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¿´µ½Ò»ÆªÎÄÏ×˵ÊÇÓÃÒÒ´¼»¹ÔÂȽðËᣬÔÚËÄÑõ»¯ÈýÌúÄÉÃ×Á£×Ó´æÔÚµÄÇé¿öÏ¿ÉÒÔÖÆ±¸µÃµ½ºË¿ÇÐ͵ÄÄÉÃײÄÁÏ£¬¶ÔÓÚÒÒ´¼Äܹ»»¹ÔÎÒÁ˽âµÄ±È½ÏÉÙ£¬Ò²Ã»²éµ½×ÊÁÏ£¬ÇëÎʸ÷룬ÒÒ´¼ÊÇÄܹ»»¹ÔÂȽðËáÂ𣿠ÎÄÏ×Ô»°£º The coating experiment was done by reduction of HAuCl4 in an ethanol solution [2]. Approximately 4 mg magnetite nanoparticles suspended in ethanol (1 ml) with 2 ml of HAuCl4 aqueous solution. Schematic reaction is shown in Fig. 1a. The sample was stirred in a sonication bath from time to time for 2 h at room temperature. The resulting mixture turned dark red during sonication. After that time solution was allowed to stand unmixed form about 15 min, then the prepared magnetite¨Cgold nanocomposites were separated from the colloid by a permanent magnet. Resulting nanoparticles were washed three times with distilled water for use in further experiments. B. Kalska-Szostko et al. / Applied Surface Science 258 (2012) 2783¨C 2787 ËûÌáµ½µÄ²Î¿¼ÎÄÏ׺ÃÏñÒ²²¢²»ÊÇÍêȫһÑùµÄ×ö·¨¡£ÕâÊDzο¼ÎÄÏ×2µÄÐÅÏ¢£º Hindawi Publishing Corporation Journal of Nanomaterials Volume 2009, Article ID 962021, 5 pages doi:10.1155/2009/962021 |
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