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王靈杰金蟲 (初入文壇)
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[求助]
200金幣文獻(xiàn)翻譯(材料類專業(yè) 碳納米管)
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| The mean diameter of our starting MWCNTs was ,8nm (Fig. 2a and Supplementary Fig. 1a). For 10 s of Ar plasma etching, our method converted ,20% of the MWCNTs into single- or few-layer GNRs of 10–20-nm width (height,,2nm; see Fig. 2). Other products were multilayerGNRs orGNRs with CNT cores (Fig. 1d). The yield of GNRs was limited by the relatively wide diameter distribution of the starting MWCNTs used (Supplementary Information). All of the width data were obtained after correcting the tip-size effect1. Within the resolution of atomic force microscopy (AFM), the edges of the obtained GNRs were very smooth. Unlike for previous GNRs, the ribbons were uniform in width along their lengths, none being wedge shaped1, owing to the quasi-one-dimensional CNT templates with uniform diameter along their lengths. According to histogram data on GNRs (Supplementary Fig. 1b, c), the widths of our GNRs mostly fell into the range 10–20nm, which is narrower than that of GNRs made by the sonochemical method1. The width of 10–20nm corresponds to half of the circumference of the startingMWCNTs with the mean diameter of,8nm.The heights of ourGNRs were,0.8, 1.3 and 1.8nm, which we assign to single-, bi- and trilayer GNRs, respectively 22. The folding observed in single-layer GNRs (Fig. 2e, f, i) suggests that the flexibility of the GNRs is excellent in comparison with that of MWCNTs. The folds resulted from bending of the PMMA film23 and/or the perturbation of liquid during the removal of the PMMA in acetone. |
金蟲 (初入文壇)
| 我們合成的多壁碳納米管的平均直徑為8nm(參見圖2a以及圖1a的補(bǔ)充)。對于10s的氬等離子體蝕刻技術(shù),我們的方法可以將20%的多壁碳納米管轉(zhuǎn)化成寬度為10-20nm(高為2nm,參見圖2)的單層或幾層金納米棒。其他產(chǎn)物為以碳納米管為核的多層金納米棒或金納米棒(參見圖1d)。金納米棒的生長受到這種粒徑分布相對較寬的多壁碳納米管的限制(參加補(bǔ)充信息)。在修正了尖端尺寸的影響后,可以得到所有的寬度數(shù)據(jù)。在原子力顯微鏡(AFM)的分辨率范圍內(nèi),可以看到金納米棒的邊緣非常光滑。與以往的金納米棒不同,這些帶狀物沿著長度方向的寬度是均一的,沒有楔形的,因?yàn)闇?zhǔn)一維的碳納米管模板沿著長度方向的直徑是均一的。根據(jù)金納米棒的柱狀分布數(shù)據(jù)(參見圖1b,c),我們的金納米棒寬度主要分布在10-20nm,比聲化方法得到的要窄。10-20nm的寬度與平均粒徑為8nm的多壁碳納米管的半周長接近。單層、雙層以及三層金納米棒的高度分別為0.8、1.3和1.8nm。單層金納米棒的褶皺(圖2e,f,i)說明金納米棒的柔韌性比多壁碳納米管好。褶皺的產(chǎn)生是由于聚甲基丙烯酸甲酯薄膜的彎曲或者丙酮在去除聚甲基丙烯酸甲酯的過程中隊(duì)溶液的擾動(dòng)。 |

金蟲 (正式寫手)

金蟲 (正式寫手)
| 我們采用的多壁碳納米管(MWCNTs)的平均直徑為8nm(見圖2a和附件 圖1a)。在我們使用的方法中,經(jīng)過10秒鐘氬氣等離子刻蝕,20%的MWCNTs轉(zhuǎn)變?yōu)?0~20nm寬的單層或少數(shù)層石墨烯納米帶(GNRs)(厚度2nm,見圖2)。其他產(chǎn)物為多層GNRs或者纏繞在CNTs上的GNRs(圖1的)。生成的GNRs的尺寸受到所采用的MWCNRs的相對寬的直徑分布的限制(見附件)。所有的寬度數(shù)據(jù)都是經(jīng)過針尖大小效應(yīng)的矯正后獲得的。在原子力顯微鏡(AFM)的分辨率內(nèi),所得GNRs的邊緣是非常平滑的。與之前的GNRs不同,這些納米帶沿著他們的長度方向的寬度是一致的,不存在楔形,這是由于準(zhǔn)一維的碳納米管模板具有在長度方向上統(tǒng)一的直徑。根據(jù)GNRs的柱狀圖數(shù)據(jù)(附件 圖1b,c)來看,我們獲得的GNRs的寬度大部分落在10~20nm之間,這比采用生化學(xué)法得到的GNRs的分布窄。10~20nm的寬度對應(yīng)平均直徑8nm的原始MWCNTs周長的一半。所得CNRs的厚度分別為0.8,1.3,1.8nm,分別對應(yīng)單層,雙層和三層GNRs。在單層GNRs中看到的褶皺表明GNRs具有比MWCNTs更優(yōu)異的的柔韌性。褶皺的結(jié)果是從聚甲基丙烯酸甲酯(PMMA)膜的彎曲和在丙酮中去除PMMA時(shí)液體的擾動(dòng)中獲得的。 |

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