In-situ monitoring and characterization of plug flow crystallizers

2012 ◽  
Vol 77 ◽  
pp. 105-111 ◽  
Author(s):  
Steven Ferguson ◽  
Gary Morris ◽  
Hongxun Hao ◽  
Mark Barrett ◽  
Brian Glennon
Keyword(s):  
Plug Flow ◽  
In Situ Monitoring

Photoreflectance Characterization of the Semi-Insulating InP Substrate Interface with InGaAs and InAlAs Epilayers

1992 ◽  
Vol 281 ◽  
Author(s):  
Weimin Zhou ◽  
H. Shen ◽  
J. Pamulapati ◽  
M. Dutta ◽  
B. R. Bennett ◽  
...  
Keyword(s):  
Electron Transition ◽  
In Situ Monitoring ◽  
Signal Phase ◽  
Mbe Growth ◽  
Substrate Interface ◽  
Inp Substrate ◽  
Excitonic Transition ◽  
Inp Substrates

ABSTRACTPhotoreflectance (PR) has been performed on a series of undoped and n-type, InGaAs and InAlAs molecular beam epitaxy (MBE) grown layers with different In mole fractions, and epilayer thicknesses on Fe-doped semi-insulating (SI)-InP substrates. From investigations of the temperature dependence, time constant dependence and an additional cw light beam intensity dependence, three substrate peaks are identified as an excitonic transition from the substrate, a free electron transition near the interface which gives a Franz-Keldysh oscillation (KFO), and a transition from the spin-orbit split-off valence band. The results are indicative of a redistribution of charge near the substrate interface in the process of MBE growth; the associated PR signal (phase) could be used for in-situ monitoring of epilayer growth on SI-InP wafers.

In situ monitoring of the growth and characterization of (PrMnO3)n(SrMnO3)n superlattices

2003 ◽  
Vol 94 (4) ◽  
pp. 2716-2724 ◽  
Author(s):  
B. Mercey ◽  
P. A. Salvador ◽  
Ph. Lecoeur ◽  
W. Prellier ◽  
M. Hervieu ◽  
...  
Keyword(s):  
In Situ Monitoring

Polarization Resolved Grazing Angle Scatterometry for In Situ Monitoring of Roughness for Silicon and Compound Solar Cells, Light Emitting Devices and other Structured Surfaces

MRS Advances ◽  
2017 ◽  
Vol 2 (53) ◽  
pp. 3129-3133
Author(s):  
Wojtek J. Walecki ◽  
Peter S. Walecki ◽  
Eve S. Walecki ◽  
Abigail S. Walecki
Keyword(s):  
Solar Cells ◽  
Grazing Angle ◽  
Stray Light ◽  
In Situ Monitoring ◽  
In Situ Characterization ◽  
Light Emitting ◽  
Structured Surfaces ◽  
Light Emitting Devices

ABSTRACTNovel metrology tool for in-situ characterization of surfaces semiconductor solar cells (both silicon and compound), and Light Emitting Device diffusers is presented. The tool measures the total integrated scattering when measuring forward, or back-reflection at very large angles of incidence. The tool is insensitive to vibrations and stray light. We discuss polarization resolved data and characterize our technique using NIST traceable standards. We discuss it’s applications to semiconductor manufacturing.

scholarly journals Application of image flow cytometry and photoacoustics for the characterization of red blood cell storage lesions

2021 ◽  
Author(s):  
Ruben N. Pinto
Keyword(s):  
Flow Cytometry ◽  
Structural Changes ◽  
Blood Gas Analysis ◽  
Gas Analysis ◽  
In Situ Monitoring ◽  
Image Flow ◽  
Morphology Characterization

Significant functional/structural changes of red blood cells (RBCs) have been documented during its in vitro storage. Collectively termed as RBC storage lesions, changes include an increase in RBC oxygen saturation (SO2) and an increase in irreversibly damaged RBCs (spheroechinocytes). In this work, novel optical techniques are presented for determining the spheroechinocyte population as a function of storage time via automated image flow cytometry (IFC) morphology characterization, and the acquisition of RBC SO2 via an in situ photoacoustic (PA) method. Blood gas analysis (BGA) was used as the gold standard SO2 measure. Over the lifespan of seven blood bags, the IFC spheroechinocyte population – PA SO2 correlation was found to be strong (0.600.95) shows high potential for in situ monitoring of RBC storage lesions.

Characterization of Thin Film Dissolution in Water with in Situ Monitoring of Film Thickness Using Reflectometry

2016 ◽  
Vol 8 (27) ◽  
pp. 17622-17630 ◽  
Author(s):  
Alexander S. Yersak ◽  
Ryan J. Lewis ◽  
Jenny Tran ◽  
Yung C. Lee
Keyword(s):  
Thin Film ◽  
Film Thickness ◽  
In Situ Monitoring

Biofilms in Food Processing Environments: Challenges and Opportunities

2019 ◽  
Vol 10 (1) ◽  
pp. 173-195 ◽  
Author(s):  
Avelino Alvarez-Ordóñez ◽  
Laura M. Coughlan ◽  
Romain Briandet ◽  
Paul D. Cotter
Keyword(s):  
Food Processing ◽  
Biofilm Formation ◽  
In Situ Monitoring ◽  
Fermented Foods ◽  
Microbial Biofilms ◽  
Challenges And Opportunities ◽  
Intraspecies Variability ◽  
The Impact

This review examines the impact of microbial communities colonizing food processing environments in the form of biofilms on food safety and food quality. The focus is both on biofilms formed by pathogenic and spoilage microorganisms and on those formed by harmless or beneficial microbes, which are of particular relevance in the processing of fermented foods. Information is presented on intraspecies variability in biofilm formation, interspecies relationships of cooperativism or competition within biofilms, the factors influencing biofilm ecology and architecture, and how these factors may influence removal. The effect on the biofilm formation ability of particular food components and different environmental conditions that commonly prevail during food processing is discussed. Available tools for the in situ monitoring and characterization of wild microbial biofilms in food processing facilities are explored. Finally, research on novel agents or strategies for the control of biofilm formation or removal is summarized.

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