Absorption of semiconductor nanocrystals by the aquatic invertebrate Ceriodaphnia dubia

被引：16

作者：

Ingle, Taylor M.

Alexander, Regina ^{[3
]}

Bouldin, Jennifer ^{[2
]}

Buchanan, Roger A. ^{[1
]}

机构：

[1] Arkansas State Univ, Arkansas Biosci Inst, Jonesboro, AR 72467 USA

[2] Arkansas State Univ, Ecotoxicol Res Facil, Jonesboro, AR 72467 USA

[3] Arkansas State Univ, Dept Biol Sci, Jonesboro, AR 72467 USA

来源：

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2008年 / 81卷 / 03期

关键词：

nanocrystals; nanoparticles; absorption; quantum dots;

D O I：

10.1007/s00128-008-9481-y

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

When incubated with nanomolar concentrations of fluorescent semiconductor nanocrystals in moderately hard water the fluorescence of living Ceriodaphnia dubia increased. Average pixel intensity of exposed animals was greater than that of unexposed animals and increased in a dose and exposure time-dependent-manner. Internal structures were clearly visible in exposed and unexposed animals but fluorescence was most intense in the region of the abdominal appendages of exposed animals. Since these nanoparticles contain significant quantities of the toxic metals cadmium and selenium, their accumulation from aquatic environments by this standard test organism has significant implications about their potential environmental toxicity.

引用

页码：249 / 252

页数：4

共 25 条

[1] Photochemical instability of CdSe nanocrystals coated by hydrophilic thiols [J].