Abstract
Unconventional sensors with characteristics of portability, safety, remote manipulation, and high spatiotemproal resolution are highly desirable to detect varied temperature under specific conditions such as local temperature fields of the microenvironment. Herein, a 3D high-performance optical thermometry platform driven by the up-conversion green fluorescence of Er3+/Yb3+co-doped electrospun fibrous aerogels is developed. The system simply consists of polycrystalline-encapsulated (Y1-x-yErxYby)2O2S/polyacrylonitrile (YOS-EY/PAN) electrospun fibers and chitosan (CS). The flexible fibers form a hierarchically ordered bionic cellular structure through bio-based cross-linking, which avoids toxic chemical cross-linking. Additionally, the intense green emission is ascribed to 2H11/2/4S3/2→ 4I15/2transitions, as the main indicator to determine the relative sensitivity of 1.22% K-1at 303 K. More importantly, multipoint dispersed lanthanide (Ln) between cell walls confers stronger temperature sensing capability to aerogels. The successful strategy provides insights for the development of luminescence thermometry and opens a window for multidimensional temperature sensing.
| Original language | English |
|---|---|
| Pages (from-to) | 3714-3723 |
| Number of pages | 10 |
| Journal | ACS Applied Electronic Materials |
| Volume | 4 |
| Issue number | 7 |
| DOIs | |
| State | Published - 26 Jul 2022 |
| Externally published | Yes |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 12 Responsible Consumption and Production
Keywords
- (YErY)OS/polyacrylonitrile
- capsule space
- electrospun fibrous aerogels
- fluorescence intensity ratio
- optical temperature sensing
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