ACS Applied Electronic Materials最新文献

{"title":"Fabrication and Characterization of Zinc Oxide Nanorods on Electrohydrodynamic Jet Printed Silver Micropillars","authors":"Elius Hossain, Kye-Si Kwon","doi":"10.1021/acsaelm.4c00946","DOIUrl":"https://doi.org/10.1021/acsaelm.4c00946","url":null,"abstract":"The integration of three-dimensional (3D) nanostructures into optoelectronic devices offers significant potential for performance enhancement and expanded functionality. However, the advancement of 3D nanostructures has been constrained by the absence of effective fabrication techniques. This study introduces a two-step fabrication method for 3D nanostructures, combining the growth of zinc oxide (ZnO) nanorods (NRs) on silver (Ag) micropillars (MPs). The Ag MPs, which exhibit a controlled aspect ratio, were fabricated using drop-on-demand electro-hydrodynamic (DoD-EHD) printing, achieving a maximum height of 67 μm, a diameter of 2.60 μm, and an aspect ratio of ∼26. The number and spacing of the pillars can be precisely adjusted via software and motion control, underscoring the method’s versatility in the production of diverse 3D structures. Subsequently, high-density ZnO nanorods (NRs) were grown on the surface of Ag micropillars (MPs) using the hydrothermal method, resulting in NRs with an average length of 5 μm and a diameter of 0.80 μm. Characterization of the resulting 3D structures demonstrated the uniform morphology, high crystallinity, and superior optical properties. The identification of a double-band regime at 3.05 eV for Ag MPs and that at 3.40 eV for ZnO NRs confirmed the successful formation of out-of-plane 3D metal-semiconductor heterojunctions, highlighting their potential for application in advanced optoelectronic devices.","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and Characterization of Zinc Oxide Nanorods on Electrohydrodynamic Jet Printed Silver Micropillars","authors":"Elius Hossain,&nbsp; and ,&nbsp;Kye-Si Kwon*,&nbsp;","doi":"10.1021/acsaelm.4c0094610.1021/acsaelm.4c00946","DOIUrl":"https://doi.org/10.1021/acsaelm.4c00946https://doi.org/10.1021/acsaelm.4c00946","url":null,"abstract":"<p >The integration of three-dimensional (3D) nanostructures into optoelectronic devices offers significant potential for performance enhancement and expanded functionality. However, the advancement of 3D nanostructures has been constrained by the absence of effective fabrication techniques. This study introduces a two-step fabrication method for 3D nanostructures, combining the growth of zinc oxide (ZnO) nanorods (NRs) on silver (Ag) micropillars (MPs). The Ag MPs, which exhibit a controlled aspect ratio, were fabricated using drop-on-demand electro-hydrodynamic (DoD-EHD) printing, achieving a maximum height of 67 μm, a diameter of 2.60 μm, and an aspect ratio of ∼26. The number and spacing of the pillars can be precisely adjusted via software and motion control, underscoring the method’s versatility in the production of diverse 3D structures. Subsequently, high-density ZnO nanorods (NRs) were grown on the surface of Ag micropillars (MPs) using the hydrothermal method, resulting in NRs with an average length of 5 μm and a diameter of 0.80 μm. Characterization of the resulting 3D structures demonstrated the uniform morphology, high crystallinity, and superior optical properties. The identification of a double-band regime at 3.05 eV for Ag MPs and that at 3.40 eV for ZnO NRs confirmed the successful formation of out-of-plane 3D metal-semiconductor heterojunctions, highlighting their potential for application in advanced optoelectronic devices.</p>","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct Reconstruction of the Band Diagram of Rhombohedral-Stacked Bilayer WSe2–Graphene Heterostructure via Photoemission Electron Microscopy","authors":"Mohamed Boutchich*,&nbsp;Keiki Fukumoto*,&nbsp;Aymen Mahmoudi,&nbsp;Alexandre Jaffré,&nbsp;José Alvarez,&nbsp;David Alamarguy,&nbsp;Chanan Euaruksakul,&nbsp;Fabrice Oehler and Abdelkarim Ouerghi,&nbsp;","doi":"10.1021/acsaelm.4c0096510.1021/acsaelm.4c00965","DOIUrl":"https://doi.org/10.1021/acsaelm.4c00965https://doi.org/10.1021/acsaelm.4c00965","url":null,"abstract":"<p >The determination of energy levels at heterointerfaces is important for understanding charge transport mechanisms, enabling judicious assembly of various electronic and optoelectronic devices. Herein, we investigated the interface properties of a heterostructure consisting of two-dimensional (2D) transition-metal dichalcogenides rhombohedral 3R (AB stacking) bilayer WSe₂ (3R-2 ML WSe₂) and epitaxial graphene using photoemission electron microscopy (PEEM) with a femtosecond laser excitation source. The 2D energy band diagram was imaged in an energy-resolved mode (ER-PEEM). For the 3R-2 ML WSe₂, the conduction band minimum and the exciton were located at 2.0 and 2.6 eV, respectively, while the valence band maximum was at 4.18 eV. The Fermi level of graphene was located at 4.08 eV. These observations were supported by photoluminescence and Kelvin probe atomic force microscopy results. Furthermore, we investigated carrier dynamics using the system in the time-resolved mode (TR-PEEM). We evidenced that irradiation with 2.4 eV pulses induced a surface photovoltage that relaxed within ∼25 ps. This methodology, coupling spectral and dynamic properties with space, time, and energy resolutions, allows the reconstruction of energy band diagrams and observation of the recombination mechanisms in nanoscale heterostructures. These parameters are instrumental for modeling and fabricating a wide range of heterojunction devices for photovoltaic and optoelectronic applications.</p>","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct Reconstruction of the Band Diagram of Rhombohedral-Stacked Bilayer WSe2–Graphene Heterostructure via Photoemission Electron Microscopy","authors":"Mohamed Boutchich, Keiki Fukumoto, Aymen Mahmoudi, Alexandre Jaffré, José Alvarez, David Alamarguy, Chanan Euaruksakul, Fabrice Oehler, Abdelkarim Ouerghi","doi":"10.1021/acsaelm.4c00965","DOIUrl":"https://doi.org/10.1021/acsaelm.4c00965","url":null,"abstract":"The determination of energy levels at heterointerfaces is important for understanding charge transport mechanisms, enabling judicious assembly of various electronic and optoelectronic devices. Herein, we investigated the interface properties of a heterostructure consisting of two-dimensional (2D) transition-metal dichalcogenides rhombohedral 3R (AB stacking) bilayer WSe₂ (3R-2 ML WSe₂) and epitaxial graphene using photoemission electron microscopy (PEEM) with a femtosecond laser excitation source. The 2D energy band diagram was imaged in an energy-resolved mode (ER-PEEM). For the 3R-2 ML WSe₂, the conduction band minimum and the exciton were located at 2.0 and 2.6 eV, respectively, while the valence band maximum was at 4.18 eV. The Fermi level of graphene was located at 4.08 eV. These observations were supported by photoluminescence and Kelvin probe atomic force microscopy results. Furthermore, we investigated carrier dynamics using the system in the time-resolved mode (TR-PEEM). We evidenced that irradiation with 2.4 eV pulses induced a surface photovoltage that relaxed within ∼25 ps. This methodology, coupling spectral and dynamic properties with space, time, and energy resolutions, allows the reconstruction of energy band diagrams and observation of the recombination mechanisms in nanoscale heterostructures. These parameters are instrumental for modeling and fabricating a wide range of heterojunction devices for photovoltaic and optoelectronic applications.","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Interfacial Disorder and Band Structure on the Resonant Conductance Oscillation in Quantum-Well-Based Magnetic Tunnel Junctions","authors":"Tianyi Ma, Bingshan Tao, Xavier Devaux, Hongxin Yang, Yalu Zuo, Sylvie Migot, Oleg Kurnosikov, Michel Vergnat, Xiufeng Han, Yuan Lu","doi":"10.1021/acsaelm.4c01202","DOIUrl":"https://doi.org/10.1021/acsaelm.4c01202","url":null,"abstract":"Quantum well (QW) states formed in a double-barrier magnetic tunnel junction (DMTJ) enable the coherent resonant tunneling of electrons. This phenomenon is significant for both the fundamental understanding of quantum transport and the development of advanced functionalities in spintronic devices. Careful engineering of the structural and chemical disorders at the QW/barrier interface is essential to maintain strong electron phase coherence, thereby ensuring reliable conductance oscillations in DMTJ. In this study, we systematically investigate the influence of interfacial disorders and band structure on QW-induced conductance oscillations in epitaxial Fe/MgAlO_<i>x</i>/Fe (QW)/MgAlO_<i>x</i>/Co/Fe DMTJs grown by molecular beam epitaxy. It is found that the amplitude of QW oscillations is reduced to one-third due to chemical disorders caused by the incorporation of 2–4 monolayers of Co at the Fe (QW)/MgAlO_<i>x</i> interface. In contrast, structural disorder induced by the incorporation of a single Fe monolayer completely suppresses the oscillations. In addition, the QW oscillation depends on the available majority Δ₁ states of the injecting electrons at the Fermi level (<i>E</i>_F) with <i>k</i>_// = 0 from the upper electrode. Replacing the Fe upper electrode with Fe₄N, which lacks a majority of Δ₁ states at <i>E</i>_F, significantly reduces the oscillation amplitude. Instead, using the bcc Co upper electrode, which possesses majority Δ₁ states, results in no change in QW oscillation. Our findings highlight the critical role of interfacial disorder and band structure in QW-induced conductance oscillations, advancing the development of spin-dependent quantum resonant tunneling applications.","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Interfacial Disorder and Band Structure on the Resonant Conductance Oscillation in Quantum-Well-Based Magnetic Tunnel Junctions","authors":"Tianyi Ma,&nbsp;Bingshan Tao,&nbsp;Xavier Devaux,&nbsp;Hongxin Yang,&nbsp;Yalu Zuo,&nbsp;Sylvie Migot,&nbsp;Oleg Kurnosikov,&nbsp;Michel Vergnat,&nbsp;Xiufeng Han* and Yuan Lu*,&nbsp;","doi":"10.1021/acsaelm.4c0120210.1021/acsaelm.4c01202","DOIUrl":"https://doi.org/10.1021/acsaelm.4c01202https://doi.org/10.1021/acsaelm.4c01202","url":null,"abstract":"<p >Quantum well (QW) states formed in a double-barrier magnetic tunnel junction (DMTJ) enable the coherent resonant tunneling of electrons. This phenomenon is significant for both the fundamental understanding of quantum transport and the development of advanced functionalities in spintronic devices. Careful engineering of the structural and chemical disorders at the QW/barrier interface is essential to maintain strong electron phase coherence, thereby ensuring reliable conductance oscillations in DMTJ. In this study, we systematically investigate the influence of interfacial disorders and band structure on QW-induced conductance oscillations in epitaxial Fe/MgAlO_<i>x</i>/Fe (QW)/MgAlO_<i>x</i>/Co/Fe DMTJs grown by molecular beam epitaxy. It is found that the amplitude of QW oscillations is reduced to one-third due to chemical disorders caused by the incorporation of 2–4 monolayers of Co at the Fe (QW)/MgAlO_<i>x</i> interface. In contrast, structural disorder induced by the incorporation of a single Fe monolayer completely suppresses the oscillations. In addition, the QW oscillation depends on the available majority Δ₁ states of the injecting electrons at the Fermi level (<i>E</i>_F) with <i>k</i>_// = 0 from the upper electrode. Replacing the Fe upper electrode with Fe₄N, which lacks a majority of Δ₁ states at <i>E</i>_F, significantly reduces the oscillation amplitude. Instead, using the bcc Co upper electrode, which possesses majority Δ₁ states, results in no change in QW oscillation. Our findings highlight the critical role of interfacial disorder and band structure in QW-induced conductance oscillations, advancing the development of spin-dependent quantum resonant tunneling applications.</p>","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Screen-Printed Capacitive Tactile Sensor for Monitoring Tool–Tissue Interactions and Grasping Performances of a Surgical Magnetic Microgripper","authors":"D. Anastasia Aubeeluck, Cameron Forbrigger, Sara Mohseni Taromsari, Tianhao Chen, Eric Diller, Hani E. Naguib","doi":"10.1021/acsaelm.4c00841","DOIUrl":"https://doi.org/10.1021/acsaelm.4c00841","url":null,"abstract":"With miniaturization and wireless actuation for a class of magnetic microgrippers for robot-assisted minimally invasive endoscopic intraventricular surgery, surgeons are unable to acquire tactile sensory information on tissues and organs during tool–tissue manipulation and grasping tasks. To minimize the risks of tissue trauma and improve surgical performance, surgeons require haptic feedback technologies to be integrated onto microscale surgical tools for tactile information. However, current sensors cannot be equipped onto the interior jaw of the microgripper due to low-pressure range and small-scale criteria for RMIS implementation for pediatric neurosurgery. This study proposes a 24 mm², ultrathin, and flexible capacitive tactile sensor for the interior jaws of a disposable surgical magnetically-controlled microgripper to potentially monitor and regulate tool–tissue manipulation pressures/forces in real time to improve grasping performances and quality of surgical procedures. To lower fabrication costs, multiple layers of the capacitive sensor were screen-printed and assembled to produce a 100 μm thick sensor. To enhance the range and sensitivity, four different morphologies were developed for the dielectric layer and integrated into the sensor design. The dielectric layers were fabricated by optimizing and processing thermoplastic polyurethane (TPU) into a suitable ink adequate for screen printing large surfaces and microstructures. The final optimized capacitive tactile sensor with a grid-like microstructured dielectric design’s electromechanical performance was modeled as a bilinear response with two sensitivity modes for a sensing range of 0.42–54.2 kPa (0.01–1.30 N applied on 24 mm² of gripper jaw). The results also indicated performance comparable to more expensive tactile sensors with a hysteresis of 8.8% and a repeatable response to applied cycling loadings with a maximum response signal decay of 1.85%. This study highlights that simple screen printing method can be used as a low-cost alternative to fabricate high-performance tactile sensors to be integrated to the interior jaw of the microgripper designed for disposable endoscopic intraventricular surgeries.","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coral-Inspired Capacitive Pressure Sensor with High Sensitivity and Wide Range for Human–Computer Interaction","authors":"Yuhang Wang,&nbsp;Ranxu Jing,&nbsp;Junxiang Jiang,&nbsp;Hongbo Wang,&nbsp;Linmao Qian,&nbsp;Bingjun Yu and Zhi-Jun Zhao*,&nbsp;","doi":"10.1021/acsaelm.4c0114010.1021/acsaelm.4c01140","DOIUrl":"https://doi.org/10.1021/acsaelm.4c01140https://doi.org/10.1021/acsaelm.4c01140","url":null,"abstract":"<p >Flexible capacitive pressure sensors have extensive applications in healthcare and human-computer interaction. However, current sensors face challenges in sensitivity, response range, and batch-to-batch consistency. Herein, inspired by coral, a capacitive pressure sensor featuring a Y-shaped dielectric layer is developed, offering high sensitivity and a wide detection range. The innovative biomimetic ″Y-shaped coral″ gradient tilt structure skillfully combines two effects: the change in contact area and the reduction in plate spacing, in response to pressure changes. This design not only expands the compressible range of the sensor but also achieves a good balance between high sensitivity and a wide response range. Experimental results show that the fabricated sensor exhibits high sensitivity (1.10 kPa^–1), a substantial response range (210 kPa), minimal hysteresis (≈3%), and excellent durability (withstanding over 20,000 cycles at 100 kPa). This sensor has broad application prospects in human-computer interaction, intelligent devices, flexible sensing arrays, and meteorological monitoring, enabling precise identification, real-time monitoring, and efficient support functions. Therefore, we believe that this study not only provides a design approach for capacitive pressure sensors but also offers strong support for technological advancement and application innovation in related fields.</p>","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Screen-Printed Capacitive Tactile Sensor for Monitoring Tool–Tissue Interactions and Grasping Performances of a Surgical Magnetic Microgripper","authors":"D. Anastasia Aubeeluck,&nbsp;Cameron Forbrigger,&nbsp;Sara Mohseni Taromsari,&nbsp;Tianhao Chen,&nbsp;Eric Diller and Hani E. Naguib*,&nbsp;","doi":"10.1021/acsaelm.4c0084110.1021/acsaelm.4c00841","DOIUrl":"https://doi.org/10.1021/acsaelm.4c00841https://doi.org/10.1021/acsaelm.4c00841","url":null,"abstract":"<p >With miniaturization and wireless actuation for a class of magnetic microgrippers for robot-assisted minimally invasive endoscopic intraventricular surgery, surgeons are unable to acquire tactile sensory information on tissues and organs during tool–tissue manipulation and grasping tasks. To minimize the risks of tissue trauma and improve surgical performance, surgeons require haptic feedback technologies to be integrated onto microscale surgical tools for tactile information. However, current sensors cannot be equipped onto the interior jaw of the microgripper due to low-pressure range and small-scale criteria for RMIS implementation for pediatric neurosurgery. This study proposes a 24 mm², ultrathin, and flexible capacitive tactile sensor for the interior jaws of a disposable surgical magnetically-controlled microgripper to potentially monitor and regulate tool–tissue manipulation pressures/forces in real time to improve grasping performances and quality of surgical procedures. To lower fabrication costs, multiple layers of the capacitive sensor were screen-printed and assembled to produce a 100 μm thick sensor. To enhance the range and sensitivity, four different morphologies were developed for the dielectric layer and integrated into the sensor design. The dielectric layers were fabricated by optimizing and processing thermoplastic polyurethane (TPU) into a suitable ink adequate for screen printing large surfaces and microstructures. The final optimized capacitive tactile sensor with a grid-like microstructured dielectric design’s electromechanical performance was modeled as a bilinear response with two sensitivity modes for a sensing range of 0.42–54.2 kPa (0.01–1.30 N applied on 24 mm² of gripper jaw). The results also indicated performance comparable to more expensive tactile sensors with a hysteresis of 8.8% and a repeatable response to applied cycling loadings with a maximum response signal decay of 1.85%. This study highlights that simple screen printing method can be used as a low-cost alternative to fabricate high-performance tactile sensors to be integrated to the interior jaw of the microgripper designed for disposable endoscopic intraventricular surgeries.</p>","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coral-Inspired Capacitive Pressure Sensor with High Sensitivity and Wide Range for Human–Computer Interaction","authors":"Yuhang Wang, Ranxu Jing, Junxiang Jiang, Hongbo Wang, Linmao Qian, Bingjun Yu, Zhi-Jun Zhao","doi":"10.1021/acsaelm.4c01140","DOIUrl":"https://doi.org/10.1021/acsaelm.4c01140","url":null,"abstract":"Flexible capacitive pressure sensors have extensive applications in healthcare and human-computer interaction. However, current sensors face challenges in sensitivity, response range, and batch-to-batch consistency. Herein, inspired by coral, a capacitive pressure sensor featuring a Y-shaped dielectric layer is developed, offering high sensitivity and a wide detection range. The innovative biomimetic ″Y-shaped coral″ gradient tilt structure skillfully combines two effects: the change in contact area and the reduction in plate spacing, in response to pressure changes. This design not only expands the compressible range of the sensor but also achieves a good balance between high sensitivity and a wide response range. Experimental results show that the fabricated sensor exhibits high sensitivity (1.10 kPa^–1), a substantial response range (210 kPa), minimal hysteresis (≈3%), and excellent durability (withstanding over 20,000 cycles at 100 kPa). This sensor has broad application prospects in human-computer interaction, intelligent devices, flexible sensing arrays, and meteorological monitoring, enabling precise identification, real-time monitoring, and efficient support functions. Therefore, we believe that this study not only provides a design approach for capacitive pressure sensors but also offers strong support for technological advancement and application innovation in related fields.","PeriodicalId":3,"journal":{"name":"ACS Applied Electronic Materials","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}