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Atmospheric Oxygen Binding and Hole Doping in Deformed Graphene on a SiO2 Substrate
Sunmin Ryu, Li Liu, Stephane Berciaud +5
Using micro-Raman spectroscopy and scanning tunneling microscopy, we study the relationship between structural distortion and electrical hole doping of graphene on a silicon dioxid…
Imaging Stacking Order in Few-Layer Graphene
Chun Hung Lui, Zhiqiang Li, Zheyuan Chen +3
Few-layer graphene (FLG) has been predicted to exist in various crystallographic stacking sequences, which can strongly influence the electronic properties of FLG. We demonstrate a…
Anomalous Lattice Vibrations of Single and Few-Layer MoS2
Changgu Lee, Hugen Yan, Louis E. Brus +3
Molybdenum disulfide (MoS2) of single and few-layer thickness was exfoliated on SiO2/Si substrate and characterized by Raman spectroscopy. The number of S-Mo-S layers of the sample…
Electron and optical phonon temperatures in electrically biased graphene
Stéphane Berciaud, Melinda Y. Han, Louis E. Brus +2
We examine the intrinsic energy dissipation steps in electrically biased graphene channels. By combining in-situ measurements of the spontaneous optical emission with a Raman spect…
Energy Transfer from Individual Semiconductor Nanocrystals to Graphene
Zheyuan Chen, Stéphane Berciaud, Colin Nuckolls +2
Energy transfer from photoexcited zero-dimensional systems to metallic systems plays a prominent role in modern day materials science. A situation of particular interest concerns t…
Excitons and high-order optical transitions in individual carbon nanotubes
Stephane Berciaud, Christophe Voisin, Hugen Yan +6
We examine the excitonic nature of high-lying optical transitions in single-walled carbon nanotubes by means of Rayleigh scattering spectroscopy. A careful analysis of the principa…