| Colorimetric photonic crystal micro-beads for the detecting of heavy metal ions | |
| Xuemin Du; Hiu-Man Chiu; Tianzhun Wu | |
| 2015 | |
| 会议名称 | The 8th International Conference on Nanophotonics (ICNP) |
| 会议地点 | Chang Chun |
| 英文摘要 | We have developed a facile method for the visual detection of metal ions (such as Cu 2+, Co2+, Ni2+ and Pb 2+) by using photonic colloidal crystalline (PCC) microspheric beads. The PCC micro-beads were fabricated from the orderly three-dimensional packing of core-shell nanoparticles with hydrogel coatings laden with anionic phosphate functionalities. Electrostatic binding of metal cations by the hydrogel coating lowered its internal osmotic pressure and caused shrinkage of the core-shell nanoparticles. This brought about a blue-shift of the photonic Bragg diffraction λmax of the micro-beads. It was demonstrated that our PCC beads could detect broad range of metal ions with high sensitivity. It is anticipated that our technology may also be used in the food safety, drugs and the environment. |
| 收录类别 | 其他 |
| 语种 | 英语 |
| 内容类型 | 会议论文 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/7256]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 作者单位 | 2015 |
| 推荐引用方式 GB/T 7714 | Xuemin Du,Hiu-Man Chiu,Tianzhun Wu. Colorimetric photonic crystal micro-beads for the detecting of heavy metal ions[C]. 见:The 8th International Conference on Nanophotonics (ICNP). Chang Chun. |
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