Nanozymes,which possess enzyme-like catalytic activity,are attractive alternatives to natural enzymes.Their activity is largely dependent on the structure of the material.However,challenges remain in optimizing the st...Nanozymes,which possess enzyme-like catalytic activity,are attractive alternatives to natural enzymes.Their activity is largely dependent on the structure of the material.However,challenges remain in optimizing the structure-activity relationship.This work explores the synthesis and utilization of PtCu nanostructures(NSs),focusing on their peroxidase(POD)-like properties and their potential as antibacterial agents.We developed PtCu dendrites that transform into unique dendroframe octahedrons(DFOs)and subsequently stabilize into solid octahedrons with unusual growth behaviour.The intermediate DFO,showed higher POD-like activity in comparison to other shapes of PtCu NSs.The DFOs also have the better ability to consume glutathione,thus enhancing their sterilization effect.Furthermore,we demonstrate the effectiveness of these PtCu DFOs as powerful antibacterial agents.This work provides valuable information on shape dependent activities of PtCu NSs in the field of biomedicine.展开更多
We demonstrate a facile and effective approach to significantly improve the photoluminescence of bulk MoS2 via laser thinning followed by gold particle decoration. Upon laser thinning of exfoliated bulk MoSz photolumi...We demonstrate a facile and effective approach to significantly improve the photoluminescence of bulk MoS2 via laser thinning followed by gold particle decoration. Upon laser thinning of exfoliated bulk MoSz photoluminescence emerges from the laser-thinned region. After further treatment with an AuCl3 solution, gold particles self-assemble on the laser-thinned region and thick edges, further increasing the fluorescence of bulk MoS2 28 times and the Raman response 3 times. Such fluorescence enhancement can be attributed to both surface plasmon resonance and p-type doping induced by gold particles. The combination of laser thinning and AuCl3 treatment enables the functionalization of bulk MoS2 for optoelectronic applications. It can also provide a viable strategy for mask-free and area-selective p-type doping on single MoS2 flakes.展开更多
Through precisely measured data of field outcrops,wells logging data and samples analytical data in the research area,it is considered that the topography of the sedimentary period of Xiaoheba formation is relatively ...Through precisely measured data of field outcrops,wells logging data and samples analytical data in the research area,it is considered that the topography of the sedimentary period of Xiaoheba formation is relatively flat,the water flow is shallow and wide and the fluctuation is frequent,the supply of source is abundant,and it has favorable sedimentary conditions to forming shallow-river fluvial-dominated delta.The delta in the research area is a distal-basin sedimentary,and due to multiple branches and long extension of the river channel,there are large area of delta front sand deposits with fine grained development,high maturity and underwater environment existed within the research area.The Xiaoheba formation in the Jiannan-Fuling three-dimensional seismic region has the obvious characteristics of strong peak progradation reflection.Based on the above analysis,the sedimentary mode of shallow-river fluvial-dominated delta of Xiaoheba formation of Southeastern Sichuan Basin is established and the reservoir forming conditions are discussed.It is considered that the Xiaoheba formation has excellent hydrocarbon source,high-quality reservoirs and effective migration channel.This research has certain guiding significance for the next stage of tight marine clastic rocks oil and gas exploration of Southeastern Sichuan Basin.展开更多
The light-driven material-microorganism biohybrid system has the potential to transfer solar energy for chemical production.However,few studies have reported the construction of biohybrid systems using light-responsiv...The light-driven material-microorganism biohybrid system has the potential to transfer solar energy for chemical production.However,few studies have reported the construction of biohybrid systems using light-responsive materials with nonmodel strains that have been widely used in practical industrial production for value-added chemicals,especially with regard to the mechanism of action of photogenerated charges in the cytoplasm,probably due to the complexity of their anabolic pathways.Herein,a biohybrid system as a research mode was constructed by electrostatically self-assembling a highly efficient light-harvesting material of graphite-phase nitrided carbon(g-C_(3)N_(4))nanosheets with nonmodel strains(Phaffia rhodozyma)for synthesis of nutritional chemical astaxanthin.The biohybrid interface enabled efficient separation,transfer,and transport of photogenerated charges from g-C_(3)N_(4) into the interior of P.rhodozyma,which improved the substance metabolism and the energy metabolism of P.rhodozyma.Notably,photogenerated charges can significantly promote the accumulation of precursors along the astaxanthin anabolic pathway and enhance the cytoplasmic redox environment and ATP levels in the interior of P.rhodozyma,even under adverse conditions(such as enzyme inhibitors),thus increasing the yield of astaxanthin compared to the traditional culture of P.rhodozyma.This study not only provides new ideas for converting solar energy into value-added chemicals,but it also provides guidance for regulating microbial synthesis plants.展开更多
基金supported by the National Natural Science Foundation of China(Nos.22175087 and 22075133)the Jiangsu Provincial Funds(No.BX2022013)for the financial support.
文摘Nanozymes,which possess enzyme-like catalytic activity,are attractive alternatives to natural enzymes.Their activity is largely dependent on the structure of the material.However,challenges remain in optimizing the structure-activity relationship.This work explores the synthesis and utilization of PtCu nanostructures(NSs),focusing on their peroxidase(POD)-like properties and their potential as antibacterial agents.We developed PtCu dendrites that transform into unique dendroframe octahedrons(DFOs)and subsequently stabilize into solid octahedrons with unusual growth behaviour.The intermediate DFO,showed higher POD-like activity in comparison to other shapes of PtCu NSs.The DFOs also have the better ability to consume glutathione,thus enhancing their sterilization effect.Furthermore,we demonstrate the effectiveness of these PtCu DFOs as powerful antibacterial agents.This work provides valuable information on shape dependent activities of PtCu NSs in the field of biomedicine.
文摘We demonstrate a facile and effective approach to significantly improve the photoluminescence of bulk MoS2 via laser thinning followed by gold particle decoration. Upon laser thinning of exfoliated bulk MoSz photoluminescence emerges from the laser-thinned region. After further treatment with an AuCl3 solution, gold particles self-assemble on the laser-thinned region and thick edges, further increasing the fluorescence of bulk MoS2 28 times and the Raman response 3 times. Such fluorescence enhancement can be attributed to both surface plasmon resonance and p-type doping induced by gold particles. The combination of laser thinning and AuCl3 treatment enables the functionalization of bulk MoS2 for optoelectronic applications. It can also provide a viable strategy for mask-free and area-selective p-type doping on single MoS2 flakes.
基金Funded by National Science and Technology Major Project of China(No.2016ZX05002004-004).
文摘Through precisely measured data of field outcrops,wells logging data and samples analytical data in the research area,it is considered that the topography of the sedimentary period of Xiaoheba formation is relatively flat,the water flow is shallow and wide and the fluctuation is frequent,the supply of source is abundant,and it has favorable sedimentary conditions to forming shallow-river fluvial-dominated delta.The delta in the research area is a distal-basin sedimentary,and due to multiple branches and long extension of the river channel,there are large area of delta front sand deposits with fine grained development,high maturity and underwater environment existed within the research area.The Xiaoheba formation in the Jiannan-Fuling three-dimensional seismic region has the obvious characteristics of strong peak progradation reflection.Based on the above analysis,the sedimentary mode of shallow-river fluvial-dominated delta of Xiaoheba formation of Southeastern Sichuan Basin is established and the reservoir forming conditions are discussed.It is considered that the Xiaoheba formation has excellent hydrocarbon source,high-quality reservoirs and effective migration channel.This research has certain guiding significance for the next stage of tight marine clastic rocks oil and gas exploration of Southeastern Sichuan Basin.
基金supported by the National Natural Science Foundation of China (grant nos.21727808,21971114,and 21908105)the Natural Science Foundation of Jiangsu Province (grant no.BK20200090)the National Science Fund for Distinguished Young Scholars (grant no.21625401).
文摘The light-driven material-microorganism biohybrid system has the potential to transfer solar energy for chemical production.However,few studies have reported the construction of biohybrid systems using light-responsive materials with nonmodel strains that have been widely used in practical industrial production for value-added chemicals,especially with regard to the mechanism of action of photogenerated charges in the cytoplasm,probably due to the complexity of their anabolic pathways.Herein,a biohybrid system as a research mode was constructed by electrostatically self-assembling a highly efficient light-harvesting material of graphite-phase nitrided carbon(g-C_(3)N_(4))nanosheets with nonmodel strains(Phaffia rhodozyma)for synthesis of nutritional chemical astaxanthin.The biohybrid interface enabled efficient separation,transfer,and transport of photogenerated charges from g-C_(3)N_(4) into the interior of P.rhodozyma,which improved the substance metabolism and the energy metabolism of P.rhodozyma.Notably,photogenerated charges can significantly promote the accumulation of precursors along the astaxanthin anabolic pathway and enhance the cytoplasmic redox environment and ATP levels in the interior of P.rhodozyma,even under adverse conditions(such as enzyme inhibitors),thus increasing the yield of astaxanthin compared to the traditional culture of P.rhodozyma.This study not only provides new ideas for converting solar energy into value-added chemicals,but it also provides guidance for regulating microbial synthesis plants.
