Enhanced Photothermal Bactericidal Activity of the Reduced Graphene Oxide Modified by Cationic Water-Soluble Conjugated Polymer
文献类型：期刊论文
| 作者 | Xiao, Linhong1,3; Sun, Jinhua1; Liu, Libing2; Hu, Rong2; Lu, Huan2; Cheng, Chungui1; Huang, Yong1; Wang, Shu2; Geng, Jianxin1 |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2017-02-15 |
| 卷号 | 9期号:6页码:5382-5391 |
| 关键词 | Graphene Water-soluble Conjugated Polymers Covalent Functionalization Electrostatic Attraction Photothermal Killing Of Bacteria |
| 英文摘要 | Surface modification of graphene is extremely important for applications. Here, we report a grafting-through method for grafting water-soluble polythiophenes onto reduced graphene oxide (RGO) sheets. As a result of tailoring of the side chains of the polythiophenes, the modified RGO sheets, that is, RGO-g-P3TOPA and RGO-g-P3TOPS, are positively and negatively charged, respectively. The grafted water-soluble polythiophenes provide the modified RGO sheets with good dispersibility in water and high photothermal conversion efficiencies (ca. 88%). Notably, the positively charged RGO-g-P3TOPA exhibits unprecedentedly excellent photothermal bactericidal activity, because the electrostatic attractions between RGO-g-P3TOPA and Escherichia coli (E. coli) bind them together, facilitating direct heat conduction through their interfaces: the minimum concentration of RGO-g-P3TOPA that kills 100% of E. coli is 2.5 mu g mL(-1), which is only 1/16th of that required for RGO-g-P3TOPS to exhibit a similar bactericidal activity. The direct heat conduction mechanism is supported by zeta-potential measurements and photothermal heating tests, in which the achieved temperature of the RGO-g-P3TOPA suspension (2.5 mu g mL(-1), 32 degrees C) that kills 100% of E. coli is found to be much lower than the thermoablation threshold of bacteria. Therefore, this research demonstrates a novel and superior method that combines photothermal heating effect and electrostatic attractions to efficiently kill bacteria. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/38244]  |
| 专题 | 化学研究所_有机固体实验室 |
| 作者单位 | 1.Chinese Acad Sci, Tech Inst Phys & Chem, 29 Zhongguancun East Rd, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Organ Solids, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiao, Linhong,Sun, Jinhua,Liu, Libing,et al. Enhanced Photothermal Bactericidal Activity of the Reduced Graphene Oxide Modified by Cationic Water-Soluble Conjugated Polymer[J]. ACS APPLIED MATERIALS & INTERFACES,2017,9(6):5382-5391. |
| APA | Xiao, Linhong.,Sun, Jinhua.,Liu, Libing.,Hu, Rong.,Lu, Huan.,...&Geng, Jianxin.(2017).Enhanced Photothermal Bactericidal Activity of the Reduced Graphene Oxide Modified by Cationic Water-Soluble Conjugated Polymer.ACS APPLIED MATERIALS & INTERFACES,9(6),5382-5391. |
| MLA | Xiao, Linhong,et al."Enhanced Photothermal Bactericidal Activity of the Reduced Graphene Oxide Modified by Cationic Water-Soluble Conjugated Polymer".ACS APPLIED MATERIALS & INTERFACES 9.6(2017):5382-5391. |
入库方式： OAI收割
来源：化学研究所
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