Premium
Carbon Vesicles: A Symmetry‐Breaking Strategy for Wide‐Band and Solvent‐Processable Ultrablack Coating Materials
Author(s) -
Guo Jing,
Li Dongdong,
Qian Zhenchao,
Luo Heng,
Yang Meng,
Wang Qianxiang,
Xu Jian,
Zhao Ning
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201909877
Subject(s) - materials science , solvent , carbonization , coating , absorption (acoustics) , porosity , carbon fibers , chemical engineering , nanoparticle , resorcinol , particle (ecology) , structural coloration , fabrication , layer (electronics) , composite material , nanotechnology , optoelectronics , organic chemistry , scanning electron microscope , photonic crystal , composite number , medicine , chemistry , alternative medicine , pathology , engineering , oceanography , geology
Solvent‐processable ultrablack materials have obvious application convenience in many situations, such as absorbing coatings on large and complex surfaces. However, developing solvent‐processable ultrablack materials with high light‐absorption performance and wide absorption band remains a great challenge. In this article, carbon vesicles (CVs) are fabricated for solvent‐processable ultrablack coating. The fabrication process involves a templated co‐condensation of silica and resorcinol formaldehyde resin (RF resin), followed by carbonization and template removal. The resultant structure shows a very thin inner layer, a rough outer layer, as well as a nano‐porous interlayer. This structure introduces randomness and breaks the spherical symmetry of the common carbon hollow spheres. As a result, structural color due to inner‐particle interference is avoided. In addition, the as‐fabricated CVs show a wide‐band low reflectance because of its low carbon filling ratio and nanoscale scatterer size. The lowest reflectance reaches ≈0.10% at 360 nm, making it the darkest solvent‐processable ultrablack material ever reported. The symmetry‐breaking strategy presented here provides an efficient way for the design of solvent‐processable ultrablack materials.