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Xiangfeng Duan

Chengjun Hu, Fengna Li, Yehui Duan, Xiangfeng Kong, Yingli Yan, Jinping Deng, Chengquan Tan, Guoyao Wu, Yulong Yin
Forty-eight Duroc × Large White × Landrace pigs with an average initial body weight of 77.09 ± 1.37 kg were used to investigate the effects of combination of leucine (Leu) with arginine (Arg) or glutamic acid (Glu) on muscle growth, free amino acid profiles, expression levels of amino acid transporters and growth-related genes in skeletal muscle. The animals were randomly assigned to one of the four treatment groups (12 pigs/group, castrated male:female = 1:1). The pigs in the control group were fed a basal diet (13% Crude Protein), and those in the experimental groups were fed the basal diet supplemented with 1...
February 28, 2019: Journal of Animal Physiology and Animal Nutrition
Junze Li, Jun Wang, Jiaqi Ma, Hongzhi Shen, Lu Li, Xiangfeng Duan, Dehui Li
Filterless narrowband photodetectors can realize color discrimination without filter or bulk spectrometer, thus greatly reducing the system volume and cost for many imaging applications. Charge collection narrowing has been demonstrated to be a successful approach to achieve filterless narrowband photodetections; nevertheless, it sacrifices the sensitivity of the photodetectors. Here we show a highly tunable narrowband photodetector based on two-dimensional perovskite single crystals with high external quantum efficiency (200%), ultralow dark current (10-12  A), and high on-off ratio (103 )...
February 18, 2019: Nature Communications
Yinzhao Zhong, Bo Song, Changbing Zheng, Fengna Li, Xiangfeng Kong, Yehui Duan, Jinping Deng
OBJECTIVES: This study aims to investigate the effects and roles of excess leucine (Leu) versus its metabolites α-ketoisocaproate (KIC) and β-hydroxy-β-methyl butyrate (HMB) on fatty acid composition and lipid metabolism in skeletal muscle of growing pigs. METHODS AND RESULTS: Thirty-two pigs with a similar initial weight (9.55 ± 0.19 kg) were fed one of the four diets (basal diet, L-Leu, KIC-Ca and HMB-Ca) for 45 days. Results indicated that dietary treatments did not affect the intramuscular fat (IMF) content (p > 0...
February 18, 2019: Journal of Animal Physiology and Animal Nutrition
Xiang Xu, Qiangqiang Zhang, Menglong Hao, Yuan Hu, Zhaoyang Lin, Lele Peng, Tao Wang, Xuexin Ren, Chen Wang, Zipeng Zhao, Chengzhang Wan, Huilong Fei, Lei Wang, Jian Zhu, Hongtao Sun, Wenli Chen, Tao Du, Biwei Deng, Gary J Cheng, Imran Shakir, Chris Dames, Timothy S Fisher, Xiang Zhang, Hui Li, Yu Huang, Xiangfeng Duan
Ceramic aerogels are attractive for thermal insulation but plagued by poor mechanical stability and degradation under thermal shock. In this study, we designed and synthesized hyperbolic architectured ceramic aerogels with nanolayered double-pane walls with a negative Poisson's ratio (-0.25) and a negative linear thermal expansion coefficient (-1.8 × 10-6 per °C). Our aerogels display robust mechanical and thermal stability and feature ultralow densities down to ~0.1 milligram per cubic centimeter, superelasticity up to 95%, and near-zero strength loss after sharp thermal shocks (275°C per second) or intense thermal stress at 1400°C, as well as ultralow thermal conductivity in vacuum [~2...
February 15, 2019: Science
Yuan Liu, Jian Guo, Enbo Zhu, Peiqi Wang, Vincent Gambin, Yu Huang, Xiangfeng Duan
With finite density of states and electrostatically tunble work function, graphene can function as a tunable contact for semiconductor channel to enable vertical field effect transistors (VFET). However, the overall performance, especially the output current density is still limited by the low conductance of the vertical semiconductor channel, as well as large series resistance of graphene electrode. To overcome these limitations, we construct a VFET by using single crystal InAs film as the high conductance vertical channel and self-aligned metal contact as the source-drain electrodes, resulting a record high current density over 45,000 A/cm2 at a low bias voltage of 1 V...
January 7, 2019: ACS Nano
Yunxin Liu, Johan Vanacken, Xianmei Chen, Junbo Han, Zhiqiang Zhong, Zhengcai Xia, Borong Chen, Huan Wu, Zhao Jin, Jun-Yi Ge, Junwei Huang, Lei Meng, Xiangfeng Duan, Yu Huang, Qing Peng, Victor V Moshchalkov, Yadong Li
Manipulation of light below the diffraction limit forms the basis of nanophotonics. Metals can confine light at the subwavelength scale but suffer from high loss of energy. Recent reports have theoretically demonstrated the possibility of light confinement below the diffraction limit using transparent dielectric metamaterials. Here, nanoscale light confinement (<λ/20) in transparent dielectric materials is shown experimentally through a luminescent nanosystem with rationally designed dielectric claddings...
December 27, 2018: Advanced Materials
Meiling Liu, Zipeng Zhao, Xiangfeng Duan, Yu Huang
Proton-exchange-membrane fuel cells (PEMFCs) are of considerable interest for direct chemical-to-electrical energy conversion and may represent an ultimate solution for mobile power supply. However, PEMFCs today are primarily limited by the sluggish kinetics of the cathodic oxygen reduction reaction (ORR), which requires a significant amount of Pt-based catalyst with a substantial contribution to the overall cost. Hence, promoting the activity and stability of the needed catalyst and minimizing the amount of Pt loaded are central to reducing the cost of PEMFCs for commercial deployment...
December 18, 2018: Advanced Materials
Chungseok Choi, Tao Cheng, Michelle Flores Espinosa, Huilong Fei, Xiangfeng Duan, William A Goddard, Yu Huang
The electrochemical carbon dioxide reduction reaction (CO2 RR) presents a viable approach to recycle CO2 gas into low carbon fuels. Thus, the development of highly active catalysts at low overpotential is desired for this reaction. Herein, a high-yield synthesis of unique star decahedron Cu nanoparticles (SD-Cu NPs) electrocatalysts, displaying twin boundaries (TBs) and multiple stacking faults, which lead to low overpotentials for methane (CH4 ) and high efficiency for ethylene (C2 H4 ) production, is reported...
December 14, 2018: Advanced Materials
Jiajun Chen, Enbo Zhu, Juan Liu, Shuai Zhang, Zhaoyang Lin, Xiangfeng Duan, Hendrik Heinz, Yu Huang, James J De Yoreo
Assembly of two-dimensional (2D) molecular arrays on surfaces produces a wide range of architectural motifs exhibiting unique properties, but little attention has been given to the mechanism by which they nucleate. Using peptides selected for their binding affinity to molybdenum disulfide, we investigated nucleation of 2D arrays by molecularly resolved in situ atomic force microscopy and compared our results to molecular dynamics simulations. The arrays assembled one row at a time, and the nuclei were ordered from the earliest stages and formed without a free energy barrier or a critical size...
December 7, 2018: Science
Daowei He, Yiliu Wang, Yu Huang, Yi Shi, Xinran Wang, Xiangfeng Duan
Two-dimensional layered materials (2DLMs) are of considerable interest for high-performance electronic devices for their unique electronic properties and atomically thin geometry. However, the atomically thin geometry makes their electronic properties highly susceptible to the environment changes. In particular, some 2DLMs (e.g., black phosphorus (BP) and SnSe2) are unstable and could rapidly degrade over time when exposed to ambient conditions. Therefore, the development of proper passivation schemes that can preserve the intrinsic properties and enhance their lifetime represents a key challenge for these atomically thin electronic materials...
December 4, 2018: Nano Letters
Yehui Duan, Liming Zeng, Changbing Zheng, Bo Song, Fengna Li, Xiangfeng Kong, Kang Xu
In recent years, chronic overnutrition, such as consumption of a high-fat diet (HFD), has been increasingly viewed as a significant modifiable risk factor for diseases such as diabetes and certain types of cancer. However, the mechanisms by which HFDs exert adverse effects on human health remains poorly understood. Here, this paper will review the recent scientific literature about HFD-induced inflammation and subsequent development of diseases and cancer, with an emphasis on mechanisms involved. Given the expanding global epidemic of excessive HFD intake, understanding the impacts of a HFD on these medical conditions, gaining great insights into possible underlying mechanisms, and developing effective therapeutic strategies are of great importance...
2018: Frontiers in Immunology
Enbo Zhu, Shiyi Wang, Xucheng Yan, Masoud Sobani, Lingyan Ruan, Chen Wang, Yuan Liu, Xiangfeng Duan, Hendrik Heinz, Yu Huang
The hierarchical control in biogenic minerals, from precise nanomorphology control to subsequent macroscopic assembly, remains a formidable challenge in artificial synthesis. Studies in biomineralization, however, are largely limited to atomic/molecular scale crystallization, devoting little attention to biomolecular higher order structures (HOSs) which impact critically on long-range assembly of biominerals. Here we demonstrate a biomimetic route that explores peptide HOSs on guiding nanocrystal formation and anisotropic assembly into hierarchical structures...
November 26, 2018: Journal of the American Chemical Society
Bei Zhao, Weiqi Dang, Yuan Liu, Bo Li, Jia Li, Jun Luo, Zhengwei Zhang, Ruixia Wu, Huifang Ma, Guangzhuang Sun, Yu Huang, Xidong Duan, Xiangfeng Duan
Two-dimensional (2D) layered materials have stimulated extensive research interest for their unique thickness-dependent electronic and optical properties. However, the layer-number-dependent studies on 2D materials to date are largely limited to exfoliated flakes with relatively small lateral size and poor yield. The direct synthesis of 2D materials with a precise control of the number of atomic layers remains a substantial synthetic challenge. Here we report a systematic study of chemical vapor deposition synthesis of large-area atomically thin 2D nickel telluride (NiTe2 ) single crystals and investigate the thickness dependent electronic properties...
October 31, 2018: Journal of the American Chemical Society
Chuancheng Jia, Marjan Famili, Marco Carlotti, Yuan Liu, Peiqi Wang, Iain M Grace, Ziying Feng, Yiliu Wang, Zipeng Zhao, Mengning Ding, Xiang Xu, Chen Wang, Sung-Joon Lee, Yu Huang, Ryan C Chiechi, Colin J Lambert, Xiangfeng Duan
Molecular transistors operating in the quantum tunneling regime represent potential electronic building blocks for future integrated circuits. However, due to their complex fabrication processes and poor stability, traditional molecular transistors can only operate stably at cryogenic temperatures. Here, through a combined experimental and theoretical investigation, we demonstrate a new design of vertical molecular tunneling transistors, with stable switching operations up to room temperature, formed from cross-plane graphene/self-assembled monolayer (SAM)/gold heterostructures...
October 2018: Science Advances
Yehui Duan, Yue Zhao, Qian Zhu, Qiaoli Cai, Huawei Li, Yulong Yin, Zhanbin Wang, Xiangfeng Kong
BACKGROUND: The arginine family amino acids (AFAAs) exert important roles in the metabolism, growth, and development of the conceptus. However, to date, few studies have investigated the effects of maternal nutrient levels on the concentrations and metabolism of AFAAs in the conceptus. RESULTS: Compared with low nutrient (LN) diets, high nutrient (HN) diets increased (P < 0.05) the concentrations of citrulline and proline (Pro) in plasma, the concentrations of arginine, glutamine, Pro, and ornithine (Orn) in the amniotic fluid; and the concentrations of all detected AFAAs in the allantoic fluid, which were most pronounced on day 45 of pregnancy...
October 9, 2018: Journal of the Science of Food and Agriculture
Zhaoyang Lin, Yuan Liu, Udayabagya Halim, Mengning Ding, Yuanyue Liu, Yiliu Wang, Chuancheng Jia, Peng Chen, Xidong Duan, Chen Wang, Frank Song, Mufan Li, Chengzhang Wan, Yu Huang, Xiangfeng Duan
Two-dimensional (2D) materials, consisting of atomically thin crystal layers bound by the van der Waals force, have attracted much interest because of their potential in diverse technologies, including electronics, optoelectronics and catalysis1-10 . In particular, solution-processable 2D semiconductor (such as MoS2 ) nanosheets are attractive building blocks for large-area thin-film electronics. In contrast to conventional zero- and one-dimensional nanostructures (quantum dots and nanowires, respectively), which are typically plagued by surface dangling bonds and associated trapping states, 2D nanosheets have dangling-bond-free surfaces...
October 2018: Nature
Yehui Duan, Lingyu Zhang, Fengna Li, Qiuping Guo, Cimin Long, Yulong Yin, Xiangfeng Kong, Mijun Peng, Wence Wang
BACKGROUND: The effects and roles of the leucine (Leu) metabolite β-hydroxy-β-methylbutyrate (HMB) in lipid metabolism in adipose tissues of pigs are still unknown. OBJECTIVES: This study was conducted to investigate the effects of excess Leu versus HMB on growth, carcass traits, and lipid metabolism in adipose tissues of growing pigs. METHODS AND RESULTS: Compared to control, the Leu/HMB group significantly increased/reduced weight of total fat mass, respectively, with a concurrent increase of serum adiponectin concentration (P < 0...
September 19, 2018: Food & Function
Yuan Liu, Xidong Duan, Yu Huang, Xiangfeng Duan
Two-dimensional semiconductors (2DSCs) have attracted considerable attention as atomically thin channel materials for field-effect transistors. Each layer in 2DSCs consists of a single- or few-atom-thick, covalently bonded lattice, in which all carriers are confined in their atomically thin channel with superior gate controllability and greatly suppressed OFF-state current, in contrast to typical bulk semiconductors plagued by short channel effects and heat generation from static power. Additionally, 2DSCs are free of surface dangling bonds that plague traditional semiconductors, and hence exhibit excellent electronic properties at the limit of single atom thickness...
August 13, 2018: Chemical Society Reviews
Jia Li, Bei Zhao, Peng Chen, Ruixia Wu, Bo Li, Qinglin Xia, Guanghua Guo, Jun Luo, Ketao Zang, Zhengwei Zhang, Huifang Ma, Guangzhuang Sun, Xidong Duan, Xiangfeng Duan
Two-dimensional materials with intrinsic magnetism have recently drawn intense interest for both the fundamental studies and potential technological applications. However, the studies to date have been largely limited to mechanically exfoliated materials. Herein, an atmospheric pressure chemical vapor deposition route to ultrathin group VB metal telluride MTe2 (M = V, Nb, Ta) nanoplates with thickness as thin as 3 nm is reported. It is shown that the resulting nanoplates can be systematically evolved from mostly thicker hexagonal domains to thinner triangular domains with an increasing flow rate of the carrier gas...
July 31, 2018: Advanced Materials
Huilong Fei, Juncai Dong, Chengzhang Wan, Zipeng Zhao, Xiang Xu, Zhaoyang Lin, Yiliu Wang, Haotian Liu, Ketao Zang, Jun Luo, Shenglong Zhao, Wei Hu, Wensheng Yan, Imran Shakir, Yu Huang, Xiangfeng Duan
Graphene-supported single atomic metals (G-SAMs) have recently attracted considerable research interest for their intriguing catalytic, electronic, and magnetic properties. The development of effective synthetic methodologies toward G-SAMs with monodispersed metal atoms is vital for exploring their fundamental properties and potential applications. A convenient, rapid, and general strategy to synthesize a series of monodispersed atomic transition metals (for example, Co, Ni, Cu) embedded in nitrogen-doped graphene by two-second microwave (MW) heating the mixture of amine-functionalized graphene oxide and metal salts is reported here...
August 2018: Advanced Materials
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