Lei Wang

TL;DR: In this article, a common origin of green luminescence in carbon nanodots and GQDs is unraveled by ultrafast spectroscopy, according to the change of surface functional groups during surface chemical reduction experiments, which are also accompanied by obvious emission-type transform.

TL;DR: Experimental results demonstrate that the surface-modified SiNPs can be utilized as an extraordinary nanothermometer through FLT imaging and the extended relatively long fluorescence lifetime (FLT), with a monoexponential decay, makes such surface- modifiedSiNPs suitable for applications involving lifetime measurements.

TL;DR: In this article, the authors used femtosecond transient absorption spectroscopy (TAS) to measure the quantum confinement effect and molecule-like emission in green-fluorescence graphene quantum dots (GQDs), and the two characteristic fluorescence peaks that appear in all samples are attributed to independent moleculelike states.

TL;DR: In this article, four kinds of GQDs were synthesized by organic methods with certain chemical structures, and the clear photoluminescence (PL) was investigated by ultrafast spectroscopy.

TL;DR: In this article, the fundamental mechanism of ultrabright fluorescence from surface-modified colloidal silicon quantum dots is investigated in depth using ultrafast spectroscopy, which demonstrates the significant effect of surface molecular engineering.