Pub Date : 2024-10-01DOI: 10.1016/j.chphma.2024.06.005
Na Li , Chenggang Wang , Xixi Zhang , Chuanlin Li , Guangmeng Qu , Xiao Wang , Xijin Xu
The capacity and cycling performance of cathodes are key factors in aqueous zinc batteries (AZBs). The search for cathode materials with long cycle lives and high specific capacities is of paramount importance. In this study, a bimetallic telluride with a hollow polyhedral structure was synthesized using a hydrothermal method followed by vapor deposition. This composite exhibits high conductivity, facilitates rapid diffusion of electrolyte ions into the interior, and accelerates redox reactions, thereby enhancing electrochemical performance. The CoTe2-NiTe2 electrode demonstrates an impressive specific capacity of 188.8 mAh/g at 1 A/g, highlighting its efficiency in storing a significant amount of charge per unit mass during electrochemical reactions. The assembled CoTe2-NiTe2//Zn battery shows favorable capacity retention (76.4%) after 10000 cycles. The energy density is remarkably high, reaching 290.3 Wh/kg, while maintaining a power density of 1.75 kW/kg. This bimetallic telluride strategy holds great promise as an alternative cathode for AZBs.
{"title":"High-performance alkaline aqueous zinc battery enabled by nickel-cobalt-tellurium materials","authors":"Na Li , Chenggang Wang , Xixi Zhang , Chuanlin Li , Guangmeng Qu , Xiao Wang , Xijin Xu","doi":"10.1016/j.chphma.2024.06.005","DOIUrl":"10.1016/j.chphma.2024.06.005","url":null,"abstract":"<div><div>The capacity and cycling performance of cathodes are key factors in aqueous zinc batteries (AZBs). The search for cathode materials with long cycle lives and high specific capacities is of paramount importance. In this study, a bimetallic telluride with a hollow polyhedral structure was synthesized using a hydrothermal method followed by vapor deposition. This composite exhibits high conductivity, facilitates rapid diffusion of electrolyte ions into the interior, and accelerates redox reactions, thereby enhancing electrochemical performance. The CoTe<sub>2</sub>-NiTe<sub>2</sub> electrode demonstrates an impressive specific capacity of 188.8 mAh/g at 1 A/g, highlighting its efficiency in storing a significant amount of charge per unit mass during electrochemical reactions. The assembled CoTe<sub>2</sub>-NiTe<sub>2</sub>//Zn battery shows favorable capacity retention (76.4%) after 10000 cycles. The energy density is remarkably high, reaching 290.3 Wh/kg, while maintaining a power density of 1.75 kW/kg. This bimetallic telluride strategy holds great promise as an alternative cathode for AZBs.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 415-421"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-01DOI: 10.1016/j.chphma.2024.06.006
Dholon Kumar Paul, Wajiha Tarannum Chaudhry, S M Naimul Mamun, M.L. Rahman, A F M Yusuf Haider, Firoze H. Haque
The emergence of lead-free halide double perovskites exhibiting bandgaps within the visible spectrum represents a substantial advancement in engineering environmentally benign perovskite solar cells. In this work, we investigated the structural, optical, electronic, and mechanical properties of Cs-based lead-free Cs2LiGaBr6 double halide perovskites with Mn and Cr doping under hydrostatic pressure ranging from 2 to 80 GPa using density functional theory (DFT). The introduction of dopants consistently alters the lattice parameters because of the mismatch in atomic radii, whereas increasing the pressure leads to a reduction in these constants. All the studied Cs2LiGaBr6 compounds exhibited direct band gaps, which increased slightly with doping. This is attributed to the modulation of electronic states by dopant-related defect levels. The bandgap variation under pressure is primarily attributed to changes in the quantum confinement effects induced by compressive strain. Analysis of the density of states and optical properties revealed enhanced absorption in the visible spectrum for the doped compositions, and in the UV spectrum under pressure. The study of mechanical stability confirms the ductile nature of both the doped and pristine compounds under pressure, underscoring their suitability for thin film production. This study contributes to the understanding of sustainable alternatives for perovskite optoelectronic applications, emphasizing Cs2LiGaBr6's potential under diverse conditions and dopant influences.
{"title":"Impact of doping and hydrostatic pressure on structural, electronic, optical, and mechanical properties of novel double halide perovskite Cs2LiGaBr6","authors":"Dholon Kumar Paul, Wajiha Tarannum Chaudhry, S M Naimul Mamun, M.L. Rahman, A F M Yusuf Haider, Firoze H. Haque","doi":"10.1016/j.chphma.2024.06.006","DOIUrl":"10.1016/j.chphma.2024.06.006","url":null,"abstract":"<div><div>The emergence of lead-free halide double perovskites exhibiting bandgaps within the visible spectrum represents a substantial advancement in engineering environmentally benign perovskite solar cells. In this work, we investigated the structural, optical, electronic, and mechanical properties of Cs-based lead-free Cs<sub>2</sub>LiGaBr<sub>6</sub> double halide perovskites with Mn and Cr doping under hydrostatic pressure ranging from 2 to 80 GPa using density functional theory (DFT). The introduction of dopants consistently alters the lattice parameters because of the mismatch in atomic radii, whereas increasing the pressure leads to a reduction in these constants. All the studied Cs<sub>2</sub>LiGaBr<sub>6</sub> compounds exhibited direct band gaps, which increased slightly with doping. This is attributed to the modulation of electronic states by dopant-related defect levels. The bandgap variation under pressure is primarily attributed to changes in the quantum confinement effects induced by compressive strain. Analysis of the density of states and optical properties revealed enhanced absorption in the visible spectrum for the doped compositions, and in the UV spectrum under pressure. The study of mechanical stability confirms the ductile nature of both the doped and pristine compounds under pressure, underscoring their suitability for thin film production. This study contributes to the understanding of sustainable alternatives for perovskite optoelectronic applications, emphasizing Cs<sub>2</sub>LiGaBr<sub>6</sub>'s potential under diverse conditions and dopant influences.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 422-430"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supercapacitors have garnered significant attention due to their superior power density, excellent cycle stability, and fast charge/discharge rates. The properties of the electrode materials determine the charge storage performance of supercapacitors. Covalent organic frameworks (COFs) are a novel class of crystalline porous polymer materials with uniform nanoscale pores, large specific surface areas, and tunable redox-active groups within the framework, which can be tuned to suit specific applications. They have flexible molecular designs and synthetic strategies, demonstrating their strong application potential in the field of energy storage. Most COFs exhibit poor inherent conductivity and low utilization of active sites, resulting in incomplete electrochemical performance. Hybrid systems can be developed by incorporating redox-active groups, hydrogen bonding, or combining COFs with other materials to improve the energy storage performance of COFs materials. In this review article, the background of COFs is summarized, including a brief introduction, design strategy, and synthesis methods. It also discusses their applications in supercapacitors and is categorized into: pristine COFs, modified COFs, and COF matrix composites. Finally, the review addresses the challenges that remain for the practical application of these materials in supercapacitors.
{"title":"Application of covalent organic frameworks as electrode materials for supercapacitors","authors":"Yanmin Wan , Baoshou Shen , Xiaoli Zhu , Zhongming Guo","doi":"10.1016/j.chphma.2024.08.002","DOIUrl":"10.1016/j.chphma.2024.08.002","url":null,"abstract":"<div><div>Supercapacitors have garnered significant attention due to their superior power density, excellent cycle stability, and fast charge/discharge rates. The properties of the electrode materials determine the charge storage performance of supercapacitors. Covalent organic frameworks (COFs) are a novel class of crystalline porous polymer materials with uniform nanoscale pores, large specific surface areas, and tunable redox-active groups within the framework, which can be tuned to suit specific applications. They have flexible molecular designs and synthetic strategies, demonstrating their strong application potential in the field of energy storage. Most COFs exhibit poor inherent conductivity and low utilization of active sites, resulting in incomplete electrochemical performance. Hybrid systems can be developed by incorporating redox-active groups, hydrogen bonding, or combining COFs with other materials to improve the energy storage performance of COFs materials. In this review article, the background of COFs is summarized, including a brief introduction, design strategy, and synthesis methods. It also discusses their applications in supercapacitors and is categorized into: pristine COFs, modified COFs, and COF matrix composites. Finally, the review addresses the challenges that remain for the practical application of these materials in supercapacitors.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 388-414"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-01DOI: 10.1016/j.chphma.2024.07.002
K.V. Nadaraia, D.V. Mashtalyar, M.A. Piatkova, A.I. Pleshkova, I.M. Imshinetskiy, M.S. Gerasimenko, E.A. Belov, G.A. Zverev, S.L. Sinebryukhov, S.V. Gnedenkov
Additive manufacturing has revolutionized implantology by enabling the fabrication of customized, highly porous implants. Surface modifications using electrochemical methods can significantly enhance the bioactivity and biocompatibility of biomaterials, including 3D-printed implants. This study investigates novel coatings on 3D titanium (Ti) samples. Mesh Ti samples were designed and subjected to plasma electrolytic oxidation (PEO) to form a calcium phosphate coating. Subsequently, a layer of polydopamine (PDA) was applied. The electrochemical properties and morphology of the coatings were analyzed. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) revealed well-developed coatings containing calcium phosphates (including hydroxyapatite), titanium dioxide, and polymerized dopamine, suggesting promising bioactive potential. Composite layers incorporating PDA exhibited superior protective properties compared to base PEO coatings.
增材制造技术通过制造定制化、高多孔性植入体，为植入学带来了革命性的变化。使用电化学方法进行表面改性可显著提高生物材料（包括三维打印植入物）的生物活性和生物相容性。本研究调查了三维钛（Ti）样品上的新型涂层。设计了网状钛样品，并对其进行等离子电解氧化（PEO）以形成磷酸钙涂层。随后，涂上一层聚多巴胺（PDA）。对涂层的电化学特性和形态进行了分析。扫描电子显微镜（SEM）和能量色散 X 射线光谱（EDS）显示，涂层发育良好，含有磷酸钙（包括羟基磷灰石）、二氧化钛和聚合多巴胺，具有良好的生物活性潜力。与基础 PEO 涂层相比，含有 PDA 的复合层具有更优越的保护性能。
{"title":"A first look at the formation of PEO-PDA coatings on 3D titanium","authors":"K.V. Nadaraia, D.V. Mashtalyar, M.A. Piatkova, A.I. Pleshkova, I.M. Imshinetskiy, M.S. Gerasimenko, E.A. Belov, G.A. Zverev, S.L. Sinebryukhov, S.V. Gnedenkov","doi":"10.1016/j.chphma.2024.07.002","DOIUrl":"10.1016/j.chphma.2024.07.002","url":null,"abstract":"<div><div>Additive manufacturing has revolutionized implantology by enabling the fabrication of customized, highly porous implants. Surface modifications using electrochemical methods can significantly enhance the bioactivity and biocompatibility of biomaterials, including 3D-printed implants. This study investigates novel coatings on 3D titanium (Ti) samples. Mesh Ti samples were designed and subjected to plasma electrolytic oxidation (PEO) to form a calcium phosphate coating. Subsequently, a layer of polydopamine (PDA) was applied. The electrochemical properties and morphology of the coatings were analyzed. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) revealed well-developed coatings containing calcium phosphates (including hydroxyapatite), titanium dioxide, and polymerized dopamine, suggesting promising bioactive potential. Composite layers incorporating PDA exhibited superior protective properties compared to base PEO coatings.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 451-461"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-01DOI: 10.1016/j.chphma.2024.06.008
Mohammed Ouachekradi, Mohammed Elkabous, Yasser Karzazi
Dye-sensitized solar cells (DSSCs) have gained critical importance as a leading emerging photovoltaic technology for low-cost power generation due to their simple production, light weight, applicability to the development of flexible photovoltaic devices, and use of abundant and inexpensive materials, including advantageous metal-free organic dyes. In this context, as a continuation of our work on DSSCs, a theoretical examination using density functional theory (DFT) and time-dependent density functional theory (TD-DFT) was conducted to evaluate the photovoltaic performance of eight new organic dyes. Each dye contains an electron donor group ((E)-2-(2-(thiophen-3-yl)vinyl)-1,1′-bipyrrole), an electron acceptor group (cyanoacrylic acid (CCA)), and four auxiliary donor/acceptor groups, i.e., 3,4-ethylenedioxythiophene (EDOT), furan/benzothiadiazole (BTZ), diketopyrrolopyrrole (DPP) linked to π-conjugated bridges such as styrene or thiophene. We calculated several parameters for each dye, including EHOMO, ELUMO, Egap, λmax, Eex, pen-circuit photovoltage (VOC), light harvesting efficiency (LHE), regeneration driving force (ΔGreg), electron injection driving force (ΔGinject), and excitation lifetime (τ) to determine the photovoltaic efficiency of each dye. The results showed that the new dyes exhibited good performance and remarkable energy-conversion efficiencies. Additionally, all investigated dyes posed as promising candidates for the generation of effective DSSC sensitizers, particularly M6, which contained a styrene-linked EDOT auxiliary donor group.
{"title":"Theoretical study on the efficiency of new organic dyes based on (E)-2-(2-(thiophen-3-yl)vinyl)-1,1′-bipyrrole as dye-sensitized solar cell sensitizers","authors":"Mohammed Ouachekradi, Mohammed Elkabous, Yasser Karzazi","doi":"10.1016/j.chphma.2024.06.008","DOIUrl":"10.1016/j.chphma.2024.06.008","url":null,"abstract":"<div><div>Dye-sensitized solar cells (DSSCs) have gained critical importance as a leading emerging photovoltaic technology for low-cost power generation due to their simple production, light weight, applicability to the development of flexible photovoltaic devices, and use of abundant and inexpensive materials, including advantageous metal-free organic dyes. In this context, as a continuation of our work on DSSCs, a theoretical examination using density functional theory (DFT) and time-dependent density functional theory (TD-DFT) was conducted to evaluate the photovoltaic performance of eight new organic dyes. Each dye contains an electron donor group ((<em>E</em>)-2-(2-(thiophen-3-yl)vinyl)-1,1′-bipyrrole), an electron acceptor group (cyanoacrylic acid (CCA)), and four auxiliary donor/acceptor groups, i.e., 3,4-ethylenedioxythiophene (EDOT), furan/benzothiadiazole (BTZ), diketopyrrolopyrrole (DPP) linked to π-conjugated bridges such as styrene or thiophene. We calculated several parameters for each dye, including <em>E</em><sub>HOMO</sub>, <em>E</em><sub>LUMO</sub>, <em>E</em><sub>gap</sub>, <em>λ</em><sub>max</sub>, <em>E</em><sub>ex</sub>, pen-circuit photovoltage (<em>V</em><sub>OC</sub>), light harvesting efficiency (<em>LHE</em>), regeneration driving force (Δ<em>G</em><sub>reg</sub>), electron injection driving force (Δ<em>G</em><sub>inject</sub>), and excitation lifetime (<em>τ</em>) to determine the photovoltaic efficiency of each dye. The results showed that the new dyes exhibited good performance and remarkable energy-conversion efficiencies. Additionally, all investigated dyes posed as promising candidates for the generation of effective DSSC sensitizers, particularly M<sub>6</sub>, which contained a styrene-linked EDOT auxiliary donor group.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 440-450"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141851530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-01DOI: 10.1016/j.chphma.2024.07.006
Rong Wang , Chongling Cheng , Huiyun Wang , Dayang Wang
Hydrogels, which are three-dimensional networks of crosslinked hydrophilic polymers, have become crucial for various advanced applications owing to their exceptional water absorption and swelling properties. This review explores the applications of hydrogels based on their unique swelling properties, beyond their application in traditional drug delivery, focusing on atmospheric water harvesting, hydrogel actuator, expansion microscopy (ExM), and 3D nanofabrication through controlled deswelling. We first discuss the factors influencing hydrogel swelling, such as network size and polymer properties. Next, we explore the mechanisms underlying hydrogel swelling, emphasizing the interplay between various forces. Hydrogel swelling enables ExM for super-resolution imaging of biological tissues, while controlled deswelling of hydrogels facilitates the creation of intricate 3D structures with nanoscale precision—a breakthrough for additive manufacturing techniques. Despite these advantages, challenges still remain. We conclude this review by emphasizing the need for interdisciplinary research to address these limitations and unlock the full potential of the hydrogel technology. The future of hydrogel research holds promise for revolutionary contributions to environmental science, robotics, and biomedical imaging.
{"title":"Swollen hydrogel nanotechnology: Advanced applications of the rudimentary swelling properties of hydrogels","authors":"Rong Wang , Chongling Cheng , Huiyun Wang , Dayang Wang","doi":"10.1016/j.chphma.2024.07.006","DOIUrl":"10.1016/j.chphma.2024.07.006","url":null,"abstract":"<div><div>Hydrogels, which are three-dimensional networks of crosslinked hydrophilic polymers, have become crucial for various advanced applications owing to their exceptional water absorption and swelling properties. This review explores the applications of hydrogels based on their unique swelling properties, beyond their application in traditional drug delivery, focusing on atmospheric water harvesting, hydrogel actuator, expansion microscopy (ExM), and 3D nanofabrication through controlled deswelling. We first discuss the factors influencing hydrogel swelling, such as network size and polymer properties. Next, we explore the mechanisms underlying hydrogel swelling, emphasizing the interplay between various forces. Hydrogel swelling enables ExM for super-resolution imaging of biological tissues, while controlled deswelling of hydrogels facilitates the creation of intricate 3D structures with nanoscale precision—a breakthrough for additive manufacturing techniques. Despite these advantages, challenges still remain. We conclude this review by emphasizing the need for interdisciplinary research to address these limitations and unlock the full potential of the hydrogel technology. The future of hydrogel research holds promise for revolutionary contributions to environmental science, robotics, and biomedical imaging.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 357-375"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-01DOI: 10.1016/j.chphma.2024.07.001
Yuge Zhang , Qian Liu , Deliang Zhang , Yue Hong , Qiang Li
Two-dimensional (2D) layered materials with unique physicochemical properties, such as graphene, transition metal dichalcogenides, and hexagonal boron nitride, have shown considerable potential in the electrical and electronics industries as well as society. To realize the practical applications of 2D materials, the size, shape, and edge structures must be refined. Etching is a critical processing step in the semiconducting industry and its potential as an efficient approach for fabricating diverse nanostructures of 2D materials has been demonstrated, broadening their applications in the field of nanoelectronics. In this paper, we present an overview of recent advances in anisotropic etching of various 2D materials. Anisotropic etching and the associated mechanisms are discussed in context of the synthesis, processing, and characterization of 2D materials. An overview of the applications of anisotropic etched 2D materials is provided. Finally, the challenges and future opportunities for anisotropic etching of 2D materials are discussed.
{"title":"Anisotropic etching of 2D layered materials","authors":"Yuge Zhang , Qian Liu , Deliang Zhang , Yue Hong , Qiang Li","doi":"10.1016/j.chphma.2024.07.001","DOIUrl":"10.1016/j.chphma.2024.07.001","url":null,"abstract":"<div><div>Two-dimensional (2D) layered materials with unique physicochemical properties, such as graphene, transition metal dichalcogenides, and hexagonal boron nitride, have shown considerable potential in the electrical and electronics industries as well as society. To realize the practical applications of 2D materials, the size, shape, and edge structures must be refined. Etching is a critical processing step in the semiconducting industry and its potential as an efficient approach for fabricating diverse nanostructures of 2D materials has been demonstrated, broadening their applications in the field of nanoelectronics. In this paper, we present an overview of recent advances in anisotropic etching of various 2D materials. Anisotropic etching and the associated mechanisms are discussed in context of the synthesis, processing, and characterization of 2D materials. An overview of the applications of anisotropic etched 2D materials is provided. Finally, the challenges and future opportunities for anisotropic etching of 2D materials are discussed.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 341-356"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141849884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Concerns regarding human health and food safety have generated interest in developing simple, accurate, and cost-effective strategies for evaluating organophosphorus pesticide (OP) residues. In this study, nitrogen-doped carbon dots (N-CDs) were synthesized from a common low-cost precursor via a simple pyrolysis process. The fluorescence of the N-CDs can be suppressed by p-nitrophenol, which is the hydrolysis product of the p-nitrophenyl phosphate salt catalyzed by alkaline phosphatase (ALP). A fluorescent turn-on assay for the inhibitory effect of glyphosate was developed with a low detection limit and wide linear range. Moreover, the feasibility of visualizing OPs in vegetables was demonstrated by the fluorescence imaging of glyphosate on cabbage leaves. This research not only offers a facile method for the synthesis of highly fluorescent CDs but also inspires the development of effective multi-mode sensing platforms that include fluorescent testing and imaging for monitoring pesticide residues.
对人类健康和食品安全的担忧激发了人们对开发简单、准确、经济高效的有机磷农药（OP）残留评估策略的兴趣。在这项研究中，通过简单的热解过程，用一种常见的低成本前体合成了掺氮碳点（N-CDs）。N-CDs 的荧光可被对硝基苯酚抑制，对硝基苯酚是对硝基苯磷酸酯盐在碱性磷酸酶（ALP）催化下的水解产物。针对草甘膦的抑制作用开发了一种荧光开启测定法，其检测限低、线性范围宽。此外，通过对甘蓝叶片上草甘膦的荧光成像，证明了对蔬菜中 OPs 进行可视化的可行性。这项研究不仅为高荧光 CD 的合成提供了简便的方法，还为开发有效的多模式传感平台（包括荧光检测和成像以监测农药残留）提供了启发。
{"title":"Nitrogen-doped carbon dots as efficient turn-on fluorescent probe for assay of organophosphorus pesticides","authors":"Jiqing Zhang, Shushu Chu, Chenyu Tao, Jinghao Yan, Yuanyuan Jiang, Yizhong Lu","doi":"10.1016/j.chphma.2024.07.003","DOIUrl":"10.1016/j.chphma.2024.07.003","url":null,"abstract":"<div><div>Concerns regarding human health and food safety have generated interest in developing simple, accurate, and cost-effective strategies for evaluating organophosphorus pesticide (OP) residues. In this study, nitrogen-doped carbon dots (N-CDs) were synthesized from a common low-cost precursor via a simple pyrolysis process. The fluorescence of the N-CDs can be suppressed by p-nitrophenol, which is the hydrolysis product of the p-nitrophenyl phosphate salt catalyzed by alkaline phosphatase (ALP). A fluorescent turn-on assay for the inhibitory effect of glyphosate was developed with a low detection limit and wide linear range. Moreover, the feasibility of visualizing OPs in vegetables was demonstrated by the fluorescence imaging of glyphosate on cabbage leaves. This research not only offers a facile method for the synthesis of highly fluorescent CDs but also inspires the development of effective multi-mode sensing platforms that include fluorescent testing and imaging for monitoring pesticide residues.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 462-469"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-01DOI: 10.1016/j.chphma.2024.07.004
Qing Yang Steve Wu , Nan Zhang , Vincent Lim , Lei Zhang , Yu Zhong , Benjamin Russell , Lin Ke
Terahertz (THz) computed tomography (THz CT) exhibits the potential to provide a wealth of data, surpassing that of THz tomographic imaging in applications such as detecting embedded defects, particularly defect evolution within a glass fiber-reinforced polymer. To realize high-resolution THz CT, a systematic approach guided by wave propagation simulation was employed. First, the front wave of the THz beam was fine-tuned to realize a beam diameter of <2 mm. To mitigate the strong refractive effect and minimize Fresnel reflection loss, a refractive-index-matching material was fabricated and utilized as a rounded enclosure for samples with sharp corners. To further improve the reconstruction resolution, a flat surface enclosure was applied to collect all incident beams at the detector. To realize comparable results to those of full-angle CT, a limited-angle CT approach was implemented, and the frequency range 0.1–3 THz was used in the image reconstruction study. The experimental and simulated images were used to validate the findings, and conductive and non-conductive defects measuring 200 µm were successfully visualized. Additionally, a custom-built user interface enabled us to visualize the field spatial distribution of the THz beam with respect to frequency.
{"title":"Detection of a glass fiber-reinforced polymer with defects by terahertz computed tomography","authors":"Qing Yang Steve Wu , Nan Zhang , Vincent Lim , Lei Zhang , Yu Zhong , Benjamin Russell , Lin Ke","doi":"10.1016/j.chphma.2024.07.004","DOIUrl":"10.1016/j.chphma.2024.07.004","url":null,"abstract":"<div><div>Terahertz (THz) computed tomography (THz CT) exhibits the potential to provide a wealth of data, surpassing that of THz tomographic imaging in applications such as detecting embedded defects, particularly defect evolution within a glass fiber-reinforced polymer. To realize high-resolution THz CT, a systematic approach guided by wave propagation simulation was employed. First, the front wave of the THz beam was fine-tuned to realize a beam diameter of <2 mm. To mitigate the strong refractive effect and minimize Fresnel reflection loss, a refractive-index-matching material was fabricated and utilized as a rounded enclosure for samples with sharp corners. To further improve the reconstruction resolution, a flat surface enclosure was applied to collect all incident beams at the detector. To realize comparable results to those of full-angle CT, a limited-angle CT approach was implemented, and the frequency range 0.1–3 THz was used in the image reconstruction study. The experimental and simulated images were used to validate the findings, and conductive and non-conductive defects measuring 200 µm were successfully visualized. Additionally, a custom-built user interface enabled us to visualize the field spatial distribution of the THz beam with respect to frequency.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 470-480"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-01DOI: 10.1016/j.chphma.2024.06.007
Xin-Yu Yu , Qian Wang , Hui-Lin Li , Yi-Jun Wan , En-Meng Liang , Chun-Ming Wang
Owing to their exceptional piezoelectric effects, piezoelectric materials play a crucial role in high-end technologies and contribute significantly to the national economy. Bismuth layer-structured ferroelectrics (BLSFs) possess high Curie temperatures, making them a focal point of research in high-temperature piezoelectric sensor devices. However, their poor piezoelectric performance and low direct-current (DC) electrical resistivity hinder their effective deployment in high-temperature applications. To overcome these shortcomings, we employed composition optimization by partially substituting bismuth ions with rare-earth praseodymium ions. This approach enhances the piezoelectric performance and improves the DC electrical resistivity by preventing the loss of volatile bismuth ions and stabilizing the bismuth oxide layer (Bi2O2)2+, thereby reducing the concentration of oxygen vacancies. Consequently, we achieved a large piezoelectric constant d33 of 23.5 pC/N in praseodymium-substituted Bi5Ti3FeO15, which is three times higher than that of pure Bi5Ti3FeO15 (7.1 pC/N), along with a high Curie temperature TC of 778 °C. Additionally, the optimal composition of 4 mol% praseodymium-substituted Bi5Ti3FeO15 exhibits good thermal stability of electromechanical coupling characteristics up to 300 °C. This study holds promise for a wide array of high-temperature piezoelectric applications and has the potential to accelerate the development of high-temperature piezoelectric sensor technologies.
{"title":"Rare-earth praseodymium-substituted Bi5Ti3FeO15 exhibiting enhanced piezoelectric properties for high-temperature application","authors":"Xin-Yu Yu , Qian Wang , Hui-Lin Li , Yi-Jun Wan , En-Meng Liang , Chun-Ming Wang","doi":"10.1016/j.chphma.2024.06.007","DOIUrl":"10.1016/j.chphma.2024.06.007","url":null,"abstract":"<div><div>Owing to their exceptional piezoelectric effects, piezoelectric materials play a crucial role in high-end technologies and contribute significantly to the national economy. Bismuth layer-structured ferroelectrics (BLSFs) possess high Curie temperatures, making them a focal point of research in high-temperature piezoelectric sensor devices. However, their poor piezoelectric performance and low direct-current (DC) electrical resistivity hinder their effective deployment in high-temperature applications. To overcome these shortcomings, we employed composition optimization by partially substituting bismuth ions with rare-earth praseodymium ions. This approach enhances the piezoelectric performance and improves the DC electrical resistivity by preventing the loss of volatile bismuth ions and stabilizing the bismuth oxide layer (Bi<sub>2</sub>O<sub>2</sub>)<sup>2+</sup>, thereby reducing the concentration of oxygen vacancies. Consequently, we achieved a large piezoelectric constant <em>d</em><sub>33</sub> of 23.5 pC/N in praseodymium-substituted Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub>, which is three times higher than that of pure Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub> (7.1 pC/N), along with a high Curie temperature <em>T</em><sub>C</sub> of 778 °C. Additionally, the optimal composition of 4 mol% praseodymium-substituted Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub> exhibits good thermal stability of electromechanical coupling characteristics up to 300 °C. This study holds promise for a wide array of high-temperature piezoelectric applications and has the potential to accelerate the development of high-temperature piezoelectric sensor technologies.</div></div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"3 4","pages":"Pages 431-439"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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