在水溶液中合成高度稳定的荧光 Ag 纳米团簇@聚合物纳米粒子。

Synthesis of highly stable fluorescent Ag nanocluster @ polymer nanoparticles in aqueous solution.

机构信息

State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, PR China.

出版信息

Nanoscale. 2011 Nov;3(11):4670-5. doi: 10.1039/c1nr10590f. Epub 2011 Oct 5.

PMID:21971881

Abstract

Water-soluble, highly stable fluorescent Ag nanoclusters have been synthesized using a novel core/shell solid polymer (PMMA/PMMA-PMAA) nanoparticles as a novel template. The photoluminescence, ultraviolet-visible absorption, X-ray photoelectron (XPS), laser desorption time of flight mass spectroscopies (LDI-ToF-MS) and transmission electron microscopy (TEM) were carried out to characterize the optical properties and morphologies of Ag nanoclusters. The quantum yield of Ag nanoclusters reached 6% and the lifetime of Ag nanoclusters was 0.460 ns. Because of the protective structure of three-dimensional network of the polymer template, the Ag nanoclusters have high stability. And this highly stable fluorescent Ag nanoclusters have successfully been applied for bioimaging.

摘要

已使用新型核/壳固态聚合物（PMMA/PMMA-PMAA）纳米颗粒作为新型模板合成了水溶性、高稳定性的荧光 Ag 纳米团簇。通过光致发光、紫外-可见吸收、X 射线光电子能谱（XPS）、激光解吸飞行时间质谱（LDI-ToF-MS）和透射电子显微镜（TEM）对 Ag 纳米团簇的光学性质和形态进行了表征。Ag 纳米团簇的量子产率达到了 6%，Ag 纳米团簇的寿命为 0.460 ns。由于聚合物模板的三维网络的保护结构，Ag 纳米团簇具有高稳定性。这种高稳定性的荧光 Ag 纳米团簇已成功应用于生物成像。