Engineering FeCo alloy@N-doped carbon layers by directly pyrolyzing Prussian blue analogue: new peroxidase mimetic for chemiluminescence glucose biosensing

Lu, Yuwan; Zhang, Xiaodan; Mao, Xuanxiang; Huang, Yuming

doi:10.1039/c9tb00797k

Cited by 49 publications

(25 citation statements)

References 55 publications

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“…In Fig. 3 e, the Fe 2 p spectrum can be decomposed into two peaks of 707.22 eV for Fe 0 2 p 3/2 and 719.97 eV for Fe 0 2 p 1/2 and other two peaks of 711.06 and 724.85 eV for Fe 2+ 2 p 3/2 and 2 p 1/2 , respectively [ 63 , 77 – 79 ]. The bimetal CoFe with multiple valency in Mo 2 N@CoFe@C/CNT sample could result in higher saturation magnetization.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Magnetic Network Constructed by CoFe Nanoparticles Suspended Within “Tubes on Rods” Matrix Toward Enhanced Microwave Absorption

Wang

et al. 2021

Nano-Micro Lett.

137

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Hierarchical magnetic-dielectric composites are promising functional materials with prospective applications in microwave absorption (MA) field. Herein, a three-dimension hierarchical “nanotubes on microrods,” core–shell magnetic metal–carbon composite is rationally constructed for the first time via a fast metal–organic frameworks-based ligand exchange strategy followed by a carbonization treatment with melamine. Abundant magnetic CoFe nanoparticles are embedded within one-dimensional graphitized carbon/carbon nanotubes supported on micro-scale Mo2N rod (Mo2N@CoFe@C/CNT), constructing a special multi-dimension hierarchical MA material. Ligand exchange reaction is found to determine the formation of hierarchical magnetic-dielectric composite, which is assembled by dielectric Mo2N as core and spatially dispersed CoFe nanoparticles within C/CNTs as shell. Mo2N@CoFe@C/CNT composites exhibit superior MA performance with maximum reflection loss of − 53.5 dB at 2 mm thickness and show a broad effective absorption bandwidth of 5.0 GHz. The Mo2N@CoFe@C/CNT composites hold the following advantages: (1) hierarchical core–shell structure offers plentiful of heterojunction interfaces and triggers interfacial polarization, (2) unique electronic migration/hop paths in the graphitized C/CNTs and Mo2N rod facilitate conductive loss, (3) highly dispersed magnetic CoFe nanoparticles within “tubes on rods” matrix build multi-scale magnetic coupling network and reinforce magnetic response capability, confirmed by the off-axis electron holography.

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Section: Resultsmentioning

confidence: 99%

Hierarchical Magnetic Network Constructed by CoFe Nanoparticles Suspended Within “Tubes on Rods” Matrix Toward Enhanced Microwave Absorption

Wang

et al. 2021

Nano-Micro Lett.

137

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“…Aside from the four types of nanozymes mentioned above, other nanomaterials such as CuSe [ 90 ] , WS 2 [ 92 ] , CuS [ 93 ] , and FeCo@carbon [ 94 ] were found to possess excellent peroxidase‐like activity for producing luminescence signals. The Huang group synthesized novel Fe 3+ ‐based metal–organic xerogels (MOXs) that exhibited outstanding performance in the catalysis of luminol CL without H 2 O 2.…”

Section: Nanozymes For Producing Luminescent Productsmentioning

confidence: 99%

Nanozyme‐based luminescence detection

Zhang

Liu

2020

Luminescence

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Nanozymes refer to nanomaterial‐based enzyme mimics. Most nanozyme assays use chromogenic molecules as substrates that can produce an absorbance change in the visible region upon reaction. For certain applications, such as imaging, fluorescence and luminescence signals are required. Fluorescence detection is also advantageous for sensor development due to its low background signal and high sensitivity. A few substrates, such as Amplex Red and luminol, allow luminescence generation with many oxidative nanozymes. In addition, these substrates can work at neutral pH, useful for intracellular applications. In this review, we summarize luminescence signalling‐based nanozyme systems. We begin with the properties of commonly used substrates. A few specific nanozymes are highlighted, including metal nanoparticles, metal oxide nanomaterials, carbon‐based nanomaterials, and metal–organic frameworks. Finally, a few future research opportunities are discussed.

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“…have been reported to enhance CL reactions. [ 15–25 ] Metal nanoclusters (NCs) are composed of several to dozens of metal atoms, and commonly have an ultra‐small size of < 2 nm. [ 26 ] Compared with metal nanoparticles, metal nanoclusters are smaller in size and have a larger specific surface area.…”

Section: Introductionmentioning

confidence: 99%

One‐step synthesis of cationic gold nanoclusters with high catalytic activity on luminol chemiluminescence reaction

et al. 2020

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The present study reports a one‐step synthesis method for the preparation of cationic gold nanoclusters (Au NCs). Polyethyleneimine (PEI), a positively charged hyperbranched polyamine, was selected as the capping reagent. Glutathione showed a synergistic effect on the formation of the small size of cationic Au NCs. The prepared cationic Au NCs have a size less than 2 nm and carry a positive charge in solution with pH less than 11. The cationic PEI–Au NCs‐triggered luminol chemiluminescence (CL) reactions showed slow and intense CL profiles. The maximum CL intensity can be obtained within 10 min and the CL signal maintained almost the same within 30 min. A linear increase of CL intensity was observed in the presence of an increasing concentration of cationic Au NCs ranging from 0.030 μM to 15 μM. The linear response of the cationic Au NCs in the CL reaction and the glow‐type CL profile make the proposed CL reaction have broad application prospects in the field of biological analysis and CL imaging.

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Engineering FeCo alloy@N-doped carbon layers by directly pyrolyzing Prussian blue analogue: new peroxidase mimetic for chemiluminescence glucose biosensing

Abstract: Direct pyrolysis of a Prussian blue analogue produced FeCo@NC with high and stable peroxidase-like activity, which catalyzes luminol oxidation by H2O2 to generate strong CL emission, and this finding results in a new CL biosensor for glucose.

Cited by 49 publications

References 55 publications

Hierarchical Magnetic Network Constructed by CoFe Nanoparticles Suspended Within “Tubes on Rods” Matrix Toward Enhanced Microwave Absorption

Hierarchical Magnetic Network Constructed by CoFe Nanoparticles Suspended Within “Tubes on Rods” Matrix Toward Enhanced Microwave Absorption

Nanozyme‐based luminescence detection

One‐step synthesis of cationic gold nanoclusters with high catalytic activity on luminol chemiluminescence reaction

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