The UV‐visible emission spectra of oxygen and nitrogen in solid hydrogen and deuterium hosts

1986 ◽  
Vol 85 (3) ◽  
pp. 1247-1251 ◽  
Author(s):  
Robert L. Brooks
Keyword(s):  
Emission Spectra ◽  
Solid Hydrogen ◽  
Visible Emission ◽  
Uv Visible

UV-visible emission of (O2- - F+) centres in KBr

2007 ◽  
Vol 42 (11) ◽  
pp. 1123-1125 ◽  
Author(s):  
F. Zehani ◽  
M. Sebais
Keyword(s):  
Visible Emission ◽  
Uv Visible

scholarly journals Synthesis and Luminescent Properties of Eu3+/Tb3+ Rare Earth Ions Doped Li2SrSiO4 Phosphors

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Kaitao Yu ◽  
Lifang Wei ◽  
Jiaqi Shen
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Band ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Rare Earth Ions ◽  
Luminescent Materials ◽  
Excitation Spectra ◽  
Solid State Method ◽  
X Ray ◽  
Uv Visible

The series of luminescent materials of Eu3 +, Tb3 + doped Li2SrSiO4 were synthesized by a high-temperature solid-state method. The phase purity of the samples was measured by X-ray powder diffraction (XRD). The luminescent properties of the samples were studied by UV-visible excitation spectra and emission spectra The It is found that the strong absorption of Eu3 + doped Li2-xSr1-xEuxSiO4 is from the 250 ~ 290 nm charge transfer band of Eu3 + and the 7F0 → 5L6 absorption transition of 393 nm. The strongest emission of the emission spectra at 393 nm is 614 nm and 701 nm, respectively, from the 5D0 → 7F2 and 5D0 → 7F4 transitions of Eu3 +. Tb3 + doped sample Li2-xSr1-xTb xSiO4 excitation spectrum is mainly composed of Tb3 + ion fd transition and charge transfer band composed of broadband, the strongest absorption at 269 nm, the emission of the main emission of 5D4 → 7F5 transition (542 nm).

Direct Interaction of Colloidal Nanostructured ZnO and SnO2 with NO and SO2

2008 ◽  
Vol 8 (12) ◽  
pp. 6389-6397 ◽  
Author(s):  
D. Velasco-Arias ◽  
D. Díaz ◽  
P. Santiago-Jacinto ◽  
G. Rodríguez-Gattorno ◽  
A. Vázquez-Olmos ◽  
...  
Keyword(s):  
Electronic Absorption ◽  
Room Temperature ◽  
Emission Spectra ◽  
Direct Interaction ◽  
X Ray Diffraction ◽  
Wurtzite Phase ◽  
X Ray ◽  
Spontaneous Hydrolysis ◽  
Uv Visible ◽  
Hydrolysis Of

A novel and easy synthesis pathway of small SnO2 nanoparticles is reported. The method consists of the spontaneous hydrolysis of SnCl4·5H2O in dimethyl sulfoxide (DMSO), containing 3% water, at room temperature. The structure of the SnO2 nanocrystals corresponds to that of the cassiterite phase, as shown by powder X-ray diffraction and HR-TEM. The UV-visible electronic absorption and emission spectra of the SnO2 colloids are discussed. The reactions of NO(g) and SO2(g) with ZnO (wurtzite phase) and SnO2 nanocolloids are studied. The interaction of NO with ZnO nanoparticles generates the dissolution of the particles and it is quite probable that NO−13, NO−12, N2O and N2 are formed; while its contact with SO2 probably yields SO−24, SO−23 and also the dissolution of the particles is observed. When these gases are reacted with SnO2, then NO−13, NO−12, SO−23 and SO−24, were respectively obtained.

Ce–surfactant lamellar assemblies with strong UV/visible emission and controlled nanostructures

2012 ◽  
Vol 22 (38) ◽  
pp. 20358 ◽  
Author(s):  
Takaaki Taniguchi ◽  
Makoto Echikawa ◽  
Yuki Naito ◽  
Hikaru Tateishi ◽  
Asami Funatsu ◽  
...  
Keyword(s):  
Visible Emission ◽  
Uv Visible

scholarly journals Visible emission spectra of thermographic phosphors under x-ray excitation

2021 ◽  
Author(s):  
Eric Robert Westphal ◽  
Alex D Brown ◽  
Enrico C Quintana ◽  
Alan L Kastengren ◽  
Stephen F Son ◽  
...  
Keyword(s):  
Emission Spectra ◽  
Visible Emission ◽  
X Ray ◽  
Thermographic Phosphors

scholarly journals Optical Studies of Organically Functionalized Mn doped ZnS Quantum Dots

2021 ◽  
Vol 33 (12) ◽  
pp. 2972-2976
Author(s):  
Anju Bala ◽  
Rajeev Sehrawat ◽  
Renu Bala ◽  
Ashutosh Dixit
Keyword(s):  
Quantum Dots ◽  
Quantum Confinement Effect ◽  
Emission Spectra ◽  
Blue Shift ◽  
Capping Agent ◽  
X Ray Diffraction ◽  
Tem Analysis ◽  
Transmission Electron ◽  
Uv Visible ◽  
Mn Doped

Organically functionalized manganese doped zinc sulfide (ZnS/Mn) quantum dots were prepared by simple chemical method with polypyrrole (PPy) used as a capping agent. Prepared quantum dots were characterized with Fourier transform infrared spectroscopy (FTIR), high resolution transmission electron microscopy (HR-TEM), X-ray diffraction microscope (XRD), UV-visible spectroscopy and photoluminescence spectroscopy. Crystalline size of PPy capped ZnS/Mn quantum dots for various concentrations of PPy were approximate 2 nm as analyzed by XRD and TEM analysis. The absorption spectra revealed the occurrence of a blue shift in the peak of absorption and an increase in the band gap value due to the quantum confinement effect. FTIR spectroscopy confirmed that shifting of broad peak at 2335.8 cm–1 was due to S-H stretching vibrations, which confirmed interaction of hydrogen and sulphur in ZnS/Mn/PPy nanocomposites. Uncapped ZnS/Mn and PPy capped ZnS/Mn quantum dots reveal the effective photoluminescence emission spectra in the range of 300-700 nm. With increase the value of capping agent in ZnS/Mn quantum dots, photoluminescence spectra going to red shifting. The photoluminescence properties of the organically functionalized ZnS nanoparticles are favourable for the application in optoelectronic devices.

ZnO Nanostructures – Nanorods and Flower-Like on Si/Au Substrates by Solution-Immersion Method in Different pH of Precursor

2013 ◽  
Vol 667 ◽  
pp. 86-92 ◽  
Author(s):  
Zuraida Khusaimi ◽  
Mohamad Hafiz Mamat ◽  
Norbani Abdullah ◽  
Mohamad Rusop
Keyword(s):  
Zno Nanorods ◽  
Emission Spectra ◽  
Precursor Solution ◽  
Considerable Effect ◽  
Zinc Nitrate ◽  
Visible Emission ◽  
Nitrate Hexahydrate ◽  
Zno Nanostructures ◽  
Immersion Method ◽  
Solution Ph

Low-temperature solution immersion growth of low-dimensional ZnO nanostructures on gold-seeded Si substrate has been demonstrated. pH environment of the precursor solution, Zn(NO3)2.6H2O (zinc nitrate hexahydrate) and C6H12N4 (HMTA) was found to have considerable effect to ZnO morphology and photoluminescence. Structural, morphological and photoluminescence (PL) properties of the samples were obtained from XRD, SEM and PL-Raman characterisation. A near neutral (pH = 6.8) and acidic (pH = 5) precursor solution aided a dense near-aligned ZnO nanorods growth with smallest rods diameter of 30 and 20 nm respectively. Whereas alkaline precursor solution (pH = 9) gave rise to flower-like structures of ZnO. Chemical equations for the reactions and the role of H+ and OH- ions role in affecting the XRD diffraction peaks and morphology, are suggested. Room temperature PL emission spectra of ZnO were collected after excitation at 325 nm. UV and visible emission distinctive of ZnO were formed and the rationale for significant shifts of the visible emission was also discussed.

The visible band systems of SnH+ and SnD+

1986 ◽  
Vol 64 (6) ◽  
pp. 700-706 ◽  
Author(s):  
Sumio Yamaguchi ◽  
Hiroshi Obase ◽  
Masaharu Tsuji ◽  
Yukio Nishimura
Keyword(s):  
Emission Spectra ◽  
Previous Measurement ◽  
Visible Emission ◽  
Spectroscopic Constants ◽  
Visible Band ◽  
First Time

Visible emission spectra of SnH+ and SnD+ produced from the helium afterglow reactions of SnH4 and SnD4, respectively, have been recorded under higher resolution than the previous measurement. In addition to the three bands reported previously, three new bands of [Formula: see text] have been identified, while eleven bands of [Formula: see text] have been observed for the first time. Spectroscopic constants of the [Formula: see text] and X1Σ+ states have been improved for SnH+ and determined for SnD+.

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