Direct electrochemistry of horseradish peroxidase immobilized on a monolayer modified nanowire array electrode

Xu, Jiaqiang; Shang, Fengjun; Luong, John H. T.; Razeeb, Kafil M.; Glennon, Jeremy D.

doi:10.1016/j.bios.2009.10.018

Cited by 109 publications

(57 citation statements)

References 40 publications

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“…porous Rh NTs [13] 1.4 640 8 enzyme-modified Au NWs [24] 0.4245.86 3-4 porous Au NTs [34] 2.3 770 3.6 template-supportedA uN Ts [48] 4420 8 Pd-NP-decorated Au NWs [49] 5530 n.s. Pd-NP-loaded Cn anofibers [50] 0.2 370 5 Ag-NP-decorated Si NWs [51] 0.2 57.5 n.s.…”

Section: à2mentioning

confidence: 99%

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

et al. 2015

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We present a versatile approach for the fabrication of well‐defined networks of interconnected metal nanotubes, which applies electroless plating to ion‐track‐etched polymer templates that enclose designed pore networks. In order to obtain self‐supporting structures, the deposition reactions must be optimized to yield conformal nanoscale metal films on microstructured substrates possessing extensive inner surfaces. Using this route, gold, copper, silver, nickel, and platinum nanotube networks are synthesized. The resulting structures can be handled macroscopically and combine a large surface area with continuous mass transport and conduction pathways, rendering them promising for application in, for example, electrocatalysis and sensing. This potential is demonstrated by employing a gold nanotube network for the amperometric detection of hydrogen peroxide, in which excellent sensitivity, catalyst utilization, and stability is achieved.

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Section: à2mentioning

confidence: 99%

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

et al. 2015

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“…Moreover, gold nanoparticles have good conductivity, which can enhance enzyme activity. 49 More significantly, the electrochemical responses could be improved by using …”

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confidence: 99%

Fe3O4/Au magnetic nanoparticle amplification strategies for ultrasensitive electrochemical immunoassay of alfa-fetoprotein

Gan¹,

Jin²,

Li³

et al. 2011

IJN

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Background The purpose of this study was to devise a novel electrochemical immunosensor for ultrasensitive detection of alfa-fetoprotein based on Fe 3 O 4 /Au nanoparticles as a carrier using a multienzyme amplification strategy. Methods and results Greatly enhanced sensitivity was achieved using bioconjugates containing horseradish peroxidase (HRP) and a secondary antibody (Ab 2 ) linked to Fe 3 O 4 /Au nanoparticles (Fe 3 O 4 /Au-HRP-Ab 2 ) at a high HRP/Ab 2 ratio. After a sandwich immunoreaction, the Fe 3 O 4 /Au-HRP-Ab 2 captured on the electrode surface produced an amplified electrocatalytic response by reduction of enzymatically oxidized hydroquinone in the presence of hydrogen peroxide. The high content of HRP in the Fe 3 O 4 /Au-HRP-Ab 2 could greatly amplify the electrochemical signal. Under optimal conditions, the reduction current increased with increasing alfa-fetoprotein concentration in the sample, and exhibited a dynamic range of 0.005–10 ng/mL with a detection limit of 3 pg/mL. Conclusion The amplified immunoassay developed in this work shows good precision, acceptable stability, and reproducibility, and can be used for detection of alfa-fetoprotein in real samples, so provides a potential alternative tool for detection of protein in the laboratory. Furthermore, this immunosensor could be regenerated by simply using an external magnetic field.

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“…In the scan rate range from 2-1000 mVs Its slope is 0.771 and indicates adsorption-control of the electrode process. A slope close to 0.5 is expected for diffusion-controlled electrode processes and close to 1.0 for adsorption-controlled processes [21][22][23][24]. Figure 2D presents a dependence of E p on scan rate determined from cyclic voltammograms recorded for the L-Trp electrooxidation.…”

Section: Resultsmentioning

confidence: 99%

Poly-dopamine-Beta-Cyclodextrin Modified Glassy Carbon Electrode as a Sensor for the Voltammetric Detection of L-Tryptophan at Physiological pH

Hasanzadeh¹

2017

J Forensic Sci Res

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The main purpose of this report was to develop application of poly-dopamine-beta-cyclodextrin modifi ed glassy carbon electrode (PDA-β-CD-GCE) towards electrooxidation and determination of L-Tryptophan (L-Trp) and also the evaluation its kinetic parameters. In continuation of our efforts to use PDA-β-CD-GCE for amino acids detection, our objective in the present work was to expand application of this sensor for the determination of L-Trp which is very sensitive.

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Direct electrochemistry of horseradish peroxidase immobilized on a monolayer modified nanowire array electrode

Cited by 109 publications

References 40 publications

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

Fe3O4/Au magnetic nanoparticle amplification strategies for ultrasensitive electrochemical immunoassay of alfa-fetoprotein

Poly-dopamine-Beta-Cyclodextrin Modified Glassy Carbon Electrode as a Sensor for the Voltammetric Detection of L-Tryptophan at Physiological pH

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