Material and electrochemical studies of platinum nanoparticle-coated carbon nanotubes for biosensing

Xie, Jining; Wang, Shouyan; Aryasomayajula, Lavanya; Varadan, Vijay K.

doi:10.1109/nano.2007.4601370

Cited by 5 publications

(8 citation statements)

References 14 publications

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“…Pt nanoparticles immobilized on conductive carbon allotropes such as graphitic carbon or nanotubes serve, for example, as highly active electrocatalysts for oxygen reduction and the hydrogen evolution reaction (HER) . Pt/C is also commonly used in heterogeneous catalysis for oxidation and hydrogenation reactions, in amperometric biosensors, or in hydrogen storage …”

Section: Introductionmentioning

confidence: 99%

“…Typical Pt/C catalysts have been synthesized by impregnation of a carbon support with a solution containing a dissolved Pt species, followed by a thermal treatment that converts the precursor into metallic Pt particles . Alternatively, preformed colloidal Pt particles have been immobilized on carbon supports .…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, preformed colloidal Pt particles have been immobilized on carbon supports . Such carbon supports are typically supplied as powders (e.g., carbon nanotubes, activated carbon, carbon black).…”

Section: Introductionmentioning

confidence: 99%

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Nafion‐Free Carbon‐Supported Electrocatalysts with Superior Hydrogen Evolution Reaction Performance by Soft Templating

et al. 2016

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Efficient water electrolysis requires electrode coatings with high catalytic activity. Platinum efficiently catalyzes the hydrogen evolution reaction in acidic environments, but is a rare and expensive metal. The activity achieved per metal atom can be increased if small Pt particles are dispersed onto electrically conductive, highly accessible and stable support materials. However, the addition of Nafion, a typical binder material used in the manufacture of electrode coatings, can decrease catalytic activity by the blocking of pores and active surface sites. A new approach is reported for the direct synthesis of highly active Nafion‐free Pt/C catalyst films consisting of small Pt nanoparticles supported in size‐controlled mesopores of a conductive carbon film. The synthesis relies on the co‐deposition of suitable Pt and C precursors in the presence of polymer micelles, which act as pore templates. Subsequent carbonization in an inert atmosphere produces porous catalyst films with controlled film thickness, pore size and particle size. The catalysts clearly outperform all Nafion‐based Pt/C catalysts reported in the literature, particularly at high current densities.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nafion‐Free Carbon‐Supported Electrocatalysts with Superior Hydrogen Evolution Reaction Performance by Soft Templating

et al. 2016

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“…Thus, methods were developed to functionalize metallic nanoparticles to nanotubes by non‐covalent and covalent modifications. For instance, platinum‐decorated carbon nanotubes were used for hydrogen storage, nanowire actuators, glucose sensors and proton exchange membrane fuel cells . Consequently, research has been carried out for the Pt functionalization of carbon nanotubes and the characterization of derived Pt/CNT electrodes .…”

Section: Introductionmentioning

confidence: 99%

Platinum(II)‐Coordinated Pyridine‐Functionalized Single‐Wall Carbon Nanotubes and Electron Transport in Their Films

et al. 2015

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Carbon nanotubes (CNTs) are ideal support materials for platinum in fuel cells. However,l ittle is known about the conduction mechanism of Pt-coordinated CNTs. Herein, ac oordination complexo fp yridine-functionalized singlewalled nanotubes (Py-SWNTs) with Pt (Pt/Py-SWNTs) was prepared via the ligand exchange reaction between cis-[Pt(dmso) 2 Cl 2 ]a nd Py-SWNTsg enerated by pyridine diazonium salt addition to SWNTs. The presence of Pt in modified SWNTsw as confirmed by X-ray photoelectron spectroscopy (XPS). The N1 sX PS spectra provided evidence of Pt coordination to the pyridine nitrogen atom. Modified SWNTsw ere furtherc haracterized by thermogravimetric analysisc oupled with mass spectrometry,u ltraviolet-visible-near infrared spectroscopy,R amans pectroscopy,a nd elemental analysis. The electron conduction mechanism of Pt/Py-SWNT films was bestd escribed by am odified quantum tunneling model,i dentified from ac ombined analysis of the voltage and temperature dependence of the current.

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“…Metal decoration on nanotubes has opened a new avenue of research with significant opportunities in various fields. − One main purpose of the decoration of nanotubes is to make a sensitive hybrid device in which metal nanoparticles act as reactive sites for the adsorption of the chemical and/or biological species. In particular, the assembly of carbon nanotubes (CNTs) and silver nanoparticles (Ag NPs) has specific interest as a new hybrid material because its recent potential applications have been found useful in the study of SERS, , antimicrobial agents, pH sensors, gas sensors, electrical conductivity enhancement, electrocatalytic activity, etc.…”

mentioning

confidence: 99%

Controlled Assembly of Ag Nanoparticles and Carbon Nanotube Hybrid Structures for Biosensing

Sahoo¹,

Husale

Karna

et al. 2011

J. Am. Chem. Soc.

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Here we report a chemical-free, simple, and novel method in which a part from a silver-based anode is controllably used in a straightforward manner to produce silver nanoparticles (Ag NPs) in order to fabricate a controlled assembly of Ag NPs and single walled carbon nanotube (SWCNT) hybrid structures. The attachment and distribution of Ag NPs along SWCNTs have been investigated and characterized by field emission scanning electron microscopy (FESEM). We have achieved the decoration of SWCNTs with different densities of Ag NPs by changing the deposition time, the applied voltage, and the location of carbon nanotubes with respect to the anode. At low voltage, single silver nanoparticle is successfully attached at the open ends of SWCNTs whereas at high voltage, intermediate and full coverage densities of Ag NPs are observed. As voltage is further increased, fractals of Ag NPs along SWCNTs are observed. In addition, a device based on a Ag NPs-SWNT hybrid structure is used for the label-free detection of ssDNA molecules immobilized on it. We believe that the proposed method can be used to decorate and/or assemble metal nanoparticles or fractal patterns along SWCNTs with different novel metals such as gold, silver, and copper and can be exploited in various sensitive applications for fundamental research and nanotechnology.

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Material and electrochemical studies of platinum nanoparticle-coated carbon nanotubes for biosensing

Cited by 5 publications

References 14 publications

Nafion‐Free Carbon‐Supported Electrocatalysts with Superior Hydrogen Evolution Reaction Performance by Soft Templating

Nafion‐Free Carbon‐Supported Electrocatalysts with Superior Hydrogen Evolution Reaction Performance by Soft Templating

Platinum(II)‐Coordinated Pyridine‐Functionalized Single‐Wall Carbon Nanotubes and Electron Transport in Their Films

Controlled Assembly of Ag Nanoparticles and Carbon Nanotube Hybrid Structures for Biosensing

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