In situ spectral ellipsometry for real‐time thickness measurement: Etching multilayer stacks

1993 ◽  
Vol 11 (4) ◽  
pp. 1179-1185 ◽  
Author(s):  
Steven A. Henck ◽  
Walter M. Duncan ◽  
Lee M. Lowenstein ◽  
Stephanie Watts Butler
Keyword(s):  
Real Time ◽  
Thickness Measurement ◽  
Spectral Ellipsometry ◽  
Multilayer Stacks

In-situ spectral ellipsometry for real-time thickness measurement and control

1993 ◽  
Author(s):  
Steven A. Henck ◽  
Walter M. Duncan ◽  
Lee M. Loewenstein ◽  
John Kuehne
Keyword(s):  
Real Time ◽  
Thickness Measurement ◽  
Spectral Ellipsometry ◽  
And Control ◽  
Measurement And Control

In situ real-time temperature and thickness measurement for growth on MBE and RTCVD systems

1995 ◽  
Vol 157 (1-4) ◽  
pp. 327-332 ◽  
Author(s):  
H. Möller ◽  
F.G. Böbel ◽  
B. Hertel ◽  
T. Lindenberg ◽  
G. Ritter
Keyword(s):  
Real Time ◽  
Thickness Measurement

Probing the Dynamic Self-Assembly Behaviour of Photoswitchable Wormlike Micelles in Real Time

2018 ◽  
Author(s):  
Elaine A. Kelly ◽  
Judith E. Houston ◽  
Rachel Evans
Keyword(s):  
Real Time ◽  
Absorption Spectroscopy ◽  
Self Assembly ◽  
Uv Light ◽  
Wormlike Micelles ◽  
Tetraethylene Glycol ◽  
Light Illumination ◽  
First Time ◽  
Dependent Processes

Understanding the dynamic self-assembly behaviour of azobenzene photosurfactants (AzoPS) is crucial to advance their use in controlled release applications such as<i></i>drug delivery and micellar catalysis. Currently, their behaviour in the equilibrium <i>cis-</i>and <i>trans</i>-photostationary states is more widely understood than during the photoisomerisation process itself. Here, we investigate the time-dependent self-assembly of the different photoisomers of a model neutral AzoPS, <a>tetraethylene glycol mono(4′,4-octyloxy,octyl-azobenzene) </a>(C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>) using small-angle neutron scattering (SANS). We show that the incorporation of <i>in-situ</i>UV-Vis absorption spectroscopy with SANS allows the scattering profile, and hence micelle shape, to be correlated with the extent of photoisomerisation in real-time. It was observed that C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>could switch between wormlike micelles (<i>trans</i>native state) and fractal aggregates (under UV light), with changes in the self-assembled structure arising concurrently with changes in the absorption spectrum. Wormlike micelles could be recovered within 60 seconds of blue light illumination. To the best of our knowledge, this is the first time the degree of AzoPS photoisomerisation has been tracked <i>in</i><i>-situ</i>through combined UV-Vis absorption spectroscopy-SANS measurements. This technique could be widely used to gain mechanistic and kinetic insights into light-dependent processes that are reliant on self-assembly.

Flat Flexible Thin Milli-electrode Array for Real-time in situ Water Quality Monitoring in Distribution Systems

2017 ◽  
Vol 2017 (4) ◽  
pp. 5598-5617
Author(s):  
Zhiheng Xu ◽  
Wangchi Zhou ◽  
Qiuchen Dong ◽  
Yan Li ◽  
Dingyi Cai ◽  
...  
Keyword(s):  
Water Quality ◽  
Real Time ◽  
Distribution Systems ◽  
Electrode Array ◽  
Water Quality Monitoring ◽  
Quality Monitoring
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