Nanjing Tech University

About: Nanjing Tech University is a education organization based out in Nanjing, China. It is known for research contribution in the topics: Catalysis & Membrane. The organization has 21827 authors who have published 21794 publications receiving 364050 citations. The organization is also known as: Nangongda & Nánjīng Gōngyè Dàxúe.

Unusual Air Filters with Ultrahigh Efficiency and Antibacterial Functionality Enabled by ZnO Nanorods.

Abstract: Porous membranes/filters that can remove airborne fine particulates, for example, PM2.5, with high efficiency at low energy consumption are of significant interest. Herein, we report on the fabrication of a new class of unusual superior air filters with ultrahigh efficiency and an interesting antibacterial functionality. We use atomic layer deposition (ALD) to uniformly seed ZnO on the surface of expanded polytetrafluoroethylene (ePTFE) matrix, and then synthesize well-aligned ZnO nanorods with tunable widths and lengths from the seeds under hydrothermal conditions. The presence of ZnO nanorods reduces the effective pore sizes of the ePTFE filters at little expense of energy consumption. As a consequence, the filters exhibit exceptional dust removal efficiencies greater than 99.9999% with much lower energy consumption than conventional filters. Significantly, the presence of ZnO nanorods strongly inhibits the propagation of both Gram positive and negative bacteria on the filters. Therefore, the functional...

Anthracene-based semiconductors for organic field-effect transistors

Abstract: Organic field-effect transistors (OFETs), reported for the first time in 1986, with favourable flexible potential and easy-fabrication properties, are complementary to traditional inorganic field-effect transistors. In fact, OFETs not only afford promising applications in flexible, lightweight circuits and displays, like radio frequency identification devices (RFIDs) and portable screens, they are also useful tools for understanding the charge transport in molecular solids. Anthracene, as a building block for the active layer in OFETs, has the noteworthy advantages of strong intermolecular interaction, due to its planar structure, and high air stability owing to its appropriate energy levels. In this review, 150 anthracene derivatives with substituents at peri- and end-positions are discussed, from the aspects of physicochemical properties, thin film morphology, crystalline characteristics, and charge mobility in OFETs. Particularly, we shed light on the analysis of molecular packing structures, through the investigation of single crystals and molecular modelling, and underline the extraordinary application of anthracene derivatives in organic light-emitting transistors.

Seismic responses of a large underground structure in liquefied soils by FEM numerical modelling

Abstract: A large underground subway structure could be severely damaged in a strong earthquake, such as the seismic damages of Daikai subway station in the 1995 Kobe earthquake. After the 1995 Kobe earthquake, the effects of earthquakes on underground structure became a hot topic. According to the seismic damage characteristics of the pipelines buried in the liquefiable soils, a large underground structure may be damaged ever more severely by the liquefaction. To examine the dynamic properties of saturated liquefiable soil, an existed constitutive model is revised and implanted into the commercial FEM software. Then the nonlinear seismic responses of large underground subway structures built in liquefiable soils are analyzed by a numerical modeling. The results of the comprehensive numerical analysis indicate that the existing subway station has a significant effect on the liquefaction of the nearby soils that are likely to be liquefied. The around sand soils under the suggested depth 20 m may be also liquefied under the influence of the large subway station, which should be non-liquefiable sand in many related codes of China. The subway station floats up as soon as the nearby soils are liquefied, and the soils accordingly flow from the lateral foundation to the bottom foundation of the subway station. It is also found that the floating of the subway station is completely out of sync in the main vibration stage of the inputted ground motions and the rising stage of the pore pressure, and it also lags behind in the main vibration stage for a considerable time and begins to stabilize only when the vibration weakens sharply and is close to zero. Generally, the dynamic softening soils under the subway station also have great effect on the seismic response of the large subway station.