Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6472988
Song Wan-ying, Jin Mei-hui, Liu Yiang, Guo Mo-ran, Gao Ming-xi, Hu Xin-yue, Shi Jing, Li Hui, Ma Zhen-fang, Zhang Xi-he, Cai Hong-xing
Ethanethiol is a kind of coupled molecule, it can combine gold nanorods more closely and play a part in surface modification. In this work, geometry structure was optimized by Hartree-Fock (HF) method. Raman spectra was calculated based on MP2/6-31G sets and DFT/6-21G sets, then two theoretical raman spectra were carefully compared with others experimental spectra, good agreements were obtained between the theoretical and experimental results. Ethanethiol structure parameters were given also in the paper including bond lengths and bond angles. Vibrational modes were assigned to all bands between 500-3500 cm-1 range. This work will benefit for investigating ethanethiol as Surfactant of gold nanorods.
{"title":"The study of ethanethiol structure and vibrational spectra based on Ab initio","authors":"Song Wan-ying, Jin Mei-hui, Liu Yiang, Guo Mo-ran, Gao Ming-xi, Hu Xin-yue, Shi Jing, Li Hui, Ma Zhen-fang, Zhang Xi-he, Cai Hong-xing","doi":"10.1109/3M-NANO.2012.6472988","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6472988","url":null,"abstract":"Ethanethiol is a kind of coupled molecule, it can combine gold nanorods more closely and play a part in surface modification. In this work, geometry structure was optimized by Hartree-Fock (HF) method. Raman spectra was calculated based on MP2/6-31G sets and DFT/6-21G sets, then two theoretical raman spectra were carefully compared with others experimental spectra, good agreements were obtained between the theoretical and experimental results. Ethanethiol structure parameters were given also in the paper including bond lengths and bond angles. Vibrational modes were assigned to all bands between 500-3500 cm-1 range. This work will benefit for investigating ethanethiol as Surfactant of gold nanorods.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126302208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6472940
L. Clark, U. Bhagat, B. Shirinzadeh, P. Chea, Y. Qin, Y. Tian
The work presented in this paper focuses on the design of a novel flexure-based mechanism capable of delivering planar motion with three degrees of freedom (3-DOF). Pseudo rigid body modeling (PRBM) and kinematic analysis of the mechanism are used to predict the motion of the mechanism in the X-, Y- and θ-directions. Lever based amplification is used to enhance the displacement of the mechanism. The presented design is small and compact in size (about 142mm by 110mm). The presented 3-DOF flexure-based miniature micro/nano mechanism delivers smooth motion in X, Y and θ, with maximum displacements of 142.09 μm in X-direction, 120.36 μm in Y-direction and 6.026 mrad in θ-rotation.
{"title":"Design of a miniature 3-DOF flexure-based mechanism for micro/nano manipulation","authors":"L. Clark, U. Bhagat, B. Shirinzadeh, P. Chea, Y. Qin, Y. Tian","doi":"10.1109/3M-NANO.2012.6472940","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6472940","url":null,"abstract":"The work presented in this paper focuses on the design of a novel flexure-based mechanism capable of delivering planar motion with three degrees of freedom (3-DOF). Pseudo rigid body modeling (PRBM) and kinematic analysis of the mechanism are used to predict the motion of the mechanism in the X-, Y- and θ-directions. Lever based amplification is used to enhance the displacement of the mechanism. The presented design is small and compact in size (about 142mm by 110mm). The presented 3-DOF flexure-based miniature micro/nano mechanism delivers smooth motion in X, Y and θ, with maximum displacements of 142.09 μm in X-direction, 120.36 μm in Y-direction and 6.026 mrad in θ-rotation.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127131204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6472944
Liguo Chen, Shaoqian Li, Hai-hang Cui, Xu Zheng
A kind of microfluidic chip based on dielectrophoresis (DEP) was designed for the purpose of trapping two particles with different sizes. In order to reach the purpose, the shape of electrode and the shape of the flow channel was designed, the electric field and the flow field of the chip was simulated. At last, the trajectory of the particles was obtained. The results show that the chip can complete pairing two particles with different sizes.
{"title":"Numerical simulation about trapping two particles in microfluidic dielectrophoretic chip","authors":"Liguo Chen, Shaoqian Li, Hai-hang Cui, Xu Zheng","doi":"10.1109/3M-NANO.2012.6472944","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6472944","url":null,"abstract":"A kind of microfluidic chip based on dielectrophoresis (DEP) was designed for the purpose of trapping two particles with different sizes. In order to reach the purpose, the shape of electrode and the shape of the flow channel was designed, the electric field and the flow field of the chip was simulated. At last, the trajectory of the particles was obtained. The results show that the chip can complete pairing two particles with different sizes.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122281116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6472946
Zhiming Guo, Shibin Wang, D. Cui, H. Jia, Lin’an Li
In this paper, we investigated the initiation of the straight-side buckling of the compressed thin film on flat PMMA substrate under alternate loads, with emphasis on the influences of loading frequency, film thickness and load amplitude on the initiation of the buckling, respectively. A fatigue-loading device based on piezoelectric ceramics has been designed for making the cyclic loadings available. The instability phenomenon has been recorded using a CCD camera and an optical microscope. The aluminum and copper thin films were studied in the experiments, the different loading modes have been involved in detailed experimental analysis. At present, experimental investigations of thin film buckling under cyclic load may be an efficient engineering solution in many practical fields such as micro-electro-mechanical systems(MEMS).
{"title":"Initiation of nano-film bucklings under low-frequency alternate loads","authors":"Zhiming Guo, Shibin Wang, D. Cui, H. Jia, Lin’an Li","doi":"10.1109/3M-NANO.2012.6472946","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6472946","url":null,"abstract":"In this paper, we investigated the initiation of the straight-side buckling of the compressed thin film on flat PMMA substrate under alternate loads, with emphasis on the influences of loading frequency, film thickness and load amplitude on the initiation of the buckling, respectively. A fatigue-loading device based on piezoelectric ceramics has been designed for making the cyclic loadings available. The instability phenomenon has been recorded using a CCD camera and an optical microscope. The aluminum and copper thin films were studied in the experiments, the different loading modes have been involved in detailed experimental analysis. At present, experimental investigations of thin film buckling under cyclic load may be an efficient engineering solution in many practical fields such as micro-electro-mechanical systems(MEMS).","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128495590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6472976
W. He, Shibin Wang, D. Cui, H. Jia, Lin’an Li
Thin metal films deposited on elastic substrates are widely used as electrodes and interconnects in Micro-Electro-Mechanical Systems (MEMS) and their fatigue property needs to be sufficiently understood. In this paper, the buckling propagation of nano-thin film relying on a substrate under alternating load has been experimentally studied. The effect of loading condition on buckling propagation is discussed in terms of the frequency, film thickness and number of cycles. In particular, buckling growth rate has been analyzed by means of digital image processing technology. Moreover, two kinds of samples have been designed to compare the influence of different materials.
{"title":"Buckling propagation of thin films on elastic substrates under alternating load","authors":"W. He, Shibin Wang, D. Cui, H. Jia, Lin’an Li","doi":"10.1109/3M-NANO.2012.6472976","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6472976","url":null,"abstract":"Thin metal films deposited on elastic substrates are widely used as electrodes and interconnects in Micro-Electro-Mechanical Systems (MEMS) and their fatigue property needs to be sufficiently understood. In this paper, the buckling propagation of nano-thin film relying on a substrate under alternating load has been experimentally studied. The effect of loading condition on buckling propagation is discussed in terms of the frequency, film thickness and number of cycles. In particular, buckling growth rate has been analyzed by means of digital image processing technology. Moreover, two kinds of samples have been designed to compare the influence of different materials.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133535247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6472949
Wenrong Wang, Tie Li, Yuxiu Zhou, C. Liang, Yuelin Wang
In this paper, undoped and N-doped few-layer graphene (FLG) films were synthesized by ambient pressure chemical vapor deposition. The different photoresponse between these two kinds of FLG based photonic devices was discussed. Photoconductive and photovoltaic responses were found respectively in undoped and N-doped FLG based photonic devices. Under IR lamp illumination in vacuum, the resistance changed in undoped FLG based device while photocurrent at zero voltage bias was found in N-doped FLG based device. The photoconductive effect was enhanced as the temperature decreased, on the contrary, the photocurrent was found to decrease as the temperature decreased from room temperature to 78K.
{"title":"Different responses between undoped and N-doped few-layer graphene based photonic devices","authors":"Wenrong Wang, Tie Li, Yuxiu Zhou, C. Liang, Yuelin Wang","doi":"10.1109/3M-NANO.2012.6472949","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6472949","url":null,"abstract":"In this paper, undoped and N-doped few-layer graphene (FLG) films were synthesized by ambient pressure chemical vapor deposition. The different photoresponse between these two kinds of FLG based photonic devices was discussed. Photoconductive and photovoltaic responses were found respectively in undoped and N-doped FLG based photonic devices. Under IR lamp illumination in vacuum, the resistance changed in undoped FLG based device while photocurrent at zero voltage bias was found in N-doped FLG based device. The photoconductive effect was enhanced as the temperature decreased, on the contrary, the photocurrent was found to decrease as the temperature decreased from room temperature to 78K.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117150750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6473001
Y. Lei, Zuobin Wang, Jia Xu, Jinjin Zhang, Dapeng Wang, Yu Hou, Y. Yue, Dayou Li
This paper describes a method of determining two-dimensional phase shifts. In this method, the two-dimensional phase shift is divided into horizontal and vertical components, and each component of the phase shift is determined by pattern correlation, Pythagorean theorem and linear interpolation with subpixel accuracy. The computer simulation and experiment have shown that the method is useful for the determination of phase difference between two three-beam interference patterns. The method can also be used to determine the phase shift in other multi-beam interference patterns.
{"title":"Determination of two-dimensional phase shifts in three-beam laser interference patterns","authors":"Y. Lei, Zuobin Wang, Jia Xu, Jinjin Zhang, Dapeng Wang, Yu Hou, Y. Yue, Dayou Li","doi":"10.1109/3M-NANO.2012.6473001","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6473001","url":null,"abstract":"This paper describes a method of determining two-dimensional phase shifts. In this method, the two-dimensional phase shift is divided into horizontal and vertical components, and each component of the phase shift is determined by pattern correlation, Pythagorean theorem and linear interpolation with subpixel accuracy. The computer simulation and experiment have shown that the method is useful for the determination of phase difference between two three-beam interference patterns. The method can also be used to determine the phase shift in other multi-beam interference patterns.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114915697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6472937
Bo Chang, A. Virta, Quan Zhou
This paper proposes a hybrid microassembly technique for massively parallel assembly of 200μm × 200μm × 30μm SU-8 chips. The hybrid microassembly technique combines the robotic pick-and-place technique and water mist induced self-assembly technique. The robotic handling tool is used to place microchips roughly on chips of the same size at a fast speed, and then water mist composed of microscopic droplets is delivered to achieve high accuracy and massively parallel alignments. The results indicate the hybrid assembly technique is promising for assembly of microchips. A 200μm × 200μm × 70μm SU-8 chip is assembled on the top of another SU-8 chip of the same size; where the success rate can reach 80% with bias as high as 130μm in x- and y directions. We have demonstrated that the proposed technique in assembly a matrix of 30 200μm × 200μm SU-8 chips. The results also show that alignment can reach sub micrometer accuracy.
{"title":"Hybrid microassembly for massively parallel assembly of microchips with water mist","authors":"Bo Chang, A. Virta, Quan Zhou","doi":"10.1109/3M-NANO.2012.6472937","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6472937","url":null,"abstract":"This paper proposes a hybrid microassembly technique for massively parallel assembly of 200μm × 200μm × 30μm SU-8 chips. The hybrid microassembly technique combines the robotic pick-and-place technique and water mist induced self-assembly technique. The robotic handling tool is used to place microchips roughly on chips of the same size at a fast speed, and then water mist composed of microscopic droplets is delivered to achieve high accuracy and massively parallel alignments. The results indicate the hybrid assembly technique is promising for assembly of microchips. A 200μm × 200μm × 70μm SU-8 chip is assembled on the top of another SU-8 chip of the same size; where the success rate can reach 80% with bias as high as 130μm in x- and y directions. We have demonstrated that the proposed technique in assembly a matrix of 30 200μm × 200μm SU-8 chips. The results also show that alignment can reach sub micrometer accuracy.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124044116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6473006
Pingping Zhang, Yan Ma, Tongbao Li
Periodic nanostructures spaced by half of the wavelength applied for nanometrology can be obtained by laser-focused atomic deposition. Experimental result with standing wave light mask is presented, showing a periodicity of 213 ± 0.1nm, a height of 4nm and a feature width of 64 ± 6nm. To further minimize the feature width and enhance the peak-to-valley contrast of the deposited lines, the effects of imperfect chromium source are numerically simulated with Optimized Particle Optics model, where the initial condition of each trajectory is stochastically selected. Simulation results show that the isotope contributes to the accumulation of background and further broadens the feature width. The predicted line width is sensitive with the oven temperature in thin lens regime. The feature widths obtained are 29nm, 46nm and 75nm respectively when the FWHMs of the transverse angular spread are 0.16mrad, 0.3mrad and 0.5mrad. The transverse angular spread plays a central role in broadening the feature width, even when the longitudinal velocity spread is thermal.
{"title":"Analysis of imperfect chromium source in 1D atom lithography for nanometrology","authors":"Pingping Zhang, Yan Ma, Tongbao Li","doi":"10.1109/3M-NANO.2012.6473006","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6473006","url":null,"abstract":"Periodic nanostructures spaced by half of the wavelength applied for nanometrology can be obtained by laser-focused atomic deposition. Experimental result with standing wave light mask is presented, showing a periodicity of 213 ± 0.1nm, a height of 4nm and a feature width of 64 ± 6nm. To further minimize the feature width and enhance the peak-to-valley contrast of the deposited lines, the effects of imperfect chromium source are numerically simulated with Optimized Particle Optics model, where the initial condition of each trajectory is stochastically selected. Simulation results show that the isotope contributes to the accumulation of background and further broadens the feature width. The predicted line width is sensitive with the oven temperature in thin lens regime. The feature widths obtained are 29nm, 46nm and 75nm respectively when the FWHMs of the transverse angular spread are 0.16mrad, 0.3mrad and 0.5mrad. The transverse angular spread plays a central role in broadening the feature width, even when the longitudinal velocity spread is thermal.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129832283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-08-01DOI: 10.1109/3M-NANO.2012.6473005
Wu Rong, Li Jin, Hou Juan, Chang Ai-min
Undoped, Cu-, Fe- and Co-doped ZnS nanostructures were synthesized by solvothermal reaction of Zn(CH3COO)2·2H2O and (NH2)2CS with PVP dissolved in the hydrazine hydrate. X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive x-ray spectroscopy (EDX) were employed to characterize the structure and morphology of the product. The results showed that copper incorporation in the ZnS induced a phase transformation from hexagonal wurtzite to cubic blende structure, and the morphologies of doped ZnS are found to be Cu, Fe and Co-doped concentration dependent.
{"title":"Synthesis of transition metal (Cu, Fe and Co) doped ZnS nanostructures","authors":"Wu Rong, Li Jin, Hou Juan, Chang Ai-min","doi":"10.1109/3M-NANO.2012.6473005","DOIUrl":"https://doi.org/10.1109/3M-NANO.2012.6473005","url":null,"abstract":"Undoped, Cu-, Fe- and Co-doped ZnS nanostructures were synthesized by solvothermal reaction of Zn(CH3COO)2·2H2O and (NH2)2CS with PVP dissolved in the hydrazine hydrate. X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive x-ray spectroscopy (EDX) were employed to characterize the structure and morphology of the product. The results showed that copper incorporation in the ZnS induced a phase transformation from hexagonal wurtzite to cubic blende structure, and the morphologies of doped ZnS are found to be Cu, Fe and Co-doped concentration dependent.","PeriodicalId":134364,"journal":{"name":"2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133994901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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