Integration and Distribution of Carbon Nanotubes in Solution-Processed Polyaniline/Carbon Nanotube Composites

Ramamurthy, Praveen C.; Harrell, William R.; Gregory, Richard V.; Rao, Apparao M.

doi:10.1149/1.2719609

Cited by 17 publications

(9 citation statements)

References 46 publications

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“…This is in accordance with the fact that as the MWCNT concentration increases, the conductivity of the composite increases. This procedure in the I-V characteristics is in agreement with the results reported by other investigators regarding in situ polymerized and solution processed composites [17,18].…”

Section: Resultssupporting

confidence: 92%

Schottky Diodes Based on Polyaniline/Multi-Walled Carbon Nanotube Composites

2015

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Polyaniline/multi-walled carbon nanotube composites (PANI/MWCNT), with various concentration of multiwalled carbon nanotube, were synthesized. Several Schottky diodes were fabricated, where PANI or PANI/MWCNT composites, aluminum, and gold were used as semiconductor, Schottky contact, and ohmic contact, respectively. Then current-voltage characteristics of the fabricated diodes were measured at room temperature and within the bias range of −5 to + 5 V. The measurements were repeated three times for each sample to verify repeatability of experiment. The obtained results show that by increasing the MWCNT concentration, the current intensity increases. Furthermore, I-V characteristics of pure polyaniline Schottky diode follows the thermionic emission mechanism while the I-V characteristics of Schottky diodes based on PANI/MWCNT composites show two distinct power law regions. At lower voltages, the mechanism follows Ohm's Law, whereas at higher voltages, the mechanism is compatible with space charge limited conduction emission mechanism. The parameters of Schottky diodes were determined, and it was observed that critical voltage decreased when the concentration of MWCNT in the composite increased.

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Section: Resultssupporting

confidence: 92%

Schottky Diodes Based on Polyaniline/Multi-Walled Carbon Nanotube Composites

2015

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“…Suitable matrices include the transparent and widely available poly(methyl methacrylate) and polystyrene. Polyaniline represents another possible matrix; in that case, percolation requires only a close approach of nanotubes, rather than direct contact, and even lower loading levels are possible (20,21). A polyaniline-nanotube composite with loading levels on the order of 1% was patterned by use of laser ablation-induced dry transfer to make conductive lines suitable for organic electronics (22).…”

Section: Figurementioning

confidence: 99%

Thin-Film Organic Electronic Devices

Katz

Huang²

2009

Annu. Rev. Mater. Res.

246

164

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We review recently published advancements in thin-film organic devices, ranging from the composition and properties of organic materials to be used in devices, to the applications of devices, with special emphasis on thin-film transistors, diodes, and chemical sensors. We present exemplary materials used in each kind of device, outline the physical mechanisms behind the functioning of the devices, and discuss the most advanced capabilities of the devices and device assemblies. Advantages to the selection of organic and polymeric materials, future prospects, and challenges for organic-based electronics are also considered.

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“…According to the SEM images, it is found that the work electrode is completely covered by PANI/CNT composites after three cycles. The porous network structure of PANI/CNT films can offer more approaches for electron transport and facilitate ion transmission [14] .…”

Section: Morphologiesmentioning

confidence: 99%

Electrochemical Polymerization and Characterization of Polyaniline/Carbon Nanotube Composite Films

Zhao¹,

Li²,

Guo³

et al. 2016

Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)

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Abstract. Polyaniline/Carbon Nanotube (PANI/CNT) composite films doped with dodecyl benzene sulfonic acid were synthesized by cyclic voltammetry on an ITO-deposited polyethylene terephthalate substrate. The SEM and FTIR were used to characterize the micro-morphology and chemical structure. The effect of CNT concentration on the electrical conductivity of the film was measured by a four-probe resistivity instrument. The electrochromic behavior of the composite film was characterized by a spectral photometer and an electrochemistry analyzer. The results show that CNTs act as a skeleton on which aniline can polymerize in the polymerization of PAN/CNT composite film. The film exhibits a porous network structure which can offer more approaches for electron transport and facilitate ion transmission. The cyclic voltammetry current density in the third polymerization cycle is the maximum because of the dense criss-cross network in the film. The CNT concentration takes great effects on the performance of PANI/CNT composite film, and the electric conductivity of the film improves with the CNT concentration rising within some limits. The CNT percolation threshold of the film is about 3.5wt.%. The PANI/CNT film polymerized at a CNT concentration of 2.5 wt.%, shows a reflectance change range of 38.8% at 540nm as well as a coloration efficiency of 386.4cm -2 /C, which means that the PANI/CNT composite film has good behavior of voltage response.

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Integration and Distribution of Carbon Nanotubes in Solution-Processed Polyaniline/Carbon Nanotube Composites

Cited by 17 publications

References 46 publications

Schottky Diodes Based on Polyaniline/Multi-Walled Carbon Nanotube Composites

Schottky Diodes Based on Polyaniline/Multi-Walled Carbon Nanotube Composites

Thin-Film Organic Electronic Devices

Electrochemical Polymerization and Characterization of Polyaniline/Carbon Nanotube Composite Films

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