Article
Chemistry, Multidisciplinary
Jianfeng Xiao, Jiuzhou Zhao, Guanjiang Liu, Mattew Thomas Cole, Shenghan Zhou, Ke Chen, Xinchuan Liu, Zhenjun Li, Chi Li, Qing Dai
Summary: The study successfully demonstrates the fabrication of well-aligned, vertically orientated SiC nanoarrays using reactive ion etching. The resulting nanoarrays exhibit high geometry uniformity and excellent field emission performance, showing potential for various vacuum electronics applications.
Article
Chemistry, Inorganic & Nuclear
Aya Gomaa Abdelkader Mohamed, Xiang Zhang, Yaobing Wang
Summary: SiC nanowire arrays were successfully synthesized using a simple and cost-effective method, showing potential for photoelectrocatalytic oxygen evolution reaction. The research provides new possibilities for practical applications of SiC-based nanostructures in the field of photoelectrochemistry.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Jin Hyuck Heo, Fei Zhang, Jin Kyoung Park, Hyong Joon Lee, David Sunghwan Lee, Su Jeong Heo, Joseph M. Luther, Joseph J. Berry, Kai Zhu, Sang Hyuk Im
Summary: Surface engineering of the CsPbI3 layer with oxidized Ti3C2Tx MXene nanoplates via spray coatings resulted in highly efficient and stable p-i-n-structured CsPbI3 perovskite solar cells. The addition of OMXene provided a physical barrier against moisture and improved charge separation at the perovskite-electron transporting layer interface, leading to the demonstration of efficient CsPbI3/OMXene-based p-i-n devices with good stability.
Article
Chemistry, Physical
Jing Du, Runliang Zhu, Qingze Chen, Jieyang Xie, Haiyang Xian, Junping Zhang, Jianxi Zhu
Summary: A mechanically stable silicon carbide-reinforced silicon (Si/SiC) material was designed through a facile molten salt-assisted magnesiothermic reduction method to prevent fractures of electrode materials in lithium-ion batteries (LIBs). Si/SiC showed enhanced cycling performance due to the incorporation of SiC nanoparticles, a robust interface structure, and a hierarchical pore structure. When paired with LiCoO2 cathode, the full cell exhibited a high capacity of 148mAh/g after 100 cycles at 0.5C.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Dongxu Cheng, Yihe Huang, Yudong Peng, Bin Wang, Wei Guo, Zhu Liu, Lin Li
Summary: In this study, a three-dimensional (3D) C-Si-SiC micro/nanoporous composite Li-ion battery (LIB) electrode was synthesized using a continuous-wave fiber laser on a copper foil from pure SiC powder. The volcano and fishnet structure electrodes exhibited higher reversible charge capacities and cycling performance. The results suggest that this method can improve the performance of SiC electrodes.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Meng Liu, Songtai Liang, Dongfang Shi, Siyuan Yang, Yu Lei, Tie Li, Yuelin Wang
Summary: Nanoscale air/vacuum channel devices show great potential in extreme environments, high speed, and low power consumption, but achieving stable large current emission at low voltages remains challenging. A vertical structure with controlled emission currents and fast rise/fall times has been demonstrated, providing good manufacturing and integration possibilities for future nanoscale air/vacuum channel electronics.
Article
Chemistry, Multidisciplinary
Jing-Xin Jian, Valdas Jokubavicius, Mikael Syvajarvi, Rositsa Yakimova, Jianwu Sun
Summary: Cubic silicon carbide (3C-SiC) shows promise as a photoelectrode material for solar water splitting due to its small band gap and ideal energy band positions, but typically experiences reduced photocurrent despite the presence of various oxygen-evolution-reaction (OER) cocatalysts.
Article
Chemistry, Applied
Alexander S. Grashchenko, Sergey A. Kukushkin, Andrey V. Osipov, Alexey V. Redkov
Summary: A modified technique for growing silicon carbide from silicon by self-consistent substitution of atoms is proposed, which enables a significant increase in the achievable thickness of the silicon carbide layer. The technique includes a surface treatment step to promote the separation of silicon carbide from the silicon substrate.
Article
Chemistry, Inorganic & Nuclear
Zurong Liao, Chaojie Li, Jiyou Zhong, Yang Li, Weiren Zhao
Summary: A high-performance Cr3+-activated garnet Ln(3)ScInGa(3)O(12):Cr3+ phosphor with emission peak ranging from 726 to 822 nm has been developed, possessing high quantum efficiency, absorption efficiency, and thermal stability. The optimized phosphor coated on a 455 nm LED chip can generate broadband near-infrared (NIR) emission.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Chemical
Yu Sun, Quanji Zhu, Guanghui Li, Bo Peng, Guoling Ruan, Baotian Shan, Jia Xu
Summary: In this study, a pH-stable nanofiltration (NF) membrane embedding amino-modified silicon carbide (NH2-SiC) nanoparticles was prepared. The membrane showed excellent acid-resistance and alkali-resistance without sacrificing separation performance. The NH2-SiC nanoparticles were chemically bonded with the membrane matrix to prevent agglomeration. The modified membrane exhibited improved pure water permeability and stable Na2SO4 rejection. It also showed long-term resistance to acid and alkali solution soaking compared to the original NF membrane.
Article
Chemistry, Physical
Ankita Chandra, Shrabani Ghosh, Bikram Kumar Das, Suvra Pal, Supratim Maity, Biswajit Das, Sourav Sarkar, K. K. Chattopadhyay
Summary: Grass-like tapered silicon nanowires were synthesized through metal assisted chemical etching process at 60°C temperature for 40 (SiNW40), 60 (SiNW60) and 80 minutes (SiNW80) to determine the optimal etching time for efficient field emission. It was found that 60 minutes of HF etching yielded the lowest turn-on field for silicon nanowires, while SiNW80 required higher turn-on field despite having a high current density. This was attributed to the tip bundling effect of SiNW80. To achieve low turn-on field and high current density, SiNW80 was wrapped with rGO, resulting in a turn-on field of 0.12 V/μm and the highest current density. Wettability study was conducted to analyze surface roughness properties related to field emission. Additionally, ANSYS simulation validated the field emission properties and computational analysis revealed a reduction in work function from SiNW80 to rGO-SiNW80.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Faraz Ahmed Inam, Stefania Castelletto
Summary: An unresolved challenge in developing quantum technologies based on color centres in high refractive index semiconductors is the efficient fluorescence enhancement of point defects in bulk materials. In this work, the authors optimize the design of a metal-dielectric nanopillar-based antenna/resonator fabricated in a silicon carbide (SiC) substrate with integrated quantum emitters. The fluorescence collected photon rate enhancement for solid state vacancy-centers in SiC is calculated in these metal-dielectric nanopillar resonators.
Article
Chemistry, Multidisciplinary
Benjamin Rudolph, Anastasios I. Tsiotsias, Benedikt Ehrhardt, Paolo Dolcet, Silvia Gross, Sylvio Haas, Nikolaos D. Charisou, Maria A. Goula, Simone Mascotto
Summary: Nanoporosity is advantageous for the performance of heterogeneous catalysts. This study focuses on the exsolution of Ni nanoparticles from nanoporous perovskite oxides and demonstrates their effective application in biogas dry reforming. The nanoporous exsolved catalysts exhibit higher activity, stability, and regenerability compared to commercial Ni/Al2O3 catalyst.
Article
Chemistry, Physical
Yuanyuan Li, Xiaoyu Liu, Tianyuan Liang, Jiyang Fan
Summary: The surface of SiC quantum dots is a complex two-dimensional system with abundant surface reconstruction and passivation, affecting their chemistry and photophysics. This study reports the novel yellow fluorescence of colloidal SiC QDs in the quantum confinement regime, which decays much slower compared to previously observed blue-green fluorescence. The calculations show that the yellow fluorescence originates from trapped surface states at the Si=O bond, providing a better understanding of the surface properties of SiC QDs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Benjamin E. Grossman-Ponemon, Ataollah Mesgarnejad, Alain Karma
Summary: Nanoporous silicon, created by liquid-metal-dealloying, exhibits higher capacity and extended cycle lifetimes in lithium-ion batteries. Using phase-field modeling, we investigate the elastoplastic swelling behavior and fracture of these nanoporous particles. Our simulations show that the network topology consisting of ligaments connected by bulbous, sphere-like nodes enhances mechanical stability.
NPJ COMPUTATIONAL MATERIALS
(2023)