We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Piezochromic Carbon Dots with Two-photon Fluorescence.
- Authors
Lu, Siyu; Xiao, Guanjun; Sui, Laizhi; Feng, Tanglue; Yong, Xue; Zhu, Shoujun; Li, Baojun; Liu, Zhongyi; Zou, Bo; Jin, Mingxing; Tse, John S.; Yan, Hu; Yang, Bai
- Abstract
Piezochromic materials, which show color changes resulting from mechanical grinding or external pressure, can be used as mechanosensors, indicators of mechano-history, security papers, optoelectronic devices, and data storage systems. A class of piezochromic materials with unprecedented two-photon absorptive and yellow emissive carbon dots (CDs) was developed for the first time. Applied pressure from 0-22.84 GPa caused a noticeable color change in the luminescence of yellow emissive CDs, shifting from yellow (557 nm) to blue-green (491 nm). Moreover, first-principles calculations support transformation of the sp2 domains into sp3-hybridized domains under high pressure. The structured CDs generated were captured by quenching the high-pressure phase to ambient conditions, thus greatly increasing the choice of materials available for a variety of applications.
- Subjects
QUANTUM dots; OPTOELECTRONIC devices; FLUORESCENCE; COLOR change sensors; QUENCHING (Chemistry)
- Publication
Angewandte Chemie, 2017, Vol 129, Issue 22, p6283
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201700757