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baiqiaoqiao銀蟲(chóng) (初入文壇)
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[求助]
急、急、急。求助翻譯成中文
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The Enzymatic Oxidation of GrapheneOxide Gregg P. Kotchey,† Brett L. Allen,† Harindra Vedala,† Naveena Yanamala,‡,§ Alexander A. Kapralov,‡Yulia Y. Tyurina,‡ Judith Klein-Seetharaman,§ Valerian E. Kagan,‡ and Alexander Star†,*†Department of Chemistry, ‡Department of Environmental and Occupational Health, and §Department of Structural Biology, University of Pittsburgh, Pittsburgh,Pennsylvania, 15260 ABSTRACT Two-dimensional graphitic carbon is a new material with many emerging applications, and studying its chemical properties is an important goal. Here, we reported a new phenomenon;the enzymatic oxidation of a single layer of graphitic carbon by horseradish peroxidase (HRP). In the presence of low concentrations of hydrogen peroxide (～40 μM), HRP catalyzed the oxidation of graphene oxide, which resulted in the formation of holes on its basal plane. During the same period of analysis, HRP failed to oxidize chemically reduced graphene oxide (RGO). The enzymatic oxidation was characterized by Raman, ultraviolet-visible, electron paramagneticresonance, Fourier transform infrared s pectroscopy, transmission electron microscopy, atomic force microscopy, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and gas chromatography-mass spectrometry. Computational docking studies indicated that HRP was preferentially bound to the basal plane rather than the edge for both graphene oxide and RGO. Owing to the more dynamic nature of HRP on graphene oxide, the heme active site of HRP was in closer proximity to graphene oxide compared to RGO, thereby facilitating the oxidation of the basal plane of graphene oxide. We also studied the electronic properties of the reduced intermediate product, holey reduced graphene oxide (hRGO), using field-effect transistor (FET) measurements. While RGO exhibited a V-shaped transfer characteristic similar to a single layer of graphene that was attributed to its zero band gap, hRGO demonstrated a p-type semiconducting behavior with a positive shift in the Dirac points. This p-type behavior rendered hRGO, which can be conceptualized as interconnected graphene nanoribbons, as a potentially attractive material for FET sensors. KEYWORDS: graphene . oxidation . microscopy . peroxidase . field-effect transistor |
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燦燦妹
至尊木蟲(chóng) (著名寫手)
- 翻譯EPI: 68
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- 蟲(chóng)號(hào): 1783324
- 注冊(cè): 2012-04-27
- 性別: GG
- 專業(yè): 環(huán)境工程
【答案】應(yīng)助回帖
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baiqiaoqiao(RXMCDM代發(fā)): 金幣+15, 多謝應(yīng)助！ 2015-10-04 20:16:45
baiqiaoqiao(RXMCDM代發(fā)): 金幣+15, 多謝應(yīng)助！ 2015-10-04 20:16:45
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作者名字沒(méi)翻譯，這東西沒(méi)什么翻譯的。重點(diǎn)是標(biāo)題及摘要 The Enzymatic Oxidation of GrapheneOxide 石墨烯氧化物的酶促氧化 Department of Chemistry, ‡Department of Environmental and Occupational Health, and §Department of Structural Biology, University of Pittsburgh, Pittsburgh,Pennsylvania, 15260 匹茲堡大學(xué)，結(jié)構(gòu)生物學(xué)部及環(huán)境和職業(yè)健康部，化學(xué)系 賓夕法尼亞州匹茲堡 15260 ABSTRACT 摘要 Two-dimensional graphitic carbon is a new material with many emerging applications, and studying its chemical properties is an important goal. 二維石墨碳是一種具有很多工業(yè)應(yīng)用的新材料。研究其化學(xué)性質(zhì)目標(biāo)重大。 Here, we reported a new phenomenon;the enzymatic oxidation of a single layer of graphitic carbon by horseradish peroxidase (HRP). 本文報(bào)道了一種新新現(xiàn)象，即經(jīng)辣根過(guò)氧化物酶HRP作用使，單層石墨碳的酶促氧化。 In the presence of low concentrations of hydrogen peroxide (～40 μM), HRP catalyzed the oxidation of graphene oxide, which resulted in the formation of holes on its basal plane. 當(dāng)過(guò)氧化氫濃度低時(shí) (～40 μM)，, HRP催化石墨烯氧化物的氧化，從而導(dǎo)致其底面空洞的形成。 During the same period of analysis, HRP failed to oxidize chemically reduced graphene oxide (RGO). 同一時(shí)期的分析表明， HRP不能氧化化學(xué)還原性石墨烯氧化物 (RGO) The enzymatic oxidation was characterized by Raman, ultraviolet-visible, electron paramagneticresonance, Fourier transform infrared s pectroscopy, transmission electron microscopy, atomic force microscopy, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and gas chromatography-mass spectrometry. 用拉曼，紫外可見(jiàn)吸收，電子順磁共振，傅里葉變換紅外光譜，透射電子顯微鏡法，原子力顯微鏡，聚丙烯酰胺凝膠電泳以及氣相色譜-質(zhì)譜來(lái)表征酶催氧化。 Computational docking studies indicated that HRP was preferentially bound to the basal plane rather than the edge for both graphene oxide and RGO. 計(jì)算對(duì)接研究表明，HRP優(yōu)先綁定到石墨烯氧化物及RGO兩者的底面，而不是邊緣。 Owing to the more dynamic nature of HRP on graphene oxide, the heme active site of HRP was in closer proximity to graphene oxide compared to RGO, thereby facilitating the oxidation of the basal plane of graphene oxide. 由于石墨烯氧化物上有更多地動(dòng)態(tài)特性，與RGO相比， HRP的血紅素活性部位更接近于石墨烯氧化物。 We also studied the electronic properties of the reduced intermediate product, holey reduced graphene oxide (hRGO), using field-effect transistor (FET) measurements. 用過(guò)使用場(chǎng)效應(yīng)晶體管測(cè)量，本文還研究了還原中間產(chǎn)物及多孔R(shí)GO的電子特性。 While RGO exhibited a V-shaped transfer characteristic similar to a single layer of graphene that was attributed to its zero band gap, hRGO demonstrated a p-type semiconducting behavior with a positive shift in the Dirac points. RGO呈現(xiàn)出與單層的石墨烯相似的V形傳熱性能，這是由于其零帶隙，致使hRGO因在狄拉克點(diǎn)的正向位移而表現(xiàn)出p型半導(dǎo)體行為。 This p-type behavior rendered hRGO, which can be conceptualized as interconnected graphene nanoribbons, as a potentially attractive material for FET sensors. 這種p型行為顯示出 hRGO 可以概念化為互相連接石墨烯納米帶，一種制作TET感應(yīng)器的潛在的有吸引力的材料。 |
2樓2015-05-10 17:56:42
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