Journal ArticleDOI
Chiral nanotubes of polyaniline synthesized by a template-free method
Yongsheng Yang,Meixiang Wan +1 more
TLDR
In this paper, a template-free method was used to synthesize chiral nanotubes of polyaniline (PANI) using (S)-(−)-2-pyrrolidone-5-carboxylic acid as the dopant for the first time.Abstract:
Chiral nanotubes of polyaniline (PANI) were successfully synthesized by a template-free method in the presence of (S)-(−)-2-pyrrolidone-5-carboxylic acid [(S)-PCA)] or (R)-(+)-2-pyrrolidone-5-carboxylic acid [(R)-PCA] as the dopant for the first time. The tubular morphologies of the resulting PANI–(S)-PCA and PANI–(R)-PCA were confirmed by SEM and TEM images. The tubes are 80–220 nm in outer diameter and 50–130 nm in inner diameter. It was proposed that the micelles of aniline–(S)-PCA or (R)-PCA, which were formed due to the hydrophobic aniline and the hydrophilic -COOH group of PCA, played a “template” role during the formation of the chiral nanotubes. These chiral nanotubes showed optically active and electrical properties. In particular,
a positive and a negative Cotton effect corresponding to a helical screw of the polymer main chains was observed in the chiral nanotubes. The structural characterization measured by FTIR and X-ray diffraction indicated that the configuration of PCA did not affect the main chains of the chiral nanotubes; however, short-range ordering at 2θ
= 6.43 (d
= 13.73 A) was significantly observed from the chiral nanotubes, which might result from the chiral character of the dopant.read more
Citations
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Journal ArticleDOI
Hierarchical Nanocomposites of Polyaniline Nanowire Arrays on Graphene Oxide Sheets with Synergistic Effect for Energy Storage
TL;DR: The hierarchical nanocomposite possessed higher electrochemical capacitance and better stability than each individual component as supercapacitor electrode materials, showing a synergistic effect of PANI and GO.
Journal ArticleDOI
Polyaniline-grafted reduced graphene oxide for efficient electrochemical supercapacitors
Nanjundan Ashok Kumar,Hyun-Jung Choi,Yeon Ran Shin,Dong Wook Chang,Liming Dai,Jong-Beom Baek +5 more
TL;DR: Electron microscopic studies demonstrated that the resultant composite has fibrillar morphology with a room-temperature electrical conductivity as high as 8.66 S/cm and capacitance of 250 F/g with good cycling stability.
Journal ArticleDOI
One-dimensional conducting polymer nanocomposites: Synthesis, properties and applications
TL;DR: In this paper, an overview of the synthesis of one-dimensional (1D) conducting polymer nanocomposites and their properties and applications is presented, where the authors highlight the advantages of 1D conducting polymer polymers over the parent conducting polymers.
Journal ArticleDOI
Hierarchical porous graphene/polyaniline composite film with superior rate performance for flexible supercapacitors.
TL;DR: A highly flexible graphene free-standing film with hierarchical structure is prepared by a facile template method and proves to be an excellent electrode material for flexible supercapacitors.
Journal ArticleDOI
Synthesis and applications of one-dimensional nano-structured polyaniline: An overview
Donghua Zhang,Yangyong Wang +1 more
TL;DR: In this paper, the authors summarized and reviewed the various synthesizing approaches of one-dimensional nano-structured polyaniline (PANI) and several potential applications of the nanomaterial.
References
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Journal ArticleDOI
Nanotube molecular wires as chemical sensors
Jing Kong,Nathan R. Franklin,Chongwu Zhou,Michael Chapline,Shu Peng,Kyeongjae Cho,Hongjie Dai +6 more
TL;DR: The nanotubes sensors exhibit a fast response and a substantially higher sensitivity than that of existing solid-state sensors at room temperature and the mechanisms of molecular sensing with nanotube molecular wires are investigated.
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TL;DR: A relatively new method for preparing nanomaterials, membrane-based synthesis, is reviewed, which entails synthesis of the desired material within the pores of a nanoporous membrane.
Journal ArticleDOI
Carbon Nanotube Actuators
Ray H. Baughman,Changxing Cui,Anvar A. Zakhidov,Zafar Iqbal,Joseph N. Barisci,G.M. Spinks,Gordon G. Wallace,Alberto Mazzoldi,Danillo de Rossi,Andrew G. Rinzler,Oliver Jaschinski,S. Roth,Miklos Kertesz +12 more
TL;DR: Predictions based on measurements suggest that actuators using optimized nanotube sheets may eventually provide substantially higher work densities per cycle than any previously known technology.
Journal ArticleDOI
Carbon nanotube intramolecular junctions
TL;DR: In this paper, electrical transport measurements on single-wall carbon nanotubes (SWNTs) with intramolecular junctions are reported, showing that a metal-semiconductor junction behaves like a rectifying diode with nonlinear transport characteristics that are strongly asymmetric with respect to bias polarity.