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| 1 | Analytical method for softness abrasive flow field based on discrete phase model显示文摘Aiming at the problem of difficult contact finishing for mini structural surface in course of mould manufacturing,a new no-tool precision machining method based on soft abrasive flow machining (SAFM) was proposed. It allocated restrained component near surface machined,constituted restrained abrasive flow passage,and made the surface become a segment of passage wall. It could control turbulence abrasive flow in restrained passage,realize micro cutting for passage wall,and utilize the irregular motion of abrasive flow to eliminate the mono-directional marks on machined surfaces,and the precision could reach the specular level. A two-phase dynamic model of abrasive flow oriented to SAFM combined with discrete phase model (DPM) was established,the law of two-phase flow motion and the related physical parameters was obtained by corresponding numerical simulation method,and the mechanism of precision machining in SAFM was discussed. Simulation results show that the abrasive flow machining process mainly appears as translation of ablating location with the influence by granular pressure,and as the variation of machining efficiency with the influence by near-wall particle velocity. Thus via control of the inlet velocity and its corresponding machining time,it is supposed to work out the machining process according to the machining requirements by using the Preston equation to seek the relationship among velocity,pressure and material removing rate. By tracking near-wall particles,it can be confirmed that the movement of near-wall abrasive particles is similar to stream-wise vortices. The cutting traces on workpiece surfaces assume disorderly arrangement,so the feasibility of the SAFM method can be reaffirmed. | JI ShiMing1,2, XIAO FengQing1,2 & TAN DaPeng1,2 1Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology, (Zhejiang University of Technology), Ministry of Education, Hangzhou 310014, China 2Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology of Zhejiang Province, Hangzhou 310014, China | 2010 | Science China(Technological Sciences)2010，53，10： | 28 |
| 2 | A fast algorithm for color image enhancement with total variation regularization显示文摘In this paper,a novel algorithm for color image enhancement is proposed.The proposed method,which is based on Retinex theory and total variational framework,improves the original variational method by using a TV penalty term to force spatial smoothness on the reflectance image.The split Bregman algorithm is employed to solve the proposed model.By practical experiments,it is verified that our method obtains better enhancement performance and much better calculation efficiency. | LI Ming1,2 1School of Computer Science and Technology,Huazhong University of Science and Technology,Wuhan 430074,China 2Key Laboratory of Education Ministry for Image Processing and Intelligent Control,Wuhan 430074,China | 2010 | Science China(Information Sciences)2010，53，9： | 14 |
| 3 | Flow structures in flat plate boundary layer induced by pulsed plasma actuator显示文摘The flow field in the flat plate boundary layer induced by the pulsed plasma actuator was simulated by solving the Navier-Stokes equations with a phenomenological DBD plasma model. The effects of actuation strength,wave form and frequency on the flow structures induced by the unsteady pulsed plasma actuator were investigated. The results indicated that a series of vortex pairs were formed in the boundary layer,and decayed in downstream convection following the exponential law. The strength of vortex pair was dominated by the effective plasma actuation strength,and the vortex streamwise spacing depended on the actuation frequency. If the duty cycle is not so large that interaction of adjacent vortex pairs can be negligible,then the actuation wave form has little influence on the vortex pair induced by the unsteady plasma actuator. | ZHANG PanFeng1,2, LIU AiBing1 & WANG JinJun1,2 1Institute of Fluid Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China 2Key Laboratory of Fluid Mechanics, Ministry of Education, Beijing 100191, China | 2010 | Science China(Technological Sciences)2010，53，10： | 8 |
| 4 | New insights into the species problem显示文摘Historical opinions of the 'species problem' are briefly reviewed, and four salient stages are recognized according to origin of species concepts. We propose that species is the unit preserving superior gene assembly and is maintained by specific mechanisms. Based on characteristics of plant evolution, we assume that understanding plant species may include three stages, i.e. morphological recognition stage, multidisciplinary verification stage, and illuminating mechanisms preserving superior gene assembly. | YANG Yong1 & ZHOU ZheKun2 1State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China 2Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China | 2010 | Science China(Life Sciences)2010，53，8： | 4 |
| 5 | Expression and function of heregulin-α and its receptors in the mouse mammary gland显示文摘Heregulin-α (HRGα) is a cytokine secreted by the mammary mesenchyme, adjacent to lobuloalveolar structures. To understand the role of HRGα and its receptors in mammary glands, and the underlying mechanisms, we performed this study to determine the expression and localization of HRGα and its receptors ErbB2 and ErbB3. We also determined the role of HRGα in the development of mammary glands, β-casein expression and secretion, Rab3A protein expression and the phosphorylation of HRGα signaling molecules using confocal laser scanning microscopy, tissue culture, capillary electrophoresis, Western blotting and enzyme-linked immunosorbent assays. We found that a peak was on pregnancy day 15. Changes of ErbB2 and ErbB3 expression were positively and linearly correlated with HRGα, indicating that HRGα positively regulates ErbB2 and ErbB3 expression. During pregnancy, HRGα enhanced the phosphorylation of STAT5, p42/p44, p38, PKC and Rab3A protein expression, stimulated the proliferation and differentiation of the ductal epithelial cells of mammary glands, and increased and maintained the expression and secretion of β-casein. During lactation, HRGα enhanced the phosphorylation of STAT5 and p38, inhibited the phosphorylation of PKC and Rab3A protein expression, maintained the morphology of the mammary glands and increased the secretion of lactoprotein to reduce the expression of β-casein in mammary epithelial cells. During involution, HRGα induced the phosphorylation of STAT3 and Rab3A protein expression, and inhibited the phosphorylation of PKC to stimulate the degeneration of mammary epithelial cells. It also inhibited the secretion of β-casein, resulting in increased levels of β-casein in mammary epithelial cells. | GENG LiJing1 & LI QingZhang2 1Institute of Food Science and Engineering, Liaoning Medical University, Jinzhou 121000, China 2Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China | 2010 | Science China(Life Sciences)2010，53，8： | 1 |
| 6 | Simulation of nuclei morphologies for binary alloy显示文摘We study the critical nuclei morphologies of a binary alloy by the string method. The dynamic equation of the string, connecting the metastable phase (liquid) and stable phase (solid), is governed by Helmholtz free energy for the binary alloy system at a given temperature. The stationary string through the critical nucleus (saddle point) is obtained if the relaxation time of the string is su?ciently large. The critical nucleus radius and energy barrier to nucleation of a pure alloy with isotropic interface energy in two and three dimensions are calculated, which are consistent with the classical nucleation theory. The critical nuclei morphologies are sensitive to the anisotropy strength of interface energy and interface thickness of alloy in two and three dimensions. The critical nucleus and energy barrier to nucleation become smaller if the anisotropy strength of the interface energy is increased, which means that it is much easier to form a stable nucleus if the anisotropy of the interface energy is considered. | LI DaMing1, & ZHANG PingWen2 1Department of Mathematics, Shanghai Jiaotong University, Shanghai 200240, China 2Key Lab of Mathematics and Applied Mathematics, Center for Applied Physics and Technology and School of Mathematical Sciences, Peking University, Beijing 100871, China | 2010 | Science China Mathematics2010，53，11： | 0 |
| 7 | Experimental study on hydrodynamic effect of orientation micro-pored surfaces显示文摘The orientation of the dimple increases the flow distance in the dimple and produces fluid cumulative effect in the dimple length direction, which leads to obvious hydrodynamic effect as a result. In order to investigate the hydrodynamic effect of orientation dimples, a series of experiments was carried out on a ring-on-ring test. Multi-pored faces were tested with different dimple inclination angles and slender ratios. Film thickness and frictional torque were measured under different conditions of load and rotation speed. Experimental results showed that the orientation dimple could produce obvious dynamic effect by change of the flow direction and the increasing dimple orientation leads to increase of the load capability. The hydrodynamic effect strongly depends on dimple orientation parameters such as inclination angle and slender ratio. A larger load capability can be available by increasing dimple orientation and rotation speed. Experimental results agreed well with the theory that orientation micro-pores can significantly improve hydrodynamic performance of surfaces. | BAI ShaoXian1,2, PENG XuDong1,2, LI JiYun1,2 & MENG XiangKai1,2 1College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310032, China 2Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education, Zhejiang University of Technology, Hangzhou 310032, China | 2011 | Science China(Technological Sciences)2011，54，3： | 20 |
| 8 | Research on theory and key technology of trusted computing platform security testing and evaluation显示文摘Trusted computing has become a new trend in the area of international information security, and the products of trusted computing platform begin to be used in application. Users will not use the products of information security, unless it goes through the testing and evaluation. Here we concentrate on the testing and evaluation problem of trusted computing platform, begin with constructing proper formalization model of trusted computing platform for testing, and establish a mathematical chain of trust model based on SPA. Moreover, we give a verification method of composite characteristics and find the potential factors threatening the trusted system in the process of remote attestation through analysis. For trusted software stack, we study the problem of automatic generation of test case and propose an improved method of generating the random test case, to raise the quality of test case. Finally, we give a prototype system of trusted computing platform and the actual test data related. The result demonstrates that there exist some flaws in the architecture of the present TCG computing platform. At the same time, some flaws are found in the products of existing trusted computing platform, thus a basis is laid for the improvement and development of trusted platform technology and its products. | ZHANG HuanGuo1,2, YAN Fei1,2, FU JianMing1,2, XU MingDi1,2, YANG Yang1,2, HE Fan1,2 & ZHAN Jing1,2 1School of Computer, Wuhan University, Wuhan 430072, China 2Key Laboratory of Aerospace Information Security and Trusted Computing, Ministry of Education, Wuhan 430072, China | 2010 | Science China(Information Sciences)2010，53，3： | 11 |
| 9 | QSAR and 3D-QSAR studies of the diacyl-hydrazine derivatives containing furan rings based on the density functional theory显示文摘QSAR studies of 27 diacyl-hydrazine derivatives containing furan rings were conducted and compared with the DFT method and AM1-MOPAC method.q2 values of 0.61 and 0.40 validated the predictability and reliability of eq.(5) from the DFT method were higher than those of eq.(6) from the AM1-MOPAC method.The DFT-optimized conformations and ESP-fitting charges of the target compounds were also used for 3D-QSAR analysis,including CoMFA and CoMSIA.The leave-one-out cross-validation correlation coefficient and the good correlation between the predicted and experimental activities of excluded test compounds revealed that CoMFA and CoMSIA models were robust.The QSAR results were consistent with the 3D-QSAR results,indicating that the electrostatic and hydrophobic properties of the target compounds were significant to the biological activity.These models are useful tools for predicting the larvicidal activities of new compounds and designing new specific insect growth regulators. | ZHANG Li1,2,CUI ZiNing1,YIN Bin1,YANG GuangFu2,LING Yun1 & YANG XinLing1 1Key Laboratory of Pesticide Chemistry and Application Technology,Ministry of Agriculture Department of Applied Chemistry,College of Science,China Agricultural University,Beijing 100193,China 2Key Laboratory of Pesticide & Chemical Biology,Ministry of Education,Huazhong Normal University,Wuhan 430079,China | 2010 | Science China Chemistry2010，53，6： | 5 |
| 10 | Understanding the endocrine disruption of chiral pesticides:The enantioselectivity in estrogenic activity of synthetic pyrethroids显示文摘Synthetic pyrethroids(SPs) ,a family of chiral insecticides consisting of multiple stereoismers,have been regarded as estrogenic endocrine-disrupting chemicals(EDCs) .In this study,we applied the yeast two-hybrid and molecular docking(MD) assay to assess the enantioselective estrogenic activities of three commonly used SPs,bifenthrin(cis-BF) ,permethrin(PM) and fenvalerate(Fen) .The β-galactosidase analyses indicated that all of the testing pyrethroids displayed significant(p<0.05) enantioselectivity.The results showed that the estrogenic potential of cis-BF was mainly attributed to 1S-cis-BF.Neither PM nor Fen showed estrogenic effects.However,two stereoisomers of PM possessed estrogenic potential activities.αR-2R-Fen and αS-2S-Fen also induced the β-galactosidase activity.The inability to initiate the reporter gene expression by the racemic chemicals may be due to the low ratios of these isomers or the antagonism among them.The strong hydrophobic interaction and the hydrogen bond between positive estrogenic isomers and ERα support our biological testing results.This research demonstrated that the enantioselective estrogenic activity of chiral SPs was due to selective binding between their isomers and the ERαreceptor.The data suggests that enantioselectivity of these chiral pesticides is significant to their estrogenic activities. | WANG Cui 1,ZHANG Quan 1,ZHANG XiaoFeng 1,LIU Jing 2 & LIU WeiPing 2 1College of Biological and Environmental Engineering,Zhejiang University of Technology,Hangzhou 310032,China 2Key Laboratory of Environmental Remediation and Ecosystem Health,Ministry of Education College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310029,China | 2010 | Science China Chemistry2010，53，5： | 4 |
| 11 | A community-centric approach to automated service composition显示文摘In the recent years, the web has kept growing rapidly and undergone tremendous changes towards a user-centric environment. With the proliferation of services available on the Internet, millions of users are able to voluntarily participate in and collaborate for their own interests and benefits by means of service composition. However, due to the ever increasing number of services, it then becomes a challenging issue to enable the users to rapidly select and compose the proper services. In this paper, we propose an approach which utilizes service communities for automated service composition. This paper makes three contributions. Firstly, we propose the service community architecture and identify two key components to facilitate service discovery and composition. Secondly, assisted by the service community, we provide two composition types to help users explore the space of potential composition opportunities without having to understand too many details of individual candidate services. Finally, we evaluate our approach by performance analysis and provide a web-based prototype that lowers the entry barrier for the users. | LIU XuanZhe1,2, HUANG Gang1,2 & MEI Hong1,2 1School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China 2Key Laboratory of High Confidence Software Technologies, Ministry of Education, Peking University, Beijing 100871, China | 2010 | Science China(Information Sciences)2010，53，1： | 4 |
| 12 | Electron transfer and interfacial behavior of redox proteins显示文摘This paper reviews the recent progress in the electron transfer and interfacial behavior of redox proteins. Significant achievements in the relevant fields are summarized including the direct electron transfer between proteins and electrodes, the thermodynamic and kinetic properties, catalytic activities and activity regulation of the redox proteins. It has been demonstrated that the electrochemical technique is an effective tool for protein studies, especially for probing into the electron transfer and interfacial behavior of redox proteins. | ZHOU NanDi1,2, CAO Ya1 & LI GenXi1,3 1State Key Laboratory of Pharmaceutical Biotechnology Department of Biochemistry, Nanjing University, Nanjing 210093, China 2Key Laboratory of Industrial Biotechnology, Ministry of Education School of Biotechnology, Jiangnan University, Wuxi 214122, China 3Laboratory of Biosensing Technology, School of Life Sciences, Shanghai University, Shanghai 200444, China | 2010 | Science China Chemistry2010，53，4： | 3 |
| 13 | Recognition behavior of chiral nanocomposites toward biomolecules and its application in electrochemical immunoassay显示文摘The novel nanocomposites were obtained by covalently linking arginine enantiomers with the sidewall of multi-walled carbon nanotubes,and utilized as sensing materials for biomolecular recognition in electrochemical immunoassay.They were characterized by X-ray photoelectron spectroscopy (XPS),transmission electron microscopy (TEM) and circular dichroism spectroscopy (CD).Nano-gold and Prussian Blue were employed to amplify the analytical signal responses.Prostate specific antibody/antigen and carcinoembryonic antibody/antigen were used as model systems.The results showed that the different configurations of nanocomposites could readily facilitate chiral recognition of antibodies,and D-nanocomposites displayed a larger signal. | FU YingZi1,CHEN Min1,CUI Xin2,WANG LiLan1,CHEN Qiao1 & ZHOU Juan1 1Key Laboratory on Luminescence and Real-Time Analysis,Ministry of Education College of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China 2Key Laboratory of Green Chemistry & Technology,Ministry of Education College of Chemistry,Sichuan University,Chengdu 610064,China | 2010 | Science China Chemistry2010，53，6： | 2 |
| 14 | NEW IDEAS AND METHODS ON GEOMECHANICAL SAFETY ANALYSIS OF TOXIC AND RADIOACTIVE WASTE REPOSITORIES IN SALT MINE显示文摘In view of the need for geomechanical safety analysis of repositories in salt rock, failure criteria,creep rupture criteria,material models,pillar design methods and criteria for the assessment of barrier efficiency as well as investigations of the interaction between hydraulics and mechanics for the case of uncontrolled flooded repositories are necessary. The introduction of damage mechanics and of the Hou/Lux material model including damages into geomechanical safety analysis of repositories in salt rock can reduce some previous deficits in knowledge and modelling. This article will be as a part of geotechnical assessment to introduce the Hou/Lux material model,a new concept of hydro-mechanical coupling and a pillar design method as well as criteria for the assessment of efficiency of geological barriers. | Hou Zhengmeng1 Wu Wen2 (1Institure of Disposal Technology and Geomechanics,Technical University of Clausthal,Erzstrasse 20,38678 Clausthal-Zellerfeld,Germany) (2Key Laboratory of Rock and Soil Mechanics,Institute of Rock and Soil Mechanics,The Chinese Academy of Sciences, Wuhan 430071 China) | 2002 | 岩石力学与工程学报2002，21，11： | 2 |
| 15 | New developments in small molecular compounds for anti-hepatitis C virus(HCV) therapy显示文摘Infection with hepatitis C virus(HCV) affects approximately 170 million people worldwide.However,no vaccine or immunoglobulin is currently available for the prevention of HCV infection.The standard of care(SOC) involving pegylated interferon-α(PEG-IFN α) plus ribavirin(RBV) for 48 weeks results in a sustained virologic response in less than 50% of patients with chronic hepatitis C genotype 1,the most prevalent type of HCV in North America and Europe.Recently,reliable in vitro culture systems have been developed for accelerating antiviral therapy research,and many new specifically targeted antiviral therapies for hepatitis C(STAT-C) and treatment strategies are being evaluated in clinical trials.These new antiviral agents are expected to improve present treatment significantly and may potentially shorten treatment duration.The aim of this review is to summarize the current developments in new anti-HCV drugs. | Jing TONG1,2,You-wei WANG2,Yuan-an LU1,2(1Department of Public Health Sciences,University of Hawaii,Honolulu,Hawaii 96822,USA)(2Key Laboratory of Combinatorial Biosynthesis and Drug Discovery,Ministry of Education,Institute of Traditional Chinese Medicine & Natural Products,School of Pharmaceutical Sciences,Wuhan University,Wuhan 430071,China) | 2012 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2012，13，1： | 2 |
| 16 | Concise synthesis of two advanced intermediates for the asymmetric synthesis of polyhydroxylated indolizidine alkaloids显示文摘A concise five-step approach to indolizidinones 10 and 11,two advanced intermediates for the asymmetric synthesis of polyhydroxylated indolizidine alkaloids,has been developed by using N-Cbz pyrrolidin-2-yl pyridin-2-yl sulfide 13 as the chiral building block.The method features a SmI2-mediated coupling of sulfide 13 with functionalized aldehyde 14 and a tandem N-deprotection-lactamization,which constitutes a stepwise '2 + 4' annulation method for the construction of the indolizidinone ring system of 12a. | ZHENG Xiao1,2,ZHU WenFang1 & HUANG PeiQiang1 1Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China 2Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032,China | 2010 | Science China Chemistry2010，53，9： | 2 |
| 17 | High norbornene incorporation in ethylene-norbornene copolymerization with a bis(α-alkyloxoimine) titanium-MAO catalyst显示文摘A novel bis(α-alkyloxoimine) titanium(IV) complex was synthesized and used as a catalyst precursor to catalyze homo-and copolymerization of ethylene and norbornene.The titanium complex activated with methylalumoxane exhibits good activities for the homopolymerizations of ethylene and norbornene under high temperature to produce high-molecular-weight linear polyethylene and vinyl-type polynorbornene,respectively.Ethylene-norbornene copolymers with high molecular weight can also be produced by this catalyst.The incorporation of norbornene from 0 to 76 mol% in the copolymers can be controlled by varying the charged norbornene.13C NMR analyses show that the microstructures of the ethylene-norbornene copolymers with low norbornene incorporation are predominantly alternated and isolated norbornene units,while those with high norbornene incorporation are random polymers containing long norbornene sequences. | GAO HaiYang1,2,HU Hao1 & WU Qing1,2 1Institute of Polymer Science,School of Chemistry and Chemical Engineering,Sun Yat-Sen (Zhongshan) University,Guangzhou 510275,China 2Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Sun Yat-Sen (Zhongshan) University,Guangzhou 510275,China | 2010 | Science China Chemistry2010，53，8： | 2 |
| 18 | Molecularly imprinted polymers with assistant recognition polymer chains for bovine serum albumin显示文摘A new protein molecularly imprinted polymer (MIP) was prepared with grafting polyvinyl alcohol as assistant recognition polymer chains (ARPCs). The ARPCs and acrylamide monomers were interpenetrated and then polymerized on the surface of macroporous acrylate adsorbent spheres. The template BSA was removed by treatment with 2.00 mol L-1 potassium chloride (KCl) solution and the adsorbed proteins were detected with sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). 0.150, 0.500, and 2.00 mol L-1 KCl solutions were used as eluent to wash the adsorbed proteins. The SDS-PAGE results show that proteins washed out with 2.00 mol L-1KCl solution were from nonspecific adsorption of macroporous acrylate adsorbent spheres, and proteins washed out with 0.500 mol L-1KC1 solution were specific proteins imprinted by MIP resins. MIP resins with ARPCs had better recognition to the target proteins than that without ARPCs. The adsorption capacity of MIP resins immobilized ARPCs to the template BSA was about 80-100 μg g-1 when it was used for the adsorption of proteins mixture, and the specific adsorption of the target protein was obviously increased. | GUO MinJie1, GAO Ting1, FAN Zhi1, YAO JingXia1, XIA JianJun2 & MI HuaiFeng2 1Department of Chemistry, College of Sciences, Tianjin University of Science and Technology, Tianjin 300457, China 2Key Laboratory of Functional Polymer Materials, Ministry of Education Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China | 2010 | Science China Chemistry2010，53，4： | 2 |
| 19 | Birthrates and delay times of Type Ia supernovae显示文摘Type Ia supernovae (SNe Ia) play an important role in diverse areas of astrophysics, from the chemical evolution of galaxies to observational cosmology. However, the nature of the progenitors of SNe Ia is still unclear. In this paper, according to a detailed binary population synthesis study, we obtained SN Ia birthrates and delay times from different progenitor models, and compared them with observations. We find that the Galactic SN Ia birthrate from the double-degenerate (DD) model is close to those inferred from observations, while the birthrate from the single-degenerate (SD) model accounts for only about 1/2-2/3 of the observations. If a single starburst is assumed, the distribution of the delay times of SNe Ia from the SD model is a weak bimodality, where the WD + He channel contributes to the SNe Ia with delay times shorter than 100 Myr, and the WD + MS and WD + RG channels to those with age longer than 1 Gyr. | WANG Bo1,2,3, LIU ZhengWei1,2,3, HAN YunKun1,2,3, LEI ZhenXin1,2,3, LUO YangPing1,2,3 & HAN ZhanWen1,2 1National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3Graduate University of Chinese Academy of Sciences, Beijing 100049, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，3： | 2 |
| 20 | An inkjet printing soft photomask and its application on organic polymer substrates显示文摘This article presents a simple,fast and low-cost method to fabricate a flexible UV light photomask.The designed micropatterns were directly printed onto transparent hybrid composite film of biaxially oriented polypropylene coated with silica oxide (BOPP-SiOx) by an inkjet printer.Compared to the conventional chrome-mask,it is of advantages such as suitable for non-planar substrates,scalable for large area production,and extreme low cost.Combined with the confined photo-catalytic oxidation (CPO) reaction,the printed flexible BOPP-SiOx photomask was successfully used to pattern the shape of wettability of organic polymer surfaces,and then polyaniline patterns were deposited on the modified substrates with strong adhesion.With the above photomasks,the polyacrylic acid graft chains were duplicated on the poly (ethylene terephthalate) (PET) and BOPP substrates by photografting polymerization.We grafted polyacrylic acid (PAA) on a non-planar plastic substrate with this soft and thin plastic photomask.Scanning electron microscopy (SEM) and optical microscopy were used to characterize the surface morphology and thickness of ink layers of the printed photomask.Optical microscopy was used to characterize the deposition polyaniline micropatterns.It was found that the desired patterns were precisely printed on the modified polymer films and were applied in modifying organic polymer substrates.The printed photomask could be exploited in the fields such as prototype microfluidics,micro-sensors,optical structures and any other kind of microstructures which does not require high durability and dimensional stability. | WANG LuLin1,MA YuHong2,CHEN MengJun1,YAO Hui1,ZHENG XiaoMan1 & YANG WanTai1,2 1State Key Laboratory of Chemical Resource Engineering College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China 2Key Laboratory of Carbon Fiber and Functional Polymers,Ministry of Education Beijing University of Chemical Technology,Beijing 100029,China | 2010 | Science China Chemistry2010，53，8： | 1 |
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