Pub Date : 2012-07-09DOI: 10.1109/ISAF.2012.6297842
P. Bednyakov, N. Setter, D. Rytz
Dielectric properties of K(Ta0,55Nb0,45)O3 [KTN] single crystals with <;100>; and <;011>; crystallographic orientation were studied. Temperature dependencies of dielectric permittivity of monodomain and polydomain crystals of these orientations are compared.
{"title":"Dielectric properties of K(Ta0.55Nb0.45)O3 single crystal","authors":"P. Bednyakov, N. Setter, D. Rytz","doi":"10.1109/ISAF.2012.6297842","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297842","url":null,"abstract":"Dielectric properties of K(Ta<sub>0,55</sub>Nb<sub>0,45</sub>)O<sub>3</sub> [KTN] single crystals with <;100>; and <;011>; crystallographic orientation were studied. Temperature dependencies of dielectric permittivity of monodomain and polydomain crystals of these orientations are compared.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"25 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78832888","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297865
A. Klíč, I. Rychetský
Polycrystal modeled as close-packed uniaxial grains (crystallites) of various orientaions can be described using the spectral representation. It is formally similar to the isotropic 2-component composite, but with different meaning of structural characteristics. In particular, the volume fraction used in composites is replaced with the spacial mean value of crystallite orientations. It is illustrated on the simple example, that the structural quantities depends on the true volume fractions and also on the orientations of grains.
{"title":"Effective dielectric response of anisotropic grains of close-packed structure","authors":"A. Klíč, I. Rychetský","doi":"10.1109/ISAF.2012.6297865","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297865","url":null,"abstract":"Polycrystal modeled as close-packed uniaxial grains (crystallites) of various orientaions can be described using the spectral representation. It is formally similar to the isotropic 2-component composite, but with different meaning of structural characteristics. In particular, the volume fraction used in composites is replaced with the spacial mean value of crystallite orientations. It is illustrated on the simple example, that the structural quantities depends on the true volume fractions and also on the orientations of grains.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"49 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76652537","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297753
B. Rožič, S. Gyergyek, Z. Kutnjak, M. Jagodič, S. Kralj, M. Jagodič, Z. Jagličić, V. Tzitzios
By using the SQUID susceptometer the existence of an indirect magnetoelectricity in a soft composite material prepared as a mixture of a ferroelectric liquid crystal (FLC) and magnetic nanoparticles (MNPs) was verified. It is shown that the orientation of MNPs is directly coupled to the FLC molecular director field. Such coupling allows the possibility of indirect coupling between the MNP's magnetization and FLC's polarization. This demonstrates the possibility to engineer the soft magnetoelectrics from mixtures of magnetic nanoparticles and ferroelectric liquid crystals.
{"title":"Magnetoelectric effect in soft composite materials","authors":"B. Rožič, S. Gyergyek, Z. Kutnjak, M. Jagodič, S. Kralj, M. Jagodič, Z. Jagličić, V. Tzitzios","doi":"10.1109/ISAF.2012.6297753","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297753","url":null,"abstract":"By using the SQUID susceptometer the existence of an indirect magnetoelectricity in a soft composite material prepared as a mixture of a ferroelectric liquid crystal (FLC) and magnetic nanoparticles (MNPs) was verified. It is shown that the orientation of MNPs is directly coupled to the FLC molecular director field. Such coupling allows the possibility of indirect coupling between the MNP's magnetization and FLC's polarization. This demonstrates the possibility to engineer the soft magnetoelectrics from mixtures of magnetic nanoparticles and ferroelectric liquid crystals.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"63 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84047196","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297841
D. Bochenek, P. Niemiec, P. Wawrzała, A. Chrobak
In the work, the ferroelectric-ferromagnetic composites were obtained on the basis of a ferroelectric powder of PZT type. Admixtured compositions of PZT type powders constituted ferroelectric, ferroelectric powder (90% of amount), whereas nickel-zinc ferrite (Ni1-xZnxFe2O4) was the magnetic content in the composite (10% of amount). Synthesizing the composite content was performed using compact sintering in the solid phase, while densification of the synthesized composite powder using the conventional sintering method. X-ray, tests, as well as microstructure, dielectric, magnetic and electric hysteresis loop tests were carried out. The tests showed existence of correlation between a magnetic and electric subsystems in the ferroelectric-ferromagnetic composites. Thanks to ferroelectric and magnetic properties of the composites obtained, materials of such type may be applied in new memory types.
{"title":"Ferroelectric-ferromagnetic composites based on PZT type ceramic and NiZnFe ferrite","authors":"D. Bochenek, P. Niemiec, P. Wawrzała, A. Chrobak","doi":"10.1109/ISAF.2012.6297841","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297841","url":null,"abstract":"In the work, the ferroelectric-ferromagnetic composites were obtained on the basis of a ferroelectric powder of PZT type. Admixtured compositions of PZT type powders constituted ferroelectric, ferroelectric powder (90% of amount), whereas nickel-zinc ferrite (Ni1-xZnxFe2O4) was the magnetic content in the composite (10% of amount). Synthesizing the composite content was performed using compact sintering in the solid phase, while densification of the synthesized composite powder using the conventional sintering method. X-ray, tests, as well as microstructure, dielectric, magnetic and electric hysteresis loop tests were carried out. The tests showed existence of correlation between a magnetic and electric subsystems in the ferroelectric-ferromagnetic composites. Thanks to ferroelectric and magnetic properties of the composites obtained, materials of such type may be applied in new memory types.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"19 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84465804","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297749
M. S. Woo, S. Hong, H. Jung, C. Yang, D. Song, T. Sung
A novel piezoelectric energy harvesting module with controllable strain was designed to allow investigations into the correlations among strain, frequency, and output power. Specifically, although conventional vibration modules allow control over strain only through variation in tip mass, the proposed module allows more accurate strain control through adjustment of the displacement of the free end of the cantilever (5-45 mm). Experiments showed that both types of modules exhibit an increase in open circuit output voltage with strain, but the piezoelectric material fails at severe strain. In addition, it was confirmed that the proposed module design can keep the output voltage constant by controlling the strain, which allows investigation into the relationship between frequency and output power. Thus, at constant strain, the matching impedance was found to be low at high frequency. Therefore, optimum conditions for harvesting maximum power are high frequency and the largest strain that does not damage the piezoelectric material.
{"title":"Strain control for optimization of piezoelectric energy harvesting","authors":"M. S. Woo, S. Hong, H. Jung, C. Yang, D. Song, T. Sung","doi":"10.1109/ISAF.2012.6297749","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297749","url":null,"abstract":"A novel piezoelectric energy harvesting module with controllable strain was designed to allow investigations into the correlations among strain, frequency, and output power. Specifically, although conventional vibration modules allow control over strain only through variation in tip mass, the proposed module allows more accurate strain control through adjustment of the displacement of the free end of the cantilever (5-45 mm). Experiments showed that both types of modules exhibit an increase in open circuit output voltage with strain, but the piezoelectric material fails at severe strain. In addition, it was confirmed that the proposed module design can keep the output voltage constant by controlling the strain, which allows investigation into the relationship between frequency and output power. Thus, at constant strain, the matching impedance was found to be low at high frequency. Therefore, optimum conditions for harvesting maximum power are high frequency and the largest strain that does not damage the piezoelectric material.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"43 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79931000","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297719
Y. Dekhtyar, A. Griva, L. Lancere, B. Andersons, E. Sansonetti
Wettability of the poly methyl methacrylate (PMMA) surface defines its biocompatibility being essential factor for biomedical applications. The processed surface degrades in time therefore the prostheses/lens should be repaired to keep the patient at a high life quality level. However the most common methods can be considered as sophisticated (plasma treatment, laser treatment, etc.). The research presents novel result on the PMMA surface wettability engineering by means of non-ionizing ultraviolet radiation (200-400nm). Results (electron work function (φ), photoelectron emission spectra, optical absorption) show alteration from hydrophobic to hydrophilic surface behaviour. Both the surface (photoelectron emission) and the bulk (optical absorption) interacting centres were influenced by radiation showing maximum effect after 45 minutes of irradiation.
{"title":"Wettability of the PMMA surface caused by its polarization due to UV radiation","authors":"Y. Dekhtyar, A. Griva, L. Lancere, B. Andersons, E. Sansonetti","doi":"10.1109/ISAF.2012.6297719","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297719","url":null,"abstract":"Wettability of the poly methyl methacrylate (PMMA) surface defines its biocompatibility being essential factor for biomedical applications. The processed surface degrades in time therefore the prostheses/lens should be repaired to keep the patient at a high life quality level. However the most common methods can be considered as sophisticated (plasma treatment, laser treatment, etc.). The research presents novel result on the PMMA surface wettability engineering by means of non-ionizing ultraviolet radiation (200-400nm). Results (electron work function (φ), photoelectron emission spectra, optical absorption) show alteration from hydrophobic to hydrophilic surface behaviour. Both the surface (photoelectron emission) and the bulk (optical absorption) interacting centres were influenced by radiation showing maximum effect after 45 minutes of irradiation.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"19 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86622572","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297812
S. Yin, G. Le Rhun, E. Defay, B. Vilquin, G. Niu, Y. Robach, C. Drăgoi, L. Trupina, L. Pintilie
Epitaxial Pb(Zr0.52Ti0.48)O3 (PZT) thin film has been successfully integrated on Si(001) substrate by sol-gel method. SrTiO3 (STO) layer deposited on Si by Molecular Beam Epitaxy (MBE) acts as a template layer in this study to avoid the formation of amorphous SiO2, and allows the chemical compatibility for further epitaxial growth. For bottom electrode, SrRuO3 (SRO) layer grown by Pulsed Laser Deposition (PLD) on STO/Si was used. Epitaxial single crystalline growth of PZT film after Rapid Thermal Annealing (RTA) at 650°C was evidenced by X-Ray Diffraction (XRD). The following relationship in the heterostructure was deduced: [110] PZT (001) // [110] SRO (001) // [110] STO (001) // [100] Si (001). A clear piezoelectric response of the film was observed by Piezoresponse Force Microscope (PFM). Moreover, the structural STO quality was proved to have a major impact on the electrical properties of PZT films.
{"title":"Pizeoelectric epitaxial sol-gel Pb(Zr0.52Ti0.48)O3 film on Si(001)","authors":"S. Yin, G. Le Rhun, E. Defay, B. Vilquin, G. Niu, Y. Robach, C. Drăgoi, L. Trupina, L. Pintilie","doi":"10.1109/ISAF.2012.6297812","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297812","url":null,"abstract":"Epitaxial Pb(Zr0.52Ti0.48)O3 (PZT) thin film has been successfully integrated on Si(001) substrate by sol-gel method. SrTiO3 (STO) layer deposited on Si by Molecular Beam Epitaxy (MBE) acts as a template layer in this study to avoid the formation of amorphous SiO2, and allows the chemical compatibility for further epitaxial growth. For bottom electrode, SrRuO3 (SRO) layer grown by Pulsed Laser Deposition (PLD) on STO/Si was used. Epitaxial single crystalline growth of PZT film after Rapid Thermal Annealing (RTA) at 650°C was evidenced by X-Ray Diffraction (XRD). The following relationship in the heterostructure was deduced: [110] PZT (001) // [110] SRO (001) // [110] STO (001) // [100] Si (001). A clear piezoelectric response of the film was observed by Piezoresponse Force Microscope (PFM). Moreover, the structural STO quality was proved to have a major impact on the electrical properties of PZT films.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"434 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77507502","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297866
A. Axelsson, F. Aguesse, N. Alford, M. Valant
In bulk ceramics, interfaces between adjacent materials can be neglected when evaluating the individual functional properties on the macroscale. However, in nanostructured materials, a region described as an interfacial region can comprise up to 10% of the total volume. By traditional XRD and SEM these regions may be hard to describe. Here we present how a combination of non destructive material analysis and property analysis brings knowledge of the chemistry at the interfaces and microstructure in the film. Epitaxial thin film CoFe2O4 were grown on several growth templates such as SrTiO3, LaAlO3, BaTiO3 and MgO as to vary the interfacial region and subsequent growth mechanism. The chemical stability and crystallographic matching between the magnetic film and the dielectric growth template are discussed where dramatic changes of the functional properties of these nanoscale structures demonstrate that the interfaces have a deleterious effect on the properties.
{"title":"Role of interfaces in nanostructured CoFe2O4 films","authors":"A. Axelsson, F. Aguesse, N. Alford, M. Valant","doi":"10.1109/ISAF.2012.6297866","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297866","url":null,"abstract":"In bulk ceramics, interfaces between adjacent materials can be neglected when evaluating the individual functional properties on the macroscale. However, in nanostructured materials, a region described as an interfacial region can comprise up to 10% of the total volume. By traditional XRD and SEM these regions may be hard to describe. Here we present how a combination of non destructive material analysis and property analysis brings knowledge of the chemistry at the interfaces and microstructure in the film. Epitaxial thin film CoFe2O4 were grown on several growth templates such as SrTiO3, LaAlO3, BaTiO3 and MgO as to vary the interfacial region and subsequent growth mechanism. The chemical stability and crystallographic matching between the magnetic film and the dielectric growth template are discussed where dramatic changes of the functional properties of these nanoscale structures demonstrate that the interfaces have a deleterious effect on the properties.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"12 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72585095","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297809
G. Dale, J. McLaughlin, M. Conway
Barium titanate has been doped with rare earth oxides (Erbium, Holmium, Gadolinium and Yttrium) in an attempt to understand the effect on the reliability of the dielectric material for multilayer capacitor applications. The morphology of the samples used was characterized using scanning electron microscopy (SEM) with EDAX used to confirm the presence of each rare earth ions. It is suggested that incorporation of rare earth ions into the BaTiO3 is as a result of ionic radius, resulting in varying grain growth and electrical properties. The change in reliability and electrical properties of the capacitor can be attributed to overall distribution of rare earth oxides and their occupation site within the dielectric.
{"title":"An investigation into the electrical properties of doped barium titanate using EIS","authors":"G. Dale, J. McLaughlin, M. Conway","doi":"10.1109/ISAF.2012.6297809","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297809","url":null,"abstract":"Barium titanate has been doped with rare earth oxides (Erbium, Holmium, Gadolinium and Yttrium) in an attempt to understand the effect on the reliability of the dielectric material for multilayer capacitor applications. The morphology of the samples used was characterized using scanning electron microscopy (SEM) with EDAX used to confirm the presence of each rare earth ions. It is suggested that incorporation of rare earth ions into the BaTiO3 is as a result of ionic radius, resulting in varying grain growth and electrical properties. The change in reliability and electrical properties of the capacitor can be attributed to overall distribution of rare earth oxides and their occupation site within the dielectric.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"4 4","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72591787","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 : 2012-07-09DOI: 10.1109/ISAF.2012.6297743
Wen-Chih Chang, An-Bang Wang, Chih-Kung Lee, W. Ko, Han-Lung Chen, Chih-Ting Lin
In recent years, the optical properties of piezoelectric materials have attracted much interest. We developed a new photoconductive piezoelectric material by integrating P(VDF-TrFE) and TiOPc to create a new composite. This new composite material not only retains good piezoelectric efficiency but also possesses high sensitivity to visible light. We analyzed photoconductivity before and after light illumination at different wavelengths to confirm the potential benefits and advantages of this newly developed material. An equivalent circuit of a P(VDF-TrFE) & TiOPc composite was simulated and verified experimentally. Our results show that our P(VDF-TrFE) & TiOPc composite can be applied to microfluidic chips for particle manipulation. The experimental results establish the basic material properties and the electrical model for future modification.
{"title":"Development of a photoconductive piezoelectronic material from composite of P(VDF-TrFE) and TiOPc","authors":"Wen-Chih Chang, An-Bang Wang, Chih-Kung Lee, W. Ko, Han-Lung Chen, Chih-Ting Lin","doi":"10.1109/ISAF.2012.6297743","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297743","url":null,"abstract":"In recent years, the optical properties of piezoelectric materials have attracted much interest. We developed a new photoconductive piezoelectric material by integrating P(VDF-TrFE) and TiOPc to create a new composite. This new composite material not only retains good piezoelectric efficiency but also possesses high sensitivity to visible light. We analyzed photoconductivity before and after light illumination at different wavelengths to confirm the potential benefits and advantages of this newly developed material. An equivalent circuit of a P(VDF-TrFE) & TiOPc composite was simulated and verified experimentally. Our results show that our P(VDF-TrFE) & TiOPc composite can be applied to microfluidic chips for particle manipulation. The experimental results establish the basic material properties and the electrical model for future modification.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"94 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74630892","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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