Ligand exchange on the surface of cadmium telluride quantum dots with fluorosurfactant-capped gold nanoparticles: Synthesis, characterization and toxicity evaluation
文献类型：期刊论文
| 作者 | Wang, Lingyun ; Zhang, Hongxia ; Lu, Chao ; Zhao, Lixia |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2014 |
| 卷号 | 413期号:1页码:140-146 |
| 关键词 | Quantum dots Gold nanoparticles Ligand exchange Thioglycollic acid Citrate Cytotoxicity |
| ISSN号 | 0021-9797 |
| 中文摘要 | CdTe quantum dots (QDs) can provide high-intensity and photostable luminescent signals when they are used as labeling materials for sensing trace amounts of bioanalytes. However, a major concern is whether the capping ligands of CdTe QDs cause toxic effects in living systems. In the current study, we address this problem through the complete ligand transformation of CdTe QDs from toxic thiolglycolic acid (TGA) to green citrate, which is attributed to the Cd S bond breaking and the Au-S bond formation. The highly efficient depletion of S atom from the surface of the CdTe QDs occurs after the addition of fluorosurfactant (FSN)-capped gold nanoparticles into TGA-capped CdTe QDs, accompanying with the rapid aggregation of FSN-capped gold nanoparticles via noncrosslinking mechanism in the presence of high salt. After the ligand transformation, negligible differences are observed on both photoluminescence spectra and luminescent quantum yield. In addition, the cytotoxicity of the original and new-born CdTe QDs is detected by measuring cell viability after the nanoparticle treatment. In comparison with the original TGA-capped QDs, the new-born CdTe QDs can induce minimal cytotoxicity against human hepatocellular liver carcinoma (HepG2) cells even at high dosages. Our study indicates that the extremely simple method herein opens up novel pathways for the synthesis of green CdTe QDs, and the as-prepared citrate-capped CdTe QDs might have great potential for biological labeling and imaging applications. (C) 2013 Elsevier Inc. All rights reserved. |
| WOS记录号 | WOS:000327168800020 |
| 公开日期 | 2015-03-24 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9399]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Lingyun,Zhang, Hongxia,Lu, Chao,et al. Ligand exchange on the surface of cadmium telluride quantum dots with fluorosurfactant-capped gold nanoparticles: Synthesis, characterization and toxicity evaluation[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2014,413(1):140-146. |
| APA | Wang, Lingyun,Zhang, Hongxia,Lu, Chao,&Zhao, Lixia.(2014).Ligand exchange on the surface of cadmium telluride quantum dots with fluorosurfactant-capped gold nanoparticles: Synthesis, characterization and toxicity evaluation.JOURNAL OF COLLOID AND INTERFACE SCIENCE,413(1),140-146. |
| MLA | Wang, Lingyun,et al."Ligand exchange on the surface of cadmium telluride quantum dots with fluorosurfactant-capped gold nanoparticles: Synthesis, characterization and toxicity evaluation".JOURNAL OF COLLOID AND INTERFACE SCIENCE 413.1(2014):140-146. |
入库方式： OAI收割
来源：生态环境研究中心
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