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CdTe quantum dots and polymer nanocomposites for x-ray scintillation and imaging
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Normalized PL spectra for a series of MPA-capped CdTe QDs shows peak emissions between 520 and 680 nm; the inset shows the luminescence image of various CdTe QDs under 365 nm UV light excitement. (b) Measured and fitted exponential decay from CdTe QDs emitting at 530 nm, 580 nm, and 650 nm with decay time of 19 ns, 21 ns, and 87 ns, respectively.

Image of FIG. 2.
FIG. 2.

(a) Absorption and PL spectra of a 2 wt % CdTe/PVA nanocomposite film deposited on a glass substrate; the inset shows images of the sample under room light and 365 nm UV light. (b) Absorption spectra of a 0.2 wt % CdTe (510 nm)/PMMA and a 0.5 wt % CdTe(565nm)/PMMA nanocomposite sample; the highly transparent samples were shown in the inset photograph. Samples with various emission colors under a 365 nm UV lamp were also shown.

Image of FIG. 3.
FIG. 3.

(a) X-ray image of CdTe and CdSe QD solution samples in containers (left: CdTe; right: CdSe). [(b)–(d)] X-ray imaging resolution study on a CdTe/PVA nanocomposite film; a 0.1 mm thick Pb mask was used. (b) Area with resolution of 1.8–3.1 lines/mm. (c) Low resolution area with 0.6 lines/mm. (d) Enlarged image of higher resolution area with 4.3–5.0 lines/mm.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: CdTe quantum dots and polymer nanocomposites for x-ray scintillation and imaging