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

Abstract

An interfacial site-directed, capping-agent-free growth method for direct production of macromolecular scale (sub-5 nm) porous nanocrystals that are fully crystalline with a high surface area were developed for efficient biocatalysis.

New faces of porous Prussian blue: interfacial assembly of integrated hetero-structures for sensing applications

“…15 This approach adds to the synthesis toolbox of nanocrystals and mesoporous materials, creating ultrasmall porous nanostructures from the interfacial site-directed growth that are previously impossible to be achieved using traditional approaches. First, the in situ wet-chemical growth route provides a desirable platform for constructing heterointerfaces with improved properties of electron transfer and much enhanced sensitivity.…”

“…179,184 Subsequently, most PB-based biosensors from chemical synthesis for H 2 O 2 have paved an elegant way to detect H 2 O 2 based on various electrodes (e.g., platinum, gold, glassy carbon, and carbon paste). 15,33 Nonetheless, the previous work predominantly utilized PB nanocrystals on flat substrates, and thus only limited crystal faces were exposed to electrolytes, resulting in relatively low electrochemical response for H 2 O 2 from live cells. 15,33 Nonetheless, the previous work predominantly utilized PB nanocrystals on flat substrates, and thus only limited crystal faces were exposed to electrolytes, resulting in relatively low electrochemical response for H 2 O 2 from live cells.…”

“…15, adapted with permission from ref. 15,177 Recently, Zhao and co-workers have reported an unconventional antenna-like heterostructure of PB head/TiO 2 nanowire arm arrays for 3-D interfacial sensing of H 2 O 2 . ) electrode surface.…”

“…3 Despite this long history, the first study of the electrochemical properties of PB was not reported until 1978. [5][6][7][8][9][10][11][12][13][14][15] Furthermore, the PB-based nanodevices have also been investigated intensively for use in self-rechargeable batteries, 14 microbial batteries, 11 electrochromic displays, 16 fuel cells, 17,18 sodium and potassium ion batteries, [19][20][21] and as signal-enhancing nanodevices 15,[22][23][24] due to their superior electrochemical and photoelectrochemical properties. [5][6][7][8][9][10][11][12][13][14][15] Furthermore, the PB-based nanodevices have also been investigated intensively for use in self-rechargeable batteries, 14 microbial batteries, 11 electrochromic displays, 16 fuel cells, 17,18 sodium and potassium ion batteries, [19][20][21] and as signal-enhancing nanodevices 15,[22]…”

“…[5][6][7][8][9][10][11][12][13][14][15] Furthermore, the PB-based nanodevices have also been investigated intensively for use in self-rechargeable batteries, 14 microbial batteries, 11 electrochromic displays, 16 fuel cells, 17,18 sodium and potassium ion batteries, [19][20][21] and as signal-enhancing nanodevices 15,[22][23][24] due to their superior electrochemical and photoelectrochemical properties. 15,[26][27][28] They have been defined as an ''artificial peroxidase'', analogous to the biological family of peroxidase enzymes for the reduction of hydrogen peroxide. 15,[26][27][28] They have been defined as an ''artificial peroxidase'', analogous to the biological family of peroxidase enzymes for the reduction of hydrogen peroxide.…”