Near-infrared-emitting colloidal Ag2S quantum dots exhibiting upconversion luminescence
文献类型：期刊论文
| 作者 | Zhang, Yanyan1; Jiang, Danyu2; Yang, Wei1; Wang, Dandan1; Zheng, Huiping1; Du, Yuansheng1; Li, Xi1; Li, Qiang1 |
| 刊名 | SUPERLATTICES AND MICROSTRUCTURES
 |
| 出版日期 | 2017-02-01 |
| 卷号 | 102页码:512-516 |
| 关键词 | Quantum dots Upconversion Near-infraed emission Surface Two photon absorption |
| 英文摘要 | Ag2S quantum dots (QDs) coated with thioglycolic acid (Ag2S QDs-TGA) have been synthesized in an organic solvent via a stepwise addition of reagents. When excited by a 980 nm laser, the near-infrared-emitting colloidal Ag2S QDs-TGA exhibit upconversion luminescence (UCL). The observed photoluminescence (PL) was attributed to the presence of ligand-modified Ag2S on the QD surfaces. Hence, upon dilution of the solution, the PL intensity initially increased before subsequently decreasing, accompanied by a blue shift in the PL spectra. The PL phenomena can be attributed to the increase in the amount of ligand-modified Ag2S on the QD surfaces upon dilution, which in turn affected the fluorescence resonance energy transfer (FRET) and re-emission of the surface energy level. The relations between the emission intensity of Ag2S QDs-TGA and the excitation power are investigated, and the results confirm that the UCL in Ag2S QDs-TGA can be ascribed to a two-photon-assisted absorption process via a real energy state. (C) 2016 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Condensed Matter |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | ANTI-STOKES PHOTOLUMINESCENCE ; IN-VIVO ; FLUORESCENCE ; CDS ; NANOCRYSTALS ; ABSORPTION ; EXCITATION ; WATER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000394629000055 |
| 源URL | [http://ir.sic.ac.cn/handle/331005/23714]  |
| 专题 | 上海硅酸盐研究所_无机材料分析测试中心_期刊论文 |
| 作者单位 | 1.East China Normal Univ, Sch Chem & Mol Engn, Shanghai 200062, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yanyan,Jiang, Danyu,Yang, Wei,et al. Near-infrared-emitting colloidal Ag2S quantum dots exhibiting upconversion luminescence[J]. SUPERLATTICES AND MICROSTRUCTURES,2017,102:512-516. |
| APA | Zhang, Yanyan.,Jiang, Danyu.,Yang, Wei.,Wang, Dandan.,Zheng, Huiping.,...&Li, Qiang.(2017).Near-infrared-emitting colloidal Ag2S quantum dots exhibiting upconversion luminescence.SUPERLATTICES AND MICROSTRUCTURES,102,512-516. |
| MLA | Zhang, Yanyan,et al."Near-infrared-emitting colloidal Ag2S quantum dots exhibiting upconversion luminescence".SUPERLATTICES AND MICROSTRUCTURES 102(2017):512-516. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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