Graphene, a two-dimensional material made up of carbon atoms arranged in a hexagonal lattice, has attracted significant attention due to its remarkable properties. It exhibits exceptional thermal conductivity, ultra-low electrical resistivity, and rapid electron mobility, making it a promising candidate for next-generation electronic devices such as transistors, transparent touchscreens, and light-emitting panels. However, one major limitation of graphene is its semi-metallic nature, with an energy gap of 0 eV. This makes it unsuitable for applications like thermoelectric materials or solar cells, where a bandgap is essential. To overcome this, researchers have been exploring ways to modify graphene's structure or introduce dopants to widen its energy gap, aiming to expand its use in optoelectronic devices. Despite growing interest in carbon- and silicon-based two-dimensional nanomaterials, no material with a moderate bandgap (1–2 eV) that is independent of chirality or size has been reported so far. Recently, a team led by Wu Liming, a research fellow at the National Key Laboratory of Structural Chemistry at the Fujian Institute of Materials Science, Chinese Academy of Sciences, made a breakthrough. Supported by projects from the National Natural Science Foundation of China, they combined global particle swarm optimization with first-principles calculations to predict a new two-dimensional material: sp²-hybridized silicon carbon graphene (g-SiC₂) with an energy gap of 1.09 eV. This material shows great potential for future electronic and optoelectronic applications. The g-SiC₂ structure consists of silicon and carbon atoms bonded in a stable, planar configuration with a binding energy of 0.41 eV per atom. It represents the lowest point on the potential energy surface, outperforming the known isomer pt-SiC₂, which contains sp³ hybridized silicon atoms. The predicted melting point of g-SiC₂ is between 3000 and 3500 K, and the energy gap of its nanotube derivatives remains consistent regardless of chirality or size. These findings suggest that g-SiC₂ could be a highly stable and versatile material for advanced nanotechnology. This groundbreaking study was published in the journal *Nano Letters* and offers a crucial theoretical foundation for the design and band engineering of two-dimensional carbon-based nanomaterials. It opens up new possibilities for developing materials with tailored electronic properties, paving the way for next-generation electronics and energy technologies. Binocular People Counter,Footfall Counter Wide-Angle For Retail Chain Store,Binocular Visitor Counter Wide-Angle For Retail Store,Binocular Footfall Counter For Grocery Store OP Retail (Suzhou) Technology Co., Ltd , https://www.opretailtech.com
Research progress on the theory of silicon carbon graphene from Fujian Institute of Materials Science and Technology