Capital Normal University

About: Capital Normal University is a education organization based out in Beijing, China. It is known for research contribution in the topics: Terahertz radiation & Quantum entanglement. The organization has 11441 authors who have published 11988 publications receiving 159071 citations. The organization is also known as: Shǒudū Shīfàn Dàxué.

Ube2s regulates Sox2 stability and mouse ES cell maintenance.

Abstract: Sox2 has a critical role in embryonic stem (ES) cell maintenance and differentiation. Interestingly, its activity is highly dosage-dependent. Although transcriptional regulation of Sox2 has been extensively studied, the mechanisms orchestrating its degradation remain unclear. In this study, we identified ubiquitin-conjugating enzyme E2S (Ube2s) as a novel effector for Sox2 protein degradation. Ube2s mediates K11-linked polyubiquitin chain formation at the Sox2-K123 residue, thus marking it for proteasome-mediated degradation. Besides its role in fine-tuning the precise level of Sox2, Ube2s reinforces the self-renewing and pluripotent state of ES cells. Importantly, it also represses Sox2-mediated ES cell differentiation toward the neural ectodermal lineage.

Tautomeric Molecule Acts as a "Sunscreen" for Metal Halide Perovskite Solar Cells.

Abstract: UV light always does great harm to perovskite solar cells, relentlessly degrading perovskites and shortening the lifetime of perovskite devices. Meanwhile, surface defects in perovskite films further accelerate the degradation process and serve as nonradiative charge recombination centers to deteriorate device efficiency. Herein, we demonstrate that a "sunscreen" molecule, 2-hydroxy-4-methoxybenzophenone, not only protects the perovskite solar cell from UV degradation but also enables molecular defect passivation through interaction between functional groups and defects by molecular tautomerism under UV light illumination. Therefore, the sunscreen strategy efficiently enhances the UV endurance of PSCs and improves defect formation energy to -1.35 eV. The perovskite solar cell with sunscreen (sunscreen PSC) exhibits outstanding efficiencies of up to 23.09 % (0.04 cm2 ) and 19.73 % (1.00 cm2 ) as well as long-term UV (UVa: 365 nm and UVb: 285 nm) stability.

Emotional Intelligence Mediates the Relationship between Age and Subjective Well-Being.

Abstract: Individuals’ Subjective Well-being (SWB) increases as they grow older. Past literature suggests that emotional intelligence may increase with age and lead to higher levels of SWB in older adults. The primary purpose of the present study was to test whether emotional intelligence would mediate the relationship between age and SWB. A total of 360 Chinese adults (age range: 20 to 79 years old) participated in this study. They filled out questionnaires that assessed their age, life satisfaction (The Satisfaction with Life Scale), affective well-being (The Positive and Negative Affect Schedule), and emotional intelligence (The Wong and Law Emotional Intelligence Scale). Using Structural Equation Modeling, the mediation model was supported, χ2 (75) = 194.21, p < .01; RMSEA = .07; CFI = .91. Emotional intelligence partially mediated the relationship between age and life satisfaction, and fully mediated the relationship between age and affective well-being. The findings suggest that older adults may use their inc...

Multi-color perovskite nanowire lasers through kinetically controlled solution growth followed by gas-phase halide exchange

Abstract: Integration of multi-color semiconductor nanowire lasers (NWLs) on a silicon substrate is a very challenging task, owing to both the material lattice mismatch and the incompatible growth temperature. Recently, organic–inorganic perovskite (CH3NH3PbX3; X = Cl, Br, I) NWLs have been developed using a surface-initiated solution-growth method, which, however, requires post-synthesis transfer of nanowires from a growth substrate to a silicon wafer for device fabrication. Herein, we report multi-color perovskite nanowire lasers on arbitrary substrates (silicon or quartz substrates) through kinetically controlled growth followed by gas-phase halide exchange. First, we developed an antisolvent–vapor-diffusion induced crystallization method to kinetically direct the growth of CH3NH3PbCl3 towards single-crystal nanowires rather than the crystal habit of plate-like morphology. The ratio of nanowires to square microplates was adjusted to be as high as 97% : 3%. Then we introduced a gas-phase halide-anion-exchange reaction to convert chloride nanowires into bromide and iodide ones upon exposure to the vapor of HX (X = Br, I), while preserving both the high crystallinity and the nanowire morphology. Upon optical excitation, Fabry–Perot lasing around 550 and 785 nm occurs from CH3NH3PbBr3 and CH3NH3PbI3 nanowires with an onset of 9.8 and 9.2 μJ cm−2, respectively, with a maximum quality factor of 1260.