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28Â¥2019-07-19 17:32:54
zhangjun1988
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2Â¥2015-03-28 09:03:49
·çÃÒ815
½ð³æ (ÕýʽдÊÖ)
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3Â¥2015-03-28 09:41:40
nanofollower
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????????????Langmuir 2011, 27, 7185?C7191????????????????????????? ??÷•?????????The preparation of different sized silica spheres involves the ammonia-catalyzed hydrolysis and condensation of TEOS in an aqueous ethanol solution via the classical st?ober method.21,22 Taking the synthesis of ∼190 nm silica spheres as an example, 15 mL of absolute ethanol, 5 mL of DI water, and 0.7 mL of 28% NH3 3H2O were mixed and stirred. A total of 0.6 mL of TEOS was added into the mixture quickly. After a reaction time of about 10 h, the silica spheres were isolated by centrifugation. Then the white precipitate was washed with ethanol three times. |
4Â¥2015-03-28 09:56:35













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