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Bias Dependent Photocurrent Characteristics of Copper Sulfide Single Nanowires
Jungdong Kim,오은순,Yiming Yang,Dong Yu 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.69 No.2
We studied the photocurrent characteristics of copper sulfide nanowire devices under bias voltages. Under global illumination by a laser beam on the nanowire devices, the magnitude of the photocurrent was often found to be asymmetric with respect to the bias, and in some cases, even the direction of the photocurrent remained unchanged for a bias in the opposite direction. Such an unusual bias dependence can be explained by the asymmetry of the Schottky contacts near the electrodes and by the bias dependent electric field at the contacts, as was confirmed by using scanning photocurrent microscopy.
Optical properties and bridge photodetector integration of lead sulfide nanowires
Kim, Jungdong,Oh, Eunsoon,Xiao, Rui,Ritter, Sean,Yang, Yiming,Yu, Dong,Hee Im, Ju,Hyuk Kim, Sang,Jun Choi, Won,Park, Jae-Gwan IOP 2017 Nanotechnology Vol.28 No.47
<P>We studied optical properties and photocurrent characteristics of PbS nanowires grown by chemical vapor deposition. Distinct bandedge photoluminescence (PL) emission was observed in the mid-infrared spectral range and the quantum confinement effect estimated from the PL peak energy was within 40 meV, consistent with the average diameter of the nanowire (∼70 nm) being significantly larger than the exciton Bohr radius (∼18 nm). We also demonstrated interdigit photo detectors making use of these PbS nanowires suspended between two pre-patterned Ti electrodes, where Ti also acted as metal catalyst for the nanowire growth. The threshold wavelength of the photocurrent was found to be ∼3 <I>μ</I>m at room temperature.</P>
Young Beom Kwak,Yong Duk Lee,Jungdong Yu,Hye Hyun Yoo 한국분석과학회 2021 학술대회논문집 Vol.2021 No.11
Anamorelin is s selective agonist of the non-peptide growth hormone secretagogues (GHs). The illegal use of “GHs” for their anabolic activity is strongly prohibited by World Anti-Doping Agency (WADA). However, the metabolism study of anamorelin for forensic evidence has not been done in human yet. In this study, the in vitro metabolism of anamorelin was investigated in human liver microsomes (HLM) using molecular networking (MN). As a result, a total of 17 metabolites (M1-M12) nodes in MN were structurally connected and elucidated based on MS¹, MS² and FMOs test (M1, demethylation; M2, demethylation and desaturation; M3a-b, hydroxylation; M4a-d, di-hydroxylation; M5a-c, hydroxylation and demethylation; M7, N-dealkylation; M8, N-dealkylation and demethylation; M9, N-dealkylation and desaturation; M10, N-oxidation; M11, N-oxidation and hydroxylation; M12, N-oxidation and demethylation). MN analysis additionally detected 12 metabolites which had not been reported previously.