Research on the Optical Characteristics of Organic Nanoparticles
With the joint research between two groups of Prof.
Jiannian YAO (Key Laboratory of Optical Chemistry) and Prof. Zhigang SHUAI
(Key Laboratory of Organic Solids), from the Institute of Chemistry, Chinese
Academy of Sciences, great progress has been made in the optical characteristics
and size-tunable emission of organic nanoparticles.
The nanoparticles of 1,3-diphenyl-5-(2-anthryl)-2-pyrazoline
(DAP) show different optical properties #as# compared with single molecule
and bulky material. They were observed to exhibit size-dependent adsorption
transition as well as emission efficiency. For the first time, size-dependent
emission spectra are found for the DAP nanoparticles. Such an observation
may present a new approach for achieving color modulation for electroluminescent
materials. Achievement in this research was published in J. Am. Chem.
Soc. 2003, 125, 6740-6745, a highly esteemed journal in the field.
Largest Diameter Birefringent Filter in the World
Developed by CAS Nanjing Institute of Astronomical
Optics & Technology (NIAOT), National Astronomical Observatory, the
Birefringent Filter for the construction of the Solar Magnetic Active
Research Telescope (SMART) in Hida Observatory, Japan, has received good
result during the expert appraisal in Kyoto University.
Chinese Scientists Found Fossils at the Early Cretaceous Period
Gingko fossils with genito-organs during the Early
Cretaceous Period were found by Chinese scientists in Yi County of Liaoning
Province . This founding has filled in the gaps of the gingko of over
100 million years in the history.
New Process in HT-7U Project
Tests on superconducting electromagnetic performance,
mechanical performance and thermal engineering hydraulic performance of
the toroidal prototype coil of the HT-7U Superconducting Tokamak were
successfully carried out by the Institute of Plasma Physics on June 30
to July 7. After 100 hours' cooling, the coil entered into the superconducting
state satisfactorily. Then the superconducting test under the current
of 14.3 kA and 16 kA were progressed and the quench current under the
temperature of 6.8K was yielded. The results showed that the performances
of the coil achieve the designing target and meet the operational demand
of the facility.
copyright © 1998-2005