Journal ArticleDOI
Electrochemical biosensing platforms using platinum nanoparticles and carbon nanotubes.
TLDR
With glucose oxidase (GOx) as an enzyme model, a GC or carbon fiber microelectrode-based biosensor is constructed that responds even more sensitively to glucose than the GC/GOx electrode modified by Pt nanoparticles or CNTs alone.Abstract:
Platinum nanoparticles with a diameter of 2-3 nm were prepared and used in combination with single-wall carbon nanotubes (SWCNTs) for fabricating electrochemical sensors with remarkably improved sensitivity toward hydrogen peroxide. Nafion, a perfluorosulfonated polymer, was used to solubilize SWCNTs and also displayed strong interactions with Pt nanoparticles to form a network that connected Pt nanoparticles to the electrode surface. TEM and AFM micrographs illustrated the deposition of Pt nanoparticles on carbon nanotubes whereas cyclic voltammetry confirmed an electrical contact through SWCNTs between Pt nanoparticles and the glassy carbon (GC) or carbon fiber backing. With glucose oxidase (GOx) as an enzyme model, we constructed a GC or carbon fiber microelectrode-based biosensor that responds even more sensitively to glucose than the GC/GOx electrode modified by Pt nanoparticles or CNTs alone. The response time and detection limit (S/N = 3) of this biosensor was determined to be 3 s and 0.5 microM, respectively.read more
Citations
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Journal ArticleDOI
Electrochemical Glucose Biosensors
TL;DR: The major factors that play a role in the development of clinically accurate in-vivo glucose sensors include issues related to biocompatibility, miniaturization, long-term stability of the enzyme and transducer, oxygen deficit, short stabilization times, in- vivo calibration, baseline drift, safety, and convenience.
Journal ArticleDOI
Carbon‐Nanotube Based Electrochemical Biosensors: A Review
TL;DR: A review of carbon-nanotubes (CNT) based electrochemical biosensors can be found in this paper, where common designs of CNT-based sensors are discussed, along with practical examples of such devices.
Journal ArticleDOI
A graphene-based electrochemical device with thermoresponsive microneedles for diabetes monitoring and therapy
Hyunjae Lee,Tae-Kyu Choi,Young Bum Lee,Hye Rim Cho,Roozbeh Ghaffari,Liu Wang,Hyung Jin Choi,Taek Dong Chung,Nanshu Lu,Taeghwan Hyeon,Seung Hong Choi,Seung Hong Choi,Dae-Hyeong Kim +12 more
TL;DR: G graphene doped with gold and combined with a gold mesh has improved electrochemical activity over bare graphene, sufficient to form a wearable patch for sweat-based diabetes monitoring and feedback therapy and can be thermally actuated to deliver Metformin and reduce blood glucose levels in diabetic mice.
Journal ArticleDOI
Recent advances in electrochemical sensing for hydrogen peroxide: a review
TL;DR: In this article, the electrocatalytic H(2)O( 2) determinations are mainly focused on because they can provide a superior sensing performance over non-electrocatalysttic ones.
Journal ArticleDOI
Nanomaterial-based electrochemical biosensors
TL;DR: New nanoparticle-based signal amplification and coding strategies for bioaffinity assays are discussed, along with carbon-nanotube molecular wires for achieving efficient electrical communication with redox enzyme and nanowire-based label-free DNA sensors.
References
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Noncovalent Sidewall Functionalization of Single-Walled Carbon Nanotubes for Protein Immobilization
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Journal ArticleDOI
Carbon Nanotube Actuators
Ray H. Baughman,Changxing Cui,Anvar A. Zakhidov,Zafar Iqbal,Joseph N. Barisci,G.M. Spinks,Gordon G. Wallace,Alberto Mazzoldi,Danillo de Rossi,Andrew G. Rinzler,Oliver Jaschinski,S. Roth,Miklos Kertesz +12 more
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