用户名: 密码: 验证码:
银纳米团簇的制备及其作为荧光传感器的检测应用
详细信息    查看官网全文
摘要
我们合成了一种高效的荧光银纳米团簇——Ag@SG NCs,并使用UV-Vis、ESI-MS、TEM和IR等方法对其进行了表征。荧光测试表明,在水溶液中该团簇能有效应用于Mn~(2+)和-I的检测,并且可以通过比色吸收光谱法对Mn~(2+)和-I进一步区分。我们进一步探究了Ag@SG NCs纳米团簇在生物成像方面的潜在应用。基于MCF-7细胞的实验表明,所制备的Ag@SG NCs几乎没有毒性,并且可以有效穿透细胞膜。另外,向银团簇中加入Mn~(2+)和I~-前后引起的荧光变化可以使其应用于MCF-7细胞的荧光成像。因此,Ag@SG NCs在MCF-7细胞中具有的低毒性、良好的穿透性和独特的荧光性质说明它可能在生物方面具有广泛的应用前景。
We have synthesized fluorescent silver nanocluster — Ag-glutathione, which is found a-versatile chemosensor and operative for the detection of both manganese(Mn~(2+)) and iodine(I~-)ions. In addition, Mn~(2+) and I are further distinguished by the ratiometric absorption spectrometry method. Care was taken for the sufficient spectral analyses upon which we have fully demonstrated the chemosensing mechanisms of Ag@SG NCs applied in ions detection. Having expounded this issue, we further excavated the potential application of Ag@SG NCs in bioimaging. It is interesting to find that the as-prepared Ag@SG NCs are nontoxic and operative for fluorescence imaging of MCF-7 cells, with on/off alternation of fluorescence emission at the-presence of Mn~(2+) or I ions. The low cytotoxicity, good penetrability and fluorescence on/off property of Ag@SG NCs in MCF-7 cells suggest promising biological applications.
引文
[1]Qu,F.;Li,N.B.;Luo,H.Q.Anal.Chem.,2012,84:10373.
    [2]Wang,M.;Wu,Z.;Yang,J.;Wang,G.;Wang,H.;Cai,W.Nanoscale,2012,4:4087.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700