Open AccessFree-Floating 2D Nanosheets with a Superlattice Assembled from Fe3O4 Nanoparticles for Peroxidase-Mimicking Activity
Author(s) -
Ren Cai,
Dan Yang,
Liang Yan,
Feng Tian,
Jichao Zhang,
Yifan Lyu,
Kangfu Chen,
Chengyi Hong,
Xigao Chen,
Yuliang Zhao,
Zhuo Chen,
Weihong Tan
Publication year - 2018
Publication title -
acs applied nano materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.227
H-Index - 29
ISSN - 2574-0970
DOI - 10.1021/acsanm.8b01380
Subject(s) - dimethylformamide , nanoparticle , superlattice , dimethyl sulfoxide , catalysis , reactivity (psychology) , ligand (biochemistry) , materials science , self assembly , nanotechnology , chemical engineering , toluene , chemistry , solvent , organic chemistry , medicine , biochemistry , alternative medicine , receptor , optoelectronics , pathology , engineering
The organization of nanoparticles (NPs) with controlled chemical composition and size distribution into well-defined sheets will find many practical applications, but the chemistry remains problematic. Therefore, we report a facile method to assemble NPs to free-floating two-dimensional (2D) nanosheets with a superlattice and thicknesses reaching 22.8 nm. The ligand oleic acid is critical in the formation of nanosheets. As assembled, these free-floating 2D nanosheets remain intact in both polar and nonpolar solvents, e.g., deionized water, ethanol, N,N -dimethylformamide, dimethyl sulfoxide, toluene, hexane, and chloroform, without any disassembly. Compared to Fe 3 O 4 NP building blocks, these 2D nanosheets show more favorable catalytic properties and enhanced catalytic reactivity, which can be exploited to mimic natural enzymes. Our work is expected to open up a new avenue for synthesizing free-floating 2D supersheets by NP assembly, leading to a new generation of materials with enriched functions and broader applications.