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cuiguanwei金蟲 (正式寫手)
院士
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[求助]
表征一個(gè)微米級核殼結(jié)構(gòu),如何得到斷面?
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做了一個(gè)短棒狀核殼結(jié)構(gòu)材料,直徑2微米,長8微米,因沒法表征核殼結(jié)構(gòu),我想把棒切斷了,用SEM表征斷面,可是研磨效果不好,這個(gè)材料非常脆,全碎了,看不到斷面,請教各位如何制造一個(gè)平整好看的斷面。恐x謝啦! |
與自己課題相關(guān) | 空心球 | 碳材料及二維材料 |

鐵桿木蟲 (知名作家)
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至少有兩種方案可供選擇: 1. 將所制得的樣品包埋在環(huán)氧樹脂(Epoxy resin)中,固化后用玻璃刀切片,然后在透射電鏡(TEM)下觀察; 2. 將樣品粘在掃描電鏡(SEM)樣品托上,用聚焦離子束/電子束進(jìn)行切割,可以得到很好的斷面,然后再在掃描電鏡下觀察。 |

鐵桿木蟲 (知名作家)
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請?jiān)斠奐OURNAL OF APPLIED PHYSICS VOLUME 95, NUMBER 12 15 JUNE 2004, pp8097-8110. Artificial dielectric properties of microscopic metallized rodlike bacteria cells in composites. 論文敘述了金屬化桿菌在環(huán)氧樹脂中分散以及固化工藝,具體如下面英文所示。主要參考環(huán)氧樹脂組成、牌號以及固化條件。你做包埋時(shí)不需要對樣品分散分散,直接拿牙簽蘸一些你的樣品干粉,混在小離心管內(nèi)的環(huán)氧樹脂底部即可(方便將來切片),然后固化。將固化后的樣品拿到測試分析實(shí)驗(yàn)師那邊讓老師幫你切片,由于切片非常薄,SEM不太方便取樣觀察,建議使用透射電鏡(TEM)。 The metallized bacteria were rinsed with distilled water and dehydrated in an alcohol series, then dispersed in acetone and suspended therein to be used for composite formation. The concentration of metallized bacteria in organic solvent suspension was determined by drying and weighing an aliquot of the mixture. The metallized bacteria were cast in epoxy by adding the bacteria/acetone slurry to the epoxy resin, Epon 812. This mixture was vigorously stirred by hand for several minutes to make them more homogeneous, removing the acetone by rotary evaporation in vacuum for about 2 h. Then the curing agent ~DDSA!, solidifying agent ~Methylnadic anhydride!, and accelerator agent ~2-4-6 Tris Phenol! were added in proportion and mixed for another 10 min. The concentrations of metallized bacteria cells in the composites varied from 5 to 20 vol %. The composites were then poured into tubules and placed in a vacuum oven for degassing for 1 h, after which the samples were placed in a thermotank and allowed to cure at 60 °C for 24–36 h. The samples were removed from the molds after full cure and machined to sizes suitable for dielectric measurement. |

鐵桿木蟲 (知名作家)


金蟲 (正式寫手)
院士

鐵桿木蟲 (著名寫手)
Pay first, then get.
榮譽(yù)版主 (知名作家)
愛思考的小強(qiáng)

金蟲 (正式寫手)
院士

鐵桿木蟲 (正式寫手)

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