4 papers
Visualizing plasmon coupling in closely-spaced chains of Ag nanoparticles by electron energy loss spectroscopy
Fengqi Song, Tingyu Wang, Xuefeng Wang +8
Anisotropic plasmon coupling in closely-spaced chains of Ag nanoparticles was visualized using the electron energy loss spectroscopy in a scanning transmission electron microscope.…
Calibrating the atomic balance by carbon nanoclusters
Fengqi Song, Xuefeng Wang, Rebecca C. Powles +9
Carbon atoms are counted at near atomic-level precision using a scanning transmission electron microscope calibrated by carbon nanocluster mass standards. A linear calibration curv…
Free-standing Graphene as Gold Standard
Fengqi Song, Ziyou Li, Zhiwei Wang +3
We demonstrate using graphene sheets as a novel mass standard in the scanning transmission electron microscopy (STEM) based mass spectrometry. Here, free-standing graphene sheets a…
Visualizing topological insulating Bi2Te3 quintuple layers on SiO2-capped Si substrates and its contrast optimization
Zhaoguo Li, Yuyuan Qin, Yuewen Mu +8
Thin Bi2Te3 flakes, with as few as 3 quintuple layers, are optically visualized on the SiO2-capped Si substrates. Their optical contrasts vary with the illumination wavelength, fla…