Dual-Emission Fluorescent Silica Nanoparticle-Based Probe for Ultrasensitive Detection of Cu(2+)
文献类型：期刊论文
| 作者 | Zong CH ; Ai KL ; Zhang G ; Li HW ; Lu LH |
| 刊名 | analytical chemistry
 |
| 出版日期 | 2011 |
| 卷号 | 83期号:8页码:3126-3132 |
| 关键词 | ATOMIC-ABSORPTION SPECTROMETER TRANSITION-METAL IONS CDS QUANTUM DOTS COMPLEX-FORMATION AQUEOUS-SOLUTION LIVING CELLS COPPER IONS SENSOR ULTRAFILTRATION POLYETHYLENEIMINE |
| ISSN号 | 0003-2700 |
| 通讯作者 | lu lh |
| 中文摘要 | an effective dual-emission fluorescent silica nanoparticle-based probe has been constructed for rapid and ultrasensitive detection of cu(2+). in this nanoprobe, a dye-doped silica cote served as a reference signal, thus providing a built-in correction for environmental effects. a response dye was covalently grafted on the surface of the silica nanoparticles through a chelating reagent for cu(2+). the fluorescence of the response dye could be selectively quenched in the presence of cu(2+) accompanied by a visual orange-to-green color switch of the nanoprobe. the nanoprobe provided an effective platform for reliable detection of cu(2+) with a detection limit as low as 10 nm, which is nearly 2 x 10(3) times lower than the maximum level (similar to 20 mu m) of cu(2+) in drinking water permitted by the u.s. environmental protection agency (epa). the high sensitivity was attributed to the strong chelation of cu(2+) with polyethyleneimine (pei) and a signal amplification effect. the nanoprobe constructed by this method was very stable, enabling the rapid detection of cu(2+) in real water samples. good linear correlations were obtained over the concentration range from 1 x 10(-7) to 8 x 10(-7) (r(2) = 0.99) with recoveries of 103.8-99.14% and 95.5-95.14% for industrial wastewater and lake water, respectively. additionally, the long-wavelength emission of the response dye can avoid the interference of the autofluorescence of the biosystems, which facilitated their applications in monitoring cu(2+) in cells. furthermore, the nanoprobe showed a good reversibility; the fluorescence can be switched "off' and "on" by an addition of cu(2+) and edta, respectively. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| 公开日期 | 2012-06-11 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/44702]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zong CH,Ai KL,Zhang G,et al. Dual-Emission Fluorescent Silica Nanoparticle-Based Probe for Ultrasensitive Detection of Cu(2+)[J]. analytical chemistry,2011,83(8):3126-3132. |
| APA | Zong CH,Ai KL,Zhang G,Li HW,&Lu LH.(2011).Dual-Emission Fluorescent Silica Nanoparticle-Based Probe for Ultrasensitive Detection of Cu(2+).analytical chemistry,83(8),3126-3132. |
| MLA | Zong CH,et al."Dual-Emission Fluorescent Silica Nanoparticle-Based Probe for Ultrasensitive Detection of Cu(2+)".analytical chemistry 83.8(2011):3126-3132. |
入库方式： OAI收割
来源：长春应用化学研究所
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