Interfacial synthesis of polyethyleneimine-protected copper nanoclusters: Size-dependent tunable photoluminescence, pH sensor and bioimaging

CORC > 苏州纳米技术与纳米仿生研究所 > 中国科学院苏州纳米技术与纳米仿生研究所 > 先进材料研究部 > 姚亚刚团队

	Interfacial synthesis of polyethyleneimine-protected copper nanoclusters: Size-dependent tunable photoluminescence, pH sensor and bioimaging
	Wang, C; Yao, YG(姚亚刚); Song, QJ
刊名	COLLOIDS AND SURFACES B-BIOINTERFACES
	2016
卷号	140
通讯作者	Song, QJ ; Yao, YG(姚亚刚)
英文摘要	The copper nanoclusters (CuNCs) offer excellent potential as functional biological probes due to their unique photoluminescence (PL) properties. Herein, CuNCs capped with hyperbranched polyethylenimine (PEI) were prepared by the interfacial etching approach. The resultant PEI-CuNCs exhibited good dispersion and strong fluorescence with high quantum yields (QYs, up to 7.5%), which would be endowed for bioimaging system. By changing the reaction temperatures from 25 to 150 degrees C, the size of PEI-CuNCs changed from 1.8 to 3.5 nm, and thus tunable PL were achieved, which was confirmed by transmission electron microscopy (TEM) imagings and PL spectra. Besides, PEI-CuNCs had smart absorption characteristics that the color changes from colorless to blue with changing the pH value from 2.0 to 13.2, and thus they could be used as color indicator for pH detection. In addition, the PEI-CuNCs exhibited good biocompatibility and low cytotoxicity to 293T cells through MIT assay. Owing to the positively charged of PEI-CuNCs surface, they had the ability to capture DNA, and the PEI-CuNCs/DNA complexes could get access to cells for efficient gene expression. Armed with these attractive properties, the synthesized PEI-CuNCs are quite promising in biological applications. (C) 2016 Elsevier B.V. All rights reserved.
关键词[WOS]	FLUORESCENT GOLD NANOCLUSTERS ; ENHANCED GENE DELIVERY ; QUANTUM DOTS ; DIRECTED SYNTHESIS ; CU NANOCLUSTERS ; CARBON DOTS ; CLUSTERS ; NANOPARTICLES ; NANODOTS ; PLATFORM
收录类别	SCI
语种	英语
WOS记录号	WOS:000371445500044
内容类型	期刊论文
源URL	[http://ir.sinano.ac.cn/handle/332007/4690]
专题	苏州纳米技术与纳米仿生研究所_先进材料研究部_姚亚刚团队
推荐引用方式 GB/T 7714	Wang, C,Yao, YG,Song, QJ. Interfacial synthesis of polyethyleneimine-protected copper nanoclusters: Size-dependent tunable photoluminescence, pH sensor and bioimaging[J]. COLLOIDS AND SURFACES B-BIOINTERFACES,2016,140.
APA	Wang, C,Yao, YG,&Song, QJ.(2016).Interfacial synthesis of polyethyleneimine-protected copper nanoclusters: Size-dependent tunable photoluminescence, pH sensor and bioimaging.COLLOIDS AND SURFACES B-BIOINTERFACES,140.
MLA	Wang, C,et al."Interfacial synthesis of polyethyleneimine-protected copper nanoclusters: Size-dependent tunable photoluminescence, pH sensor and bioimaging".COLLOIDS AND SURFACES B-BIOINTERFACES 140(2016).