tailieunhanh - Advances in Biomimetics Part 2

Tham khảo tài liệu 'advances in biomimetics part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Biomineralization and Biomimetic Synthesis of Biomineral and Nanomaterials 27 Fig. 8. TEM micrographs of the sample prepared using NaHCOs as the CQ2 source for different time a-c 30 min a Atypical TEM micrograph b an individual nanorod and the corresponding SAED pattern of the indivi dual nanorod before and after exposure to electron beam irradiation respectively c the rod assembled from nanoparticles and the corresponding SAED pattern d-h 30 s. Reproduced with permission from Mater. Lett. 2008 62 3110. Copyright 2008Elsevier. Fig. 9. SEM micrographs of the sample prepared using NH COs as the CQ2 source a A typical SEM micrograph b an individual fl ower-like structure c using 20 mL g L P123 d e using 20 mL SDBS g L i using 20 mL CTAB g L . Reproduced with permission from Mater. Lett. 2008 62 3110. Copyright 2008 Elsevier. SrCCbis a simple mineral that has only one polymorph the study of crystallization process of SrCOs may be useful to help understand the formation of the isostructural CaCOs phase aragonite and the mineralization pr ocess of other biominerals. SrCQ is an important reactant in the production of glass for color television tubes and ferrite magnets for small 28 Advances in Biomimetics DC motors Bastow 2002 and also used in theproduction of iridescent and special glasses pigments driers paints pyrotechnics catalysts and chemical sensors Zelle- 1981 Griffiths 1985 Erdemcglu Canbazoglu 1998 Owusu Litz 2000 Shi et al. 2002 . The microwave-assisted method was also used for the synthesis of SrCQ with an olive-like or flower-like morphology Ma Zhu 2007 using Sr NO 3 2 and NH 4 2003in ethylene glycol or water. The olive-like morphology was obtained in ethylene glycol . From Fig. 10c one can see that the olive-like SrCQ structures were formed by the assembly of SrCCfe nanoparticles. The sizes of olive-like SrCQ were relatively uniform. The width of the olive-like structures was about 160 nm and the length was about 500 nm. However the .