Structural and optical properties of Mn2O3 nanoparticles & its gas sensing applications

2016 ◽  
Vol 1 (2) ◽  
pp. 220-225 ◽  
Author(s):  
Shiva Sharma
Keyword(s):  
Optical Properties ◽  
Gas Sensing ◽  
Structural And Optical Properties ◽  
Sensing Applications ◽  
Mn2o3 Nanoparticles

scholarly journals Structural and optical properties of SnO2–Al2O3 nanocomposite synthesized via sol-gel route

2015 ◽  
Vol 33 (4) ◽  
pp. 714-718 ◽  
Author(s):  
Neeraj K. Mishra ◽  
Chaitnaya Kumar ◽  
Amit Kumar ◽  
Manish Kumar ◽  
Pratibha Chaudhary ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Optical Properties ◽  
Sol Gel ◽  
Physical Interaction ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Sensing Applications ◽  
Scanning Electron

AbstractA nanocomposite of 0.5SnO2–0.5Al2O3 has been synthesized using a sol-gel route. Structural and optical properties of the nanocomposite have been discussed in detail. Powder X-ray diffraction and scanning electron microscopy with energy-dispersive X-ray diffraction spectroscopy confirm the phase purity and the particle size of the 0.5SnO2–0.5Al2O3 nanocomposite (13 to 15 nm). The scanning electron microscopy also confirms the porosity in the sample, useful in sensing applications. The FT-IR analysis confirms the presence of physical interaction between SnO2 and Al2O3 due to the slight shifting and broadening of characteristic bands. The UV-Vis analysis confirms the semiconducting nature because of direct transition of electrons into the 0.5SnO2–0.5Al2O3 nanocomposites.

First-principles exploration of oxygen vacancy impact on electronic and optical properties of ABO3−δ (A = La, Sr; B = Cr, Mn) perovskites

2020 ◽  
Vol 22 (46) ◽  
pp. 27163-27172
Author(s):  
Jongwoo Park ◽  
Yu-Ning Wu ◽  
Wissam A. Saidi ◽  
Benjamin Chorpening ◽  
Yuhua Duan
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Oxygen Vacancy ◽  
First Principles ◽  
Oxygen Vacancies ◽  
Gas Sensing ◽  
Optical Responses ◽  
Sensing Applications ◽  
Optical Gas Sensing ◽  
The Impact

We explore via first-principles the impact of oxygen vacancies on the electronic structure and optical responses of ABO3−δ (A = La, Sr; B = Cr, Mn) perovskites, which provides a reference for optical gas sensing applications.

scholarly journals A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1265
Author(s):  
Federico Bruno ◽  
Alice Sciortino ◽  
Gianpiero Buscarino ◽  
Maria Laura Soriano ◽  
Ángel Ríos ◽  
...  
Keyword(s):  
Optical Properties ◽  
Carbon Dots ◽  
Carbon Nanodots ◽  
Fluorescent Nanoparticles ◽  
Mercury Ions ◽  
Top Down ◽  
Structural And Optical Properties ◽  
Bottom Up ◽  
Interaction Sites ◽  
Sensing Applications

We report a study of carbon dots produced via bottom-up and top-down routes, carried out through a multi-technique approach based on steady-state fluorescence and absorption, time-resolved fluorescence spectroscopy, Raman spectroscopy, infrared spectroscopy, and atomic force microscopy. Our study focuses on a side-to-side comparison of the fundamental structural and optical properties of the two families of fluorescent nanoparticles, and on their interaction pathways with mercury ions, which we use as a probe of surface emissive chromophores. Comparison between the two families of carbon dots, and between carbon dots subjected to different functionalization procedures, readily identifies a few key structural and optical properties apparently common to all types of carbon dots, but also highlights some critical differences in the optical response and in the microscopic mechanism responsible of the fluorescence. The results also provide suggestions on the most likely interaction sites of mercury ions at the surface of carbon dots and reveal details on mercury-induced fluorescence quenching that can be practically exploited to optimize sensing applications of carbon dots.

scholarly journals Novel Co-Precipitation method for synthesis of Nanostructured Nickel Oxide in accordance to PH: Structural and Optical Properties as an Active optical filter

2019 ◽  
Vol 32 (1) ◽  
pp. 1
Author(s):  
Zehraa Najim Abdul-ameer
Keyword(s):  
Optical Properties ◽  
Nickel Oxide ◽  
Average Particle Size ◽  
Optical Filter ◽  
Precipitation Method ◽  
Average Particle ◽  
Structural And Optical Properties ◽  
Morphological Studies ◽  
Sensing Applications ◽  
Co Precipitation

      Low cost Co-Precipitation  method was used for Preparation of novel nickel oxide (NiO) nano particle thin films with Simple, with two different PH values 6, 12 and its effect on structural and optical properties as an active optical filter. Experimental results of structural properties X-ray diffraction (XRD) showed that both Nickel oxide nanoparticles with (PH=6 and 12) have polycrystalline structure smaller average particle size about 8.5 nm for PH=6 in comparison with PH=12. Morphological studies using Scanning electron microscopy (SEM) and  atomic force microscope (AFM)  show uniform nano rod distribution for PH=6 with smaller average diameter, average roughness as compared with NiO with PH=12 that showed larger diameter ,grain size , spherical shape with scope of excellent sensing applications due to high roughness .Optical properties results  Show blue shift for PH=6 as compared with PH=12m leading to potential of optoelectronic applications and as active optical

Tailoring and optimization of optical properties of CdO thin films for gas sensing applications

2018 ◽  
Vol 535 ◽  
pp. 314-318 ◽  
Author(s):  
Jeevitesh K. Rajput ◽  
Trilok K. Pathak ◽  
V. Kumar ◽  
H.C. Swart ◽  
L.P. Purohit
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Gas Sensing ◽  
Sensing Applications ◽  
Cdo Thin Films
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