Second Harmonic Generation Spectroscopy as a Method for In Situ and Online Characterization of Particle Surface Properties

2006 ◽  
Vol 23 (5) ◽  
pp. 351-359 ◽  
Author(s):  
Lars Schneider ◽  
Wolfgang Peukert
Keyword(s):  
Second Harmonic Generation ◽  
Surface Properties ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Particle Surface ◽  
Second Harmonic Generation Spectroscopy

Second harmonic generation study of the reconstruction of an Au(110) electrode in HClO4

1997 ◽  
Vol 75 (4) ◽  
pp. 449-455 ◽  
Author(s):  
C. Dale Keefe ◽  
Erika Revesz ◽  
Michel Dionne ◽  
Mario Morin
Keyword(s):  
Second Harmonic Generation ◽  
Single Crystal ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Large Component ◽  
In Situ Study ◽  
Threefold Symmetry ◽  
Single Crystal Electrode ◽  
Second Harmonic Generation Spectroscopy

Second harmonic generation (SHG) was used to carry out an in situ study of the potential-induced reconstruction of an Au(110) single crystal electrode in an aqueous solution of 0.01 M HClO4. In this study, we found that the symmetries of the surface susceptibility of the reconstructed and the unreconstructed Au(110) surfaces have a large component of threefold symmetry. A detailed analysis shows that both surfaces have an overall Cs symmetry giving one-, two-, and threefold symmetries for the surface susceptibility. However, another, different, source of threefold symmetry, perpendicular to the first, is needed to fit the data. We suggest that this extra source of threefold symmetry is due to the (111) microfacets that are present on the open (110) surface. Keywords: electrochemistry, single crystal, reconstruction, second harmonic generation spectroscopy.

scholarly journals In situ characterization of SiO2 etching with second harmonic generation and ellipsometry

1996 ◽  
Vol 352-354 ◽  
pp. 612-616 ◽  
Author(s):  
A. Priem ◽  
C.W. van Hasselt ◽  
M.A.C. Devillers ◽  
Th. Rasing
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
In Situ Characterization ◽  
Sio2 Etching

In-Situ Characterization of Oxide Films on Liquid Alkali Metals Using Second Harmonic Generation (SHG)

1996 ◽  
Vol 451 ◽  
Author(s):  
H. Tostmann ◽  
D. Nattland ◽  
W. Freyland
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Alkali Metals ◽  
Surface Characterization ◽  
Second Harmonic ◽  
Pure Metal ◽  
Temperature Dependent ◽  
Characterization Methods

ABSTRACTThe experiments described in this paper clearly show that Second Harmonic Generation (SHG) may be used as a sensitive tool for detecting oxide impurities at interfaces not accessible for usual surface characterization methods. As a striking feature, one peak in the temperature dependent SH intensity is observed for liquid potassium and five peaks for liquid cesium. The occurrence of these peaks cannot be understood in terms of the nonlinear optical properties of the pure metal. By varying the oxygen content present in the melt it can be shown that these peaks must be attributed to the presence of oxide impurities segregating at the interface. In addition it is shown that the presence of oxides at the interface inert sapphire - molten alkali metal significantly alters the structure of the sapphire surface finally leading to corrosion visible even by the eye.

scholarly journals An in situ study of reconstructed gold electrode surfaces by second harmonic generation

1989 ◽  
Vol 163 (2-3) ◽  
pp. 123-128 ◽  
Author(s):  
A. Friedrich ◽  
B. Pettinger ◽  
D.M. Kolb ◽  
G. Lüpke ◽  
R. Steinhoff ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Gold Electrode ◽  
Second Harmonic ◽  
Electrode Surfaces ◽  
In Situ Study

scholarly journals In situ second-harmonic generation mediated photodynamic therapy by micelles co-encapsulating coordination nanoparticle and photosensitizer

RSC Advances ◽  
2017 ◽  
Vol 7 (82) ◽  
pp. 52125-52132 ◽  
Author(s):  
Xuyang Zhou ◽  
Yang Chen ◽  
Jian Su ◽  
Xiaohe Tian ◽  
Yonghuang Luo ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Property A

NIR-PDT strategy was introduced by employing a nonlinear optical conveyor bearing strong second-harmonic generation (SHG) property. A biocompatible micellic system co-delivered the conveyor and photosensitizer for in situ NIR-PDT.

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