期刊
ADVANCED OPTICAL MATERIALS
卷 6, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201701150
关键词
carbon dots/PVA composition; fluorescent carbon dots; large-scale synthesis; shape memory materials
资金
- National Natural Science Foundation of China [21571067, 21401028]
- Guangzhou Science and Technology Project [201605030005, 201707010033]
- Science and Technology Planning Project of Guangdong Province [2014A010105035]
- Teamwork Projects - Guangdong Natural Science Foundation [S2013030012842]
Fluorescent carbon dots (CDs) have drawn lots of attention for their excellent properties and broad applications. However, rarely hydrothermal methods of preparation have been investigated and reach a high synthetic yield of CDs, which limits their scale-up production. In this work, a large-scale one-step process is shown to prepare CDs from yeast extract powder (called y-CDs) for the first time and the yield of CDs can reach up to 65.8%. The optical properties and morphology of the y-CDs are characterized. On account of good water solubility and high yield of y-CDs, the application of the reprepared y-CDs/polyvinyl alcohol (PVA) as fluorescent shape memory material is explored. It turns out that the reprepared y-CDs/PVA not only exhibits bright blue luminescence under 365 nm UV light excitation, but also possesses shape memory behavior, which is superior to pure PVA. The interaction between y-CDs and PVA is explained and a water-responsive shape memory mechanism of the y-CDs/PVA composite films is introduced.
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