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Impurities in zone-refining anthracene crystals

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Impurities in zone-refining anthracene crystals
นักวิจัย : Hong, Irvine Huamin , Tan, Ke Jie , Toh, Minglin , Jiang, Hui , Zhang, Keke , Kloc, Christian
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Hong, I. H., Tan, K. J., Toh, M., Jiang, H., Zhang, K., & Kloc, C. (2013). Impurities in zone-refining anthracene crystals. Journal of crystal growth, 363, 61-68. , 0022-0248 , http://hdl.handle.net/10220/11693 , http://dx.doi.org/10.1016/j.jcrysgro.2012.10.002
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of crystal growth
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Over the past five decades, paramount interest had been given to the synthesis of single crystals for use as scintillators in nuclear radiation detection field. Organic semiconductors are in principle less costly and of light weight, providing real potential as improved radiation detectors. However, challenges remain in the crystal growth and purification of the neutron detection material whereby the residual impurity will result in formation of excitation trap quenching the light yield within the host crystal. In this study, single crystals of anthracene up to 10 cm had been grown from the melt based on a self-designed, inexpensive and versatile zone refining apparatus. Platelets cut from these crystals by applying wire saw were tested for purity and perfection by Powder X-ray Diffraction (XRD), Laser Desorption Ionization-Time of Flight Mass Spectrometry (LDI-ToF MS), Fourier-Transform Infrared Spectroscopy (FT-IR), Atomic Force Microscopy (AFM) and fluorescence measurement. The results of characterization studies revealed that impurities within commercial anthracene powder such as carbazole and 9,9′bianthryl have been reduced effectively as indicated by LDI-ToF MS analysis. Meanwhile the photoluminescence analysis had clearly demonstrated higher photon energies derived from the pure crystal as compared to those of commercial material with higher content of impurities where free excitons during their localization surrender part of its energy to the surroundings.

บรรณานุกรม :
Hong, Irvine Huamin , Tan, Ke Jie , Toh, Minglin , Jiang, Hui , Zhang, Keke , Kloc, Christian . (2555). Impurities in zone-refining anthracene crystals.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Hong, Irvine Huamin , Tan, Ke Jie , Toh, Minglin , Jiang, Hui , Zhang, Keke , Kloc, Christian . 2555. "Impurities in zone-refining anthracene crystals".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Hong, Irvine Huamin , Tan, Ke Jie , Toh, Minglin , Jiang, Hui , Zhang, Keke , Kloc, Christian . "Impurities in zone-refining anthracene crystals."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Hong, Irvine Huamin , Tan, Ke Jie , Toh, Minglin , Jiang, Hui , Zhang, Keke , Kloc, Christian . Impurities in zone-refining anthracene crystals. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.