A pinboard by
Wenxin Mao

I was born and grew up in China. The time when I step in Australia, I felt everything is interesting. When I started my research on perovskite, I found it even more exciting!!!!

I like stay fresh and keep my head clear. camping and walking around in the lab are favourite activities


Silica encapsulated ultrasmall CuO quantum dots (QDs; CuO@SiO2) were synthesized by reverse microemulsion. The CuO QDs with sizes ranging from 2.0 to 1.0 nm with corresponding band gaps of 1.4 to 2.6 eV were prepared simply by varying the concentration of the Cu2+ precursor. The samples were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and UV−vis spectroscopy. The CuO@SiO2 composite displayed reversible thermochromism which resulted from the strong electron−phonon coupling of ultrasmall CuO in the confined space of SiO2 and the enhanced band-gap shift in the visible light region depending on temperature. Besides, the as synthesized CuO@SiO2 was found to be highly stable for reversible thermochromism due to the micropore structure of silica matrix and local confinement of the QDs.