Spectral insights into the transformation and distribution of CdSe quantum dots in microorganisms during food-chain transport

doi:10.1038/s41598-017-04694-6

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	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
刊名	SCIENTIFIC REPORTS
	2017
卷号	7 期号:-页码:-
关键词	Ray-absorption Spectroscopy Caenorhabditis-elegans Silver Nanoparticles Raman-scattering Exposure
ISSN号	2045-2322
DOI	10.1038/s41598-017-04694-6
文献子类	期刊论文
英文摘要	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.
WOS关键词	RAY-ABSORPTION SPECTROSCOPY ; CAENORHABDITIS-ELEGANS ; SILVER NANOPARTICLES ; RAMAN-SCATTERING ; EXPOSURE
语种	英语
WOS记录号	WOS:000404332100008
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/28826]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	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):-.