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| 1 | Large-area straight,regular periodic surface structures produced on fused silica by the interference of two femtosecond laser beams through cylindrical lens显示文摘Inhomogeneity and low efficiency are two important factors that limit the application of laser-induced periodic surface structures(LIPSSs),especially on glass surfaces.In this study,two-beam interference(TBI)of femtosecond lasers was used to produce large-area straight LIPSSs on fused silica using cylindrical lenses.Compared with those produced us-ing a single circular or cylindrical lens,the LIPSSs produced by TBI are much straighter and more regular.Depending on the laser fluence and scanning velocity,LIPSSs with grating-like or spaced LIPSSs are produced on the fused silica sur-face.Their structural colors are blue,green,and red,and only green and red,respectively.Grating-like LIPSS patterns oriented in different directions are obtained and exhibit bright and vivid colors,indicating potential applications in surface coloring and anti-counterfeiting logos. | Long Chen Kaiqiang Cao Yanli Li Jukun Liu Shian Zhang Donghai Feng Zhenrong Sun Tianqing Jia | 2021 | Opto-Electronic Advances2021，4，12： | 7 |
| 2 | Extremely regular periodic surface structures in a large area efficiently induced on silicon by temporally shaped femtosecond laser显示文摘Femtosecond laser-induced periodic surface structures(LIPSS) have several applications in surface structuring and functionalization. Three major challenges exist in the fabrication of regular and uniform LIPSS: enhancing the periodic energy deposition, reducing the residual heat, and avoiding the deposited debris. Herein, we fabricate an extremely regular low-spatial-frequency LIPSS(LSFL) on a silicon surface by a temporally shaped femtosecond laser. Based on a 4 f configuration zero-dispersion pulse shaping system, a Fourier transform limit(FTL) pulse is shaped into a pulse train with varying intervals in the range of 0.25–16.2 ps using periodic π-phase step modulation. Under the irradiation of the shaped pulse with an interval of 16.2 ps, extremely regular LSFLs are efficiently fabricated on silicon. The scan velocity for fabricating regular LSFL is 2.3 times faster, while the LSFL depth is 2 times deeper, and the diffraction efficiency is 3 times higher than those of LSFL using the FTL pulse.The formation mechanisms of regular LSFL have been studied experimentally and theoretically. The results show that the temporally shaped pulse enhances the excitation of surface plasmon polaritons and the periodic energy deposition while reducing the residual thermal effects and avoiding the deposition of the ejected debris, eventually resulting in regular and deeper LSFL on the silicon surface. | YUCHAN ZHANG QILIN JIANG KAIQIANG CAO TIANQI CHEN KE CHENG SHIAN ZHANG DONGHAI FENG TIANQING JIA ZHENRONG SUN JIANRONG QIU | 2021 | Photonics Research2021，9，5： | 4 |
| 3 | Femtosecond laser-induced periodic structures:mechanisms, techniques, and applications显示文摘Over the past two decades,femtosecond laser-induced periodic structures(femtosecond-LIPSs)have become ubiquitous in a variety of materials,including metals,semiconductors,dielectrics,and polymers.Femtosecond-LIPSs have become a useful laser processing method,with broad prospects in adjusting material properties such as structural color,data storage,light absorption,and luminescence.This review discusses the formation mechanism of LIPSs,specifically the LIPS formation processes based on the pump-probe imaging method.The pulse shaping of a femtosecond laser in terms of the time/frequency,polarization,and spatial distribution is an efficient method for fabricating high-quality LIPSs.Various LIPS applications are also briefly introduced.The last part of this paper discusses the LIPS formation mechanism,as well as the high-efficiency and high-quality processing of LIPSs using shaped ultrafast lasers and their applications. | Yuchan Zhang Qilin Jiang Mingquan Long Ruozhong Han Kaiqiang Cao Shian Zhang Donghai Feng Tianqing Jia Zhenrong Sun Jianrong Qiu Hongxing Xu | 2022 | Opto-Electronic Science2022，1，6： | 3 |
| 4 | Polarizationeffects on interference of three femtosecondlaser beams for fabrication of asymmetric micro/nanopatterns显示文摘 | JIA Xin JIA Tianqing FENG Donghai | 2014 | Indian Journal of physics2014，88，2： | 1 |
| 5 | Information geography: The information revolution reshapes geography显示文摘The information revolution has been one of the driving forces to the innovation in geography. However, environmental remote sensing, geographic information science and technology, and geocomputing, which once resided within the family of geography, are gradually moving close to information science but are alienated from geography. Therefore, it is necessary to reexamine the interactive convergence of geography and information science, and advance the disciplinary system of geographic science to accommodate the researches with information as subjects and methods. In this paper, we propose to reformulate the relationship between geographic science and information science with a new discipline, i.e., information geography, which not only refers to the geography of information but also a methodological system for studying geography using information science.This paper summarizes the background of information geography’s emergence, its definition, and the difference and similarities with other disciplinary concepts. The impact of information geography on geographic paradigm shift is also investigated from the ontological, epistemological, and methodological perspectives. | Xin LI Donghai ZHENG Min FENG Fahu CHEN | 2022 | Science China Earth Sciences2022，65，2： | 1 |
| 6 | Alteration of gut microbiota in type 2 diabetes complicated with cholelithiasis patients显示文摘To the Editor:Type 2 diabetes(T2D)and cholelithiasis are both common diseases with a high,prevalence.In China,the,prevalence of T2D,is.0.90% and that offadult cholelithiasis is 6.83%. | Jiajia Chen Linlin Yan Xingfan Ma Ping Yuan Fan Zhao Zihan Han Jingshan Liu Wenbo Wang Donghai Zhou Hongyu Zhao Nan Feng Dandan Huang Shoukui Hu Jin Gui | 2022 | Chinese Medical Journal2022，135，17： | 1 |
| 7 | ADS Venus-Ⅱ Critical Extrapolation Experiment显示文摘Venus-ⅡADS zero power experiment assembly which is based on the original heavy water zero power reactor has been designed and built in two reactor core structure—A water core and a solid lead core,and the debugging has been completed by the end of December 2016.Then the two core both reached to critical respectively for the first time,and a series of reactor | ZHU Qingfu ZHOU Qi ZHANG Wei LIANG Shuhong LUO Huangda LIU Yang LIU Donghai LIU Feng | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 8 | ADS Venus-Ⅱ Reactivity Value of Spallation Target Measurement Experiment显示文摘The core of the engineering ADS reactor is composed of the spallation target and the metal cooled reactor core.Under the effect of strong external neutron,there is a strong coupling effect between the spallation target and the reactor.According to the development demand of ADS coupling characteristics,we have designed cylindrical targets with different materials on Venus- | ZHOU Qi CHEN Liang LIU Yang MA Fei LIU Feng LIU Donghai | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 9 | ADS Venus-Ⅱ Neutron Spectrum Measurement Experiment显示文摘In order to transmute the minor actinides in nuclear waste,the neutron energy has to be higher.So the fast neutron spectrum area is an important index for the physics design of ADS Venus-Ⅱreactor.The core in the design is divided into three regions from inside to outside,the first is the fast neutron region.To test whether | LIU Feng ZHANG Wei LIU Yang LIU Donghai | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 10 | Periodic transparent nanowires in ITO film fabricated via femtosecond laser direct writing显示文摘This paper reports the fabrication of regular large-area laser-induced periodic surface structures(LIPSSs)in indium tin oxide(ITO)films via femtosecond laser direct writing focused by a cylindrical lens.The regular LIPSSs exhibited good properties as nanowires,with a resistivity almost equal to that of the initial ITO film.By changing the laser fluence,the nanowire resistances could be tuned from 15 to 73 kΩ/mm with a consistency of±10%.Furthermore,the average transmittance of the ITO films with regular LIPSSs in the range of 1200-2000 nm was improved from 21%to 60%.The regular LIPSS is promising for transparent electrodes of nano-optoelectronic devices-particularly in the near-infrared band. | Qilin Jiang Long Chen Jukun Liu Yuchan Zhang Shian Zhang Donghai Feng Tianqing Jia Peng Zhou Qian Wang Zhenrong Sun Hongxing Xu | 2023 | Opto-Electronic Science2023，2，1： | 0 |
| 11 | Plasma functionalized MoSe2 for efficient nonenzymatic sensing of hydrogen peroxide in ultra-wide pH range显示文摘Enzymatic sensors have inherent problems such as the low stability and limited pH range in industrial and biomedical applications and therefore,more efficient nonenzymatic sensors are highly desirable.Herein,plasmafunctionalized defective MoSe_(2)is prepared and studied as a highly efficient catalyst for electrochemical sensing of H_(2)O_(2).Experiments and theoretical computations show that the plasma-induced Se multi-vacancies and nitrogen dopants generate new active sites,expose more edge active surfaces,narrow the bandgap,and strengthen binding with the·OH intermediate,which imparts new fundamental knowledge about the roles of defects in catalysis.The defective MoSe_(2)-catalyzed sensor delivers competitive performance in hydrogen peroxide detection such as a low detection limit of 12.6 nmol/L,wide operational pH range of 1−13,good long-term stability,and high selectivity.The portable sensor produced by screen printing confirms the excellent commercial potential and in addition,the results not only reveal a novel concept to design and fabricate high-performance sensors for H_(2)_(O2)but also provide insights into the effectiveness of surface modification of diverse catalytic materials. | Yang Luo Donghai Wu Zehui Li Xiao‐Yan Li Yinghong Wu Shien‐Ping Feng Carlo Menon Houyang Chen Paul K.Chu | 2022 | SmartMat2022，3，3： | 0 |
| 12 | Crystal structure of the polyketide cyclase from Mycobacterium tuberculosis显示文摘About 40%of proteins are classified as conserved hypothetical proteins in Mycobacterium tuberculosis(TB).Identification and characterization of these proteins are beneficial to understand the pathogenesis of TB and exploiting novel drugs for TB treatments.The polyketide cyclase,a protein from M.tuberculosis(MtPC)has been annotated as a hypothetical protein in Uniprot database.Sequence analysis shows that the MtPC belongs to the NTF2-like superfamily proteins with diverse functions.Here,we determined the crystal structure of MtPC at a resolution of 2.4Åand measured backbone relaxation parameters for the MtPC protein.MtPC exists as a dimer in solution,and each subunit contains a six-stranded mixedβ-sheet and threeαhelixes which are arranged in the orderα1-α2-β1-β2-α3-β3-β4-β5-β6.The NMR dynamics analysis showed that the overall structure of MtPC is highly rigid on ps-ns time scales.Furthermore,we predicted the potential function of MtPC based on the crystal structure.Our results lay the basis for further exploiting and mechanistically understanding the biological functions of MtPC. | Jie Zhuang Shihui Fan Chenyun Guo Liubin Feng Huilin Wang Donghai Lin Xinli Liao | 2022 | Acta Biochimica et Biophysica Sinica2022，54，4： | 0 |
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