An array of poly-l-histidine functionalized multi-walled carbon nanotubes on 4-aminothiophenol self-assembled monolayer and the application for sensitively glucose sensing

Chen, Yuan; Liu, Xiao-Mi; Wu, Xi; Liu, Xuechen; Dong, Wenhao; Han, Bingkai; Du, Xin; Zhang, Cong; Zhang, Yanyan; Wang, Hong-Tao; Chen, Qiang

doi:10.1016/j.electacta.2017.11.150

Cited by 14 publications

(8 citation statements)

References 43 publications

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“…4a, in the positive scan mode, the oxidation peak currents of the His@AuNCs/RGO-GCE electrode for TMB (peaked at 0.33 and 0.53 V) were much higher than for other nanocomposite modified electrodes, indicating the excellent electrocatalytic activity of nanocomposites for the oxidation of TMB, and the His@AuNCs/RGO electrode was the optimal. Accordingly, more efficient electron transfer between the His@AuNCs/RGO and the electrode surfaces could be expected, presumably owing to the synergistic effects of the AuNCs, imidazole group of histidine, and RGO, which promote electron transfer from their catalytic active centers to the electrode surface [48,49]. In the chromogenic reaction of TMB and His@AuNCs/RGO, we observed that the presence of nitrite could inhibit the oxidation of TMB.…”

Section: Colorimetric Detection Of Nitrite By His@auncs/rgomentioning

confidence: 86%

Enhanced His@AuNCs oxidase-like activity by reduced graphene oxide and its application for colorimetric and electrochemical detection of nitrite

Wen-e

et al. 2019

Anal Bioanal Chem

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Enzyme-mimicking (nanozyme)-based biosensors are attractive owing to their unique catalytic efficiency, multifunctionality, and tunable activity, but examples of oxidase-like nanozymes are quite rare. Herein, we demonstrated that histidine-capped gold nanoclusters (His@AuNCs) possessed intrinsic oxidase-like activity, which could directly oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to blue colored ox-TMB without H 2 O 2. The assembly of reduced graphene oxide (RGO) with His@AuNCs could further improve its oxidase-like activity and the His@AuNCs/RGO nanocomposites had a lower Michaelis constant (K m) and higher catalytic constant (K cat) for TMB oxidation. Furthermore, compared to other nanomaterials, the as-prepared His@AuNCs/RGO also exhibited enhanced electrocatalytic activity toward TMB. Interestingly, nitrite inhibited the catalytic (chromogenic) and electrocatalytic processes of His@AuNCs/RGO in the oxidation of TMB. The oxidase-like and electrocatalytic activity of His@AuNCs/RGO was evaluated with nitrite and TMB as substrates, and the results indicated that TMB and nitrite might share the same catalytic active sites. On the basis of these findings, a colorimetric and electrochemical sensor was developed with the His@AuNCs/RGO composite as an oxidase mimic for determination of nitrite with linear ranges of 10-500 μM and 2.5-5700 μM, respectively. The developed method was successfully applied to the detection of nitrites in real samples. The present work suggests that the oxidase-like nanozyme is not only suitable for colorimetric assay but also for development of electrochemical sensors in bioanalysis.

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Section: Colorimetric Detection Of Nitrite By His@auncs/rgomentioning

confidence: 86%

Enhanced His@AuNCs oxidase-like activity by reduced graphene oxide and its application for colorimetric and electrochemical detection of nitrite

Wen-e

et al. 2019

Anal Bioanal Chem

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“…The functionalization of CB not only improve the dispersion property also improve their chemical activity through the carboxyl groups. 25 Moreover, the functionalization allows the modification with other conducting materials through the carboxyl groups for improve the charge transfer property and catalytic activity of the proposed sensor. Recent times, the biopolymers are emerging as excellent electrode materials for the fabrication of different electrochemical sensors.…”

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confidence: 99%

“…36 For instance, the PLH functionalized multi-walled carbon nanotubes for the amperometric detection of glucose was reported. 37 Moreover, Journal of The Electrochemical Society, 165 (10) B422-B430 (2018) B423 the PLH was electropolymerized on glassy carbon electrode for the sensitive voltammetric determination of hydroquinone. 38 A. T. Ezhil Vilian et al reported an amperometric sensor based on PLH modified reduced graphene oxide.…”

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confidence: 99%

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A Simple and Rapid Electrochemical Determination of L-Tryptophan Based on Functionalized Carbon Black/Poly-L-Histidine Nanocomposite

Sakthivel

Mutharani

Chen

et al. 2018

J. Electrochem. Soc.

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In the present work, the functionalized carbon black/poly-l-histidine modified glassy carbon electrode (f-CB/PLH/GCE) was fabricated and applied for the amperometric determination of Try. The proposed modified electrode was prepared by non-hazardous, inexpensive, simple electro polymerization method. The successful formation of f-CB/PLH composite was scrutinized by field-emission scanning electron microscopy, transmission electron microscopy, optical microscope, energy dispersive X-ray spectroscopy, Fourier transform infra-red spectroscopy, Raman spectroscopy and electrochemical impendence spectroscopy. Besides, the electrocatalytic activity of the f-CB/PLH composite was examined by cyclic voltammetry and amperometric techniques. Remarkably, the wide linear range responses from 0.025-124.98 μM with the lowest detection limit 0.008 μM and an appreciable sensitivity of 1.126 μA mM −1 cm −2 was obtained. In addition, f-CB/PLH/GCE exhibits the good selectivity in presence of various inorganic, biological and co-existing interfering compounds. Furthermore, the practical feasibility of the sensor electrode was demonstrated in milk and human urine samples.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 61.220.116.134 Downloaded on 2018-07-12 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 61.220.116.134 Downloaded on 2018-07-12 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 61.220.116.134 Downloaded on 2018-07-12 to IP B428Journal of The Electrochemical Society, 165 (10) B422-B430 (2018) ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 61.220.116.134 Downloaded on 2018-07-12 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see

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“…The chemical modification of MWCNTs and other materials has a direct influence on their physical and chemical properties, which are very important for the electrochemical sensors for biomolecules [14]. A number of studies have been published using MWCNTs-based biosensors to detect different substances and they all showed remarkable results [15,16,17,18,19,20,21,22]. Meanwhile, not satisfied with the use of pure carbon materials, scientists focused on nanocomposite with metal nanoparticles such as Au [23], Ag [24], CuO [25], Pt [26], and Pd [27], so as to further improve their sensitivity, conductivity, and catalytic properties.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection for Uric Acid Based on β-Lactoglobulin-Functionalized Multiwall Carbon Nanotubes Synthesis with PtNPs Nanocomposite

et al. 2019

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In this work, a simple and highly selective electrochemical biosensor for determination of uric acid (UA) is synthesized by using β-lactoglobulin (BLG)-functionalized multiwall carbon nanotubes (MWCNTs) and a platinum nanoparticles (PtNPs) nanocomposite. Urate oxidase (UOx) can oxidize uric acid to hydrogen peroxide and allantoin, which provides a good opportunity for electrochemical detection for UA. Under the optimized conditions, the current changes by the UOx/Bull Serum Albumin (BSA)/BLG-MWCNTs-PtNPs/Glassy Carbon (GC) electrode with the electrochemical method was proportional to the concentration of UA. According to experiments, we obtained a linear response with a concentration range from 0.02 to 0.5 mM and achieved a high sensitivity of 31.131 μA mM−1 and a low detection limit (0.8 μΜ). Meanwhile, nanoparticles improved the performance of the biosensor and combined with BLG not only prevented the accumulation of composite nanomaterials, but also provided immobilization of uricase through electrostatic adsorption. This improves the stability and gives the constructed electrode sensing interface superior performance in UA detection.

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An array of poly-l-histidine functionalized multi-walled carbon nanotubes on 4-aminothiophenol self-assembled monolayer and the application for sensitively glucose sensing

Cited by 14 publications

References 43 publications

Enhanced His@AuNCs oxidase-like activity by reduced graphene oxide and its application for colorimetric and electrochemical detection of nitrite

Enhanced His@AuNCs oxidase-like activity by reduced graphene oxide and its application for colorimetric and electrochemical detection of nitrite

A Simple and Rapid Electrochemical Determination of L-Tryptophan Based on Functionalized Carbon Black/Poly-L-Histidine Nanocomposite

Electrochemical Detection for Uric Acid Based on β-Lactoglobulin-Functionalized Multiwall Carbon Nanotubes Synthesis with PtNPs Nanocomposite

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