Open AccessECL emission of non‐stoichiometric quaternary Zn–Cu–In–S QDs
Author(s) -
Feng Jian,
Xu Hong
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0669
Subject(s) - quantum dot , high resolution transmission electron microscopy , photoluminescence , stoichiometry , inductively coupled plasma , copper , analytical chemistry (journal) , materials science , transmission electron microscopy , crystallinity , chemistry , inorganic chemistry , nanotechnology , plasma , physics , optoelectronics , chromatography , quantum mechanics , metallurgy , composite material
Non‐stoichiometric colloidal quaternary Zn–Cu–In–S quantum dots (QDs) with different Cu content were prepared by a hot injection method and the enhanced electrogenerated chemiluminescence (ECL) were presented. Zn–Cu–In–S QDs were characterised by transmission electron microscopy (TEM), X‐ray diffraction (XRD), UV‐Vis, photoluminescence (PL) and inductively coupled plasma mass spectrometer (ICP‐MS). XRD results revealed the compositional homogeneity of the Zn–Cu–In–S QDs. Average particle size of Zn–Cu–In–S QDs samples were 2.3–2.8 nm. The HRTEM analysis indicated the high crystallinity. The ICP‐MS measurements confirmed that the compositions of Zn–Cu–In–S QDs could be controlled precisely. Zn–Cu–In–S QDs were coated on glassy carbon electrode (GCE) with tetrabutylammonium hexafluorophosphate (TBAPF 6 ). The ECL of Zn–Cu–In–S QDs were observed, which possessed extremely increase with tripropyl amine added as the coreactant. The ECL of Zn–Cu–In–S QDs were attribute to the copper related surface state. The Zn–Cu–In–S QDs modified GCE exhibited excellent ECL properties, environmentally‐friendly and good stability, which implied further promising applications in bioanalysis.