In ordered to prepare high capacitance pseudo-capacitive oxides, it is important to design nanostructures with appreciable mesopores. Supramolecular templating has become a popular method to synthesize ordered mesoporous metals; however, the application of the same technique to synthesis of high surface area oxides is more demanding. We present here, the synthesis of ordered mesoporous ruthenium metal by lyotropic liquid crystal templating and its electrochemical conversion to ordered mesoporous ruthenium oxide by a simple, room temperature procedure. The bulk, unsupported metallic ordered mesoporous ruthenium exhibits high surface area of 110 m 2 g -1 , which is comparable to typical supported Ru nanoparticles. The oxide analogue gives a high specific capacitance of 376 F g -1 , owing to the porous structure. These results demonstrate a possible facile and generic process to synthesize oxides with ordered nanostructures by utilization of the various phases that can be obtained with lyotropic liquid crystalline templates such as cubic, hexagonal, lamellar, etc. comparable to state-of-the-art, supported ruthenium nanoparticles.► Ordered mesoporous ruthenium was electrochemically converted to its oxide analogue, with high specific capacitance.
Abstract. The significance of disseminated tumor cells (DTCs) in bone marrow (BM) on tumor recurrence has not been investigated in patients with hepatocellular carcinoma (HCC). The aim of the present study was to clarify the molecular characteristics of DTCs that affect postoperative recurrence based on microRNA (miRNA) expression profiles in clinical HCC patients undergoing curative resection. DTCs were prospectively collected from the BM of preoperative HCC patients using immunomagnetic beads and subjected to miRNA microarray analysis. Microarray analysis of nine HCC patients (n=5 patients with postoperative HCC recurrence, n=4 patients without HCC recurrence) demonstrated that miR-615-3p is significantly upregulated in the DTCs of patients with recurrence compared to the DTCs from patients without recurrence. In vitro experiments demonstrated that the miR-615-3p expression level is significantly correlated with malignant characteristics in HCC cells. These data suggest that miR-615-3p in DTCs may play an important role in postoperative HCC recurrence, which suggests that miR-615-3p is a potential target molecule for regulating postoperative HCC recurrence.
The development of efficient technologies to adsorb volatile organic compounds (VOCs) is desirable given their adverse effects on human health and the environment. Herein, we report a crystalline material formed by intermolecular hydrogen bonds among bis(benzimidazole)NiCl2 complexes, where bis(benzimidazole) is phenylbis(benzimidazol-2-yl)methane), in conjunction with π–π stacking interactions as an adsorbent for polar VOCs such as ethers, aldehydes, ketones, carboxylic acids, esters, and chloroalkanes. The adsorbent maintains its single-crystalline state during the adsorption of the polar VOCs. A single-crystal X-ray diffraction study revealed that the intermolecular hydrogen bonds are the driving force for adsorption. We also found that the adsorption of oxygenated compounds (e.g., ethers, aldehydes, ketones, and esters) is more favorable than that of chloroalkanes such as chloroform and dichloromethane. Thus, this material can be used as an adsorbent for polar VOCs and as a separation material.
The direct gate leakage current in double-gate ntype MOSFETs with physical gate lengths of 10 nm is investigated. This work uses a combination of a two-dimensional non-equilibrium Green's function (NEGF) based upon a realspace expansion method and Poisson's equation, which are solved self-consistently. In the conventional 1D analysis of the gate leakage current, an optical potential or an imaginary energy has been necessary to broaden the energy level in the triangular quantum well for reduction of computational costs. It is found that, however, different from the results in the conventional 1D analysis, peaks in the current density energy spectra, equivalently the energy levels, are broadened even under zero drain bias condition due to the quantum mechanical scatterings in the presence of the source and drain electrodes. This fact proves that the optical potential used in the conventional 1D simulation merely models the effect of the existence of the electrodes and the 2D analysis gives more sound results.
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