Sub-5 nm Porous Nanocrystals: Interfacial Site-Directed Growth on Graphene for Efficient Biocatalysis

Biao Kong, Xiaotian Sun, Cordelia Selomulya, Jing Tang, Gengfeng Zheng, Yingqing Wang, Dongyuan Zhao

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The direct production of macromolecular scale (sub-5 nm) porous nanocrystals with high surface area has been a considerable challenge over the past two decades. Here we report an interfacial site-directed capping agent-free growth method to directly produce porous ultrasmall (sub-5 nm), fully crystalline, macromolecular scale nanocrystals. The porous sub-5 nm Prussian blue nanocrystals exhibit uniform sizes (∼4 ± 1 nm), high surface area (∼855 m2 g-1), fast electron transfer (rate constant of ∼9.73 s-1), and outstanding sustained catalytic activity (more than 450 days). The nanocrystal-based biointerfaces enable unprecedented sub-nanomolar level recognition of hydrogen peroxide (∼0.5 nM limit of detection). This method also paves the way towards the creation of ultrasmall porous nanocrystals for efficient biocatalysis.

Original languageEnglish
Pages (from-to)4029-4034
Number of pages6
JournalChemical Science
Volume6
Issue number7
DOIs
Publication statusPublished - 2015

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    Kong, B., Sun, X., Selomulya, C., Tang, J., Zheng, G., Wang, Y., & Zhao, D. (2015). Sub-5 nm Porous Nanocrystals: Interfacial Site-Directed Growth on Graphene for Efficient Biocatalysis. Chemical Science, 6(7), 4029-4034. https://doi.org/10.1039/c5sc00819k