Chang Sik Kim

Electrical metal contacts to two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDCs) are found to be the key bottleneck to the realization of high device performance due to strong Fermi level pinning and high contact resistances ( R c ). Until now, Fermi level pinning of monolayer TMDCs has been reported only theoretically, although that of bulk TMDCs has been reported experimentally. Here, we report the experimental study on Fermi level pinning of monolayer MoS 2 and MoTe 2

PURPOSE: To determine the effect of Ahmed glaucoma valve (AGV) implantation on corneal endothelial cells. METHODS: Ahmed glaucoma valves were implanted in 30 eyes of 30 patients with refractory glaucoma. Corneal endothelial cell density and shape was prospectively evaluated in both the subject and fellow eyes of each patient. Corneal specular microscopy was performed on the superior, superotemporal, superonasal and central corneal areas before and at 1, 6 and 12 months after surgery. RESULTS: A

The synthesis and cyclization of acyclic quinoxaline, pyridine, and pyrimidine enediynes ( 1 − 3 ) are described. These compounds were prepared using palladium(0) coupling of trimethylsilyl acetylene to o -dihalo- or o -halotriflic heteroarenes. All compounds were prepared in modest to good yields. The enediynes prepared were shown to undergo Bergman cyclization. Kinetics over a minimum of 3 half-lives were used to construct Arrhenius plots. Pyrimidine 3 was found to have an activation energy of

In case of uncomplicated AGV implantation, the cumulative risk of corneal decompensation was 3.3%, 5 years after the operation. The ECD loss was statistically greater in eyes with AGV than in control eyes without AGV, but the difference was significant only up to 2 years post surgery.

H pylori is thought to play a role in the pathogenesis of conjunctival MALT lymphoma, and H pylori with vacA s1 allele appears to be a virulent strain for conjunctival MALT lymphoma.

There was a significant decrease in RNFL thickness over time in BRVO and significant thinning at 6 months compared with the normal eye. Retinal nerve fiber layer thinning needs to be differentiated from glaucoma or systemic disease, but it should be considered the natural course after BRVO.

Abstract 2D molybdenum ditelluride (MoTe 2 ) has recently received significant attention due to its unique phase transition and ambipolar behavior as well as thickness‐dependent bandgap. The phase transition and electrical breakdown of various thickness MoTe 2 field‐effect transistors observed under high electric fields are addressed. Interestingly, the MoTe 2 exhibits phase transition from a semiconducting 2H phase to a metallic 1T′ almost simultaneously with electrical breakdown, and this is c

PURPOSE: To identify factors influencing vision-related quality of life (VRQOL) according to glaucoma severity. METHODS: A total of 901 patients with varying stages of glaucoma were recruited from the prospectively designed LIGHT (Life Quality of Glaucoma Patients Who Underwent Treatment) study organized by the Korean Glaucoma Society. Participants completed a basic questionnaire collecting socioeconomic status and clinical information, in addition to the 25-item National Eye Institute Visual Fu

Abstract Purpose To assess influence of the location of visual field (VF) loss on vision‐related quality of life (VRQOL) in patients with glaucoma. Methods We included 826 patients with primary open‐angle glaucoma ( POAG ) enrolled in the prospectively designed Life Quality of Glaucoma Patients Who Underwent Treatment (LIGHT) study organized by the Korean Glaucoma Society. We divided the integrated binocular visual field (IVF) into four regions and evaluated the associations between Rasch‐analys

Uracil-enediyne chimeras 4, 7, and 8 were prepared and examined for their propensity to undergo Bergman cyclization. Kinetic experiments showed lactam tautomers 7 and 8 reacted up to 25 times faster than lactim ether 4. Determination of the activation energy for each cycloaromatization reaction, along with radical trapping agent dependent studies, indicate the rate differences result from different ground state energies of the starting enediynes.