Ratiometric temperature sensing with semiconducting polymer dots.
Ratiometric temperature sensing with semiconducting polymer dots.
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DOI:
10.1021/ja202945g
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发表时间:
2011-06-01
影响因子:
15
通讯作者:
Chiu, Daniel T.
中科院分区:
文献类型:
--
作者:
Ye, Fangmao;Wu, Changfeng;Jin, Yuhui;Chan, Yang-Hsiang;Zhang, Xuanjun;Chiu, Daniel T.
This communication describes ultra-bright single-nanoparticle ratiometric temperature sensors based on semiconducting polymer dots (Pdots). We attached the temperature sensitive dye—Rhodamine B (RhB), whose emission intensity decreases with increasing temperature—within the matrix of Pdots. The as-prepared Pdot-RhB nanoparticle showed excellent temperature sensitivity and high brightness because it took advantage of the light harvesting and amplified energy transfer capability of Pdots. More importantly, the Pdot-RhB nanoparticle showed ratiometric temperature sensing under a single wavelength excitation and has a linear temperature sensing range that matches well with the physiologically relevant temperatures. We employed Pdot-RhB for measuring intracellular temperatures in a live-cell imaging mode. The exceptional brightness of Pdot-RhB allows this nanoscale temperature sensor to be used also as a fluorescent probe for cellular imaging.
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