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Exploration of silk-hyaluronic acid hydrogels crosslinked by the Fenton reaction 探索通过芬顿反应交联的丝-透明质酸水凝胶
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-07 DOI: 10.1016/j.matlet.2024.137682
Yeong Won Park, Dong Yun Lee, Jaewon Choi
{"title":"Exploration of silk-hyaluronic acid hydrogels crosslinked by the Fenton reaction","authors":"Yeong Won Park,&nbsp;Dong Yun Lee,&nbsp;Jaewon Choi","doi":"10.1016/j.matlet.2024.137682","DOIUrl":"10.1016/j.matlet.2024.137682","url":null,"abstract":"<div><div>Herein, HRP-free silk-HA hybrid hydrogels are generated using the Fenton reaction. The findings reveal that a higher HA concentration, at an appropriate crosslinking density, increases the random coil content while decreasing the <em>β</em>-sheet content by reducing the interactions of Fe<sup>3+</sup> ions with silk fibroin. This facilitates the formation of homogeneous hydrogel networks with enhanced optical transparency. The crosslinking strategies presented here offer a basis for the fabrication of hybrid hydrogel scaffolds based on proteins or polymers having phenolic hydroxyl moieties, without the use of HRP-catalyzed reactions, for a broad range of biomedical applications.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137682"},"PeriodicalIF":2.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656533","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}
引用次数: 0
Recognition of light sensing p-n junction for hetero-structure CuInSe2/TiO2 and CuInSe2/HF-TiO2: Study of carrier transport mechanism 识别异质结构 CuInSe2/TiO2 和 CuInSe2/HF-TiO2 的光感应 p-n 结：载流子传输机制研究
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-07 DOI: 10.1016/j.matlet.2024.137662
Animesh Biswas , Ramjan Sk , Asmita Patra , Animesh Layek , Partha Pratim Ray
{"title":"Recognition of light sensing p-n junction for hetero-structure CuInSe2/TiO2 and CuInSe2/HF-TiO2: Study of carrier transport mechanism","authors":"Animesh Biswas ,&nbsp;Ramjan Sk ,&nbsp;Asmita Patra ,&nbsp;Animesh Layek ,&nbsp;Partha Pratim Ray","doi":"10.1016/j.matlet.2024.137662","DOIUrl":"10.1016/j.matlet.2024.137662","url":null,"abstract":"<div><div>Searching of electronic system with functionality is the epitome of the material research and in this context; nanomaterials CuInSe<sub>2</sub> and TiO<sub>2</sub> are the promising stars whose possible applications in electronic devices are just endless. However, the fabrication of junction based device using these two materials is most tantalizing prospect in material science is still at its rudimentary stage. In this letter, we report our recognition of current rectification behavior of CuInSe<sub>2</sub>/TiO<sub>2</sub> heterojunction, identical to the I-V characteristics of p-n junction diode and the impact of white light on it. The HOMO-LUMO band positions of hydrothermally derived CuInSe<sub>2</sub> and TiO<sub>2</sub> nanomaterials indicate that in thermal equilibrium a built-in-potential must arise across the junction. The current-rectification ratio of the configuration Al/CuInSe<sub>2</sub>/TiO<sub>2</sub>/ITO is improved from 560 to 627 at voltage ±2 V on white light illumination and this kind of behavior is certainly offering us an unprecedented way to realize the CuInSe<sub>2</sub>/TiO<sub>2</sub> hetero-junction as photo-sensing p-n diode. The device performance is improved further by replacing TiO<sub>2</sub> with HF treated TiO<sub>2</sub>.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137662"},"PeriodicalIF":2.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656532","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}
引用次数: 0
High-performance flexible piezoresistive 3D pressure sensor based on wrinkled structures and porous microstructures 基于皱褶结构和多孔微结构的高性能柔性压阻式 3D 压力传感器
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-07 DOI: 10.1016/j.matlet.2024.137688
Shuhuan Deng , Qian Zeng , Zhiyuan Xiao, Jiewen Zhang, Guang Yang, XinYing Wu, Jialin Li, Dan Zhang, Jingjie Zhou, Bitao Liu
{"title":"High-performance flexible piezoresistive 3D pressure sensor based on wrinkled structures and porous microstructures","authors":"Shuhuan Deng ,&nbsp;Qian Zeng ,&nbsp;Zhiyuan Xiao,&nbsp;Jiewen Zhang,&nbsp;Guang Yang,&nbsp;XinYing Wu,&nbsp;Jialin Li,&nbsp;Dan Zhang,&nbsp;Jingjie Zhou,&nbsp;Bitao Liu","doi":"10.1016/j.matlet.2024.137688","DOIUrl":"10.1016/j.matlet.2024.137688","url":null,"abstract":"<div><div>To achieve a highly sensitive flexible piezoresistive sensor, an innovative strategy was developed by leveraging wrinkled structures and porous microstructures. Due to these specialized structures, the sensitivity can reach up to 1.58 kPa<sup>−1</sup>. Both macro and micro signal tests were conducted, revealing the ability to detect complex and weak signals found in human physiological responses. Importantly, due to its high sensitivity at low pressure, the sensor can differentiate the pulse rates of individuals, including children and adults. This highlights its potential as a wearable diagnostic device for real-time monitoring of human health under various conditions.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137688"},"PeriodicalIF":2.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656628","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}
引用次数: 0
Effect of exposure conditions on alkali-silica reactions in glass incorporated mortars: Importance of sodium ion 暴露条件对掺玻璃的砂浆中碱-二氧化硅反应的影响：钠离子的重要性
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-07 DOI: 10.1016/j.matlet.2024.137690
Lianfang Sun , Xingji Zhu , Yujin Wang , Guochen Zhao
{"title":"Effect of exposure conditions on alkali-silica reactions in glass incorporated mortars: Importance of sodium ion","authors":"Lianfang Sun ,&nbsp;Xingji Zhu ,&nbsp;Yujin Wang ,&nbsp;Guochen Zhao","doi":"10.1016/j.matlet.2024.137690","DOIUrl":"10.1016/j.matlet.2024.137690","url":null,"abstract":"<div><div>In this study, the alkali-silica reaction (ASR) in glass-incorporated mortar (GIM) under various types of Na<sup>+</sup>-contained exposure conditions were investigated by analyzing ASR expansion, compressive strength, and microstructure. As a key result, in comparison to the exposure condition with the same hydroxide OH<sup>−</sup> concentration, a dramatic increase in ASR-induced expansion can be observed under the mixture condition of 0.5 N-NaOH + 0.5 N-NaCl. SEM/EDX results reveales that Na<sup>+</sup> can improve Na/Si ratio of ASR gel, resulting in a higher swelling capacity. The variation of compressive strength under different exposure conditions was also studied, and then interpreted by analysis of pore structure characteristics. This work highlights the role of Na<sup>+</sup> ion on ASR under alkaline conditions, leading to more precautions in the manufacture of GIM.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137690"},"PeriodicalIF":2.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656537","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}
引用次数: 0
One-step construction of defective Fe-doped MIL-68(In)–NH2 for efficient photocatalytic degradation of bisphenol A 一步构建掺杂缺陷铁的 MIL-68(In)-NH2，高效光催化降解双酚 A
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-07 DOI: 10.1016/j.matlet.2024.137655
Linshuang Tian , Feihu Mu , Minghao Liu , Xujing Guo , Benlin Dai
{"title":"One-step construction of defective Fe-doped MIL-68(In)–NH2 for efficient photocatalytic degradation of bisphenol A","authors":"Linshuang Tian ,&nbsp;Feihu Mu ,&nbsp;Minghao Liu ,&nbsp;Xujing Guo ,&nbsp;Benlin Dai","doi":"10.1016/j.matlet.2024.137655","DOIUrl":"10.1016/j.matlet.2024.137655","url":null,"abstract":"<div><div>Defective Fe-doped MIL-68(In)–NH<sub>2</sub> (Fe-MIL68) was successfully synthesized for photocatalytic bisphenol A (BPA) degradation in one step via a simple hydrothermal method for the first time. The presence of mesoporous structure and oxygen vacancies in Fe-doped Fe-MIL68 was confirmed using modern characterization techniques, which can significantly improve its adsorption performance and electron-hole separation ability, thus enhancing its photocatalytic activity. The results confirmed the photodegradation efficiency of Fe-MIL68 for BPA under visible light could reach 92.3 % in 100 min, which was 2.1 times higher than that of MIL-68(In)–NH<sub>2</sub>.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137655"},"PeriodicalIF":2.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656536","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}
引用次数: 0
Synthesis of Sn-catalyzed Ge nanowires and Ge/Si heterostructures via a gradient method 通过梯度法合成锡催化的 Ge 纳米线和 Ge/Si 异质结构
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-07 DOI: 10.1016/j.matlet.2024.137674
Xianjun Zhu , Ya Shen , Ileana Florea , Pere Roca i Cabarrocas , Wanghua Chen
{"title":"Synthesis of Sn-catalyzed Ge nanowires and Ge/Si heterostructures via a gradient method","authors":"Xianjun Zhu ,&nbsp;Ya Shen ,&nbsp;Ileana Florea ,&nbsp;Pere Roca i Cabarrocas ,&nbsp;Wanghua Chen","doi":"10.1016/j.matlet.2024.137674","DOIUrl":"10.1016/j.matlet.2024.137674","url":null,"abstract":"<div><div>In this study, we investigate the growth of Ge nanowires (NWs) using a gas supply gradient method during plasma-enhanced chemical vapor deposition (PECVD), focusing on the effects of GeH<sub>4</sub> partial pressure and total chamber pressure on NWs morphology. By adjusting either the GeH<sub>4</sub> flow rate or the total pressure, we explored a gradient method to manipulate the growth process. Scanning electron microscopy (SEM) images revealed that, even with constant GeH<sub>4</sub> partial pressure, variations in total pressure significantly influenced NWs diameter and structure. Furthermore, elemental mapping and compositional analysis demonstrated the presence of a Ge/Si heterostructure with a Sn catalyst at the apex and an amorphous Si layer encapsulating the NW surface.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137674"},"PeriodicalIF":2.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656603","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}
引用次数: 0
Mechanical enhancement of porous scaffolds through integration of auxetic and conventional structures 通过整合辅助结构和传统结构增强多孔支架的机械性能
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-06 DOI: 10.1016/j.matlet.2024.137675
Juhyun Kang , Masoud Shirzad , Ji Min Seok , Won-Kyo Jung , Seung Yun Nam
{"title":"Mechanical enhancement of porous scaffolds through integration of auxetic and conventional structures","authors":"Juhyun Kang ,&nbsp;Masoud Shirzad ,&nbsp;Ji Min Seok ,&nbsp;Won-Kyo Jung ,&nbsp;Seung Yun Nam","doi":"10.1016/j.matlet.2024.137675","DOIUrl":"10.1016/j.matlet.2024.137675","url":null,"abstract":"<div><div>Additive manufacturing has revolutionized the fabrication of various porous structures using diverse biomaterials for preclinical and clinical applications. However, hybrid structures combining conventional and auxetic structures have been seldom explored, despite their immense potential for biomedical applications. This study aims to design various hybrid auxetic and conventional structures and demonstrate their mechanical properties using porous composite polycaprolactone/hydroxyapatite (PCL/HA) biomaterials. Our findings reveal that newly suggested structures can enhance Young’s modulus, yield stress, and energy absorption by up to 98.64%, 99.27%, and 98.61%, respectively, compared to the conventional structures. Moreover, all fabricated scaffolds exhibit porosity exceeding 90%, ensuring their suitability for tissue engineering applications.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137675"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656526","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}
引用次数: 0
Microfluidic foaming of polydimethylsiloxane (PDMS) 聚二甲基硅氧烷（PDMS）的微流体发泡技术
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-06 DOI: 10.1016/j.matlet.2024.137653
Wenya Liao , Pengfei Wang , Zhongbin Xu , Xing Huang
{"title":"Microfluidic foaming of polydimethylsiloxane (PDMS)","authors":"Wenya Liao ,&nbsp;Pengfei Wang ,&nbsp;Zhongbin Xu ,&nbsp;Xing Huang","doi":"10.1016/j.matlet.2024.137653","DOIUrl":"10.1016/j.matlet.2024.137653","url":null,"abstract":"<div><div>Porous polydimethylsiloxane (PDMS) materials are widely used in areas including sensors, environment and tissue engineering. We presented a microfluidic foaming method for fabricating porous PDMS, offering precise control over pore size and distribution. By adjusting gas pressure during the foaming process, PDMS structures with both uniform and gradient porosity were created, enabling fine-tuning of mechanical properties. The microfluidic approach not only simplifies the production process but also allows for the rational design of porous PDMS with customized mechanical characteristics.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137653"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656516","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}
引用次数: 0
Emergent updates and future directions on white light emitting diodes based on luminous lead-free halide perovskites 基于发光无铅卤化物过氧化物的白光发光二极管的最新进展和未来方向
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-06 DOI: 10.1016/j.matlet.2024.137671
Prashant Kumar , Manish Kumar , Dharm Veer Singh , Samiksha Dabas , D.K. Dwivedi
{"title":"Emergent updates and future directions on white light emitting diodes based on luminous lead-free halide perovskites","authors":"Prashant Kumar ,&nbsp;Manish Kumar ,&nbsp;Dharm Veer Singh ,&nbsp;Samiksha Dabas ,&nbsp;D.K. Dwivedi","doi":"10.1016/j.matlet.2024.137671","DOIUrl":"10.1016/j.matlet.2024.137671","url":null,"abstract":"<div><div>Lead halide perovskites possess exceptional optical and electrical properties, yet their inherent toxicity and instability present significant challenges for practical application in white light-emitting diodes (WLEDs) for displays and lighting. Alhough, techniques such as reduced dimensionality, transition metal doping, and protective encapsulation have shown some success in enhancing stability. These advancements remain limited and do not fully meet the requirements for real-world WLED devices. This featured letter delves into the emerging advancements in lead-free halide perovskite WLEDs includes color-conversion WLEDs, and single-emissive-layer WLEDs. Despite significant advancements, issues with stability, efficiency, and scalable fabrication still exist. Future approaches centre on methods to enhance these features, opening the door for lead-free perovskite WLEDs to become commercially viable and bringing in a new age of environmentally friendly lighting options. Additionally, this featured letter provides a comprehensive review of the current advancements and future possibilities in WLEDs based on lead-free halide perovskites materials. This letter serves as an invaluable resource for researchers, scientists, and engineers dedicated to advancing this field.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137671"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656522","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}
引用次数: 0
The shift in chemical potential of electrons upon intercalation of ZrSe2 by copper 铜插层 ZrSe2 时电子化学势的变化
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-06 DOI: 10.1016/j.matlet.2024.137673
A.S. Shkvarin, E.A. Suslov, M.S. Postnikov, A.N. Titov
{"title":"The shift in chemical potential of electrons upon intercalation of ZrSe2 by copper","authors":"A.S. Shkvarin,&nbsp;E.A. Suslov,&nbsp;M.S. Postnikov,&nbsp;A.N. Titov","doi":"10.1016/j.matlet.2024.137673","DOIUrl":"10.1016/j.matlet.2024.137673","url":null,"abstract":"<div><div>The effective valence of copper in the region of its concentration up to x = 0.25 in Cu<sub>x</sub>ZrSe<sub>2</sub> has been determined based on an analysis of binding energies of the Zr3d and Se3d core levels and the electromotive forces from an electrochemical experiment for Cu<sub>x</sub>ZrSe<sub>2</sub>, as a function of Cu concentration x. It has been shown that the domination of covalent bonding between copper and the ZrSe<sub>2</sub> host lattice within this concentration range results in a notable reduction in the effective valence of copper in comparison to its nominal value.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137673"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656527","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}
引用次数: 0
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