具有胶体稳定性、pH 无关的正表面电荷以及近红外到红色光谱范围内尺寸可调光致发光的阳离子硅纳米晶体。

Cationic Silicon Nanocrystals with Colloidal Stability, pH-Independent Positive Surface Charge and Size Tunable Photoluminescence in the Near-Infrared to Red Spectral Range.

作者信息

Chen Kenneth K, Liao Kristine, Casillas Gilberto, Li Yiying, Ozin Geoffrey A

机构信息

Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada.

UOW Electron Microscopy Centre University of Wollongong Wollongong New South Wales 2500 Australia.

出版信息

Adv Sci (Weinh). 2016 Jan 21;3(2):1500263. doi: 10.1002/advs.201500263. eCollection 2016 Feb.

DOI:10.1002/advs.201500263

PMID:27812459

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5066801/

Abstract

In this report, the synthesis of a novel class of cationic quaternary ammonium-surface-functionalized silicon nanocrystals (ncSi) using a novel and highly versatile terminal alkyl halide-surface-functionalized ncSi synthon is described. The distinctive features of these cationic ncSi include colloidal stability, pH-independent positive surface charge, and size-tunable photoluminescence (PL) in the biologically relevant near-infrared-to-red spectral region. These cationic ncSi are characterized via a combination of high-resolution scanning transmission electron microscopy with energy-dispersive X-ray analysis, Fourier transform infrared, X-ray photoelectron, and photoluminescence spectroscopies, and zeta potential measurements.

摘要

在本报告中，描述了使用一种新型且用途广泛的末端卤代烷基表面功能化的纳米晶硅（ncSi）合成子来合成一类新型的阳离子季铵盐表面功能化的硅纳米晶体（ncSi）。这些阳离子ncSi的独特特性包括胶体稳定性、与pH无关的正表面电荷以及在生物相关的近红外到红光光谱区域内尺寸可调的光致发光（PL）。通过高分辨率扫描透射电子显微镜结合能量色散X射线分析、傅里叶变换红外光谱、X射线光电子能谱、光致发光光谱以及zeta电位测量等方法对这些阳离子ncSi进行了表征。