Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

{"title":"SERS substrates based on flexible and transparent PDMS supports with periodic hierarchical structure for in-situ detection of pesticide residues","authors":"Mengqi He,&nbsp;Hao Wu,&nbsp;Xin Cai,&nbsp;Shuangyun Li,&nbsp;Shiting Cao,&nbsp;Xiaofang Zhao,&nbsp;Meifeng Xu,&nbsp;Chaonan Wang","doi":"10.1016/j.colsurfa.2024.135815","DOIUrl":"10.1016/j.colsurfa.2024.135815","url":null,"abstract":"<div><div>In this work, hierarchical structure composed of periodic nanopillars and wrinkles was designed on flexible and transparent PDMS through a strategy combining template method and oxygen plasma treatment. Investigations on the SERS performance of the substrates obtained after Ag thermal deposition reveal both the nanopillars and the wrinkles contributed greatly to the enhancement. The formation of the periodic wrinkles followed the buckling theory. Under the condition of 30 % deformation and 40 W plasma power, by adjusting the deposition time to 30 min, dense distribution of Ag NPs on the hierarchical PDMS support was achieved while avoiding coverage of the nano wrinkles. The obtained substrate named Ag-30/PDMS-PW had an EF of 3.11×10⁷, excellent uniformity and outstanding reproducibility with an RSD of 2.13 % and 4.9 % respectively. Cyclic loading and tensile tests verify the mechanical stability and perfect elasticity of the Ag-30/PDMS-PW substrate. Coupled with the bi-direction excitation ability, the as-prepared substrate was fully qualified for in-situ detection of pesticide residues, which was demonstrated by the in-situ detection of thiram and thiabendazole on apple surface with concentrations lower than the maximum residue limits. The results manifest the proposed substrate has great potential for in-situ food safety monitoring in real-world applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"707 ","pages":"Article 135815"},"PeriodicalIF":4.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fully biodegradable piezoelectric nanogenerator based on cellulose/PLLA electrospun fibers with high-performance for mechanical energy harvesting","authors":"Li Xu ,&nbsp;Quan kun Zhang ,&nbsp;Zhenglong Hu ,&nbsp;Chunbo Hua ,&nbsp;Li Xue ,&nbsp;Pengfei Lu ,&nbsp;Fan Zhang ,&nbsp;Yanchao Zhang ,&nbsp;Juan Xiong","doi":"10.1016/j.colsurfa.2024.135813","DOIUrl":"10.1016/j.colsurfa.2024.135813","url":null,"abstract":"<div><div>Research efforts are intensifying to employ fully biodegradable piezoelectric nanogenerators (PENGs) as self-powered medical implanted devices and health monitoring products. Poly(L-lactic acid) (PLLA) shows significant promise for biological applications owing to its natural biodegradability, particularly when fabricated as nanofibrous structures via electrospinning. However, PLLA faces inherent limitations related to its relatively weak piezoelectric properties, specifically characterized by a low shear piezoelectric coefficient (d₁₄), which is the familiar form. In this study, a fully biodegradable PLLA nanofiber incorporated with cellulose was applied as piezoelectric film by electrospinning approach. Cellulose/PLLA film exhibits remarkable enhancements in piezoelectric performance, showcasing a 1.6-fold increase in the longitudinal piezoelectric coefficient (d₃₃∼64.2 pm/V) and a substantial boost of nearly 250 % in output voltage. Soil burial experiments conducted over a period of 120 days validate the film's superior biodegradability, with a degradation rate exceeding 93.6 %. Furthermore, the optimized cellulose/PLLA fiber-based PENG demonstrates a maximum open-circuit voltage of 10.3 V and robust mechanical stability, enduring 30,000 cycles without degradation. Notably, the cellulose/PLLA nanofiber-based piezoelectric sensor exhibits efficient detection capabilities, evidenced by distinct output signals in response to varying airflow pressures. Taking into account the advantages of facile fabrication and the utilization of readily available sustainable materials, the proposed cellulose/PLLA device presents a promising eco-conscious alternative for self-powered electronic skin and implantable medical applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135813"},"PeriodicalIF":4.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and evaluation of CO2 responsive surfactants based on dynamic imine bond","authors":"Lipei Fu ,&nbsp;Jing Gong ,&nbsp;Qingling Liu ,&nbsp;Qianli Ma ,&nbsp;Minglu Shao ,&nbsp;Kaili Liao ,&nbsp;Ailian Chang ,&nbsp;Tongyu Zhu ,&nbsp;Zhangkun Ren ,&nbsp;Tao Wang","doi":"10.1016/j.colsurfa.2024.135820","DOIUrl":"10.1016/j.colsurfa.2024.135820","url":null,"abstract":"<div><div>In this work, through mixing alkyl primary amines of C_nH_2n+1NH₂ （n=6, HA; n=12, DA; n=18, ODA） and disodium 4-formylbenzene-1, 3-disulfonate (DFD) at 1:1 mol ratio, three novel dynamic imine surfactants (DFD-HA, DFD-DA and DFD-ODA) were synthesized. The imine bond was verified by infrared spectroscopy (IR) and nuclear magnetic resonance (NMR). After preparing the emulsion, DFD-DA exhibited superior stability among the three surfactants at lower concentrations (&lt; 20 mM). Subsequently, an emulsifier system (DFD-DA/LHSB) with excellent interfacial activity and emulsification stability was obtained by blending DFD-DA with lauramidopropyl hydroxy sulfobetaine (LHSB). The system effectively reduced the interfacial tension to the order of 10⁻² mN/m. At a total concentration of 5 g/L and mole ratio (DFD-DA: LHSB = 1:2), the emulsion could be stable for more than 60 days. Contact angle measurements substantiated the superior wettability inversion capability of the system, facilitating the formation of oil-in-water emulsions more effectively. Furthermore, this system possesses remarkable CO₂ responsiveness. After CO₂ injection, the emulsion can be completely demulsified within 45 s in a broad mole ratio range. Changing the relative content of DFD-DA and LHSB can also dynamically regulate the demulsification rate of emulsion. In contrast to previous imine surfactants, the system can achieve full demulsification under higher pH conditions (about 6.0), thereby significantly enhancing the response efficiency and alleviating the equipment corrosion. This discovery provides a new approach to tackling the problems associated with surfactant flooding and heavy oil demulsification, holding important implications for enhancing oil recovery (EOR).</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135820"},"PeriodicalIF":4.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kaolinite-based Janus nanosheets as effective compatibilizer of PLA/PBAT blend","authors":"Bingrui Yang ,&nbsp;Tengfei Fan ,&nbsp;Yixuan Mao,&nbsp;Jixi Chen,&nbsp;Botuo Zheng,&nbsp;Yu Sheng,&nbsp;Huagui Zhang","doi":"10.1016/j.colsurfa.2024.135814","DOIUrl":"10.1016/j.colsurfa.2024.135814","url":null,"abstract":"<div><div>To address the increasing global plastic pollution while the reducing oil supply, the biodegradable and bio-derived poly(lactic acid) (PLA) has been developed and considered to be the most promising substitute of petroleum-based plastics. However, the severe brittleness of PLA has become the obstacle of its broad application. Blending modification with poly(butylene-adipate-co-terephthalate) (PBAT) has been proved to be an potentially feasible strategy to toughen PLA, but conflicted by the poor compatibility between PLA and PBAT. To tackle the problem, a comb-type clay-based Janus nanosheet of poly(methyl methacrylate- kaolinite- poly(butylene-adipate-co-terephthalate) (PMMA-Kaol-PBAT) was prepared by selectively grafting PMMA and PBAT separately on either sides of kaolinite Janus nanosheets (JNS). PBAT was functionalized with quaternary amine via aminolysis before being cation-exchanged onto the siloxane tetrahedral surface (STS) side of kaolinite nanosheets, while PMMA chains were grafted onto the aluminoxyl octahedral surface (AOS) side after a beforehand surface modification with the silane coupling agent KH-570. Introduced in the PLA/PBAT blend system, the PMMA-Kaol-PBAT was found to enrich at the interface, enhancing the phase compatibility with the phase separation and aggregation inhibited during the film coating and annealing process.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"707 ","pages":"Article 135814"},"PeriodicalIF":4.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a biomimetic polyvinylidene fluoride membrane with a lotus leaf-inspired structure for enhanced oil-water separation","authors":"Md All Amin Newton ,&nbsp;Di Gao ,&nbsp;Binjie Xin ,&nbsp;Yuanshen Zheng ,&nbsp;Hugh Gong","doi":"10.1016/j.colsurfa.2024.135773","DOIUrl":"10.1016/j.colsurfa.2024.135773","url":null,"abstract":"<div><div>Efficient oil-water separation is crucial for environmental protection and industrial wastewater management; however, existing separation membranes often lack durability and suffer efficiency loss over multiple cycles. This study introduces a bio-inspired polyvinylidene fluoride (PVDF) membrane with a hierarchical lotus leaf-like surface, designed to overcome these limitations by enhancing separation efficiency, operational stability, and reusability. A polyvinylidene fluoride/polyvinylpyrrolidone (PVDF/PVP) composite membrane was fabricated as a support, onto which PVDF/silicon dioxide (SiO₂) micro-nanoparticles were electrostatically sprayed to create a micro-nano papillae structure. This was followed by in-situ polymerization of dopamine (DA), forming a polydopamine (PDA) coating that enhances hydrophilicity and underwater oleophobicity. Optimization experiments identified a 20-minute spraying duration as ideal, achieving uniform micro-nanoparticle distribution and maximizing water permeability, with a pure water flux of 14,321 L·m⁻²·h⁻¹. The PDA/M-P/S-20 membrane demonstrated over 99.9 % separation efficiency for various oil-water mixtures and maintained stable performance across 15 cycles with only a 2.1 % flux loss, a significant improvement over conventional membranes, which often experience rapid fouling and efficiency decline. Additionally, the membrane exhibited underwater oil contact angles above 140°, confirming its excellent underwater oleophobicity and self-cleaning capabilities. This research highlights the critical role of biomimetic design and precise structural control in addressing the durability and reusability limitations of existing separation technologies, offering a scalable, sustainable solution for industrial applications in petrochemical processing and wastewater treatment.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135773"},"PeriodicalIF":4.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of base catalyst on the physicochemical properties and surface reactivity of silica nanoparticles","authors":"Tsaone Gosiamemang ,&nbsp;Robert V. Law ,&nbsp;Jerry Y.Y. Heng","doi":"10.1016/j.colsurfa.2024.135783","DOIUrl":"10.1016/j.colsurfa.2024.135783","url":null,"abstract":"<div><div>The surface reactivity of silica particles is a key property that enhances their versatility in various industries. Therefore, it is imperative to investigate the effects of different base catalysts on the surface reactivity of silica nanoparticles. Silica nanoparticles were synthesised using potassium hydroxide (KOH) and sodium hydroxide (NaOH) as strong base catalysts, as well as ammonia (NH₃) and lysine amino acid as weak base catalysts. The particle size was observed to increase with the pH of the reaction mixture. Additionally, X-ray photoelectron spectroscopy (XPS) revealed that the catalyst molecules adsorb onto the particle surface, thereby enhancing their surface reactivity. Sodium and potassium ions were found to significantly improve surface reactivity during silanisation, with KOH- and NaOH-sil-C8 samples exhibiting high silane grafting density (&gt; 2.58 alkyl chains/nm²). These findings indicate that the type of base catalyst plays a crucial role in tailoring the properties and surface reactivity of silica nanoparticles.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"707 ","pages":"Article 135783"},"PeriodicalIF":4.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Substrate viscosity-dependent droplet behavior on slippery surface","authors":"Swithin Hanosh ,&nbsp;Sajan D. George","doi":"10.1016/j.colsurfa.2024.135811","DOIUrl":"10.1016/j.colsurfa.2024.135811","url":null,"abstract":"<div><div>The interaction of droplets with surfaces that exhibit slippery behavior is not only an interesting natural phenomenon but also finds applications in diverse areas. Contrary to the commonly used liquid-infused surface for slippery surface fabrication, in this paper, a slippery surface is made by mixing the two components of polydimethylsiloxane and silicone oil in a ratio of 1:4. The study reveals the viscosity of the silicone oil in the mixture is found to have a profound effect on the suppression of the coffee-ring effect and sliding angle dependent velocity behavior. The droplet impact studies on the fabricated slippery surface illustrate that the viscosity of the silicone oil in the matrix plays an important role in the droplet dynamics on the surface, whether it is oscillation or partial rebound. In addition, the dimension of the droplet splitting during the partial rebound regime can be controlled by varying the Weber number. The present approach of creating slippery surfaces and controlling the droplet dynamics on its surface by varying the viscosity can find a plethora of applications, ranging from open microfluidics to medical devices.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135811"},"PeriodicalIF":4.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifunctional coating for polyester/spandex fabric with phytate salt doped carbon black dispersion","authors":"Xian-Wei Cheng ,&nbsp;Jia-Yi Song ,&nbsp;Zheng-Yi Wang ,&nbsp;Jin-Ping Guan ,&nbsp;Ya-Wei Zhu","doi":"10.1016/j.colsurfa.2024.135809","DOIUrl":"10.1016/j.colsurfa.2024.135809","url":null,"abstract":"<div><div>The development of multifunctional protective polyester/spandex (T/S) fabrics is both interesting and challenging. In this study, a novel intumescent flame-retardant glyceryl phytate ammonium salt (GPA) was synthesized by using phytic acid. Subsequently, the carbon black (CB) dispersions doped with GPA were prepared and utilized to fabricate black and multifunctional T/S fabrics through a facile pad-curing method. The chemical structure of GPA, color characteristics, anti-ultraviolet and antistatic properties, combustion behavior, flame retardancy and mode of action of the coated T/S fabrics were investigated. The dispersed CB/GPA imparted a pure black color and good color fastness to the coated T/S fabrics. The coated T/S fabrics also exhibited significantly enhanced antistatic and anti-ultraviolet performance (UPF above 800) because of the homogeneous CB coating. Additionally, the coated T/S fabrics demonstrated self-extinguishing ability and a reduced damaged length of approximately 7.5 cm without molten droplets, benefiting from the synergistic combination of GPA and CB. The formation of cross-linked char networks in condensed phase and the trapping of combustible radicals in gas phase synergistically enhanced the flame retardancy of coated T/S fabrics. This study offers a facile and novel strategy to increase the multifunctionality of T/S fabrics and expand their potential applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135809"},"PeriodicalIF":4.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of AgVO3/PPy/N@rGO composite sensor for efficient electrochemical monitoring of levofloxacin in human fluids and environmental samples","authors":"Krishnapandi Alagumalai ,&nbsp;Vijayalaxmi Mishra ,&nbsp;Seong-Cheol Kim ,&nbsp;Raja Venkatesan ,&nbsp;Mushtaq Ahmad Ansari","doi":"10.1016/j.colsurfa.2024.135791","DOIUrl":"10.1016/j.colsurfa.2024.135791","url":null,"abstract":"<div><div>In the present work, we developed a low-cost and portable nanocomposite material comprising of silver vanadate/polypyrrole/nitrogen doped reduced graphene oxide (AgVO₃/Ppy/N@rGO) for detection of levofloxacin (LFX) is reported for the first time. The surface morphology of AgVO₃/Ppy/N@rGO was investigated using transmission electron microscopy (TEM). which revealed a distinct rod-like structure for AgVO₃, while the incorporation of Ppy (sphere structure) and N@rGO into the composite resulted in a more complex morphology with well-dispersed rod structures embedded within a matrix of Ppy and N@rGO. This structural modification enhanced the surface area and facilitated better electron transfer, contributing to improved electrochemical performance for LFX sensing. The X-ray crystallography (XRD) patterns of the synthesized AgVO₃/Ppy/N@rGO composites were analyzed to confirm the crystalline structure and phase composition. X-ray photoelectron spectroscopy (XPS) confirmed the presence of key elements (Ag, V, C, N, and O) and demonstrated strong interactions among the components. Under the optimized conditions, AgVO₃/Ppy/N@rGO modified glassy carbon electrode (GCE) was employed to determine LFX using CV and LSV techniques. The developed AgVO₃/Ppy/N@rGO/GCE exhibits robust interfacial interaction and synergistic effect, resulting in an excellent electrocatalytic oxidation response for LFX sensing compared to other electrodes. The AgVO₃/Ppy/N@rGO/GCE displays excellent selectivity even in the presence other co-interferences, and it has two wider linear determination range from 0.5 µmol L⁻¹ - 81.5 µmol L⁻¹ and 96.5 µmol L⁻¹ - 1731.5 µmol L⁻¹ of LFX, with a detection limit (LOD) of 0.0027 µM (S/N=3) and ultra-sensitivity of 240.835 μA μM⁻¹ cm⁻². Moreover, the efficacy of fabricated AgVO₃/Ppy/N@rGO/GCE sensors was examined by analyzing LFX in human fluids and water samples, achieving satisfactory accuracy and recovery. The main advantages of the designed sensor are its simplicity, portability, and affordability.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"706 ","pages":"Article 135791"},"PeriodicalIF":4.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unraveling excitation-dependent fluorescence of nitrogen and sodium co-doped carbon dots for dual detection of Fe3+ and Ag+","authors":"Rachmat Waluyo ,&nbsp;Jessie Manopo ,&nbsp;Isnaeni ,&nbsp;Yudi Darma","doi":"10.1016/j.colsurfa.2024.135810","DOIUrl":"10.1016/j.colsurfa.2024.135810","url":null,"abstract":"<div><div>Carbon dot-based fluorescence sensors show great potential for developing metal ion detectors. This study focuses on developing a nanoprobe for the dual detection of different metal ions by harnessing the excitation-dependent fluorescence (EDFL) behavior of nitrogen and sodium co-doped carbon dots (N:Na-CDs). N:Na-CDs were synthesized using a microwave-assisted hydrothermal technique. The synthesized N:Na-CDs exhibited desirable functional groups containing nitrogen and sodium. Both experimental and computational results demonstrate that the presence of nitrogen and sodium-containing groups can modify N:Na-CDs' electronic and chemical structures, thereby inducing EDFL behavior. Interestingly, the different fluorescence centers of N:Na-CDs as a single nanoprobe can be effectively used for selective and sensitive Fe³⁺ and Ag⁺ detection under 360 and 440 nm excitation wavelengths, respectively. The limit of detection (LOD) of Fe³⁺ and Ag⁺ separately was found as 0.25 and 0.14 <span><math><mrow><mi>μ</mi><mi>M</mi></mrow></math></span> within concentration ranges spanning 1–100 <span><math><mrow><mi>μ</mi><mi>M</mi></mrow></math></span> for Fe³⁺ and 1–200 <span><math><mrow><mi>μ</mi><mi>M</mi></mrow></math></span> for Ag⁺. Finally, the quenching mechanisms of N:Na-CDs due to metal quenchers were elucidated. This study provides insight into understanding the EDFL behavior of N:Na-CDs for effective multimodal sensors in environmental water analysis.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"707 ","pages":"Article 135810"},"PeriodicalIF":4.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}