Nano Letters最新文献_第5页

Twist Angle-Dependent Exciton Mobility in WS2 Bilayers

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-03 DOI: 10.1021/acs.nanolett.5c00027

Yangguang Zhong, Shuai Yue, Jieyuan Liang, Long Yuan, Yuexing Xia, Yubo Tian, Yuanyuan Zheng, Yuyang Zhang, Wenna Du, Dong Li, Shula Chen, Anlian Pan, Xinfeng Liu

{"title":"Twist Angle-Dependent Exciton Mobility in WS2 Bilayers","authors":"Yangguang Zhong, Shuai Yue, Jieyuan Liang, Long Yuan, Yuexing Xia, Yubo Tian, Yuanyuan Zheng, Yuyang Zhang, Wenna Du, Dong Li, Shula Chen, Anlian Pan, Xinfeng Liu","doi":"10.1021/acs.nanolett.5c00027","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00027","url":null,"abstract":"Bilayer WS2 shows exceptional promise for excitonic devices due to its defect tolerance, high carrier density, and angle-tunable electronic properties. However, fundamental understanding of twist angle-dependent exciton transport remains limited due to challenges in sample preparation and interplays between interlayer coupling and moiré potential. Using transient reflection microscopy (TRM), we systematically studied exciton mobility in chemical vapor deposition-grown (CVD-grown) bilayer WS2 with different twist angles. At 0°, strong interlayer coupling without moiré potential effects yielded the highest exciton mobility (87.3 cm2/V s)- 10-fold greater than monolayer WS2-with a 1.06 μm diffusion length, while the 25° sample showed reduced mobility (44.5 cm2/(V s)) and shorter diffusion length (0.88 μm) due to weakened coupling and moiré potential effects, and the 60° case exhibited intermediate characteristics. This work demonstrates that interlayer coupling and moiré potential modulation critically determine exciton transport dynamics in layered two-dimensional semiconductors, providing essential guidelines for device engineering.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"38 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538589","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

Selective Surface Passivation for Ultrathin and Continuous Metallic Films via Atomic Layer Deposition

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-03 DOI: 10.1021/acs.nanolett.5c00590

Han Kim, Taeseok Kim, Minseok Kim, Jihoon Jeon, Gwang Min Park, Sung-Chul Kim, Sung Ok Won, Ryosuke Harada, Sangtae Kim, Seong Keun Kim

{"title":"Selective Surface Passivation for Ultrathin and Continuous Metallic Films via Atomic Layer Deposition","authors":"Han Kim, Taeseok Kim, Minseok Kim, Jihoon Jeon, Gwang Min Park, Sung-Chul Kim, Sung Ok Won, Ryosuke Harada, Sangtae Kim, Seong Keun Kim","doi":"10.1021/acs.nanolett.5c00590","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00590","url":null,"abstract":"The high surface energy of metals often drives the formation of isolated ultrathin islands of metal nuclei during film fabrication, which remains a significant challenge in achieving continuous, smooth metallic films. This study introduces an inhibitor-modified atomic layer deposition (ALD) strategy for producing ultrathin continuous Ir and Pt films on dielectric substrates. Aniline, which was used as the inhibitor, was exclusively adsorbed onto the metallic surface. The selective passivation of metal nuclei with aniline suppresses the lateral growth of existing nuclei while promoting the formation of new nuclei, enabling the formation of continuous films with thicknesses below 1 and 2.3 nm for Ir and Pt, respectively. Compared with conventional ALD, this approach significantly improved the surface smoothness and reduced the resistivity. Furthermore, this approach is particularly effective for precursors with substantial nucleation delays. This strategy offers an effective solution for fabricating ultrathin and smooth metallic films for emerging electronic devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"12 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143539250","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

Coumarin Excimer Nanotube for Long-Time Lysosome Tracking 用于长时间跟踪溶酶体的香豆素准分子纳米管

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-03 DOI: 10.1021/acs.nanolett.5c00041

Yang Yang, Xiaoyang Liu, Ying Xu, Fan Xing, Zihan Yuan, Yuxuan Chen, Xiaofeng Wu, Cailian Wang, Gaolin Liang

引用次数: 0

Defect-Modulated MOF Nanochannels for the Quasi-Solid-State Electrolyte of a Dendrite-Free Lithium Metal Battery

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-02 DOI: 10.1021/acs.nanolett.4c05596

Jialong Jiang, Runhao Zhang, Jiachen Guo, Shiqi Zhang, Xiangtai Min, Ziyang Liu, Ning Liu, Dapeng Cao, Jun Xu, Peng Cheng, Wei Shi

{"title":"Defect-Modulated MOF Nanochannels for the Quasi-Solid-State Electrolyte of a Dendrite-Free Lithium Metal Battery","authors":"Jialong Jiang, Runhao Zhang, Jiachen Guo, Shiqi Zhang, Xiangtai Min, Ziyang Liu, Ning Liu, Dapeng Cao, Jun Xu, Peng Cheng, Wei Shi","doi":"10.1021/acs.nanolett.4c05596","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05596","url":null,"abstract":"Efficient and selective Li+ transport within the nanochannel is essential for high-performance solid-state electrolytes (SSEs) in lithium metal batteries. Introducing Li+ hopping sites into SSEs shows great potential for promoting Li+ transport; however, it typically reduces the Li+ transport nanochannel size, consequently increasing the energy barrier for Li+ transport. Herein, we present a molecular defect strategy for MOFs to introduce Li+ hopping sites and increase the nanochannel size simultaneously as quasi-solid-state electrolytes (QSSEs). Compared with the defect-free Li@UiO-66-based QSSE, the optimized Li@UiO-66-D2-based QSSE exhibits a remarkable 343% enhancement in Li+ conductivity and improved Li+ selectivity. Furthermore, the 9 cm × 6 cm Li|Li@UiO-66-D2|LFP pouch cell exhibits excellent cycling performance with high capacity retention. An in-depth mechanism study has unveiled the significant impact of both hopping sites and nanochannel size on Li+ transport, emphasizing the importance of a molecular defect strategy in enhancing the overall Li+ transport performance of MOF-based QSSEs.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"1 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143532531","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

Construction of Carbon Dot-Based Color-Tunable Circularly Polarized Long Afterglow via in Situ Phosphorescence Resonance Energy Transfer

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-28 DOI: 10.1021/acs.nanolett.5c00359

Yijie Wang, Shengju Zhou, Yi Zhao, Haibin Xiao, Ling-Bao Xing, Xiaofeng Sun, Jin Zhou, Siyu Lu

引用次数: 0

Halide as Catholyte in Composite Cathode to Enhance Cycling Stability of All-Solid-State Lithium–Sulfur Batteries 卤化物作为复合阴极中的电解质，提高全固态锂硫电池的循环稳定性

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-28 DOI: 10.1021/acs.nanolett.4c05892

Xiaorong Fang, Yujun Fu, Shiqing Sun, Rongcheng Zhang, Pengqian Guo, Kai Sun, Dequan Liu, Kai Wang, Deyan He

{"title":"Halide as Catholyte in Composite Cathode to Enhance Cycling Stability of All-Solid-State Lithium–Sulfur Batteries","authors":"Xiaorong Fang, Yujun Fu, Shiqing Sun, Rongcheng Zhang, Pengqian Guo, Kai Sun, Dequan Liu, Kai Wang, Deyan He","doi":"10.1021/acs.nanolett.4c05892","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05892","url":null,"abstract":"All-solid-state lithium–sulfur batteries (ASSLSBs) using inorganic solid-state electrolytes can effectively alleviate the polysulfide shuttle effect in liquid electrolytes and improve the energy density. However, the electrochemical window of sulfide-based catholytes in composite cathodes is relatively narrow, which makes the evaluation of electrochemical performance of sulfur cathodes in ASSLSBs complicated. The decomposition of the sulfide catholytes increases the interfacial resistance, thus reducing the battery cycle life. To overcome these challenges, Li3YCl5I has been developed with a wide window of electrochemical stability for a catholyte suitable for a composite cathode. Its ionic conductivity is as high as 1.67 × 10–3 S cm–1, which is conducive to the rapid transport of lithium ions. The ASSLSB based on the Li3YCl5I catholyte exhibits a discharge specific capacity of 1084.05 mAh g–1 at 45 °C. Additionally, it maintains 81.5% capacity after 100 cycles, significantly exceeding the retention rate of 54.5% for a battery using Li6PS5Cl.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"28 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526299","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

Thermally Stable Ruthenium Contact for Robust p-Type Tellurium Transistors

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-28 DOI: 10.1021/acs.nanolett.4c06553

I K M Reaz Rahman, Taehoon Kim, Inha Kim, Naoki Higashitarumizu, Shu Wang, Shifan Wang, Hyong Min Kim, James Bullock, Virginia Altoe, Joel W. Ager, III, Daryl C. Chrzan, Ali Javey

{"title":"Thermally Stable Ruthenium Contact for Robust p-Type Tellurium Transistors","authors":"I K M Reaz Rahman, Taehoon Kim, Inha Kim, Naoki Higashitarumizu, Shu Wang, Shifan Wang, Hyong Min Kim, James Bullock, Virginia Altoe, Joel W. Ager, III, Daryl C. Chrzan, Ali Javey","doi":"10.1021/acs.nanolett.4c06553","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06553","url":null,"abstract":"Tellurium (Te) is attractive for p-channel transistors due to its high hole mobility. Despite having a low thermal budget suitable for back-end-of-line (BEOL) monolithic integration, the practical realization of Te transistors is hindered by its thermal stability. In this work, we investigate thermal stability for Te thin films grown via scalable thermal evaporation. Our findings identify ruthenium as a more thermally stable contact for p-type Te transistors, capable of withstanding temperatures up to 250 °C. Ruthenium exhibits significantly lower diffusivity in Te compared to other contact metals commonly used such as nickel and palladium. Using the transfer-length method, we measured a contact resistance of 1.25 kΩ·μm at the ruthenium–tellurium interface. Additionally, the incorporation of high-κ ZrO2 encapsulation not only suppresses the sublimation of the Te channel at elevated temperatures but also serves as the gate dielectric in top-gate devices operating at 1 V, achieving an on/off current ratio of 105.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"28 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518339","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

Alleviating Mn Ion Dissolution in LiMn2O4 by Activation of TiO2 Lewis Acid Sites in Electrospun PVA/TiO2 Quasi-Solid Polymer Electrolyte 通过激活电纺 PVA/TiO2 准固体聚合物电解质中的 TiO2 路易斯酸位点缓解锰离子在 LiMn2O4 中的溶解

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-28 DOI: 10.1021/acs.nanolett.4c04611

Jenny Johnson, Sajan Raj Sasirajan Littleflower, Kumaran Vediappan, Helen Annal Therese

{"title":"Alleviating Mn Ion Dissolution in LiMn2O4 by Activation of TiO2 Lewis Acid Sites in Electrospun PVA/TiO2 Quasi-Solid Polymer Electrolyte","authors":"Jenny Johnson, Sajan Raj Sasirajan Littleflower, Kumaran Vediappan, Helen Annal Therese","doi":"10.1021/acs.nanolett.4c04611","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c04611","url":null,"abstract":"The primary concern of interest in high-voltage cathodes such as spinel LiMn2O4 is transition metal dissolution. Though several techniques and structural modifications are continuously under examination, a crucial factor that could make a significant impact is the careful evaluation of electrolyte properties. In this regard, a PVA/TiO2 (PT) quasi-solid polymer electrolyte prepared using an electrospinning technique is employed to suppress HF scavengers, a main cause of manganese dissolution. Good electrochemical stability of 5.05 V, ionic conductivity of 0.26 × 10–5 S cm–1, stable plating–stripping, and tLi+ of 0.82 are evidence for good electrolyte performance. Lewis acid sites of TiO2 firmly hold the PF6– anions, and strong hydrogen bonding of carbonate solvents disrupts the cycle of electrolyte decomposition reactions. The capacity retention of 73% after 500 cycles at a 2C rate and post-mortem analysis of the LMO cathode provide evidence for the successful suppression of manganese dissolution using a PT electrolyte.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"191 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526298","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

Near-Infrared Nanothermometer Reveals Temperature Discrepancy between Organs and Body Surface for Heatstroke Prevention

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-28 DOI: 10.1021/acs.nanolett.4c06532

Meilin Liu, Yaru Sun, Yi Zhang, Yufu Liu, Zhengbing Liang, Junhao Liu, Hongbao Xin, Xiancheng Zeng, Qingsong Mei

{"title":"Near-Infrared Nanothermometer Reveals Temperature Discrepancy between Organs and Body Surface for Heatstroke Prevention","authors":"Meilin Liu, Yaru Sun, Yi Zhang, Yufu Liu, Zhengbing Liang, Junhao Liu, Hongbao Xin, Xiancheng Zeng, Qingsong Mei","doi":"10.1021/acs.nanolett.4c06532","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06532","url":null,"abstract":"Organ temperatures often vary significantly from body surface temperatures during heatstroke, leading to acute organ failure, although body temperature is continuously controlled. However, the exact temperature discrepancy between them remains unclear due to a lack of noninvasive techniques for real-time monitoring of organ temperature fluctuations. Herein, we developed a near-infrared emissive nanothermometer by codoping Nd3+ and Yb3+ to produce two distinct emissions at 980 and 1330 nm under 808 nm excitation. These emissions demonstrated differential responses to temperature variations, enabling the construction of a ratiometric nanoprobe for accurate temperature detection. Notably, the nanoprobe rapidly accumulated in mouse liver after intravenous injection, revealing that liver showed consistently higher temperature than rectum by approximately 1.5 °C. Moreover, liver injury was found to begin at a rectal temperature of 42 °C, rather than the 43 °C conventionally used in heatstroke models. These findings introduce a robust nanothermometer for accurately understanding the pathological progression of heat-related illnesses.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"52 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518338","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

High-Throughput Formation of 3D van der Waals Auto-Kirigami

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-28 DOI: 10.1021/acs.nanolett.4c06637

Luc N. Capaldi, Li Yuan, Cangyu Qu, Daniel A. Sánchez, Robert W. Carpick, Ottman A. Tertuliano

引用次数: 0