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greatsupercat木蟲 (正式寫手)
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[求助]
求摘要翻譯論色，中文是我自己寫的，英文也是我自己寫的，請大家?guī)兔π薷挠⑽牟糠帧?
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在這項工作中，我們描述了在室溫下的納米銀三角片和密度相當或類似形狀的納米球的傳感器行為，通過使用紫外可見光譜。傳感機理進行了分析通過使用透射電子顯微鏡和電化學(xué)。這兩種納米材料的研究表明，他們可以作為汞的快速高效傳感器，無需增加任何掩蔽劑。在428納米傳感器淬滅的反應(yīng)在+10 ppb和3ppm成線性關(guān)系，理論檢測限為3 PPB。跟據(jù)納米銀三角片的校準曲線可知，在490 nm處的吸收除以758 nm的吸收線性范圍為10 ppb到1 ppm，理論檢查限為20 ppb。銀三角片的藍移明顯大于球狀納米銀，并對汞有更好的選擇性。然后我們對納米銀三角片和納米球的傳感器行為分別分析，研究表明在更高的波長的納米銀或三角片均有更好的傳感器能力。通過電化學(xué)分析來確定銀納米材料在與汞反應(yīng)的前后變化，研究表明，三角片的氧化峰小于球的氧化峰，因此納米銀三角片更容易被氧化。而與汞反應(yīng)后的納米銀和三角片的氧化峰均正向移動。最后，我們通過實驗證明納米銀三角片有更大的潛力作為污水分析的傳感器。 In this work, we describe the sensing behavior of silver nanoprisms and nanosphere of comparable size or comparable shape, at room temperature by using UV-visible spectroscopy. The sensing mechanisms were analyzed by transmission electron microscopy and electrochemistry. These two nanomaterials showed to be fast and efficient sensors for Hg2+ without adding any masking agent. The sensor extinction response at 428 nm was in linear relationship for Hg2+ between 10 ppb to 3 ppm by silver nanospheres with a theoretical detection limit of 3 ppb. The calibration curve of the silver nanoprisms showed the extinction ratio value at 758 nm divided by 490 nm decreased linearly over the Hg2+ concentration range of 20 ppb to 1 ppm with a theoretical detection limit of 10 ppb. The silver nanoprisms showed greater blue shift than nanospheres and the better selectivity for Hg2+. Then silver nanoprisms and nanospheres of comparable absorbance had been investigated to learn the shape dependant behavior respectively, which showed better sensing capacity at higher wavelength for both of them. The electrochemistry of silver nanospheres and nanoprisms had been investigated to ascertain the silver nanomaterial surface change before and after sensing. It showed the original silver nanoprisms showed greater oxidation activity than nanospheres, by which we assumed the greater activity might be responsible for the better sensing selectivity. After sensing, the oxidation peak for both silver nanospheres and nanoprisms changed to more positive potential because of the formation of amalgam. It was possible to use this approach in applications for the analysis of Hg2+ in contaminated waters especially by nanoprisms. |
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一志愿天津大學(xué)化學(xué)工藝專業(yè)（081702）315分求調(diào)劑
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phu_grassman
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2樓2011-08-19 14:09:52
phu_grassman
榮譽版主 (知名作家)
快樂島、布吉島島主
- 翻譯EPI: 265
- 應(yīng)助: 7 (幼兒園)
- 貴賓: 1.392
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【答案】應(yīng)助回帖
greatsupercat(金幣+10, 翻譯EPI+1): 修改的非常好，讓過覺得領(lǐng)金幣使用更有意義了，非常感謝。 2011-08-19 16:01:41
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In our work, we describled the sensing behavior of silver nanoprisms and nanospheres of comparable size or shape at room temperature by using UV-vis spectroscopy. The sensing mechenisms were analyzed by transmission electron micropscopy and electrochemistry. The study on the two kinds of nanomaterial indicated that they can be used as fast and efficient sensors for Hg2+ without adding any masking agents. There was a linear relationship with Hg2+ within the range of 10 ppb to 3 ppm for the quenching reaction at 428nm, with a theoretical detection limit of 3 ppb. The calibration curve of the silver nanoprisms showed a linear relationship held for the value of the absorption at 490nm devided by that at 758nm between 10ppb and 1ppm, with a theoretical detection limit of 20 ppb. The silver nanoprisms showed greater blue shift than the silver nanospheres and better selectivity for Hg2+. Then we investigated the bahavior of the silver nanoprism sensor and the nanosphere sensor respectively and found that they showed better sensing capacity at higher wavelengths. The electrochemical analysis of silver nanospheres and nanoprisms was carried to ascertain the change of the silver materials before and after reacting with Hg. It showed the original silver nanospheres showed greater oxidation ability than the nanoprisms, of which we assumed the greater ability might be responsible for the better selectivity. After sensing, the oxidation peak for both the silver nanospheres and the nanoprisms moved to a more positive potential because of the formation of amalgam. Finally, the silver nanoprisms proved to be the more promising sensor for the analysis of Hg2+ in contaminated waters. 好吃力！ |
3樓2011-08-19 15:22:53
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