Long-Term Stability of Optical Properties of Colloidal CdSe Nanocrystals in Polymer Matrices

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940052
Author(s):  
Yu. M. Azhniuk ◽  
V. V. Lopushansky ◽  
A. V. Gomonnai ◽  
B. V. Lopushanska ◽  
A. E. Raevskaya ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
Polyvinyl Alcohol ◽  
Aqueous Solutions ◽  
Polymer Matrices ◽  
Cdse Nanocrystals ◽  
Term Stability ◽  
Long Term Stability ◽  
Mild Conditions

Properties of CdSe nanocrystals (NCs) fabricated in aqueous solutions at relatively mild conditions in the presence of gelatine and stabilized in polymer (gelatine, gelatine + polyvinylpyrrolidone, polyvinyl alcohol) matrices are characterized by Raman, optical absorption and photoluminescence spectroscopies. The effect of heating of the reaction mixture on the average NC size is discussed.

Long term stability of organic selenium species in aqueous solutions

1998 ◽  
Vol 360 (5) ◽  
pp. 512-519 ◽  
Author(s):  
R. Muñoz Olivas ◽  
Philippe Quevauviller ◽  
O. F. X. Donard
Keyword(s):  
Aqueous Solutions ◽  
Selenium Species ◽  
Term Stability ◽  
Organic Selenium ◽  
Long Term Stability

Improvement of solubility and biocompatibility of MnO based nanoparticles in aqueous solutions

2011 ◽  
Vol 1346 ◽  
Author(s):  
Kerstin Koll ◽  
Thomas D. Schladt ◽  
Stefan Weber ◽  
Florian D. Jochum ◽  
Patrick Theato ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Term Stability ◽  
Long Term Stability ◽  
Sterile Filtration ◽  
Surface Modified ◽  
Multifunctional Polymers

ABSTRACTMnO nanoparticles were surface modified using two different multifunctional polymers. By introducing a PEG group, the long term stability, MRI applicability and sterile filtration could be greatly improved. Furthermore, PEGylated MnO NPs were less toxic compared to non-PEGylated NPs. The results suggest that these nanoparticles are suitable for in vivo applications.

NANOSECOND RESPONSE POLYMER ELECTRO-OPTIC SWITCH WITH HIGH POLING EFFICIENCY AND GOOD LONG-TERM STABILITY

2013 ◽  
Vol 27 (22) ◽  
pp. 1350154 ◽  
Author(s):  
JIAN SUN ◽  
XIBIN WANG ◽  
YUANBIN YUE ◽  
JIE MENG ◽  
XIAOQIANG SUN ◽  
...  
Keyword(s):  
Optical Properties ◽  
Insertion Loss ◽  
Order Parameter ◽  
Response Speed ◽  
Characteristic Parameters ◽  
Term Stability ◽  
Long Term Stability ◽  
Electro Optic ◽  
Poling Temperature

In this paper, a Mach–Zehnder interferometer (MZI) electro-optic (EO) polymer switch with a guest–host material Disperse Red 19(DR19)/SU-8 has been designed and fabricated. The optical properties of the DR19/SU-8 were characterized in detail. By optimizing the poling temperature, the DR19/SU-8 material exhibits a high poling efficiency and a good long-term stability. The order parameter Φ is calculated as 0.65 and electro-optic coefficient γ33 is measured to be 11 pm/V. After about 1440 h, the γ33 remains stable at 7.4 pm/V. The characteristic parameters of the waveguide were carefully designed and fabrication process was strictly controlled. At 1550 nm, the insertion loss of the device is 11.2 dB. The rise time and fall time of the switch are 26.6 ns and 22.5 ns, respectively. Owing to the nanosecond response speed and good long-term stability, this switch exhibits potential for planar active lightwave circuit applications.

Long term stability of lysine vasopressin and of specifically tritiated lysine vasopressin in weakly acidic aqueous solutions

1980 ◽  
Vol 36 (10) ◽  
pp. 1145-1146 ◽  
Author(s):  
V. Pliška ◽  
M. Meyer-Grass ◽  
N. Bersinger ◽  
L. Carlsson ◽  
P. Melin ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Term Stability ◽  
Long Term Stability ◽  
Lysine Vasopressin
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