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| 1 | Electro-mechanically controlled assembly of reconfigurable 3D mesostructures and electronic devices based on dielectric elastomer platforms显示文摘The manufacture of 3D mesostructures is receiving rapidly increasing attention,because of the fundamental significance and practical applications across wide-ranging areas.The recently developed approach of buckling-guided assembly allows deterministic formation of complex 3D mesostructures in a broad set of functional materials;with feature sizes spanning nanoscale to centimeter-scale.Previous studies mostly exploited mechanically controlled assembly platforms using elastomer substrates;which limits the capabilities to achieve on-demand local assembly;and to reshape assembled mesostructures into distinct 3D configurations.This work introduces a set of design concepts and assembly strategies to utilize dielectric elastomer actuators as powerful platforms for the electro-mechanically controlled 3D assembly.Capabilities of sequential-local loading with desired strain distributions allow access to precisely tailored 3D mesostructures that can be reshaped into distinct geometries,as demonstrated by experimental and theoretical studies of?30 examples.A reconfigurable inductive-capacitive radio-frequency circuit consisting of morphable 3D capacitors serves as an application example. | Wenbo Pang Xu Cheng Haojie Zhao Xiaogang Guo Ziyao Ji Guorui Li Yiming Liang Zhaoguo Xue Honglie Song Fan Zhang Zheng Xu Lei Sang Wen Huang Tiefeng Li Yihui Zhang | 2020 | National Science Review2020，7，2： | 8 |
| 2 | Fractal desulfurization kinetics of high-sulfur coal显示文摘The pore structure characteristics of high-sulfur coal from Wansheng in Chongqing have been studied by a nitrogen adsorption method (BET). The effects of grinding and pre-treating with nitric acid on the inorganic sulfur content of coal have been investigated. Organic sulfur in coal pretreated with nitric acid was desulfurized by using propylene-glycol-KOH (PG-KOH). Fractal kinetic properties of these two desulfurization procedures were investigated by using fractal geometric theory. The results show that both the specific surface area and pore volume increased with the decrease in particle diameter. The microspore surface of coal had fractal characteristics; the fractal dimension was 2.48. The sulfur content decreased with the decrease in particle diameter by grinding. After pretreatment with nitric acid, the desulfurization ratio (DFR) of inorganic sulfur increased to over 99% and the DFR of total sulfur to over 70%. The desulfurization procedure of inorganic sulfur had fractal kinetic characteristics; its reactive fractal dimension was 2.94. The organic sulfur desulfurization procedure by PG-KOH was also tallied with fractal kinetic properties; the reactive fractal dimension was 2.57. The effect of temperature on the desulfurization ratio of organic sulfur can be described with an Arrhenius empirical equation. The rate constant, pre-exponential factor and the activation energy of the reaction increased with the decrease in particle diameter. | Xu Longjun Peng Tiefeng Zhang Dingyue Zhang Fukaia | 2012 | International Journal of Mining Science and Technology2012，22，1： | 7 |
| 3 | Leaching process and kinetics of manganese in low-grade manganese ore显示文摘Manganese was extracted from leaching low-grade manganese ore in sulfuric acid medium. The effects of granule diameter, leaching time, liquid/solid ratio (V/W) and the concentration of sulfuric acid were investigated through orthogonal and single factor experiments. The experimental results showed that the optimal leaching conditions are, size of 0.054mm, 120 minutes of reaction time, 3(V/W) of liquid/solid ratio and 30% of the concentration of sulfuric acid (g/g). Under those conditions, the leaching efficiency is 96.73%. The kinetics of the leaching process is in accordance with the characteristics of fractal reaction. | XIE Chao XU Longjun PENG Tiefeng CHEN Kun ZHAO Jing | 2013 | Chinese Journal Of Geochemistry2013，32，2： | 5 |
| 4 | Review of Soft Linear Actuator and the Design of a Dielectric Elastomer Linear Actuator显示文摘Natural muscle provides excellent motilities for animals.As the basic unit of the muscle system,the skeletal muscle fibers function as a soft linear actuator.Inspired by the muscle fibers,researchers have developed various soft active devices with linear actuation.This paper reviews several soft linear actu ators,such as the dielec trie elastomer,t hermal responsive hydrogels,pneumatic artificial muscle,and conducting polymers.The actuation mechanisms and performances of these soft linear actuators are summarized.Based on the dielectric elastomer,we propose a design of a hybrid system with linear actuation,driven by both the electric motor and dielectric elasto mer cone.The elec tromechanical behaviors of the dielec trie elastomer cone have been investigated in both experiment and finite element analysis.This work may guide the further design of soft actuators and robots. | Xunuo Cao Mingqi Zhang Zhen Zhang Yi Xu Youhua Xiao Tiefeng Li | 2019 | Acta Mechanica Solida Sinica2019，32，5： | 4 |
| 5 | Leaching of manganese residue for the preparation of trimanganese tetroxide with a high surface area显示文摘The accumulation of electrolytic manganese residue (EMR) has become a serious problem and its recycling will be of great benefit to protect the environment and assist sustainable development. The reusing method was conducted by leaching EMR with sulfuric acid and the optimal leaching condition was 1:3 (g/g) as the ratio of solid to liquid with 20% (g/g) H2SO4 , heating at 90 ℃ for 3 hours, which aims at extracting Mn in a sulfuric acid medium. The produced MnSO4 solution was precipitated by adding alkali and oxidized in aqueous phase. The oxidized products were characterized by various techniques, including X-ray powder diffraction (XRD), Fourier transform infrared (IR) spectrometry, vibrating sample magnetometry (VSM), with Brunauer-Emmett-Teller (BET) specific surface area instrument and laser particle size analyzer. The final products were confirmed to be a single-phase Mn3O4 . | PENG Tiefeng XU Longjun WANG Xingmin | 2013 | Chinese Journal Of Geochemistry2013，32，3： | 3 |
| 6 | Optical spectroscopy and crystal-field strength of Cr^(3+) in various solid matrixes显示文摘Cr^(3+): BeAl_2O_4 水晶, Cr^(3+): LiNbO_3 水晶,和 ZnO-Al_2O_3-SiO_2glass-ceramic 被 Czochralski 技术获得,布里奇曼方法,并且融化分别地处理。上述 Cr^(3+)-incorporatedsolid-state 材料的光吸收和排放系列被记录。为种 high-qualityCr^(3+) 的技术参数: BeAl_2O_4 和 Cr^(3+): LINbO_3 晶体被获得。结果显示 Cr^(3+) 的光吸收和荧光系列在各种各样的矩阵显示出许多差别。Thesharp 线排出物在 Cr^(3+) 被观察: BeAl_2O_4 和 Cr^(3+): LiNbO_3 晶体。为在不同矩阵的 Cr^(3+) 的 Thecrystal 地参数(D_q ) 从他们的相应系列被计算。它被显示那 Cr^(3+): BeAl_2O_4 和 Cr^(3+): LiNbO_3 属于 thehigh 地地点水晶,当时 Cr^(3+): ZnO-Al_2O_3-SiO_2 玻璃并且眼镜陶器属于 theweak 地地点水晶。 | XIA Haiping WANG Jinhao WANG Hongyin ZHANG Jianli ZHANG Yuepin XU Tiefeng | 2006 | Rare Metals2006，25，1： | 2 |
| 7 | Engineering of a self-adjuvanted iTEP-delivered CT vaccine显示文摘 | Shuyun DONGI Tiefeng XU Peng WANG Peng ZHAO Mingnan CHEN | 2017 | Acta Pharmacologica Sinica2017，38，6： | 2 |
| 8 | Cy5.5-MSA-G250 nanoparticles(CMGNPs)induce M1 polarity of RAW264. 7 macrophage cells via TLR4-dependent manner显示文摘Cy5.5-MSA-G250 nanoparticles(CMGNPs)had been proved to have unique advantages for cancer treatment,including excellent photothermal performance,tumor cell-selective cytotoxicity,direct visualization,and good biocompatibility.However,to cellular systems,the CMGNPs are considered as fo reign invaders,and the effect of CMGNPs on immunity system is still unknown.Therefore,more efforts are needed to understand the role of CMGNPs on the immunity system.In this study,we attempted to screen the pro-inflammatory responses on RAW264.7 macrophages after treated with the CMGNPs.In vitro experiments clearly showed that CMGNPs not only enhances phagocytosis capacity of RAW264.7 cells,but also promotes Ml polarization,associated with changes in cell morphology and increased expression of inflammatory cytokines.This ability to induce Ml polarization may be beneficial to CMGNPs to achieve better anticancer effects in clinical trials.Moreover,the observed Ml macrophages’ polarization triggered by CMGNPs can be abolished after adding TLR4 inhibitor,CLI095,suggesting that TLR4 is involved in CMGNP-induced inflammation. | Zhuoxuan Lu Lingfeng Xu Nongyue He Fengying Huang Tiefeng Xu Li Li Yanwei Zhang Liming Zhang | 2019 | Chinese Chemical Letters2019，30，6： | 2 |
| 9 | A study of non- linear optical properties in Bi2OrWO3-TeO2 glasses显示文摘 | CHEN Yanfei NIE Qiuhua XU Tiefeng | 2008 | J Non- Cryst Solids2008，354，29： | 1 |
| 10 | Surface-plasmon enhanced ultra -fast third -order optical nonlinearities in ellipsoidal gold nanopartic1es embedded bismuthate glasses 显示文摘 | Chen Feifei Dai Shixun Xu Tiefeng | 2011 | Chemical Physics Letters2011，514，： | 1 |
| 11 | Effect of radiation trapping on the emission properties of Er2+ :4113/2+4Iis/2 transition in oxide glasses显示文摘 | Dai Shixun Xiang Weidong Xu Tiefeng | 2008 | Opt Mater2008，30，9： | 1 |
| 12 | Preparation of strontium ferrite from strontium residue显示文摘Strontium ferrite was prepared from Strontium Waste Residue (SWR) as a material. Strontium chloride was obtained by leaching SWR with ammonia chloride, and then SrCl2 was converted to SrCO3. Strontium ferrite (SrFe12O19) was formed by roasting the mixture of SrCO3 and FeCl3 in a proper proportion. The structure and magnetic susceptibility of strontium ferrite were investi-gated. The results showed that strontium conversion ratio increased with decreasing SWR grain diameter. The largest ratio was pre-sented when n(NH4Cl/Sr) was 3.6. What is more, the conversion process coincided with the kinetic characteristics of fractal reaction. The magnetic susceptibility of strontium ferrite decreased with increasing Fe3+/Sr2+ mole ratio and pH. SrFe12O19 exhibited face-centered and cubic closely-packed hexagonal structures. There were the strong diffraction peaks of Fe2O3 in the X-ray diffracto-gram of strontium ferrite. Strontium recovery ratio was 87.0%. | LIU Chenglun XU Longjun YANG Xueyan PENG Tiefeng REN Jianjun | 2012 | Chinese Journal Of Geochemistry2012，31，1： | 1 |
| 13 | A Lower-power register file based on complementary pass-transistor adiabatic logic显示文摘 | Hu Jiangping Xu Tiefeng Li Hong | 2005 | IEICE Trans on Information and Systems2005，88，7： | 1 |
| 14 | α-Fe_2O_3 nanoplates with superior electrochemical performance for lithium-ion batteries显示文摘On account of the high theoretical capacity, high corrosion resistance, environmental benignity, abundant availability and low cost, the research on a-Fe_2O_3 has been gradually fastened on as promising anodes materials toward lithium-ion batteries(LIBs). A high-performance anode for LIBs based on α-Fe_2O_3 nanoplates have been selectively prepared. The α-Fe_2O_3 nanoplates can be synthesized with iron ionbased ionic liquid as iron source and template. The α-Fe_2O_3 nanoplates as the anode of LIBs can display high capacity of around1950 mAh g^(-1) at 0.5 A g^(-1) which have exceeded the theoretical capacity of α-Fe_2O_3. On account of unique nanoplate structures and gum arabic as binder, the α-Fe_2O_3 nanoplates also exhibit high rate capability and excellent cycling performance. | Li Xu Yuhui Tian Tiefeng Liu Henan Li Jingxia Qiu Sheng Li Huaming Li Shouqi Yuan Shanqing Zhang | 2018 | Green Energy & Environment2018，3，2： | 1 |
| 15 | Investigation of energy transfer and frequency upcon- version in Er^3+/Ho^3+ codoped tellurite glasses显示文摘 | ZHANG Xudong XU Tiefeng DAI Shixun | 2008 | J Alloy Compd2008，450，10： | 1 |
| 16 | Study of luminescence properties of novel Er^3+ single-doped and Er^3+/Yb^3+ co-doped tellurite glasses显示文摘 | Gao Yuan Nie Qiuhua Xu Tiefeng | 2005 | Spectrochimica Acta:Part A2005，61，： | 1 |
| 17 | Optical transitions of Er^3+/Yb^3+ codoped TeO2-WO3-Bi2O3 glass显示文摘 | Xiang Shen QiuHua Nie TieFeng Xu | 2005 | Spectrochim Acta Part A2005，61，： | 1 |
| 18 | PERFORMANCE IMPROVEMENT FOR A WCDMA RADIO OVER FIBER SYSTEM USING DIGITAL PRE-DISTORTER显示文摘In this paper,a Radio Over Fiber (ROF) system with a Digital Pre-Distorter (DPD) for WCDMA signal transmission is investigated.A Look-Up Table (LUT) based DPD and a Memory Polynomial (MP) DPD are applied in the ROF link so as to suppress the out-of-band spurious spectrum and improve the transmission performance.The experimental results show that the out-of-band emission due to existence of the third-order Inter-Modulation Distortion (IMD3) is obviously sup-pressed by these two DPD.An Adjacent Channel Power Ratio (ACPR) improvement of 8 dB is ob-tained for a single-carrier WCDMA signal transmission.These two DPD have equal ability in lin-earization of the ROF system for a three-carrier WCDMA signal transmission.There is no apparent memory effects exist in the ROF link. | Ying Xiangyue Xu Tiefeng Liu Taijun Nie Qiuhua | 2012 | Journal of Electronics(China)2012，29，1： | 1 |
| 19 | Green and red upconversion emission and energy-transfer between Er^3+ and Tm^3+ ions in tellurite glasses显示文摘 | Xiang Shen Qiuhua Nie Tiefeng Xu | 2004 | Phys Lett A2004，332，： | 1 |
| 20 | Optical transitions and upconverslon luminescence of Er^3+/Yb^3+ codoped lead - zinc - tellurite oxide glass 显示文摘 | Jin Zhe Nie Qiuhua Xu Tiefeng | 2007 | Materials Chemistry and Physics2007，104，1： | 1 |
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