Self-Assembly of Colloidal Photonic Crystals of PS@PNIPAM Nanoparticles and Temperature-Responsive Tunable Fluorescence
详细信息 查看全文
- 作者：Shuai Yuan ; Fengyan Ge ; Xue Yang ; Shanyi Guang
- 关键词：Colloidal photonic crystals ; Thermoresponsive ; Core ; shell structure ; Fluorescence enhancement ; Photonic band gap
- 刊名：Journal of Fluorescence
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：26
- 期：6
- 页码：2303-2310
- 全文大小：2,864 KB
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Biomedicine
Biomedicine
Biophysics and Biomedical Physics
Biotechnology
Biochemistry
Analytical Chemistry - 出版者：Springer Netherlands
- ISSN：1573-4994
- 卷排序：26
文摘
A strategy for significantly enhancing fluorescence is developed based on the coupling of optical properties of colloidal photonic crystals (CPCs) with responsive microgel. In this paper, thermoresponsive microgel PNIPAM was employed for the fabrication of core-shell structure. The core-shell PS@PNIPAM nanoparticles (NPs) are then assembled to CPCs by a vertical deposition method. Subsequently, the novel functional material (RhB/CPCs) can be prepared by depositing fluorescent dye molecules (RhB) on the top of PS@PNIPAM CPCs. We obtained an increase in the fluorescent intensity up to 15-fold and 22-fold compared with RhB on the glass slid and the uneven film. Due to the unique responsive shrinking properties of PNIPAM shell, the amplifying fluorescence behavior of CPCs can be well tuned by varying the temperature. In contrast to RhB on the glass slid, a 15-fold and 12-fold fluorescence enhancement can be observed when the temperature of RhB/CPCs was 20 °C and 50 °C, respectively. The mechanism on enhancement fluorescence of tunable CPCs can be achieved by measurements of thermoresponsive properties. The results indicate that the responsive fluorescence-amplifying method based on CPCs made with responsive core-shell NPs has a potential application for the development of efficient fluorescence sensors.