Chemical Sensing with Polyaniline Coated Single‐Walled Carbon Nanotubes

Ding, Mengning; Tang, Yifan; Gou, Pingping; Reber, Michaël; Star, Alexander

doi:10.1002/adma.201003304

Cited by 102 publications

(79 citation statements)

References 34 publications

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“…Fig. 4(d) reveals the detailed spectrum of the C element, with the peak of C 1s electrons at binding energies of 284.22 eV and 285.0 eV corresponding to the sp 2 -hybridized graphite-like carbon atoms of MWCNTs and the sp 3 -hybridized carbon atoms in a disordered structure, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3] It was found that the transport behavior of the carbonaceous species depends on the morphology and structural perfection of the CNT; e.g. single-walled carbon nanotubes (SWCNTs) or their bundles show classical transport properties such as Coulomb blockade, level quantization, Luttinger liquid characteristics, and ballistic transport, for example.…”

Section: Introductionmentioning

confidence: 99%

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In situ synthesis and electronic transport of the carbon-coated Ag@C/MWCNT nanocomposite

Wang

Javid

et al. 2018

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In situ synthesis and electronic transport of the carbon-coated Ag@C/MWCNT nanocomposite

Wang

Javid

et al. 2018

RSC Adv.

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“…They have been already in extensive use in order to immobilize desired chemical species for development of technological applications [22][23][24][25][26][27][28][29]. PANI is unique in the family of the conducting polymers due to its reversible doping/de-doping properties based on acid/base reactions [30,31]. The doped polyaniline has many features, such as better solubility, redox activity as well as conductivity over a wider pH range [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Effect of Doping with Nickel Ions on the Electrical Properties of Poly(aniline-co-o-anthranilic acid) and Doped Copolymer as Precursor of NiO Nanoparticles

Zoromba

El-Ghamaz

Alghool

2015

J Inorg Organomet Polym

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Poly(aniline-co-o-anthranilic acid) (PANAA) and its nickel composite (PANAA-Ni) are successfully prepared based on oxidative chemical polymerization via two comparative in situ and ex situ polymerization methods. PANAA copolymer contains aniline, and o-anthranilic acid moieties, were doped with different concentrations of nickel ions. The ratios of aniline, o-anthranilic acid, and nickel chloride were (1:1:0.5) and (1:1:1), respectively. The effect of nickel moiety on the properties of polyconjugated polymers, and their spectral characteristics (UVVis absorption spectra, FTIR, thermal stability) were recorded. TGA analysis confirmed that the poly(aniline-coo-anthranilic acid)/nickel (PANAA-Ni) composites, which were prepared by in situ or ex situ polymerization method, are more thermally stable than the pure PANAA copolymer. The XRD revealed that the pure and PANAA-Ni (prepared by ex situ polymerization method) is completely amorphous structure, while the PANAA-Ni composite (prepared by in situ polymerization method) is a mixture of crystalline and amorphous phases. The temperature dependence of dielectric constants (e r and e i ) as well as AC conductivity (r ac ) were investigated in the temperature range of 300-383 K and test frequency range of 0.1-100 kHz. All the tested samples showed semiconductor behavior. The values of thermal activation energies DE1 and DE2 for PANAA copolymer are calculated, and found to be in the range of 0.03-0.1 eV and 0.58-1.88 eV, respectively. We calculated DE1 and DE2 for PANAA-Ni composite, and we found their values in the range of 0.14-0.27 eV and 0.41-0.58 eV, respectively. Moreover, Nanocrystalline nickel oxide NiO powder was prepared by thermal decomposition route of (PANAA-Ni) composites, which was prepared by in situ polymerization method. The size of the obtained nickel oxide nanoparticle was determined by transmission electron microscope .

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“…Understanding heterogeneous electron transfer (HET) at CNTs is of considerable importance, due to the wide range of electroanalytical and electrocatalytic systems based on CNTs (14)(15)(16)(17), and also because electrochemistry provides an attractive route to functionalize and tailor the properties of CNTs (18)(19)(20). Probing HET in 1D electrode materials is interesting fundamentally, given their inherent electronic structure and properties (21,22).…”

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confidence: 99%

Quantitative nanoscale visualization of heterogeneous electron transfer rates in 2D carbon nanotube networks

Güell¹,

Ebejer²,

Snowden³

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

113

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Carbon nanotubes have attracted considerable interest for electrochemical, electrocatalytic, and sensing applications, yet there remains uncertainty concerning the intrinsic electrochemical (EC) activity. In this study, we use scanning electrochemical cell microscopy (SECCM) to determine local heterogeneous electron transfer (HET) kinetics in a random 2D network of single-walled carbon nanotubes (SWNTs) on an Si∕SiO 2 substrate. The high spatial resolution of SECCM, which employs a mobile nanoscale EC cell as a probe for imaging, enables us to sample the responses of individual portions of a wide range of SWNTs within this complex arrangement. Using two redox processes, the oxidation of ferrocenylmethyl trimethylammonium and the reduction of ruthenium (III) hexaamine, we have obtained conclusive evidence for the high intrinsic EC activity of the sidewalls of the large majority of SWNTs in networks. Moreover, we show that the ends of SWNTs and the points where two SWNTs cross do not show appreciably different HET kinetics relative to the sidewall. Using finite element method modeling, we deduce standard rate constants for the two redox couples and demonstrate that HET based solely on characteristic defects in the SWNT side wall is highly unlikely. This is further confirmed by the analysis of individual line profiles taken as the SECCM probe scans over an SWNT. More generally, the studies herein demonstrate SECCM to be a powerful and versatile method for activity mapping of complex electrode materials under conditions of high mass transport, where kinetic assignments can be made with confidence.W ithin the family of nanostructured materials, carbon nanotubes (CNTs) have attracted particular attention because they are readily synthesised at low cost, have exceptional electronic properties, exhibit chemical and mechanical stability, and are amenable to a wide range of simple chemical functionalization routes (1-3). These characteristics have led to CNTs being considered ideal substrates for electronics (4), sensing systems (5, 6), electrocatalytic supports (7), and batteries (8). Furthermore, the different configurations in which CNTs can be arranged broaden their versatility and allow custom design of devices for specific applications. Individual single-walled carbon nanotubes (SWNTs) (9), 2D networks (10-12), and 3D nanostructures (13) have all been employed successfully.Understanding heterogeneous electron transfer (HET) at CNTs is of considerable importance, due to the wide range of electroanalytical and electrocatalytic systems based on CNTs (14-17), and also because electrochemistry provides an attractive route to functionalize and tailor the properties of . Probing HET in 1D electrode materials is interesting fundamentally, given their inherent electronic structure and properties (21,22). However, as we highlight herein, despite many studies aimed at characterizing HET at CNTs, substantial questions remain unanswered, such as the location and rate of HET.A popular approach for studying electrochemistry at CNT...

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Chemical Sensing with Polyaniline Coated Single‐Walled Carbon Nanotubes

Cited by 102 publications

References 34 publications

In situ synthesis and electronic transport of the carbon-coated Ag@C/MWCNT nanocomposite

In situ synthesis and electronic transport of the carbon-coated Ag@C/MWCNT nanocomposite

Effect of Doping with Nickel Ions on the Electrical Properties of Poly(aniline-co-o-anthranilic acid) and Doped Copolymer as Precursor of NiO Nanoparticles

Quantitative nanoscale visualization of heterogeneous electron transfer rates in 2D carbon nanotube networks

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