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本帖產(chǎn)生 1 個翻譯EPI ，點(diǎn)擊這里進(jìn)行查看

1223270778

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[求助] 求大神翻譯摘要

Membranes act as selective barriers and play an important role in processes such as cellular compartmentalization and industrial-scale chemical and gas purification. The ideal membrane should be as thin as possible to maximize flux, mechanically robust to prevent fracture, and have well-defined pore sizes to increase selectivity. Graphene is an excellent starting point for developing size-selective membranes1, 2, 3, 4, 5, 6, 7, 8 because of its atomic thickness9, high mechanical strength10, relative inertness and impermeability to all standard gases11, 12, 13, 14. However, pores that can exclude larger molecules but allow smaller molecules to pass through would have to be introduced into the material. Here, we show that ultraviolet-induced oxidative etching15, 16 can create pores in micrometre-sized graphene membranes, and the resulting membranes can be used as molecular sieves. A pressurized blister test and mechanical resonance are used to measure the transport of a range of gases (H2, CO2, Ar, N2, CH4 and SF6) through the pores. The experimentally measured leak rate, separation factors and Raman spectrum agree well with models based on effusion through a small number of ?ngstrom-sized pores

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1223270778: 金幣+20, 翻譯EPI+1, ★★★很有幫助 2016-01-12 20:24:04

膜作為具有選擇性柵欄物質(zhì)在如細(xì)胞劃分、工業(yè)化學(xué)和氣體凈化發(fā)揮重要作用。理想的膜應(yīng)該盡可能薄且膜通量盡可能最大,預(yù)防斷裂的機(jī)械性強(qiáng),有很好的增加選擇性得孔隙。石墨烯由于具有原子層和機(jī)械強(qiáng)度、相對惰性、對所有標(biāo)準(zhǔn)氣體的不滲透性，是很好發(fā)展選擇性過濾膜。然而可以排除毛孔較大的分子但允許小分子通過將應(yīng)用到材料中。在這里,我們指出,紫外腐蝕氧化可以創(chuàng)建毛孔微米大小的石墨烯膜,并且此膜可以作為分子篩。密封泡測試和機(jī)械共振是用來測量一系列通過毛孔的氣體運(yùn)輸(H2,二氧化碳,Ar,N2,CH4和SF6)。實驗測量了泄漏率,分離因子和拉曼光譜與模型通過埃米級孔積液量一致。

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2樓2016-01-12 16:43:45