Pengcheng Chen

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We report a real-space visualization of the formation of hydrogen bonding in 8-hydroxyquinoline (8-hq) molecular assemblies on a Cu(111) substrate, using noncontact atomic force microscopy (NC-AFM). The atomically resolved molecular structures enable a precise determination of the characteristics of hydrogen bonding networks, including the bonding sites,(More)
We performed synchrotron x-ray diffraction and infrared (IR) experiments combined with evolutionary structure predictions and band structure calculations on Ag 2 Se to ß20 GPa. We present evidence for phase I (β-Ag 2 Se) as a potential three-dimensional topological insulator by its increase in optical band gap and the topologically nontrivial nature of its(More)
We investigated the feasibility of the combined detection of HLA-A2/MAGE-A3 epitope-specific cytotoxic T lymphocytes (CTLs) and serum alpha-fetoprotein (AFP) for specific diagnosis of hepatocellular carcinoma (HCC). We detected the frequency of MAGE-A3 epitopes (p112-120, KVAELVHFL) in spontaneous CTLs in the peripheral blood of HCC patients, liver(More)
The liver resident lymphoid population is featured by the presence of a large number of CD3(+)CD56(+) cells referred as natural T cells. In human hepatocellular carcinoma (HCC) patients, the natural T cells were found to be sharply decreased in tumor (5.871 ± 3.553%) versus non-tumor (14.02 ± 6.151%) tissues. More intriguingly, a substantial fraction of the(More)
To resolve the controversy over the functionalization effect on conductivity, we systematically investigate the structural and electronic properties of graphene covalently functionalized with phenyl groups. Using first-principles calculations combined with the model Hamiltonian analysis, we find that the structural stability, electronic and transport(More)
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