Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport
Tian, LJ; Peng, Y; Chen, DL; Ma, JY; Yu, HQ; Li, WW
2017
发表期刊SCIENTIFIC REPORTS
ISSN2045-2322
卷号7期号:-页码:-
文章类型期刊论文
摘要The discharge of engineered nanomaterials (ENMs) into environment is raising widespread concern not only due to their direction bio-toxicity but also their bio-concentration and bio-magnification through food web. However, the transformation and distribution of ENMs during food-chain transport are poorly understood, due to lack of accurate, reliable analytical methods. In this study, by using a suite of advanced spectrum techniques, we successfully tracked the distribution and biotransformation dynamics of CdSe quantum dots (QDs) during their transport from Shewanella onedensis to Caenorchabditis elegans in predation. Fluorescence microscopy and Raman mapping showed that the ingested QDs by C. elegans were located at the gut lumen and subcutaneous tissue, and were partially excreted from the nematode body over time. Micro-X-ray fluorescence (mu-XRF) spectroscopy and Se K-edge X-ray absorption fine structure (XAFS) results further revealed the changed distribution of Se element over time, and a shift in the major Se species from CdSe to Se-0 and Na2SeO3 IV. This work demonstrates the utility of advanced spectral techniques for characterizing QDs in vivo, and may facilitate a better understanding on the environmental transformation and fates of ENMs.
关键词Ray-absorption Spectroscopy Caenorhabditis-elegans Silver Nanoparticles Raman-scattering Exposure
DOI10.1038/s41598-017-04694-6
关键词[WOS]RAY-ABSORPTION SPECTROSCOPY ; CAENORHABDITIS-ELEGANS ; SILVER NANOPARTICLES ; RAMAN-SCATTERING ; EXPOSURE
收录类别SCI
语种英语
WOS记录号WOS:000404332100008
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28826
专题中科院上海应用物理研究所2011-2018年
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Tian, LJ,Peng, Y,Chen, DL,et al. Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport[J]. SCIENTIFIC REPORTS,2017,7(-):-.
APA Tian, LJ,Peng, Y,Chen, DL,Ma, JY,Yu, HQ,&Li, WW.(2017).Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport.SCIENTIFIC REPORTS,7(-),-.
MLA Tian, LJ,et al."Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport".SCIENTIFIC REPORTS 7.-(2017):-.
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