{"title":"A Biocompatible and Self-Healable 3D-Printed Bidirectional Hydrogel Actuator with Needle Injectability","authors":"Kai-Ruei Yang, Qian-Pu Cheng, Shan-hui Hsu","doi":"10.1021/acsami.5c14232","DOIUrl":"https://doi.org/10.1021/acsami.5c14232","url":null,"abstract":"Multifunctional hydrogels are highly desirable for emerging material applications, particularly for biocompatible hydrogel actuators. However, integrating toughness, self-healing, and reversible bidirectional actuation into a biocompatible actuator remains challenging. Herein, a 3D-printable and biocompatible bilayer hydrogel actuator with reversible bidirectional actuation is developed using a new poly(<i>N</i>-isopropylacrylamide)-gelatin methacryloyl (PNIPAM-GelMA; “PNG”) hydrogel as the active layer. The photo-cross-linked PNG hydrogel shows self-healing ability as well as good elasticity (storage modulus ∼13 kPa) and toughness (linear viscoelastic range up to 240% shear strain). Small-angle X-ray scattering analysis for the microstructure of PNG reveals the presence of dynamic PNIPAM clusters composed of interlocking PNIPAM side chains, accounting for the self-healing behavior of the PNG hydrogel. The 3D-printed bilayer actuator with PNG as the active layer and GelMA as the passive layer exhibits bidirectional actuation and fine needle injectability. Moreover, pairing the PNG active layer with a self-healable passive layer (e.g., polyurethane-GelMA composite hydrogel) gives rise to a self-healable actuator. This actuator, repaired upon cutting, retains significant bidirectional bending angles (∼380° at 37 °C; ∼−270° at 25 °C). The multifunctional PNG system effectively addresses key limitations of current biocompatible hydrogel actuators by integrating toughness, autonomous self-healing ability, and reversible bidirectional actuation, offering substantial progress in developing actuators for biomedical applications.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"40 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hsin-Chiao Wu, Yu-Wei Huang, Yu-Chang Lin, Chu-Hsin Yang, Ta-Chung Liu
{"title":"Enhanced Zn/ZnO Heterointerfaces via Pulsed-Potential Electrochemical Reconstruction for Highly Selective CO2 Reduction","authors":"Hsin-Chiao Wu, Yu-Wei Huang, Yu-Chang Lin, Chu-Hsin Yang, Ta-Chung Liu","doi":"10.1021/acsami.5c11775","DOIUrl":"https://doi.org/10.1021/acsami.5c11775","url":null,"abstract":"The electrochemical carbon dioxide reduction reaction (CO<sub>2</sub>RR) demands advanced low-cost cathodes that can overcome the intrinsic scaling limits of single-phase metals. Accordingly, we report a pulsed-potential-based square wave voltammetry (SWV) strategy to reconstruct ZnO nanoparticles into metallic Zn nanoislands embedded on the ZnO wurtzite surface, generating an enhanced density of Zn/ZnO heterointerfaces. TEM/FFT and XPS analyses confirmed more finely discrete metallic Zn domains with a balanced Zn(0)/Zn(II) ratio for the SWV-ZnO electrocatalyst. At these heterojunctions, they preferentially stabilized the *COOH intermediate and weakened *H adsorption, thereby suppressing the competing hydrogen evolution reaction. The SWV-ZnO delivered a peak CO Faradaic efficiency of 90% with a CO partial current density of 5.3 mA/cm<sup>2</sup> at −1.05 V versus RHE in the H-cell, outperforming the pristine zinc nanoparticles and the previously reported potentiostatic reconstruction strategies (CA-ZnO). This work demonstrated that pulsed-potential electrochemical reconstruction offered a rapid and scalable route to engineer heterointerfaces, providing a practical blueprint for advancing sustainable CO<sub>2</sub>-to-CO conversion technologies.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"157 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145203921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yu-Jeong Yang, So-Yeon Kim, Abin Kim, Chunggi Jung, Kyungjun Kim, SungJi Kim, Gi-Yeop Kim, Kyung Song, Sang-Min Lee, Byoungwoo Kang, Si-Young Choi
{"title":"Rechargeable, Ambient-Stable Li-Ion Probe toward <i>In Situ</i> TEM for Electrochemical Dynamics.","authors":"Yu-Jeong Yang, So-Yeon Kim, Abin Kim, Chunggi Jung, Kyungjun Kim, SungJi Kim, Gi-Yeop Kim, Kyung Song, Sang-Min Lee, Byoungwoo Kang, Si-Young Choi","doi":"10.1021/acsami.5c01176","DOIUrl":"https://doi.org/10.1021/acsami.5c01176","url":null,"abstract":"<p><p>Lithium-ion batteries, particularly those employing lithium metal-based anodes, have garnered significant attention as energy storage systems due to their high energy density during charge-discharge cycles. However, the fundamental mechanisms underlying the microstructural evolution during cycling remain insufficiently understood. Here, we introduce a rechargeable Li-ion probe specifically designed for real-time transmission electron microscopy (TEM) analysis of electrode materials. The probe withstands electron beam irradiation and preserves its functionality under ambient conditions, enabling repeated <i>in situ</i> TEM measurements. By applying galvanostatic conditions, we employed this Li-ion probe to visualize (de)lithiation processes in both a lithiophilic LiAu<sub>3</sub> electrode and a lithiophobic Ni electrode. Furthermore, this probe is not limited to specific electrode materials but can be adapted for a wide range of battery components, including cathodes, anodes, and current collectors, making it a versatile tool for advanced energy storage research. Our findings demonstrate that the Li-ion probe facilitates critical insights into the interplay between the electrode microstructure and electrochemical behavior, thereby paving the way for advanced battery characterization techniques. This innovation establishes a foundation for future research aimed at unraveling the dynamic behavior of lithium-based electrodes during prolonged cycling.</p>","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":" ","pages":""},"PeriodicalIF":8.2,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Minseok Moon, Seungwoo Hwang, Jaesun Kim, Yutack Park, Changho Hong, Seungwu Han
{"title":"Unveiling Defect Motifs in Amorphous GeSe Using Machine Learning Interatomic Potentials.","authors":"Minseok Moon, Seungwoo Hwang, Jaesun Kim, Yutack Park, Changho Hong, Seungwu Han","doi":"10.1021/acsami.5c12334","DOIUrl":"https://doi.org/10.1021/acsami.5c12334","url":null,"abstract":"<p><p>Ovonic threshold switching (OTS) selectors are pivotal in nonvolatile memory devices due to their nonlinear electrical characteristics and polarity-dependent threshold voltages. However, the atomic-scale origins of the defect states responsible for these behaviors remain unclear. In this study, we systematically investigate defects in amorphous GeSe using molecular dynamics simulations accelerated by machine learning interatomic potentials (MLIPs). We first benchmark several MLIP architectures, including descriptor-based potentials and graph neural network (GNN)-based potentials. Our results demonstrate that capturing higher-order interactions, at least four-body correlations, and medium-range structural order is essential for accurately representing amorphous GeSe structures. Our analysis indicates that GNN architectures with multiple interaction layers effectively capture higher-order correlations and medium-range order, thereby preventing spurious defects easily introduced by less descriptive MLIPs. Utilizing the optimized GNN model, we identify two distinct defect motifs across 20 independent 960-atom amorphous GeSe structures: aligned Ge chains associated with defect states near the conduction band, and overcoordinated Ge chains linked to defect states near the valence band. Moreover, we establish correlations between electronic defect levels and specific structural features─namely, the average alignment of bond angles in aligned chains and the degree of local Peierls distortion around overcoordinated Ge atoms. These insights provide a theoretical framework for interpreting experimental observations and deepening the understanding of defect-driven OTS phenomena in amorphous GeSe.</p>","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":" ","pages":""},"PeriodicalIF":8.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jie Yang,Shuxuan Zhao,Lan Jiang,Jie Hu,Xushi Niu,Junjun Ni,Weina Han
{"title":"Enhanced Wound Healing Using Curcumin-Loaded Janus Dressings Fabricated by Femtosecond Laser-Assisted Molding.","authors":"Jie Yang,Shuxuan Zhao,Lan Jiang,Jie Hu,Xushi Niu,Junjun Ni,Weina Han","doi":"10.1021/acsami.5c13577","DOIUrl":"https://doi.org/10.1021/acsami.5c13577","url":null,"abstract":"Wound dressings play crucial roles in clinical wound management, serving as integral components repairing of damaged skin barriers. Herein, a curcumin-loaded asymmetric-wettability Janus polydimethylsiloxane wound dressing with surface microstructures is developed via a combined approach involving femtosecond laser technology and template replication. The prepared dressing has a hydrophobic outer surface, which offers antifouling and anticontamination characteristics, and an inner surface featuring groove-like micro/nanostructures with a hydrophilic coating, which collectively improve in vitro NIH/3T3 cell proliferation. Furthermore, the structures significantly increase the loading efficiency of curcumin and decrease its release rate, improving the antibacterial properties of the dressing. In vivo evaluation showed that the dressing effectively accelerates wound healing and epithelial tissue regeneration, achieving a wound healing rate of 95.89% within after 13 days of treatment. This study provides valuable insights into the design and development of drug-loaded Janus wound dressings, which have promising potential for improving wound healing outcomes.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"11 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145194973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synergistic Activation of the STING Pathway via a Mn(II)-Cross-Linked Gel Scaffold To Boost Antitumor Immunotherapy.","authors":"Jiawei Yuan,Jingjing Du,Zixuan Wang,Lihui Ren,Shangwen Zhang,Muhan Chen,Jun Yang,Shu Wei,Jiayun Xu,Hongcheng Sun,Junqiu Liu,Shuangjiang Yu","doi":"10.1021/acsami.5c14273","DOIUrl":"https://doi.org/10.1021/acsami.5c14273","url":null,"abstract":"The development of advanced therapeutic stents to increase anticancer efficiency and bolster antitumor immunity remains a considerable challenge. In this work, a therapeutic gel scaffold made from Mn2+-cross-linked sodium alginate (Mn(II)-SA-Gel), which contains a stimulator of interferon genes (STING) agonist (ADU-S100) and an immune checkpoint inhibitor (aCTLA-4), was developed as a drug delivery system for cancer therapy. The gel scaffold preserved its structural integrity and facilitated prolonged drug release via ion coordination exchange with Ca2+ present in bodily fluids. In addition to serving as a cross-linking agent during gel formation, Mn2+ also facilitates the activation of the STING signaling pathway by ADU-S100, induces dendritic cell maturation, and promotes the polarization of M1 macrophages. Moreover, Mn2+ promotes the generation of highly cytotoxic hydroxyl free radicals in the presence of H2O2, and in combination with the immune checkpoint inhibitor aCTLA-4, enhances the T-cell immune response to enhance their powerful tumor cell-killing effect. The findings indicated that Mn(II)-SA-Gel could serve as a promising platform to synergistically stimulate the STING pathway, thereby improving cancer immunotherapy.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"33 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145194966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heng Li, Lei Zheng, Zhongquan Liao, Vlastimil Mazánek, Qiliang Wei, Tomáš Hartman, Saeed Ashtiani, Bing Wu, Zdenek Sofer
{"title":"Ionic Liquid Electrolyte Suppresses Deep Sodiation in Nb4P2S21/Mo2CTx Enabling Transition from Mixed-Voltage to Pure High-Voltage Operation for Sodium-Ion Battery Cathodes","authors":"Heng Li, Lei Zheng, Zhongquan Liao, Vlastimil Mazánek, Qiliang Wei, Tomáš Hartman, Saeed Ashtiani, Bing Wu, Zdenek Sofer","doi":"10.1021/acsami.5c10976","DOIUrl":"https://doi.org/10.1021/acsami.5c10976","url":null,"abstract":"Elemental sulfur has garnered significant attention due to its low cost and high theoretical capacity; however, its reliance on ether electrolytes leads to the formation of soluble polysulfides, thereby limiting its application. Sulfur-rich transition metal polysulfides demonstrate potential as sulfur-equivalent cathodes to replace conventional sulfur in alkali metal–sulfur batteries; however, adequate research in this area remains unrevealed. In this study, we investigate the Nb<sub>4</sub>P<sub>2</sub>S<sub>21</sub> in carbonate, ether, and ionic liquid electrolytes for sodium-ion battery testing. The material exhibits a high discharge capacity exceeding 1000 mAh/g and a prolonged discharge plateau at low potentials in both ether and carbonate electrolytes, same with other high-capacity phosphorus sulfide anodes via conversion reactions. When switching to the NaTFSI/[Emim]TFSI ionic liquid electrolyte, 96.3% of the initial discharge capacity in the 0–3 V range is retained above 0.8 V, with the suppression of low-voltage redox activity. This shift is attributed to the cointercalation of Na<sup>+</sup> and Emim<sup>+</sup> ions, preventing the materials from deep sodiation at lower voltage range. The incorporation of Mo<sub>2</sub>CT<sub><i>x</i></sub> MXene into the material further reduces electrochemical polarization and enhances cycle stability. During 100 cycles, a self-activation phenomenon occurs, resulting in a maximum capacity of 384 mAh/g, while the median voltage remains above 1.5 V, predominantly governed by a pair of reversible redox peaks. X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) analyses of postcycled material confirm the structural and compositional stability of the material during cycling. This study advances the understanding of sulfur-rich materials in sodium-ion batteries across various electrolytes, particularly ionic liquids.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"114 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145203941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synergistic Dual-Mode Cooling Enabled by h-BN/Al<sub>2</sub>O<sub>3</sub> Hybrid Composites for Efficient Thermal Management.","authors":"Yubeen Oh, Jeehoon Yu, Hyungu Im, Jaeho Lee, Youngjae Yoo","doi":"10.1021/acsami.5c14931","DOIUrl":"https://doi.org/10.1021/acsami.5c14931","url":null,"abstract":"<p><p>This study presents a high-performance, millimeter-thick, free-standing hybrid composite sheet for enhanced thermal management and energy efficiency. This material is developed by integrating microscale hexagonal boron nitride (h-BN) platelets and nanoscale alumina (Al<sub>2</sub>O<sub>3</sub>) nanoparticles within an epoxy matrix. This hybrid design achieves broadband solar reflectance via complementary scattering effects across the solar spectrum and ensures high mid-infrared emittance within the atmospheric transparency window (8-13 μm). The optimized composite sheet exhibits average reflectance values of approximately 80% in the ultraviolet-visible (UV-vis) region and 92% in the near-infrared (NIR) region, along with a mid-infrared emittance of 85%. Furthermore, the aligned h-BN network imparts an excellent out-of-plane thermal conductivity of 6.72 W m<sup>-1</sup> K<sup>-1</sup>, thereby enabling efficient heat dispersion. Theoretical simulations indicate that the proposed composite has a significantly enhanced net cooling power of up to 141 W m<sup>-2</sup>. Field tests conducted over 2 days in Anseong, South Korea, demonstrate a peak subambient temperature drop of -12.4 °C and a stable average daily cooling performance of -10.2 °C, thereby demonstrating an almost 2-fold increase in efficiency compared to the control samples. This confirms the effective dispersion of heat throughout the 2 mm thick film, which enables bulk cooling beyond a mere surface effect. These findings represent a significant advancement for durable, self-standing passive cooling materials, with great potential for sustainable thermal management in various applications. While buildings and stationary electronics are canonical PDRC targets, mobile platforms such as unmanned aerial vehicles (UAVs) face acute solar heating with minimal allowance for active cooling or parasitic mass. The present dual-mode sheet is directly relevant to UAV outer skins: broadband solar backscattering curbs solar gain on sunlit surfaces, while the aligned h-BN network spreads internally generated heat through the 2 mm thickness and into the airstream. The electrically insulating, corrosion-resistant ceramic/epoxy architecture further suits composite airframes.</p>","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":" ","pages":""},"PeriodicalIF":8.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145205001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nanointerfacial Engineering of a Copper-Based Electrocatalyst for the Selective Electrogeneration of Ammonia from Nitrate Pollution.","authors":"Nessa Hald,Emma Mast,Colleen Gately,Kenneth Flores,Sergi Garcia-Segura","doi":"10.1021/acsami.5c13543","DOIUrl":"https://doi.org/10.1021/acsami.5c13543","url":null,"abstract":"Nitrate (NO3-) pollution, driven by anthropogenic activities, is contaminating groundwater sources. Simultaneously, the demand for ammonia (NH3) is increasing due to its widespread applications. The electrochemical reduction of nitrate (ERN) is a popular method for converting nitrate into a high-value product (NH3) but is severely limited by the utilization of expensive and scarce platinum group metal (PGM) electrocatalysts. This study aims to address this issue by creating a cost-effective, green, and earth-abundant electrocatalyst without the addition of PGMs to enable ERN under galvanostatic operation. The surface of copper foam was modified through a combination of electrosynthesis and thermal treatment to incorporate CuO and Cu2O nanostructures on the Cu foam interface, directly impacting the ratios of Cu2+ to (Cu0 + Cu1+) and lattice oxygen to oxygen vacancies. The optimization of these ratios resulted in the development of a Cu-ET electrocatalyst that achieved 91% conversion of nitrate with 97.6% selectivity (46.5% increase) toward ammonia production within 1 h of ERN. The electrocatalyst maintained this excellent performance when monitored over continuous ERN cycles and demonstrated a reduction in material cost of over 5300x when compared to the average PGM electrocatalysts reported in the literature. This scalable and earth-abundant Cu-ET electrocatalyst surpasses the efficiency of PGM technologies at a fraction of the cost. Furthermore, the high selectivity demonstrates effective recovery and reuse of NH3, establishing a circular system and addressing both the issue of NO3- contamination and the demand for sustainable NH3 production.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"24 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145194605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vertical Field-Effect Near-Infrared Phototransistor with High Responsivity and Detectivity Based on a Au Nanowire Porous Source and a Mixed PbSe-HfO2 Sensing Layer.","authors":"Fawad Saeed,Rai Muhammad Dawood Sultan,Nasrud Din,Ibtissem Belaid,Ali Asghar,Abida Parveen,Damian Chinedu Onwudiwe,Byung Seong Bae,Mehmet Ertugrul,Ying Zhu,Sajid Hussain,Qasim Khan,Lei Wei","doi":"10.1021/acsami.5c11719","DOIUrl":"https://doi.org/10.1021/acsami.5c11719","url":null,"abstract":"Near-infrared (NIR) detection is essential for applications in optical communications, biomedical imaging, and environmental monitoring. However, conventional NIR photodiodes face inherent trade-offs between responsivity and noise, largely due to thermal excitation in narrow-bandgap materials often necessitating cryogenic cooling to achieve an acceptable performance. In this study, we demonstrate a vertical field-effect NIR phototransistor (VFEPT) that integrates a mixed lead selenide quantum dot (PbSeQD)-hafnium dioxide nanoparticle (HfO2 NP) sensing layer with a porous gold nanowire source, enabling significantly improved photodetection capabilities. The high permittivity of HfO2 facilitates substantial charge accumulation and modulates the Schottky junction, while its low electrical conductivity suppresses leakage current even in the presence of narrow-bandgap PbSeQDs. This synergistic configuration effectively reduces the dark current, minimizes noise, and enhances detectivity. Additionally, the large capacitance between the gate and the source boosts charge accumulation, resulting in an amplified photocurrent and enhanced responsivity. Under NIR illumination, PbSeQDs efficiently absorb photons and generate electron-hole pairs, reinforcing the gate-source electric field and further increasing charge accumulation, thereby yielding a substantial photocurrent gain while maintaining low noise levels. The proposed VFEPT achieves a high responsivity of 256 A W-1 and a detectivity of 2.5 × 1015 Jones at 1550 nm, outperforming conventional NIR photodiodes and demonstrating exceptional potential for low-noise, high-responsivity NIR detection.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"99 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145194965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}