The mechanics of structural ceramics,especially the toughness,are crucial to their service reliability and need to be continuously optimized.Inspired by the“brick-mortar”structure and further adjusting the microstru...The mechanics of structural ceramics,especially the toughness,are crucial to their service reliability and need to be continuously optimized.Inspired by the“brick-mortar”structure and further adjusting the microstructure of“mortar”on the interface,ceramic with strength and toughness up to 444.16 MPa and 13.79 MPa⋅m^(1/2) is constructed by hot pressed sintering with alumina(Al_(2)O_(3))as brick and vertical graphene(VG)with active atomic edges as mortar.Relying on the covalent interface between VG grown in-situ and Al_(2)O_(3),the sliding of Al_(2)O_(3)links the shear-deformation process of the crosslinked and interlocked nanointerface formed by VG,making the VG-enhanced Al_(2)O_(3)ceramics(AVG)obtain super toughness.Moreover,the structure of interlocked VG-nanointerface exhibits an excellent high-temperature resistance,which makes AVG still show the excellent strength of 437.66 MPa and toughness of 11.16 MPa⋅m^(1/2)after heat treatment at 1500℃for 100 h and they are respective 2.51 times and 3.18 times higher than Al_(2)O_(3)in the same condition.This work provides a new thought for the preparation of high-strength,ultra-tough and high-temperature mechanical stable ceramics.展开更多
The development of yarn-free cellulose fibers from natural biomass provides a low-energy and environmentally conscious alternative for producing functional textiles.This study introduced a method for producing yarn-fr...The development of yarn-free cellulose fibers from natural biomass provides a low-energy and environmentally conscious alternative for producing functional textiles.This study introduced a method for producing yarn-free cellulose fibers from the bast of Broussonetia papyrifera(pa-per mulberry),a fast-growing plant that does not require pesticides.The fibers were extracted using a mild alkaline treatment that preserved their alignment and allowed them to be knitted di-rectly without traditional spinning.A coating of suberin,obtained from cork bark waste(Quercus variabilis),was applied using ethanol dispersion and fixed by heating at 110℃.The coating im-proved the fiber’s antibacterial performance,moisture response,and mechanical strength(tensile strength:0.43 GPa;Young’s modulus:6.4 GPa),while keeping the material flexible and washable.The suberin layer could be removed and reused through a recycling process involving ionic liq-uids,allowing over 95%recovery after multiple cycles.A life cycle assessment showed that this fiber system had a lower environmental impact compared to conventional synthetic textile fibers.Overall,this work provided a practical and recyclable approach to making functional textiles from natural plant materials.展开更多
A negative differential mobility (NDM) of the two-dimensional carrier-gas against some proper external regulator allowing for gradual controlled modification of the nanointerfacial environment tends to occur as interw...A negative differential mobility (NDM) of the two-dimensional carrier-gas against some proper external regulator allowing for gradual controlled modification of the nanointerfacial environment tends to occur as interwoven with nanophotonic device functionality. In this work, several instances, in our two-decade principal research, of both experimental observation and conceptual prediction concerning nanophotonics NDM are reconsidered towards outlining a global potential for the appearance of the effect.展开更多
The optoelectronic reliability of representative radioactivity-exposed nanophotodetectors and the degree of functionally tolerable radioactivity-induced responsivity de-emphasis, against increasing cumulative radioact...The optoelectronic reliability of representative radioactivity-exposed nanophotodetectors and the degree of functionally tolerable radioactivity-induced responsivity de-emphasis, against increasing cumulative radioactivity-dose, is notionally considered and modelled, with a view towards experimental findings concerning p-i-n photosensors being exposed to regulated successive (α, β)-particle bombardments.展开更多
The resistance and immune evasion of methicillin-resistant Staphylococcus aureus(MRSA)in biofilms are the culprits behind persistent infections.There is an urgent need for safe and effective antibacterial strategies t...The resistance and immune evasion of methicillin-resistant Staphylococcus aureus(MRSA)in biofilms are the culprits behind persistent infections.There is an urgent need for safe and effective antibacterial strategies to address MRSA and biofilm-related infections.Herein,we propose the development of an allin-one optical microfiber that integrates rapid quantitative analysis with synergistic antimicrobial therapy for deep-seated MRSA in biofilms.The prepared interfacial-functionalized sensor can be used for quantitative analysis of MRSA in clinical whole-blood samples with low volumes(10μL),reducing the detection time to 30 min and effectively preventing false-positive and false-negative results.The sensor can also be used for multimode antimicrobial therapy.This one-time treatment accelerates recovery and prevents recurrence through the synergistic effect of photothermal therapy,photodynamic therapy,and the antibacterial effect of Ag^(+),as well as the activation of immune memory.The therapy is localized with relatively low hyperthermia and does not cause harm to the surrounding healthy tissues.The integration of therapeutic agents onto the optical microfiber precludes their enrichment in other organs.The light guided through the optical fiber can reach deep-seated biofilms,which other light sources fail to reach.This work is promising for the clinical diagnosis and treatment of deep-seated infections.展开更多
基金supported by the National Natural Science Foundation of China under Grant Nos.52222204,52172103,52293371,52072304,and Natural Science Basic Research Program in Shaanxi(2022JC-25).
文摘The mechanics of structural ceramics,especially the toughness,are crucial to their service reliability and need to be continuously optimized.Inspired by the“brick-mortar”structure and further adjusting the microstructure of“mortar”on the interface,ceramic with strength and toughness up to 444.16 MPa and 13.79 MPa⋅m^(1/2) is constructed by hot pressed sintering with alumina(Al_(2)O_(3))as brick and vertical graphene(VG)with active atomic edges as mortar.Relying on the covalent interface between VG grown in-situ and Al_(2)O_(3),the sliding of Al_(2)O_(3)links the shear-deformation process of the crosslinked and interlocked nanointerface formed by VG,making the VG-enhanced Al_(2)O_(3)ceramics(AVG)obtain super toughness.Moreover,the structure of interlocked VG-nanointerface exhibits an excellent high-temperature resistance,which makes AVG still show the excellent strength of 437.66 MPa and toughness of 11.16 MPa⋅m^(1/2)after heat treatment at 1500℃for 100 h and they are respective 2.51 times and 3.18 times higher than Al_(2)O_(3)in the same condition.This work provides a new thought for the preparation of high-strength,ultra-tough and high-temperature mechanical stable ceramics.
基金supported by the China Association for Science and Technology Youth Talent Support Engineering Doctoral Program,the China Scholarship Council(CSC),the Fundamental Research Funds for the Central Universities(No.2572024AW49)the Science and Technology Extension Project of the State Forestry Administration of China(No.070-41319503).
文摘The development of yarn-free cellulose fibers from natural biomass provides a low-energy and environmentally conscious alternative for producing functional textiles.This study introduced a method for producing yarn-free cellulose fibers from the bast of Broussonetia papyrifera(pa-per mulberry),a fast-growing plant that does not require pesticides.The fibers were extracted using a mild alkaline treatment that preserved their alignment and allowed them to be knitted di-rectly without traditional spinning.A coating of suberin,obtained from cork bark waste(Quercus variabilis),was applied using ethanol dispersion and fixed by heating at 110℃.The coating im-proved the fiber’s antibacterial performance,moisture response,and mechanical strength(tensile strength:0.43 GPa;Young’s modulus:6.4 GPa),while keeping the material flexible and washable.The suberin layer could be removed and reused through a recycling process involving ionic liq-uids,allowing over 95%recovery after multiple cycles.A life cycle assessment showed that this fiber system had a lower environmental impact compared to conventional synthetic textile fibers.Overall,this work provided a practical and recyclable approach to making functional textiles from natural plant materials.
文摘A negative differential mobility (NDM) of the two-dimensional carrier-gas against some proper external regulator allowing for gradual controlled modification of the nanointerfacial environment tends to occur as interwoven with nanophotonic device functionality. In this work, several instances, in our two-decade principal research, of both experimental observation and conceptual prediction concerning nanophotonics NDM are reconsidered towards outlining a global potential for the appearance of the effect.
文摘The optoelectronic reliability of representative radioactivity-exposed nanophotodetectors and the degree of functionally tolerable radioactivity-induced responsivity de-emphasis, against increasing cumulative radioactivity-dose, is notionally considered and modelled, with a view towards experimental findings concerning p-i-n photosensors being exposed to regulated successive (α, β)-particle bombardments.
基金supported by the National Natural Science Foundation of China(No.62375108)the Natural Science Foundation of Guangdong Province(No.2024A1515010088)+3 种基金the Guangzhou Science and Technology Plan Project(No.2023A03J0130)the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(No.2019BT02X105)the Science and Technology Project in Guangzhou(No.2024A03J0812)the Postdoctoral Fellowship Program(Grade B)of China Postdoctoral Science Foundation(No.GZB20230265).
文摘The resistance and immune evasion of methicillin-resistant Staphylococcus aureus(MRSA)in biofilms are the culprits behind persistent infections.There is an urgent need for safe and effective antibacterial strategies to address MRSA and biofilm-related infections.Herein,we propose the development of an allin-one optical microfiber that integrates rapid quantitative analysis with synergistic antimicrobial therapy for deep-seated MRSA in biofilms.The prepared interfacial-functionalized sensor can be used for quantitative analysis of MRSA in clinical whole-blood samples with low volumes(10μL),reducing the detection time to 30 min and effectively preventing false-positive and false-negative results.The sensor can also be used for multimode antimicrobial therapy.This one-time treatment accelerates recovery and prevents recurrence through the synergistic effect of photothermal therapy,photodynamic therapy,and the antibacterial effect of Ag^(+),as well as the activation of immune memory.The therapy is localized with relatively low hyperthermia and does not cause harm to the surrounding healthy tissues.The integration of therapeutic agents onto the optical microfiber precludes their enrichment in other organs.The light guided through the optical fiber can reach deep-seated biofilms,which other light sources fail to reach.This work is promising for the clinical diagnosis and treatment of deep-seated infections.
