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Bioinspired mineral-in-shell nanoarchitectonics:Functional empowerment of mineral precursors for guiding intradentinal mineralization

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Nano Research 2024年第5期17卷 4338-4349页

作者： Xiaoran Zheng Yang Liu Mingjing Li Yuyan Li Wanshan Gao Rongmin Qiu Jiaqi Xing Jiaojiao Yang Yantao Chen Xinyuan Xu Mingming Ding Jun Luo Jianshu Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China College of Stomatology Hospital of Stomatology Guangxi Medical UniversityGuangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and ReconstructionGuangxi Clinical Research Center for Craniofacial DeformityGuangxi Key Laboratory of Oral and Maxillofacial Surgery Disease TreatmentGuangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious DiseasesNanning 530021China State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041China Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Med-X Center for Material Sichuan UniversityChengdu 610041China

Effective mineralization of biological structures poses a significant challenge in hard tissue engineering as it necessitates overcoming geometric complexities and multistep biomineralization processes.In this regard,we propose“mineral-in-shell nanoarchitectonics”,inspired by the nanostructure of matrix vesicles,which can influence multiple mineralization pathways.Our nanostructural design empowers mineral precursors with tailorable properties through encapsulating amorphous calcium phosphate within a multifunctional tannic acid(TA)and silk fibroin(SF)nanoshell.The bioinspired nanosystem facilitates efficient recruitment of mineral precursors throughout the dentin structures,followed by large-scale intradentinal mineralization both in vitro and in vivo,which provides persistent protection against external stimuli.Theoretical simulations combined with experimental studies attribute the success of intradentinal mineralization to the TA-SF nanoshell,which exhibits a strong affinity for the dentin structure,stabilizing amorphous precursors and thereby facilitating concomitant mineral formation.Overall,this bioinspired mineral-in-shell nanoarchitectonics shows a promising prospect for hard tissue repair and serves as a blueprint for next-generation biomineralization-associated materials.

关键词： mineral-in-shell nanohybrids self-assembly biomineralization dentinal tubule occlusion dental hypersensitivity

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Selective electrocatalytic reduction of CO_(2) to formate via carbon-shell-encapsulated In_(2)O_(3) nanoparticles/graphene nanohybrids

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Journal of Materials Science & Technology 2022年第26期121卷 220-226页

作者： Yidu Wang Jingnan Ding Jun Zhao Jiajun Wang Xiaopeng Han Yida Deng Wenbin Hu Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) Tianjin Key Laboratory of Composite and Functional MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhouBinhai New City 350207China

Constructing nanohybrids with a synergistic effect using multi-components and specific micro/nanostructures can significantly enhance their electrocatalytic activity.In this work,we fabricated an In_(2)O_(3)■NC@GO nanohybrid,in which In_(2)O_(3)nanoparticles(NPs)were encapsulated by an N-doped carbon(NC)shell and supported on graphene.The multi-components in In_(2)O_(3)■NC@GO synergistically optimize the structural and electronic properties of the material.The particle size and dispersion of In_(2)O_(3)NPs were optimized owing to the separation effect of the amorphous NC shell and graphene support.This separation effect exposes more number of active sites for the electrochemical reaction.Abundant oxygen vacancies exist in In_(2)O_(3),leading to a stronger ability for the adsorption and activation of CO.The NC shell inhibits the direct contact between the electrolyte and In_(2)O_(3),which significantly suppresses competitive Hevolution.The charge transfer during the electrocatalysis process is also effectively enhanced due to the carbon components.The synergistic effect of multi-components in the In_(2)O_(3)■NC@GO sample results in a significantly improved COreduction reaction performance with a high HCOOFaradic efficiency(FE)of 91.2%and a current density of 40.38 m A cmat–0.8 V obtained using a flow cell.The present work demonstrates that rationally designing nanohybrids with multifunctional components is an effective strategy for optimizing the structural and electrocatalytic properties of materials for energy conversion.

关键词： In_(2)O_(3) CO_(2)reduction electrocatalyst Oxygen vacancies N-doped carbon nanohybrids

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“Nanospace engineering”by the growth of nano metal-organic framework on dendritic fibrous nanosilica(DFNS)and DFNS/gold hybrids

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Nano Research 2020年第3期13卷 775-784页

作者： Ngoc Minh Tran Soeun Jung Hyojong Yoo Department of Materials Science and Chemical Engineering Hanyang UniversityAnsanGyeonggi-do15588Republic of Korea

Advanced hybrid nanomaterials(nanohybrids)with unique tailored morphologies and compositions have been used for the target-oriented catalysts due to the structural or supportive properties of each moiety and the synergistic properties of the individual components.The rational design and development of nanohybrids by integrating highly porous silica into a nano metal-organic framework(NMOF)are expected to enable unique nanospace engineering in the resulting systems to optimize their utility in the target areas.Herein,we report the design and fabrication of advanced nanohybrids composed of dendritic fibrous nanosilica(DFNS)and DFNS/gold(DFNS/Au)hybrids as the core and zinc-based NMOF(Zn-NMOF)as the shell(DFNS@Zn-NMOF)through a solution-based approach.The combined fibrous morphology of DFNS and micropores of NMOF can be directly employed for nanospace engineering in the resulting multi-compositional and hierarchical systems in a controllable manner.The DFNS/Au dots@Zn-NMOF nanohybrid shows improved catalytic performance in the Knoevenagel condensation reaction,attributed mainly to the cooperative effect stemming from the suitably organized configurations of each component.

关键词： nanohybrids nanospace engineering dendritic fibrous nanosilica nano metal-organic framework cooperative catalytic performance

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TiO_2 nanocrystals/graphene hybrids with enhanced Li-ion storage performance

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Journal of Energy Chemistry 2014年第3期23卷 403-410页

作者： Qingqing Zhang Rong Li Mengmeng Zhang Bianli Zhang Xinglong Gou Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal University

TiO2 nanocrystals/graphene hybrids（TiO2-G） with ultrafine TiO2 nanocrystals（7 nm in size） conformally coated on ultrathin graphene nanosheets（ 2 layers thick） were successfully prepared via a facile one-pot solvothermal route under mediated conditions.With the feature of large surface area,abundant mesopores and high thermal stability,the TiOi-G nanohybrids exhibited large reversible Li-ion storage capacity with excellent cycling stability（629 mAh·g-1 after 400 cycles at a current of 60 mA·g-1） and good rate capability（184 mAh·g-1 at a current density of 3 A·g-1） due to the synergetic effects and strong interactions between the components,showing great promise in applications for advanced energy storage devices.

关键词： titania graphene nanohybrids anode materials rechargeable Li-ion battery

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Facile fabrication of porous pure and Ag nanoparticle-doped poly(4-vinylpyridine) films at the liquid-liquid interfaces

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Chinese Chemical Letters 2011年第7期22卷 867-870页

作者： Zhi Bin Ren Jiang Liu Yu Ping Chen Meng Chen Dong Jin Qian Department of Chemistry Fudan University Shanghai 200433 China

We reported an interfacial self-assembly of regularly layered porous poly（4-vinylpyridine）（P4VP） films at the interfaces of water-chloroform or -dichloroethane. The porous diameters were in the range from hundred nanometers to several micrometers. It was revealed that formation of such kind of porous materials was solvent dependent. Moreover, cyclic Ag nanoparticles could be grown in the porous P4VP films to form Ag-P4VP nanohybrids under radiation.

关键词： Self-assembly Interface Porous films nanohybrids

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Application of naturalβ-glucans as biocompatible functional nanomaterials

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Food Science and Human Wellness 2019年第4期8卷 315-319页

作者： Xiaojie Li Peter Chi Keung Cheung Food and Nutritional Sciences School of Life SciencesThe Chinese University of Hong KongHong KongChina

Naturally-occurringβ-glucans are mostly investigated for their antitumor activity and immunomodulatory property.They have been widely regarded as a natural source for functional foods and pharmaceuticals.However,the physico-chemically stable and biocompatible properties ofβ-glucans are rarely explored as a coating material for nanomaterials to overcome the problems of aggregation and cytotoxicity.This article reviews on the exploration ofβ-glucans,in particular those derived from mushrooms,as a natural coating material to modify the surface properties of bioactive substances as a relatively simple and cost-effective strategy to produce stable and biocompatible nanohybrids used for biopharmaceutical use.It is envisaged that suchβ-glucan-based coating method will provide new opportunities to design biocompatible functional nanomaterials for wider clinical applications.

关键词： β-Glucans Biocompatibility Biopharmaceuticals nanohybrids

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TiO2 nanotube Array for in situ Formation of p-n Heterojunctions

TiO2 nanotube Array for in situ Formation of p-n Heterojunct...

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第18届国际真空大会

作者： D. Wang a * L. Liu a F. Zhoub a Max Planck Institute of Microstructure Physics Weinberg 2 D-06120 Halle Germany b Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 73000 China

Anatase TiO2 is the well known as a n-type semiconductor, and has gained paramount research attentions for several decades due to its additional photoresponses that can be used for photocatalysis and most recently in photoelectrical conversion in solar cells etc. Anodized TiO2 nanotube （NT） arrays are discovered and recognized with improved properties in photocatalysis, sensing, photoelectrolysis, and photovoltaics etc. However, it is difficult to use these TiO2 NTs as template to electrochemically deposit other p type nanomaterials in the NTs because of the defects on the top surface. In the present work, we introduced a new nanoporous TiO2 NTs which can be easily utilized as the building block to form, via simple electrodeposition, ordered heterojunctions with a number of other materials of potential interests, including conducting polymers （polypyrrole, poly3-hexylthiophene）, inorganic semiconducting materials （CdS） and other semiconductors. Of particular interest is that the synthesized TiO2 NT-nanowires （nanotube） nanohydrids are highly flexible after peel-off from mother substrates, which is otherwise impossible with pure TiO2 NTs that are normally very fragile.

关键词： TiO2 nanotubes anodization nanohybrids

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