Shanghai University

About: Shanghai University is a education organization based out in Shanghai, Shanghai, China. It is known for research contribution in the topics: Microstructure & Catalysis. The organization has 59583 authors who have published 56840 publications receiving 753549 citations. The organization is also known as: Shànghǎi Dàxué.

Enlargement of Gold Nanoparticles on the Surface of a Self-Assembled Monolayer Modified Electrode: A Mode in Biosensor Design

Abstract: Gold nanoparticle (Au-NP) seeds were adsorbed onto the surface of a self-assembled monolayer (SAM)-modified electrode. With the treatment of this modified electrode by Au-NPs growth solution containing different concentrations of H2O2 or cholesterol along with cholesterol oxidase (ChOx), the Au-NP seeds on the electrode surface were enlarged in varying degrees. As a result, the peak currents in corresponding cyclic voltammograms were inversely proportional to the concentration of H2O2 or cholesterol. ChOx was also further modified onto the surface of Au/SAM/Au-NP electrode to prepare Au/SAM/Au-NP/ChOx electrode. Using the enzyme-modified electrode to detect cholesterol, which also utilized the enlargement of the NPs, an extraordinary low detection limit of 5 × 10-9 M was achieved and two linear dependence ranges of 7.5 × 10-8−1 × 10-6 and 1 × 10-6−5 × 10-5 M were obtained. Consequently, new kinds of H2O2 and cholesterol biosensors could be fabricated.

A Junctionless Nanowire Transistor With a Dual-Material Gate

Abstract: A dual-material-gate junctionless nanowire transistor (DMG-JNT) is proposed in this paper. Its characteristic is demonstrated and compared with a generic single-material-gate JNT using 3-D numerical simulations. The results show that the DMG-JNT has a number of desirable features, such as high ON-state current, a large ON/OFF current ratio, improved transconductance Gm, high unity-gain frequency fT, high maximum oscillation frequency fMAX, and reduced drain-induced barrier lowering. The effects of different control gate ratios Ra and varied work-function differences between the two gates are studied. Finally, the optimization of Ra and the work-function difference for the proposed DMG-JNT is presented.

Unequal Care, Unequal Work: Toward a more Comprehensive Understanding of Gender Inequality in Post-Reform Urban China

Abstract: Over the last four decades, as China has transitioned from a socialist centralized economy to a productivity-and-efficiency-oriented market economy, so too have the country’s public and private spheres become increasingly differentiated. Although others attribute changing gender inequality to the market transition, we draw from Chinese feminist critical analyses and propose a theoretical framework regarding how the two-sphere separation in contemporary China, embedded in how gender equality was organized in the socialist time, has been driven by the state and is further justified by changing gender ideologies. We review the existing literature and identify gaps in research on how women’s disadvantages in the public and private spheres—in the labor market and within the family—mutually reinforce each other in post-reform urban China. We also discuss how the dynamics of, and interactions between, the two spheres are justified by a changing gender ideology. Finally, by exploring gender inequality in the process of the two-sphere separation in a transitional context, we make an important contribution to the general sociological and gender literature.

Design of pomegranate-like clusters with NiS2 nanoparticles anchored on nitrogen-doped porous carbon for improved sodium ion storage performance

Abstract: Nickel sulfide, a promising anode for sodium-ion batteries (SIBs), has drawn a lot of attention due to its natural abundance, low cost, rich types and high theoretical specific capacity (Ni3S2: 446, NiS: 591 and NiS2: 879 mA h g−1). However, the huge volume change induced severe electrode pulverization results in the low specific capacity and poor cycling stability of nickel sulfide electrodes. Herein, in this paper, we developed a metal–organic framework (MOF) strategy to prepare pomegranate-like clusters with small NiS2 nanoparticles anchored on nitrogen doped porous graphitic carbon networks (NiS2/NC) via successive carbonization and sulfidation. When evaluated as an anode for SIBs, the as-prepared NiS2/NC hybrid exhibited a high reversible capacity of 505.7 mA h g−1 after 100 cycles at 0.1 A g−1, excellent rate capability (294.4 mA h g−1 at 3 A g−1) and robust cycling stability with a capacity of 356.2 mA h g−1 after 300 cycles at 0.5 A g−1, which outperforms most of the nickel sulfide based electrodes reported so far. The excellent cycling performance and rate capability for SIBs can be attributed to the unique structure inherited from nickel based MOFs, in situ fabrication strategy, high capacity of NiS2, and conductive and buffering features of the nitrogen-doped graphitic carbon networks, demonstrating the great potential of the as-prepared NiS2/NC hybrid for high-performance SIBs.

Supramolecular Polymers Based on Efficient Pillar[5]arene—Neutral Guest Motifs

Abstract: Neutral and efficient: A neutral guest with a cyano site and a triazole site, which can be easily prepared and modified, is demonstrated to strongly bind with pillar[5]arene. Based on this new recognition motif, two neutral supramolecular polymers in organic media, which are currently unfeasible by means of host-guest interactions of crown ethers and calixarenes, were fabricated. One is AA/BB-type, and the other is A2/B3-type.