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ssenn½ð³æ (СÓÐÃûÆø)
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Çó·Òë-subdomain magnetite particles
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ÎÄÏ×ÉϾ³£¿´µ½£¬subdomainÕâ¸ö´Ê£¬Ó¦¸Ã×öÒ»¸ö¶¯´Ê½²£¬µ«ÊDz»ÖªµÀÔõô·ÒëºÃЩ£¬Çó³æÓѰïæ¡£ ¸½³ö´¦£ºThe basic procedure for chemical synthesis of magnetite nanoparticles, mostly used for magnetic fluid preparation, consists of the following steps: co-precipitation ( ¡«80◦C) of magnetite from aqueous solutions of Fe3+and Fe2+ ions in the presence of concentrated NH4OH solution (25%) ¡úsubdomain magnetite particles ¡ú¡ústeric stabilization (chemisorption of lauric acid (LA), myristic acid (MA) or oleic acid (OA); 80¨C82◦C)¡úphase separation ¡úmagnetic decantation and repeated washing¡úmono-layer covered magnetite nanoparticles + free surfactant¡úextraction of mono- layer covered magnetite nanoparticles (acetone addition; flocculation)¡ústabilized magnetite nanoparticles . [ Last edited by ssenn on 2012-8-29 at 10:06 ] |
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ssenn
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wangzhipengj
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6Â¥2012-08-29 13:01:39









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