ACS Materials Letters最新文献

Conformational Disorder of Organic Cations Induces Charge Localization in 3D Lead Iodide Perovskitoids toward Sensitive Photodetectors 有机阳离子的构象紊乱诱导三维碘化铅钙钛矿向敏感光电探测器的电荷定位

IF 8.7 1区化学

ACS Materials Letters Pub Date : 2025-08-15 DOI: 10.1021/acsmaterialslett.5c00995

Biqi He, Kuan Kuang, Mingkai Li, Jie Yang, Lei Zhang*, Yunbin He* and Junnian Chen*,

{"title":"Conformational Disorder of Organic Cations Induces Charge Localization in 3D Lead Iodide Perovskitoids toward Sensitive Photodetectors","authors":"Biqi He, Kuan Kuang, Mingkai Li, Jie Yang, Lei Zhang*, Yunbin He* and Junnian Chen*, ","doi":"10.1021/acsmaterialslett.5c00995","DOIUrl":"https://doi.org/10.1021/acsmaterialslett.5c00995","url":null,"abstract":"Three-dimensional (3D) hybrid halide perovskitoids have drawn intense attention in the optoelectronic fields. Therefore, understanding the structural effects on the charge carrier behavior is essential for device optimization. Herein, we establish the correlation between the conformational disorder of cations and the charge carrier property in 3D perovskitoids using computational and experimental investigations. It is shown that the conformational disorder of N,N′-dimethyl-1,3-propane diammonium (M2PDA) cations induces great distortion of the [Pb2I10]6– inorganic framework in 3D (M2PDA)Pb2I6, leading to distinct charge localization. Moreover, the cation configuration disorder suppresses defect formation, thereby reducing lattice microstrain. These modifications effectively elongate the carrier lifetime and diminish carrier scattering to facilitate charge carrier transport. As a result, a photodetector assembled from (M2PDA)Pb2I6 single crystals achieves a satisfying on/off current ratio of 1.42 × 104 and responsivity of 0.55 A W–1, ranking among the highest-performing devices based on 3D perovskitoids. Moreover, the (M2PDA)Pb2I6 single crystals display superior stability in 100% isopropanol.","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 9","pages":"3182–3189"},"PeriodicalIF":8.7,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasensitive Mechanoluminescence Materials by Controlling Molecular Aggregation State via Different Alkyl Groups 通过不同的烷基控制分子聚集状态的超灵敏机械发光材料

IF 8.7 1区化学

ACS Materials Letters Pub Date : 2025-08-12 DOI: 10.1021/acsmaterialslett.5c00589

Richao Shen, Yuqing Sun, Jiawei Lv, Cheng Zeng, Haowen Huang, Sanbao Wang, Shuangyu Dong, Yong Li, Hongting Fan, Ziqiang Lei* and Hengchang Ma*,

{"title":"Ultrasensitive Mechanoluminescence Materials by Controlling Molecular Aggregation State via Different Alkyl Groups","authors":"Richao Shen, Yuqing Sun, Jiawei Lv, Cheng Zeng, Haowen Huang, Sanbao Wang, Shuangyu Dong, Yong Li, Hongting Fan, Ziqiang Lei* and Hengchang Ma*, ","doi":"10.1021/acsmaterialslett.5c00589","DOIUrl":"https://doi.org/10.1021/acsmaterialslett.5c00589","url":null,"abstract":"Organic mechanoluminescence (ML) materials have drawn considerable research attention in the past few years due to their diverse applications in many fields. However, owing to the absence of a rationally designing concept at molecular level, the ML-active organomaterials with ultrasensitivity have been scarcely reported. In this contribution, alkyl groups with different steric hindrances were introduced into triphenylamine (TPA) derivatives’ skeleton, resulting in six compounds as TPA-CHO, MTPA-CHO, ITPA-CHO, sTTPA-CHO, TTPA-CHO, and dTTPA-CHO. Through detailed analysis of their crystal structure and theoretical calculations, it was affirmed that the presence of alkyl groups in TPA derivatives leads to a range of aggregation states, which manage the TPA derivatives with or without ML performance. Contrast to various analogues, TTPA-CHO exhibited bright and the most sensitive ML performance under a mechanical force stimulation of 0.1 N. Based on the ultrasensitive ML characteristic, the applications of information storage and encryption were successfully demonstrated.","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 9","pages":"3167–3173"},"PeriodicalIF":8.7,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shape Memory Collagen Scaffolds Sustain Large-Scale Cyclic Loading 形状记忆胶原蛋白支架承受大规模循环载荷

IF 8.7 1区化学

ACS Materials Letters Pub Date : 2025-08-11 DOI: 10.1021/acsmaterialslett.5c00817

Yan Luo, Hardik Makkar, Yuntao Hu, Keyu Chen, Prashant K. Purohit and Kyle H. Vining*,

{"title":"Shape Memory Collagen Scaffolds Sustain Large-Scale Cyclic Loading","authors":"Yan Luo, Hardik Makkar, Yuntao Hu, Keyu Chen, Prashant K. Purohit and Kyle H. Vining*, ","doi":"10.1021/acsmaterialslett.5c00817","DOIUrl":"https://doi.org/10.1021/acsmaterialslett.5c00817","url":null,"abstract":"Natural biopolymer hydrogels often suffer from relatively low moduli and an inability to maintain structure and mechanics under cyclic loading, limiting their utility in dynamic mechanical environments. Here, a cross-linked collagen cryogel scaffold was fabricated by precompression to densify the network. Following lyophilization, the porous scaffolds sustained >90% axial compressive strain with 200 cycles. Ogden hyperelastic modeling and second harmonic generation (SHG) imaging revealed fiber alignment, densification, and strain-stiffening contributing to resilience under repetitive large-scale loading. After rehydration, cross-linked and densified hydrogels showed network stability and recoverability under cyclic loading, with significantly reduced phase transition strains compared to non-cross-linked controls. The scaffolds supported cell encapsulation and maintained cell viability after 50 cycles of 90% strain. Cyclic loading significantly densified the encapsulated cells in the loading direction, comparable to nonloaded controls. Overall, these results suggest that densified, shape memory collagen scaffolds provide a mechanically robust and biocompatible system for dynamic environments.","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 9","pages":"3150–3158"},"PeriodicalIF":8.7,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsmaterialslett.5c00817","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IF 8.7 1区化学