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wuyao118金蟲 (小有名氣)
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無(wú)機(jī)材料化學(xué)專業(yè)：請(qǐng)教高手翻譯幾句話，不勝感激！
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1 微米球大小不均勻、形狀不規(guī)則 2 PbS納米晶有足夠的時(shí)間定向生長(zhǎng)為尺寸較大的納米片，但納米片的數(shù)量少。 導(dǎo)致不能很好地形成PbS空心微米球，而形成尺寸較大的PbS納米片 3 當(dāng)反應(yīng)時(shí)間太長(zhǎng)(36 h)時(shí)，生成了許多由微米球破裂生成的團(tuán)聚顆粒，只有少數(shù)形狀不規(guī)則、大小不均一的微米球，且組成微米球的納米片形狀很不規(guī)則，長(zhǎng)徑比降低、有逐漸轉(zhuǎn)變?yōu)榧{米顆粒的傾向。致使空心微米球由于失去了納米片的架橋作用而破裂成顆粒，這是因?yàn)橐环矫妫瑯?gòu)成空心微米球的納米片比表面積大、比表面自由能高，因而在熱力學(xué)上是不穩(wěn)定的，隨著反應(yīng)時(shí)間的延長(zhǎng)，會(huì)轉(zhuǎn)變?yōu)轭w粒并團(tuán)聚，以降低其表面自由能，達(dá)到穩(wěn)定狀態(tài)； [ Last edited by wuyao118 on 2011-7-5 at 16:21 ] |
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sltmac
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【答案】應(yīng)助回帖
wuyao118(金幣+60, 翻譯EPI+1): 好 謝謝！ 2011-07-06 09:03:01
wuyao118(金幣+60): 2011-07-16 14:57:39
wuyao118(金幣+60): 2011-07-16 14:57:39
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1 As-prepared microspheres with fluctuation in size and irregularity in shape. 2 The time for the orientated growth of PbS nanosheets generated from nanocrystalline is enough. However, the PbS hollow sub-microsphere couldn’t be well formed because of the small in quantity but to form large size of PbS nanosheet 3 Many agglomerated particles from the rupture of microspheres are prepared when the reaction time prolonging to 36h and few microspheres with fluctuation in size and irregularity in shape. The nanosheet composed with microspheres also shows the irregularity in shape, lower aspect ratio, and there is a tendency for microspheres transforming into nanoparticles. Therefore, the nanoparticles are obtained due to the vanish of bridging action of nanosheets in microspheres, the reason is the large surface area and high specific surface free energy of nanosheets, so it is non-stable in thermodynamics. With the increase in reaction time, it will generate to nanoparticles and glomerate together to reduce its surface free energy sustain stable situation. |
2樓2011-07-06 08:46:42
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