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Direction-Controlled Chemical Doping for Reversible G-Phonon Mixing in ABC Trilayer Graphene
Kwanghee Park, Sunmin Ryu
Not only the apparent atomic arrangement but the charge distribution also defines the crystalline symmetry that dictates the electronic and vibrational structures. In this work, we…
Reversible Sulfuric Acid Doping of Graphene Probed by in-situ Multi-Wavelength Raman Spectroscopy
Gwanghyen Ahn, Sunmin Ryu
Since lattice strain and charge density affect various material properties of graphene, a reliable and efficient method is required for quantification of the two variables. While R…
Redox-Governed Charge Doping Dictated by Interfacial Diffusion in Two-Dimensional Materials
Kwanghee Park, Haneul Kang, Seonghyun Koo +2
Controlling extra charge carriers is pivotal in manipulating electronic, optical, and magnetic properties of various two-dimensional (2D) materials. Nonetheless, the ubiquitous hol…
Variation of photoluminescence spectral line shape of monolayer WS2
Yongjae Kwon, Kangwon Kim, Wontaek Kim +2
The origin of the variation of photoluminescence (PL) spectra of monolayer tungsten disulfide (WS2) is investigated systematically. Dependence of the PL spectrum on the excitation…
Extremely high mobility over 5000 cm2/Vs obtained from MoS2 nanosheet transistor with NiOx Schottky gate
Hee Sung Lee, Seung Su Baik, Sung-Wook Min +7
Molybdenum disulfide (MoS2) nanosheet, one of two dimensional (2D) semiconductors, has recently been regarded as a promising material to break through the limit of present semicond…
Two-Dimensional Water Diffusion at a Graphene-Silica Interface
DaeEung Lee, Gwanghyun Ahn, Sunmin Ryu
Because of the dominant role of the surface of molecules and their individuality, molecules behave dis-tinctively in a confined space, which has far-reaching implications in many p…