Shenzhen, China

South University of Science and Technology of China is a public research university in Shenzhen, People's Republic of China. The establishment of the university has a great meaning to Chinese education. South University of Science and Technology is a national higher education and comprehensive reform experiment, bears exploration of the Chinese educational innovation. Wikipedia.

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Zeng H.,University of Hong Kong | Dai J.,South University of Science and Technology of China | Yao W.,University of Hong Kong | Xiao D.,Oak Ridge National Laboratory | Cui X.,University of Hong Kong
Nature Nanotechnology | Year: 2012

Most electronic devices exploit the electric charge of electrons, but it is also possible to build devices that rely on other properties of electrons. Spintronic devices, for example, make use of the spin of electrons. Valleytronics is a more recent development that relies on the fact that the conduction bands of some materials have two or more minima at equal energies but at different positions in momentum space. To make a valleytronic device it is necessary to control the number of electrons in these valleys, thereby producing a valley polarization. Single-layer MoS 2 is a promising material for valleytronics because both the conduction and valence band edges have two energy-degenerate valleys at the corners of the first Brillouin zone. Here, we demonstrate that optical pumping with circularly polarized light can achieve a valley polarization of 30% in pristine monolayer MoS 2. Our results, and similar results by Mak et al., demonstrate the viability of optical valley control and valley-based electronic and optoelectronic applications in MoS 2 monolayers. © 2012 Macmillan Publishers Limited. All rights reserved.

Duan J.,South University of Science and Technology of China | Li P.,South University of Science and Technology of China
Catalysis Science and Technology | Year: 2014

Primary amine catalysts derived from cinchona alkaloids have emerged as readily available, highly versatile and extremely powerful catalysts in asymmetric synthesis. In particular, they exhibit superior catalytic efficacy for successfully tackling major challenges in a variety of sterically hindered carbonyl compounds, which traditional approaches have not been able to address. This review aims to once again draw attention to this relatively underutilised process by highlighting the recent developments in the application of cinchona-based primary amine catalysts in asymmetric organocatalytic reactions. © The Royal Society of Chemistry.

Guo X.,South University of Science and Technology of China | Facchetti A.,Northwestern University | Facchetti A.,Polyera Corporation | Marks T.J.,Northwestern University
Chemical Reviews | Year: 2014

A study reviews the applications of organic semiconductors in two of the most active fields of organic optoelectronics: organic thin-film transistors (OTFTs) and organic solar cells (OSCs). Polymer semiconductors having a common structural component, the imide or amide functional group, connected to π-conjugated cores are specifically discussed in the study. Three critical OTFT performance parameters are charge carrier mobility, current modulation ratio, and threshold voltage. The performance parameters can be derived from the OTFT output and transfer characteristics.

He Z.,South University of Science and Technology of China | Jiang W.,South University of Science and Technology of China | Schalley C.A.,Free University of Berlin
Chemical Society Reviews | Year: 2015

Large protein-sized synthetic supramolecular architecture is rare and certainly has not yet achieved the structural and functional complexity of biomolecules. As multiple, identical copies of a few building blocks are repetitively used, a highly symmetrical architecture results with limitations in function. In marked contrast, functional structures in nature are often assembled with high geometric precision from many different building blocks. They cooperate in a complex way realizing energy conversion, mechanical motion or transport phenomena. Beyond self-assembly, the structurally and functionally complex biomolecular machines rely on self-sorting to correctly position all subunits through orthogonal recognition sites. Mimicking such self-sorting processes is a promising strategy for supramolecular synthesis - resulting in higher structural complexity and promising access to a more sophisticated function. The term "integrative self-sorting"was coined to describe the strategy to form well-defined assemblies with well-controlled subunit positions. The key process is the incorporation of two or more orthogonal binding motifs into at least some of the subunits. Modularity and programmability based on orthogonal yet similar binding motifs generate diversity and complexity. Integrative self-sorting is thus inherently related to systems chemistry. Depending on the individual binding motifs, (multi-)stimuli responsiveness can be achieved. When different recognition events en route to the final assembly occur on significantly different time scales, kinetic pathway selection is observed. In this account, we review the modularity, programmability, and emergent properties of integrative self-sorting, emphasizing its utility and perspective for complex supramolecular architectures. © The Royal Society of Chemistry 2015.

He J.,South University of Science and Technology of China | Kanatzidis M.G.,Northwestern University | Dravid V.P.,Northwestern University
Materials Today | Year: 2013

One of the intellectual challenges for next generation thermoelectric materials revolves around the synthesis and fabrication of hierarchically organized microstructures that do not appreciably compromise the innate high power factor of the chosen thermoelectric system, but significantly reduce lattice thermal conductivity to enhance the overall figure of merit, ZT. An effective emerging strategy is to introduce nanostructures into bulk thermoelectric materials, which allow for diverse phonon scattering mechanisms to reduce thermal conductivity. In this review, we present key examples to show the intricate but tractable relationship across all relevant length-scales between various microstructural attributes (point, line, interfacial and mesoscale defects; as well as associated elastic and plastic strain) and lattice thermal conductivity in systems based on PbTe matrices. We emphasize the need for an overarching panoscopic approach that enables specific design strategies for the next generation of thermoelectric materials. © 2013 Elsevier Ltd.

South University of Science and Technology of China | Date: 2016-05-31

A receiver is provided, wherein the receiver includes an antenna, a band pass filter and a frequency mixer electrically connected in sequence, and a local oscillator electrically connected with the frequency mixer, and further includes: a diplexer for separating and outputting high and low frequency components in a signal outputted by the frequency mixer; and a rectifying unit for converting the high frequency component outputted by the diplexer into direct current energy and storing the direct current energy in a storage battery. The diplexer introduced in the receiver separates a baseband signal and a carrier signal in the same path losslessly, respectively conducts information decoding and energy capture, implements simultaneous information and energy transfer, and does not need to change the present modulation technology, therefor having strong compatibility, being reasonable and simple in structure, and being easy to implement.

South University of Science and Technology of China | Date: 2016-05-31

A transmitting method and receiving method for simultaneous information and energy transfer comprises: determining a first pre-allocated parameter set of a first baseband signal based on a first optimized parameter set and according to a first optimized target and a first constraint condition set; determining a second pre-allocated parameter set of a second baseband signal based on a first optimized result and a second optimized parameter set and according to a second optimized target and a second constraint condition set; and processing the baseband signals into corresponding radio-frequency signals according to the first pre-allocated parameter set and the second pre-allocated parameter set and transmitting the radio-frequency signals through an antenna; the first baseband signal and the second baseband signal each being an information baseband signal or an energy baseband signal. Both the energy transfer efficiency and the information transfer rate are improved by optimizing the information signals and energy signals.

South University of Science and Technology of China | Date: 2016-05-31

A transmitting system and a receiving system for multi-carrier broadband simultaneous information and energy transfer are provided, the transmitting system comprising: a signal management control system, a baseband signal generating unit, an encoding unit, a serial-parallel conversion unit, a mapping unit, a modulation unit and a parallel-serial conversion unit. By adopting the transmitting system for simultaneous information and energy transfer, separate energy signals are transmitted simultaneously while the information signals are transmitted to the receiving end, and sufficient energy can be provided for the receiver. Besides, by optimizing information signal and energy signal through the optimization algorithm, not only the energy transfer efficiency but also the information transfer rate can be improved.

South University of Science and Technology of China | Date: 2014-11-19

A magnetic transmission apparatus is disclosed, wherein the magnetic transmission apparatus includes a still part (4), a first rotating shaft (81), a second rotating shaft (82), a first rotating part (1), a second rotating part (2), and a third rotating part (3); the first rotating part (1) is rigidly connected with the first rotating shaft (81); the second rotating part (2), the third rotating part (3) are fixed on the second rotating shaft (82); the first rotating part (1), the second rotating part (2), and the third rotating part (3) are successively distributed along an axial direction; the still part (4) includes a magnetic regulation seat (41) and a magnetic regulation ring (42); the second rotating part (2) is located inside the magnetic regulation ring (42); the first rotating part (1) includes a first iron core (11), a first permanent magnet (12), and a first support part (811); the second rotating part (2) includes a second iron core (21), and a second permanent magnet (22); the third rotating part (3) includes a third iron core (31), a third permanent magnet (32), and a second support part (821); the first iron core (11), the first permanent magnet (12), the magnetic regulation ring (42), the third permanent magnet (32) and the third iron core (31) are successively distributed along the axial direction. The first permanent magnet (12) and the third permanent magnet (32) are magnetized alternately and axially; the second permanent magnet (22) is magnetized alternately radially. The magnetic transmission apparatus has an axially and radially mixed magnetic circuit and can take full advantage of the magnetic modulation space and improve the torque density.

South University of Science and Technology of China | Date: 2015-06-08

A double-cantilever infrared detector based on single walled carbon nanotube and the manufacture method thereof are provided. The detector comprises: a substrate having a detection window extending through the substrate from the top surface to the bottom surface; two heterogeneous cantilevers, wherein each cantilever is located on the substrate and has a fixed end connected to the substrate and a free end suspended above the detection window; a single walled carbon nanotube film bridged between the two free ends of the two heterogeneous composite cantilevers, wherein the heterogeneous cantilevers include a first material layer and a second material layer located thereon, and the first material layer and the second material layer have different thermal expansion coefficients.

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