Slab optical waveguide spectroscopy for in situ interfacial analysis

2005 ◽  
Author(s):  
Naoki Matsuda ◽  
Yusuke Ayato ◽  
Masami Yoshii ◽  
Jose H. Santos ◽  
Zhi-Mei Qi
Keyword(s):  
Optical Waveguide ◽  
Interfacial Analysis

In Situ Construction of One-Dimensional Component-Interchange Organic Core/Shell Microrods for Multicolor Continuous-Variable Optical Waveguide

2019 ◽  
Vol 11 (5) ◽  
pp. 5298-5305 ◽  
Author(s):  
Ming-Peng Zhuo ◽  
Xi-Yu Fei ◽  
Yi-Chen Tao ◽  
Jian Fan ◽  
Xue-Dong Wang ◽  
...  
Keyword(s):  
Optical Waveguide ◽  
Continuous Variable ◽  
Core Shell ◽  
One Dimensional

scholarly journals Macromolecular shape and interactions in layer-by-layer assemblies within cylindrical nanopores

2012 ◽  
Vol 3 ◽  
pp. 475-484 ◽  
Author(s):  
Thomas D Lazzara ◽  
K H Aaron Lau ◽  
Wolfgang Knoll ◽  
Andreas Janshoff ◽  
Claudia Steinem
Keyword(s):  
Optical Waveguide ◽  
Pore Diameter ◽  
Film Growth ◽  
Layer By Layer ◽  
Cylindrical Pore ◽  
Macromolecular Assembly ◽  
Physical Limit ◽  
Actual Volume ◽  
Species Being

Layer-by-layer (LbL) deposition of polyelectrolytes and proteins within the cylindrical nanopores of anodic aluminum oxide (AAO) membranes was studied by optical waveguide spectroscopy (OWS). AAO has aligned cylindrical, nonintersecting pores with a defined pore diameter d 0 and functions as a planar optical waveguide so as to monitor, in situ, the LbL process by OWS. The LbL deposition of globular proteins, i.e., avidin and biotinylated bovine serum albumin was compared with that of linear polyelectrolytes (linear-PEs), both species being of similar molecular weight. LbL deposition within the cylindrical AAO geometry for different pore diameters (d 0 = 25–80 nm) for the various macromolecular species, showed that the multilayer film growth was inhibited at different maximum numbers of LbL steps (n max). The value of n max was greatest for linear-PEs, while proteins had a lower value. The cylindrical pore geometry imposes a physical limit to LbL growth such that n max is strongly dependent on the overall internal structure of the LbL film. For all macromolecular species, deposition was inhibited in native AAO, having pores of d 0 = 25–30 nm. Both, OWS and scanning electron microscopy showed that LbL growth in larger AAO pores (d 0 > 25–30 nm) became inhibited when approaching a pore diameter of d eff,n_max = 25–35 nm, a similar size to that of native AAO pores, with d 0 = 25–30 nm. For a reasonable estimation of d eff,n_max, the actual volume occupied by a macromolecular assembly must be taken into consideration. The results clearly show that electrostatic LbL allowed for compact macromolecular layers, whereas proteins formed loosely packed multilayers.

In Situ Absorption Spectra and Adsorbed Species of Methylene Blue on Glass/Water Interfaces by Slab Optical Waveguide Spectroscopy

2003 ◽  
Vol 57 (1) ◽  
pp. 100-103 ◽  
Author(s):  
Naoki Matsuda ◽  
Jinjian Zheng ◽  
De-Kui Qing ◽  
Akiko Takatsu ◽  
Kenji Kato
Keyword(s):  
Methylene Blue ◽  
Absorption Spectra ◽  
Optical Waveguide ◽  
Adsorbed Species ◽  
In Situ Absorption

Particle Size Measurement in Optical Waveguide Manufacturing Torches Using Dynamic Light Scattering

1988 ◽  
Vol 117 ◽  
Author(s):  
J. R. Bautista ◽  
Eugene Potkay ◽  
Daria L. Scatton
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Optical Waveguide ◽  
Low Frequency ◽  
Correlation Spectroscopy ◽  
Industrial Systems ◽  
Deposition Processes ◽  
Flame Hydrolysis Deposition

AbstractThe characterization of silica “sooting” torches used in optical waveguide manufacture by external flame-hydrolysis deposition processes such as Outside Vapor Deposition (OVD) and Vapor-phase Axial Deposition (VAD) prflents a formid.ble high temperature environment at > 2000°C in the presence of > 1012 particles/cm3 of silica. This paper describes the first application of Dynamic Light Scattering (DLS) to probe particle sizes in an actual lightguide burner following the “triple-flame” VAD design. DLS, also termed Photon Correlation Spectroscopy (PCS) or Diffusion Broadening Spectroscopy (DBS), was previously identified as a viable diagnostic tool for in-situ particle measurements in silica-sooting flames by W. L. Flower [1] and through an earlier collaboration between AT&T and the Sandia Combustion Research Facility. In applying DLS, however, our experience with the VAD torch reveals that a specialized experimental method will undoubtedly be required to deal with the inevitable presence of low frequency system instabilities in industrial systems.

Modification of Optical Waveguide Material PMMA with Nano-Silicon by Sol-Gel Approach

2007 ◽  
Vol 336-338 ◽  
pp. 549-551
Author(s):  
J. Wang ◽  
M. Tang ◽  
F. Zhang ◽  
Zhao Xian Xiong ◽  
J.H. Zhou
Keyword(s):  
Methyl Methacrylate ◽  
Phase Behavior ◽  
Optical Waveguide ◽  
Thermal Analyses ◽  
Sol Gel ◽  
Optical Loss ◽  
Pure Pmma ◽  
Silica Network ◽  
Nano Silicon

Hybrid inorganic-organic materials based on alkoxysilyl-functionalized and poly (methyl methacrylate) were prepared by the in-situ sol-gel approach in the presence of tethaethoxysilance. Interaction between silica network and polymer was analyzed by FTIR, and its influence on phase behavior of hybrid was also investigated by SEM. Thermal analyses indicated that P(MMA-MSMA)-Si had higher value of Tg ,about 170°C, than that of pure PMMA. Meanwhile, the hybrid samples behave favorable optical transparency with small optical loss of around 2 dB.

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