Despite metal halide perovskite nanocrystals (NCs) having shown great promise for light-emitting applications, their performance is often limited by surface defects and unstable ligand environments that promote nonradiative recombination. To overcome these challenges, the influence of countercations in tetrafluoroborate (BF4–) salts on the surface passivation and photophysical properties of CsPbBr3 NCs was systematically investigated. A series of BF4– salts with inorganic-, aromatic-, and phosphorus-based cations were examined to correlate countercation chemistry with surface reactivity. Structural analyses revealed that most BF4– salts efficiently removed metallic Pb0 defects while maintaining the phase integrity. NH4BF4 promoted the oriented attachment of nanocubes into nanowires, whereas tritylium BF4 induced the partial decomposition of BF4– into BF3 and F–, forming Pb–F bonds that stabilized the surface and reduced trap densities. In contrast, 2,4,6-triphenylpyrylium BF4 triggered a Katritzky reaction with oleylamine, leading to aggregation and Cs4PbBr6 formation. Photophysical measurements showed enhanced photoluminescence and increased trap activation energies for most BF4–-treated NCs due to suppressed nonradiative recombination. Light-emitting diodes incorporating sodium and tritylium BF4-treated NCs exhibited improved emission stability and electroluminescence. These findings highlight countercation-dependent surface chemistry as a key factor in achieving efficient defect passivation and stable perovskite optoelectronic performance.
{"title":"Modulating the Photoluminescence of CsPbBr3 Nanocrystals via Cation Variation in BF4– Salts","authors":"Min-Gi Jeon,Artavazd Kirakosyan,Subin Yun,Chang-Yeon Kim,Dung Khac Nguyen,Seonu Lee,Huong Thi Cam Le,Sunhyun Nam,Jihoon Choi","doi":"10.1021/acs.chemmater.5c03031","DOIUrl":"https://doi.org/10.1021/acs.chemmater.5c03031","url":null,"abstract":"Despite metal halide perovskite nanocrystals (NCs) having shown great promise for light-emitting applications, their performance is often limited by surface defects and unstable ligand environments that promote nonradiative recombination. To overcome these challenges, the influence of countercations in tetrafluoroborate (BF4–) salts on the surface passivation and photophysical properties of CsPbBr3 NCs was systematically investigated. A series of BF4– salts with inorganic-, aromatic-, and phosphorus-based cations were examined to correlate countercation chemistry with surface reactivity. Structural analyses revealed that most BF4– salts efficiently removed metallic Pb0 defects while maintaining the phase integrity. NH4BF4 promoted the oriented attachment of nanocubes into nanowires, whereas tritylium BF4 induced the partial decomposition of BF4– into BF3 and F–, forming Pb–F bonds that stabilized the surface and reduced trap densities. In contrast, 2,4,6-triphenylpyrylium BF4 triggered a Katritzky reaction with oleylamine, leading to aggregation and Cs4PbBr6 formation. Photophysical measurements showed enhanced photoluminescence and increased trap activation energies for most BF4–-treated NCs due to suppressed nonradiative recombination. Light-emitting diodes incorporating sodium and tritylium BF4-treated NCs exhibited improved emission stability and electroluminescence. These findings highlight countercation-dependent surface chemistry as a key factor in achieving efficient defect passivation and stable perovskite optoelectronic performance.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"39 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146152427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Spinal cord injury (SCI) repair has been a great challenge worldwide because of its complex regeneration mechanisms and limited self-healing. The biomimetic construction of a bioactive scaffold represents a promising direction for SCI repair. Inspired by the efficient self-healing properties of the neonatal spinal cord, this study developed a neonatal spinal-cord-like scaffold (NSLS) aimed at regulating SCI repair at different stages. The NSLS features a neonatal spinal cord matrix, multilevel biomimetic structures, and matching mechanical strength via personalized laser processing and dual-network cross-linking. The microenvironments of the NSLS activate energy metabolism, synaptic formation, and the gliogenesis of neural stem cells (NSCs). Notably, the NSLS could achieve rapid hemostasis and integration with the host spinal cord, facilitating nutrient infiltration and establishing a stable connection in the early stage. Furthermore, NSCs loaded with NSLS (NSLT) promoted nerve repair by promoting microglial M2 polarization to decrease local inflammatory responses in the intermediate stage. Finally, axons grow directionally within the channels and form new connections to enhance neural repair and functional recovery in the late stage. Therefore, NSLT could significantly enhance nerve regeneration and functional recovery after SCI via stage-specific regulation.
{"title":"Neonatal Spinal-Cord-Like Scaffold with Hierarchical Structural and Neurogenetic Microenvironments for Spinal Cord Injury Repair","authors":"Baoshuai Bai,Jianhao Wang,Linlin Jiang,Chenbo Zou,Shuo Liu,Zhangyang Qi,Chi Zhang,Zhen Li,Ruizhi Zhang,Yanhan Liu,Gang Lu,Xingqi Song,Chunlin Li,Hua Zhao,Ning Ran,Guangdong Zhou,Xiaohong Kong,Partick Shu Hang Yung,Dong Lei,Shiqing Feng,Hengxing Zhou","doi":"10.1021/acsnano.5c07071","DOIUrl":"https://doi.org/10.1021/acsnano.5c07071","url":null,"abstract":"Spinal cord injury (SCI) repair has been a great challenge worldwide because of its complex regeneration mechanisms and limited self-healing. The biomimetic construction of a bioactive scaffold represents a promising direction for SCI repair. Inspired by the efficient self-healing properties of the neonatal spinal cord, this study developed a neonatal spinal-cord-like scaffold (NSLS) aimed at regulating SCI repair at different stages. The NSLS features a neonatal spinal cord matrix, multilevel biomimetic structures, and matching mechanical strength via personalized laser processing and dual-network cross-linking. The microenvironments of the NSLS activate energy metabolism, synaptic formation, and the gliogenesis of neural stem cells (NSCs). Notably, the NSLS could achieve rapid hemostasis and integration with the host spinal cord, facilitating nutrient infiltration and establishing a stable connection in the early stage. Furthermore, NSCs loaded with NSLS (NSLT) promoted nerve repair by promoting microglial M2 polarization to decrease local inflammatory responses in the intermediate stage. Finally, axons grow directionally within the channels and form new connections to enhance neural repair and functional recovery in the late stage. Therefore, NSLT could significantly enhance nerve regeneration and functional recovery after SCI via stage-specific regulation.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"156 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146152433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juyoung Kim,Ruzan Sokhoyan,Minkyoon Yi,Sangjun Han,Harry A. Atwater,Min Seok Jang
Active photonic systems comprising arrays of active metasurfaces─arrays of tunable resonators─offer dynamic wavefront control at subwavelength scales. Transmissive metasurfaces are an essential requirement in cascaded arrays of metasurfaces and enable integration with chip-scale light sources and detectors. However, most existing active phase control metasurface designs are reflective due to fundamental limitations in single-resonance transmissive architectures, which typically exhibit a transmission null at resonance and restrict transmitted phase shifts to 0–180°. We report an approach to overcome these constraints by introducing additional diffraction ports in reflection while maintaining a single transmission port. This configuration enables continuous 0–360° phase tuning in transmission using a single resonance while avoiding the transmission zero. Moreover, we analytically demonstrate using temporal coupled-mode theory that this approach supports a spectrally flat transmission amplitude across the entire phase range─an effect previously observed only in multiresonant (Kerker-type) systems. Unlike those, our design allows dynamic phase control with a single resonance and a constant transmission. To validate our theory, we present proof-of-concept active metasurfaces using lithium niobate as the tunable material. Two designs are explored via full-wave simulations: one using high-Q germanium Mie resonators at 3 μm, achieving ∼250° tunable phase shift with constant transmission amplitude ∼0.45; and another using silicon resonators at telecom wavelengths, demonstrating ∼300° phase shift with amplitude ∼0.4. Both approach the theoretical transmission bound of 0.5. Our approach enables compact, dynamically tunable transmissive metasurfaces with near-ideal phase and amplitude characteristics, paving the way for integrated, reconfigurable metasurfaces.
{"title":"Overcoming Barriers to Dynamic Phase-Only Modulation in Transmissive Metasurfaces via Diffraction Control","authors":"Juyoung Kim,Ruzan Sokhoyan,Minkyoon Yi,Sangjun Han,Harry A. Atwater,Min Seok Jang","doi":"10.1021/acsnano.5c13223","DOIUrl":"https://doi.org/10.1021/acsnano.5c13223","url":null,"abstract":"Active photonic systems comprising arrays of active metasurfaces─arrays of tunable resonators─offer dynamic wavefront control at subwavelength scales. Transmissive metasurfaces are an essential requirement in cascaded arrays of metasurfaces and enable integration with chip-scale light sources and detectors. However, most existing active phase control metasurface designs are reflective due to fundamental limitations in single-resonance transmissive architectures, which typically exhibit a transmission null at resonance and restrict transmitted phase shifts to 0–180°. We report an approach to overcome these constraints by introducing additional diffraction ports in reflection while maintaining a single transmission port. This configuration enables continuous 0–360° phase tuning in transmission using a single resonance while avoiding the transmission zero. Moreover, we analytically demonstrate using temporal coupled-mode theory that this approach supports a spectrally flat transmission amplitude across the entire phase range─an effect previously observed only in multiresonant (Kerker-type) systems. Unlike those, our design allows dynamic phase control with a single resonance and a constant transmission. To validate our theory, we present proof-of-concept active metasurfaces using lithium niobate as the tunable material. Two designs are explored via full-wave simulations: one using high-Q germanium Mie resonators at 3 μm, achieving ∼250° tunable phase shift with constant transmission amplitude ∼0.45; and another using silicon resonators at telecom wavelengths, demonstrating ∼300° phase shift with amplitude ∼0.4. Both approach the theoretical transmission bound of 0.5. Our approach enables compact, dynamically tunable transmissive metasurfaces with near-ideal phase and amplitude characteristics, paving the way for integrated, reconfigurable metasurfaces.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"18 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146152434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Tarsi,N. Manca,L. Pellegrino,V. Pierron,C. Bernini,B. Guillet,S. Flament,G. Brasse,U. Lüders,Z. Wang,D. G. Schlom,D. Marré,L. Méchin
We realize double-clamped beams made of La2/3Sr1/3MnO3/CaTiO3/SrTiO3 [LSMO(45 nm)/CTO/STO(20 nm)] thin films grown on silicon substrates by pulsed laser deposition (PLD) and molecular beam epitaxy (MBE). Microbridges having a width of 5 μm and length from 50 to 250 μm are released from the silicon substrate by reactive ion etching, resulting in a suspended oxide heterostructure. The thickness of the CTO buffer layer varies in the 0–14 nm range to tune the tensile stress of the microbridges. For thicker CTO, we observe an increase of the fabrication yield and a shift of the transverse curvature of the microbridges, related to the out-of-plane strain gradient, from positive to negative. The mechanical quality factors of these resonators are above 105, and it is associated with a tensile stress of about 500 MPa. Our results indicate that the use of dual oxide buffer layers, with mismatched lattice parameters, is an effective route to control the epitaxial strain in oxide-based mechanical resonators integrated on silicon and to achieve high stress and a mechanical Q factor.
{"title":"Tuning Strain by Varying CaTiO3 Thickness in Heteroepitaxially Grown La2/3Sr1/3MnO3 Double-Clamped Resonators on Silicon","authors":"G. Tarsi,N. Manca,L. Pellegrino,V. Pierron,C. Bernini,B. Guillet,S. Flament,G. Brasse,U. Lüders,Z. Wang,D. G. Schlom,D. Marré,L. Méchin","doi":"10.1021/acsami.5c21849","DOIUrl":"https://doi.org/10.1021/acsami.5c21849","url":null,"abstract":"We realize double-clamped beams made of La2/3Sr1/3MnO3/CaTiO3/SrTiO3 [LSMO(45 nm)/CTO/STO(20 nm)] thin films grown on silicon substrates by pulsed laser deposition (PLD) and molecular beam epitaxy (MBE). Microbridges having a width of 5 μm and length from 50 to 250 μm are released from the silicon substrate by reactive ion etching, resulting in a suspended oxide heterostructure. The thickness of the CTO buffer layer varies in the 0–14 nm range to tune the tensile stress of the microbridges. For thicker CTO, we observe an increase of the fabrication yield and a shift of the transverse curvature of the microbridges, related to the out-of-plane strain gradient, from positive to negative. The mechanical quality factors of these resonators are above 105, and it is associated with a tensile stress of about 500 MPa. Our results indicate that the use of dual oxide buffer layers, with mismatched lattice parameters, is an effective route to control the epitaxial strain in oxide-based mechanical resonators integrated on silicon and to achieve high stress and a mechanical Q factor.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"313 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146152460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-11DOI: 10.1016/j.apsusc.2026.166294
Gijin Kim, Purun-hanul Kim, Suk Gyu Hahm, Myongjong Kwon, Byungha Park, Changho Hong, Seungwu Han
{"title":"A computational study for screening high-selectivity inhibitors in area-selective atomic layer deposition on amorphous surfaces","authors":"Gijin Kim, Purun-hanul Kim, Suk Gyu Hahm, Myongjong Kwon, Byungha Park, Changho Hong, Seungwu Han","doi":"10.1016/j.apsusc.2026.166294","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.166294","url":null,"abstract":"","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"16 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146152801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-11DOI: 10.1016/j.jallcom.2026.186790
Raad Omar, Jordan Noronha, Shenglu Lu, Abduladheem Almalki, Tiantain Wang, Elmira Sharabian, Mahyar Khorasani, Milan Brandt, Ma Qian
{"title":"Ultra-Thin-Walled Ti-6242 via Laser-based Powder Bed Fusion: Manufacturability Framework and Defect Suppression","authors":"Raad Omar, Jordan Noronha, Shenglu Lu, Abduladheem Almalki, Tiantain Wang, Elmira Sharabian, Mahyar Khorasani, Milan Brandt, Ma Qian","doi":"10.1016/j.jallcom.2026.186790","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186790","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"86 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-11DOI: 10.1038/s41563-025-02478-2
Tom P. A. van der Pol, Dongxun Lyu, Zoé Truyens, Vincent Lemaur, Demetra Tsokkou, Arianna Magni, Chiara Musumeci, Han-Yan Wu, Junpeng Ji, David Cornil, Chi-Yuan Yang, Scott T. Keene, Gabriele D’Avino, Alberto Salleo, Natalie Banerji, Clare Grey, David Beljonne, Simone Fabiano
Controlling ion–polymer interactions in organic mixed ionic-electronic conductors is crucial for optimizing device performance in applications ranging from bioelectronics and energy storage to photonics. Achieving this requires a molecular-level understanding of how ion uptake, solvation and polymer structure evolve during electrochemical doping. Here using a multimodal operando approach, we uncover an unexpected response in the prototypical n-type ladder polymer poly(benzimidazobenzophenanthroline) (BBL) on doping with protic cations such as ammonium. At high doping levels, strong ion–polymer interactions (primarily hydrogen bonding) between cations and the BBL backbone promote charge localization and disrupt ion hydration, leading to a pronounced reduction in mass and thickness. Operando 2H NMR identifies water expulsion, rather than ion removal, as the origin of this deswelling. Our combined experimental and modelling results reveal a previously unobserved regime of ion–polymer coupling in organic mixed ionic-electronic conductors, establishing a framework for material design and applications that span (bio-)electronics to photonics.
{"title":"Cation–polymer interactions drive water expulsion and deswelling in n-type ladder organic mixed conductors","authors":"Tom P. A. van der Pol, Dongxun Lyu, Zoé Truyens, Vincent Lemaur, Demetra Tsokkou, Arianna Magni, Chiara Musumeci, Han-Yan Wu, Junpeng Ji, David Cornil, Chi-Yuan Yang, Scott T. Keene, Gabriele D’Avino, Alberto Salleo, Natalie Banerji, Clare Grey, David Beljonne, Simone Fabiano","doi":"10.1038/s41563-025-02478-2","DOIUrl":"https://doi.org/10.1038/s41563-025-02478-2","url":null,"abstract":"Controlling ion–polymer interactions in organic mixed ionic-electronic conductors is crucial for optimizing device performance in applications ranging from bioelectronics and energy storage to photonics. Achieving this requires a molecular-level understanding of how ion uptake, solvation and polymer structure evolve during electrochemical doping. Here using a multimodal operando approach, we uncover an unexpected response in the prototypical n-type ladder polymer poly(benzimidazobenzophenanthroline) (BBL) on doping with protic cations such as ammonium. At high doping levels, strong ion–polymer interactions (primarily hydrogen bonding) between cations and the BBL backbone promote charge localization and disrupt ion hydration, leading to a pronounced reduction in mass and thickness. Operando 2H NMR identifies water expulsion, rather than ion removal, as the origin of this deswelling. Our combined experimental and modelling results reveal a previously unobserved regime of ion–polymer coupling in organic mixed ionic-electronic conductors, establishing a framework for material design and applications that span (bio-)electronics to photonics.","PeriodicalId":19058,"journal":{"name":"Nature Materials","volume":"31 1","pages":""},"PeriodicalIF":41.2,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146152242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In monolayer semiconductors, excitons confined by strain-induced potential traps are promising candidates for on-chip single-photon sources. For these quantum emitters, achieving broadband tunability while preserving high brightness is crucial for quantum information processing and communication, but remains challenging in aligning the emitter energy with optical resonances. Here, we demonstrate resonant tuning of localized exciton emission in monolayer WSe2 using an Au nanocube-on-mirror nanocavity. The design enables simultaneous strain-induced exciton energy tuning and Purcell-enhanced emission. By adjusting the cavity gap, it allows precise spectral alignment of the localized exciton with the plasmonic resonance. We observe a record-large redshift over 240 meV in localized exciton energy. Compared with the conventional approach, a 22-fold enhancement in emission intensity is achieved due to the spectral, spatial, and polarization matching between the localized exciton and plasmons. Our findings establish a robust strategy for developing high-performance nonclassical light sources, facilitating the development of scalable quantum applications.
{"title":"Resonance Tuning of Localized Excitons via a Plasmonic Nanocavity","authors":"Qifa Wang,Guodong Xue,Cheng Ji,Yuxin Li,Chenyang Li,Liping Hou,Xiaobing Zheng,Qinghong Yu,Chaojie Ma,Xuetao Gan,Kaihui Liu,Jianlin Zhao,Fajun Xiao","doi":"10.1021/acsnano.5c21481","DOIUrl":"https://doi.org/10.1021/acsnano.5c21481","url":null,"abstract":"In monolayer semiconductors, excitons confined by strain-induced potential traps are promising candidates for on-chip single-photon sources. For these quantum emitters, achieving broadband tunability while preserving high brightness is crucial for quantum information processing and communication, but remains challenging in aligning the emitter energy with optical resonances. Here, we demonstrate resonant tuning of localized exciton emission in monolayer WSe2 using an Au nanocube-on-mirror nanocavity. The design enables simultaneous strain-induced exciton energy tuning and Purcell-enhanced emission. By adjusting the cavity gap, it allows precise spectral alignment of the localized exciton with the plasmonic resonance. We observe a record-large redshift over 240 meV in localized exciton energy. Compared with the conventional approach, a 22-fold enhancement in emission intensity is achieved due to the spectral, spatial, and polarization matching between the localized exciton and plasmons. Our findings establish a robust strategy for developing high-performance nonclassical light sources, facilitating the development of scalable quantum applications.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"53 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146152429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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