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The synthesis of Ni filled multiwalled carbon nanotubes was performed by atmospheric pressure chemical vapor deposition with propane on Si at 850 C using a simple mixture of Ni(salen), and a conventional photoresist. Analysis of the carbon…

Applied Physics · Physics 2019-08-14 Joydip Sengupta , Avijit Jana , N D Pradeep Singh , C Mitra , Chacko Jacob

A simple and most promising oxide-assisted catalyst-free method is used to prepare silicon nitride nanowires that give rise to high yield in a short time. After a brief analysis of the state of the art, we reveal the crucial role played by…

Materials Science · Physics 2008-11-24 J. Farjas , C. Rath , A. Pinyol , P. Roura , E. Bertran

Using ab initio evolutionary simulations, we predict the existence of five novel stable Li-N compounds at pressures from 0 to 100 GPa (Li13N, Li5N, Li3N2, LiN2, and LiN5). Structures of these compounds contain of isolated N ions, N2 dimers,…

Materials Science · Physics 2015-04-28 Yanqing Shen , Artem R. Oganov , Guangri Qian , Huafeng Dong , Qiang Zhu , Zhongxiang Zhou

A combinatorial thin-film synthesis approach combined with a high throughput analysis methodology was successfully applied to synthesize TiN/Ni coatings with optimum mechanical properties. The synthesis approach consists of the deposition…

The development of multifunctional solid-state materials is key to advancing lithium-ion batteries with enhanced safety and simplified architectures. Here, we report a scalable, highly efficient (near $100\%$), solvent-free mechanochemical…

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

We present a fast method to fabricate high quality heterostructure devices by picking up crystals of arbitrary sizes. Bilayer graphene is encapsulated with hexagonal boron nitride to demonstrate this approach, showing good electronic…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 P. J. Zomer , M. H. D. Guimarães , J. C. Brant , N. Tombros , B. J. van Wees

The synthesis of Si3N4 nanowires from the reaction of silicon nanoparticles with N2 in the 1200-1440 C temperature range is reported. The nitridation conditions are such that the reaction with nitrogen is favoured by the presence of silicon…

Materials Science · Physics 2008-11-24 J. Farjas , A. Pinyol , Chandana Rath , P. Roura , E. Bertran

Wurtzite Boron Nitride ($w$BN) is a wide band gap BN polymorph with peculiar mechanical properties (hardness and stiffness). After its first synthesis in 1963 as a transformation of hexagonal BN ($h$BN) under high temperature and pressure…

Materials Science · Physics 2023-05-31 Martino Silvetti , Claudio Attaccalite , Elena Cannuccia

InGaN-based visible LEDs find commercial applications for solid-state lighting and displays, but lattice mismatch limits the thickness of InGaN quantum wells that can be grown on GaN with high crystalline quality. Since narrower wells…

Materials Science · Physics 2019-02-08 Logan Williams , Emmanouil Kioupakis

Computationally guided high-throughput synthesis is used to explore the Zn-V-N phase space, resulting in the synthesis of a novel ternary nitride Zn$_2$VN$_3$. Following a combinatorial PVD screening, we isolate the phase and synthesize…

Niobium nitride (NbN) is a useful material for fabricating detectors because of its high critical temperature and relatively high kinetic inductance. In particular, NbN can be used to fabricate nanowire detectors and mm-wave transmission…

Instrumentation and Detectors · Physics 2020-02-03 Calder Sheagren , Peter Barry , Erik Shirokoff , Qing Yang Tang

Hexagonal boron nitride (h-BN) has attracted significant attention due to its superior properties as well as its potential as an ideal dielectric layer for graphene-based devices. The h-BN films obtained via chemical vapor deposition in…

Materials Science · Physics 2015-03-11 Guangyuan Lu , Tianru Wu , Qinghong Yuan , Huishan Wang , Haomin Wang , Feng Ding , Xiaoming Xie , Mianheng Jiang

The synthesis of ternary nitrides is uniquely difficult, in large part because elemental N$_2$ is relatively inert. However, lithium reacts readily with other metals and N$_2$, making Li-M-N the most numerous sub-set of ternary nitrides.…

We report the interplay between In incorporation and strain relaxation kinetics in high-In-content InxGa1-xN (x = 0.3) layers grown by plasma-assisted molecular-beam epitaxy. For In mole fractions x = 0.13-0.48, best structural and…

Tungstite (WO3.H2O) nanoparticles were synthesized using a simple and inexpensive low temperature and low pressure hydrothermal method by adding hydrochloric acid to diluted sodium tungstate solutions (Na2WO4.2H2O) at temperatures below…

Materials Science · Physics 2017-05-24 Majid Ahmadi , Reza Younesi , Maxime J-F Guinel

We report on picosecond UV-laser processing of hexagonal boron nitride (hBN) at moderately high pressures above 500 bar. The main effect is specific to the ambient gas and laser pulse duration in the ablation regime: when samples are…

The application of high pressure can fundamentally modify the crystalline and electronic structures of elements as well as their chemical reactivity, which could lead to the formation of novel materials. Here, we explore the reactivity of…

Chemical Physics · Physics 2017-05-12 Yang-Mei Chen , Hua Y. Geng , Xiao-Zhen Yan , Zi-Wei Wang , Xiang-Rong Chen , Qiang Wu

Nitrides in many ways are fascinating since they often appear as superconductors, high energy density and hard materials. Though there exist a large variety of nitrides, noble gas nitrides are long missing in nature. Pursuit of noble gas…

Materials Science · Physics 2015-09-16 Feng Peng , Yanchao Wang , Hui Wang , Yunwei Zhang , Yanming Ma

Bulk solid state synthesis of nitride materials usually leads to thermodynamically stable, cation-ordered crystal structures, whereas thin film synthesis tends to favor disordered, metastable phases. This dichotomy is inconvenient both for…