , Wenrui Zhang , Yanchun Li , Haipeng Su , Zhongxue Ge , Xianlong Wang

Hydrides are considered to be one of the most promising families of compounds for achieving high temperature superconductivity. However, there are very few experimental reports of ambient-pressure hydride superconductivity, and the…

Superconductivity · Physics 2026-03-18 Antonio Sanna , Tiago F. T. Cerqueira , Ekin Dogus Cubuk , Ion Errea , Yue-Wen Fang

In this research, the ambient cured one part alkali activated material (AAM) containing graphene nanoplatelets (GNPs), fly ash, slag and silica fume has been investigated after high temperature exposure to 200 to 800oC. Their compressive…

Materials Science · Physics 2024-02-22 Nghia Tran , Tuan Nguyen , Jay Black , Tuan Ngo

Nitrogen oxides are textbook class of molecular compounds, with extensive industrial applications. Nitrogen and oxygen are also among the most abundant elements in the universe. We explore the N-O system at 0 K and up to 500 GPa though ab…

Materials Science · Physics 2015-06-30 Dongxu Li , Artem R. Oganov , Xiao Dong , Xiang-Feng Zhou , Qiang Zhu , Guangrui Qian , Huafeng Dong

Black phosphorus nitrogen (BP-N) is an attractive high-energy-density material. However, high-pressure synthesized BP-N will decompose at low-pressure and cannot be quenched to ambient conditions. Finding a method to stabilize it at 0 GPa…

Materials Science · Physics 2025-01-03 Guo Chen , Chengfeng Zhang , Yuanqin Zhu , Bingqing cao , Jie Zhang , Xianlong Wang

Nitrogen hydrides, including ammonia (NH3), hydrazine (N2H4), hydrazoic acid (HN3) and etc, are compounds of great fundamental and applied importance. Their high-pressure behavior is important because of their abundance in giant planets and…

Materials Science · Physics 2016-04-26 Guang-Rui Qian , Haiyang Niu , Chao-Hao Hu , Artem R. Oganov , Qingfeng Zeng , Huai-Ying Zhou

The current search for room-temperature superconductivity is inspired by the unique properties of the electron-phonon interaction in metal superhydrides. Encouraged by the recently found highest-$T_C$ superconductor fcc-$LaH_{10}$, here we…

Carbon monoxide and nitrogen are among the potentially interesting high-energy density materials. However, in spite of the physical similarities of the molecules, they behave very differently at high pressures. Using density functional…

Materials Science · Physics 2013-12-06 Zamaan Raza , Chris J. Pickard , Carlos Pinilla , A. Marco Saitta

We have studied conductance characteristics of mechanically fabricated Ni nanoconstrictions under controlling electrochemical potential and pH of the electrolyte. Conductance histogram showed clear feature peaked at 1-1.5 $G_{0}$…

Materials Science · Physics 2009-11-11 Manabu Kiguchi , Tatsuya Konishi , Kei Murakoshi

Conjugated polymeric g-C$_3$N$_4$ has emerged as a leading semiconductor for solar-to-chemical energy conversion due to its unique electronic band structure, robust physicochemical stability, and environmental benignity. However, defect…

Materials Science · Physics 2025-07-28 Xiaochun Gao , Shaoqi Hou , Dawei Su

Catalyst-free vertically aligned graphene nanoflakes possessing a large amount of high density edge planes were functionalized using nitrogen species in a low energy N+ ion bombardment process to achieve pyridinic, cyanide and nitrogen…

Materials Science · Physics 2012-05-15 Ajay Kumar , Abhijit Ganguly , Pagona Papakonstantinou
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