Absorption-emission intensity ratio measurements in flame spectrophotometry

1968 ◽  
Vol 40 (1) ◽  
pp. 2-5
Author(s):  
Rodney K. Skogerboe ◽  
Rosemary. Todd ◽  
George Harold. Morrison
Keyword(s):  
Emission Intensity ◽  
Intensity Ratio ◽  
Flame Spectrophotometry ◽  
Emission Intensity Ratio

Optimization of Carrier Distributions in Periodic Gain Structures toward Blue VCSELs

2014 ◽  
Vol 1736 ◽  
Author(s):  
Kenjo Matsui ◽  
Kosuke Horikawa ◽  
Yugo Kozuka ◽  
Kazuki Ikeyama ◽  
Daisuke Komori ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Intermediate Layer ◽  
Intensity Ratio ◽  
Active Regions ◽  
Cavity Surface ◽  
Carrier Injection ◽  
Vertical Cavity Surface ◽  
The Difference ◽  
Emitting Lasers ◽  
Emission Intensity Ratio

ABSTRACTWe have fabricated light emitting diodes (LEDs) in which two active regions separated with a Mg-doped GaN intermediate layer were placed in a single pn junction toward periodic gain structures (PGS) for blue vertical-cavity surface emitting lasers (VCSELs). By current density dependence on a emission intensity ratio from two different active regions, we obtained a very stable emission intensity ratio over 1 kA/cm2. This result is also confirmed with the simulation result. Furthermore, we found that the difference of emission wavelength affect the carrier injection and the emission intensity ratio. On the basis of this result, the optimized well-balanced Mg concentration in the intermediate layer for the two identical active regions were estimated approximately 5 x 1018 cm-3.

scholarly journals Atomic oxygen emission intensity ratio: Observation and theory

Eos ◽  
2011 ◽  
Vol 92 (35) ◽  
pp. 291-292 ◽  
Author(s):  
Tom G. Slanger ◽  
Brian D. Sharpee ◽  
Dušan A. Pejaković ◽  
David L. Huestis ◽  
Manuel A. Bautista ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Intensity Ratio ◽  
Atomic Oxygen ◽  
Emission Intensity Ratio

scholarly journals A simple process step for tuning the optical emission and ultraviolet photosensing properties of sol–gel ZnO film

RSC Advances ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 694-703 ◽  
Author(s):  
Shuvaraj Ghosh ◽  
Durga Basak
Keyword(s):  
Emission Intensity ◽  
Intensity Ratio ◽  
Sol Gel ◽  
Optical Emission ◽  
Zno Films ◽  
Zno Film ◽  
Process Step ◽  
Simple Process ◽  
Emission Intensity Ratio

An enhanced UV/VIS emission intensity ratio and UV photoresponse have been evidenced in the rapidly cooled sol–gel ZnO films.

Luminescent molecular thermometers for the ratiometric sensing of intracellular temperature

2017 ◽  
Vol 36 (1) ◽  
Author(s):  
Seiichi Uchiyama ◽  
Chie Gota
Keyword(s):  
Gene Expression ◽  
Cell Division ◽  
Emission Intensity ◽  
Intensity Ratio ◽  
Enzyme Reaction ◽  
Living Cells ◽  
Review Article ◽  
Temperature Dependent ◽  
Molecular Thermometers ◽  
Emission Intensity Ratio

AbstractRecently, numerous luminescent molecular thermometers that exhibit temperature-dependent emission properties have been developed to measure the temperatures of tiny spaces. Intracellular temperature is the most interesting and exciting applications of luminescent molecular thermometers because this temperature is assumed to be correlated with all cell events, such as cell division, gene expression, enzyme reaction, metabolism, and pathogenesis. Among the various types of temperature-dependent emission parameters of luminescent molecular thermometers, the emission intensity ratio at two different wavelengths is suitable for accurate and accessible intracellular temperature measurements. In this review article, luminescent molecular thermometers that exhibit a temperature-dependent emission intensity ratio in living cells are summarized, and current progress in intracellular thermometry is outlined.

Aggregation enhanced excimer emission (AEEE) with efficient blue emission based on pyrene dendrimers

2016 ◽  
Vol 7 (19) ◽  
pp. 3277-3299 ◽  
Author(s):  
Alaa S. Abd-El-Aziz ◽  
Amani A. Abdelghani ◽  
Brian D. Wagner ◽  
Elsayed M. Abdelrehim
Keyword(s):  
Emission Intensity ◽  
Intensity Ratio ◽  
Blue Emission ◽  
Excimer Emission ◽  
Fluorescent Dendrimers ◽  
Dendrimer Generation ◽  
Emission Intensity Ratio

A series of fluorescent dendrimers with pyrene moieties exhibited aggregation enhanced excimer emission (AEEE). Increases in the dendrimer generation caused emission at 480 nm with a high excimer/monomer emission intensity ratio.

Amine vapor responsive lanthanide complex entrapment: control of the ligand-to-metal and metal-to-metal energy transfer

2016 ◽  
Vol 4 (11) ◽  
pp. 2165-2169 ◽  
Author(s):  
Peng Li ◽  
Huanrong Li
Keyword(s):  
Energy Transfer ◽  
Emission Intensity ◽  
Intensity Ratio ◽  
Lanthanide Complex ◽  
Emission Intensity Ratio ◽  
Co Doped

We develop a luminescent platform based on Eu3+ and Tb3+ co-doped nanozeolite to realize the probing of amine solvents. Such a luminescence sensor can classify amine solvents and achieve an excellent fingerprint correlation between the amine solvents (with larger pKa values) and the emission intensity ratio (IEu/ITb), which is ratiometric.

scholarly journals Temperature sensing in Tb3+/Eu3+-based tetranuclear silsesquioxane cages with tunable emission

RSC Advances ◽  
2021 ◽  
Vol 11 (55) ◽  
pp. 34735-34741
Author(s):  
Karina Nigoghossian ◽  
Alena N. Kulakova ◽  
Gautier Félix ◽  
Victor N. Khrustalev ◽  
Elena S. Shubina ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Emission Intensity ◽  
Intensity Ratio ◽  
Temperature Sensing ◽  
Emission Intensity Ratio ◽  
Tunable Emission

Tetranuclear silsesquioxane cages with tunable thermosensitive Tb3+-to-Eu3+ energy transfer were used for temperature sensing based on the Tb3+-to-Eu3+ emission intensity ratio (LIR) with excellent linearity and sensitivity.

Measurement of Concrete Strength Using the Emission Intensity Ratio between Ca(II) 396.8 nm and Ca(I) 422.6 nm in a Nd:YAG Laser-Induced Plasma

2006 ◽  
Vol 60 (1) ◽  
pp. 61-64 ◽  
Author(s):  
Kenichiro Tsuyuki ◽  
Satoru Miura ◽  
Nasrullah Idris ◽  
Koo Hendrik Kurniawan ◽  
Tjung Jie Lie ◽  
...  
Keyword(s):  
Nd:Yag Laser ◽  
Emission Intensity ◽  
Intensity Ratio ◽  
Concrete Strength ◽  
Laser Induced Plasma ◽  
Emission Intensity Ratio

Automation of the AOAC Flame Photometric Method for Potassium in Fertilizers

1964 ◽  
Vol 47 (3) ◽  
pp. 459-469
Author(s):  
Charles W Gehrke ◽  
James P Ussary ◽  
George H Kramer
Keyword(s):  
Ion Exchange ◽  
Emission Intensity ◽  
Intensity Ratio ◽  
Photometric Method ◽  
Automatic Method ◽  
Automatic Instrument ◽  
Considerable Saving ◽  
Analytical Time ◽  
Interfering Ions ◽  
Emission Intensity Ratio

Abstract A study was undertaken to (a) develop a simple, rapid, accurate, and automatic method for routinely determining potassium in commercial fertilizers; (b) to determine the effect of different concentrations of common interfering ions on the emission intensity ratio of potassium in KNO3 standards; (c) to eliminate the ion exchange cleanup of sample and thus simplify the method; and (d) to evaluate the automatic instrument. Phosphate was the only ion that caused a serious effect. The cleanup was found to be unnecessary for fertilizers containing less than 16% K2O, but gives more accurate results for higher concentration fertilizers. The automatic method gave accurate and precise results, and effected considerable saving in analytical time.

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