In recent years, solar-driven photothermal water evaporation technology for seawater desalination and wastewater treatment has developed rapidly, which is of great significance for addressing the issue of freshwater scarcity. However, due to the high costs associated with the manufacturing, maintenance, and operation of such devices, their application remains challenging in remote and resource-scarce regions. With its exceptional light absorption in the near-infrared region, high hydrophilicity, stable chemical properties, and the low cost of recycling waste polyphenylene sulfide, carbonized polyphenylene sulfide stands out as an ideal photothermal material for solar-driven water evaporation devices. Ordinary wood in nature usually has a highly regenerative porous structure, which is a natural water transport channel that facilitates the transport of water from the bottom to the top, allowing it to be rapidly converted into vapor. Based on this characteristic, this article innovatively proposes to prepare waste polyphenylene sulfide into porous carbonized materials (KCP) as the photothermal conversion material for novel photothermal water evaporation devices, achieving solar-driven water evaporation. This material efficiently facilitates the conversion between solar and thermal energy, and exhibits excellent hydrophilicity, thereby enabling the rapid utilization of absorbed solar energy for water evaporation on the surface of the evaporator. In this study, a porous carbonized polyphenylene sulfide photo-thermal water evaporator (KCP-Wood) was fabricated by using freeze-drying and in-situ coating to load the photo-thermal conversion material onto a wood substrate. Under 1 simulated solar irradiation, this evaporator achieved a water evaporation rate of 2.41 kg m-2 h-1 and a photothermal conversion efficiency of 91.3%. Additionally, a systematic study was conducted on the photothermal performance of various light-water evaporators, encompassing photothermal conversion efficiency, stability, thermal conductivity, and anti-fouling capabilities. Finally, the practical performance of the light-water evaporator under various environmental conditions was validated, demonstrating its excellent stability and durability. It is capable of effectively applying to high-efficiency water resource utilization and solar energy conversion fields.
{"title":"Preparation of sulfur-doped porous carbon from polyphenylene sulfide waste for photothermal conversion materials to achieve solar-driven water evaporation","authors":"Xuejing Wei, Zixuan Zou, Jiayi Yao, Li Sun, Yinxing Xu, Lufeng Zhang, Shaohua Chen, Yuhao Liu, Jiayue Chen","doi":"10.1039/d4nr04006f","DOIUrl":"https://doi.org/10.1039/d4nr04006f","url":null,"abstract":"In recent years, solar-driven photothermal water evaporation technology for seawater desalination and wastewater treatment has developed rapidly, which is of great significance for addressing the issue of freshwater scarcity. However, due to the high costs associated with the manufacturing, maintenance, and operation of such devices, their application remains challenging in remote and resource-scarce regions. With its exceptional light absorption in the near-infrared region, high hydrophilicity, stable chemical properties, and the low cost of recycling waste polyphenylene sulfide, carbonized polyphenylene sulfide stands out as an ideal photothermal material for solar-driven water evaporation devices. Ordinary wood in nature usually has a highly regenerative porous structure, which is a natural water transport channel that facilitates the transport of water from the bottom to the top, allowing it to be rapidly converted into vapor. Based on this characteristic, this article innovatively proposes to prepare waste polyphenylene sulfide into porous carbonized materials (KCP) as the photothermal conversion material for novel photothermal water evaporation devices, achieving solar-driven water evaporation. This material efficiently facilitates the conversion between solar and thermal energy, and exhibits excellent hydrophilicity, thereby enabling the rapid utilization of absorbed solar energy for water evaporation on the surface of the evaporator. In this study, a porous carbonized polyphenylene sulfide photo-thermal water evaporator (KCP-Wood) was fabricated by using freeze-drying and in-situ coating to load the photo-thermal conversion material onto a wood substrate. Under 1 simulated solar irradiation, this evaporator achieved a water evaporation rate of 2.41 kg m-2 h-1 and a photothermal conversion efficiency of 91.3%. Additionally, a systematic study was conducted on the photothermal performance of various light-water evaporators, encompassing photothermal conversion efficiency, stability, thermal conductivity, and anti-fouling capabilities. Finally, the practical performance of the light-water evaporator under various environmental conditions was validated, demonstrating its excellent stability and durability. It is capable of effectively applying to high-efficiency water resource utilization and solar energy conversion fields.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"34 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142917474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qianyuan He, Zhanjie Zhang, Haojie Liu, Zhan Tuo, Jie Zhou, Yan Hu, Yajie Sun, Chao Wan, Zushun Xu, Jonathan F. Lovell, Desheng Hu, Kunyu Yang, Honglin Jin
Correction for ‘Relieving immunosuppression during long-term anti-angiogenesis therapy using photodynamic therapy and oxygen delivery’ by Qianyuan He et al., Nanoscale, 2020, 12, 14788–14800, https://doi.org/10.1039/D0NR02750B.
{"title":"Correction: Relieving immunosuppression during long-term anti-angiogenesis therapy using photodynamic therapy and oxygen delivery","authors":"Qianyuan He, Zhanjie Zhang, Haojie Liu, Zhan Tuo, Jie Zhou, Yan Hu, Yajie Sun, Chao Wan, Zushun Xu, Jonathan F. Lovell, Desheng Hu, Kunyu Yang, Honglin Jin","doi":"10.1039/d4nr90243b","DOIUrl":"https://doi.org/10.1039/d4nr90243b","url":null,"abstract":"Correction for ‘Relieving immunosuppression during long-term anti-angiogenesis therapy using photodynamic therapy and oxygen delivery’ by Qianyuan He <em>et al.</em>, <em>Nanoscale</em>, 2020, <strong>12</strong>, 14788–14800, https://doi.org/10.1039/D0NR02750B.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"66 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142917838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nada Khalfaoui-Hassani, Mary Tabut, Ndeye Haby Awe, Christophe Desmarets, Daniele Toffoli, Mauro Stener, Nicolas Goubet, Monica Calatayud, Caroline Salzemann
Developing chiral plasmonic nanostructures represents a significant scientific challenge due to their multidisciplinary potential. Observations have revealed that the dichroic behavior of metal plasmons changes when chiral molecules are present in the system, offering promising applications in various fields such as nano-optics, asymmetric catalysis, polarization-sensitive photochemistry and molecular detection. In this study, we explored the synthesis of plasmonic gold nanoparticles and the role of cysteine in their chiroplasmonic properties. Specifically, we synthesized chiral gold nano-arrows using a seed-mediated-growth synthesis method, in which gold nanorods are used as seeds while incorporating L-cysteine into growth solution as a chiral ligand. Our results show clearly that the chiral molecule transfers chirality to gold nanocrystals and the morphology is controlled through kinetic growth. In addition, we demonstrate that the chiroplasmonic properties, such as the sign of circular dichroism, can be modulated using only one enantiomeric form in the growth solution. To understand the origin of such an effect, we conducted theoretical modelling using density functional theory. Our results point to the intermolecular cysteine interactions as a key factor in the dichroic properties of surface-molecule chiral systems.
{"title":"The intriguing role of L-cysteine in the modulation of chiroplasmonic properties of chiral gold nano-arrows","authors":"Nada Khalfaoui-Hassani, Mary Tabut, Ndeye Haby Awe, Christophe Desmarets, Daniele Toffoli, Mauro Stener, Nicolas Goubet, Monica Calatayud, Caroline Salzemann","doi":"10.1039/d4nr04131c","DOIUrl":"https://doi.org/10.1039/d4nr04131c","url":null,"abstract":"Developing chiral plasmonic nanostructures represents a significant scientific challenge due to their multidisciplinary potential. Observations have revealed that the dichroic behavior of metal plasmons changes when chiral molecules are present in the system, offering promising applications in various fields such as nano-optics, asymmetric catalysis, polarization-sensitive photochemistry and molecular detection. In this study, we explored the synthesis of plasmonic gold nanoparticles and the role of cysteine in their chiroplasmonic properties. Specifically, we synthesized chiral gold nano-arrows using a seed-mediated-growth synthesis method, in which gold nanorods are used as seeds while incorporating <small>L</small>-cysteine into growth solution as a chiral ligand. Our results show clearly that the chiral molecule transfers chirality to gold nanocrystals and the morphology is controlled through kinetic growth. In addition, we demonstrate that the chiroplasmonic properties, such as the sign of circular dichroism, can be modulated using only one enantiomeric form in the growth solution. To understand the origin of such an effect, we conducted theoretical modelling using density functional theory. Our results point to the intermolecular cysteine interactions as a key factor in the dichroic properties of surface-molecule chiral systems.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"27 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142917393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alberta Carella, Francesco Rossella, Narcis Avarvari, Somak Majumder, Eric G Bowes, Andrew C. Jones, Jennifer Hollingsworth, Davide Vanossi, Suryakant Mishra, Camilla Ferrari, Flavia Pop, Han Htoon, Claudio Fontanesi
A great effort has been made in the last decades to realize electronic devices based on organic molecules. A possible approach in this field is to exploit the chirality of organic molecules for the development of spintronic devices, an applicative way to implement the chiral-induced spin selectivity (CISS) effect. In this work we exploit enantiopure Tetrathiafulvalene (TTF) derivatives as chiral inducers at the nanoscale. The aim is to make use of TTF’s well-known and unique semiconducting properties, to be expressed in the fields of enantio-selectivity and of chiral-induced spin selectivity (CISS) effect. The experimental results shown in this paper demonstrate further how chirality and spin are deeply interrelated, as foreseen within the CISS effect theory, paving the way to application of TTF derivatives in the field of spintronics. In this work, we demonstrate that tetramethyl-Bis(ethylenedithio)-tetrathiafulvalene (TM-BEDT-TTF) (1) behaves as an efficient spin filter, as evidenced by magneto-atomic force microscopy (mcAFM) measurements. Additionally, it is shown to be effective in transferring chirality to CdS/CdSe core-shell nanoparticles, as inferred from the analysis of circularly resolved photoluminescence spectra. This makes (1) a promising candidate for a variety of applications, ranging from plasmonics to quantum computing.
{"title":"Chiral Induction at the Nanoscale and Spin Selectivity in Electron Transmission in Chiral Methylated BEDT-TTF derivatives","authors":"Alberta Carella, Francesco Rossella, Narcis Avarvari, Somak Majumder, Eric G Bowes, Andrew C. Jones, Jennifer Hollingsworth, Davide Vanossi, Suryakant Mishra, Camilla Ferrari, Flavia Pop, Han Htoon, Claudio Fontanesi","doi":"10.1039/d4nr04574b","DOIUrl":"https://doi.org/10.1039/d4nr04574b","url":null,"abstract":"A great effort has been made in the last decades to realize electronic devices based on organic molecules. A possible approach in this field is to exploit the chirality of organic molecules for the development of spintronic devices, an applicative way to implement the chiral-induced spin selectivity (CISS) effect. In this work we exploit enantiopure Tetrathiafulvalene (TTF) derivatives as chiral inducers at the nanoscale. The aim is to make use of TTF’s well-known and unique semiconducting properties, to be expressed in the fields of enantio-selectivity and of chiral-induced spin selectivity (CISS) effect. The experimental results shown in this paper demonstrate further how chirality and spin are deeply interrelated, as foreseen within the CISS effect theory, paving the way to application of TTF derivatives in the field of spintronics. In this work, we demonstrate that tetramethyl-Bis(ethylenedithio)-tetrathiafulvalene (TM-BEDT-TTF) (1) behaves as an efficient spin filter, as evidenced by magneto-atomic force microscopy (mcAFM) measurements. Additionally, it is shown to be effective in transferring chirality to CdS/CdSe core-shell nanoparticles, as inferred from the analysis of circularly resolved photoluminescence spectra. This makes (1) a promising candidate for a variety of applications, ranging from plasmonics to quantum computing.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"73 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142924954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pyrrole in a cholesteric liquid crystal was discharged using a Tesla coil to generate pyrrole radicals, affording linear-shaped nano-ordered pyrrole oligomers. Subsequently, the electrochemical polymerisation of a pre-oriented pyrrole oligomer having good affinity for liquid crystals was performed to achieve polypyrrole-imprinted asymmetry from the cholesteric liquid crystal structure. The resultant polymers were analysed using polarising optical microscopy observations, scanning electron microscopy, electrochemistry, optical spectroscopy, and electron spin resonance. The combination of spark discharge and electrochemical polymerisation is useful for conveniently transferring the liquid crystal structure to the main chain of polymers.
{"title":"Liquid-crystal-imprinted synthesis of chiral polypyrroles without a chiral centre using a two-step method of spark-discharge oligomerisation-electrochemical polymerisation","authors":"Ryo Miyashita, Aoi Tokutake, Shigeki Nimori, Hiromasa Goto","doi":"10.1039/d4nr03982c","DOIUrl":"https://doi.org/10.1039/d4nr03982c","url":null,"abstract":"Pyrrole in a cholesteric liquid crystal was discharged using a Tesla coil to generate pyrrole radicals, affording linear-shaped nano-ordered pyrrole oligomers. Subsequently, the electrochemical polymerisation of a pre-oriented pyrrole oligomer having good affinity for liquid crystals was performed to achieve polypyrrole-imprinted asymmetry from the cholesteric liquid crystal structure. The resultant polymers were analysed using polarising optical microscopy observations, scanning electron microscopy, electrochemistry, optical spectroscopy, and electron spin resonance. The combination of spark discharge and electrochemical polymerisation is useful for conveniently transferring the liquid crystal structure to the main chain of polymers.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"6 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142917396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. S. Vigneshraaj, Siva Kumar Ramesh, Jinkwon Kim, Kavita Pandey
Bifunctional oxygen electrocatalysis is a pivotal process that underpins a diverse array of sustainable energy technologies, including electrolyzers and fuel cells. Metal selenides have been identified as highly promising candidates for oxygen electrocatalysts with electronic structure engineering that lies at the heart of catalyst design. Two-phase Fe-doped nitrogen carbon (NC)-supported nickel selenides were synthesized using a coordination polymer template. Fe doping offers significant advantages as it enhances electronic interactions, resulting in higher availability of active sites than nickel selenides and optimizing the adsorption energy for reaction intermediates. Owing to the intriguing compositional and structural features, the obtained NixFe1-xSe2-NC@400 electrocatalyst displays better catalytic activity with an overpotential (10) of 253 mV and a lower Tafel slope of 57.1 mV/dec for the Oxygen Evolution Reaction (OER) in 1M KOH. Likewise, the catalyst demonstrated remarkable efficiency in Oxygen Reduction Reaction (ORR) catalysis, achieving a limiting current density comparable to that of the standard Pt/C catalyst and exhibiting an improved Tafel slope of 35.4 mV/dec in 0.1 M KOH. This work reveals the influence of Fe dopants in oxygen electrocatalysis and presents an effective approach to tuning the electronic structure for the development of highly active electrocatalysts in alkaline media.
{"title":"Phase-Dependent Electronic Structure Modulation of Nickel Selenides by Fe Doping for Enhanced Bifunctional Oxygen Electrocatalysis","authors":"A. S. Vigneshraaj, Siva Kumar Ramesh, Jinkwon Kim, Kavita Pandey","doi":"10.1039/d4nr04047c","DOIUrl":"https://doi.org/10.1039/d4nr04047c","url":null,"abstract":"Bifunctional oxygen electrocatalysis is a pivotal process that underpins a diverse array of sustainable energy technologies, including electrolyzers and fuel cells. Metal selenides have been identified as highly promising candidates for oxygen electrocatalysts with electronic structure engineering that lies at the heart of catalyst design. Two-phase Fe-doped nitrogen carbon (NC)-supported nickel selenides were synthesized using a coordination polymer template. Fe doping offers significant advantages as it enhances electronic interactions, resulting in higher availability of active sites than nickel selenides and optimizing the adsorption energy for reaction intermediates. Owing to the intriguing compositional and structural features, the obtained NixFe1-xSe2-NC@400 electrocatalyst displays better catalytic activity with an overpotential (10) of 253 mV and a lower Tafel slope of 57.1 mV/dec for the Oxygen Evolution Reaction (OER) in 1M KOH. Likewise, the catalyst demonstrated remarkable efficiency in Oxygen Reduction Reaction (ORR) catalysis, achieving a limiting current density comparable to that of the standard Pt/C catalyst and exhibiting an improved Tafel slope of 35.4 mV/dec in 0.1 M KOH. This work reveals the influence of Fe dopants in oxygen electrocatalysis and presents an effective approach to tuning the electronic structure for the development of highly active electrocatalysts in alkaline media.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"48 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142917473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Methuosis, a non-apoptotic pattern of cell death, triggers the accumulation of macropinosome-derived vacuoles in the cytoplasm. Through this novel mechanism, methuosis inducers possess great potential in fighting apoptosis-resistant cancer cells and offer a promising alternative for cancer treatment. However, the potent methuosis inducer, 3-(5-methoxy, 2-methyl-1H-indol-3-yl)-1-(4-pyridinyl)-2-propen-1-one (MOMIPP), faces an intractable issue of insolubility in most solvents, hindering in vivo dosing and compromising the validation of its antitumor efficacy. Few strategies have been developed to effectively deliver MOMIPP and achieve robust in vivo tumor inhibition since its first report in 2012. Here, a MOMIPP self-emulsifying drug delivery system (MOMIPP-SEDDS) was developed to substantially improve its oral bioavailability and achieve a favorable antitumor effect in a mouse xenograft tumor model. Our findings demonstrated that the MOMIPP-SEDDS was internalized into Caco-2 cells via the lipid raft/caveolae pathway and exhibited enhanced absorption in both cell monolayers and everted gut sacs. Compared with MOMIPP suspensions, MOMIPP-SEDDS showed a 13.3-fold increase in peak concentration and increased relative bioavailability by 19.98 times. By inducing methuosis, MOMIPP-SEDDS successfully retarded tumor progression in a subcutaneous HeLa mouse tumor model. Additionally, transmission electron microscopy (TEM) images of the tumor sections evidenced the occurrence of methuosis in the MOMIPP-SEDDS treatment group. This MOMIPP-SEDDS emerges as a promising lipid nanoparticle platform and high translational medicine for the oral delivery of MOMIPP to exert methuosis-induced tumor suppression for cancer treatment.
{"title":"Oral delivery of MOMIPP lipid nanoparticles for methuosis-induced cancer chemotherapy","authors":"Zeyuan Mao, Guihong Chai","doi":"10.1039/d4nr04044a","DOIUrl":"https://doi.org/10.1039/d4nr04044a","url":null,"abstract":"Methuosis, a non-apoptotic pattern of cell death, triggers the accumulation of macropinosome-derived vacuoles in the cytoplasm. Through this novel mechanism, methuosis inducers possess great potential in fighting apoptosis-resistant cancer cells and offer a promising alternative for cancer treatment. However, the potent methuosis inducer, 3-(5-methoxy, 2-methyl-1H-indol-3-yl)-1-(4-pyridinyl)-2-propen-1-one (MOMIPP), faces an intractable issue of insolubility in most solvents, hindering in vivo dosing and compromising the validation of its antitumor efficacy. Few strategies have been developed to effectively deliver MOMIPP and achieve robust in vivo tumor inhibition since its first report in 2012. Here, a MOMIPP self-emulsifying drug delivery system (MOMIPP-SEDDS) was developed to substantially improve its oral bioavailability and achieve a favorable antitumor effect in a mouse xenograft tumor model. Our findings demonstrated that the MOMIPP-SEDDS was internalized into Caco-2 cells via the lipid raft/caveolae pathway and exhibited enhanced absorption in both cell monolayers and everted gut sacs. Compared with MOMIPP suspensions, MOMIPP-SEDDS showed a 13.3-fold increase in peak concentration and increased relative bioavailability by 19.98 times. By inducing methuosis, MOMIPP-SEDDS successfully retarded tumor progression in a subcutaneous HeLa mouse tumor model. Additionally, transmission electron microscopy (TEM) images of the tumor sections evidenced the occurrence of methuosis in the MOMIPP-SEDDS treatment group. This MOMIPP-SEDDS emerges as a promising lipid nanoparticle platform and high translational medicine for the oral delivery of MOMIPP to exert methuosis-induced tumor suppression for cancer treatment.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"57 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MXenes, with its good biocompatibility, excellent photovoltaic properties, excellent physicochemical properties, and desirable bioactivity, has a broad application prospect in the field of tissue regeneration. MXenes have been used in a wide range of applications including biosensing, bioimaging, tumour/infection therapy, bone regeneration and wound repair. By applying bioactive materials to modify the surface of MXenes, a series of multifunctional MXenes-based nanomaterials can be designed for different biomedical applications to achieve better therapeutic effects or more desirable biological functions. This paper reviews the existing studies on MXenes-based bioactivities, surface modification strategies and biomedical applications. Finally, the challenges, trends and prospects of MXenes nanomaterials are discussed. We expect that more and more well-designed MXene-based biomaterials will have a wider range of biomedical applications, thus providing favourable information for the clinical translation of nanomedicine.
{"title":"Bioactive surface functionalized MXenes for Biomedicine","authors":"Ting Li, Weipeng Qiang, Bo Lei","doi":"10.1039/d4nr04260c","DOIUrl":"https://doi.org/10.1039/d4nr04260c","url":null,"abstract":"MXenes, with its good biocompatibility, excellent photovoltaic properties, excellent physicochemical properties, and desirable bioactivity, has a broad application prospect in the field of tissue regeneration. MXenes have been used in a wide range of applications including biosensing, bioimaging, tumour/infection therapy, bone regeneration and wound repair. By applying bioactive materials to modify the surface of MXenes, a series of multifunctional MXenes-based nanomaterials can be designed for different biomedical applications to achieve better therapeutic effects or more desirable biological functions. This paper reviews the existing studies on MXenes-based bioactivities, surface modification strategies and biomedical applications. Finally, the challenges, trends and prospects of MXenes nanomaterials are discussed. We expect that more and more well-designed MXene-based biomaterials will have a wider range of biomedical applications, thus providing favourable information for the clinical translation of nanomedicine.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"66 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hur-E-Jannat Moni, Bahareh Rezaei, Ioannis H. Karampelas, Mortaza Saeidi-Javash, Jenifer Gómez-Pastora, Kai Wu, Minxiang Zeng
Additive manufacturing (AM) of magnetic materials has recently attracted increasing interest for various applications but is often limited by the high cost and supply chain risks of rare-earth-element (REE) magnetic precursors. Recent advances in nanomanufacturing have enabled the development of rare-earth-free (REF) magnetic materials, such as spinel ferrites, hexaferrites, MnAl, MnBi, Alnico, FePt, and iron oxides/nitrides, which offer promising alternatives for printing high-performance magnetic devices. This review provides a detailed overview of the latest developments in REF magnetic materials, covering both synthesis strategies of REF magnetic materials/nanomaterials and their integration into AM processes. We summarize the design and formulation of magnetic inks, emphasizing the unique properties of REF ferromagnetic and ferrimagnetic systems and their adaptability to AM techniques like direct ink writing, inkjet printing, aerosol jet printing, and screen printing. Key advancements in materials chemistry, ink rheology, and device performance are discussed, highlighting how the structure of REF magnetic materials impacts device functionalities. This review concludes with a perspective on the pressing challenges and emerging opportunities in AM of REF magnetic inks. Through this review, we aim to offer insights into the structure-processing-property relationship of REF magnetic inks and guide the design of next-generation printable magnetic systems in a scalable, cost-effective, and sustainable manner.
{"title":"Printing rare-earth-free (REF) magnetic inks: synthesis, formulation, and device applications","authors":"Hur-E-Jannat Moni, Bahareh Rezaei, Ioannis H. Karampelas, Mortaza Saeidi-Javash, Jenifer Gómez-Pastora, Kai Wu, Minxiang Zeng","doi":"10.1039/d4nr04035j","DOIUrl":"https://doi.org/10.1039/d4nr04035j","url":null,"abstract":"Additive manufacturing (AM) of magnetic materials has recently attracted increasing interest for various applications but is often limited by the high cost and supply chain risks of rare-earth-element (REE) magnetic precursors. Recent advances in nanomanufacturing have enabled the development of rare-earth-free (REF) magnetic materials, such as spinel ferrites, hexaferrites, MnAl, MnBi, Alnico, FePt, and iron oxides/nitrides, which offer promising alternatives for printing high-performance magnetic devices. This review provides a detailed overview of the latest developments in REF magnetic materials, covering both synthesis strategies of REF magnetic materials/nanomaterials and their integration into AM processes. We summarize the design and formulation of magnetic inks, emphasizing the unique properties of REF ferromagnetic and ferrimagnetic systems and their adaptability to AM techniques like direct ink writing, inkjet printing, aerosol jet printing, and screen printing. Key advancements in materials chemistry, ink rheology, and device performance are discussed, highlighting how the structure of REF magnetic materials impacts device functionalities. This review concludes with a perspective on the pressing challenges and emerging opportunities in AM of REF magnetic inks. Through this review, we aim to offer insights into the structure-processing-property relationship of REF magnetic inks and guide the design of next-generation printable magnetic systems in a scalable, cost-effective, and sustainable manner.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"1 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wenjie Zhong, Jifan Zhang, Chenxue Zhu, Huaguo Tang, Xunyong Liu, Zhuhui Qiao, Yi Liu
Gold nanoparticles (AuNPs) have been widely used as efficient and environmentally friendly catalysts due to their high specific surface area and abundant active sites. However, AuNPs-based catalytic system faces several challenges, including the instability of AuNPs during the reaction, the difficulty of monitoring the process, which can easily result in insufficient reaction due to short reaction time or waste of resources due to long time, as well as issues of catalyst recovery. This paper proposes a novel catalyst integrating various functions, such as high stability, the capacity for real-time monitoring of the catalytic process, and rapid recycling. Temperature-sensitive polymers (HPEI-IBAm) terminated with isobutyramide (IBAm) groups were prepared by reacting isobutyric anhydride with hyperbranched polyethyleneimine (HPEI). Subsequently, temperature-sensitive and reducing fluorescent carbon dots (Tr-CDs) were synthesized using HPEI-IBAm as carbon source. Tr-CDs can reduce HAuCl4 precursor in situ, yielding high-performance catalysts, Tr-CDs/AuNPs, with both temperature-sensitive and fluorescent properties. With the help of changes in fluorescence intensity and the real-time synchronous change in the reaction conversion rate, monitoring of the catalytic reaction process is achieved. Moreover, their temperature sensitivity enables the rapid recovery of the catalysts. Using the reduction of p-nitrophenol as a model, we thoroughly investigated the catalytic performance of Tr-CDs/AuNPs. Importantly, the catalytic process exhibited a good linear relationship between the change in fluorescence intensity and the reaction time (R2 = 0.9993) and maintained a synchronous change with the conversion rate, enabling the monitoring of the reaction process. Meanwhile, the catalytic efficiency of this catalyst remained above 90% after five recycling and reuse cycles, indicating no obvious decline in catalytic activity. This catalyst demonstrates good performance, reusability, and real-time reaction monitoring, promising bright application prospects.
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