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Laser-excited optical emission response of CdTe quantum dot/polymer nanocomposite under shock compression
Xiao P(肖攀)
Source PublicationApplied Physics Letters
2016
Volume108Issue:1Pages:011908
ISSN0003-6951
Abstract

Laser-driven shock compression experiments and corresponding finite element method simulations are carried out to investigate the blueshift in the optical emission spectra under continuous laser excitation of a dilute composite consisting of 0.15% CdTe quantum dots by weight embedded in polyvinyl alcohol polymer. This material is a potential candidate for use as internal stress sensors. The analyses focus on the time histories of the wavelength blue-shift for shock loading with pressures up to 7.3 GPa. The combined measurements and calculations allow a relation between the wavelength blueshift and pressure for the loading conditions to be extracted. It is found that the blueshift first increases with pressure to a maximum and subsequently decreases with pressure. This trend is different from the monotonic increase of blueshift with pressure observed under conditions of quasistatic hydrostatic compression. Additionally, the blueshift in the shock experiments is much smaller than that in hydrostatic experiments at the same pressure levels. The differences in responses are attributed to the different stress states achieved in the shock and hydrostatic experiments and the time dependence of the mechanical response of the polymer in the composite. The findings offer a potential guide for the design and development of materials for internal stress sensors for shock conditions. (C) 2016 AIP Publishing LLC.

DOI10.1063/1.4939701
Indexed BySCI ; EI
Language英语
WOS IDWOS:000374313000028
DepartmentLNM材料的分子/细观统计力学行为
Classification一类
RankingTrue
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60703
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Xiao P. Laser-excited optical emission response of CdTe quantum dot/polymer nanocomposite under shock compression[J]. Applied Physics Letters,2016,108(1):011908.
APA Xiao P.(2016).Laser-excited optical emission response of CdTe quantum dot/polymer nanocomposite under shock compression.Applied Physics Letters,108(1),011908.
MLA Xiao P."Laser-excited optical emission response of CdTe quantum dot/polymer nanocomposite under shock compression".Applied Physics Letters 108.1(2016):011908.
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