Nano Letters最新文献_第10页

Polarized Polymer Rectangles Featuring Long-Range Ordered π-Conjugation for Anisotropic Responses to Light and Tensile Vectors

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.5c0142210.1021/acs.nanolett.5c01422

Tae Kyung Won, Sang Yup Lee, Seung Hyuk Back, Chunzhi Cui* and Dong June Ahn*,

{"title":"Polarized Polymer Rectangles Featuring Long-Range Ordered π-Conjugation for Anisotropic Responses to Light and Tensile Vectors","authors":"Tae Kyung Won, Sang Yup Lee, Seung Hyuk Back, Chunzhi Cui* and Dong June Ahn*, ","doi":"10.1021/acs.nanolett.5c0142210.1021/acs.nanolett.5c01422","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01422https://doi.org/10.1021/acs.nanolett.5c01422","url":null,"abstract":"Micrometer-scale polarized polymeric rectangles with nanometer-scale thicknesses were fabricated through the simple reprecipitation of selected diacetylenic surfactants, exhibiting anisotropic responses to directional external fields. These 2D rectangular plates feature linearly conjugated poly(diacetylene) backbones aligned along their shorter side over large domains, enabling unique angle-dependent polarization of visible light and fluorescent emission. The conformity to Malus’s law confirms the reliability of the linear polarization demonstrated by these plates. In addition to optical anisotropy, these polymer rectangles exhibit an orientation-dependent mechanical response. When tensile force is applied parallel to the shorter side or polymer backbone, the plates undergo a distinct visual color transition; however, little to no change occurs when the force is applied perpendicularly. Such an anisotropic response behavior of 2D rectangular plates is further validated by molecular dynamics simulations. This work provides a strategic framework for materials chemistry design that enables optical reflection of orientation-dependent external fields.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5529–5538 5529–5538"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745962","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-Efficiency Dry-Jet Wet Spinning of Ultratoughness Regenerated Wool Keratin Fibers

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.4c0518110.1021/acs.nanolett.4c05181

Yalin Dong, Jinlin Yu, Xian Wen, Zhaoyang Sun, Yikun Duan, Liming Wang* and Xiaohong Qin*,

{"title":"High-Efficiency Dry-Jet Wet Spinning of Ultratoughness Regenerated Wool Keratin Fibers","authors":"Yalin Dong, Jinlin Yu, Xian Wen, Zhaoyang Sun, Yikun Duan, Liming Wang* and Xiaohong Qin*, ","doi":"10.1021/acs.nanolett.4c0518110.1021/acs.nanolett.4c05181","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05181https://doi.org/10.1021/acs.nanolett.4c05181","url":null,"abstract":"Regenerated wool keratin fibers (RWKFs) featuring their ecofriendliness, ample resources, and intrinsic biocompatibility have attracted significant interest, while their high-value-added applications are still severely limited by inadequate mechanical properties and complex fabrication processes. Herein, a straightforward dry-jet wet spinning technique without post-treatment processes is proposed to prepare ultratoughness RWKFs. The as-spun fibers achieve a macroscale hierarchical structure due to the preorientation of nanoscale α-keratin protofibrils in air-gap drawing of dry-jet wet spinning, while α-keratins are preserved in large quantities because of no additional post-treatment stretching. As a result, the fabricated RWKFs achieve a tensile strength of ∼142.7 MPa, an outstanding elongation of ∼171.7%, and a record high toughness of ∼176.3 MJ m–3, outperforming natural wool and previously reported regenerated keratin fibers. Moreover, the reported RWKFs’ dyeability, moisture-induced shape-memory capacity, and electric generation performance remarkably expand their applications in textiles or even smart apparel.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5078–5086 5078–5086"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746121","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

Nanosized Membrane Fusion-Triggered Three-Dimensional DNA Walker for Subtype-Specific Analysis of Breast Cancer Extracellular Vesicles

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.5c0122110.1021/acs.nanolett.5c01221

Zhikai Fang, Ayong Cao, Zichen Huang, Xi Jin, Zhan Zhang, Ya Cao*, Jing Zhao* and Xiaolei Zuo*,

{"title":"Nanosized Membrane Fusion-Triggered Three-Dimensional DNA Walker for Subtype-Specific Analysis of Breast Cancer Extracellular Vesicles","authors":"Zhikai Fang, Ayong Cao, Zichen Huang, Xi Jin, Zhan Zhang, Ya Cao*, Jing Zhao* and Xiaolei Zuo*, ","doi":"10.1021/acs.nanolett.5c0122110.1021/acs.nanolett.5c01221","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01221https://doi.org/10.1021/acs.nanolett.5c01221","url":null,"abstract":"Extracellular vesicles (EVs) are highly attractive in cancer diagnosis, owing to their ability to reflect the molecular characteristics of the source cells. Herein, we engineer a DNA-equipped liposome nanoprobe for developing a nanosized membrane fusion-triggered three-dimensional (3D) DNA walker for the analysis of breast cancer EVs. Specifically, liposome nanoprobes efficiently fuse with target EVs by recognizing surface-expressed epidermal growth factor receptors, thereby creating 3D tracks for the DNA walker. Subsequently, walking probes targeting human epidermal growth factor receptor-2 (HER-2) were recruited onto the fused vesicles to manipulate the walker, eventually generating considerable electrochemical signals. Results reveal a good linearity between the electrochemical output and the target EV concentration and also prove the ability of the membrane fusion-triggered DNA walker to differentiate HER-2-positive breast cancer patients and monitor the disease progression. Taken together, this work presents an effective approach for the early and subtype-specific diagnosis of breast cancer.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5512–5519 5512–5519"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745966","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

Maintaining Grain Boundary Segregation-Induced Strengthening Effect in Extremely Fine Nanograined Metals

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-23 DOI: 10.1021/acs.nanolett.5c0103210.1021/acs.nanolett.5c01032

Lei Qian, Jiacheng Zhang, Wenqing Yang, Yunjiang Wang, Kangcheung Chan and Xu-Sheng Yang*,

{"title":"Maintaining Grain Boundary Segregation-Induced Strengthening Effect in Extremely Fine Nanograined Metals","authors":"Lei Qian, Jiacheng Zhang, Wenqing Yang, Yunjiang Wang, Kangcheung Chan and Xu-Sheng Yang*, ","doi":"10.1021/acs.nanolett.5c0103210.1021/acs.nanolett.5c01032","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01032https://doi.org/10.1021/acs.nanolett.5c01032","url":null,"abstract":"Reinforcing grain boundaries through solute segregation is a promising strategy to strengthen nanograined metals. However, maintaining strengthening in extremely fine nanograined metals poses challenges due to grain size reduction and grain boundary structural changes from excessive segregation. This study employs hybrid Monte Carlo/Molecular Dynamics simulations to investigate the interplay between solute concentration, grain boundary structure, deformation mechanism, and strength in Zr-segregated nanograined Cu. Results exhibit significant strength enhancement by optimizing segregation, extending the strengthening effect to a grain size as small as 3.75 nm. Continuous Zr segregation induces a progressive transition from original grain boundaries to segregated and ultimately amorphous grain boundaries. Amorphization alters the dominant deformation mechanism from grain boundary migration to homogeneous shear-transformation-zone activation, fostering and optimizing the strengthening effect in extremely fine nanograined Cu. These findings inspire a novel approach of segregation-induced grain boundary amorphization to leverage strong boundaries and extremely fine nanograins for strengthening nanograined metals.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5493–5501 5493–5501"},"PeriodicalIF":9.6,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.nanolett.5c01032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745897","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

Biomass-Derived Gradient and Aligned Structured Aerogel for Sustainable Agricultural Irrigation

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-23 DOI: 10.1021/acs.nanolett.5c00520

Lanyue Zhang, Zhanhong Yuan, Xiaotong Fu, Shiang Shi, Xiang Chen, Pan Chen, Dongdong Ye

{"title":"Biomass-Derived Gradient and Aligned Structured Aerogel for Sustainable Agricultural Irrigation","authors":"Lanyue Zhang, Zhanhong Yuan, Xiaotong Fu, Shiang Shi, Xiang Chen, Pan Chen, Dongdong Ye","doi":"10.1021/acs.nanolett.5c00520","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00520","url":null,"abstract":"Interface evaporation-driven hydroelectric systems integrating water purification and energy collection offer the potential for sustainable agricultural irrigation. However, achieving high evaporation rates and efficient energy harvesting poses challenges, particularly in optimizing evaporation and water transport. This study develops a gradient-aligned structured aerogel (GA aerogel), composed of biomass materials such as cellulose and chitosan, which utilizes efficient water transport through aligned cellulose channels, unique ion management in nanoscale channels, and chitosan’s ability to reduce evaporation energy consumption, thereby enhancing water and energy harvesting performance. The GA aerogel achieves a solar absorption rate of 91.4%, an evaporation rate of 2.5 kg m–2 h–1, an output power of 680 nW cm–2, and stable operation for over 120 h. Furthermore, by integrating a series array with capacitive energy storage, the system utilizes harvested electrical energy to irrigate plants with purified water, promoting sustainable agriculture and providing insights for designing biomass-based solar evaporators.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"23 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678010","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

A Close-Space Fast Nucleation Strategy toward High-Efficiency Perovskite Light-Emitting Diodes

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-23 DOI: 10.1021/acs.nanolett.5c00004

Xinwen Sun, Dongliang Ding, Zhiguo Nie, Bo Wu, Patrick W. K. Fong, Shirong Qiu, Ting Liang, Gang Li, Jianbin Xu, Mingzhu Long

{"title":"A Close-Space Fast Nucleation Strategy toward High-Efficiency Perovskite Light-Emitting Diodes","authors":"Xinwen Sun, Dongliang Ding, Zhiguo Nie, Bo Wu, Patrick W. K. Fong, Shirong Qiu, Ting Liang, Gang Li, Jianbin Xu, Mingzhu Long","doi":"10.1021/acs.nanolett.5c00004","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00004","url":null,"abstract":"Halide perovskite light-emitting diodes (PeLEDs), considered as potential candidates for future displays, face significant limitations in their external quantum efficiency (EQE) due to an uncontrollable nucleation and crystallization process. Herein, a close-space inverted annealing (CSIA) strategy is developed to achieve fast nucleation and obtain a more uniform perovskite film with larger crystal domains and much lower defect centers. The increased surficial temperature and quick solvent evaporation in the CSIA method result in the fast formation of numerous large nuclei and solvate intermediates at the initial stage, which effectively guide crystal growth into large domains, facilitated by the residual solvent. The CSIA-processed PeLED achieves a peak EQE of 25.8%, which is among the best values of near-infrared devices. Moreover, it is applicable to perovskite-emitting layers with different defect passivation agents. This straightforward approach highlights a great opportunity to boost the performance and commercialization of perovskite optoelectronic devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"94 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678008","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

A Close-Space Fast Nucleation Strategy toward High-Efficiency Perovskite Light-Emitting Diodes

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-23 DOI: 10.1021/acs.nanolett.5c0000410.1021/acs.nanolett.5c00004

Xinwen Sun, Dongliang Ding, Zhiguo Nie, Bo Wu, Patrick W. K. Fong, Shirong Qiu, Ting Liang, Gang Li, Jianbin Xu* and Mingzhu Long*,

{"title":"A Close-Space Fast Nucleation Strategy toward High-Efficiency Perovskite Light-Emitting Diodes","authors":"Xinwen Sun, Dongliang Ding, Zhiguo Nie, Bo Wu, Patrick W. K. Fong, Shirong Qiu, Ting Liang, Gang Li, Jianbin Xu* and Mingzhu Long*, ","doi":"10.1021/acs.nanolett.5c0000410.1021/acs.nanolett.5c00004","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00004https://doi.org/10.1021/acs.nanolett.5c00004","url":null,"abstract":"Halide perovskite light-emitting diodes (PeLEDs), considered as potential candidates for future displays, face significant limitations in their external quantum efficiency (EQE) due to an uncontrollable nucleation and crystallization process. Herein, a close-space inverted annealing (CSIA) strategy is developed to achieve fast nucleation and obtain a more uniform perovskite film with larger crystal domains and much lower defect centers. The increased surficial temperature and quick solvent evaporation in the CSIA method result in the fast formation of numerous large nuclei and solvate intermediates at the initial stage, which effectively guide crystal growth into large domains, facilitated by the residual solvent. The CSIA-processed PeLED achieves a peak EQE of 25.8%, which is among the best values of near-infrared devices. Moreover, it is applicable to perovskite-emitting layers with different defect passivation agents. This straightforward approach highlights a great opportunity to boost the performance and commercialization of perovskite optoelectronic devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5258–5264 5258–5264"},"PeriodicalIF":9.6,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746240","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

Biomass-Derived Gradient and Aligned Structured Aerogel for Sustainable Agricultural Irrigation

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-23 DOI: 10.1021/acs.nanolett.5c0052010.1021/acs.nanolett.5c00520

Lanyue Zhang, Zhanhong Yuan, Xiaotong Fu, Shiang Shi, Xiang Chen, Pan Chen and Dongdong Ye*,

{"title":"Biomass-Derived Gradient and Aligned Structured Aerogel for Sustainable Agricultural Irrigation","authors":"Lanyue Zhang, Zhanhong Yuan, Xiaotong Fu, Shiang Shi, Xiang Chen, Pan Chen and Dongdong Ye*, ","doi":"10.1021/acs.nanolett.5c0052010.1021/acs.nanolett.5c00520","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00520https://doi.org/10.1021/acs.nanolett.5c00520","url":null,"abstract":"Interface evaporation-driven hydroelectric systems integrating water purification and energy collection offer the potential for sustainable agricultural irrigation. However, achieving high evaporation rates and efficient energy harvesting poses challenges, particularly in optimizing evaporation and water transport. This study develops a gradient-aligned structured aerogel (GA aerogel), composed of biomass materials such as cellulose and chitosan, which utilizes efficient water transport through aligned cellulose channels, unique ion management in nanoscale channels, and chitosan’s ability to reduce evaporation energy consumption, thereby enhancing water and energy harvesting performance. The GA aerogel achieves a solar absorption rate of 91.4%, an evaporation rate of 2.5 kg m–2 h–1, an output power of 680 nW cm–2, and stable operation for over 120 h. Furthermore, by integrating a series array with capacitive energy storage, the system utilizes harvested electrical energy to irrigate plants with purified water, promoting sustainable agriculture and providing insights for designing biomass-based solar evaporators.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5383–5390 5383–5390"},"PeriodicalIF":9.6,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746014","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

Maintaining Grain Boundary Segregation-Induced Strengthening Effect in Extremely Fine Nanograined Metals

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-23 DOI: 10.1021/acs.nanolett.5c01032

Lei Qian, Jiacheng Zhang, Wenqing Yang, Yunjiang Wang, Kangcheung Chan, Xu-Sheng Yang

{"title":"Maintaining Grain Boundary Segregation-Induced Strengthening Effect in Extremely Fine Nanograined Metals","authors":"Lei Qian, Jiacheng Zhang, Wenqing Yang, Yunjiang Wang, Kangcheung Chan, Xu-Sheng Yang","doi":"10.1021/acs.nanolett.5c01032","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01032","url":null,"abstract":"Reinforcing grain boundaries through solute segregation is a promising strategy to strengthen nanograined metals. However, maintaining strengthening in extremely fine nanograined metals poses challenges due to grain size reduction and grain boundary structural changes from excessive segregation. This study employs hybrid Monte Carlo/Molecular Dynamics simulations to investigate the interplay between solute concentration, grain boundary structure, deformation mechanism, and strength in Zr-segregated nanograined Cu. Results exhibit significant strength enhancement by optimizing segregation, extending the strengthening effect to a grain size as small as 3.75 nm. Continuous Zr segregation induces a progressive transition from original grain boundaries to segregated and ultimately amorphous grain boundaries. Amorphization alters the dominant deformation mechanism from grain boundary migration to homogeneous shear-transformation-zone activation, fostering and optimizing the strengthening effect in extremely fine nanograined Cu. These findings inspire a novel approach of segregation-induced grain boundary amorphization to leverage strong boundaries and extremely fine nanograins for strengthening nanograined metals.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"35 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678011","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 3D-Nanoprinted Optical Sensilla for Bidirectional Respiratory Monitoring

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-22 DOI: 10.1021/acs.nanolett.5c0081810.1021/acs.nanolett.5c00818

Liangye Li, Xuhao Fan, Wangyang Xu, Zongjing Li, Zhi Zhang, Weiliang Zhao, Shixiong Zhang, Zhe Zhao, Shaoxi Shi, Hui Gao, Zhijun Yan, Wei Xiong* and Qizhen Sun*,

{"title":"Bioinspired 3D-Nanoprinted Optical Sensilla for Bidirectional Respiratory Monitoring","authors":"Liangye Li, Xuhao Fan, Wangyang Xu, Zongjing Li, Zhi Zhang, Weiliang Zhao, Shixiong Zhang, Zhe Zhao, Shaoxi Shi, Hui Gao, Zhijun Yan, Wei Xiong* and Qizhen Sun*, ","doi":"10.1021/acs.nanolett.5c0081810.1021/acs.nanolett.5c00818","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00818https://doi.org/10.1021/acs.nanolett.5c00818","url":null,"abstract":"Chronic respiratory diseases (CRDs) are the leading causes of death worldwide. Monitoring both inhalation and exhalation is crucial for lung function assessment and patient outcomes. However, current sensors lack sufficient stability and also lack the ability to differentiate between inhalation and exhalation, limiting clinical effectiveness. Inspired by bat-wing hair structures, we report an all-optical fiber sensilla for bidirectional airflow detection. Optical Merkel cells and microhairs are integrated at the fiber tip through femtosecond laser 3D nanoprinting. Bidirectional airflow interacts with the hair structures, inducing opposing nanoscale deformations of the Merkel cells, which causes spectral drift in different directions. The device enables bidirectional flow detection with sensitivities of 19.16 nm/(L/min) and −24.46 nm/(L/min), a record-high stability over 10,000 cycles. The ultracompact design allows seamless integration into trachea or masks. The device effectively identifies respiratory patterns, distress signals, and apnea signs, providing a noninvasive and precise tool for CRD management and emergency response.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5452–5460 5452–5460"},"PeriodicalIF":9.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746101","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