Journal of Shanghai University(Natural Science Edition) ›› 2014, Vol. 20 ›› Issue (6): 707-714.doi: 10.3969/j.issn.1007-2861.2014.01.024

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Unique Absorption Spectrum and Microstructure Characteristics of Golden Seawater Cultured Pearl

YAN Jun1,2, LIU Pei-jun2, ZHANG Xu2, YU Dan-yan2,HU Xian-chao3, WANG Xiao-xiang1   

  1. 1. Zhejiang Institute of Quality Inspection Science, Hangzhou 310013, China;2. Department of Material Science and Engineering, Zhejiang University, Hangzhou 310027, China;3. Research Center of Analysis and Measurement, Zhejiang University of Technology,Hangzhou 310014, China
  • Received:2013-10-21 Online:2014-12-23 Published:2014-12-23

Abstract: A systematic study on the golden seawater cultured pearl (gold CP) were carried out using ultraviolet-visible (UV-VIS) absorption spectrum, field emission scanning electron microscope (FE-SEM) and Fourier transform infrared (FTIR) spectra. The following results were obtained. Density of imbricate structure on the surface of gold CP is different, maybe a result of the slight varied UV-VIS absorption spectrum. From inside to outside of nacreous layer in the cross-section, aragonite sheet or prism structure has not been found in the region near the nucleus. In contrast, aragonite crystal exists in a form of sheet structure in the middle and the outer part of the nacreous layer. The surface of nacreous layer displays the characteristic of multistage structural units, and a micro-sheet existing in the surface of nacreous layer is composed of many aragonite nano-particles.

Key words: golden seawater cultured pearl (gold CP), microstructure;UV-VIS absorption spectrum, nacreous layer, photonic band gap structure

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