TY - JOUR
T1 - Facile synthesis of nitrogen-doped carbon dots for Fe3+ sensing and cellular imaging
AU - Gong, Xiaojuan
AU - Lu, Wenjing
AU - Paau, Man Chin
AU - Hu, Qin
AU - Wu, Xin
AU - Shuang, Shaomin
AU - Dong, Chuan
AU - Choi, Martin M.F.
N1 - Funding Information:
Financial supports from the Hundred Talent Programme of Shanxi Province, HKBU Faculty Research Grant (FRG1/13-14/039) and National Science Foundation of China (21175086, 21175087) are gratefully acknowledged. We would express our sincere thanks to Ms. Winnie Y.K. Wu of the Institute of Advanced Materials for taking the TEM images and XPS. The TEM was supported by the Special Equipment Grant from the University Grants Committee of the Hong Kong Special Administrative Region, China (Grant SEG_HKBU06).
PY - 2015/2/25
Y1 - 2015/2/25
N2 - A fast and facile approach to synthesize highly nitrogen (N)-doped carbon dots (N-CDs) by microwave-assisted pyrolysis of chitosan, acetic acid and 1,2-ethylenediamine as the carbon source, condensation agent and N-dopant, respectively, is reported. The obtained N-CDs are fully characterized by elemental analysis, transmission electron microscopy, high-resolution transmission electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction pattern, X-ray photoelectron spectroscopy, UV-vis absorption, and photoluminescence spectroscopy. Doping N heteroatoms benefits the generation of N-CDs with stronger fluorescence emission. As the emission of N-CDs is efficiently quenched by Fe3+, the as-prepared N-CDs are employed as a highly sensitive and selective probe for Fe3+ detection. The detection limit can reach as low as 10ppb, and the linear range is 0.010-1.8ppm Fe3+. The as-synthesized N-CDs have been successfully applied for cell imaging and detecting Fe3+ in biosystem.
AB - A fast and facile approach to synthesize highly nitrogen (N)-doped carbon dots (N-CDs) by microwave-assisted pyrolysis of chitosan, acetic acid and 1,2-ethylenediamine as the carbon source, condensation agent and N-dopant, respectively, is reported. The obtained N-CDs are fully characterized by elemental analysis, transmission electron microscopy, high-resolution transmission electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction pattern, X-ray photoelectron spectroscopy, UV-vis absorption, and photoluminescence spectroscopy. Doping N heteroatoms benefits the generation of N-CDs with stronger fluorescence emission. As the emission of N-CDs is efficiently quenched by Fe3+, the as-prepared N-CDs are employed as a highly sensitive and selective probe for Fe3+ detection. The detection limit can reach as low as 10ppb, and the linear range is 0.010-1.8ppm Fe3+. The as-synthesized N-CDs have been successfully applied for cell imaging and detecting Fe3+ in biosystem.
KW - Cell image
KW - Chitosan
KW - EDA
KW - Fe detection
KW - Nitrogen-doped carbon dots
UR - http://www.scopus.com/inward/record.url?scp=84925257774&partnerID=8YFLogxK
U2 - 10.1016/j.aca.2014.12.045
DO - 10.1016/j.aca.2014.12.045
M3 - Journal article
C2 - 25702277
AN - SCOPUS:84925257774
SN - 0003-2670
VL - 861
SP - 74
EP - 84
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
ER -