Vertical graphene nanowalls (VGNWs) are a promising class of nanomaterials with exceptional properties, including high specific surface area, excellent electrical conductivity, scalability, and compatibility with transition metal compounds. These attributes position VGNWs as a compelling choice for various applications, such as energy storage, catalysis, and sensing. Plasma-enhanced chemical vapor deposition (PECVD) is a versatile technique for synthesizing large-scale VGNWs on diverse substrates. However, a comprehensive understanding of the underlying physicochemical mechanisms that govern VGNW growth remains elusive. This review aims to fill the knowledge gaps by investigating VGNW nucleation and growth using PECVD, with a focus on the impact of the temperature on the growth ratio and nucleation density across a broad temperature range.
New tunable metasurface can act as axicon or metalens, with potential applications in biological imaging, microscopic measurement, laser fabrication, optical manipulation, multi-plane imaging, depth estimation, and optical data storage. The metasurface is made of titanium dioxide (TiO2) and can be actuated by rotating it between two layers. When light is incident on the metasurface, the […]
Researchers have developed a new type of laser that uses calcium carbonate nanoparticles to generate pulses of light at two different wavelengths. The laser is compact, stable, and has a wide range of pulse repetition rates and pulse widths, making it a promising candidate for portable laser applications. The laser was developed by a team […]
Quantum biological tunneling is a phenomenon where particles can cross barriers that would normally be impassable. This phenomenon plays a role in many essential life functions, such as cellular respiration and homeostasis. Scientists are now exploring the potential of quantum biological tunneling to develop new cancer treatments. One promising approach is to use bio nanoantennae, […]