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Sub-5 nm porous nanocrystals: interfacial site-directed growth on graphene for efficient biocatalysis.

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.

SUBMITTER: Kong B

PROVIDER: S-EPMC5497271 | biostudies-other | 2015 Jul

REPOSITORIES: biostudies-other

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Sub-5 nm porous nanocrystals: interfacial site-directed growth on graphene for efficient biocatalysis.

Kong Biao B Sun Xiaotian X Selomulya Cordelia C Tang Jing J Zheng Gengfeng G Wang Yingqing Y Zhao Dongyuan D

Chemical science 20150414 7

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 transfe ...[more]

PMID: 28717465

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