In this work, a simple combustion method was proposed for the controllable synthesis of TiO2/C composites, which can achieve both the efficient solar water evaporation at the interface and photocatalytic H2O2 production. Structural and morphological characteristic indicated the co-existence of carbon quantum dots and amorphous carbon, which were well distributed on the surface of the TiO2. TiO2/C composites displayed the enhanced visible light absorption and the rapid separation of photogenerated electron-hole pairs. TiO2/C-10 exhibited an excellent photocatalytic H2O2 production activity of 3068.46 μmol/g/h under the simulated solar irradiation. Besides, its water evaporation rate reached up to 5.81 kg·m−2·h−1 under the simulated solar irradiation.
{"title":"Combustion synthesis of TiO2/C composites for enhanced photocatalytic H2O2 production and solar steam evaporation efficiency","authors":"Yunyun Gong, Yali Cao, Yuanyuan Feng, Wenmiao Zhu, Qinying Li, Meichao Gao","doi":"10.1016/j.matlet.2024.137617","DOIUrl":"10.1016/j.matlet.2024.137617","url":null,"abstract":"<div><div>In this work, a simple combustion method was proposed for the controllable synthesis of TiO<sub>2</sub>/C composites, which can achieve both the efficient solar water evaporation at the interface and photocatalytic H<sub>2</sub>O<sub>2</sub> production. Structural and morphological characteristic indicated the co-existence of carbon quantum dots and amorphous carbon, which were well distributed on the surface of the TiO<sub>2</sub>. TiO<sub>2</sub>/C composites displayed the enhanced visible light absorption and the rapid separation of photogenerated electron-hole pairs. TiO<sub>2</sub>/C-10 exhibited an excellent photocatalytic H<sub>2</sub>O<sub>2</sub> production activity of 3068.46 μmol/g/h under the simulated solar irradiation. Besides, its water evaporation rate reached up to 5.81 kg·m<sup>−2</sup>·h<sup>−1</sup> under the simulated solar irradiation.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137617"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-26DOI: 10.1016/j.matlet.2024.137609
Xinhao Sun , Hao Wang , Jun Zhou , Zhifeng Wang , Chunling Qin
By tactfully utilizing the different chemical characteristics of Bi and Ni element in the electrodeposition process, this work successfully designs a novel free-standing NiO/Bi@Bi2O3 hybrid electrode with dual electroactive components (NiO and Bi@Bi2O3) and hierarchically porous structure. After co-electrodeposition, the porous Bi metal as a conductive skeleton can effectively improve the electrical conductivity of the electrode. Moreover, Bi2O3 and NiO have synergistic effects by modifying the electronic structure. The newly developed bimetallic NiO/Bi@Bi2O3 hybrid electrode exhibits high volumetric capacitance value of 1166.67 F cm−3, which is attributed to the dual advantages of structure and composition. This work provides a new idea for the design of high-performance transition metal oxide-based electrodes.
通过巧妙利用 Bi 和 Ni 元素在电沉积过程中的不同化学特性，本研究成功设计出了一种具有双重电活性成分（NiO 和 Bi@Bi2O3）和分层多孔结构的新型独立式 NiO/Bi@Bi2O3 混合电极。共电泳后，多孔金属 Bi 作为导电骨架可有效提高电极的导电性。此外，Bi2O3 和 NiO 还能通过改变电子结构产生协同效应。新开发的双金属 NiO/Bi@Bi2O3 混合电极显示出 1166.67 F cm-3 的高体积电容值，这归功于结构和组成的双重优势。这项工作为设计高性能过渡金属氧化物基电极提供了新思路。
{"title":"Facile synthesis of high-performance free-standing hierarchically porous NiO/Bi@Bi2O3 hybrid electrode for supercapacitors","authors":"Xinhao Sun , Hao Wang , Jun Zhou , Zhifeng Wang , Chunling Qin","doi":"10.1016/j.matlet.2024.137609","DOIUrl":"10.1016/j.matlet.2024.137609","url":null,"abstract":"<div><div>By tactfully utilizing the different chemical characteristics of Bi and Ni element in the electrodeposition process, this work successfully designs a novel free-standing NiO/Bi@Bi<sub>2</sub>O<sub>3</sub> hybrid electrode with dual electroactive components (NiO and Bi@Bi<sub>2</sub>O<sub>3</sub>) and hierarchically porous structure. After co-electrodeposition, the porous Bi metal as a conductive skeleton can effectively improve the electrical conductivity of the electrode. Moreover, Bi<sub>2</sub>O<sub>3</sub> and NiO have synergistic effects by modifying the electronic structure. The newly developed bimetallic NiO/Bi@Bi<sub>2</sub>O<sub>3</sub> hybrid electrode exhibits high volumetric capacitance value of 1166.67 F cm<sup>−3</sup>, which is attributed to the dual advantages of structure and composition. This work provides a new idea for the design of high-performance transition metal oxide-based electrodes.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137609"},"PeriodicalIF":2.7,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-24DOI: 10.1016/j.matlet.2024.137521
Chengjiao Che , Jianqiang Bi , Xihua Zhang , Yao Yang , Hongyi Wang , Jiacheng Rong
High-entropy oxides possess high theoretical capacity, stable chemical structure, making them highly promising as battery electrode materials. The limited successful synthesis of high-entropy oxide systems has hindered their further development. This study synthesized a six-component high-entropy spinel oxide (FeCoMgCrLiZn)3O4 for the first time and evaluated its electrochemical performance as an anode for lithium-ion batteries. The data show that this single-phase oxide exhibits a high reversible capacity (stabilizing at 800 mAh/g after 300 cycles at 200 mA/g), good cycling stability (800 stable cycles at 2000 mA/g without significant capacity decay), and excellent rate performance. This study expands the high-entropy oxide family and provides a potential strategy for developing next-generation energy storage materials.
{"title":"Novel High-Entropy oxide Achieves high capacity and stability as an anode for Lithium-Ion batteries","authors":"Chengjiao Che , Jianqiang Bi , Xihua Zhang , Yao Yang , Hongyi Wang , Jiacheng Rong","doi":"10.1016/j.matlet.2024.137521","DOIUrl":"10.1016/j.matlet.2024.137521","url":null,"abstract":"<div><div>High-entropy oxides possess high theoretical capacity, stable chemical structure, making them highly promising as battery electrode materials. The limited successful synthesis of high-entropy oxide systems has hindered their further development. This study synthesized a six-component high-entropy spinel oxide (FeCoMgCrLiZn)<sub>3</sub>O<sub>4</sub> for the first time and evaluated its electrochemical performance as an anode for lithium-ion batteries. The data show that this single-phase oxide exhibits a high reversible capacity (stabilizing at 800 mAh/g after 300 cycles at 200 mA/g), good cycling stability (800 stable cycles at 2000 mA/g without significant capacity decay), and excellent rate performance. This study expands the high-entropy oxide family and provides a potential strategy for developing next-generation energy storage materials.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137521"},"PeriodicalIF":2.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-24DOI: 10.1016/j.matlet.2024.137613
Na Li , Shichang Qiao , Xinyu Gao , Fengzhen Wang , Xin Wen , Zhikang Xia , Yongqiang Wang , Shuai Liu , Jinzhe Jiang , Chao Yuan , Yuanbao Shi
A comprehensive examination of dynamic recrystallization (DRX) mechanisms in wrought superalloy GH4698 has been conducted, leveraging Gleeble thermal simulation experiments and advanced Electron Backscatter Diffraction (EBSD) characterization techniques. Rigorous analysis elucidates four distinct recrystallization processes: Discontinuous Dynamic Recrystallization (DDRX), instigated by strain-induced boundary migration (SIBM); Continuous Dynamic Recrystallization (CDRX), characterized by progressive lattice rotation; Particle Stimulated Nucleation (PSN), driven by the Zener pinning effect of MC-type carbides; and Twin-induced Dynamic Recrystallization (TDRX), facilitated by the interaction between twin boundaries and existing dislocations.
This study investigates the influence of strain rate on the tensile properties, misorientation distribution, and texture evolution of annealed Fe-3.46Al-7.52Mn-0.92Si-0.22C (wt.%) steel. Tensile tests are performed on the annealed sample at room temperature with strain rates of 3.3 × 10-4 (SR-1), 1.65 × 10-3 (SR-2), and 3.3 × 10-3 s−1 (SR-3). At higher strain rates, a higher amount of austenite is retained and higher weighted average kernel average misorientation (KAM) is observed. SR-1 exhibits a superior ductility (40 %) compared to SR-2 and SR-3 (28 and 18 %, respectively) due to the combined effect of a higher amount of austenite (29.2 %) transformed to martensite, a higher fraction of low-angle grain boundaries, and strong Ms-brass {011} < 211 > texture. However, SR-2 and SR-3 show better tensile strength compared to SR-1 due to higher fraction of high-angle grain boundaries and evolution of higher intensity α-fiber RD // <110 > .
{"title":"Influence of strain rate on the tensile properties, misorientation distribution, and texture evolution of automotive-grade TRIP-assisted advanced high-strength steel","authors":"Sudipta Mohapatra , Ashish Kumar , Suman Kumar , Govardhana Poojari , Min-Suk Oh","doi":"10.1016/j.matlet.2024.137612","DOIUrl":"10.1016/j.matlet.2024.137612","url":null,"abstract":"<div><div>This study investigates the influence of strain rate on the tensile properties, misorientation distribution, and texture evolution of annealed Fe-3.46Al-7.52Mn-0.92Si-0.22C (wt.%) steel. Tensile tests are performed on the annealed sample at room temperature with strain rates of 3.3 × 10<sup>-4</sup> (SR-1), 1.65 × 10<sup>-3</sup> (SR-2), and 3.3 × 10<sup>-3</sup> s<sup>−1</sup> (SR-3). At higher strain rates, a higher amount of austenite is retained and higher weighted average kernel average misorientation (KAM) is observed. SR-1 exhibits a superior ductility (40 %) compared to SR-2 and SR-3 (28 and 18 %, respectively) due to the combined effect of a higher amount of austenite (29.2 %) transformed to martensite, a higher fraction of low-angle grain boundaries, and strong Ms-brass {011} < 211 > texture. However, SR-2 and SR-3 show better tensile strength compared to SR-1 due to higher fraction of high-angle grain boundaries and evolution of higher intensity α-fiber RD // <110 > .</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137612"},"PeriodicalIF":2.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-24DOI: 10.1016/j.matlet.2024.137614
Wenkui Xing , Jie Liu , Yuda Su , Chengyi Song
This paper presents a study on the thermal performance and stability of non-gallium liquid metal (BiPbInSnCd alloy with melting point 47 °C) composite. It has been found that incorporating copper particles and copper foam into the non-gallium liquid metal can help to enhance the overall thermal conductivity, and achieved longer lifetime than gallium-based liquid metal composite. We have demonstrated that the average thermal conductivity of non-gallium liquid metal composite with filler weight ratio of 44.4 % can reach as high as 28.9 W·m−1·K−1. The improvement mechanism and the impact of preparation methods on the thermal performance have been also investigated.
{"title":"Enhanced thermal performance and stability of non-gallium liquid metal composites","authors":"Wenkui Xing , Jie Liu , Yuda Su , Chengyi Song","doi":"10.1016/j.matlet.2024.137614","DOIUrl":"10.1016/j.matlet.2024.137614","url":null,"abstract":"<div><div>This paper presents a study on the thermal performance and stability of non-gallium liquid metal (BiPbInSnCd alloy with melting point 47 °C) composite. It has been found that incorporating copper particles and copper foam into the non-gallium liquid metal can help to enhance the overall thermal conductivity, and achieved longer lifetime than gallium-based liquid metal composite. We have demonstrated that the average thermal conductivity of non-gallium liquid metal composite with filler weight ratio of 44.4 % can reach as high as 28.9 W·m<sup>−1</sup>·K<sup>−1</sup>. The improvement mechanism and the impact of preparation methods on the thermal performance have been also investigated.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137614"},"PeriodicalIF":2.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-24DOI: 10.1016/j.matlet.2024.137584
Xinlin Yang , Yun Shen , Bijun Fang , Shuai Zhang , Xiaolong Lu , Jianning Ding
Ba(Cu0.5W0.5)O3 (BCuW)-doped [(Ba0.85Ca0.15)1-xDyx](Zr0.1Ti0.9)O3 (BCZT-xDy, x = 0.001, 0.03) ceramics were prepared by conventional ceramic processing via low-temperature sintering technique. Rather pure perovskite structure and densified morphology with irregular nearly spherical-shape grains are achieved in all ceramics due to liquid-phase sintering. All BCuW-doped BCZT-xDy ceramics present apparent dielectric frequency dispersion and relaxor ferroelectric characteristic due to ion substitution and adding BCuW. The ceramics prepared at optimized sintering temperatures have rather large strain and small strain hysteresis, showing prospect application in piezoelectric high-precision actuators.
{"title":"Low-temperature sintering BCZT-Dy ceramics with low strain hysteresis for actuator application","authors":"Xinlin Yang , Yun Shen , Bijun Fang , Shuai Zhang , Xiaolong Lu , Jianning Ding","doi":"10.1016/j.matlet.2024.137584","DOIUrl":"10.1016/j.matlet.2024.137584","url":null,"abstract":"<div><div>Ba(Cu<sub>0.5</sub>W<sub>0.5</sub>)O<sub>3</sub> (BCuW)-doped [(Ba<sub>0.85</sub>Ca<sub>0.15</sub>)<sub>1-x</sub>Dy<sub>x</sub>](Zr<sub>0.1</sub>Ti<sub>0.9</sub>)O<sub>3</sub> (BCZT-xDy, x = 0.001, 0.03) ceramics were prepared by conventional ceramic processing via low-temperature sintering technique. Rather pure perovskite structure and densified morphology with irregular nearly spherical-shape grains are achieved in all ceramics due to liquid-phase sintering. All BCuW-doped BCZT-xDy ceramics present apparent dielectric frequency dispersion and relaxor ferroelectric characteristic due to ion substitution and adding BCuW. The ceramics prepared at optimized sintering temperatures have rather large strain and small strain hysteresis, showing prospect application in piezoelectric high-precision actuators.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137584"},"PeriodicalIF":2.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High loading flexible electrode material is a key component of flexible batteries. This article prepares a flexible electrode by using electrospinning technology that achieves high conductivity and self-supporting without adhesive and current collector. This structural advantage is attributed to the high compatibility and fibrosis of PAN (polyacrylonitrile) and LFP/CNF, which is transformed in situ by precursor conversion method into a flexible self-supporting composite electrode with continuous carbon fiber/CNF as the conductive phase and LFP(LiFePO4) as the lithium storage phase. These flexible materials achieving a specific capacity of 110.5 mAh/g at 0.1C, 92 mAh/g at 0.5C, and 58 mAh/g at 3C, further demonstrated reversible charge and discharge cycles after mechanical bending. These findings highlight the potential of LFP/CNF electrodes for flexible and high-performance energy storage applications.
{"title":"Research on self-supporting flexible cathode materials with high LFP loading based on PAN in situ inorganic reaction","authors":"Wenjin Song, Tianyan Yang, Xianxian Shi, Wei Xie, Peitao Xiao, Di Lu, Yufang Chen","doi":"10.1016/j.matlet.2024.137615","DOIUrl":"10.1016/j.matlet.2024.137615","url":null,"abstract":"<div><div>High loading flexible electrode material is a key component of flexible batteries. This article prepares a flexible electrode by using electrospinning technology that achieves high conductivity and self-supporting without adhesive and current collector. This structural advantage is attributed to the high compatibility and fibrosis of PAN (polyacrylonitrile) and LFP/CNF, which is transformed in situ by precursor conversion method into a flexible self-supporting composite electrode with continuous carbon fiber/CNF as the conductive phase and LFP(LiFePO<sub>4</sub>) as the lithium storage phase. These flexible materials achieving a specific capacity of 110.5 mAh/g at 0.1C, 92 mAh/g at 0.5C, and 58 mAh/g at 3C, further demonstrated reversible charge and discharge cycles after mechanical bending. These findings highlight the potential of LFP/CNF electrodes for flexible and high-performance energy storage applications.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137615"},"PeriodicalIF":2.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-22DOI: 10.1016/j.matlet.2024.137588
Lu Yang, Deqian Kong, Xiuping Ma, Yi Long, Jibian Ban, Kaiqi Luo, Xianshu Wang
Melastoma dodecandrum Lour. is a plant with a rapid hemostatic effect that is mainly distributed in Guizhou, Guangxi, Guangdong, and other provinces in China. In this study, we prepared a new rapid hemostatic wound dressing using Melastoma dodecandrum Lour. extract (MDLE). Nanofiber membranes (PVA/CS/MDLE) consisting of polyvinyl alcohol (PVA), chitosan (CS), and different doses of MDLE were prepared using an electrospinning method. Then, each group of nanofiber membranes was characterized using SEM, FTIR, and XRD. The diameters of PVA/CS, PVA/CS/2.8 %-MDLE, PVA/CS/5.5 %-MDLE, and PVA/CS/8.2 %-MDLE were 207.2 ± 36.65 nm, 313.3 ± 68.14 nm, 350.0 ± 80.55 nm, and 371.1 ± 82.84 nm, respectively. PVA/CS/2.8 %-MDLE exhibited the greatest mechanical strength, while PVA/CS/5.5 %-MDLE exhibited the greatest elongation at break. PVA/CS/5.5 %-MDLE and PVA/CS/8.2 %-MDLE exhibited significant bacteriostatic effects and inhibited Staphylococcus aureus more effectively than Escherichia coli. The PVA/CS/8.2 %-MDLE group had a significant hemostatic effect (P < 0.001), and all groups exhibited hydrophilicity, swelling ratios, and low toxicity. As the drug concentration increased, the time required for hemostasis decreased. Overall, these findings demonstrated that the PVA/CS/MDLE has great potential as a wound dressing. To our knowledge, this is the first time that a functional nanofiber with rapid hemostasis has been successfully prepared using MDLE.
{"title":"Preparation of a nanofiber membrane loaded with Melastoma dodecandrum Lour. Extract for rapid hemostasis","authors":"Lu Yang, Deqian Kong, Xiuping Ma, Yi Long, Jibian Ban, Kaiqi Luo, Xianshu Wang","doi":"10.1016/j.matlet.2024.137588","DOIUrl":"10.1016/j.matlet.2024.137588","url":null,"abstract":"<div><div><em>Melastoma dodecandrum</em> Lour. is a plant with a rapid hemostatic effect that is mainly distributed in Guizhou, Guangxi, Guangdong, and other provinces in China. In this study, we prepared a new rapid hemostatic wound dressing using <em>Melastoma dodecandrum</em> Lour. extract (MDLE). Nanofiber membranes (PVA/CS/MDLE) consisting of polyvinyl alcohol (PVA), chitosan (CS), and different doses of MDLE were prepared using an electrospinning method.<!--> <!-->Then, each group of nanofiber membranes was characterized using SEM, FTIR, and XRD. The diameters of PVA/CS, PVA/CS/2.8 %-MDLE, PVA/CS/5.5 %-MDLE, and PVA/CS/8.2 %-MDLE were 207.2 ± 36.65 <!--> <!-->nm, 313.3 ± 68.14 nm, 350.0 ± 80.55 nm, and 371.1 ± 82.84 nm, respectively. PVA/CS/2.8 %-MDLE exhibited the greatest mechanical strength, while PVA/CS/5.5 %-MDLE exhibited the greatest elongation at break. PVA/CS/5.5 %-MDLE and PVA/CS/8.2 %-MDLE exhibited significant bacteriostatic effects and inhibited <em>Staphylococcus aureus</em> more effectively than <em>Escherichia coli</em>. The PVA/CS/8.2 %-MDLE group had a significant hemostatic effect (<em>P <</em> 0.001), and all groups exhibited hydrophilicity, swelling ratios, and low toxicity. As the drug concentration increased, the time required for hemostasis decreased. Overall, these findings demonstrated that the PVA/CS/MDLE has great potential as a wound dressing. To our knowledge, this is the first time that a functional nanofiber with rapid hemostasis has been successfully prepared using MDLE.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137588"},"PeriodicalIF":2.7,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-22DOI: 10.1016/j.matlet.2024.137608
Sartaj Wali , Abdur Rahim , Inas A. Ahmed , Katabathini Narasimharao , Muhammad Shafi , Muhammad Khan
This paper investigates the Vander Waals heterostructure of organic rubrene and topological insulator Bi2Se3 with an atomically abrupt interface with exciting applications in electronic and optoelectronic devices. This organic/inorganic heterostructure (OIH) was prepared using a simple two-step physical vapor deposition process; based on this hybrid structure, a self-powered photodetector was then constructed. The Dirac surface state at the heterointerface enhances the splitting and transferring of photo-generated carriers, resulting in improved device characteristics. Under 1064 nm, the prepared photodetectors demonstrated a maximum responsivity (6.37 A/W), a high detectivity (3.42 × 1010 Jones), and ultrafast photoresponse speeds with rise time (1.17 µs) and decay time (1.59 µs), respectively. These promising results suggest that these PDs can be used in various photodetection applications and may lead to developing new devices.
{"title":"Investigation of high-detectivity self-powered photodetectors of Rubrene/Bi2Se3 hybrid Van der Waals heterojunction","authors":"Sartaj Wali , Abdur Rahim , Inas A. Ahmed , Katabathini Narasimharao , Muhammad Shafi , Muhammad Khan","doi":"10.1016/j.matlet.2024.137608","DOIUrl":"10.1016/j.matlet.2024.137608","url":null,"abstract":"<div><div>This paper investigates the Vander Waals heterostructure of organic rubrene and topological insulator Bi<sub>2</sub>Se<sub>3</sub> with an atomically abrupt interface with exciting applications in electronic and optoelectronic devices. This organic/inorganic heterostructure (OIH) was prepared using a simple two-step physical vapor deposition process; based on this hybrid structure, a self-powered photodetector was then constructed. The Dirac surface state at the heterointerface enhances the splitting and transferring of photo-generated carriers, resulting in improved device characteristics. Under 1064 nm, the prepared photodetectors demonstrated a maximum responsivity (6.37 A/W), a high detectivity (3.42 × 10<sup>10</sup> Jones), and ultrafast photoresponse speeds with rise time (1.17 µs) and decay time (1.59 µs), respectively. These promising results suggest that these PDs can be used in various photodetection applications and may lead to developing new devices.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137608"},"PeriodicalIF":2.7,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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