Joung Real Ahn

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The uniform growth of single-crystal graphene over wafer-scale areas remains a challenge in the commercial-level manufacturability of various electronic, photonic, mechanical, and other devices based on graphene. Here, we describe wafer-scale growth of wrinkle-free single-crystal monolayer graphene on silicon wafer using a hydrogen-terminated germanium(More)
In atrial myocytes lacking t-tubules, action potential triggers junctional Ca(2+) releases in the cell periphery, which propagates into the cell interior. The present article describes growing evidence on atrial local Ca(2+) signaling and on the functions of inositol 1,4,5-trisphosphate receptors (IP(3)Rs) in atrial myocytes, and show our new findings on(More)
Through an organometallic approach, ultrathin SnO(x)Fe(y)S(z) plates with ~2 nm single layer-thicknesses were obtained and their graphene composites showed very promising discharge capacities of up to 736 mA h g(-1) and excellent stabilities as anode materials in lithium ion batteries.
For graphene to be used in semiconductor applications, a 'wide energy gap' of at least 0.5 eV at the Dirac energy must be opened without the introduction of atomic defects. However, such a wide energy gap has not been realized in graphene, except in the cases of narrow, chemically terminated graphene nanostructures with inevitable edge defects. Here, we(More)
Gold deposited on silicon surfaces at the monolayer regime results in a variety of reconstructions. The most interesting ones are the (quasi-) one dimensional phases, featuring monatomic wires of gold. They promise exotic physical phenomena, such as the Luttinger liquid [1]. These wires can be grown on the flat Si(111) surface which yields three possible(More)
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