Metallic conductivity in bamboo-shaped multiwalled carbon nanotubes

Jang, Jin Woo; Lee, D.K.; Lee, C.E.; Lee, T.J.; Lee, C.J.; Noh, S. J.

doi:10.1016/s0038-1098(02)00153-9

Cited by 47 publications

(27 citation statements)

References 20 publications

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“…Depending on their atomic structure, CNTs behave electrically as a metal or as a semiconductor [39,40]. The subtle electronic properties suggest that CNTs have the ability to promote charge-transfer reactions when used as an electrode [41 -44].…”

Section: Introductionmentioning

confidence: 99%

Electrochemistry and Adsorptive Stripping Voltammetric Determination of Amoxicillin on a Multiwalled Carbon Nanotubes Modified Glassy Carbon Electrode

Rezaei

Damiri

2009

Electroanalysis

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The study of electrochemical behavior of amoxicillin (AMX), a b-lactam antibiotic, is described on a multiwalled carbon nanotubes (MWCNTs) modified electrode by electrochemical impedance spectroscopy (EIS) and adsorptive stripping voltammetry for sensitive determination of AMX in pharmaceutical and human urine samples within a wide pH range from 2.0 to 10.0. Also, studies by Fe 2 O 3 nanoparticles modified carbon paste electrode show that iron oxide impurities in the MWCNTs are not active sites for sensing of amoxicillin. Under optimized conditions, the oxidation peak has two linear dynamic ranges of 0.6 -8.0 and 10.0 -80.0 mM with a detection limit of 0.2 mM and a precision of < 4%.

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Section: Introductionmentioning

confidence: 99%

Electrochemistry and Adsorptive Stripping Voltammetric Determination of Amoxicillin on a Multiwalled Carbon Nanotubes Modified Glassy Carbon Electrode

Rezaei

Damiri

2009

Electroanalysis

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“…Since the discovery of CNTs by Iijima [1] in 1991 using transmission electron microscopy, CNTs have been the subject of numerous investigations in chemical, physical and materials areas due to their novel structural, mechanical, electronic, and chemical properties [3,4]. Depending on their atomic structure, CNTs behave electrically as a metal or as a semiconductor [5][6][7]. The subtle electronic properties suggest that CNTs have the ability to promote electron-transfer reactions when used as an electrode in chemical reactions [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behavior of l-dopa at single-wall carbon nanotube-modified glassy carbon electrodes

Yan

Pang

et al. 2004

Journal of Electroanalytical Chemistry

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“…[6] In the case of SWNTs, depending on their chirality [1] and diameter, [8,9] either metallic or semiconductor behavior can be obtained. The electronic properties of MWNTs, although less well known, have been shown to exhibit either metallic [10] or semiconducting [11] characteristics depending on their outermost shell. Intershell interactions in these MWNTs are weak, confining electrical transport to the outermost shell.…”

mentioning

confidence: 99%

Photoluminescence Quenching Control in Quantum Dot–Carbon Nanotube Composite Colloids Using a Silica‐Shell Spacer

et al. 2006

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The remarkable structure-dependent electronic, mechanical, optical, and magnetic properties [1][2][3][4] of carbon nanotubes (CNTs) have triggered intensive study directed towards numerous applications in many different fields. [5] To this end,CNTs are expected to be controllably assembled into designed architectures as integral components of composites and/or supramolecular structures. Many of the future applications of single-walled carbon nanotubes (SWNTs) [6] and multiwalled carbon nanotubes (MWNTs) [7] are highly dependent on their electronic properties and, in this context, their ballistic transport behavior and long electron-mean-free-path have shown their potential as molecular wires. [6] In the case of SWNTs, depending on their chirality [1] and diameter, [8,9] either metallic or semiconductor behavior can be obtained. The electronic properties of MWNTs, although less well known, have been shown to exhibit either metallic [10] or semiconducting [11] characteristics depending on their outermost shell. Intershell interactions in these MWNTs are weak, confining electrical transport to the outermost shell.[9] The electrical properties of MWNTs can be manipulated by using current-induced oxidation to break down systematically the outermost shells in a layer-by-layer (LbL) fashion, opening the possibility of selecting tubes with desired electrical properties. [12] Recently, novel strategies have been devoted to alter the physical properties of CNTs by surface modification with organic, inorganic, and biological species, [13] rendering functional CNT composites for novel applications.[14] Among these surface modifications, the linkage of semiconductor nanocrystals to CNTs has emerged as a novel strategy to change the optical and electronic properties of the nanotubes. Nanoparticles of II-VI semiconductors are highly luminescent, inorganic crystals which possess size-tunable electronic and optical properties resulting from quantum confinement of the photoexcited exciton.[15] Solar cells, biological sensors, and light-emitting devices are some envisioned applications of these quantum dots (QDs), since their response wavelength can be tuned depending on their size, [16] and once assembled they reveal interesting collective physical properties. [15,17] Additionally, CNTs can be used as templates for the formation of linear assemblies which present promising applications as integral components in optical and electronic devices. All these applications require a better understanding of the influence of separation between CNTs and QDs on the electronic and optical properties. Several examples of QD-CNT composites have been reported, [18] including CNT-QD junctions using CdTe in ozonized CNTs, [18c] CNT/CdS core-shell nanowires produced by chemical reduction, [18j] and heterojunctions of amine-terminated ZnS-coated CdSe@ZnS on acid-oxidized CNTs.[18e] The formation of these heterostructures was successfully performed despite there being poor control over the surface coverage and the degree of QD clustering onto th...

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Metallic conductivity in bamboo-shaped multiwalled carbon nanotubes

Cited by 47 publications

References 20 publications

Electrochemistry and Adsorptive Stripping Voltammetric Determination of Amoxicillin on a Multiwalled Carbon Nanotubes Modified Glassy Carbon Electrode

Electrochemistry and Adsorptive Stripping Voltammetric Determination of Amoxicillin on a Multiwalled Carbon Nanotubes Modified Glassy Carbon Electrode

Electrochemical behavior of l-dopa at single-wall carbon nanotube-modified glassy carbon electrodes

Photoluminescence Quenching Control in Quantum Dot–Carbon Nanotube Composite Colloids Using a Silica‐Shell Spacer

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