journal article·2018-10-26Open access

Free-Floating 2D Nanosheets with a Superlattice Assembled from Fe3O4 Nanoparticles for Peroxidase-Mimicking Activity

Ren Cai, Dan Yang, Liang Yan, Feng Tian, Jichao Zhang, Yifan Lyu, Kangfu Chen, Chengyi Hong, Xigao Chen, Yuliang Zhao, Zhuo Chen, Weihong Tan

ACS Applied Nano Materials· Volume 1· Issue 10

Abstract

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 Fe3O4 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.
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Research context

OpenAlex topics: Advanced Nanomaterials in Catalysis · Nanocluster Synthesis and Applications · Advanced biosensing and bioanalysis techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Research at Bio/Nano Interface, Department of Chemistry and Department of Physiology and Functional Genomics, Health Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, Florida 32611-7200, United States

Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Bio Sensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Life Sciences, and Aptamer Engineering Center of Hunan University, Hunan University, Changsha 410082, China

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore

National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100049, China

Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China

Institute of Molecular Medicine, Renji Hospital, School of Medicine and College of Chemistry and Chemical Engineering, Shanghai 6 Jiao Tong University, Shanghai 200240, People’s Republic of China

Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611-6250, United States

Funding

National Cancer Institute · National Natural Science Foundation of China · National Institute of General Medical Sciences · National Science Foundation

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