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Single-material Solvent-sensitive Fluorescent Actuator from Carbon Dots Inverse Opals Based on Gradient Dewetting

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Chinese Journal of Polymer Science 2017年第9期35卷 1043-1043,1044-1050页

作者： Jun-chao Liu Yuan-yuan Shang Da-jie zhang Zheng Xie 胡瑞祥王京霞 College of Chemistry and Chemical Engineering Hunan Normal University Changsha 410081 China Key Laboratory of Bio-inspired Materials and Interface Sciences Technical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 China Laboratory of Bioinspired materials School of Future Technology University of Chinese Academy of Sciences

A novel solvent-sensitive fluorescent actuator with reversibility has been obtained from carbon dots （CDs） inverse opals, which is prepared via infiltrating CDs solution into the interstice of colloidal crystal template, thermal polymerization of CDs materials and removing the colloidal template. The as-prepared CDs inverse opal actuator shows a bending angle of 75° in 10.2 s, bending rate of 7.35 （°）.s-1. In particular, the fluorescence intensity of the films varies during the actuating process. The actuating behavior is attributed to the inhomogeneous swelling/shrinking of the film, which originates from the gradient dewetting by solvent evaporation and hydrogen-bonding interaction between the solvent molecules and oxygen/hydrogen ions of CDs side chain. The CDs inverse opal actuator has the advantages of quick response, good repeatability and strong fluorescence, which gives an important insight into the design and manufacture of novel and advanced solvent-actuators.

关键词： Carbon dots inverse opal Fluorescent Single-material Gradient dewetting Solvent-actuator

Surface modification boosts exciton extraction in confined layered structure for selective oxidation reaction

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Science China Chemistry 2021年第11期64卷 1964-1969页

作者： Sen Jin Hui Wang Lei Li Xiao Luo Xianshun Sun Ming Zuo jie Tian Xiaodong zhang Yi Xie Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei230026China Institute of Energy Hefei Comprehensive National Science CenterHefei230031China

Extracting photogenerated species from bulk to surface is an essential process for gaining efficient semiconductor-based ***,compared with charged photogenerated carriers,neutral exciton exhibits negligible response to electric ***,traditional strategies involving band-alignment construction for boosting directional transfer of charge carriers are impracticable for extracting bulk *** this issue,we here propose that the extraction of bulk exciton could be effectively implemented by surface *** taking confined layered bismuth oxycarbonate(Bi_(2)O_(2)CO_(3))as an example,we highlight that the incorporation of iodine atoms on the surface could modify the micro-region electronic structure and hence lead to reduced energy of surface excitonic *** from the energy gradient between bulk and surface excitonic states,iodine-modified Bi_(2)O_(2)CO_(3)possesses high-efficiency bulk exciton extraction,and hence exhibits promoted performance in triggering1 O2-mediated selective oxidation *** work presents the positive role of surface modification in regulating excitonic processes of semiconductor-based photocatalysts.

关键词： exciton extraction selective oxidation reaction photocatalytic

Microwave Transmissions through Superconducting Coplanar Waveguide Resonators with Different Coupling Configurations

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Chinese Physics Letters 2013年第8期30卷 202-204页

作者： zhang Si-Lei LI Hai-jie WEI Lian-Fu FANG Yu-Rong WANG Yi-Wen ZHOU Pin-Jia WEI Qiang CAO chun-Hai XIONG Xiang-Zheng Quantum Optoelectronics Laboratory Southwest Jiaotong UniversityChengdu 610031 State Key Laboratory of Optoelectronic Materials Technologies Sun Yat-sen UniversityGuangzhou 510275 Institute of Electromagnetic Field and Microwave Technology Southwest Jiaotong UniversityChengdu 610031 Research Institute of Superconductor Electronics Nanjing UniversityNanjing 210093

We design and fabricate two types of superconducting niobium coplanar waveguide microwave resonators with different coupling capacitors on high purity Si *** microwave transmissions are measured at 20 *** is found that these two types of resonators possess significantly different loaded quality factors;one is 5.6×10^(3) and the other is 4.0×10^(4).The measured data are fitted well by classical ABCD matrix approach and consequently the coupling capacitances are *** is found that the transmission peak deviates from the standard Lorentizian with a frequency broadening.

关键词： waveguide Waveguide microwave

Positive direction of polarization-induced electric field improves formic acid electrooxidation on Pd

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Nano Research 2023年第8期16卷 10848-10856页

作者： Shuozhen Hu Yunyun Cheng Guoming Luo Kai Huang Cheng Shi jie Xu Cheng Lian Shigang Sun Xinsheng zhang State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Shanghai Hydrogen Propulsion Technology Co. Ltd.Shanghai 201800China Shanghai Haizhiqing Energy Development Co. Ltd.Shanghai 200333China Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education Functional Materials Research LaboratorySchool of Materials Science and EngineeringTongji UniversityShanghai 201804China School of Materials Science and Engineering Anhui University of TechnologyMa’anshan 243002China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Adjusting the adsorption energy of adsorbates on catalyst can directly regulate the catalytic performance and reaction pathways of heterogeneous ***,we report a novel strategy,introducing polarization-induced electric field(PIEF)with different directions,to manipulate the adsorption energy of intermediates and reaction pathway of formic acid electrooxidation on *** nanoparticles are applied as the PIEF provider,of which the direction is successfully controlled via aligning the dipoles in tourmaline in a strong external electric *** and theoretical results systematically reveal that positive PIEF leads to an electron-deficient state of Pd,reduced adsorption energy of COad,enhanced adsorption energy of*HCOOH and*OH,and promoted formate pathway of formic acid ***/TNP+/FTO,with the aid of positive PIEF,shows three-fold enhancement in the formic acid electrooxidation(4.74 mA·cm^(−2))with high durability and anti-poisoning ability compared with pristine *** study leads a new route to design formic acid electrocatalysts and provides an understanding on how to control the adsorption energy of adsorbates on electrocatalysts by an internal electric field.

关键词： dipole-aligned tourmaline ferroelectric material polarization-induced electric field direction palladium adsorption energy formic acid oxidation mechanism

Effects of the information–knowledge–attitude–practice nursing model combined with predictability intervention on patients with cerebrovascular disease

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World Journal of Clinical Cases 2022年第20期10卷 6803-6810页

作者： Hong-Liang Huo Yuan-Yuan Gui chun-Miao Xu Yan zhang Qiang Li Department of Nursing The Fourth Affiliated Hospital of Qiqihar Medical UniversityQiqihar 161000Heilongjiang ProvinceChina Nursing School Qiqihar Medical UniversityQiqihar 161006Heilongjiang ProvinceChina

BACKGROUND Cerebrovascular disease(CVD)poses a serious threat to human health and ***,developing a reasonable exercise program plays an important role in the long-term recovery and prognosis for patients with *** have shown that predictive nursing can improve the quality of care and that the information–knowledge–attitude–practice(IKAP)nursing model has a positive impact on patients who suffered a *** studies have combined these two nursing models to treat *** To explore the effect of the IKAP nursing model combined with predictive nursing on the Fugl–Meyer motor function(FMA)score,Barthel index score,and disease knowledge mastery rate in patients with *** A total of 140 patients with CVD treated at our hospital between December 2019 and September 2021 were randomly divided into two groups,with 70 patients in *** control group received routine nursing,while the observation group received the IKAP nursing model combined with predictive *** groups were observed for self-care ability,motor function,and disease knowledge mastery rate after one month of *** There was no clear difference between the Barthel index and FMA scores of the two groups before nursing(P>0.05);however,their scores increased after *** increase was more apparent in the observation group,and the difference was statistically significant(P<0.05).The rates of disease knowledge mastery,timely medication,appropriate exercise,and reasonable diet were significantly higher in the observation group than in the control group(P<0.05).The satisfaction rate in the observation group(97.14%)was significantly higher than that in the control group(81.43%;P<0.05).CONCLUSION The IKAP nursing model,combined with predictive nursing,is more effective than routine nursing in the care of patients with CVD,and it can significantly improve the Barthel index and FMA scores with better knowledge acquisition,as well as produce high satisfaction in ***

关键词： Information–knowledge–attitude–practice nursing model Predictive nursing Cerebrovascular disease Barthel index Fugl–Meyer motor function score Disease knowledge mastery rate

Substantial thermoelectric enhancement achieved by manipulating the band structure and dislocations in Ag and La co-doped SnTe

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Journal of Advanced Ceramics 2021年第4期10卷 860-870页

作者： Wenjing XU Zhongwei zhang Chengyan LIU jie GAO Zhenyuan YE chunguang CHEN Ying PENG Xiaobo BAI Lei MIAO Guangxi Key Laboratory of Information Material Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsSchool of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China Department of Materials Science and Engineering SIT Research LaboratoriesInnovative Global ProgramFaculty of EngineeringShibaura Institute of TechnologyTokyo 135-8548Japan

Eco-friendly SnTe based thermoelectric materials are intensively studied recently as candidates to replace PbTe;yet the thermoelectric performance of SnTe is suppressed by its intrinsically high carrier concentration and high thermal *** this work,we confirm that the Ag and La co-doping can be applied to simultaneously enhance the power factor and reduce the thermal conductivity,contributing to a final promotion of figure of *** one hand,the carrier concentration and band offset between valence bands are concurrently reduced,promoting the power factor to a highest value of-2436μW·m^(-1)·K^(-2) at 873 *** the other hand,lots of dislocations(~3.16×10^(7)mm^(-2))associated with impurity precipitates are generated,resulting in the decline of thermal conductivity to a minimum value of 1.87 W·m^(-1)·K^(-1) at 873 *** a result,a substantial thermoelectric performance enhancement up to zT≈1.0 at 873 K is obtained for the sample Sn0.94Ag0.09La0.05Te,which is twice that of the pristine SnTe(zT≈0.49 at 873 K).This strategy of synergistic manipulation of electronic band and microstructures via introducing rare earth elements could be applied to other systems to improve thermoelectric performance.

关键词： SnTe band convergence dislocation Ag and La co-doping thermoelectric performance

Effect of partial replacement of carbon by nitrogen on intergranular corrosion behavior of high nitrogen martensitic stainless steels

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Journal of Materials Science & Technology 2019年第10期35卷 2357-2364页

作者： Wei-Chao Jiao Hua-Bing Li Jing Dai Hao Feng Zhou-Hua Jiang Tao zhang Da-Ke Xu Hong-chun Zhu Shu-Cai zhang School of Metallurgy Northeastern UniversityShenyang 110819China Corrosion and Protection Division Shenyang National Laboratory for Materials ScienceNortheastern UniversityShenyang110819China

The microstructure evolution and intergranular corrosion(IGC) behavior of high nitrogen martensitic stainless steels(MSSs) by partial replacing C by N were investigated by using microscopy, X-ray diffraction, nitric acid tests and double-loop electrochemical potentiokinetic reactivation(DL-EPR) tests. The results show that the partial replacement of C by N first reduces and then increases the size and content of precipitates in high nitrogen MSSs, and converts the dominant precipitates from M23C6 to M2N,furthermore first improves and then deteriorates the IGC resistance. The high nitrogen MSS containing medium C and N contents provides good combination of mechanical properties and IGC resistance.

关键词： High nitrogen martensitic stainless steels Precipitation Intergranular corrosion DL-EPR

Investigation on latch-up susceptibility induced by high-power microwave in complementary metal–oxide–semiconductor inverter

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Chinese Physics B 2017年第2期26卷 492-498页

作者： Yu-Hang zhang Chang-chun Chai Xin-Hai Yu Yin-Tang Yang Yang Liu Qing-Yang Fan chun-Lei Shi Key Laboratory of Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices School of Microelectronics Xidian Universitv. Xi＇an 710071 China

The latch-up effect induced by high-power microwave（HPM） in complementary metal–oxide–semiconductor（CMOS） inverter is investigated in simulation and theory in this paper. The physical mechanisms of excess carrier injection and HPM-induced latch-up are proposed. Analysis on upset characteristic under pulsed wave reveals increasing susceptibility under shorter-width pulsed wave which satisfies experimental data, and the dependence of upset threshold on pulse repetitive frequency（PRF） is believed to be due to the accumulation of excess carriers. Moreover, the trend that HPMinduced latch-up is more likely to happen in shallow-well device is ***, the process of self-recovery which is ever-reported in experiment with its correlation with supply voltage and power level is elaborated, and the conclusions are consistent with reported experimental results.

关键词： high-power microwave latch-up repetitive pulse frequency supply voltage dependence

Preparation, Characterization, and in vitro Release of Biodegradable Erythromycin-gelatin Microspheres

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Chemical Research in Chinese Universities 2008年第2期24卷 196-199页

作者： WANG Fei LIU Pai JIANG Dan LIU Cheng-bai zhang Feng-chun CHEN Xia College of Life Science Jilin University Changchun 130021 P. R. China College of Life Science Beihua University Jilin 132013 P. R. China

Blank and erythromycin-loaded gelatin microspheres were successfully fabricated via emulsion chemical- crosslinking technique. The surface morphology of the microspheres was characterized by scanning electron microscope（SEM） and optical microscope. The results show that the microspheres were spherical and smooth. The particle average size of erythromycin-loaded microspheres was found to be 20.6 μm, with a high purity of more than 90% and with a good dispersibility. The microspheres could be obtained in a high yield. Erythromycin released from the microspheres was monitored in buffer and artificial body fluid at 37 ℃. Average drug content was 27.2%, and erythromycin-loaded gelatin microspheres showed good release profiles with a nearly constant release during 4-8 h in artificial body fluid in vitro degradation studies. These gelatin microspheres are useful for studying and developing various drug-delivery systems.

关键词： In vitro degradation Gelatin Erythromycin Microsphere