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| 1 | Characteristics of atmospheric single particles during haze periods in a typical urban area of Beijing:A case study in October,2014显示文摘To investigate the composition and possible sources of particles, especially during heavy haze pollution, a single particle aerosol mass spectrometer(SPAMS) was deployed to measure the changes of single particle species and sizes during October of 2014, in Beijing. A total of 2,871,431 particles with both positive and negative spectra were collected and characterized in combination with the adaptive resonance theory neural network algorithm(ART-2a). Eight types of particles were classified: dust particles(dust, 8.1%), elemental carbon(EC, 29.0%), organic carbon(OC, 18.0%), EC and OC combined particles(ECOC, 9.5%),Na-K containing particles(Na K, 7.9%), K-containing particles(K, 21.8%), organic nitrogen and potassium containing particles(KCN, 2.3%), and metal-containing particles(metal,3.6%). Three haze pollution events(P1, P2, P3) and one clean period(clean) were analyzed,based on the mass and number concentration of PM_(2.5)and the back trajectory results from the hybrid single particle Lagrangian integrated trajectory model(Hysplit-4 model). Results showed that EC, OC and K were the major components of single particles during the three haze pollution periods, which showed clearly increased ratios compared with those in the clean period. Results from the mixing state of secondary species of different types of particles showed that sulfate and nitrate were more readily mixed with carbon-containing particles during haze pollution episodes than in clean periods. | Lang Liu Yanli Wang Shiyong Du Wenjie Zhang Lujian Hou Sverre Vedal Bin Han Wen Yang Mindong Chen Zhipeng Bai | 2016 | Journal of Environmental Sciences2016，28，2： | 19 |
| 2 | Molecular diversity of arbuscular mycorrhizal fungi at a large-scale antimony mining area in southern China显示文摘Arbuscular mycorrhizal fungi(AMF) have great potential for assisting heavy metal hyperaccumulators in the remediation of contaminated soils. However, little information is available about the community composition of AMF under natural conditions in soils contaminated by antimony(Sb). The objective of this study was to investigate the characteristics of AMF molecular diversity, and to explore the effects of Sb content and soil properties on the AMF community structure in an Sb mining area. Four Sb mine spoils and one adjacent reference area were selected from around the Xikuangshan mine in southern China. The association of AMF molecular diversity and community composition with the rhizosphere soils of the dominant plant species was studied by Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis(PCR-DGGE). Results from all five studied sites showed that the diversity of AMF decreased with increasing Sb concentration. Principal component analysis(PCA) indicated that the AMF community structure was markedly different among these groups. Further redundancy analysis(RDA) showed that Sb contamination was the dominating factor influencing the AMF community structure in the Sb mine area. However, the multivariate analysis showed that, apart from the soil Sb content, extractable nitrogen content and organic matter content also attributed to AMF sequence distribution type. Some AMF sequences were only found in the highly contaminated area and these might be ideal candidates for improving phytoremediation efficiency in Sb mining regions. Gene sequencing analysis revealed that most species were affiliated with Glomus, suggesting that Glomus was the dominant AMF genus in the studied Sb mining area. | Yuan Wei Zhipeng Chen Fengchang Wu Hong Hou Jining Li Yuxian Shangguan Juan Zhang Fasheng Li Qingru Zeng | 2015 | Journal of Environmental Sciences2015，27，3： | 6 |
| 3 | A comparative study of hydrothermal aging effect on cerium and lanthanum doped Cu/SSZ-13 catalysts for NH_(3)-SCR显示文摘Ce-or La-doped Cu/SSZ-13 catalysts were prepared by a hydrothermal method and Cu,Ce or La ions were incorporated through stepwise ion exchange,The catalyst activity was measured for the ammonia selective catalytic reduction reaction.The structure and composition of catalyst were characterized by using X-ray diffraction,scanning electron microscopy,inductively coupled plasma mass spectrometry solid-state NMR,NH_(3)-TPD techniques,and the active components were examined by XPS and XANES.The results indicate that the Ce and La doping can both completely preserve the SCR activity of Cu/SSZ-13 above 300℃,but there is also a decrease of activity below 200℃.On the other hand,Ce doping is beneficial to the formation of framework aluminum,stabilizes molecular sieve framework and Cu active sites of Cu/SSZ-13,thereby improves the catalyst hydrothermal stability.But La doping will decrease the amount of framework aluminum and Cu active sites of Cu/SSZ-13 after hydrothermally aging,even destroy zeolite CHA structure.This is quite harmful to the catalyst hydrothermal stability. | Di Deng Shujun Deng Dandan He Zhiheng Wang Zhipeng Chen Yi Ji Guoping Yan Guangjin Hou Licheng Liu Hong He | 2021 | Journal of Rare Earths2021，39，8： | 5 |
| 4 | Topological domain states and magnetoelectric properties in multiferroic nanostructures显示文摘Multiferroic nanostructures have been attracting tremendous attention over the past decade, due to their rich cross-coupling effects and prospective electronic applications. In particular, the emergence of some exotic phenomena in size-confined multiferroic systems, including topological domain states such as vortices, center domains, and skyrmion bubble domains, has opened a new avenue to a number of intriguing physical properties and functionalities, and thus underpins a wide range of applications in future nanoelectronic devices. It is also highly appreciated that nano-domain engineering provides a pathway to control the magnetoelectric properties, which is promising for future energy-efficient spintronic devices. In recent years, this field, still in its infancy, has witnessed a rapid development and a number of challenges too.In this article, we shall review the recent advances in the emergent domain-related exotic phenomena in multiferroic nanostructures. Specific attention is paid to the topological domain structures and related novel physical behaviors as well as the electric-field-driven magnetic switching via domain engineering. This review will end with a discussion of future challenges and potential directions. | Guo Tian Wenda Yang Deyang Chen Zhen Fan Zhipeng Hou Marin Alexe Xingsen Gao | 2019 | National Science Review2019，6，4： | 4 |
| 5 | Modes of genetic adaptations underlying functional innovations in the rumen显示文摘The rumen is the hallmark organ of ruminants and hosts a diverse ecosystem of microorganisms that facilitates efficient digestion of plant fibers.We analyzed 897 transcriptomes from three Cetartiodactyla lineages:ruminants,camels and cetaceans,as well as data from ruminant comparative genomics and functional assays to explore the genetic basis of rumen functional innovations.We identified genes with relatively high expression in the rumen,of which many appeared to be recruited from other tissues.These genes show functional enrichment in ketone body metabolism,regulation of microbial community,and epithelium absorption,which are the most prominent biological processes involved in rumen innovations.Several modes of genetic change underlying rumen functional innovations were uncovered,including coding mutations,genes newly evolved,and changes of regulatory elements.We validated that the key ketogenesis rate-limiting gene(HMGCS2)with five ruminant-specific mutations was under positive selection and exhibits higher synthesis activity than those of other mammals.Two newly evolved genes(LYZ1 and DEFB1)are resistant to Gram-positive bacteria and thereby may regulate microbial community equilibrium.Furthermore,we confirmed that the changes of regulatory elements accounted for the majority of rumen gene recruitment.These results greatly improve our understanding of rumen evolution and organ evo-devo in general. | Xiangyu Pan Yudong Cai Zongjun Li Xianqing Chen Rasmus Heller Nini Wang Yu Wang Chen Zhao Yong Wang Han Xu Songhai Li Ming Li Cunyuan Li Shengwei Hu Hui Li Kun Wang Lei Chen Bin Wei Zhuqing Zheng Weiwei Fu Yue Yang Tingting Zhang Zhuoting Hou Yueyang Yan Xiaoyang Lv Wei Sun Xinyu Li Shisheng Huang Lixiang Liu Shengyong Mao Wenqing Liu Jinlian Hua Zhipeng Li Guojie Zhang Yulin Chen Xihong Wang Qiang Qiu Brian PDalrymple Wen Wang Yu Jiang | 2021 | Science China(Life Sciences)2021，64，1： | 3 |
| 6 | Nucleation kinetics of paramagnetic and diamagnetic metal melts under a high magnetic field显示文摘The influence of a high magnetic field(HMF)on the nucleation kinetics of paramagnetic aluminum and diamagnetic zinc melts has been investigated by differential thermal analysis(DTA).It is found that the application of an HMF increases the undercooling of pure aluminum and pure zinc at the same heatingcooling rates.Moreover,the quantitative analysis of activation energy calculated from the DTA results using the Kissinger method manifests that the HMF reduces the activation energy of pure aluminum and pure zinc.Regardless of magnetism,the nucleation frequency under an HMF is higher than that without an HMF.Furthermore,the increase in undercooling under the HMF is mainly attributed to the increase of the contact angle,calculated by the functional relationship between the cooling rate and undercooling.This result is consistent with the increase of the calculated nucleation work for pure aluminum and pure zinc.Additionally,the increase in undercooling caused by the HMF is partly ascribed to the magnetic field-induced suppression of thermal convection in the undercooled melt. | Zhipeng Long Qiuyue Jiang Jiantao Wang Long Hou Xing Yu Yves Fautrelle Zhongming Ren Xi Li | 2021 | Journal of Materials Science & Technology2021，，14： | 2 |
| 7 | Over 50,000 Metagenomically Assembled Draft Genomes for the Human Oral Microbiome Reveal New Taxa显示文摘The oral cavity of each person is home to hundreds of bacterial species.While taxa for oral diseases have been studied using culture-based characterization as well as amplicon sequencing,metagenomic and genomic information remains scarce compared to the fecal microbiome.Here,using metagenomic shotgun data for 3346 oral metagenomic samples together with 808 published samples,we obtain 56,213 metagenome-assembled genomes(MAGs),and more than 64%of the 3589 species-level genome bins(SGBs)contain no publicly available genomes.The resulting genome collection is representative of samples around the world and contains many genomes from candidate phyla radiation(CPR)that lack monoculture.Also,it enables the discovery of new taxa such as a genus Candidatus Bgiplasma within the family Acholeplasmataceae.Large-scale metagenomic data from massive samples also allow the assembly of strains from important oral taxa such as Porphyromonas and Neisseria.The oral microbes encode genes that could potentially metabolize drugs.Apart from these findings,a strongly male-enriched Campylobacter species was identified.Oral samples would be more user-friendly collected than fecal samples and have the potential for disease diagnosis.Thus,these data lay down a genomic framework for future inquiries of the human oral microbiome. | Jie Zhu Liu Tian Peishan Chen Mo Han Liju Song Xin Tong Xiaohuan Sun Fangming Yang Zhipeng Lin Xing Liu Chuan Liu Xiaohan Wang Yuxiang Lin Kaiye Cai Yong Hou Xun Xu Huanming Yang Jian Wang Karsten Kristiansen Liang Xiao Tao Zhang Huijue Jia Zhuye Jie | 2022 | Genomics, Proteomics & Bioinformatics2022，20，2： | 1 |
| 8 | Activated carbon prepared from waste tire pyrolysis carbon black via CO_(2)/KOH activation used as supercapacitor electrode显示文摘As the quantity of waste tires increases,more pyrolysis carbon black(CBp),a type of low value-added carbon black,is being produced.However,the application of CBp has been limited.Therefore,it is necessary to identify and expand applications of CBp.This work focuses on the preparation of activated carbon(AC)from CBp using the physicochemical activation of carbon dioxide(CO_(2))and potassium hydroxide(KOH).Thereafter,AC is applied to the electrode of the electrical double-layer capacitor(EDLC).The AC prepared by CO_(2)/KOH activation exhibited a hierarchical pore structure.The specific surface area increased from 415 to 733 m^(2)g^(−1),and in combination with low ash content of 1.51%,ensured abundant ion diffusion channels and active sites to store charge.The EDLC comprising the AC(AC-2)electrode prepared by excitation of CO_(2)(300 sccm)and KOH had a reasonable gravimetric specific capacitance of 192 F g^(−1)at 0.5 A g^(−1),and exhibited a good rate capability of 73%at 50 A g^(−1)in a three-electrode system.Moreover,the EDLC device comprising the AC-2 electrode delivered excellent cycling stability(capacitance retention of 106%after 10000 cycles at 2 A g^(−1)in a two-electrode system).Furthermore,a symmetric supercapacitor based on an AC electrode that exhibits a supreme energy density of 4.7 Wh kg^(−1)and a maximum power density of 6362.6 W kg^(−1)is demonstrated. | HOU ShengPing ZHANG Da XIE ZhiPeng KANG Yao TANG ZhengGang DAI YongNian LEI Yong CHEN Jian LIANG Feng | 2022 | Science China(Technological Sciences)2022，65，10： | 1 |
| 9 | Integrated purification of gadolinium and preparation of Gd2O_(3) nanoparticles by DC arc plasma显示文摘The rare-earth metal Gd plays an important role in the energy,information,and national defence fields due to its special optical,electrical,magnetic,and catalytic properties.In this study,Gd was purified by direct current(DC)arc plasma,and Gd2O_(3) nanoparticles were prepared via an integration method using purified Gd.The effects of arc current,melting time,gas pressure,and atmosphere on the purification of Gd by DC arc plasma were investigated.With an increase in the arc current and melting time,the rate of removal of impurities from Gd enhances.Moreover,Gd melting was conducted by H_(2)-Ar arc plasma,which improves the impurity removal rate by increasing the H_(2) content.High thermal conductivity and chemical activity of the activated H atoms generated by the dissociation of H_(2) are the main reasons for the significant improvement in the impurity removal rate.The mechanism of Gd purification was analysed based on the above-mentioned experimental results.The as-synthesised Gd2 O_(3) nanoparticles have a uniform spherical structure(average diameter of 32.7 nm),appropriate dispersibility,and high purity.This study provides a new strategy for the integrated purification of metals and preparation of metal/metal-based nanomaterials by DC arc plasma. | Zhenggang Tang Minjie Hou Xin He Kai Ye Da Zhang Zhipeng Xie Yongnian Dai Feng Liang | 2021 | Journal of Rare Earths2021，39，12： | 1 |
| 10 | Perovskite/GaAs-nanowire hybrid structure photodetectors with ultrafast multiband response enhancement by band engineering显示文摘We developed a hybrid structure photodetector combining one-dimensional(1D)inorganic GaAs nanowires and two-dimensional(2D)organic perovskite materials,which can achieve various performance enhancements using a relatively simple structure.Via the optical absorption enhancement of perovskite and the type-II energy band structure formed by the heterostructure,the responsivity and detectivity of the photodetector from ultraviolet(UV)to visible(Vis)wavelengths are significantly enhanced,reaching 75 A/W and 1.49×10^(11)Jones,respectively.The response time of the photodetector was significantly decreased by 3 orders,from 785 ms to 0.5 ms,and the dark current was further reduced to 237 fA.A photodetector was prepared with enhanced responsivity and ultrafast response time in the multiband region from the UV to Vis wavelength.To the best of our knowledge,this is the first time to combine inorganicⅢ-ⅤGaAs nanomaterials with organic perovskite materials,which verifies the effective combination of inorganic and organic materials in a mixed dimension.The excellent photoelectric performance of the perovskite/GaAs-nanowire hybrid structure photodetector makes it a potential candidate material for a wide range of photoelectric applications such as multiband photodetection. | XIAOBING HOU XITONG HONG FENGYUAN LIN JINZHI CUI QIAN DAI QIANLEI TIAN BINGHENG MENG YANJUN LIU JILONG TANG KEXUE LI LEI LIAO ZHIPENG WEI | 2023 | Photonics Research2023，11，4： | 0 |
| 11 | Fast electrochemical activation of the broadband saturable absorption of tungsten oxide nanoporous film显示文摘The on-demand modulation of defects in materials for the effective modulation of optical nonlinearity is desirable,while it remains a great challenge.In this work,we demonstrate that electrochemical activation is a facile and convenient approach to modulating the broadband third-order nonlinear absorption of nanoporous tungsten oxide(WO3-x)thin film.The film does not exhibit optical nonlinearity at the initial state,while shows a distinct saturable absorption under an applied voltage of-2.5 V with the excitation of 515,800,and 1,030 nm laser.The nonlinear absorption coefficient(β_(eff))is-766.38±6.67 cm·GW^(-1) for 1,030 nm laser,-624.24±17.15 cm·GW-1 for 800 nm laser,and-120.70±11.49 cm·GW^(-1) for 515 nm laser,and the performance is competitive among inorganic saturable absorbers.The activation is accomplished in 2 min.The performance enhancement is ascribed to the formation of abundant in-gap defect states because of the reduction of the tungsten atoms,and a Pauli-blocking effect occurs during the excitation of in-gap defect states.The small feature size of WO_(3-x)(-12 nm)enables the effective and fast introduction and removal of the defects in porous film,and accordingly the fast and broadband modulation of optical nonlinearity.Our results suggest a controllable,effective,and convenient approach to tuning the nonlinear absorption of materials. | Ruipeng Hou Hui Li Mengjuan Diao Yanhui Sun Ying Liang Zhiyang Yu Zhipeng Huang Chi Zhang | 2022 | Nano Research2022，15，1： | 0 |
| 12 | Boosted lithium storage performance by local build-in electric field derived by oxygen vacancies in 3D holey N-doped carbon structure decorated with molybdenum dioxide显示文摘Three-dimensional holey nitrogen-doped carbon matrixes decorated with molybdenum dioxide(MoO_(2))nanoparticles have been successfully synthesized via a NaCl-assisted template strategy.The obtained MoO_(2)/C composites offered multi-advantages,including higher specific surface area,more active sites,more ions/electrons transmission channels,and shorter transmission path due to the synergistic effect of the uniformly distributed MoO_(2) nanoparticles and porous carbon structure.Especially,the oxygen vacancies were introduced into the prepared composites and enhanced the Li^(+)intercalation/deintercalation process during electrochemical cycling by the Coulomb force.The existence of the local built-in electric field was proved by experimental data,differential charge density distribution,and density of states calculation.The uniquely designed structure and introduced oxygen vacancy defects endowed the MoO_(2)/C composites with excellent electrochemical properties.In view of the synergistic effect of the uniquely designed morphology and introduced oxygen vacancy defects,the MoO_(2)/C composites exhibited superior electrochemical performance of a high capacity of 918.2 mAh g^(-1) at 0.1 A g^(-1) after 130 cycles,562.1 mAh g^(-1) at 1.0 A g^(-1) after 1000 cycles,and a capacity of 181.25 mAh g^(-1) even at 20.0 A g^(-1).This strategy highlights the path to promote the commercial application of MoO_(2)-based and other transition metal oxide electrodes for energy storage devices. | Chuanxin Hou Wenyue Yang Hideo Kimura Xiubo Xie Xiaoyu Zhang Xueqin Sun Zhipeng Yu Xiaoyang Yang Yuping Zhang Bin Wang Ben Bin Xu Deepak Sridhar Hassan Algadi Zhanhu Guo Wei Du | 2023 | Journal of Materials Science & Technology2023，，11： | 0 |
| 13 | Experimental search for high-performance ferroelectric tunnel junctions guided by machine learning显示文摘Ferroelectric tunnel junction(FTJ)has attracted considerable attention for its potential applications in nonvolatile memory and neuromorphic computing.However,the experimental exploration of FTJs with high ON/OFF ratios is a challenging task due to the vast search space comprising of ferroelectric and electrode materials,fabrication methods and conditions and so on.Here,machine learning(ML)is demonstrated to be an effective tool to guide the experimental search of FTJs with high ON/OFF ratios.A dataset consisting of 152 FTJ samples with nine features and one target attribute(i.e.,ON/OFF ratio)is established for ML modeling.Among various ML models,the gradient boosting classification model achieves the highest prediction accuracy.Combining the feature importance analysis based on this model with the association rule mining,it is extracted that the utilizations of{graphene/graphite(Gra)(top),LaNiO_(3)(LNO)(bottom)}and{Gra(top),Ca_(0.96)Ce_(0.04)MnO_(3)(CCMO)(bottom)}electrode pairs are likely to result in high ON/OFF ratios in FTJs.Moreover,two previously unexplored FTJs:Gra/BaTiO_(3)(BTO)/LNO and Gra/BTO/CCMO,are predicted to achieve ON/OFF ratios higher than 1000.Guided by the ML predictions,the Gra/BTO/LNO and Gra/BTO/CCMO FTJs are experimentally fabricated,which unsurprisingly exhibit≥1000 ON/OFF ratios(~8540 and~7890,respectively).This study demonstrates a new paradigm of developing high-performance FTJs by using ML. | Jingjing Rao Zhen Fan Qicheng Huang Yongjian Luo Xingmin Zhang Haizhong Guo Xiaobing Yan Guo Tian Deyang Chen Zhipeng Hou Minghui Qin Min Zeng Xubing Lu Guofu Zhou Xingsen Gao Jun-Ming Liu | 2022 | Journal of Advanced Dielectrics2022，12，3： | 0 |
| 14 | Controlled manipulation of conductive ferroelectric domain walls and nanoscale domains in BiFeO_(3) thin films显示文摘Recently,there is a surge of research interest in configurable ferroelectric conductive domain walls which have been considered as possible fundamental building blocks for future electronic devices.In this work,by using piezoresponse force microscopy and conductive atomic force microscopy,we demonstrated the controlled manipulation of various conductive domain walls in epitaxial BiFeO_(3) thin films,e.g.neutral domain walls(NDW)and charged domain walls(CDWs).More interestingly,a specific type of nanoscale domains was also identified,which are surrounded by highly conductive circular CWDs.Similar nano-scale domains can also be controlled created and erasured by applying local field via conductive probe,which allow nondestructive current readout of different domain states with a large on/off resistance ratio up to 102.The results indicate the potential to design and develop high-density non-volatile ferroelectric memories by utilizing these programable conductive nanoscale domain walls. | Dongfeng Zheng Guo Tian Yadong Wang Wenda Yang Luyong Zhang Zoufei Chen Zhen Fan Deyang Chen Zhipeng Hou Xingsen Gao Qiliang Li Jun-Ming Liu | 2022 | Journal of Materiomics2022，8，2： | 0 |
| 15 | Patterning of large area nanoscale domains in as-grown epitaxial ferroelectric PbTiO_(3)films显示文摘Effective tuning of nanoscale domain structures provides fundamental basis for controlling and engineering of various functionalities in ferroelectric materials.In this work,we demonstrate the precise patterning of nanoscopic domain structures in as-grown epitaxial PbTiO_(3)(PTO)films by merely introducing an ultrathin pre-patterned doping layer(e.g.,Fe-doped PTO).The doping layer can effectively reverse the interfacial built-in bias,consequent to a reversed initial polarization reorientation in the as-grown film,which makes it possible to transfer the nano-patterns in the doping layer into the domain structure of ferroelectric films.For instance,we have successfully fabricated large area ordered array of nanoscale cylindrical domains(downward polarization)embedded in the matrix domain with opposite polarization(upward polarization)in PTO film.These nanoscale cylinder domains also allow deterministic and reversible erasure and creation induced by biased tip scanning.The results provide an effective pathway for on-demand patterning of large area nanoscale domains in the as-grown films,which may find applications in a wide range of nanoelectronic devices. | Luyong Zhang Guo Tian Wenda Yang Dongfeng Zheng Chuanjie Lin Jianbiao Xian Yihang Guo Xingchen Zhang Xiuqin Qiu Lanping Zhang Zhen Fan Deyang Chen Zhipeng Hou Minghui Qin Jun-Ming Liu Xingsen Gao | 2023 | Journal of Materiomics2023，9，1： | 0 |
| 16 | Unlocking the charge doping effect in softly intercalated ultrathin ferromagnetic superlattice显示文摘The electrolyte-assisted exfoliation strategy is widely employed to synthesize ultrathin two-dimensional(2D)materials.Yet,spins in 2D magnets are susceptible to the electrolyte due to the underlying charge doping effect.Hence,it is crucial to understand and trace the doping process during the delamination of 2D magnets.Taking the prototype Fe_(3)GeTe_(2),we utilized soft organic cations to exfoliate the bulk and obtain a freestanding organ-ic–inorganic hybrid superlattice with a giant electron doping effect as high as 6.9×10^(14)/cm^(2)(~1.15 electrons per formula unit).A remarkable ferromagnetic transition exceeding 385 K was revealed in these superlattices,together with unique anisotropic saturation magnetization.The doping enhanced the in-plane electron–phonon coupling and thus optimized originally poor indirect double-exchange scenario for spin electrons.The emerging vertical magnetization shift phenomenon served to evaluate the uniformity of charge doping.The above findings provide a new perspective for understanding the role of parasitic charge in 2D magnetism. | Liang Hu Bingzhang Yang Zhipeng Hou Yangfan Lu Weitao Su Lingwei Li | 2023 | eScience2023，3，3： | 0 |
| 17 | Biodegradable implants based on photo-cross-linked aliphatic polycarbonates for long-acting contraception显示文摘In this study,a new class of biodegradable contraceptive implants was prepared via the UV irradiation molding method,among which,progestin levonorgestrel(LNG)was used as a model drug.Photo-cross-linked aliphatic polycarbonates(APCs),namely,poly(trimethylene carbonate-co-2,2′-dimethyltrimethylene carbonate)[P(TMC-co-DTC)]elastomers,were used as the drug delivery matrix.The results obtained from the degradation experiments carried out in Sprague-Dawley(SD)rats showed that the cross-linked elastomer had the degradation characteristics of the surface erosion degradation mechanism,with no generation of acid degradation products,and excellent form-stability,which met the performance requirements of the matrix for a long-acting sustained-release delivery system.The in vitro cytotoxicity tests and histological and immunohistochemical evaluations showed good biocompatibility and biosafety of the elastomer matrix material and contraceptive implants.Subsequently,the implant formulations were screened by in vitro release experiments,and their release kinetics were explored.Finally,in the evaluation study of the in vivo anti-fertility effect,the implants exhibited excellent dimensional stability and were degraded by a surface erosion mechanism.LNG achieved a stable and sustained release in female SD rats,maintaining a long-acting contraceptive duration of up to 4 months.The contraceptive implants obtained in this study could be used to address the limitations of currently available formulations,which required secondary surgical removal and a single means of regulating drug release kinetics.Therefore,these implants could provide a new option for birth control needs and may be of significance in reducing the incidence of induced abortion and protecting female fertility. | Zhipeng Hou Wei Xu Siwen Chen Jing Guo Peng Li Jianshe Hu Liqun Yang Jing Chen | 2023 | Journal of Materials Science & Technology2023，，25： | 0 |
| 18 | Effects of a high magnetic field on single-phase interface evolution,additional interfacial energy and nucleation undercooling in Al-based alloy显示文摘The effects of a high magnetic field on the evolution of the single-phase interface and the liquid-solid interface energy in Al-Cu alloy were investigated experimentally.It is found that the application of the magnetic field has a significant promotion effect on the migration of liquid droplets,accelerating the formation of the single-phase interface.This should be attributed to the thermoelectric(TE)magnetic convection in the droplets which has enhanced the diffusion and increased the migration speed of liquid droplets.Further,the effect of the high magnetic field on the solid-liquid interface energy is analyzed by an improved grain boundary groove(GBG)method.The average solid-liquid interface energy of theα-Al/Al-Cu and Al2Cu/Al-Cu systems increases and decreases with the increase of the magnetic field,respectively.The above experiment results are well explained based on the formation and interaction of the magnetic dipole at the solid-liquid interface.Moreover,experimental results reveal that the magnetic-field-induced interface energy increases and decreases the nucleation undercooling of the Al-30wt.%Cu alloy and Al-35wt.%Cu alloy,respectively.By studying the effect of the magnetic-field-induced interface energy on the nucleation undercooling,the understanding of the interface energy-induced nucleation undercooling deepens. | Lin Wang Zhipeng Long Long Hou Song Yan Baode Sun Xi Li | 2023 | Journal of Materials Science & Technology2023，，23： | 0 |
| 19 | Creation and erasure of polar bubble domains in PbTiO_(3)films by mechanical stress and light illuminations显示文摘The controllable manipulation of polar topological structures(e.g.skyrmion bubble)in ferroelectric materials have been considered as a cornerstone for future programmable nano-electronics.Here,we present the effective creation and erasure of polar bubble states PbTiO_(3)(PTO)multilayers trigged by mechanical stress and light illumination,respectively.It was found that applying atomic force microscope(AFM)tip force can induced formation of nanoscale bubble domains from the initial monodomain state.Moreover,the created bubble domain can be eliminated by exposure to ultraviolet or infrared light illumination.The above results can be understood by modulation of depolarization screening charges and bias fields,as reflected by scanning Kelvin potential microscopic(SKPM)observations,whereby the flexoelectric effect from the tip force tends to remove the screening charges on top surface and modulate the bias field that favors the formation of bubble state while light illumination tends to recover the screen charges and favor the monodomain state.The results provide a good example for multi-field manipulation of polar topologies,which might create a new avenue towards the immerging new concept electronic devices. | Xingchen Zhang Hongying Chen Guo Tian Wenda Yang Zhen Fan Zhipeng Hou Deyang Chen Min Zeng Minghui Qin Jinwei Gao Xingsen Gao Jun-Ming Liu | 2023 | Journal of Materiomics2023，9，4： | 0 |
| 20 | Association of branched-chain amino acid intake trajectory in adulthood with the risk of type 2 diabetes and its related risk factors显示文摘To the Editor:Type 2 diabetes(T2D)showed increasing prevalence worldwide and put a huge burden on healthcare systems.[1]Branched-chain amino acids(BCAAs,including Leucine,Isoleucine,and Valine),a prominent group of essential amino acids,are important nutrition signals that have important effects on protein synthesis,glucose homeostasis,and nutrient-sensitive signaling pathways.Plasma BCAA can predict the development of T2D,whereas the studies of dietary BCAA on T2D risk showed conflicting results.[2]Most of the researches about dietary BCAAs used a single or limited number of measurements,ignoring the dynamic changes of dietary BCAA levels throughout life and their relevance to the development of diabetes.A life-course approach using multiple dietary BCAA measurements over time may shed new light on dietary BCAA trajectories and their relation to T2D risk.Therefore,in the current study,we first use latent class mixed model(LCMM)to characterize BCAA intake trajectories over 18 years in longitudinal data from China and investigate the association of BCAA intake trajectories with the risk of T2D and its biomarkers after adjusting for potential confounding factors. | Weiqi Wang Tianshu Han Wanying Hou Xiyun Ren Wei Duan Zhipeng Liu Changhao Sun | 2022 | Chinese Medical Journal2022，，1： | 0 |
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