Pub Date : 2024-06-26DOI: 10.1016/j.mtchem.2024.102176
Kaiquan He, Junlong Feng, Xiaowei Wu, Ziqin Liu, Ye Zhang, Pu Hu, Chaoqun Shang
The soluble lithium polysulfides' shuttle effect impedes the practical application of Li–S batteries with high theoretical energy density. To confine the active S species in the cathode region, in this work, an artificial interlayer based on the composition of TiO(PO) (TOPO) and N-doped carbon nanotube (NCNT) is introduced to hinder the lithium polysulfides’ shuttle effect and enhance the reaction kinetics of active S species. The TOPO provides sufficient chemical bonding to soluble lithium polysulfides and fast Li migration, while the NCNT ensures fast electron transport to the transformation of absorbed lithium polysulfides. Thanks to the synergistic combination of TOPO and NCNT, at 0.1 C, the initial discharge specific capacity of corresponding Li–S batteries is 1483.55 mAh g, while at 1 C, a capacity decay of 0.14 % per cycle is achieved for 400 cycles.
可溶性多硫化锂的穿梭效应阻碍了具有高理论能量密度的锂-S 电池的实际应用。为了将活性 S 物种限制在正极区域，本研究引入了基于 TiO（PO）（TOPO）和掺杂 N 的碳纳米管（NCNT）组成的人工夹层，以阻碍多硫化锂的穿梭效应并增强活性 S 物种的反应动力学。拓扑氧化物为可溶性多硫化锂提供了充分的化学键和快速的锂迁移，而 NCNT 则确保了被吸收的多硫化锂在转化过程中的快速电子传输。由于 TOPO 和 NCNT 的协同作用，在 0.1 摄氏度条件下，相应锂-S 电池的初始放电比容量为 1483.55 mAh g，而在 1 摄氏度条件下，每循环 400 次的容量衰减为 0.14%。
{"title":"The construction of interlayer based on Ti2O(PO4)2 to hinder the shuttle effect of lithium polysulfides","authors":"Kaiquan He, Junlong Feng, Xiaowei Wu, Ziqin Liu, Ye Zhang, Pu Hu, Chaoqun Shang","doi":"10.1016/j.mtchem.2024.102176","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102176","url":null,"abstract":"The soluble lithium polysulfides' shuttle effect impedes the practical application of Li–S batteries with high theoretical energy density. To confine the active S species in the cathode region, in this work, an artificial interlayer based on the composition of TiO(PO) (TOPO) and N-doped carbon nanotube (NCNT) is introduced to hinder the lithium polysulfides’ shuttle effect and enhance the reaction kinetics of active S species. The TOPO provides sufficient chemical bonding to soluble lithium polysulfides and fast Li migration, while the NCNT ensures fast electron transport to the transformation of absorbed lithium polysulfides. Thanks to the synergistic combination of TOPO and NCNT, at 0.1 C, the initial discharge specific capacity of corresponding Li–S batteries is 1483.55 mAh g, while at 1 C, a capacity decay of 0.14 % per cycle is achieved for 400 cycles.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-26DOI: 10.1016/j.mtchem.2024.102164
Luyao Wang, Hongna Xing, Lijuan Zhang, Xiuhong Zhu, Juan Feng, Yan Zong, Xia Deng, Jiming Zheng, Xinghua Li, Xinliang Zheng
Heteroatom doping is a productive strategy to manipulate the properties of nanomaterials. Herein, we for the first time reported the fabrication of homogeneous cerium doped NiP hollow nanoparticles (CeNi)P, (0 ≤ x ≤ 0.05) by thermal decomposition, and investigate cerium doping on the electronic structure and magnetic properties through experimental and theoretical studies. Cerium exists as Ce in the (CeNi)P nanoparticles, which maintain intrinsic hexagonal structure and hollow morphology. Ce preferentially occupies the tetrahedral sites of NiP lattice, leading to enhanced ferromagnetic properties at room temperature. By increasing the content of Ce, the saturation magnetization () values increase first and then decrease. 1 at% Ce doped NiP nanoparticles reaches the highest value of 0.028 emu/g, 7 times larger than undoped NiP. First principles calculations show that Ce doping can improve the metallic properties and induce magnetic ordering in paramagnetic NiP. The magnetic moment mainly originates from the 4 orbital of Ce, and decreases by increasing the doped Ce, which is accordant with the experimental phenomena. Ferromagnetic-antiferromagnetic oscillation occurs in Ce doped NiP, suggesting that the particular ferromagnetic coupling is ascribed to the RKKY interactions between itinerant electrons in metallic NiP host and localized electrons in Ce.
掺杂异构体是操纵纳米材料特性的一种有效策略。本文首次报道了通过热分解制备均相掺铈NiP空心纳米粒子（CeNi)P, (0 ≤ x ≤ 0.05)，并通过实验和理论研究探讨了掺铈对其电子结构和磁性能的影响。铈以Ce的形式存在于（CeNi）P纳米粒子中，保持固有的六方结构和中空形态。铈优先占据 NiP 晶格的四面体位点，从而增强了室温下的铁磁特性。随着 Ce 含量的增加，饱和磁化（）值先增大后减小。掺杂 1 at% Ce 的纳米镍磷颗粒达到了 0.028 emu/g 的最高值，是未掺杂镍磷颗粒的 7 倍。第一性原理计算表明，掺杂 Ce 能改善顺磁 NiP 的金属特性并诱导磁有序化。磁矩主要来源于 Ce 的 4 轨道，并随着掺杂 Ce 的增加而减小，这与实验现象相符。掺杂 Ce 的 NiP 中出现了铁磁-反铁磁振荡，表明这种特殊的铁磁耦合是由于金属 NiP 主体内的巡回电子与 Ce 中的局部电子之间的 RKKY 相互作用造成的。
{"title":"Rare earth Ce3+ doping regulated the electronic structure and magnetic properties of Ni2P nanoparticles: Experimental and theoretical study","authors":"Luyao Wang, Hongna Xing, Lijuan Zhang, Xiuhong Zhu, Juan Feng, Yan Zong, Xia Deng, Jiming Zheng, Xinghua Li, Xinliang Zheng","doi":"10.1016/j.mtchem.2024.102164","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102164","url":null,"abstract":"Heteroatom doping is a productive strategy to manipulate the properties of nanomaterials. Herein, we for the first time reported the fabrication of homogeneous cerium doped NiP hollow nanoparticles (CeNi)P, (0 ≤ x ≤ 0.05) by thermal decomposition, and investigate cerium doping on the electronic structure and magnetic properties through experimental and theoretical studies. Cerium exists as Ce in the (CeNi)P nanoparticles, which maintain intrinsic hexagonal structure and hollow morphology. Ce preferentially occupies the tetrahedral sites of NiP lattice, leading to enhanced ferromagnetic properties at room temperature. By increasing the content of Ce, the saturation magnetization () values increase first and then decrease. 1 at% Ce doped NiP nanoparticles reaches the highest value of 0.028 emu/g, 7 times larger than undoped NiP. First principles calculations show that Ce doping can improve the metallic properties and induce magnetic ordering in paramagnetic NiP. The magnetic moment mainly originates from the 4 orbital of Ce, and decreases by increasing the doped Ce, which is accordant with the experimental phenomena. Ferromagnetic-antiferromagnetic oscillation occurs in Ce doped NiP, suggesting that the particular ferromagnetic coupling is ascribed to the RKKY interactions between itinerant electrons in metallic NiP host and localized electrons in Ce.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-26DOI: 10.1016/j.mtchem.2024.102173
Alexey S. Berezin
Luminescent [HL][ZnX] [X = Cl, Br] tetrahalozincate(II) compounds with triphenylphosphonium cation (HL = PhPH) were isolated using hydrohalic acids. This study reports the synthesis, crystal structures, and photophysical properties of novel tetrahalozincate(II) compounds. The [HL][ZnCl] and [HL][ZnBr] crystallize in the 2/ monoclinic and rhombic space groups, respectively. The compounds exhibit a strong ultraviolet (UV–B, λmax ≈ 290 nm) fluorescence and blue-green and green phosphorescence in solid state, with a high quantum efficiency (up to 78 %). The luminescence mechanism was investigated, revealing that the UV-B and green emissions are ascribed to the {ZnX}-{PhPH} exciton-phonon emission, and the blue-green emission arises from the transition within the organic moiety. The [HL][ZnCl] compound shows an unexpected up-conversion luminescence at 305 nm under 405 nm excitation, presumably caused by stepwise two-photon absorption accompanied by proton-coupled electron transfer. The up-conversion luminescence make this compounds a promising candidate for simple and cost-effective materials for visible-to-ultraviolet converter devices.
{"title":"Ultraviolet up-conversion luminescent tetrahalozincates(II) with triphenylphosphonium cation: Synthesis, optical properties, and DFT calculations","authors":"Alexey S. Berezin","doi":"10.1016/j.mtchem.2024.102173","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102173","url":null,"abstract":"Luminescent [HL][ZnX] [X = Cl, Br] tetrahalozincate(II) compounds with triphenylphosphonium cation (HL = PhPH) were isolated using hydrohalic acids. This study reports the synthesis, crystal structures, and photophysical properties of novel tetrahalozincate(II) compounds. The [HL][ZnCl] and [HL][ZnBr] crystallize in the 2/ monoclinic and rhombic space groups, respectively. The compounds exhibit a strong ultraviolet (UV–B, λmax ≈ 290 nm) fluorescence and blue-green and green phosphorescence in solid state, with a high quantum efficiency (up to 78 %). The luminescence mechanism was investigated, revealing that the UV-B and green emissions are ascribed to the {ZnX}-{PhPH} exciton-phonon emission, and the blue-green emission arises from the transition within the organic moiety. The [HL][ZnCl] compound shows an unexpected up-conversion luminescence at 305 nm under 405 nm excitation, presumably caused by stepwise two-photon absorption accompanied by proton-coupled electron transfer. The up-conversion luminescence make this compounds a promising candidate for simple and cost-effective materials for visible-to-ultraviolet converter devices.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hydroxyapatite (HA) is a cornerstone bio ceramic in bone tissue engineering applications, prized for its inherent biocompatibility and structural resemblance to natural bone tissue. However, both porous and dense, conventional HA formulations face notable stability and mechanical robustness constraints, impeding their broader utility. We introduce an innovative biomaterial synthesized via a straightforward and efficient sol-gel method to surmount these challenges and imbue novel scaffolds with multifunctional capabilities. Leveraging a double doping strategy, our approach seeks to enhance mechanical performance and incorporate antibacterial features, maintaining the biocompatibility of HA-based scaffolds for advanced tissue engineering applications. In pursuit of this objective, we synthesized Ag-doped, Ag, Ti-doped, and Ti-doped HA samples to explore the impact of varying dopant types and concentrations on various structural, thermal, crystallographic, chemical, morphological, mechanical, and biocompatibility characteristics. X-ray Diffraction (XRD) analysis confirmed the presence of apatitic phase compositions across all samples, while Fourier-transform Infrared Spectroscopy (FTIR) data corroborated phosphate formation and functional group identification. Scanning Electron Microscopy (SEM) studies revealed a correlation between particle size and dopant concentration, consistent with XRD findings. Nanoindentation results indicated optimal mechanical performance was achieved with balanced incorporation of Ag and Ti ions despite increased Vickers microhardness with higher Ti concentrations. All doped samples exhibited effective antibacterial activity against () and (), except for the Ti-doped HA sample. Moreover, the HA sample co-doped with equal amounts of Ag and Ti demonstrated noncytotoxicity for human lung cancer (A549) cells. In contrast, all doped samples exhibited cytotoxicity towards human prostate cancer cell (PC3) cells. Statistical analysis confirmed a synergistic enhancement of biocompatibility and mechanical performance in HA samples doped with Ag and Ti ions in equal proportions. In conclusion, our study presents a simple and effective approach for enhancing HA's mechanical and antibacterial properties through co-doping with Ag and Ti. This innovative biomaterial holds significant promise for advancing bone tissue engineering applications.
羟基磷灰石（HA）是骨组织工程应用中的基石生物陶瓷，因其固有的生物相容性和与天然骨组织相似的结构而备受推崇。然而，无论是多孔还是致密，传统的 HA 配方都面临着明显的稳定性和机械坚固性限制，阻碍了其更广泛的应用。我们介绍了一种通过简单高效的溶胶-凝胶法合成的创新生物材料，以克服这些挑战并赋予新型支架以多功能性。利用双重掺杂策略，我们的方法旨在提高机械性能并加入抗菌功能，同时保持 HA 基支架的生物相容性，以用于先进的组织工程应用。为了实现这一目标，我们合成了掺银、掺银、掺钛和掺钛的 HA 样品，以探索不同掺杂剂类型和浓度对各种结构、热学、晶体学、化学、形态学、机械和生物相容性特征的影响。X 射线衍射（XRD）分析证实了所有样品中磷灰石相组成的存在，而傅立叶变换红外光谱（FTIR）数据则证实了磷酸盐的形成和官能团的识别。扫描电子显微镜（SEM）研究表明，颗粒大小与掺杂浓度之间存在相关性，这与 XRD 的研究结果一致。纳米压痕试验结果表明，尽管钛离子浓度越高，维氏硬度越大，但在均衡掺入 Ag 离子和钛离子的情况下，仍能获得最佳机械性能。除掺 Ti- 的 HA 样品外，所有掺杂样品都对 （）和 （）具有有效的抗菌活性。此外，掺杂了等量 Ag 和 Ti 的 HA 样品对人类肺癌（A549）细胞无细胞毒性。相比之下，所有掺杂样品都对人前列腺癌细胞（PC3）具有细胞毒性。统计分析证实，等比例掺杂银离子和钛离子的 HA 样品在生物相容性和机械性能方面具有协同增效作用。总之，我们的研究提出了一种简单有效的方法，通过共同掺杂 Ag 和 Ti 来增强 HA 的机械性能和抗菌性能。这种创新的生物材料有望推动骨组织工程应用的发展。
{"title":"Systematic investigation and controlled synthesis of Ag/Ti co-doped hydroxyapatite for bone tissue engineering","authors":"Hazal Gergeroglu, Mehmet Faruk Ebeoglugil, Sule Bayrak, Didem Aksu, Yavar Taghipour Azar","doi":"10.1016/j.mtchem.2024.102175","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102175","url":null,"abstract":"Hydroxyapatite (HA) is a cornerstone bio ceramic in bone tissue engineering applications, prized for its inherent biocompatibility and structural resemblance to natural bone tissue. However, both porous and dense, conventional HA formulations face notable stability and mechanical robustness constraints, impeding their broader utility. We introduce an innovative biomaterial synthesized via a straightforward and efficient sol-gel method to surmount these challenges and imbue novel scaffolds with multifunctional capabilities. Leveraging a double doping strategy, our approach seeks to enhance mechanical performance and incorporate antibacterial features, maintaining the biocompatibility of HA-based scaffolds for advanced tissue engineering applications. In pursuit of this objective, we synthesized Ag-doped, Ag, Ti-doped, and Ti-doped HA samples to explore the impact of varying dopant types and concentrations on various structural, thermal, crystallographic, chemical, morphological, mechanical, and biocompatibility characteristics. X-ray Diffraction (XRD) analysis confirmed the presence of apatitic phase compositions across all samples, while Fourier-transform Infrared Spectroscopy (FTIR) data corroborated phosphate formation and functional group identification. Scanning Electron Microscopy (SEM) studies revealed a correlation between particle size and dopant concentration, consistent with XRD findings. Nanoindentation results indicated optimal mechanical performance was achieved with balanced incorporation of Ag and Ti ions despite increased Vickers microhardness with higher Ti concentrations. All doped samples exhibited effective antibacterial activity against () and (), except for the Ti-doped HA sample. Moreover, the HA sample co-doped with equal amounts of Ag and Ti demonstrated noncytotoxicity for human lung cancer (A549) cells. In contrast, all doped samples exhibited cytotoxicity towards human prostate cancer cell (PC3) cells. Statistical analysis confirmed a synergistic enhancement of biocompatibility and mechanical performance in HA samples doped with Ag and Ti ions in equal proportions. In conclusion, our study presents a simple and effective approach for enhancing HA's mechanical and antibacterial properties through co-doping with Ag and Ti. This innovative biomaterial holds significant promise for advancing bone tissue engineering applications.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-25DOI: 10.1016/j.mtchem.2024.102166
Guoying Shi, Hongwei Fan, Weixuan Wang, Chengyi Hou, Qinghong Zhang, Yaogang Li, Hong Xiao, Guoliang Dai, Kerui Li, Hongzhi Wang
Flexible mid-infrared electrochromic devices (MIR-ECDs) have attracted wide attention due to the growing demands for thermal camouflage and body comfort. However, the normal conductive films (e.g., indium tin oxide/polyethylene terephthalate (ITO/PET) films) are unsuitable for MIR-ECDs due to low infrared transmittance. Herein, the infrared transparent carbon nanotube (CNT) grid films were prepared by designing the grid structure. The infrared transmittance of CNT grid film could reach 72 %; meanwhile, the visible transmittance could reach 75 %. The CNTs exhibited infrared modulation under different voltages due to the doping/de-doping of ions in electrolytes into the CNT network. The flexible electrochromic devices with visible to mid-infrared dual-band modulation were prepared by using CNT grid film as the electrode and poly (3,4 ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) as the electrochromic layer, which could realize the infrared synergistic modulation of PEDOT:PSS and CNT grid in the mid-infrared range and reversible color changes between light blue and dark blue in the visible range, showing promising applications in adaptive camouflage and thermal management.
{"title":"Carbon nanotube-grid infrared transparent electrodes for flexible electrochromic devices with visible to mid-infrared dual-band modulation","authors":"Guoying Shi, Hongwei Fan, Weixuan Wang, Chengyi Hou, Qinghong Zhang, Yaogang Li, Hong Xiao, Guoliang Dai, Kerui Li, Hongzhi Wang","doi":"10.1016/j.mtchem.2024.102166","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102166","url":null,"abstract":"Flexible mid-infrared electrochromic devices (MIR-ECDs) have attracted wide attention due to the growing demands for thermal camouflage and body comfort. However, the normal conductive films (e.g., indium tin oxide/polyethylene terephthalate (ITO/PET) films) are unsuitable for MIR-ECDs due to low infrared transmittance. Herein, the infrared transparent carbon nanotube (CNT) grid films were prepared by designing the grid structure. The infrared transmittance of CNT grid film could reach 72 %; meanwhile, the visible transmittance could reach 75 %. The CNTs exhibited infrared modulation under different voltages due to the doping/de-doping of ions in electrolytes into the CNT network. The flexible electrochromic devices with visible to mid-infrared dual-band modulation were prepared by using CNT grid film as the electrode and poly (3,4 ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) as the electrochromic layer, which could realize the infrared synergistic modulation of PEDOT:PSS and CNT grid in the mid-infrared range and reversible color changes between light blue and dark blue in the visible range, showing promising applications in adaptive camouflage and thermal management.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-25DOI: 10.1016/j.mtchem.2024.102168
Ahmed Essyed, Mohamed Alae Ait Kerroum, Sylvain Bertaina, Wafaa Azouzi, Ahmed Al Shami, Ismail Benabdallah, Hicham Labrim, Dris Ihiawakrim, Rachid Baati, Mohammed Benaissa
Manganese ferrite (MnFe2O4) stands out among multifunctional spinel ferrites for its attractive magnetic properties, high chemical stability and excellent biocompatibility, which are essential prerequisites for effective performance in various applications, including biomedical. However, very little work has been carried out on the ideal reaction conditions to obtain nanoparticles with high performance in terms of magnetization correlated to facet engineering. This study reports the synthesis of MnFe2O4 nanoparticles by a thermal decomposition process, controlling the decomposition temperature and the ligand/precursor ratio. Indeed, with a decomposition temperature of manganese stearate maintained at 270 °C and a ligand/precursor ratio equal to 2, superparamagnetic behavior and significantly high saturation magnetization were obtained from monodisperse nanoparticles of cubic shape and approximately 7 nm in size. Combining magnetic measurements with Monte Carlo simulations demonstrated that this behavior is attributed to the shape anisotropy of cubic nanoparticles, which favors the orientation of the magnetic moment along planar facets with low surface anisotropy. The strong influence of this faceting on the nanomagnetism of ferrite based on MnFe2O4 should open new avenues for numerous applications, particularly in biomedical imaging.
{"title":"Faceting effect on magnetism in manganese ferrites nanoparticles","authors":"Ahmed Essyed, Mohamed Alae Ait Kerroum, Sylvain Bertaina, Wafaa Azouzi, Ahmed Al Shami, Ismail Benabdallah, Hicham Labrim, Dris Ihiawakrim, Rachid Baati, Mohammed Benaissa","doi":"10.1016/j.mtchem.2024.102168","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102168","url":null,"abstract":"Manganese ferrite (MnFe2O4) stands out among multifunctional spinel ferrites for its attractive magnetic properties, high chemical stability and excellent biocompatibility, which are essential prerequisites for effective performance in various applications, including biomedical. However, very little work has been carried out on the ideal reaction conditions to obtain nanoparticles with high performance in terms of magnetization correlated to facet engineering. This study reports the synthesis of MnFe2O4 nanoparticles by a thermal decomposition process, controlling the decomposition temperature and the ligand/precursor ratio. Indeed, with a decomposition temperature of manganese stearate maintained at 270 °C and a ligand/precursor ratio equal to 2, superparamagnetic behavior and significantly high saturation magnetization were obtained from monodisperse nanoparticles of cubic shape and approximately 7 nm in size. Combining magnetic measurements with Monte Carlo simulations demonstrated that this behavior is attributed to the shape anisotropy of cubic nanoparticles, which favors the orientation of the magnetic moment along planar facets with low surface anisotropy. The strong influence of this faceting on the nanomagnetism of ferrite based on MnFe2O4 should open new avenues for numerous applications, particularly in biomedical imaging.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-25DOI: 10.1016/j.mtchem.2024.102172
Pengwei Wang, Chenshan Gao, Hongyuan Cui, Yufei Liu
Medical studies have shown that the concentration of NO exhaled by patients with obstructive pneumonia is significantly higher than that of healthy individuals. This study employs density functional theory (DFT) calculations to theoretically investigate the sensing performance of N or Pt elements doped tellurene structures for NO detection. Promising rapid early screening for this disease. The results indicate that doping enhances the electrical performance of tellurene structures, and N doping demonstrates superior advantages. Based on the changes in bandgap before and after gas adsorption, which directly affect the conductivity, a significant change in the electrical signal can be generated, providing sufficient detectable electrical response. Simultaneously, based on the N–Te doping structure and the interaction with NO gas, it is physical adsorption. Increasing the temperature can accelerate the desorption of gas molecules, which is beneficial for the reuse of the detection material. The research findings indicate excellent selectivity of NO gas over interfering gases (N, O, HO, and CO) during competitive adsorption. Furthermore, the N–Te doped structure significantly improves the adsorption efficiency for NO, with an adsorption energy of −1.74 eV and charge transfer of −0.37 e. Compared to the previously reported SnSe, SnP, and PdSe, the N–Te doped structure exhibits significant advantages. These results suggest that the N–Te doped structure has the potential to become a reliable sensing material for NO, with significant application potential in noninvasive and rapid detection of obstructive pneumonia.
医学研究表明，阻塞性肺炎患者呼出的 NO 浓度明显高于健康人。本研究采用密度泛函理论（DFT）计算方法，从理论上研究了掺杂 N 或 Pt 元素的碲结构在检测 NO 方面的传感性能。有望对这种疾病进行快速早期筛查。结果表明，掺杂能增强碲烯结构的电学性能，而掺杂 N 则显示出更优越的优势。气体吸附前后带隙的变化会直接影响电导率，基于这种变化，电信号会发生显著变化，从而提供足够的可检测电响应。同时，基于 N-Te 掺杂结构和与 NO 气体的相互作用，它是物理吸附。提高温度可以加速气体分子的解吸，有利于检测材料的重复使用。研究结果表明，在竞争吸附过程中，NO 气体对干扰气体（N、O、HO 和 CO）具有极佳的选择性。此外，掺杂 N-Te 结构显著提高了对 NO 的吸附效率，其吸附能为 -1.74 eV，电荷转移为 -0.37 e。这些结果表明，掺杂 N-Te 结构有望成为一种可靠的 NO 传感材料，在无创、快速检测阻塞性肺炎方面具有重要的应用潜力。
{"title":"Theoretical study on noninvasive detection of COPD disease exhaled gas molecules using N doped tellurene","authors":"Pengwei Wang, Chenshan Gao, Hongyuan Cui, Yufei Liu","doi":"10.1016/j.mtchem.2024.102172","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102172","url":null,"abstract":"Medical studies have shown that the concentration of NO exhaled by patients with obstructive pneumonia is significantly higher than that of healthy individuals. This study employs density functional theory (DFT) calculations to theoretically investigate the sensing performance of N or Pt elements doped tellurene structures for NO detection. Promising rapid early screening for this disease. The results indicate that doping enhances the electrical performance of tellurene structures, and N doping demonstrates superior advantages. Based on the changes in bandgap before and after gas adsorption, which directly affect the conductivity, a significant change in the electrical signal can be generated, providing sufficient detectable electrical response. Simultaneously, based on the N–Te doping structure and the interaction with NO gas, it is physical adsorption. Increasing the temperature can accelerate the desorption of gas molecules, which is beneficial for the reuse of the detection material. The research findings indicate excellent selectivity of NO gas over interfering gases (N, O, HO, and CO) during competitive adsorption. Furthermore, the N–Te doped structure significantly improves the adsorption efficiency for NO, with an adsorption energy of −1.74 eV and charge transfer of −0.37 e. Compared to the previously reported SnSe, SnP, and PdSe, the N–Te doped structure exhibits significant advantages. These results suggest that the N–Te doped structure has the potential to become a reliable sensing material for NO, with significant application potential in noninvasive and rapid detection of obstructive pneumonia.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-24DOI: 10.1016/j.mtchem.2024.102170
Xiaochun Hou, Teng Wan, Dangli Gao, Xiangyu Zhang, Chaoyang Jia, Chengxue Du, Ruipeng Chai, Qing Pang, Sining Yun, Yuhua Wang
Persistent phosphors, as a promising material for information storage and encryption, have garnered considerable attention owing to their rapid access and low-energy consumption. However, the lack of effective trap control in storage phosphors has resulted in limited storage capacity. In this study, we have prepared a series of NaLu(Gd)GeO:Bi,Ln (Ln = Eu, Tb, Dy, Pr, Sm, Er, Nd, Ho, Tm, and Yb) materials exhibiting tunable multimode and multicolor stimuli-responsive luminescence. The enhanced thermo-stimulated luminescence of five times is obtained in NaLuGeO:Bi,Eu relative to NaLuGeO:Bi, where Bi not only serves as the luminescent center but also as the hole trap center, and trace amounts of Eu act as electron traps to form stable electron-hole pair traps together with Bi hole traps. We propose a new method to improve trap density by constructing electron-hole pair traps via utilizing Bi and Ln as both trap makers and luminescence centers. Density functional theory calculations provide detailed information on the band structures of the matrix and electronic properties, which has confirmed the types of traps and then supports persistent luminescence mechanisms. Particularly, our phosphors are used as optical storage medium for multilevel optical data recording in a single physical layer through managing traps via setting the temperature. This study provides valuable insights for the design and fabrication of next-generation optical information storage and encryption materials.
持久性荧光粉作为一种很有前途的信息存储和加密材料，因其存取速度快、能耗低而备受关注。然而，由于存储荧光粉缺乏有效的阱控制，导致其存储能力有限。在这项研究中，我们制备了一系列 NaLu(Gd)GeO:Bi,Ln（Ln = Eu、Tb、Dy、Pr、Sm、Er、Nd、Ho、Tm 和 Yb）材料，这些材料具有可调的多模和多色刺激响应发光特性。与 NaLuGeO:Bi 相比，NaLuGeO:Bi,Eu 的热刺激发光增强了五倍，其中 Bi 不仅是发光中心，也是空穴陷阱中心，微量的 Eu 作为电子陷阱与 Bi 空穴陷阱一起形成稳定的电子-空穴对陷阱。我们提出了一种新方法，通过利用 Bi 和 Ln 同时作为陷阱制造者和发光中心来构建电子-空穴对陷阱，从而提高陷阱密度。密度泛函理论计算提供了有关基体能带结构和电子特性的详细信息，从而确认了陷阱的类型，进而支持了持续发光机制。特别是，我们的荧光粉可用作光学存储介质，通过设定温度管理陷阱，在单个物理层中记录多级光学数据。这项研究为设计和制造下一代光学信息存储和加密材料提供了宝贵的启示。
{"title":"Trap engineering in bismuth activated NaLu(Gd)GeO4 persistent phosphors by doping Ln3+","authors":"Xiaochun Hou, Teng Wan, Dangli Gao, Xiangyu Zhang, Chaoyang Jia, Chengxue Du, Ruipeng Chai, Qing Pang, Sining Yun, Yuhua Wang","doi":"10.1016/j.mtchem.2024.102170","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102170","url":null,"abstract":"Persistent phosphors, as a promising material for information storage and encryption, have garnered considerable attention owing to their rapid access and low-energy consumption. However, the lack of effective trap control in storage phosphors has resulted in limited storage capacity. In this study, we have prepared a series of NaLu(Gd)GeO:Bi,Ln (Ln = Eu, Tb, Dy, Pr, Sm, Er, Nd, Ho, Tm, and Yb) materials exhibiting tunable multimode and multicolor stimuli-responsive luminescence. The enhanced thermo-stimulated luminescence of five times is obtained in NaLuGeO:Bi,Eu relative to NaLuGeO:Bi, where Bi not only serves as the luminescent center but also as the hole trap center, and trace amounts of Eu act as electron traps to form stable electron-hole pair traps together with Bi hole traps. We propose a new method to improve trap density by constructing electron-hole pair traps via utilizing Bi and Ln as both trap makers and luminescence centers. Density functional theory calculations provide detailed information on the band structures of the matrix and electronic properties, which has confirmed the types of traps and then supports persistent luminescence mechanisms. Particularly, our phosphors are used as optical storage medium for multilevel optical data recording in a single physical layer through managing traps via setting the temperature. This study provides valuable insights for the design and fabrication of next-generation optical information storage and encryption materials.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-24DOI: 10.1016/j.mtchem.2024.102171
Linwei Li, Zihan Xing, Tao Liao, Jinyu Wang, Ziqiang Xu, Ying Kuang, Cao Li
Chemodynamic therapy (CDT) is a new cancer treatment that uses low-valence transition metal ions to catalyze intracellular Fenton/Fenton-like reactions, producing hydroxyl radicals (•OH) to eliminate cancer cells. However, achieving satisfactory therapeutic outcomes with CDT alone can be challenging. In this work, we reported an anticancer drug delivery DOX@HMDN-TQDs@PEI-PEG (DMTP) based on hollow mesoporous manganese dioxide nanoparticle (HMDN), which has the potential to improve cancer therapy by combining synergistic therapeutic and tumor magnetic resonance imaging (MRI) capability. After loading the anticancer drug doxorubicin hydrochloride (DOX), the pores of HMDN were sealed with polyethyleneimine (PEI) modified TiCT MXene quantum dots (TQDs) and finally modified with polyethylene glycol (PEG) to obtain the final system. HMDN depletes glutathione (GSH), which is harmful to CDT, in cancer cells, and generates Mn that can be used for both CDT and MRI. TQDs can also be used for highly effective photothermal therapy (PTT) that enhances CDT. The combination of DOX with chemotherapy can significantly inhibit tumor growth. In addition, DMTP combines the capability of tumor MRI as Mn is also a -weighted contrast agent. This multifunctional delivery system provides new ideas for research related to tumor diagnosis and treatment.
{"title":"Ti3C2Tx MXene quantum dots coated hollow manganese dioxide nanoparticles for tumor combination therapy and magnetic resonance imaging","authors":"Linwei Li, Zihan Xing, Tao Liao, Jinyu Wang, Ziqiang Xu, Ying Kuang, Cao Li","doi":"10.1016/j.mtchem.2024.102171","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102171","url":null,"abstract":"Chemodynamic therapy (CDT) is a new cancer treatment that uses low-valence transition metal ions to catalyze intracellular Fenton/Fenton-like reactions, producing hydroxyl radicals (•OH) to eliminate cancer cells. However, achieving satisfactory therapeutic outcomes with CDT alone can be challenging. In this work, we reported an anticancer drug delivery DOX@HMDN-TQDs@PEI-PEG (DMTP) based on hollow mesoporous manganese dioxide nanoparticle (HMDN), which has the potential to improve cancer therapy by combining synergistic therapeutic and tumor magnetic resonance imaging (MRI) capability. After loading the anticancer drug doxorubicin hydrochloride (DOX), the pores of HMDN were sealed with polyethyleneimine (PEI) modified TiCT MXene quantum dots (TQDs) and finally modified with polyethylene glycol (PEG) to obtain the final system. HMDN depletes glutathione (GSH), which is harmful to CDT, in cancer cells, and generates Mn that can be used for both CDT and MRI. TQDs can also be used for highly effective photothermal therapy (PTT) that enhances CDT. The combination of DOX with chemotherapy can significantly inhibit tumor growth. In addition, DMTP combines the capability of tumor MRI as Mn is also a -weighted contrast agent. This multifunctional delivery system provides new ideas for research related to tumor diagnosis and treatment.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-22DOI: 10.1016/j.mtchem.2024.102174
Na Chen, Yan Bai, Yuan Fang Li, Lei Zhan, Cheng Zhi Huang
Nitric oxide (NO)-based gas therapy has received ever-increasing attention in treatment of many diseases, especially cancer. However, the selective organelle targeted delivery and controllable release of NO remains highly desirable. In this work, a sequentially targeting delivery nanoplatform has been constructed by encapsulating heat-responsive -nitrosocysteine (the NO donor, SNC) conjugated mitochondria-targeting carbon dots (MitoCDs) and indocyanine green (ICG) within liposomes which are further modified with aptamer that can specifically bind to nucleolin overexpressed on the surface of several cancer cells. MitoCDs were prepared one-step hydrothermal reaction using citric acid and -diethylaminophenol as starting materials and used without any external targeting molecules. ICG molecules were employed as NIR-triggered photothermal agent followed by NO precisely controlled release in mitochondria. By combining gas and photothermal treatment, the nanocarrier produced a synergistic and superior killing effect on several cancer cell lines. And the cell growth inhibition of NCL-CSI@Lip on HEp-2 cells raised up to 72.39 %. Such an ‘all-in-one’ mitochondria-targeted NO nanocarrier may lead to new way for overcoming the problem of multidrug resistance in intracellular drug delivery.
基于一氧化氮（NO）的气体疗法在治疗多种疾病，尤其是癌症方面受到越来越多的关注。然而，一氧化氮的选择性细胞器靶向递送和可控释放仍然是非常理想的。在这项工作中，通过在脂质体中封装热响应-亚硝基半胱氨酸（NO 供体，SNC）共轭线粒体靶向碳点（MitoCDs）和吲哚菁绿（ICG），构建了一种顺序靶向递送纳米平台。MitoCDs 以柠檬酸和二乙氨基苯酚为起始原料，通过一步水热反应制备而成，使用时不含任何外部靶向分子。利用 ICG 分子作为近红外触发光热剂，然后在线粒体中精确控制释放 NO。通过将气体和光热处理相结合，纳米载体对多种癌细胞株产生了协同和卓越的杀伤效果。NCL-CSI@Lip对HEp-2细胞的生长抑制率高达72.39%。这种 "多合一 "的线粒体靶向 NO 纳米载体可能为克服细胞内给药的多药耐药性问题提供新的途径。
{"title":"NIR-light controlled local delivery of nitric oxide based on self-targeting carbon dots","authors":"Na Chen, Yan Bai, Yuan Fang Li, Lei Zhan, Cheng Zhi Huang","doi":"10.1016/j.mtchem.2024.102174","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102174","url":null,"abstract":"Nitric oxide (NO)-based gas therapy has received ever-increasing attention in treatment of many diseases, especially cancer. However, the selective organelle targeted delivery and controllable release of NO remains highly desirable. In this work, a sequentially targeting delivery nanoplatform has been constructed by encapsulating heat-responsive -nitrosocysteine (the NO donor, SNC) conjugated mitochondria-targeting carbon dots (MitoCDs) and indocyanine green (ICG) within liposomes which are further modified with aptamer that can specifically bind to nucleolin overexpressed on the surface of several cancer cells. MitoCDs were prepared one-step hydrothermal reaction using citric acid and -diethylaminophenol as starting materials and used without any external targeting molecules. ICG molecules were employed as NIR-triggered photothermal agent followed by NO precisely controlled release in mitochondria. By combining gas and photothermal treatment, the nanocarrier produced a synergistic and superior killing effect on several cancer cell lines. And the cell growth inhibition of NCL-CSI@Lip on HEp-2 cells raised up to 72.39 %. Such an ‘all-in-one’ mitochondria-targeted NO nanocarrier may lead to new way for overcoming the problem of multidrug resistance in intracellular drug delivery.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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