Non-covalent functionalization of CNTs with polycarbazole: a chemiresistive humidity sensor with tunable chemo-electric attributes at room temperature

2018 ◽  
Vol 42 (9) ◽  
pp. 6918-6931 ◽  
Author(s):  
Madhurima Das ◽  
Saptarshi Ghosh ◽  
Somenath Roy
Keyword(s):  
Room Temperature ◽  
Humidity Sensor ◽  
Oxidative Polymerization ◽  
Multiwall Carbon Nanotubes ◽  
Chemical Oxidative Polymerization ◽  
Humidity Sensors ◽  
Covalent Functionalization ◽  
Polymerization Method ◽  
Multiwall Carbon

This article describes the non-covalent functionalization of multiwall carbon nanotubes (MWCNTs) with polycarbazole (PCz) via an in situ chemical oxidative polymerization method and subsequent fabrication of resistive humidity sensors.

Ultra-sensitive polyaniline–iron oxide nanocomposite room temperature flexible ammonia sensor

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68964-68971 ◽  
Author(s):  
D. K. Bandgar ◽  
S. T. Navale ◽  
M. Naushad ◽  
R. S. Mane ◽  
F. J. Stadler ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Room Temperature ◽  
Oxidative Polymerization ◽  
Ammonia Sensor ◽  
Chemical Oxidative Polymerization ◽  
First Time ◽  
Polymerization Method ◽  
Pet Substrate

We report for the first time a room temperature smart NH3sensor based on PAni–Fe2O3nanocomposite loading on flexible PET substrate byin situchemical oxidative polymerization method.

scholarly journals Synthesis and Physical Characterization of Carbon Nanotubes Coated by Conducting Polypyrrole

2011 ◽  
Vol 364 ◽  
pp. 50-54 ◽  
Author(s):  
Afarin Bahrami ◽  
Z.A. Talib ◽  
W. Mahmood Mat Yunus ◽  
Kasra Behzad ◽  
Nayereh Soltani
Keyword(s):  
Carbon Nanotubes ◽  
Oxidative Polymerization ◽  
Feed Ratio ◽  
Multiwall Carbon Nanotube ◽  
Chemical Oxidative Polymerization ◽  
Conducting Polypyrrole ◽  
Multiwall Carbon ◽  
Thermal Stability Of

This study describes the preparation of polypyrrole multiwall carbon nanotube (PPy/MWNT) composites by in situ chemical oxidative polymerization. Various ratios of functionalized MWNTs are dispersed in the water, and PPy are then synthesized via in-situ chemical oxidative polymerization on the surface of the carbon nanotubes. The morphology of the resulting complex nanotubes (MWNT-PPY) was characterized by field-emission scanning electron microscopy (FESEM). The conductivity of each composite showed a maximum in the temperature scale of 120 – 160 °C and then decreased dramatically with the increase of temperature. The resultant PPy/MWNT nanotubes enhanced electrical conductivity and thermal stability of nanocomposite compared to PPy which was strongly influenced by the feed ratio of pyrrole to MWNTs.

Well-Defined Blackberry-Like Polypyrrole Microspheres via Chemical Oxidative Polymerization in the Presence of Functional Floating Bead as In Situ Dopant

2014 ◽  
Vol 904 ◽  
pp. 159-163 ◽  
Author(s):  
Jia Ping Lao ◽  
Chao Yang ◽  
Hao Dao Mo ◽  
Yu Ping Li ◽  
Li Min Zang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Electrical Conductivity ◽  
Sulfonic Acid ◽  
Room Temperature ◽  
Oxidative Polymerization ◽  
High Electrical Conductivity ◽  
Chemical Oxidative Polymerization ◽  
Inorganic Substrate ◽  
Thermal Stability Of

Functional floating bead (F-FB), prepared by anchoring the organic sulfonic acid on the surface of the blackberry-like structural FB, was used as both the inorganic substrate and the in situ dopant for the in situ chemical oxidative polymerization of pyrrole to obtain the plypyrrole/functional floating bead (PPy/F-FB) nanocomposite material. The composites possess high electrical conductivity at room temperature. Thermogravimetric analysis shows that the thermal stability of PPy/F-FB composites was enhanced and these can be attributed to the retardation effect of sulfonic acid-functionalized FB as barriers for the degradation of PPy. The morphology of PPy/FB composites showed the well-defined blackberry-like morphology.

Ultrasensitive room temperature NH3 sensor based on a graphene–polyaniline hybrid loaded on PET thin film

2015 ◽  
Vol 51 (35) ◽  
pp. 7524-7527 ◽  
Author(s):  
Shouli Bai ◽  
Yangbo Zhao ◽  
Jianhua Sun ◽  
Ye Tian ◽  
Ruixian Luo ◽  
...  
Keyword(s):  
Thin Film ◽  
Room Temperature ◽  
Oxidative Polymerization ◽  
High Sensitivity ◽  
Fast Response ◽  
Chemical Oxidative Polymerization ◽  
Nh3 Sensor ◽  
First Time

A room temperature smart NH3 sensor based on rGO–PANI hybrid loading on flexible PET thin film prepared by in situ chemical oxidative polymerization is reported for the first time. The sensor not only exhibits high sensitivity, good selectivity and fast response but also has flexibility, is inexpensive and has wearable characteristics.

Poly (N-ethyl aniline)/Ag Nanocomposite as Humidity Sensor

2017 ◽  
Vol 16 (03) ◽  
pp. 1650037 ◽  
Author(s):  
Nishigandh S. Pande ◽  
Dipika Jaspal ◽  
Jalindar Ambekar
Keyword(s):  
Room Temperature ◽  
Oxidative Polymerization ◽  
Single Step ◽  
Infrared Analysis ◽  
X Ray Diffraction ◽  
Humid Atmosphere ◽  
Vis Spectroscopy ◽  
Uv Visible ◽  
Polymerization Method

Poly (N-ethyl aniline)/Ag organic–inorganic composite has been synthesized by a single step in situ chemical oxidative polymerization method. The synthesis of Poly (N-ethyl aniline)/Ag nanocomposite has been confirmed by X-ray diffraction (XRD), Ultraviolet-Vis Spectroscopy (UV-visible), Fourier transform infrared analysis (FTIR) and FE-SEM investigations. XRD spectral study exhibited major diffraction in the range 20–80[Formula: see text] (2[Formula: see text]) and indicated the semicrystalline nature of poly (N-ethyl aniline)/Ag nanocomposite. Characteristic peaks in UV-visible and FTIR spectra of poly (N-ethyl aniline) switched to higher wave numbers in poly (N-ethyl aniline)/Ag nanocomposite. Peaks at 1789[Formula: see text]cm[Formula: see text], 1595[Formula: see text]cm[Formula: see text], 667[Formula: see text]cm[Formula: see text] and 501[Formula: see text]cm[Formula: see text] in FTIR spectrum confirmed the formation of poly (N-ethyl aniline)/Ag nanocomposite. FE-SEM photographs reported agglomerated granular particulate nature of poly (N-ethyl aniline)/Ag nanocomposite. Synthesized poly (N-ethyl aniline)/Ag nanocomposite exhibited a high response to humidity, good reproducibility and stability at room temperature. An appreciable response was shown in the presence of 40% humid atmosphere for up to successive four cycles. Composite sensitivity has been found to increase with the increasing concentration of humidity, at room temperature.

Electrical Properties of Electrospun Flexible and Stretchable PVDF/PANI Nanoropes

2014 ◽  
Vol 687-691 ◽  
pp. 4218-4222
Author(s):  
Wei Hua Han ◽  
Yong Wan ◽  
Bin Sun ◽  
Yun Ze Long ◽  
Qing Chang ◽  
...  
Keyword(s):  
Tensile Strain ◽  
Vinylidene Fluoride ◽  
Oxidative Polymerization ◽  
Polymerization Process ◽  
Chemical Oxidative Polymerization ◽  
Electrospinning Technique ◽  
Poly Vinylidene Fluoride ◽  
Polymerization Method ◽  
Pani Layer

Aligned poly (vinylidene fluoride) (PVDF) nanofibers and the nanoropes have been fabricated via a novel electrospinning technique. And then conducting polyaniline (PANI) was coated on the surfaces of the nanoropes using an in situ chemical oxidative polymerization method. It is found that the conductivity increased drastically at first and then tended to be saturation in the polymerization process. In addition, the flexibility and stretchability of the composites have been measured: With an increase of bending curvature and tensile strain, the conductivity rose at the beginning because the fibers among the nanoropes get tight; and then the conductivity dropped, which may due to the PANI layer broke and becomes discontinuous with the adding stress.

scholarly journals Impact of rare-earth metal oxide (Eu2O3) on the electrochemical properties of a polypyrrole/CuO polymeric composite for supercapacitor applications

RSC Advances ◽  
2017 ◽  
Vol 7 (32) ◽  
pp. 20037-20048 ◽  
Author(s):  
Mandira Majumder ◽  
Ram Bilash Choudhary ◽  
Anukul. K. Thakur ◽  
Indrapal Karbhal
Keyword(s):  
Oxidative Polymerization ◽  
Earth Metal ◽  
Polymeric Composite ◽  
Europium Oxide ◽  
Chemical Oxidative Polymerization ◽  
Ternary Composite ◽  
Rare Earth Metal Oxide ◽  
Polymerization Method ◽  
Supercapacitor Applications

A ternary composite of polypyrrole/copper oxide/europium oxide (PPY/CuO/Eu2O3), synthesized via a facile in situ chemical oxidative polymerization method, exhibits the maximum specific capacitance of 320 F g−1 at the current density of 1 A g−1.

Fibrous polyaniline@manganese oxide nanocomposites as supercapacitor electrode materials and cathode catalysts for improved power production in microbial fuel cells

2016 ◽  
Vol 18 (13) ◽  
pp. 9053-9060 ◽  
Author(s):  
Sajid Ali Ansari ◽  
Nazish Parveen ◽  
Thi Hiep Han ◽  
Mohammad Omaish Ansari ◽  
Moo Hwan Cho
Keyword(s):  
Microbial Fuel Cells ◽  
Electrode Materials ◽  
Oxidative Polymerization ◽  
Chemical Oxidative Polymerization ◽  
Supercapacitor Electrode ◽  
Cathode Catalysts ◽  
One Step ◽  
Supercapacitor Electrode Materials ◽  
Polymerization Method

Fibrous Pani–MnO2 nanocomposites were prepared using a one-step and scalable in situ chemical oxidative polymerization method.

Zinc Oxide/Polyaniline Transparent Conductive Film Prepared by In Situ Polymerization Deposition

2014 ◽  
Vol 997 ◽  
pp. 368-370
Author(s):  
Ping Zhong ◽  
Lin Xiu Cheng ◽  
Xing Lu
Keyword(s):  
Zinc Oxide ◽  
Oxidative Polymerization ◽  
Optimal Conditions ◽  
Chemical Oxidative Polymerization ◽  
Reaction Conditions ◽  
Transparent Conductive Film ◽  
Conductive Film

In this paper，ZnO/PANI transparent conductive film has been prepared by in situ chemical oxidative polymerization, APS as an oxidant. The conductivity and transmittance of ZnO/PANI was measured. It has been investigated of the effects of reaction conditions and the doping component on conductivity, transmissivity and adhesion. With the increase of doping ZnO, the conductivity of ZnO/PANI transparent conductive film, transmittance and adhesion reduced. The optimal conditions is that the concentration of An, APS and PVA are 0.75 mol / L, 0.8 mol / L and 0.5wt%, respectively.

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