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Highly Fluorescent Poly(dimethylsiloxane) for On‐Chip Temperature Measurements
Author(s) -
Zhou Jianhua,
Yan Hui,
Zheng Yizhe,
Wu Hongkai
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200801064
Subject(s) - materials science , fluorescence , composite number , microfluidics , quantum dot , phase (matter) , nanotechnology , microfluidic chip , chip , optoelectronics , composite material , optics , chemistry , physics , electrical engineering , organic chemistry , engineering
This work describes a convenient method to generate a poly(dimethylsiloxane) (PDMS) composite containing ZnO quantum dots (QDs) for whole‐chip temperature measurements. This composite is highly fluorescent and very sensitive to temperature changes (0.4 nm °C −1 , compared to 0.1 nm °C −1 in commonly used CdSe QDs). It also shows extremely high fluorescent stability under various conditions over long time without phase separation or fluorescent changes. Both merits make this composite an ideal material for sensing temperature changes on microfluidic chips. The bonding between the QDs and PDMS is studied by comparing PDMS composites with ZnO QDs of different sizes, and a model is given to elucidate the high stability of this composite.