Kong Biao, Sun Xiaotian, Selomulya Cordelia, Tang Jing, Zheng Gengfeng, Wang Yingqing, Zhao Dongyuan
Department of Chemistry , Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) , Laboratory of Advanced Materials , Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Fudan University , Shanghai 200433 , P. R. China . Email:
Department of Chemical Engineering , Monash University , Clayton , VIC 3800 , Australia.
Chem Sci. 2015 Jul 15;6(7):4029-4034. doi: 10.1039/c5sc00819k. Epub 2015 Apr 14.
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 m g), fast electron transfer (rate constant of ∼9.73 s), 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.
在过去二十年中，直接生产具有高表面积的大分子尺度（小于5纳米）多孔纳米晶体一直是一项巨大的挑战。在此，我们报告一种界面位点定向无封端剂生长方法，可直接生产多孔超小（小于5纳米）、完全结晶的大分子尺度纳米晶体。多孔的小于5纳米普鲁士蓝纳米晶体具有均匀的尺寸（约4±1纳米）、高表面积（约855平方米/克）、快速电子转移（速率常数约为9.73秒⁻¹）以及出色的持续催化活性（超过450天）。基于纳米晶体的生物界面实现了对过氧化氢前所未有的亚纳摩尔水平识别（检测限约为0.5纳摩尔）。该方法还为创建用于高效生物催化的超小多孔纳米晶体铺平了道路。
