Transition Metal and Conducting Polymers Nanocomposite for Sensing of Environmental Gases

2022 ◽  
pp. 471-487
Author(s):  
Chandra Shekhar Kushwaha ◽  
Pratibha Singh ◽  
Saroj Kr Shukla
Keyword(s):  
Transition Metal ◽  
Conducting Polymers

Toward transparent molecular wires: electron and energy transfer in transition metal derivatized conducting polymers

1998 ◽  
Vol 171 ◽  
pp. 365-386 ◽  
Author(s):  
Biwang Jiang ◽  
Szu Wei Yang ◽  
Scott L. Bailey ◽  
Leone G. Hermans ◽  
Ross A. Niver ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Transition Metal ◽  
Conducting Polymers ◽  
Molecular Wires

MULTIWALLED CARBON NANOTUBES BASED NANOCOMPOSITES FOR SUPERCAPACITORS: A REVIEW OF ELECTRODE MATERIALS

NANO ◽  
2012 ◽  
Vol 07 (02) ◽  
pp. 1230002 ◽  
Author(s):  
MEISAM VALIZADEH KIAMAHALLEH ◽  
SHARIF HUSSEIN SHARIF ZEIN ◽  
GHASEM NAJAFPOUR ◽  
SUHAIRI ABD SATA ◽  
SURANI BUNIRAN
Keyword(s):  
Carbon Nanotubes ◽  
Transition Metal ◽  
Conducting Polymers ◽  
Metal Oxides ◽  
Multiwalled Carbon Nanotubes ◽  
Transition Metal Oxides ◽  
Electrode Materials ◽  
Mass Density ◽  
High Mass ◽  
Multiwalled Carbon

Electrode materials are the most important factors to verify the properties of the electrochemical supercapacitor. In this paper, the storage principles and characteristics of electrode materials, including carbon-based materials, transition metal oxides and conducting polymers for supercapacitors are depicted in detail. Other factors such as electrode separator and electrolyte are briefly investigated. Recently, several works are conducted on application of multiwalled carbon nanotubes (MWCNTs) and MWCNTs-based electrode materials for supercapacitors. MWCNTs serve in experimental supercapacitor electrode materials result in specific capacitance (SC) value as high as 135 Fg-1. Addition of pseudocapacitive materials such as transition metal oxides and conducting polymers in the MWCNTs results in electrochemical performance improvement (higher capacitance and conductivity). The nanocomposites of MWCNTs and pseudocapacitive materials are the most promising electrode materials for supercapacitors because of their good electrical conductivity, low cost and high mass density.

scholarly journals Semiconductor Gas Sensors: Materials, Technology, Design, and Application

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6694
Author(s):  
Maria Vesna Nikolic ◽  
Vladimir Milovanovic ◽  
Zorka Z. Vasiljevic ◽  
Zoran Stamenkovic
Keyword(s):  
Carbon Nanotubes ◽  
Transition Metal ◽  
Conducting Polymers ◽  
Metal Oxides ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Operating Temperature ◽  
2D Materials ◽  
Semiconductor Materials ◽  
Technology Design

This paper presents an overview of semiconductor materials used in gas sensors, their technology, design, and application. Semiconductor materials include metal oxides, conducting polymers, carbon nanotubes, and 2D materials. Metal oxides are most often the first choice due to their ease of fabrication, low cost, high sensitivity, and stability. Some of their disadvantages are low selectivity and high operating temperature. Conducting polymers have the advantage of a low operating temperature and can detect many organic vapors. They are flexible but affected by humidity. Carbon nanotubes are chemically and mechanically stable and are sensitive towards NO and NH3, but need dopants or modifications to sense other gases. Graphene, transition metal chalcogenides, boron nitride, transition metal carbides/nitrides, metal organic frameworks, and metal oxide nanosheets as 2D materials represent gas-sensing materials of the future, especially in medical devices, such as breath sensing. This overview covers the most used semiconducting materials in gas sensing, their synthesis methods and morphology, especially oxide nanostructures, heterostructures, and 2D materials, as well as sensor technology and design, application in advance electronic circuits and systems, and research challenges from the perspective of emerging technologies.

The use of conducting polymers as cathodes for the electrochemical deposition of magnetic transition metal/rare earth alloys

2000 ◽  
Vol 10 (3) ◽  
pp. 729-735 ◽  
Author(s):  
L. Martinot ◽  
D. Leroy ◽  
H. Zhan ◽  
C. Licour ◽  
C. Jérôme ◽  
...  
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Conducting Polymers ◽  
Electrochemical Deposition ◽  
Magnetic Transition ◽  
Rare Earth Alloys

Synthesis and properties of conducting polymers from propargylammonium salts by transition metal catalysts

1995 ◽  
Vol 69 (1-3) ◽  
pp. 549-550 ◽  
Author(s):  
Y.S. Gal ◽  
B. Jung ◽  
W.C. Lee ◽  
S.K. Choi
Keyword(s):  
Transition Metal ◽  
Conducting Polymers ◽  
Metal Catalysts ◽  
Transition Metal Catalysts

ChemInform Abstract: Toward Transparent Molecular Wires: Electron and Energy Transfer in Transition Metal Derivatized Conducting Polymers

ChemInform ◽  
2010 ◽  
Vol 29 (37) ◽  
pp. no-no
Author(s):  
B. JIANG ◽  
S. W. YANG ◽  
S. L. BAILEY ◽  
L. G. HERMANS ◽  
R. A. NIVER ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Transition Metal ◽  
Conducting Polymers ◽  
Molecular Wires

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

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