Electrochemical Nanoneedle Biosensor Based on Multiwall Carbon Nanotube

Boo, Hankil; Jeong, Ran-A; Park, Se Jin; Kim, Keun Soo; An, Kay Hyeok; Lee, Young Hee; Han, Jae‐Hee; Kim, Hee Chan; Chung, Taek Dong

doi:10.1021/ac0508595

Cited by 98 publications

(54 citation statements)

References 35 publications

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“…Fe(CN)6 3-Ep,c= 0.213 V, Ep,a= 0.380 V, and E=0.167 was also assumed to be due to the intrinsic electronic properties of MWCNT [43]. Thus, evaluating the functionality of nanomaterials under specific conditions is crucial for their integration as functional components in miniaturized devices.…”

mentioning

confidence: 99%

On “resistance overpotential” caused by a potential drop along the ultrathin high aspect ratio gold nanowire electrodes in cyclic voltammetry

Muratova

Mikhelson

Ermolenko

et al. 2016

J Solid State Electrochem

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High aspect ratio ultrathin (d10 nm) gold nanowires deposited on Si/SiO2 substrate are used as working electrodes for measuring cyclic voltammograms (CVs) in aqueous solutions of ferrocene methanol and potassium hexacyanoferrate(III). The broadening of the peak separation as compared with that at a solid working electrode is explained as a result of the potential drop ("resistance overpotential") along nanowires and nanowire network. The change in the CV shape over a sequence of scans is ascribed to a gradual breakup of individual nanowires and the respective transition of the linear diffusion to hemispherical diffusion regularities.

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mentioning

confidence: 99%

On “resistance overpotential” caused by a potential drop along the ultrathin high aspect ratio gold nanowire electrodes in cyclic voltammetry

Muratova

Mikhelson

Ermolenko

et al. 2016

J Solid State Electrochem

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“…Other glutamate sensing materials include polymer/ enzyme composites [70,71], nanoparticle iridium/carbon film [72], DNA-Cu(II)/polyamine membrane [73], nanoneedles [74], ferrocene functionalized SWCNT interdigitated construction film [52], Prussian blue film [45], and others.…”

Section: Glutamate Dehydrogenase-based Biosensorsmentioning

confidence: 99%

Enzyme-Based Electrochemical Glutamate Biosensors

Okon¹,

Ronkainen²

2017

Electrochemical Sensors Technology

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Glutamate, a major excitatory neurotransmitter in the mammalian central nervous system, plays a vital role in many physiological processes and is one of the key neurotransmitters of interest in psychopharmacology. It is involved in many normal and abnormal behaviors related to neurological and psychiatric disorders. The glutamate system has been proposed to play a significant role in various neurological and psychiatric disorders such as Alzheimer's disease, autism, schizophrenia, depression, drug addiction, and more. The design, construction, and optimization of enzyme-based electrochemical biosensors for in vivo and in vitro detection of glutamate are active areas of interdisciplinary research. For example, various glutamate biosensors have been developed for monitoring dynamic levels of extracellular glutamate in the living brain tissue adding to the current medical knowledge of these complex neurotransmitter systems and ultimately impacting treatment plans. In addition to biological sciences and clinical medicine, glutamate biosensors have been used in environmental monitoring, in the fermentation industry, and in the food industry for determination of monosodium glutamate (MSG), a common flavor-enhancing food additive.

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“…One really innovative strategy in this fi eld has recently been reported by Boo et al [57] who fabricated a nanoneedle consisting of a MWNTs attached to the end of an etched tungsten tip, which is the smallest needle -type biosensor reported to date (diameter = 30 nm, length = 2 -3 μ m). A tungsten tip was electrochemically etched to form a sharp, long -tip geometry, to which a MWNT was coupled using a fi eld -emission scanning electron microscope equipped with two piezoelectric nanomanipulators.…”

Section: Carbon Nanotubes Used In Catalytic Biosensorsmentioning

confidence: 99%

New Micro‐ and Nanotechnologies for Electrochemical Biosensor Development

Berti

Turner

2011

Biosensor Nanomaterials

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IntroductionOver the last decade, great attention has been paid to the inclusion of newly developed nanomaterials such as nanowires, nanotubes, and nanocrystals in sensor devices. This can be attributed to the ability to tailor the size and structure, and hence the properties of nanomaterials, thus opening up excellent prospects for designing novel sensing systems and enhancing the performance of bioanalytical assays [1] . Considering that most biological systems, including viruses, membranes, and protein complexes, are naturally nanostructured materials and that molecular interactions take place on a nanometer scale, nanomaterials are intuitive candidates for integration into biomedical and bioanalytical devices [2, 3] . Moreover, they can pave the way for the miniaturization of sensors and devices with nanometer dimensions (nanosensors and nanobiosensors) in order to obtain better sensitivity, specifi city, and faster rates of recognition compared to current solutions.The chemical, electronic, and optical properties of nanomaterials generally depend on both their dimensions and their morphology [4] . A wide variety of nanostructures have been reported in the literature for interesting analytical applications. Among these, organic and inorganic nanotubes, nanoparticles, and metal oxide nanowires have provided promising building blocks for the realization of nanoscale electrochemical biosensors due to their biocompatibility and technologically important combination of properties, such as high surface area, good electrical properties, and chemical stability. Moreover, the integration of nanomaterials in electrochemical devices offers the possibility of realizing portable, easy -to -use, and inexpensive sensors, due to the ease of miniaturization of both the material and the transduction system. Over the last decade, this fi eld has been extensively investigated and a huge number of papers have been published. This chapter principally summarizes progress made in the last few years (2005 to date) in the integration of nanomaterials such as carbon nanotubes (CNTs), nanoparticles, and polymer nanostructures in electrochemical biosensing systems.

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Electrochemical Nanoneedle Biosensor Based on Multiwall Carbon Nanotube

Cited by 98 publications

References 35 publications

On “resistance overpotential” caused by a potential drop along the ultrathin high aspect ratio gold nanowire electrodes in cyclic voltammetry

On “resistance overpotential” caused by a potential drop along the ultrathin high aspect ratio gold nanowire electrodes in cyclic voltammetry

Enzyme-Based Electrochemical Glutamate Biosensors

New Micro‐ and Nanotechnologies for Electrochemical Biosensor Development

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