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Crystal Facet Effect in Chiral PdPt3 Hollow Nanocages as Nanozymes for Use in Enantiomer Recognition
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-28 DOI: 10.1021/acs.langmuir.5c00223
Liying Zong, Xiaoqiao Yang, Xiaohuan Sun, Zheng Xi, Jie Han
{"title":"Crystal Facet Effect in Chiral PdPt3 Hollow Nanocages as Nanozymes for Use in Enantiomer Recognition","authors":"Liying Zong, Xiaoqiao Yang, Xiaohuan Sun, Zheng Xi, Jie Han","doi":"10.1021/acs.langmuir.5c00223","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00223","url":null,"abstract":"Understanding the crystal facet effect in chiral enantiomer recognition plays an important role in designing and fabricating chiral nanozymes for biosensing and biodetection applications. Herein, we design an ideal platform to study the crystal facet effect in chiral enantiomer recognition using cubic and icosahedral PdPt<sub>3</sub> hollow nanocages (NCs) as peroxidase mimics via surface ligand decoration of <span>l</span>/<span>d</span>-cysteine (<span>l</span>/<span>d</span>-Cys). The two PdPt<sub>3</sub> NCs have the same structure of surface ligand, particle size, wall thickness, surface area, and elemental composition, with the only difference of exposed crystal facets, i.e., {100} for cubic PdPt<sub>3</sub> NC-<span>l</span>/<span>d</span>-Cys and {111} for icosahedral PdPt<sub>3</sub> NC-<span>l</span>/<span>d</span>-Cys. The cubic PdPt<sub>3</sub> {100} facet demonstrates 2.2-fold higher peroxidase-like catalytic activity than the icosahedral PdPt<sub>3</sub> {111} facet, which also leads to the better enantiomer recognition performance of discerning 3,4-dihydroxy-<span>l</span>/<span>d</span>-phenylalanine. Our work provides the concept of crystal facet tuning for designing chiral nanozymes with high stereoselective properties.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"33 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723687","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}
引用次数: 0
Hydrophilic–Lipophilic Balance (HLB) Correlation Method for the Selection of Ionic Liquid Surfactant Modifiers of the Viscosity and Emulsion Stability of Heavy Oils
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-28 DOI: 10.1021/acs.langmuir.4c05309
Alma Delia Miranda-Olvera, José-Manuel Domínguez-Esquivel, Jesus Martinez
{"title":"Hydrophilic–Lipophilic Balance (HLB) Correlation Method for the Selection of Ionic Liquid Surfactant Modifiers of the Viscosity and Emulsion Stability of Heavy Oils","authors":"Alma Delia Miranda-Olvera, José-Manuel Domínguez-Esquivel, Jesus Martinez","doi":"10.1021/acs.langmuir.4c05309","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05309","url":null,"abstract":"The compatibility of heavy crude oils with ionic liquids (ILs) acting as surfactants was investigated through the hydrophilic–lipophilic balance (HLB) analysis, using independent methods for determining HLB's range of each species, including the partition function (<i>K</i><sub>HL</sub>), SARA analysis, and the Hildebrand′s solubility parameter (δ) that were used for hydrocarbons, while the main parameters for ILs comprised the solubility parameter (δ) determined by the Davies and Lin's method, which was validated through experimental calorimetric differential scanning calorimetry (DSC) measurements. Additionally, a correlation was sought between HLB values of petroleum-heavy oils and their physical properties such as viscosity (μ) and interfacial tension (σ), from which the emulsion trends and rheological correlations were explored in a series of high-viscosity heavy crude oils whose API gravity values ranged from 9 to 13°. Their affinity with ILs was explored by the convergence of those parameters, that is, HLB, δ (Hildebrand), and IFT into a spherical locus, which gives the leading pairs of heavy oils and ILs that match together into the spherical space that defines affinity which effects interfacial tension and viscosity reduction of the heavy oils. Essentially, this method gives a systematic approach for selecting the optimal affinity between pairs of heavy oils and the chemical leads (ILs) that improve the mobility of the heavy oils and their wettability patterns. Conversely, the dispersion of points outside the Interaction Sphere defined by the HLB/δ (Hildebrand)/IFT spherical locus leads to partial emulsions and lower effects on the rheological properties of the heavy oils.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"25 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723686","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}
引用次数: 0
Decorating Natural Silk Nanofiber Aerogel with a Hierarchical Structure via TiO2 for Improved UV Protection and Radiation Cooling
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-28 DOI: 10.1021/acs.langmuir.5c00717
Huiyu Yang, Rong Chen, Guowen Yu, Xiaohua Cheng, Liangang Zhao, Hai Liu, Bo Deng, Zushun Xu, Chunli Gong
{"title":"Decorating Natural Silk Nanofiber Aerogel with a Hierarchical Structure via TiO2 for Improved UV Protection and Radiation Cooling","authors":"Huiyu Yang, Rong Chen, Guowen Yu, Xiaohua Cheng, Liangang Zhao, Hai Liu, Bo Deng, Zushun Xu, Chunli Gong","doi":"10.1021/acs.langmuir.5c00717","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00717","url":null,"abstract":"Daytime radiant cooling achieves a sustainable cooling effect by reflecting sunlight and radiant heat. However, absorption of sunlight by emitters and parasitic heat gain can significantly reduce radiative cooling temperatures. To improve the light reflectivity and emissivity in the mid-infrared band, SNF@TiO<sub>2</sub> aerogel with high stability and efficient radiative cooling effect was constructed using nanosilk and titanium dioxide. The hierarchical structure of the aerogel stores more air, which reduces the thermal conductivity (0.0333 W·m<sup>–1</sup>·K<sup>–1</sup>) and parasitic heat gain. TiO<sub>2</sub> provides excellent UV resistance while increasing solar reflectance and atmospheric window emissivity. The average solar reflectance and average IR emissivity of SNF@TiO<sub>2</sub> were 89.4 and 92.3%, respectively. Compared with the subambient (<i>I</i>: 800 W·m<sup>–2</sup>, PE-covered air) temperature, the average cooling temperature of SNF@TiO<sub>2</sub> under direct sunlight reached 11.5 °C. Meanwhile, the outdoor subambient (<i>I</i>: 900 W·m<sup>–2</sup>, PE-covered air) average temperature drop of SNF@TiO<sub>2</sub> reached 12.1 °C after UV (40 mW·cm<sup>–2</sup>) continuous radiation for 10 days (6 h per day), displaying highly stable radiative cooling properties. In addition, the SNF@TiO<sub>2</sub> aerogel has good mechanical elasticity and thermal insulation properties. This study offers great potential for silk fiber materials for outdoor radiant heat management.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"35 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723690","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}
引用次数: 0
Assembling Xanthan Gum at the Air–Water Interface and Disentangling It with Ionic Liquids
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-28 DOI: 10.1021/acs.langmuir.4c04743
Nancy Jaglan, Gunjan Sharma, Prashant Hitaishi, Rajendra P. Giri, Nicolas Hayen, Bridget M. Murphy, Sajal K. Ghosh
{"title":"Assembling Xanthan Gum at the Air–Water Interface and Disentangling It with Ionic Liquids","authors":"Nancy Jaglan, Gunjan Sharma, Prashant Hitaishi, Rajendra P. Giri, Nicolas Hayen, Bridget M. Murphy, Sajal K. Ghosh","doi":"10.1021/acs.langmuir.4c04743","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c04743","url":null,"abstract":"Xanthan gum is a biopolymer used in a wide range of products in the food and cosmetic industries. As ionic liquids (ILs) have emerged as antimicrobial molecules, they can be used as preservatives for this polymer. Hence, it is important to understand the interaction of ionic liquids with Xanthan gum. In this investigation, polymer self-assembly at the air–water interface has been studied in the presence of ionic liquids floating at the air–water interface. From the surface pressure–area isotherm, it is shown that the electrostatic interaction drives the polymer to the interface, resulting in a viscoelastic film. In-plane dilation rheology has determined the storage and loss moduli of the film, which are found to depend on the concentration of the polymer dissolved in the water subphase. Additionally, a synchrotron-based X-ray reflectivity study has produced the electron density profile across the interface, depicting the structure of the film and suggesting that the negatively charged side groups of Xanthan gum attach to the positively charged headgroup of ionic liquids. This assembly drives the polymer to disentangle, which has been further verified in an aqueous solution of the polymer showing a non-newtonian shear-thinning behavior. The storage and loss moduli curves show two crossover frequencies, manifesting an elastic plateau width that decreases in the presence of IL in the solution. This, in turn, is a signature of the disentangling effect of the IL.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"36 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723684","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}
引用次数: 0
Main-Group p-Block Metal-Doped C3N Monolayers as Efficient Electrocatalysts for NO-to-NH3 Conversion: A Computational Study
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-28 DOI: 10.1021/acs.langmuir.5c00442
Yumeng Yang, Chen Sun, Zhiwen Zhuo, Lei Wang, Weiyi Wang, Aidang Lu, Jiajun Wang
{"title":"Main-Group p-Block Metal-Doped C3N Monolayers as Efficient Electrocatalysts for NO-to-NH3 Conversion: A Computational Study","authors":"Yumeng Yang, Chen Sun, Zhiwen Zhuo, Lei Wang, Weiyi Wang, Aidang Lu, Jiajun Wang","doi":"10.1021/acs.langmuir.5c00442","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00442","url":null,"abstract":"The electrochemical NO reduction reaction (NORR) toward NH<sub>3</sub> synthesis not only helps address issues of air pollution but also holds significant energy and economic value, making it an innovative method with broad application prospects. However, designing NORR electrocatalysts that are both highly active and selective remains a formidable challenge. Herein, we study the main-group p-block metal (M = Al, Ga, and In)-doped C<sub>3</sub>N monolayers as promising single-atom catalysts (SACs) for NORR through spin-polarized first-principles calculations. Our results show that Al@V<sub>CC</sub>, Al@V<sub>CN</sub>, Ga@V<sub>CC</sub>, and Ga@V<sub>CN</sub> systems are not only stable but also exhibit metallic characteristics, ensuring effective charge transfer during the NORR process. Moreover, nitric oxide (NO) can be strongly chemisorbed and activated on all four candidates with adsorption free energies ranging from −0.83 to −1.59 eV and then spontaneously converted into NH<sub>3</sub> without the need for any applied voltage. More importantly, Ga@V<sub>CN</sub> possesses a well-suppressed ability for the formation of H<sub>2</sub>/N<sub>2</sub>O/N<sub>2</sub> byproducts, indicating excellent NH<sub>3</sub> selectivity. These findings not only offer a promising electrocatalyst for the NO-to-NH<sub>3</sub> conversion but also highlight the great potential of main-group metals as SACs for electrochemical reactions.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"30 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723688","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}
引用次数: 0
Dynamic Electrodes Enhanced Electrocatalytic Hydrogen Evolution Performance of Two-Dimensional Materials
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-28 DOI: 10.1021/acs.langmuir.4c05223
Ningning Xuan, Ningning Huang, Chunhui Song, Xinlei Du, Pengxu Chang, Junmeng Guo, Gang Cheng
{"title":"Dynamic Electrodes Enhanced Electrocatalytic Hydrogen Evolution Performance of Two-Dimensional Materials","authors":"Ningning Xuan, Ningning Huang, Chunhui Song, Xinlei Du, Pengxu Chang, Junmeng Guo, Gang Cheng","doi":"10.1021/acs.langmuir.4c05223","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05223","url":null,"abstract":"Hydrogen energy, known for its elevated combustion enthalpy and the generation of clean water upon combustion, represents a clean energy source with valuable potential applications. Water electrolysis for hydrogen production has emerged as an effective and environmentally friendly green hydrogen synthesis methodology. However, the conventional process of water electrolysis is typically performed under constant current or constant potential conditions, resulting in less-than-ideal hydrogen production rates due to limitations in mass transport. The adjustment of the catalyst interface and enhancement of mass transfer are achievable with dynamic electrodes. Herein, the electrocatalytic hydrogen evolution performance using MoS<sub>2</sub> as a model catalyst with dynamic electrodes was investigated. The electrocatalytic hydrogen evolution performance of MoS<sub>2</sub> can be enhanced by using dynamic electrodes, achieving a maximum increase of 240% in the hydrogen production rate. Improved electrocatalytic performance for hydrogen evolution can be observed when employing other two-dimensional materials as dynamic electrodes, including Pt-MoS<sub>2</sub> and Mo<sub>2</sub>C. Pt-MoS<sub>2</sub> demonstrates the most significant enhancement in the hydrogen evolution rate (400% enhancement). Through mechanistic analysis, the essence of enhancing electrocatalytic performance for hydrogen evolution lies in the bubbles effective separation and varied electrochemical double layer to facilitate mass transport. This work provides an effective method for enhancing the water electrolysis activity using the dynamic electrode.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"59 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723685","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}
引用次数: 0
Preparation of Large-Area Anodic Oxide Films with Regularly Arranged Pores by Two-Step Anodization of Stainless Steel Substrates and Application to Superhydrophobic and Superoleophobic Surfaces
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-28 DOI: 10.1021/acs.langmuir.5c00638
Sayaka Teshima, Takashi Yanagishita
{"title":"Preparation of Large-Area Anodic Oxide Films with Regularly Arranged Pores by Two-Step Anodization of Stainless Steel Substrates and Application to Superhydrophobic and Superoleophobic Surfaces","authors":"Sayaka Teshima, Takashi Yanagishita","doi":"10.1021/acs.langmuir.5c00638","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00638","url":null,"abstract":"An anodic oxide film with regularly arranged pores was obtained by two-step anodization of a stainless-steel (SS) substrate in ethylene glycol containing NH<sub>4</sub>F. The effect of the electrolyte composition on the pore arrangement was investigated to prepare large-area anodic oxide films with regularly arranged pores. It was found that the concentrations of H<sub>2</sub>O and NH<sub>4</sub>F in the electrolyte significantly affected the pore arrangement. It was also confirmed that the degradation of the electrolytes affected the pore arrangement. To form a large-area anodic oxide film with regularly arranged pores, it is essential to use a sufficient amount of an electrolyte with an appropriate composition to minimize the effect of electrolyte degradation. An ordered anodic oxide film with a size of 50 mm × 50 mm was obtained using two-step anodization of the SS substrate under optimized conditions. It was also shown that a surface with hierarchical nanomicrostructures could be fabricated when two-step anodization was performed on an SS substrate with microstructures. When the obtained sample was treated with fluoroalkyl silane, it acted as a superhydrophobic and superoleophobic surface. Large-area anodic oxide films with regularly arranged pores can be utilized in various applications, including capacitors, water-splitting devices, solar cells, and surfaces with highly controlled wettability.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"183 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723689","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}
引用次数: 0
Strategy to Develop Multifunctional Hydrogel Coatings with High Durability
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-27 DOI: 10.1021/acs.langmuir.5c00773
Shulu Wang, Shuaibing Wang, Mengjie Si, Si Yu Zheng, Jintao Yang
{"title":"Strategy to Develop Multifunctional Hydrogel Coatings with High Durability","authors":"Shulu Wang, Shuaibing Wang, Mengjie Si, Si Yu Zheng, Jintao Yang","doi":"10.1021/acs.langmuir.5c00773","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00773","url":null,"abstract":"Hydrophilic gel coatings have emerged as a promising strategy for surface modification and functionalization of biomedical devices. Nevertheless, most existing coatings suffer from significant limitations, such as low adhesion strength to substrates, fragility, and a complex preparation process involved with toxic solvents. Herein, to overcome these issues simultaneously, we proposed a simple method to fabricate a hydrogel coating based on tetraethyl orthosilicate (TEOS) and a copolymer with poly(2-hydroxyethyl methacrylate) segments. The solution of TEOS and the copolymer can be applied to substrate surfaces through various techniques, including drop coating, dip coating, brush coating, and so on. Covalent bonds formed in situ through the condensation reaction occurred between silanol (originated from TEOS) and hydroxyl groups (on the polymer and the plasma-treated substrate), ensuring the robust adhesion and durability of the coating. Notably, by copolymerizing with certain monomers, customized functions could be realized, underscoring the significant practical value of the strategy.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"23 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723787","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}
引用次数: 0
Microalgae-Derived Microparticles Improve Immunomodulation via Combined Glycolysis and MAPK Activation
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-27 DOI: 10.1021/acs.langmuir.4c05088
Saetbyeol Jeon, Hwira Baek, Seulgi Kim, Youngseok Kim, Junoh Kim, Jin Woong Kim
{"title":"Microalgae-Derived Microparticles Improve Immunomodulation via Combined Glycolysis and MAPK Activation","authors":"Saetbyeol Jeon, Hwira Baek, Seulgi Kim, Youngseok Kim, Junoh Kim, Jin Woong Kim","doi":"10.1021/acs.langmuir.4c05088","DOIUrl":"https://doi.org/10.1021/acs.langmuir.4c05088","url":null,"abstract":"Natural polysaccharides possess potent immunostimulatory properties, but their poor solubility impedes efficiency of cellular delivery. This study focuses on extraction of microparticles (MPs) from<i>Euglena gracilis</i>, a microalgae species characterized by abundant intracellular β-1,3-glucan and flexible cell membrane. We introduce an<i>E. gracilis</i>-derived MP (MP<sub>EG</sub>) system as a natural carrier for solubilized β-glucan. The MP<sub>EG</sub> system enhances β-glucan’s solubility and loading efficiency through sequential sonication and cell extrusion. <i>In vitro</i> studies reveal that MP<sub>EG</sub> utilizes multiple endocytosis pathways, including phagocytosis, clathrin-mediated, and lipid raft-mediated routes, for effective β-glucan delivery into cells. Upon cellular internalization, MP<sub>EG</sub> components trigger dual activation of the MAPK signaling pathway and glycolysis in macrophages, leading to enhanced production of pro-inflammatory cytokines and lactic acid, ultimately strengthening innate immune responses. This MP<sub>EG</sub> system offers a promising approach to harnessing the immunostimulatory properties of natural polysaccharides while overcoming their solubility limitations, opening new avenues for targeted cellular delivery in immunomodulation therapies.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"50 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713558","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}
引用次数: 0
Tailoring Morphology and Wetting Behavior of Films of Ionic Liquid Mixtures
IF 3.9 2区 化学
Langmuir Pub Date : 2025-03-27 DOI: 10.1021/acs.langmuir.5c00653
Soraia R. M. R. Silva, Rita M. Carvalho, Oleksandr Bondarchuk, Gonçalo N. P. Oliveira, João P. Araújo, Margarida Bastos, Luís M. N. B. F. Santos, José C. S. Costa
{"title":"Tailoring Morphology and Wetting Behavior of Films of Ionic Liquid Mixtures","authors":"Soraia R. M. R. Silva, Rita M. Carvalho, Oleksandr Bondarchuk, Gonçalo N. P. Oliveira, João P. Araújo, Margarida Bastos, Luís M. N. B. F. Santos, José C. S. Costa","doi":"10.1021/acs.langmuir.5c00653","DOIUrl":"https://doi.org/10.1021/acs.langmuir.5c00653","url":null,"abstract":"Extensive research has focused on films formed by pure ionic liquids (ILs). However, growing interest in IL mixtures and their synergistic properties presents new opportunities for targeted applications and fundamental scientific investigations. This study explores the morphology of films composed of mixtures of two ILs, [C<sub>2</sub>C<sub>1</sub>im][OTf] and [C<sub>8</sub>C<sub>1</sub>im][OTf], co-deposited via physical vapor deposition (PVD)/vacuum thermal evaporation. The primary objective was understanding how varying the IL ratio influences droplet formation, surface coverage, and overall film structure. Thin-film growth was examined on glass substrates coated with indium tin oxide (ITO) and ITO/glass surfaces coated with metallic films (Au and Ag). Film morphology was characterized using optical and high-resolution scanning electron microscopy (SEM), while elemental composition was analyzed via X-ray photoelectron spectroscopy (XPS). The results show that IL mixture morphology is strongly influenced by both IL composition and substrate type. Increasing [C<sub>8</sub>C<sub>1</sub>im][OTf] content led to larger microstructures due to improved wetting, particularly on Au surfaces, resulting in nearly fully coalesced films. Metallic surfaces near ITO significantly impacted droplet behavior, with ILs exhibiting a strong affinity for metals, especially when the long-chain IL dominated the mixture. The IL-assisted crystallization of rubrene, a high-performance organic semiconductor (OSC) that typically exhibits poor crystallinity when deposited via PVD, highlights the potential of IL mixtures to enhance organic film quality. X-ray diffraction (XRD) confirmed that [C<sub>2</sub>C<sub>1</sub>im][OTf] and [C<sub>8</sub>C<sub>1</sub>im][OTf] mixtures significantly improved rubrene crystallinity, demonstrating their potential to create an optimal environment for OSC solubility and crystallization.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"212 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713611","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}
引用次数: 0
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