August, 2003

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Basic Research

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.
Among the three filters developed in NIAOT, the one with the diameter over 50mm is the largest Birefringent Filter so far in the world, which will ensure the best observation of SMART.

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.
CAS Academician Zhiyan ZHOU and Prof. Shaolin ZHENG from Shenyang Institute of Geological Minerals have made this founding, which provides a clear recognition of the evolution of gingko. It is a milestone in such research.
This result was published in Nature magazine of UK.

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.
The HT-7U consists of 16 horizontally arrayed D-shaped coils, which could supply steady ring-shape magnetic field of 3.5T. The designing operational parameters of the coils are 4.2K in temperature and 14.3kA in current.

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