Fluorescence decay characteristic of Tm-doped YAG crystal fiber for sensor applications, investigated from room temperature to 1400 °C

2003 ◽  
Vol 3 (4) ◽  
pp. 507-512 ◽  
Author(s):  
Yonghang Shen ◽  
Weizhong Zhao ◽  
Jinglei He ◽  
Tong Sun ◽  
K.T.V. Grattan
Keyword(s):  
Room Temperature ◽  
Fluorescence Decay ◽  
Decay Characteristic ◽  
Sensor Applications ◽  
Crystal Fiber

Unraveling Hydrogen Adsorption Kinetics of Bimetallic Au–Pt Nanoisland-Functionalized Carbon Nanofibers for Room-Temperature Gas Sensor Applications

2020 ◽  
Vol 124 (13) ◽  
pp. 7144-7155 ◽  
Author(s):  
Keerthi G. Nair ◽  
Vishnuraj Ramakrishnan ◽  
Rajesh Unnathpadi ◽  
Karthikeyan. K. Karuppanan ◽  
Biji Pullithadathil
Keyword(s):  
Gas Sensor ◽  
Carbon Nanofibers ◽  
Adsorption Kinetics ◽  
Room Temperature ◽  
Hydrogen Adsorption ◽  
Sensor Applications ◽  
Kinetics Of

scholarly journals Room temperature sol-gel fabrication and functionalization for sensor applications

2012 ◽  
Vol 3 (2) ◽  
pp. 168-177 ◽  
Author(s):  
George Huyang ◽  
John Canning ◽  
Ingemar Petermann ◽  
David Bishop ◽  
Andrew McDonagh ◽  
...  
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Sensor Applications

Characteristic Investigations of Stoichiometric LiNbO3 Single Crystal Fiber Co-Doped with Tb and Mn

2004 ◽  
Vol 449-452 ◽  
pp. 985-988
Author(s):  
S.M. Lee ◽  
J.W. Shur ◽  
T.I. Shin ◽  
W.S. Yang ◽  
G.Y. Kim ◽  
...  
Keyword(s):  
Absorption Band ◽  
Single Crystal ◽  
Optical Microscopy ◽  
Single Crystals ◽  
Absorption Spectra ◽  
Room Temperature ◽  
Crystal Fiber ◽  
Ft Ir ◽  
Homogeneous Distributions ◽  
Co Doped

[MnO2(1.0mol%) : Tb4O7(0.5mo%)] doped stoichiometric LiNbO3 (Mn:Tb:SLN) single crystals of 0.5~1.0 mm in diameter and 30~35 mm in length were grown by micro pulling down(µ-PD) method. We investigated the photoluminescence (PL) properties of Mn:Tb:SLN single crystal. The OH- absorption band of the single crystals observed infrared the absorption spectra by using an FT-IR spectrophotometer at room temperature. Homogeneous distributions of Mn and Tb concentration were confirmed by the EPMA and observed defects by optical microscopy.

scholarly journals Photosensitive Organic-Inorganic Hybrid Materials for Room Temperature Gas Sensor Applications

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 671 ◽  
Author(s):  
Marina Rumyantseva ◽  
Abulkosim Nasriddinov ◽  
Svetlana Vladimirova ◽  
Sergey Tokarev ◽  
Olga Fedorova ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Room Temperature ◽  
Single Point ◽  
Red Light ◽  
Chemical Precipitation ◽  
Sensor Applications ◽  
Semiconductor Oxides ◽  
Ms Analysis ◽  
Vis Spectroscopy ◽  
Homo And Lumo

In this work, the hybrids based on nanocrystalline SnO2 or In2O3 semiconductor matrixes and heterocyclic Ru(II) complex are studied as materials for gas sensors operating at room temperature under photoactivation with visible light. Nanocrystalline semiconductor oxides are obtained by chemical precipitation with subsequent thermal annealing and characterized by XRD, SEM and single-point BET methods. The heterocyclic Ru(II) complex is synthesized for the first time and investigated by 1H NMR, 13C NMR APT, MALDI-MS analysis, and UV-Vis spectroscopy. The HOMO and LUMO energies of the Ru(II) complex are calculated from cyclic voltammetry data. The hybrid materials are characterized by TGA-MS analysis and EDX mapping. The optical properties of hybrids are studied by UV-Vis spectroscopy in the diffuse reflection mode. The investigation of spectral dependencies of photoconductivity of hybrid samples demonstrates that the role of organic dye consists in shifting the photosensitivity range towards longer wavelengths. Sensor measurements demonstrate that hybrid materials are able to detect NO2 in the concentration range of 0.25–2 ppm without the use of thermal heating under periodic illumination with even low-energy long-wavelength (red) light.

A simple and template free synthesis of branched ZnO nanoarchitectures for sensor applications

RSC Advances ◽  
2014 ◽  
Vol 4 (109) ◽  
pp. 64075-64084 ◽  
Author(s):  
Ganesh Kumar Mani ◽  
John Bosco Balaguru Rayappan
Keyword(s):  
Room Temperature ◽  
Sensor Applications ◽  
Simple Chemical ◽  
Chemical Technique ◽  
Template Free

Branched ZnO nanoarchitectures synthesized by a simple chemical technique and used as a room temperature acetaldehyde sensor.

INVESTIGATION OF STRUCTURAL, OPTICAL, AND DIELECTRIC PROPERTIES OF PVA-KI FOR TEMPERATURE SENSOR APPLICATIONS

2019 ◽  
Vol 26 (09) ◽  
pp. 1950054
Author(s):  
T. A. HANAFY ◽  
I. T. ZEDAN ◽  
A. E. BEKHEET
Keyword(s):  
Dielectric Constant ◽  
Temperature Sensor ◽  
Room Temperature ◽  
Energy Gap ◽  
Optical Measurements ◽  
Index Formula ◽  
Optical Parameters ◽  
Optical Energy Gap ◽  
Sensor Applications ◽  
Loss Index

Polyvinyl alcohol (PVA) films doped with potassium iodide (KI) have been prepared by casting from their aqueous solutions. The structure of the doped samples was investigated using Fourier transform infrared spectroscopy. The addition of KI to PVA structure leads to form crosslinking as well as the increase of the amorphous ratio within the investigated sample. The optical measurements were recorded at room temperature in the range of 200–2500[Formula: see text]nm. It was found that the optical energy gap of the investigated sample increases with increasing KI ratio. The effect of the addition increment of KI on the optical parameters of PVA has been investigated. Dielectric spectra of PVA doped with KI were studied in the temperature and the frequency ranges of 303–373[Formula: see text]K and 100[Formula: see text]Hz–5[Formula: see text]MHz, respectively. The behavior of dielectric constant ([Formula: see text]) and dielectric loss index ([Formula: see text]) of PVA sample doped with KI exhibits good linearity with temperature. The obtained results suggest strongly the applicability of these materials in the temperature sensor applications.

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