Nanowerk May 3, 2024 Vertically aligned carbon nanotubes (VACNTs) exhibit outstanding mechanical strength, chemical stability, and electrical characteristics; however, their mechanical elasticity and chemical responsiveness are constrained. An international team of researchers (Republic of Korea, China) proposed a strategy to design and apply nanopatterned VACNTs (nVACNTs) based on a nanotransfer printing process to improve atomic penetrability. nVACNTs facilitate atomic penetration, allowing for the more consistent and higher quality deposition of functional materials. It also provides an improved coating of metal catalysts such as gold. The uniform deposition of ceramic layers on the entire surface of nVACNTs strengthens its mechanical resilience. […]
Tag Archives: Nanoprinting
Creating a broadband diffractive graphene orbital angular momentum metalens by laser nanoprinting
Phys.org October 11, 2023 Orbital angular momentum (OAM) generators based on metasurfaces can achieve ultracompact designs. However, they generally have limited working bandwidth and require complex designs and multistep time-consuming fabrication processes. Researchers in Australia designed broadband graphene OAM metalenses with flexibly controlled topological charges using the detour phase method and fabricated using ultrafast laser nanoprinting. The experimental results agreed well with the theoretical predictions, which demonstrated the accuracy of the design method. The broadband graphene OAM metalenses have broad applications in miniaturized and integrated photonic devices enabled by OAM beams… read more. Open Access TECHNICAL ARTICLE
Free-space nanoprinting beyond optical limits to create 4D functional structures
Phys.org October 7, 2023 Femtosecond laser–based technique called two-photon polymerization (TPP) has emerged as a powerful tool for nanofabrication and integrating nanomaterials. However, challenges persist in existing 3D nanoprinting methods, such as slow layer-by-layer printing and limited material options due to laser-matter interactions. An international team of researchers (USA – Purdue University, Germany, UK) has developed free-space nanopainting using an optical force brush (OFB) which enabled precise spatial writing paths, instantaneous adjustment of linewidths and concentrations, and unrestricted resolution beyond optical limits. OFB allowed rapid aggregation and solidification of radicals, resulting in narrower lines at lower polymerization thresholds and enhanced […]