Purification of single walled carbon nanotubes by thermal gas phase oxidation

Gajewski, S.; Maneck, H.-E.; Knoll, U.; Neubert, D.; Dörfel, I.; Mach, R.; Strauß, Bernhard; Friedrich, Jörg

doi:10.1016/s0925-9635(02)00362-x

Cited by 48 publications

(20 citation statements)

References 23 publications

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“…Simply stated, the resonant frequency of the surface plasmons, resulting from light irradiation, changes when different materials are adsorbed on and in between the particles. This technique, known as localized surface plasmon resonance (LPSR), is the underlying principle behind many biological nanosensors [18].…”

Section: Cnt-and Gnr-based Sensorsmentioning

confidence: 99%

Simulation of Fundamental Properties of CNT- and GNR-Metal Interconnects for Development of New Nanosensor Systems

Shunin¹,

Zhukovskii

Burlutskaya³

et al. 2012

NATO Science for Peace and Security Series B: Physics and Biophysics

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Cluster approach based on the multiple scattering theory formalism, realistic analytical and coherent potentials, as well as effective medium approximation (EMA-CPA), can be effectively used for nano-sized systems modeling. Major attention is paid now to applications of carbon nanotubes (CNTs) and graphene nanoribbons (GNRs) with various morphology which possess unique physical properties in nanoelectronics, e.g., contacts of CNTs or (GNRs) with other conducting elements of a nanocircuit, which can be promising candidates for interconnects in high-speed electronics. The main problems solving for resistance C-Me junctions with metal particles appear due to the influence of chirality effects in the interconnects of single-wall (SW) and multi-wall (MW) CNTs, single-layer (SL) and multi-layer (ML) GNRs with the fitting metals (Me ¼ Ni, Cu, Ag, Pd, Pt, Au) for the predefined carbon system geometry. Using the models of 'liquid metal' and 'effective bonds' developed in the framework of the presented approach and Landauer theory, we can predict resistivity properties for the considered interconnects. We have also developed the model of the inter-wall interaction inside MW CNTs, which demonstrates possible 'radial current' losses. CNT-and GNR-Metal interconnects in FET-type nanodevices provide nanosensoring possibilities for local physical (mechanical), chemical and biochemical influences of external medium. At the same time, due to high

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Section: Cnt-and Gnr-based Sensorsmentioning

confidence: 99%

Simulation of Fundamental Properties of CNT- and GNR-Metal Interconnects for Development of New Nanosensor Systems

Shunin¹,

Zhukovskii

Burlutskaya³

et al. 2012

NATO Science for Peace and Security Series B: Physics and Biophysics

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“…However, in this case, 95% of the starting materials are destroyed and the remaining samples require annealing at high temperature 2800 [37]. For purification by oxidation, generally two approaches are followed: 1) gas phase purification [37], [38] and 2) liquid phase purification [39]- [41].…”

Section: Purificationmentioning

confidence: 99%

Carbon Nanotubes for Biomedical Applications

2011

Carbon Nanostructures

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Abstract-Carbon nanotubes (CNTs) have many unique physical, mechanical, and electronic properties. These distinct properties may be exploited such that they can be used for numerous applications ranging from sensors and actuators to composites. As a result, in a very short duration, CNTs appear to have drawn the attention of both the industry and the academia. However, there are certain challenges that need proper attention before the CNTbased devices can be realized on a large scale in the commercial market. In this paper, we report the use of CNTs for biomedical applications. The paper describes the distinct physical, electronic, and mechanical properties of nanotubes. The basics of synthesis and purification of CNTs are also reviewed. The challenges associated with CNTs, which remain to be fully addressed for their maximum utilization for biomedical applications, are discussed.

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“…In brief, the SWCNTs were subjected to a thermal oxidation for 90 min at 300°C, followed by stirring in a concentrated HCl bath overnight, before finally rinsing the nanotubes with deionized water ͑until the pH of the solution is to that of deionized water͒ and drying overnight at 120°C. 18,19 The purified SWCNTs were positively and negatively charged by noncovalent surface coatings 8 with SDS and DTAB to produce SWCNT a and SWCNT c , 9 respectively. Solutions of SDS ͑1 % wt͒ and DTAB ͑0.65 % wt͒ were prepared by dissolving the surfactants in de-ionized water.…”

Section: B Materials Preparationmentioning

confidence: 99%

Poole–Frenkel conduction in single wall carbon nanotube composite films built up by electrostatic layer-by-layer deposition

Jombert

Coleman

Wood

et al. 2008

Journal of Applied Physics

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. The fabrication of large area thin films of single wall carbon nanotubes ͑SWCNTs͒ using electrostatic layer-by-layer deposition is reported. The in-plane current versus voltage ͑I-V͒ characteristics were dependent on the concentration of SWCNTs transferred from the solvents onto the substrates. Solutions with a low SWCNT concentration produced films that exhibited a nonlinear I-V regime. The experimental data fitted with various conduction models indicated that PooleFrenkel conduction was the dominant mechanism. The temperature dependence of the conductivity also supported this model. Two activation energies were identified-approximately 10 and 20 meV. These were thought to be associated with the surfactant coatings of the nanotubes. Increasing the SWCNT loading in the thin films led to an Ohmic conduction process by virtue of a denser network of conductive paths in the film and conduction via tube to tube contacts.

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Purification of single walled carbon nanotubes by thermal gas phase oxidation

Cited by 48 publications

References 23 publications

Simulation of Fundamental Properties of CNT- and GNR-Metal Interconnects for Development of New Nanosensor Systems

Simulation of Fundamental Properties of CNT- and GNR-Metal Interconnects for Development of New Nanosensor Systems

Carbon Nanotubes for Biomedical Applications

Poole–Frenkel conduction in single wall carbon nanotube composite films built up by electrostatic layer-by-layer deposition

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