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PHOTOSWITCHABLE NANOFLUOROPHORES FOR INNOVATIVE BIOIMAGING

journal of Innovative Optical Health Sciences 2011年第4期4卷 395-408页

作者： MING-qIANG zhu GUO-FENG ZHANG CHONG LI YA-jING LI MATTHEW PALDRED ALEXANDER D.q.LI Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China Department of Chemistry Washington State University PullmanWA 99164USA

Photosensitive fluorescent probes have become powerful tools in chemical biology and molecular biophysics,which are used to investigate cellular processes with high temporal and spatial ***,photosensitive fluorescent probes,including photoactivatable,photoconvertible,and photoswitchable fluorophores,have been extensively developed during the past *** photoswitchable fluorophores have received much attention because they highlight cellular events *** minireview summarizes recent advances of using reversibly photoswitchable fluorophores and their applications in innovative *** fluorophores include photoswitchable fluorescent proteins,photoswitchable fluorescent organic molecules(dyes),and photoswitchable fluorescent *** strategies have been developed to synthesize photoswitchable fluorophores,including engineering combination proteins,chemical synthesis,polymerization,and *** we concentrate on polymer nanoparticles with optically switchable emission properties:either fluorescence on/offor dualalternating-color fluorescence *** essential mechanisms of fluorescence photoswitching enable different types of photoswitchable fluorophores to change emission intensity or wavelength(color)and thus validating the basis of the fluorescence on/offor dual-color photoswitching *** the possible applications of any fluorophores are to label biological targets,followed by specific *** newly developed photoswitchable fluorophores enable super-resolution fluorescence imaging because of their photosensitive ***,we summarize the important area regarding future research and development on photoswitchable fluorescent nanoparticles.

关键词： Fluorescent molecular switches polymer nanoparticles two-photon two-photon imaging spiropyran

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Synthesis of Single-Crystal TiO_2 Nanowire Using Titanium Monoxide Powder by Thermal Evaporation

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journal of Materials Science & Technology 2012年第5期28卷 385-390页

作者： Z.G.Shang Z.q.Liu P.j.Shang j.K.Shang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

TiO 2 nanowires were synthesized successfully in a large quantity by thermal evaporation using titanium monoxide powder as precursor. X-ray diffraction results showed that all the products were pure rutile phase of TiO 2 . According to microstructural observations, the nanowires have two typical morphologies, a long straight type and a short tortuous type. The straight nanowires were obtained at a wide temperature range of 900–1050 ℃, while the tortuous ones were formed below 900 ℃. Transmission electron microscopy characterization revealed that both the straight and the tortuous nanowires are single-crystal rutile TiO 2 . The preferential growth direction of the nanowires was determined as [110] orientation according to electron diffraction and high-resolution image analyses. The morphological change of TiO 2 nanowires was discussed by considering the different atomic diffusion rates of Ti atoms caused by the phase transformation in Ti substrate at around 900 ℃.

关键词： Rutile-TiO 2 Alloy nanowires Transmission electron microscopy (TEM) characterization Crystal structure identification Growth mechanism Thermal evaporation

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Self-induced birefringence of white-light continuum generated by interaction of focused femtosecond laser pulses with fused silica

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High Power Laser Science and Engineering 2020年第2期8卷 71-76页

作者： j.qian G.D.Wang K.Y.Lou D.Y.Shen q.Fu q.Z.Zhao State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

White-light continuum can be induced by the interaction of intense femtosecond laser pulses with condensed *** using two orthogonal polarizers,a self-induced birefringence of continuum is observed when focusing femtosecond laser pulses into bulk fused *** is,the generated white-light continuum is synchronously modulated anisotropically while propagating in fused ***-resolved detection confirms that self-induced birefringence of continuum shows a growth and saturation feature with time *** adjusting laser energy,the transmitted intensity of continuum modulated by self-induced birefringence also varies *** analysis with time evolution indicates that it is the focused femtosecond laser pulses that induce anisotropic microstructures in bulk fused silica,and the anisotropic structures at the same time modulate the generated continuum.

关键词： femtosecond laser pulses fused silica self-induced birefringence white-light continuum

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智能传感技术在水肥一体系统中的应用研究

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农机化研究 2025年第2期47卷 176-180页

作者：祝鹏郭艳光内蒙古农业大学职业技术学院内蒙古包头014109

以进一步提升水肥一体机系统的作业效率为目标,选取智能传感的监测技术,针对整机的监测控制与信号处理展开应用设计研究。考虑水肥一体机过程作业肥液融合的均匀性及系统各模块之间的协同性功能实现,结合微分补偿的传感数据算法处理方法... 详细信息

以进一步提升水肥一体机系统的作业效率为目标,选取智能传感的监测技术,针对整机的监测控制与信号处理展开应用设计研究。考虑水肥一体机过程作业肥液融合的均匀性及系统各模块之间的协同性功能实现,结合微分补偿的传感数据算法处理方法,进行智能传感的水肥一体机架构布局,并匹配可执行的软件控制程序及硬件实施结构,进行实地传感应用监测与灌施控制作业试验。结果表明:水肥一体机系统的数据监测准确率可达95.25%,系统故障率相对降低3.79%,监测数据准确及时,能够确保系统各环节指令得到有效的调整与反馈,进而保证灌施土壤的含水稳定率相对提升7.87%,对于作物的稳定生长与产量提升有重要的参考价值。

关键词：水肥一体机智能传感信号处理微分补偿数据监测准确率

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ELECTROCHEMICAL NOISE ANALYSIS OF THE INFLUENCE OF THE Zn^(2+)IONS CONCENTRATION ON ZINC ELECTROPLATING

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Acta Metallurgica Sinica(English Letters) 2005年第2期18卷 137-144页

作者： Z.Zhang C.S.Wu q.Y.Cai F.H.Cao j.q.Zhang DepartmentofChemistry ZhejiangUniversityHangzhou310027China DepartmentofChemistry ZhejiangUniversityHangzhou310027China／／StateKeyLaboratoryforCorrosionandProtectionInstituteofMetalResearchTheChineseAcademyofSciencesShenyang110016China

The influence of the concentration of Zn2+ ions on zinc electroplating process was investigated by means of electrochemical noise (EN) and cyclic voltammetry methods in conjunction with the scanning electron microscopy (SEM) technique. It was found that the EN generated during the electroplating of dentritic or large polymeric zinc deposit has large potential oscillation amplitude and positive potential drift while the compact zinc deposit possesses small noise amplitude and little potential drift. With the change of rate determining step from diffusion-control through mixed-control to activation-control, the maximum relative energy obtained from wavelet analysis defined from the region with larger scales to those with smaller scales, and the EDP (relative energy distribution plot) can be us, as 'fingerprints' of EN to characterize the electroplating process and the deposit structure. The results also showed that electrochemical noise technique can give more information about the electrodeposit structure than other normal electrochemical measurements, such as linear potential sweep method and cyclic voltammetry technique.

关键词： zinc electroplating zinc ions concentration electrochemical noise electrodeposit structure

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Highlights in applications of nanotechnology in radiation research

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Chinese journal of Cancer Research 2013年第5期25卷 613-614页

作者： Nancy q.Zhong Molly j.Wang Editorial Office Translational Cancer Research

Translational Cancer Research （Transl Cancer Res; TCR; Print ISSN： 2218-676X; Online ISSN 2219-6803; www. ***） launched in August 2013 a special issue on Applications of Nanotechnology in Radiation Research inviting Prof. Rao V.L. Papineni from University of Kansas Medical Center, Pataje G.S. Prasanna from National Cancer Institute and Mansoor M. Ahmed, National Cancer Institute to serve as the Guest Editors.

关键词： ISSN Highlights in applications of nanotechnology in radiation research

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MAKING DUCTILE CAST IRON WITH ESR PROCESS

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Acta Metallurgica Sinica(English Letters) 1998年第3期11卷 169-174页

作者： S.j.Chu H.H.Lou q.Niu Univ of Science and Technology Beijing Beijing China

Making ductile cast iron with ESR process under D.C. condition without adding spheroidizing inoculant alloys has been studied in laboratory. The key operation of ESR for cast iron is increasing the silicon content in unrefined consumable electrodes of flake graphite cast iron and using CaF2-based slags containing rare-earth or basic oxides and magnesium fluoride. The samples excel ductile cast iron produced by general technological process in fatigue strength and sealing performance.

关键词： ductile cast iron electroslag remelting nodulizing element

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Effect of carrier gases on the entrainment defects within AZ91 alloy castings

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journal of Magnesium and Alloys 2022年第1期10卷 142-159页

作者： Tian Li j.M.T.Davies Xiangzhen zhu University of Birmingham Birmingham 8152TTUnited Kingdom Grainger and Worrall Ltd Bridgnorth WV155HPUnited Kingdom Brunel Centre for Advanced Solidification Technology Brunel University LondonKingston LnLondonUxbridge UB83PHUnited Kingdom

An entrainment defect(also known as a double oxide film defect or bifilm) acts a void containing an entrapped gas when submerged into a light-alloy melt, thus reducing the quality and reproducibility of the final castings. Previous publications, carried out with Al-alloy castings, reported that this trapped gas could be subsequently consumed by the reaction with the surrounding melt, thus reducing the void volume and negative effect of entrainment defects. Compared with Al-alloys, the entrapped gas within Mg-alloy might be more efficiently consumed due to the relatively high reactivity of magnesium. However, research into the entrainment defects within Mg alloys has been significantly limited. In the present work, AZ91 alloy castings were produced under different carrier gas atmospheres(i.e., SF6/CO2, SF6/air).The evolution processes of the entrainment defects contained in AZ91 alloy were suggested according to the microstructure inspections and thermodynamic calculations. The defects formed in the different atmospheres have a similar sandwich-like structure, but their oxide films contained different combinations of compounds. The use of carrier gases, which were associated with different entrained-gas consumption rates, affected the reproducibility of AZ91 castings.

关键词： Magnesium alloy Casting Oxide film,Bifilm,Entrainment defect,Reproducibility

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THERMAL STRESSES RELAXATION DESIGN OF Ni/NiFe_(2)O_(4) SYSTEM FUNCTIONALLY GRADED CERMET INERT ANODE

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Acta Metallurgica Sinica(English Letters) 2005年第5期18卷 635-641页

作者： j. Li q.S. Zhang Y.q. Lai S.L. Ye Y.X. Liu School of Metallurgy Science and Engineering Central South University Changsha 410083 China

The thermal stresses relaxation of Ni/NiFe2O4 system functionally graded cermet inert anode for aluminum electrolysis was optimally designed. The transient thermal stresses of the inert anode under complex boundary condition during high-temp （955℃） electrolysis were calculated using the finite-element software ANSYS, the influence of different parameters on the distribution of the thermal stresses were analyzed. The results showed that, during the process of thermal shock, the thermal hoop tensile stress on the surface of the anode is very large, which is possibly the major cause of anode crack; when the radius of the anode is between 0.05-0.15m, a range that can be realized by recent manufacturing technology, the optimum composition distribution exponent p is 0.25; The hoop tensile stresses reduce with the decrease of anode scale and also decrease with the decrease of the convection coefficient between the electrolyte and the anode.

关键词： functionally graded material (FGM) transient thermal stresses ANSYS inert anode aluminum electrolysis

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Tensile Elastic Behavior of a Zr-Cu-Ag-Al Bulk Metallic Glass

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journal of Materials Science & Technology 2014年第6期30卷 595-598页

作者： q.P.Cao j.B.jin q.Yu X.D.Wang D.X.Zhang Y.jiang j.Z.jiang International Center for New-Structured Materials (ICNSM) State Key Laboratory of Silicon MaterialsDepartment of Materials Science and Engineering Zhejiang University Department of Mechanical Engineering University of Nevada Reno NV 89557 USA State Key Laboratory of Modern Optical Instrumentation Zhejiang University

Tensile elastic behavior of bulk Zr46（Cu4.5/5.5Ag1/5.5）46Al8 metallic glass was experimentally investigated. It exhibited linear and non-linear time-independent elastic deformation with a demarcative stress of approximately 500 MPa within the timescale in the present work, and repeated loading-unloading before yielding did not alter stress-strain relationship. The pure linear elastic strain limit is 0.6%, significantly lower than 2% as generally reported, but still much higher than 0.1% observed for typical crystalline alloys. Deviation from linear elastic behavior at stresses higher than 500 MPa is explained here as a macroscopic manifestation of local fluctuations in elastic strain, which becomes pronounced at stresses higher than the critical value. The occurrence of non-linear elasticity is possibly also related to the sinusoidal relationship between shear stress and atomic displacement.

关键词： Bulk metallic glass Tension test Elastic-plastic deformation

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