Pub Date : 2025-02-27DOI: 10.1016/j.surfin.2025.106122
Chunlin Wen , Zhenhua Tang , Tingsu Liu , Fan Qiu , Yan-Ping Jiang , Xin-Gui Tang , Yi-Chun Zhou , Xiangjun Xing , Ju Gao
Recently, Ga2O3-based devices with a wide bandgap have gained great attention in power semiconductor devices. However, Ga2O3-based devices with the substable crystalline phase and high performances need be further developed and discussed. In this work, the α-Ga2O3 thin films and GQDs/α-Ga2O3 heterojunctions were prepared by magnetron sputtering on the transparent FTO substrates with a buffer TiO2 layer. And, the good self-powered deep-ultraviolet photodetection performance and mechanisms were discussed in the GQDs/α-Ga2O3/α-TiO2/FTO devices: its responsivity to 254 nm UV light can reach 1.72 mA/W at a bias voltage of 0 V, a normalized detection rate of 1.7 × 1010 Jones and the light-to-dark current ratio (PDCR) of ∼1 were achieved due to the change of heterojunction energy band type from II to I. Moreover, the good self-powered deep UV photodetection for GQDs/α-Ga2O3/α-TiO2/FTO devices were demonstrated: a PDCR of 1.1 × 103, a self-powered responsivity (R) improved by a factor of 5 to 8.7 mA/W, the rise time (τr)/fall time (τf) of 86/39 ms, and a normalized detectivity (D*) with an improved magnitude of 1.3 to 2.3 × 1011 Jones were achieved by constructing GQDs/α-Ga2O3 heterojunctions on the outer surface of α-Ga2O3 thin film. These results can provide a reference for the future development of Ga2O3 thin film devices.
{"title":"High-performance, reliable and self-powered solar-blind photodetectors based on GQDs/α-Ga2O3 heterojunctions","authors":"Chunlin Wen , Zhenhua Tang , Tingsu Liu , Fan Qiu , Yan-Ping Jiang , Xin-Gui Tang , Yi-Chun Zhou , Xiangjun Xing , Ju Gao","doi":"10.1016/j.surfin.2025.106122","DOIUrl":"10.1016/j.surfin.2025.106122","url":null,"abstract":"<div><div>Recently, Ga<sub>2</sub>O<sub>3</sub>-based devices with a wide bandgap have gained great attention in power semiconductor devices. However, Ga<sub>2</sub>O<sub>3</sub>-based devices with the substable crystalline phase and high performances need be further developed and discussed. In this work, the α-Ga<sub>2</sub>O<sub>3</sub> thin films and GQDs/α-Ga<sub>2</sub>O<sub>3</sub> heterojunctions were prepared by magnetron sputtering on the transparent FTO substrates with a buffer TiO<sub>2</sub> layer. And, the good self-powered deep-ultraviolet photodetection performance and mechanisms were discussed in the GQDs/α-Ga<sub>2</sub>O<sub>3</sub>/α-TiO<sub>2</sub>/FTO devices: its responsivity to 254 nm UV light can reach 1.72 mA/W at a bias voltage of 0 V, a normalized detection rate of 1.7 × 10<sup>10</sup> Jones and the light-to-dark current ratio (PDCR) of ∼1 were achieved due to the change of heterojunction energy band type from II to I. Moreover, the good self-powered deep UV photodetection for GQDs/α-Ga<sub>2</sub>O<sub>3</sub>/α-TiO<sub>2</sub>/FTO devices were demonstrated: a PDCR of 1.1 × 10<sup>3</sup>, a self-powered responsivity (R) improved by a factor of 5 to 8.7 mA/W, the rise time (τ<sub>r</sub>)/fall time (τ<sub>f</sub>) of 86/39 ms, and a normalized detectivity (D*) with an improved magnitude of 1.3 to 2.3 × 10<sup>11</sup> Jones were achieved by constructing GQDs/α-Ga<sub>2</sub>O<sub>3</sub> heterojunctions on the outer surface of α-Ga<sub>2</sub>O<sub>3</sub> thin film. These results can provide a reference for the future development of Ga<sub>2</sub>O<sub>3</sub> thin film devices.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"62 ","pages":"Article 106122"},"PeriodicalIF":5.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579238","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}
Noble metal chalcogenides (nMC), special class of 2D non-layered materials, are gaining traction due to their exceptional qualities like high carrier mobility and higher active sites at surface. From optoelectronics perspective, their unsaturated dangling bonds lead to higher photoresponse but at expense of prolonged carrier lifetime, thereby making devices slower. Platinum monosulfide (PtS) is one such nMC possessing great potential but currently plagued with slower switching times and stability issues. Herein, we report an ultra-fast and self-powered broadband photodetector of PtS by interfacing with amorphous Ga2O3 leading to microsecond response. Heterojunction devices show speeds of 84µs/100µs at self-bias (biasing reduces it further) and are stable even after 7500 h as opposed to bare PtS device, which shows neither. Interfacial band alignment explains working of device, thereby, revealing synergistic combination of nMC with wide-bandgap material, broadening the horizon of nMC-based self-powered optoelectronics.
{"title":"Ultrafast, self-powered and highly-stable PtS-Ga₂O₃ heterojunction photodetector for broad-spectrum sensing","authors":"Damanpreet Kaur , Rohit Dahiya , Vinit Sheokand, Gaurav Bassi, Mukesh Kumar","doi":"10.1016/j.surfin.2025.106125","DOIUrl":"10.1016/j.surfin.2025.106125","url":null,"abstract":"<div><div>Noble metal chalcogenides (nMC), special class of 2D non-layered materials, are gaining traction due to their exceptional qualities like high carrier mobility and higher active sites at surface. From optoelectronics perspective, their unsaturated dangling bonds lead to higher photoresponse but at expense of prolonged carrier lifetime, thereby making devices slower. Platinum monosulfide (PtS) is one such nMC possessing great potential but currently plagued with slower switching times and stability issues. Herein, we report an ultra-fast and self-powered broadband photodetector of PtS by interfacing with amorphous Ga<sub>2</sub>O<sub>3</sub> leading to microsecond response. Heterojunction devices show speeds of 84µs/100µs at self-bias (biasing reduces it further) and are stable even after 7500 h as opposed to bare PtS device, which shows neither. Interfacial band alignment explains working of device, thereby, revealing synergistic combination of nMC with wide-bandgap material, broadening the horizon of nMC-based self-powered optoelectronics.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106125"},"PeriodicalIF":5.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549820","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}
Pub Date : 2025-02-26DOI: 10.1016/j.surfin.2025.106120
Shiqi Guo , Irina V. Chernyshova , Sathish Ponnurangam , Raymond S. Farinato
Meeting the world's energy and climate goals significantly increases demand for specific elements, including copper (Cu) and silver (Ag). Thionocarbamates, exemplified by O-isopropyl N-ethyl thionocarbamate (IPETC), are known for their high selectivity for Cu sulfides in froth flotation. However, the origins of the ligand's selectivity at the molecular level, its interaction with the important Cu sulfide minerals, and the role of pH in such interactions are still not well understood. Although Cu and Ag belong to the same group (IB) in the periodic table, in plant practice, IPETC is typically not known or used for Ag recovery from polymetallic ores. The reasons for such empirical differences are not known. To develop a better understanding of molecular level processes, we studied the interaction of IPETC with Cu and Ag metals as well as with covellite (CuS), chalcocite (Cu2S), and acanthite (Ag2S) at pH 5 and pH 9 using single-mineral micro-flotation, adsorption, X-ray photoelectron spectroscopy (XPS), electrochemistry, and density functional theory (DFT). Depending on the substrate, its oxidation state, and pH, IPETC can be adsorbed in protonated and/or deprotonated forms. The protonation state of IPETC impacts its adsorption density at the solid-liquid interface and mineral floatability. A mixture of protonated and deprotonated IPETC packs more tightly due to reduced electrostatic repulsion, suggesting a beneficial role of mixed adsorption for floatability. Deprotonation is explained by an electrochemical mechanism that includes proton-coupled electron transfer (PCET). The poorer flotation performance of IPETC on Ag2S compared to Cu sulfides is explained by the weaker coordination of Ag(I) with IPETC compared to Cu(I), combined with the greater chemical nobility (oxidation resistance) of Ag and Ag sulfides compared to Cu and Cu sulfides. These results shed light on the adsorption mechanism of IPETC and provide a foundation for applications of thionocarbamates in flotation, the development of more effective functional ligands, and the advancement of more sustainable separation techniques for metal sulfides in wastewater treatment and environmental remediation.
{"title":"Proton-coupled electron transfer (PCET) in thionocarbamate adsorption","authors":"Shiqi Guo , Irina V. Chernyshova , Sathish Ponnurangam , Raymond S. Farinato","doi":"10.1016/j.surfin.2025.106120","DOIUrl":"10.1016/j.surfin.2025.106120","url":null,"abstract":"<div><div>Meeting the world's energy and climate goals significantly increases demand for specific elements, including copper (Cu) and silver (Ag). Thionocarbamates, exemplified by O-isopropyl N-ethyl thionocarbamate (IPETC), are known for their high selectivity for Cu sulfides in froth flotation. However, the origins of the ligand's selectivity at the molecular level, its interaction with the important Cu sulfide minerals, and the role of pH in such interactions are still not well understood. Although Cu and Ag belong to the same group (IB) in the periodic table, in plant practice, IPETC is typically not known or used for Ag recovery from polymetallic ores. The reasons for such empirical differences are not known. To develop a better understanding of molecular level processes, we studied the interaction of IPETC with Cu and Ag metals as well as with covellite (CuS), chalcocite (Cu<sub>2</sub>S), and acanthite (Ag<sub>2</sub>S) at pH 5 and pH 9 using single-mineral micro-flotation, adsorption, X-ray photoelectron spectroscopy (XPS), electrochemistry, and density functional theory (DFT). Depending on the substrate, its oxidation state, and pH, IPETC can be adsorbed in protonated and/or deprotonated forms. The protonation state of IPETC impacts its adsorption density at the solid-liquid interface and mineral floatability. A mixture of protonated and deprotonated IPETC packs more tightly due to reduced electrostatic repulsion, suggesting a beneficial role of mixed adsorption for floatability. Deprotonation is explained by an electrochemical mechanism that includes proton-coupled electron transfer (PCET). The poorer flotation performance of IPETC on Ag<sub>2</sub>S compared to Cu sulfides is explained by the weaker coordination of Ag(I) with IPETC compared to Cu(I), combined with the greater chemical nobility (oxidation resistance) of Ag and Ag sulfides compared to Cu and Cu sulfides. These results shed light on the adsorption mechanism of IPETC and provide a foundation for applications of thionocarbamates in flotation, the development of more effective functional ligands, and the advancement of more sustainable separation techniques for metal sulfides in wastewater treatment and environmental remediation.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"62 ","pages":"Article 106120"},"PeriodicalIF":5.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579241","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}
The Ouzo effect, significant in cosmetics, health products, and pharmaceuticals, involves the formation of droplets through solvent exchange which leads to the supersaturation of solutes. This research investigates the thermodynamics of the Ouzo effect in the water-cyclohexane-ethanol system, taking into account the effect of the curved interface of the droplet for better understanding and control of droplet formation and its characteristics. Phase diagrams were plotted considering both flat and curved interfaces, and free energy calculations for the droplet-liquid system were performed based on the droplet radius. We investigated the effect of various factors, including feed composition, supersaturation, initial mole amount, and interfacial tension, to determine the energy barrier and droplet size in stable and unstable states. Our calculations confirm the experimental observations that the presence of a curved interface during droplet formation shifts the equilibrium composition towards the spinodal curve. Results also demonstrated that a stable cyclohexane-rich or water-rich droplet can form, after passing an energy barrier (unstable equilibrium), provided that adequate supersaturation exists in the confined solution. Increased supersaturation lowers the energy barrier and reduces the droplet radius in unstable states, facilitating droplet formation. Conversely, higher supersaturation results in the formation of more stable droplets with larger sizes. Verification against existing experimental data qualitatively validates the presented model.
{"title":"Ouzo effect: Insights from Gibbsian surface thermodynamics","authors":"Mahdi Mottaghi , Fatemeh Eslami , Leila Zargarzadeh","doi":"10.1016/j.surfin.2025.106115","DOIUrl":"10.1016/j.surfin.2025.106115","url":null,"abstract":"<div><div>The Ouzo effect, significant in cosmetics, health products, and pharmaceuticals, involves the formation of droplets through solvent exchange which leads to the supersaturation of solutes. This research investigates the thermodynamics of the Ouzo effect in the water-cyclohexane-ethanol system, taking into account the effect of the curved interface of the droplet for better understanding and control of droplet formation and its characteristics. Phase diagrams were plotted considering both flat and curved interfaces, and free energy calculations for the droplet-liquid system were performed based on the droplet radius. We investigated the effect of various factors, including feed composition, supersaturation, initial mole amount, and interfacial tension, to determine the energy barrier and droplet size in stable and unstable states. Our calculations confirm the experimental observations that the presence of a curved interface during droplet formation shifts the equilibrium composition towards the spinodal curve. Results also demonstrated that a stable cyclohexane-rich or water-rich droplet can form, after passing an energy barrier (unstable equilibrium), provided that adequate supersaturation exists in the confined solution. Increased supersaturation lowers the energy barrier and reduces the droplet radius in unstable states, facilitating droplet formation. Conversely, higher supersaturation results in the formation of more stable droplets with larger sizes. Verification against existing experimental data qualitatively validates the presented model.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106115"},"PeriodicalIF":5.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563389","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}
Pub Date : 2025-02-25DOI: 10.1016/j.surfin.2025.106109
Mehmet Ali Olğar , Salih Yılmaz , Fazal Rehman , Emin Bacaksız
This paper focuses on optimizing the reaction temperature of Sb2Se3 thin films for photodetector applications. The films were grown using a two-stage method on glass substrates. Structural analysis revealed the formation of the orthorhombic Sb2Se3 phase along the (020) plane, and increasing the reaction temperature up to 400 °C improved the crystal quality. Notably, the most promising structural properties were achieved for Sb2Se3 thin films reacted at 380 °C. Raman spectra confirmed the presence of tetragonal and amorphous selenium, along with Sb₂Se₃. Morphological analysis showed that a horizontally aligned rod morphology developed as the Sb2Se3 thin film grew, with the rod sizes increasing as the reaction temperature reached to 400 °C. X-ray photoelectron spectroscopy (XPS) revealed the formation of Sb-Se and Sb-O bonds, along with the presence of unreacted oxygen atoms near the surface of Sb₂Se₃ thin films reacted at 340 °C. Photoluminescence data indicated a bandgap value of 1.24 eV for Sb2Se3 films reacted at 380 °C. The current-voltage (I-V) curves exhibited a linear dependence for all Sb2Se3-based devices, suggesting ohmic contact between the films and the electrodes. The fastest photoresponse was observed for the photodetector annealed at 380 °C, with rise and fall times of 26 ms and 40 ms, respectively. Additionally, the highest responsivity (R = 8.0 × 10–4 A/W), detectivity (D* = 3.8 × 106 Jones), and external quantum efficiency (EQE = 16.3%) were achieved by the same device, indicating that the optimal reaction temperature for Sb2Se3 thin films and their photodetector applications is approximately at 380 °C.
{"title":"Exploring the relationship between reaction temperature and photodetection properties in Sb2Se3 thin film-based devices","authors":"Mehmet Ali Olğar , Salih Yılmaz , Fazal Rehman , Emin Bacaksız","doi":"10.1016/j.surfin.2025.106109","DOIUrl":"10.1016/j.surfin.2025.106109","url":null,"abstract":"<div><div>This paper focuses on optimizing the reaction temperature of Sb<sub>2</sub>Se<sub>3</sub> thin films for photodetector applications. The films were grown using a two-stage method on glass substrates. Structural analysis revealed the formation of the orthorhombic Sb<sub>2</sub>Se<sub>3</sub> phase along the (020) plane, and increasing the reaction temperature up to 400 °C improved the crystal quality. Notably, the most promising structural properties were achieved for Sb<sub>2</sub>Se<sub>3</sub> thin films reacted at 380 °C. Raman spectra confirmed the presence of tetragonal and amorphous selenium, along with Sb₂Se₃. Morphological analysis showed that a horizontally aligned rod morphology developed as the Sb<sub>2</sub>Se<sub>3</sub> thin film grew, with the rod sizes increasing as the reaction temperature reached to 400 °C. X-ray photoelectron spectroscopy (XPS) revealed the formation of Sb-Se and Sb-O bonds, along with the presence of unreacted oxygen atoms near the surface of Sb₂Se₃ thin films reacted at 340 °C. Photoluminescence data indicated a bandgap value of 1.24 eV for Sb<sub>2</sub>Se<sub>3</sub> films reacted at 380 °C. The current-voltage (I-V) curves exhibited a linear dependence for all Sb<sub>2</sub>Se<sub>3</sub>-based devices, suggesting ohmic contact between the films and the electrodes. The fastest photoresponse was observed for the photodetector annealed at 380 °C, with rise and fall times of 26 ms and 40 ms, respectively. Additionally, the highest responsivity (<em>R</em> = 8.0 × 10<sup>–4</sup> A/W), detectivity (D* = 3.8 × 10<sup>6</sup> Jones), and external quantum efficiency (EQE = 16.3%) were achieved by the same device, indicating that the optimal reaction temperature for Sb<sub>2</sub>Se<sub>3</sub> thin films and their photodetector applications is approximately at 380 °C.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106109"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526608","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}
Pub Date : 2025-02-25DOI: 10.1016/j.surfin.2025.106113
Shreya Ganguly, Sayantan Ganguly
Hexavalent Chromium [Cr(VI)] is a toxic heavy metal and a notable health hazard. Thus, proper remediation method must be employed for its removal from contaminated water. Iron–oxide nanoparticles have been employed multiple times as an adsorbent for the removal of Cr(VI); however, the adsorption capacity obtained was not sufficiently high.Therefore, this study attempts to synthesize iron–oxide nanoparticles at different temperatures of 25̊ °C, 60̊ °C, and 90̊ °C, respectively and improve both its adsorption efficiency and capacity substantially. Firstly, the iron–oxide nanoparticles were synthesized by the co–precipitation method and investigations on the surface morphologies, sizes, chemical compositions and magnetic properties were carried out by several characterization methods. Next, iron–oxide nanoparticles were used as adsorbents in batch equilibrium studies to effectively remove Cr(VI). A number of parameters, including dosage and contact time, were examined in order to determine how they affected the adsorption process. Using the iron–oxide nanoparticles synthesised at 25 °C (room temperature), 60 °C, and 90 °C, the optimal removal efficiencies recorded were 81.78%, 82.29%, and 83.82% for a Cr(VI) content of 10 mg/L, respectively. Subsequent optimization experiments were conducted with the Box–Behnken Design approach (BBD) in order to emphasise the interactions among the parameters. The adsorption efficiency was used as the response variable in the development of a 2nd–order quadratic equation, and the proposed model's feasibility was assessed using an ANOVA test. Several adsorption isotherm and kinetic models were analysed and the most appropriate model to define the adsorption mechanism and the rate–limiting steps were determined.
{"title":"Using iron–oxide nanoparticles synthesized at varying temperatures to remove Cr(VI): Characterization, adsorption mechanism, and optimization study","authors":"Shreya Ganguly, Sayantan Ganguly","doi":"10.1016/j.surfin.2025.106113","DOIUrl":"10.1016/j.surfin.2025.106113","url":null,"abstract":"<div><div>Hexavalent Chromium [Cr(VI)] is a toxic heavy metal and a notable health hazard. Thus, proper remediation method must be employed for its removal from contaminated water. Iron–oxide nanoparticles have been employed multiple times as an adsorbent for the removal of Cr(VI); however, the adsorption capacity obtained was not sufficiently high.Therefore, this study attempts to synthesize iron–oxide nanoparticles at different temperatures of 25̊ °C, 60̊ °C, and 90̊ °C, respectively and improve both its adsorption efficiency and capacity substantially. Firstly, the iron–oxide nanoparticles were synthesized by the co–precipitation method and investigations on the surface morphologies, sizes, chemical compositions and magnetic properties were carried out by several characterization methods. Next, iron–oxide nanoparticles were used as adsorbents in batch equilibrium studies to effectively remove Cr(VI). A number of parameters, including dosage and contact time, were examined in order to determine how they affected the adsorption process. Using the iron–oxide nanoparticles synthesised at 25 °C (room temperature), 60 °C, and 90 °C, the optimal removal efficiencies recorded were 81.78%, 82.29%, and 83.82% for a Cr(VI) content of 10 mg/L, respectively. Subsequent optimization experiments were conducted with the Box–Behnken Design approach (BBD) in order to emphasise the interactions among the parameters. The adsorption efficiency was used as the response variable in the development of a 2<sup>nd</sup>–order quadratic equation, and the proposed model's feasibility was assessed using an ANOVA test. Several adsorption isotherm and kinetic models were analysed and the most appropriate model to define the adsorption mechanism and the rate–limiting steps were determined.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106113"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526602","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}
Pub Date : 2025-02-25DOI: 10.1016/j.surfin.2025.106108
Chun-Chieh Huang , Min-Hsuan Lee
During the COVID-19 pandemic, the pollution of non-biodegradable medical face masks has caused long-term adverse effects on the marine environment (e.g., rivers, lakes, and oceans) and wildlife health. Converting these face mask wastes into value-added products is crucial in building a low-carbon society. Besides, dry and flexible electrodes are attractive for long-term electrocardiography (ECG) monitoring applications (e.g., early detection of cardiovascular disorders) due to their skin comfort, biocompatibility, and conductive gel-free operation. The study proposes a cost-effective, green, and facile approach for reusing pure polypropylene (PP) plastic substrate from a disposable mask. The PP was coated with poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate (PEDOT:PSS)-based composite solution, resulting in a mechanically flexible composite with high electrical conductivity for real-time biopotential monitoring applications. The PP-based ECG electrode demonstrates impressive electrical performance, reaching a surface resistance of 2.2 Ω/sq, indicating its strong potential for continuous and constant ECG signal detection. Furthermore, the PP-based ECG electrodes' surface properties and chemical compositions were characterized using SEM, EDX, and FTIR. This intelligent strategy provides a feasible idea for simultaneously addressing the critical challenges in human society, e.g., medical plastic wastes and health monitoring devices, which could support the Sustainable Development Goals (e.g., good health and well-being and life below water).
{"title":"Flexible dry electrocardiography electrodes obtained from waste face masks, PEDOT:PSS, and biosynthetic polymers","authors":"Chun-Chieh Huang , Min-Hsuan Lee","doi":"10.1016/j.surfin.2025.106108","DOIUrl":"10.1016/j.surfin.2025.106108","url":null,"abstract":"<div><div>During the COVID-19 pandemic, the pollution of non-biodegradable medical face masks has caused long-term adverse effects on the marine environment (e.g., rivers, lakes, and oceans) and wildlife health. Converting these face mask wastes into value-added products is crucial in building a low-carbon society. Besides, dry and flexible electrodes are attractive for long-term electrocardiography (ECG) monitoring applications (e.g., early detection of cardiovascular disorders) due to their skin comfort, biocompatibility, and conductive gel-free operation. The study proposes a cost-effective, green, and facile approach for reusing pure polypropylene (PP) plastic substrate from a disposable mask. The PP was coated with poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate (PEDOT:PSS)-based composite solution, resulting in a mechanically flexible composite with high electrical conductivity for real-time biopotential monitoring applications. The PP-based ECG electrode demonstrates impressive electrical performance, reaching a surface resistance of 2.2 Ω/sq, indicating its strong potential for continuous and constant ECG signal detection. Furthermore, the PP-based ECG electrodes' surface properties and chemical compositions were characterized using SEM, EDX, and FTIR. This intelligent strategy provides a feasible idea for simultaneously addressing the critical challenges in human society, e.g., medical plastic wastes and health monitoring devices, which could support the Sustainable Development Goals (e.g., good health and well-being and life below water).</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106108"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511667","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}
Pub Date : 2025-02-25DOI: 10.1016/j.surfin.2025.106112
Jagannath Panda , Sugato Hajra , Swati Panda , Young Je Kwon , Kushal Ruthvik Kaja , Ho Jin Jung , Gyeong Min Choi , Hoe Joon Kim , Kie Yong Cho
Measuring pH is crucial across various domains, including environmental science, healthcare, and food packaging. While conventional pH sensors are highly sensitive, they are often limited by challenges such as limited battery life and slower response rates. An innovative solution lies in triboelectric nanogenerator (TENG) technology, which offers a sustainable, battery-free approach to pH detection. By harnessing mechanical energy and converting it into electrical energy, TENGs enable the development of self-powered sensors suitable for environmental applications. In this context, A nitrogen-rich polymer organic framework (POF) was synthesized based on porphine using pyrrole and tested its effectiveness in a TENG. The POF particles are used as the positive triboelectric layer and FEP as the negative triboelectric layer in the TENG fabrication process. The resulting POF-based TENG could generate 70 V voltage, 1.2 µA of current, and 5 µW of power. We also demonstrated that the TENG could charge capacitors and power LEDs. The study explored the operational mechanism of the TENG in harsh environmental conditions and how the POF material detects pH changes, confirming its efficiency in pH sensing. The research highlights the synthesis of the POF material, its use as a triboelectric layer, the fabrication process of the TENG, and its performance in energy harvesting and self-powered applications.
{"title":"Amine-enriched polymeric organic frameworks for enhanced energy harvesting and self-powered pH sensing performance","authors":"Jagannath Panda , Sugato Hajra , Swati Panda , Young Je Kwon , Kushal Ruthvik Kaja , Ho Jin Jung , Gyeong Min Choi , Hoe Joon Kim , Kie Yong Cho","doi":"10.1016/j.surfin.2025.106112","DOIUrl":"10.1016/j.surfin.2025.106112","url":null,"abstract":"<div><div>Measuring pH is crucial across various domains, including environmental science, healthcare, and food packaging. While conventional pH sensors are highly sensitive, they are often limited by challenges such as limited battery life and slower response rates. An innovative solution lies in triboelectric nanogenerator (TENG) technology, which offers a sustainable, battery-free approach to pH detection. By harnessing mechanical energy and converting it into electrical energy, TENGs enable the development of self-powered sensors suitable for environmental applications. In this context, A nitrogen-rich polymer organic framework (POF) was synthesized based on porphine using pyrrole and tested its effectiveness in a TENG. The POF particles are used as the positive triboelectric layer and FEP as the negative triboelectric layer in the TENG fabrication process. The resulting POF-based TENG could generate 70 V voltage, 1.2 µA of current, and 5 µW of power. We also demonstrated that the TENG could charge capacitors and power LEDs. The study explored the operational mechanism of the TENG in harsh environmental conditions and how the POF material detects pH changes, confirming its efficiency in pH sensing. The research highlights the synthesis of the POF material, its use as a triboelectric layer, the fabrication process of the TENG, and its performance in energy harvesting and self-powered applications.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106112"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520921","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}
Pub Date : 2025-02-25DOI: 10.1016/j.surfin.2025.106117
Yunxiu Lian, Wei Dong, Fumin Xu
Metallic phase-change materials (PCMs) offer significant benefits, including a latent heat of phase change and dense heat storage capacity, and have broad application prospects in recovery and utilization of various high-temperature industrial waste heats. However, the application of metallic PCMs is considerably restricted due to leakage and corrosion issues during high-temperature phase transition. In this study, high-quality mono-sized Al–Si particles with excellent spherical shapes and narrow size distributions were prepared by pulsated orifice ejection method (POEM) in different cooling gas atmospheres. After high-temperature thermal oxidation, an Al2O3 shell layer formed around the particles, enabling the self-encapsulation of the metallic core. The results showed that the particles prepared in argon and helium gas exhibited thermal energy storage densities of 403.81 J/g and 429.02 J/g, respectively, while their thermal energy release densities were 408.57 J/g and 428.19 J/g. After 100 thermal cycles, the Al2O3 shell proved effective in preserving the core-shell structure, demonstrating excellent thermal stability and oxidation resistance throughout the thermal cycling process.
{"title":"Mono-sized Al–Si alloy particles with identical thermal history for energy storage application fabricated via the pulsated orifice ejection method","authors":"Yunxiu Lian, Wei Dong, Fumin Xu","doi":"10.1016/j.surfin.2025.106117","DOIUrl":"10.1016/j.surfin.2025.106117","url":null,"abstract":"<div><div>Metallic phase-change materials (PCMs) offer significant benefits, including a latent heat of phase change and dense heat storage capacity, and have broad application prospects in recovery and utilization of various high-temperature industrial waste heats. However, the application of metallic PCMs is considerably restricted due to leakage and corrosion issues during high-temperature phase transition. In this study, high-quality mono-sized Al–Si particles with excellent spherical shapes and narrow size distributions were prepared by pulsated orifice ejection method (POEM) in different cooling gas atmospheres. After high-temperature thermal oxidation, an Al<sub>2</sub>O<sub>3</sub> shell layer formed around the particles, enabling the self-encapsulation of the metallic core. The results showed that the particles prepared in argon and helium gas exhibited thermal energy storage densities of 403.81 J/g and 429.02 J/g, respectively, while their thermal energy release densities were 408.57 J/g and 428.19 J/g. After 100 thermal cycles, the Al<sub>2</sub>O<sub>3</sub> shell proved effective in preserving the core-shell structure, demonstrating excellent thermal stability and oxidation resistance throughout the thermal cycling process.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106117"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511671","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}
Pub Date : 2025-02-25DOI: 10.1016/j.surfin.2025.106114
Yong-Bo Peng , Guo-Xing Zhou , Rong-Yan Zhang , Lei Wang , Ying-Zhao Ma , Guo Peng , Xiao-Ming Ren
Despite cocrystal strategy is an effective method for preparing room-temperature phosphorescence (RTP) materials, chiral cocrystals with high phosphorescent quantum yields and large asymmetry factors are still limited. Herein, three pairs of chiral cocrystals, namely R/S-IPA, R/S-TPA and R/S-PMA, were prepared by the assembly of IPA / TPA / PMA (IPA = isophthalic acid, TPA = terephthalic acid, PMA = pyromellitic acid) with R/S-THNA (R/S-THNA = R/S-1,2,3,4-tetrahydro-1-naphthylamine). All the cocrystals crystallize in the chiral space group and the IPA / TPA / PMA and THNA molecules are connected to each other by hydrogen bonds and π···π or / and CH···π interactions. Their chiral nature was further confirmed by second harmonic generation (SHG) measurements and R/S-IPA show strong SHG response of about 1.91 / 1.88 times that of KDP. All the compounds exhibit afterglow when the UV lamp was turned off and their lifetimes vary from 479.5 ms to 36.1 ms. The phosphorescent quantum yield of R-PMA is up to 30.5 %, which is higher than that of most cocrystals with RTP. Both circularly polarized luminescence (CPL) and circularly polarized phosphorescence (CPP) were observed in the CPL spectra of all the compounds and their luminescence asymmetry factors (glum) reach the order of 10–2. Based on the different afterglow lifetimes of these products, anticounterfeiting and information encryption were realized. Transparent thin films of the cocrystals were prepared by blending them with polyvinyl alcohol (PVA) and their flexibility and workability were assessed by processing them into different shapes.
{"title":"Chiral cocrystals with circularly polarized persistent phosphorescence and large second harmonic generation","authors":"Yong-Bo Peng , Guo-Xing Zhou , Rong-Yan Zhang , Lei Wang , Ying-Zhao Ma , Guo Peng , Xiao-Ming Ren","doi":"10.1016/j.surfin.2025.106114","DOIUrl":"10.1016/j.surfin.2025.106114","url":null,"abstract":"<div><div>Despite cocrystal strategy is an effective method for preparing room-temperature phosphorescence (RTP) materials, chiral cocrystals with high phosphorescent quantum yields and large asymmetry factors are still limited. Herein, three pairs of chiral cocrystals, namely <strong>R/S-IPA, R/S-TPA</strong> and <strong>R/S-PMA</strong>, were prepared by the assembly of IPA / TPA / PMA (IPA = isophthalic acid, TPA = terephthalic acid, PMA = pyromellitic acid) with R/S-THNA (R/S-THNA = <em>R</em>/S-1,2,3,4-tetrahydro-1-naphthylamine). All the cocrystals crystallize in the chiral space group and the IPA / TPA / PMA and THNA molecules are connected to each other by hydrogen bonds and π···π or / and C<img>H···π interactions. Their chiral nature was further confirmed by second harmonic generation (SHG) measurements and <strong>R/S-IPA</strong> show strong SHG response of about 1.91 / 1.88 times that of KDP. All the compounds exhibit afterglow when the UV lamp was turned off and their lifetimes vary from 479.5 ms to 36.1 ms. The phosphorescent quantum yield of <strong>R-PMA</strong> is up to 30.5 %, which is higher than that of most cocrystals with RTP. Both circularly polarized luminescence (CPL) and circularly polarized phosphorescence (CPP) were observed in the CPL spectra of all the compounds and their luminescence asymmetry factors (g<sub>lum</sub>) reach the order of 10<sup>–2</sup>. Based on the different afterglow lifetimes of these products, anticounterfeiting and information encryption were realized. Transparent thin films of the cocrystals were prepared by blending them with polyvinyl alcohol (PVA) and their flexibility and workability were assessed by processing them into different shapes.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106114"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520934","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号