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

Chemical Science Pub Date: 2015-04-14 DOI: 10.1039/C5SC00819K

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.

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