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Imaging Photocarrier Dynamics in Schottky Junction Interface by Scanning Ultrafast Electron Microscopy. 扫描超快电子显微镜成像肖特基结界面光载流子动力学。
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30 Epub Date: 2025-06-12 DOI: 10.1021/acs.nanolett.5c02252
Xiang Chen, Yaqing Zhang, Yaocheng Yu, Yue Huang, Jiangteng Guo, Wei Ai, Moxi Qiu, Yunyao Jia, Wei Tang, Fang Liu, Min Feng, Cuntao Gao, Shibin Deng, Jinxiong Wu, Xuewen Fu
{"title":"Imaging Photocarrier Dynamics in Schottky Junction Interface by Scanning Ultrafast Electron Microscopy.","authors":"Xiang Chen, Yaqing Zhang, Yaocheng Yu, Yue Huang, Jiangteng Guo, Wei Ai, Moxi Qiu, Yunyao Jia, Wei Tang, Fang Liu, Min Feng, Cuntao Gao, Shibin Deng, Jinxiong Wu, Xuewen Fu","doi":"10.1021/acs.nanolett.5c02252","DOIUrl":"10.1021/acs.nanolett.5c02252","url":null,"abstract":"<p><p>Carrier dynamics at Schottky junction interfaces are crucial for optimizing photoconversion efficiency in photovoltaic, optoelectronic, and photoelectrochemical devices. However, accurately detecting the embedded interfaces remains challenging, particularly with regard to the dynamics of carriers within the two-dimensional (2D) interfacial plane. Here, we use scanning ultrafast electron microscopy (SUEM) to directly image spatiotemporal photocarrier dynamics at the n-type gallium arsenide (n-GaAs)/aluminum (Al) Schottky interface with a nanoscale thickness. The recorded SUEM movies demonstrate that the electrons and holes are separated by the built-in electric field with holes subsequently trapped by interface states. These trapped holes exhibit a quasi-2D subdiffusion behavior along the junction interface via hopping through the interface states. Numerical simulations based on a developed subdiffusion dynamical model well repeat the observations. Our findings provide new insights into the carrier transport dynamics in Schottky junctions and unravel the pivotal role of the interface states.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":"11586-11593"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Designing 3D Nanoporous Cu/Cu2O (Bi) with Bimodal Porosity as a High-Rate and Capacity Zinc Anode Host. 设计具有双峰孔隙度的三维纳米多孔Cu/Cu2O （Bi）作为高速率、高容量锌阳极主体。
IF 10.8 1区 材料科学
Nano Letters Pub Date : 2025-07-30 DOI: 10.1021/acs.nanolett.5c02688
Yanyi Zhang,Jiayin Chen,Boxuan Cao,Yinghe Zhang,Guoqiang Xie,Xingjun Liu,Kolan Madhav Reddy,Hua-Jun Qiu
{"title":"Designing 3D Nanoporous Cu/Cu2O (Bi) with Bimodal Porosity as a High-Rate and Capacity Zinc Anode Host.","authors":"Yanyi Zhang,Jiayin Chen,Boxuan Cao,Yinghe Zhang,Guoqiang Xie,Xingjun Liu,Kolan Madhav Reddy,Hua-Jun Qiu","doi":"10.1021/acs.nanolett.5c02688","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02688","url":null,"abstract":"We report a bimodal nanoporous Cu/Cu2O doped with bismuth (np-Cu/Cu2O (Bi)) by dealloying an Al-Cu-Bi-based two-phase precursor alloy. Different from the typically used unimodal porous Cu, the bimodal structure provides big pores (hundreds of nanometers) for enough Zn deposition (high capacity) and small pores (10 nm) with a high specific surface area for high rates. Moreover, the formation of the Cu2O surface with Bi doping significantly reduces the Zn deposition overpotential. The np-Cu/Cu2O (Bi)-based half cells and symmetric cells exhibit much lower Zn deposition overpotential (88.7 mV) and excellent cycling stability (over 260 h), respectively, even at a large current density of 50 mA cm-2, obviously outperforming the pure Zn-based cells and most reported results. The dendrite issue and side reaction are also largely limited by the bimodal nanoporous structure design and surface modification. This work provides inspiration for developing an advanced Zn anode through porosity design and surface chemistry modulation.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"215 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144737439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30
Zachary R. Mansley, Marie F. Millares, Olivia Kazanjian, Jessica Luo, Esther S. Takeuchi, Amy C. Marschilok, Jianming Bai, Shan Yan, Kenneth J. Takeuchi* and Yimei Zhu*, 
{"title":"","authors":"Zachary R. Mansley,&nbsp;Marie F. Millares,&nbsp;Olivia Kazanjian,&nbsp;Jessica Luo,&nbsp;Esther S. Takeuchi,&nbsp;Amy C. Marschilok,&nbsp;Jianming Bai,&nbsp;Shan Yan,&nbsp;Kenneth J. Takeuchi* and Yimei Zhu*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 30","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.5c02373","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","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 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30
Huaxuan Song, Jinhong Liu, Yue Wu, Yanqing Ge, Nan Ma, Tengfeng Wang, Chunhui Lu*, Yixuan Zhou* and Xinlong Xu*, 
{"title":"","authors":"Huaxuan Song,&nbsp;Jinhong Liu,&nbsp;Yue Wu,&nbsp;Yanqing Ge,&nbsp;Nan Ma,&nbsp;Tengfeng Wang,&nbsp;Chunhui Lu*,&nbsp;Yixuan Zhou* and Xinlong Xu*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 30","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.5c02760","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","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 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30
Chia-Yun Sung, Yu-Hao Tu, Le Thi Quynh, Ching-Min Su, Hung-Yi Wu, Lu-Hsing Chen, Kuo-Ping Chen, Wan-Zhen Hsieh, Ching-Yu Chiang, Wen-Hui Sophia Cheng* and Ying-Hao Chu*, 
{"title":"","authors":"Chia-Yun Sung,&nbsp;Yu-Hao Tu,&nbsp;Le Thi Quynh,&nbsp;Ching-Min Su,&nbsp;Hung-Yi Wu,&nbsp;Lu-Hsing Chen,&nbsp;Kuo-Ping Chen,&nbsp;Wan-Zhen Hsieh,&nbsp;Ching-Yu Chiang,&nbsp;Wen-Hui Sophia Cheng* and Ying-Hao Chu*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 30","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.5c02616","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","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 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30
Zhongxiang Wang, Lu Jin, Haoyang Ni, Hwangsun Kim, Yushun Zeng, Qifa Zhou, Miaofang Chi, Jin Nam* and Yadong Yin*, 
{"title":"","authors":"Zhongxiang Wang,&nbsp;Lu Jin,&nbsp;Haoyang Ni,&nbsp;Hwangsun Kim,&nbsp;Yushun Zeng,&nbsp;Qifa Zhou,&nbsp;Miaofang Chi,&nbsp;Jin Nam* and Yadong Yin*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 30","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.5c03084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","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 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30
Zekai Xiao, Boya Yu, Shuaiqi Shao, Mingda Yang, Houjin Jing, Shuhua Peng, Ziyang Cao*, Xianzhu Yang* and Jun Wang*, 
{"title":"","authors":"Zekai Xiao,&nbsp;Boya Yu,&nbsp;Shuaiqi Shao,&nbsp;Mingda Yang,&nbsp;Houjin Jing,&nbsp;Shuhua Peng,&nbsp;Ziyang Cao*,&nbsp;Xianzhu Yang* and Jun Wang*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 30","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.5c02733","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","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 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30
Baoyuan Xu, Fanxing Meng, Shaoqian Zhu, You Li, Lei Ji, Chen Qiao*, Chunhuan Zhang* and Jiatao Zhang*, 
{"title":"","authors":"Baoyuan Xu,&nbsp;Fanxing Meng,&nbsp;Shaoqian Zhu,&nbsp;You Li,&nbsp;Lei Ji,&nbsp;Chen Qiao*,&nbsp;Chunhuan Zhang* and Jiatao Zhang*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 30","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.5c02379","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ferroelectric Tailorable WS2/Graphene Phototransistors. 铁电可定制WS2/石墨烯光电晶体管。
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30 Epub Date: 2025-07-17 DOI: 10.1021/acs.nanolett.5c02241
Junyi She, Xin Liu, Haoliang Liu, Hao Yu, Jianyu Wang, Zhiheng Shen, Bing Xiao, Yonghong Cheng, Zongyou Yin, Guodong Meng
{"title":"Ferroelectric Tailorable WS<sub>2</sub>/Graphene Phototransistors.","authors":"Junyi She, Xin Liu, Haoliang Liu, Hao Yu, Jianyu Wang, Zhiheng Shen, Bing Xiao, Yonghong Cheng, Zongyou Yin, Guodong Meng","doi":"10.1021/acs.nanolett.5c02241","DOIUrl":"10.1021/acs.nanolett.5c02241","url":null,"abstract":"<p><p>Two-dimensional (2D) phototransistors face severe challenges in achieving high photoresponsivity and low power consumption, primarily due to their low absorption cross-section and short carrier lifetime, especially as the device feature size continues to shrink. To address these challenges, we propose a ferroelectric-enhanced doping effect to conduct band engineering and charge redistribution, which effectively mitigates the Fermi level pinning effect and enables selective ambipolar behaviors, resulting in ideal electrical contact and efficient carrier transport. Furthermore, the polarization-induced floating gate introduces additional gain mechanisms through defect engineering and a tunneling effect, which significantly improves photomultiplication and carrier acceleration. Consequently, the as-fabricated phototransistor based on a WS<sub>2</sub>/graphene heterojunction and Al:HfO<sub>2</sub> ferroelectric layer exhibits outstanding performances, including a high detectivity of 2.38 × 10<sup>13</sup> Jones and an impressive photogain of 3.28 × 10<sup>7</sup>, without requiring an external gate bias. These exceptional multifaceted characteristics highlight the potential of the proposed ferroelectric-tailored device for applications in integrated circuits, optoelectronic logic operations, and image sensors.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":"11578-11585"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144657816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Bioinspired Polymeric Nanomedicines with Tumor Extracellular Matrix Anchoring Capability for Prolonged Tumor Retention and Drug Delivery. 具有肿瘤细胞外基质锚定能力的生物启发聚合物纳米药物，用于延长肿瘤保留和药物输送。
IF 9.1 1区 材料科学
Nano Letters Pub Date : 2025-07-30 Epub Date: 2025-07-21 DOI: 10.1021/acs.nanolett.5c02733
Zekai Xiao, Boya Yu, Shuaiqi Shao, Mingda Yang, Houjin Jing, Shuhua Peng, Ziyang Cao, Xianzhu Yang, Jun Wang
{"title":"Bioinspired Polymeric Nanomedicines with Tumor Extracellular Matrix Anchoring Capability for Prolonged Tumor Retention and Drug Delivery.","authors":"Zekai Xiao, Boya Yu, Shuaiqi Shao, Mingda Yang, Houjin Jing, Shuhua Peng, Ziyang Cao, Xianzhu Yang, Jun Wang","doi":"10.1021/acs.nanolett.5c02733","DOIUrl":"10.1021/acs.nanolett.5c02733","url":null,"abstract":"<p><p>The unsatisfactory delivery efficacy of nanocarriers adversely restricts the therapeutic activity of encapsulated cargoes, and the current strategies, such as ligand decoration, is limited by the tumor heterogeneity of patients. Inspired by the excellent adhesion behavior of mussels, we developed a nanocarrier (Ac-NP) of catechol-decorated hyperbranched polyglycerol (HPG) to enable strong anchoring to ECM components (collagen I, laminin, proteoglycans), markedly improving the delivery efficacy of various anticancer agents. Meanwhile, to minimize its nonspecific ECM anchoring following intravenous injection, the nanocarrier was masked by 4-carboxyphenylboronic acid (PBA), and the resultant TAc-NPs exhibited specific tumor extracellular ECM-anchoring capability. TAc-NPs showed a 2.3-fold increase in tumor accumulation, with over 70% retained in the ECM. This ECM-anchored system significantly enhanced the therapeutic efficacy of extracellular (BB94), intracellular (doxorubicin), and membrane-targeted (BMS-1) drugs for efficient chemoimmunotherapy. Our strategy offers a broadly applicable nanoplatform for delivery of various types of anticancer agents without the limitation of tumor heterogeneity.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":"11663-11672"},"PeriodicalIF":9.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144681681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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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