1
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Wei Y, Ding C, Shi G, Bi H, Li Y, Li H, Liu D, Yang Y, Wang D, Chen S, Wang R, Hayase S, Masuda T, Shen Q. Stronger Coupling of Quantum Dots in Hole Transport Layer Through Intermediate Ligand Exchange to Enhance the Efficiency of PbS Quantum Dot Solar Cells. SMALL METHODS 2024:e2400015. [PMID: 38607951 DOI: 10.1002/smtd.202400015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/18/2024] [Indexed: 04/14/2024]
Abstract
Nowadays, the extensively used lead sulfide (PbS) quantum dot (QD) hole transport layer (HTL) relies on layer-by-layer method to replace long chain oleic acid (OA) ligands with short 1,2-ethanedithiol (EDT) ligands for preparation. However, the inevitable significant volume shrinkage caused by this traditional method will result in undesired cracks and disordered QD arrangement in the film, along with adverse increased defect density and inhomogeneous energy landscape. To solve the problem, a novel method for EDT passivated PbS QD (PbS-EDT) HTL preparation using small-sized benzoic acid (BA) as intermediate ligands is proposed in this work. BA is substituted for OA ligands in solution followed by ligand exchange with EDT layer by layer. With the new method, smoother PbS-EDT films with more ordered and closer QD packing are gained. It is demonstrated stronger coupling between QDs and reduced defects in the QD HTL owing to the intermediate BA ligand exchange. As a result, the suppressed nonradiative recombination and enhanced carrier mobility are achieved, contributing to ≈20% growth in short circuit current density (Jsc) and a 23.4% higher power conversion efficiency (PCE) of 13.2%. This work provides a general framework for layer-by-layer QD film manufacturing optimization.
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Affiliation(s)
- Yuyao Wei
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Chao Ding
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, 610065, P. R. China
| | - Guozheng Shi
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
- Institution of Functional Nano and Soft Materials, Soochow university, Suzhou, Jiangsu, 215123, P. R. China
| | - Huan Bi
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Yusheng Li
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Hua Li
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Dong Liu
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Yongge Yang
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Dandan Wang
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Shikai Chen
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Ruixiang Wang
- Beijing Engineering Research Centre of Sustainable Energy and Buildings, Beijing University of Civil Engineering and Architecture, Beijing, 102616, P. R. China
| | - Shuzi Hayase
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
| | - Taizo Masuda
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
- CN development division, Toyota Motor Corporation, Susono, Shizuoka, 410-1193, Japan
| | - Qing Shen
- Faculty of Informatics and Engineering, The University of Electro Communications, Tokyo, 1828585, Japan
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2
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Petrovic M, Bonvin D, Todic J, Zivkovic R, Randjelovic M, Arsenijevic VA, Ebersold MM, Otasevic S. Surface modification of poly(methyl-methacrylate) with farnesol to prevent Candida biofilm formation. Lett Appl Microbiol 2022; 75:982-990. [PMID: 35716164 DOI: 10.1111/lam.13772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/02/2022] [Accepted: 06/06/2022] [Indexed: 11/28/2022]
Abstract
Candida albicans promotes biofilm formation on dentures, which compromises the use of poly(methyl-methacrylate) (PMMA) as a dental material. Farnesol (FAR), a natural compound that prevents C. albicans filamentation and biofilm formation, was incorporated into the PMMA matrix, to obtain antifungal PMMA_FAR materials. The tested concentrations (0·0125% and 0·4%) of FAR, 24 h after incubation on YPD agar, inhibited filamentation of C. albicans. PMMA was modified with different FAR concentrations (3-12%), and physicochemical properties, antifungal activity and cytotoxicity of these modified materials (PMMA_FAR) were tested. The presence of FAR in PMMA_FAR composites was verified by Fourier-transform infrared spectroscopy (FT-IR). Incorporation of FAR into the polymeric matrix significantly decreased hydrophilicity at all tested concentrations and significantly reduced biofilm and planktonic cells metabolic activity in the early stage of biofilm formation at ≥6% FAR in PMMA. PMMA_FAR composites with <9% FAR were non-toxic. Modification of PMMA with FAR is a good strategy for reducing C. albicans biofilm formation on dentures.
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Affiliation(s)
- M Petrovic
- Powder Technology Laboratory, Institute of Materials, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - D Bonvin
- Powder Technology Laboratory, Institute of Materials, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - J Todic
- Department of Prosthodontics, Medical Faculty, University Pristina in Kosovska Mitrovica, Mitrovica, Serbia
| | - R Zivkovic
- Department of Prosthodontics, School of Dental Medicine, University of Belgrade, Beograd, Serbia
| | - M Randjelovic
- Faculty of Medicine, Department of Microbiology and Immunology, University of Nis, Nis, Serbia
| | - V A Arsenijevic
- National Reference Medical Mycology Laboratory, Faculty of Medicine, Institute of Microbiology and Immunology, University of Belgrade, Belgarde, Serbia
| | - M M Ebersold
- Powder Technology Laboratory, Institute of Materials, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - S Otasevic
- Faculty of Medicine, Department of Microbiology and Immunology, University of Nis, Nis, Serbia
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3
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Poly(methyl methacrylate) with Oleic Acid as an Efficient Candida albicans Biofilm Repellent. MATERIALS 2022; 15:ma15113750. [PMID: 35683049 PMCID: PMC9181749 DOI: 10.3390/ma15113750] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 02/05/2023]
Abstract
Poly(methyl methacrylate) (PMMA), widely used in dentistry, is unfortunately a suitable substrate for Candida (C.) albicans colonization and biofilm formation. The key step for biofilm formation is C. albicans ability to transit from yeast to hypha (filamentation). Since oleic acid (OA), a natural compound, prevents filamentation, we modified PMMA with OA aiming the antifungal PMMA_OA materials. Physico-chemical properties of the novel PMMA_OA composites obtained by incorporation of 3%, 6%, 9%, and 12% OA into PMMA were characterized by Fourier-transform infrared spectroscopy and water contact angle measurement. To test antifungal activity, PMMA_OA composites were incubated with C. albicans and the metabolic activity of both biofilm and planktonic cells was measured with a XTT test, 0 and 6 days after composites preparation. The effect of OA on C. albicans morphology was observed after 24 h and 48 h incubation in agar loaded with 0.0125% and 0.4% OA. The results show that increase of OA significantly decreased water contact angle. Metabolic activity of both biofilm and planktonic cells were significantly decreased in the both time points. Therefore, modification of PMMA with OA is a promising strategy to reduce C. albicans biofilm formation on denture.
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4
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Kishikawa K, Takebuchi S, Takahashi H, Kohri M. Induction of a Columnar Liquid Crystal Phase at Low Temperature by Replacing Stearyl Groups with Oleyl Groups in a Discoid Molecule, and Efficient Chiral Amplification in the Liquid Crystal Phase. CHEM LETT 2022. [DOI: 10.1246/cl.220216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Keiki Kishikawa
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering
- Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Syunya Takebuchi
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering
| | - Hikaru Takahashi
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering
| | - Michinari Kohri
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering
- Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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5
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Sharma A, Kruteva M, Zamponi M, Ehlert S, Richter DO, Förster S. Quasielastic neutron scattering reveals the temperature dependent rotational dynamics of densely grafted oleic acid.. J Chem Phys 2022; 156:164908. [DOI: 10.1063/5.0089874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the dynamics of pure oleic acid as well as grafted oleic acid synthesized by decomposing iron oleate into oleic acid grafted iron oxide nanoparticles. Our quasielastic neutron scattering study shows that oleic acid dominantly performs translational diffusion at room temperature. On the other hand, in nanocomposites the constraints imposed by grafting and crowding of neighbouring chains restrict the grafted oleic acid to uniaxial rotation. Interestingly, it also manifests mobility in grafted oleic acid below the crystallization temperature of pure oleic acid. The data from grafted oleic acid could be effectively described using uniaxial rotational diffusion model with an additional elastic scattering contribution. This kind of elastic scattering arises due to the restricted bond mobility and increases with decreasing temperature. The radius of rotation obtained from the fitted data agrees very well with the geometry of the molecule and grafting density. These results open possibilities of research on the confined surfactant systems, which could be analysed using the approach described here.
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Affiliation(s)
- Aakash Sharma
- Forschungszentrum Julich GmbH Julich Centre for Neutron Science, Germany
| | | | | | - Sascha Ehlert
- Forschungszentrum Jülich GmbH Jülich Centre for Neutron Science, Germany
| | | | - Stephan Förster
- Forschungszentrum Julich GmbH Julich Centre for Neutron Science, Germany
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6
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McGrory MR, Shepherd RH, King MD, Davidson N, Pope FD, Watson IM, Grainger RG, Jones AC, Ward AD. Mie scattering from optically levitated mixed sulfuric acid-silica core-shell aerosols: observation of core-shell morphology for atmospheric science. Phys Chem Chem Phys 2022; 24:5813-5822. [PMID: 35226003 DOI: 10.1039/d1cp04068e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sulfuric acid is shown to form a core-shell particle on a micron-sized, optically-trapped spherical silica bead. The refractive indices of the silica and sulfuric acid, along with the shell thickness and bead radius were determined by reproducing Mie scattered optical white light as a function of wavelength in Mie spectroscopy. Micron-sized silica aerosols (silica beads were used as a proxy for atmospheric silica minerals) were levitated in a mist of sulfuric acid particles; continuous collection of Mie spectra throughout the collision of sulfuric acid aerosols with the optically trapped silica aerosol demonstrated that the resulting aerosol particle had a core-shell morphology. Contrastingly, the collision of aqueous sulfuric acid aerosols with optically trapped polystyrene aerosol resulted in a partially coated system. The light scattering from the optically levitated aerosols was successfully modelled to determine the diameter of the core aerosol (±0.003 μm), the shell thickness (±0.0003 μm) and the refractive index (±0.007). The experiment demonstrated that the presence of a thin film rapidly changed the light scattering of the original aerosol. When a 1.964 μm diameter silica aerosol was covered with a film of sulfuric acid 0.287 μm thick, the wavelength dependent Mie peak positions resembled sulfuric acid. Thus mineral aerosol advected into the stratosphere would likely be coated with sulfuric acid, with a core-shell morphology, and its light scattering properties would be effectively indistinguishable from a homogenous sulfuric acid aerosol if the film thickness was greater than a few 100 s of nm for UV-visible wavelengths.
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Affiliation(s)
- Megan R McGrory
- Central Laser Facility, Research Complex, STFC Rutherford Appleton Laboratory, Oxford, OX11 0FA, UK. .,Department of Earth Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK
| | - Rosalie H Shepherd
- Central Laser Facility, Research Complex, STFC Rutherford Appleton Laboratory, Oxford, OX11 0FA, UK. .,Department of Earth Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK
| | - Martin D King
- Department of Earth Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK
| | - Nicholas Davidson
- School of Geography, Earth & Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - Francis D Pope
- School of Geography, Earth & Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - I Matthew Watson
- School of Earth Science, University of Bristol, Wills Memorial Building, Bristol, BS8 1RJ, UK
| | - Roy G Grainger
- National Centre for Earth Observation, Atmospheric, Oceanic and Planetary Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - Anthony C Jones
- Met Office, Fitzroy Road, Exeter, EX1 3PB, UK.,College of Engineering Maths and Physical Sciences, University of Exeter, Exeter, EX4 4PY, UK
| | - Andrew D Ward
- Central Laser Facility, Research Complex, STFC Rutherford Appleton Laboratory, Oxford, OX11 0FA, UK.
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7
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Chakraborty S, Stubbs AD, Kahan TF. Direct Observation of Anthracene Clusters at Ice Surfaces. J Am Chem Soc 2022; 144:751-756. [PMID: 34982936 DOI: 10.1021/jacs.1c09220] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Heterogeneous processes can control atmospheric composition. Snow and ice present important, but poorly understood, reaction media that can greatly alter the composition of air in the cryosphere in polar and temperate regions. Atmospheric scientists struggle to reconcile model predictions with field observations in snow-covered regions due in part to experimental challenges associated with monitoring reactions at air-ice interfaces, and debate regarding reaction kinetics and mechanisms has persisted for over a decade. In this work, we use wavelength-resolved fluorescence microscopy to determine the distribution and chemical speciation of the pollutant anthracene at environmentally relevant frozen surfaces. Our results indicate that anthracene adsorbs to frozen surfaces in monomeric form, but that following lateral diffusion, molecules ultimately reside within brine channels at saltwater ice surfaces, and in micron-sized clusters at freshwater ice surfaces; emission profiles indicate extensive self-association. We also measure anthracene photodegradation kinetics in aqueous solution and artificial snow prepared from frozen freshwater and saltwater solutions. Our results suggest that anthracene─and likely other aromatic pollutants─undergo bimolecular photodegradation at the surface of freshwater ice and sea ice, but not at the surface of frozen organic matter. These results will improve predictions of pollutant fate and exposure risk in the cryosphere. The techniques used can be applied to numerous surfaces within and beyond the atmospheric sciences.
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Affiliation(s)
- Subha Chakraborty
- Dept. of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Annastacia D Stubbs
- Dept. of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada.,Dept. of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, New York 13244, United States
| | - Tara F Kahan
- Dept. of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada.,Dept. of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, New York 13244, United States
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8
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Or VW, Wade M, Patel S, Alves MR, Kim D, Schwab S, Przelomski H, O'Brien R, Rim D, Corsi RL, Vance ME, Farmer DK, Grassian VH. Glass surface evolution following gas adsorption and particle deposition from indoor cooking events as probed by microspectroscopic analysis. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:1698-1709. [PMID: 32661531 DOI: 10.1039/d0em00156b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Indoor surfaces are extremely diverse and their interactions with airborne compounds and aerosols influence the lifetime and reactivity of indoor emissions. Direct measurements of the physical and chemical state of these surfaces provide insights into the underlying physical and chemical processes involving surface adsorption, surface partitioning and particle deposition. Window glass, a ubiquitous indoor surface, was placed vertically during indoor activities throughout the House Observations of Microbial and Environmental Chemistry (HOMEChem) campaign and then analyzed to measure changes in surface morphology and surface composition. Atomic force microscopy-infrared (AFM-IR) spectroscopic analyses reveal that deposition of submicron particles from cooking events is a contributor to modifying the chemical and physical state of glass surfaces. These results demonstrate that the deposition of glass surfaces can be an important sink for organic rich particles material indoors. These findings also show that particle deposition contributes enough organic matter from a single day of exposure equivalent to a uniform film up to two nanometers in thickness, and that the chemical distinctness of different indoor activities is reflective of the chemical and morphological changes seen in these indoor surfaces. Comparison of the experimental results to physical deposition models shows variable agreement, suggesting that processes not captured in physical deposition models may play a role in the sticking of particles on indoor surfaces.
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Affiliation(s)
- Victor W Or
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA.
| | - Michael Wade
- Department of Civil, Architectural and Environmental Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Sameer Patel
- Mechanical Engineering Department, University of Colorado Boulder, Boulder, Colorado 80309, USA
| | - Michael R Alves
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA.
| | - Deborah Kim
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA.
| | - Sarah Schwab
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA.
| | - Hannah Przelomski
- Department of Chemistry, William & Mary, Williamsburg, Virginia 23185, USA
| | - Rachel O'Brien
- Department of Chemistry, William & Mary, Williamsburg, Virginia 23185, USA
| | - Donghyun Rim
- Department of Architectural Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Richard L Corsi
- Maseeh College of Engineering & Computer Science, Portland State University, Portland, Oregon 97021, USA
| | - Marina E Vance
- Mechanical Engineering Department, University of Colorado Boulder, Boulder, Colorado 80309, USA
| | - Delphine K Farmer
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
| | - Vicki H Grassian
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA. and Scripps Institution of Oceanography and Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, USA
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9
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Shatan AB, Venclíková K, Zasońska BA, Patsula V, Pop-Georgievski O, Petrovský E, Horák D. Antibacterial Silver-Conjugated Magnetic Nanoparticles: Design, Synthesis and Bactericidal Effect. Pharm Res 2019; 36:147. [DOI: 10.1007/s11095-019-2680-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 08/02/2019] [Indexed: 12/13/2022]
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10
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Sánchez-Cabezas S, Montes-Robles R, Gallo J, Sancenón F, Martínez-Máñez R. Combining magnetic hyperthermia and dual T1/T2 MR imaging using highly versatile iron oxide nanoparticles. Dalton Trans 2019; 48:3883-3892. [PMID: 30839027 DOI: 10.1039/c8dt04685a] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Magnetic hyperthermia and magnetic resonance imaging (MRI) are two of the most important biomedical applications of magnetic nanoparticles (MNPs). However, the design of MNPs with good heating performance for hyperthermia and dual T1/T2 contrast for MRI remains a considerable challenge. In this work, ultrasmall superparamagnetic iron oxide nanoparticles (USPIONs) are synthesized through a simple one-step methodology. A post-synthetic purification strategy has been implemented in order to separate discrete nanoparticles from aggregates and unstable nanoparticles, leading to USPIONs that preserve chemical and colloidal stability for extended periods of time. The optimized nanoparticles exhibit high saturation magnetization and show good heating efficiency in magnetic hyperthermia experiments. Remarkably, the evaluation of the USPIONs as MRI contrast agents revealed that the nanoparticles are also able to provide significant dual T1/T2 signal enhancement. These promising results demonstrate that USPIONs are excellent candidates for the development of theranostic nanodevices with potential application in both hyperthermia and dual T1/T2 MR imaging.
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Affiliation(s)
- Santiago Sánchez-Cabezas
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera s/n., 46022 Valencia, Spain.
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11
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Vakil P, Muhammed F, Hardy D, Dickens TJ, Ramakrishnan S, Strouse GF. Dielectric Properties for Nanocomposites Comparing Commercial and Synthetic Ni- and Fe 3O 4-Loaded Polystyrene. ACS OMEGA 2018; 3:12813-12823. [PMID: 31458007 PMCID: PMC6644897 DOI: 10.1021/acsomega.8b01477] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/26/2018] [Indexed: 05/12/2023]
Abstract
Nanomaterial-loaded thermoplastics are attractive for applications in adaptive printing methods, as the physical properties of the printed materials are dependent on the nanomaterial type and degree of dispersion. This study compares the dispersion and the impact on the dielectric properties of two common nanoparticles, nickel and iron oxide, loaded into polystyrene. Comparisons between commercial and synthetically prepared samples indicate that well-passivated synthetically prepared nanomaterials are dispersed and minimize the impact on the dielectric properties of the host polymer by limiting particle-particle contacts. Commercial samples were observed to phase-segregate, leading to the loss of the low-k performance of polystyrene. The change in the real and imaginary dielectric was systematically studied in two earth abundant nanoparticles at the concentration between 0 and 13 vol % (0-50 wt %). By varying the volume percentage of fillers in the matrix, it is shown that one can increase the magnetic properties of the materials while minimizing unwanted contributions to the dielectric constant and dielectric loss. The well-dispersed nanoparticle systems were successfully modeled through the Looyenga dielectric theory, thus giving one a predictive ability for the dielectric properties. The current experimental work coupled with modeling could facilitate future material choices and guide design rules for printable polymer composite systems.
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Affiliation(s)
- Parth
N. Vakil
- Department
of Chemistry and Biochemistry, Florida State
University, 95 Chieftan Way, Tallahassee, Florida 32306, United
States
| | - Faheem Muhammed
- Chemical & Biomedical Engineering and Department of Industrial
and Manufacturing
Engineering, FAMU-FSU College of Engineering, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
| | - David Hardy
- Department
of Chemistry and Biochemistry, Florida State
University, 95 Chieftan Way, Tallahassee, Florida 32306, United
States
| | - Tarik J. Dickens
- Chemical & Biomedical Engineering and Department of Industrial
and Manufacturing
Engineering, FAMU-FSU College of Engineering, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
- High
Performance Materials Institute, 2005 Levy Avenue, Tallahassee, Florida 32310, United
States
| | - Subramanian Ramakrishnan
- Chemical & Biomedical Engineering and Department of Industrial
and Manufacturing
Engineering, FAMU-FSU College of Engineering, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
- E-mail: (S.R.)
| | - Geoffrey F. Strouse
- Department
of Chemistry and Biochemistry, Florida State
University, 95 Chieftan Way, Tallahassee, Florida 32306, United
States
- E-mail: (G.F.S.)
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12
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Pfrang C, Rastogi K, Cabrera-Martinez ER, Seddon AM, Dicko C, Labrador A, Plivelic TS, Cowieson N, Squires AM. Complex three-dimensional self-assembly in proxies for atmospheric aerosols. Nat Commun 2017; 8:1724. [PMID: 29170428 PMCID: PMC5701067 DOI: 10.1038/s41467-017-01918-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 10/25/2017] [Indexed: 01/23/2023] Open
Abstract
Aerosols are significant to the Earth’s climate, with nearly all atmospheric aerosols containing organic compounds that often contain both hydrophilic and hydrophobic parts. However, the nature of how these compounds are arranged within an aerosol droplet remains unknown. Here we demonstrate that fatty acids in proxies for atmospheric aerosols self-assemble into highly ordered three-dimensional nanostructures that may have implications for environmentally important processes. Acoustically trapped droplets of oleic acid/sodium oleate mixtures in sodium chloride solution are analysed by simultaneous synchrotron small-angle X-ray scattering and Raman spectroscopy in a controlled gas-phase environment. We demonstrate that the droplets contained crystal-like lyotropic phases including hexagonal and cubic close-packed arrangements of spherical and cylindrical micelles, and stacks of bilayers, whose structures responded to atmospherically relevant humidity changes and chemical reactions. Further experiments show that self-assembly reduces the rate of the reaction of the fatty acid with ozone, and that lyotropic-phase formation also occurs in more complex mixtures more closely resembling compositions of atmospheric aerosols. We suggest that lyotropic-phase formation likely occurs in the atmosphere, with potential implications for radiative forcing, residence times and other aerosol characteristics. Nearly all atmospheric aerosols contain surface-active organic compounds; however, the nature of how they arrange remains poorly understood. Here, the authors show that fatty acids in atmospheric aerosol proxies self-assemble into highly ordered, viscous 3D nanostructures that undergo changes upon exposure to humidity and ozone.
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Affiliation(s)
- C Pfrang
- Department of Chemistry, University of Reading, Whiteknights Campus, PO Box 224, Reading, RG6 6AD, UK.
| | - K Rastogi
- Department of Chemistry, University of Reading, Whiteknights Campus, PO Box 224, Reading, RG6 6AD, UK
| | - E R Cabrera-Martinez
- Department of Chemistry, University of Reading, Whiteknights Campus, PO Box 224, Reading, RG6 6AD, UK
| | - A M Seddon
- H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UK.,Bristol Centre for Functional Nanomaterials, H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UK
| | - C Dicko
- Pure and Applied Biochemistry, Chemical Center, University of Lund, Naturvetarvägen 14, 22241, Lund, Sweden
| | - A Labrador
- MAX IV Laboratory, University of Lund, PO Box 188, 22100, Lund, Sweden
| | - T S Plivelic
- MAX IV Laboratory, University of Lund, PO Box 188, 22100, Lund, Sweden
| | - N Cowieson
- Diamond Light Source, Harwell Science & Innovation Campus, Didcot, OX11 0DE, UK
| | - A M Squires
- Department of Chemistry, University of Reading, Whiteknights Campus, PO Box 224, Reading, RG6 6AD, UK. .,Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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13
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Samoila F, Sirghi L. Disjoining Pressure in Partial Wetting on the Nanoscale. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5188-5196. [PMID: 28485609 DOI: 10.1021/acs.langmuir.7b01156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Partial wetting on the nanoscale may result in the formation of sessile liquid nanodroplets on flat substrates. In this case, the molecular forces generate a strong interaction between nanodroplet interfaces. This interaction is expressed in the mean-field approximation by the disjoining pressure and determines an important deviation from the spherical cap shape of the nanodroplets. This deviation is observed on the atomic force microscopy images of sessile nanodroplets of oleic acid on glass. The disjoining pressure was manipulated by hydroxylation of the glass surface. This surface modification generated a strong negative disjoining pressure due to structural forces arising from the orientation of oleic acid molecules with their polar heads toward the substrate. As a result, the shape of oleic acid nanodroplets showed large deviations from the spherical cap shape, with the liquid-vapor interface tilting angle with respect to the plane substrate having a maximum (herein considered to be the contact angle) a certain distance from the substrate, followed by its decrease to zero at the droplet edge. The integration of the augmented Young-Laplace equation, where the dependence of the negative structural disjoining pressure on the interface separation distance was assumed to be an exponential decay, yielded height profiles of droplets in good agreement with the experiment.
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Affiliation(s)
- Florentina Samoila
- Iasi Plasma Advanced Research Center (IPARC), Faculty of Physics, "Alexandru Ioan Cuza", University of Iasi , Iasi-700506, Romania
| | - Lucel Sirghi
- Iasi Plasma Advanced Research Center (IPARC), Faculty of Physics, "Alexandru Ioan Cuza", University of Iasi , Iasi-700506, Romania
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Woods E, Hull AW, Tigue ML. Uptake of Pyrene onto Fatty Acid Coated NaCl Aerosol Particles. J Phys Chem A 2016; 120:10160-10168. [PMID: 27991789 DOI: 10.1021/acs.jpca.6b11023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Photoelectric charging experiments monitor the uptake of pyrene onto NaCl aerosol particles coated with either oleic acid or myristic acid. In both cases, thin coatings produce a small net decrease in pyrene uptake. In the larger coverage limit, the uptake of the myristic acid coated particles remains nearly constant whereas the oleic acid coated particles exhibit greater uptake rates than the bare NaCl particles. Fitting the results with a multilayer kinetic model yields uptake rate coefficients as well as parameters that describe the distribution of organic molecules on the aerosol particle surface. The model accounts for the decrease in uptake associated with thin coatings of oleic acid through a concomitant reduction in surface area. The adsorption rate constants for the myristic and oleic acid coated surfaces are 50 and 80 times faster, respectively, than for NaCl. The desorption rates for pyrene on the fatty acid surfaces are faster, as well. For myristic acid coatings, the fast desorption (over 400 times the rate of desorption from NaCl) results in slower net adsorption, whereas for oleic acid (approximately 12 times the desorption rate from NaCl), the net uptake rate increases with coverage. The results also suggest that both myristic acid and oleic acid spread incompletely on the aerosol surfaces under the conditions of these experiments. In the optimized kinetic model, the fatty acids cover approximately 50% of the surface when the nominal coating thickness is approximately 6 nm. The surface is over 90% covered with a nominal coating thickness of 20 nm, which is approximately 10% of particle diameter in these experiments. Very thin oleic acid coatings reduce the surface area of particles consistent with the preferential coverage of highly corrugated or porous regions.
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Affiliation(s)
- Ephraim Woods
- Department of Chemistry, Colgate University , Hamilton, New York 13346, United States
| | - Alexander W Hull
- Department of Chemistry, Colgate University , Hamilton, New York 13346, United States
| | - Megan L Tigue
- Department of Chemistry, Colgate University , Hamilton, New York 13346, United States
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15
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Gårdebjer S, Gebäck T, Andersson T, Fratini E, Baglioni P, Bordes R, Viridén A, Nicholas M, Lorén N, Larsson A. The impact of interfaces in laminated packaging on transport of carboxylic acids. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.06.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Novák J, Banerjee R, Kornowski A, Jankowski M, André A, Weller H, Schreiber F, Scheele M. Site-Specific Ligand Interactions Favor the Tetragonal Distortion of PbS Nanocrystal Superlattices. ACS APPLIED MATERIALS & INTERFACES 2016; 8:22526-22533. [PMID: 27504626 DOI: 10.1021/acsami.6b06989] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We analyze the structure and morphology of mesocrystalline, body-centered tetragonal (bct) superlattices of PbS nanocrystals functionalized with oleic acid. On the basis of combined scattering and real space imaging, we derive a three-dimensional (3D) model of the superlattice and show that the bct structure benefits from a balanced combination of {100}PbS-{100}PbS and {111}PbS-{111}PbS interactions between neighboring layers of nanocrystals, which uniquely stabilizes this structure. These interactions are enabled by the coaxial alignment of the atomic lattices of PbS with the superlattice. In addition, we find that this preferential orientation is already weakly present within isolated monolayers. By adding excess oleic acid to the nanocrystal solution, tetragonal distortion is suppressed, and we observe assembly into a bilayered hexagonal lattice reminiscent of a honeycomb with grain sizes of several micrometers.
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Affiliation(s)
- Jiřı́ Novák
- Central European Institute of Technology, Masaryk University , Kamenice 5, CZ-62500 Brno, Czech Republic
- Department of Condensed Matter Physics, Masaryk University , Kotlářská 2, CZ-61137 Brno, Czech Republic
| | - Rupak Banerjee
- Department of Physics, Indian Institute of Technology Gandhinagar , Palaj, Gandhinagar 382355, India
| | - Andreas Kornowski
- Institute of Physical Chemistry and The Hamburg Centre for Ultrafast Imaging, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
| | - Maciej Jankowski
- Beamline ID03, European Synchrotron Radiation Facility , Grenoble F-38043, France
| | - Alexander André
- Institute of Physical and Theoretical Chemistry, University of Tübingen , Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Horst Weller
- Institute of Physical Chemistry and The Hamburg Centre for Ultrafast Imaging, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
| | - Frank Schreiber
- Institute of Applied Physics, University of Tübingen , Auf der Morgenstelle 10, 72076 Tübingen, Germany
- Center for Light-Matter Interaction, Sensors & Analytics, University of Tübingen , Auf der Morgenstelle 15, 72076 Tübingen, Germany
| | - Marcus Scheele
- Institute of Physical and Theoretical Chemistry, University of Tübingen , Auf der Morgenstelle 18, 72076 Tübingen, Germany
- Center for Light-Matter Interaction, Sensors & Analytics, University of Tübingen , Auf der Morgenstelle 15, 72076 Tübingen, Germany
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Ergin G, Takahama S. Carbon Density Is an Indicator of Mass Accommodation Coefficient of Water on Organic-Coated Water Surface. J Phys Chem A 2016; 120:2885-93. [DOI: 10.1021/acs.jpca.6b01748] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gözde Ergin
- Atmospheric Particle and
Research Laboratory, School of Architecture, Civil and Environmental
Engineering, Swiss Federal Institute of Technology Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Satoshi Takahama
- Atmospheric Particle and
Research Laboratory, School of Architecture, Civil and Environmental
Engineering, Swiss Federal Institute of Technology Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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18
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Manet S, Cuvier AS, Valotteau C, Fadda GC, Perez J, Karakas E, Abel S, Baccile N. Structure of Bolaamphiphile Sophorolipid Micelles Characterized with SAXS, SANS, and MD Simulations. J Phys Chem B 2015; 119:13113-33. [DOI: 10.1021/acs.jpcb.5b05374] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Sabine Manet
- Sorbonne Universités, UPMC Univ Paris 06,
CNRS, Collège de France, UMR 7574, Chimie de la Matière
Condensée de Paris, F-75005 Paris, France
| | - Anne-Sophie Cuvier
- Sorbonne Universités, UPMC Univ Paris 06,
CNRS, Collège de France, UMR 7574, Chimie de la Matière
Condensée de Paris, F-75005 Paris, France
| | - Claire Valotteau
- Sorbonne Universités, UPMC Univ Paris 06,
CNRS, Collège de France, UMR 7574, Chimie de la Matière
Condensée de Paris, F-75005 Paris, France
| | - Giulia C. Fadda
- Laboratoire
Léon
Brillouin, LLB, CEA Saclay, F-91191 CEDEX Gif-sur-Yvette, France
| | - Javier Perez
- SWING, Synchrotron
Soleil, BP 48, F-91192 Gif-sur-Yvette, France
| | - Esra Karakas
- Maison
de la Simulation, USR 3441, CEA − CNRS − INRIA, Univ. Paris-Sud − Univ. de Versailles, 91191 CEDEX Gif-sur-Yvette, France
- Institute
for Integrative Biology of the Cell (I2BC), Commissariat à
l’Energie Atomique et aux Energies Alternatives (CEA), Centre
National de la Recherche Scientifique (CNRS), Université Paris-Sud, CEA-Saclay, F-91191 Gif-sur-Yvette, France
| | - Stéphane Abel
- Institute
for Integrative Biology of the Cell (I2BC), Commissariat à
l’Energie Atomique et aux Energies Alternatives (CEA), Centre
National de la Recherche Scientifique (CNRS), Université Paris-Sud, CEA-Saclay, F-91191 Gif-sur-Yvette, France
| | - Niki Baccile
- Sorbonne Universités, UPMC Univ Paris 06,
CNRS, Collège de France, UMR 7574, Chimie de la Matière
Condensée de Paris, F-75005 Paris, France
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Nájera JJ, Percival CJ, Horn AB. Infrared Spectroscopic Evidence for a Heterogeneous Reaction between Ozone and Sodium Oleate at the Gas-Aerosol Interface: Effect of Relative Humidity. INT J CHEM KINET 2015. [DOI: 10.1002/kin.20907] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Juan J. Nájera
- School of Earth, Atmospheric and Environmental Sciences; Faculty of Engineering and Physical Sciences; The University of Manchester; M13 9PL Manchester UK
| | - Carl J. Percival
- School of Earth, Atmospheric and Environmental Sciences; Faculty of Engineering and Physical Sciences; The University of Manchester; M13 9PL Manchester UK
| | - Andrew B. Horn
- School of Chemistry, Faculty of Engineering and Physical Sciences; The University of Manchester; M13 9PL Manchester UK
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20
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Krishnan A, Sreeremya TS, Ghosh S. Morphological evolution and growth of cerium oxide nanostructures by virtue of organic ligands as well as monomer concentration. CrystEngComm 2015. [DOI: 10.1039/c5ce00965k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Sobanska S, Barbillat J, Moreau M, Nuns N, De Waele I, Petitprez D, Tobon Y, Brémard C. Influence of stearic acid coating of the NaCl surface on the reactivity with NO2 under humidity. Phys Chem Chem Phys 2015; 17:10963-77. [DOI: 10.1039/c4cp05655h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In the atmosphere, sea salt aerosols, containing mainly NaCl, can accumulate fatty acids on surface and undergo spatially heterogeneous chemistry with atmospheric nitrogen oxides.
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Affiliation(s)
- S. Sobanska
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR)
- UMR CNRS 8516
- Université de Lille Science et Technologie
- 59655 Villeneuve d'Ascq Cedex
- France
| | - J. Barbillat
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR)
- UMR CNRS 8516
- Université de Lille Science et Technologie
- 59655 Villeneuve d'Ascq Cedex
- France
| | - M. Moreau
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR)
- UMR CNRS 8516
- Université de Lille Science et Technologie
- 59655 Villeneuve d'Ascq Cedex
- France
| | - N. Nuns
- Institut des Molécules et de la Matière Condensée de Lille
- IMMCL Chevreul
- 59655 Villeneuve d'Ascq Cedex
- France
| | - I. De Waele
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR)
- UMR CNRS 8516
- Université de Lille Science et Technologie
- 59655 Villeneuve d'Ascq Cedex
- France
| | - D. Petitprez
- Laboratoire de PhysicoChimie des Processus de Combustion et de l'Atmosphère (PC2A)
- UMR CNRS 8522
- Université de Lille
- Sciences et Technologie
- Bât C11
| | - Y. Tobon
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR)
- UMR CNRS 8516
- Université de Lille Science et Technologie
- 59655 Villeneuve d'Ascq Cedex
- France
| | - C. Brémard
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR)
- UMR CNRS 8516
- Université de Lille Science et Technologie
- 59655 Villeneuve d'Ascq Cedex
- France
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22
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Pujari SP, Scheres L, Marcelis ATM, Zuilhof H. Covalent Surface Modification of Oxide Surfaces. Angew Chem Int Ed Engl 2014; 53:6322-56. [DOI: 10.1002/anie.201306709] [Citation(s) in RCA: 583] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Indexed: 12/26/2022]
Affiliation(s)
- Sidharam P. Pujari
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (The Netherlands)
| | - Luc Scheres
- Surfix B.V. Dreijenplein 8, 6703 HB Wageningen (The Netherlands)
| | - Antonius T. M. Marcelis
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (The Netherlands)
| | - Han Zuilhof
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (The Netherlands)
- Department of Chemical and Materials Engineering, King Abdulaziz University, Jeddah (Saudi Arabia)
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23
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Pujari SP, Scheres L, Marcelis ATM, Zuilhof H. Kovalente Oberflächenmodifikationen von Oxiden. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201306709] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sidharam P. Pujari
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (Niederlande)
| | | | - Antonius T. M. Marcelis
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (Niederlande)
| | - Han Zuilhof
- Laboratory of Organic Chemistry, Wageningen University, P.O. Box 26, 6703 HB Wageningen (Niederlande)
- Department of Chemical and Materials Engineering, King Abdulaziz University, Jeddah (Saudi‐Arabien)
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24
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Styler SA, Myers AL, Donaldson DJ. Heterogeneous photooxidation of fluorotelomer alcohols: a new source of aerosol-phase perfluorinated carboxylic acids. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:6358-6367. [PMID: 23688121 DOI: 10.1021/es4011509] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Little is known of the atmospheric fate(s) of fluorotelomer alcohols (FTOHs), a class of high-production-volume chemicals used in the production of water- and oil-repelling surface coatings and which have been detected in a wide variety of urban and remote environmental matrices. In the present study, we investigated the uptake and photochemistry of FTOHs at the surface of TiO2, Fe2O3, Mauritanian sand, and Icelandic volcanic ash. Gas-phase 3,3,3-trifluoropropanol, 4:2 FTOH, and 6:2 FTOH exhibited significant uptake to each of the surfaces under study. The sand- and ash-catalyzed heterogeneous photooxidation of 6:2 FTOH resulted in the rapid production and subsequent slow degradation of surface-sorbed perfluorinated carboxylic acids (PFCAs). We suggest that this transformation, which proceeds via saturated and unsaturated fluorotelomer carboxylic acid intermediates (6:2 FTCA/FTUCA), is catalyzed by Fe and Ti contained within the samples. These results provide the first evidence that the heterogeneous oxidation of FTOHs at metal-rich atmospheric surfaces may provide a significant loss mechanism for these chemicals and also act as a source of aerosol-phase PFCAs close to source regions. Subsequent long-range transport of these aerosol-sorbed PFCAs has the potential to join oceanic transport and local gas-phase FTOH oxidation as a source of PFCAs to Arctic regions.
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Affiliation(s)
- Sarah A Styler
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
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25
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Takahama S, Russell LM. A molecular dynamics study of water mass accommodation on condensed phase water coated by fatty acid monolayers. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010jd014842] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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26
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Takahama S, Liu S, Russell LM. Coatings and clusters of carboxylic acids in carbon-containing atmospheric particles from spectromicroscopy and their implications for cloud-nucleating and optical properties. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd012622] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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27
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Alshawa A, Dopfer O, Harmon CW, Nizkorodov SA, Underwood JS. Hygroscopic Growth and Deliquescence of NaCl Nanoparticles Coated with Surfactant AOT. J Phys Chem A 2009; 113:7678-86. [DOI: 10.1021/jp809869r] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ahmad Alshawa
- Department of Chemistry, University of California, Irvine, California 92697-2025, and Institut fuer Optik und Atomare Physik, Technische Universitaet Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany
| | - Otto Dopfer
- Department of Chemistry, University of California, Irvine, California 92697-2025, and Institut fuer Optik und Atomare Physik, Technische Universitaet Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany
| | - Christopher W. Harmon
- Department of Chemistry, University of California, Irvine, California 92697-2025, and Institut fuer Optik und Atomare Physik, Technische Universitaet Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany
| | - Sergey A. Nizkorodov
- Department of Chemistry, University of California, Irvine, California 92697-2025, and Institut fuer Optik und Atomare Physik, Technische Universitaet Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany
| | - Joelle S. Underwood
- Department of Chemistry, University of California, Irvine, California 92697-2025, and Institut fuer Optik und Atomare Physik, Technische Universitaet Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany
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28
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Nájera JJ, Horn AB. Infrared spectroscopic study of the effect of oleic acid on the deliquescence behaviour of ammonium sulfate aerosol particles. Phys Chem Chem Phys 2009; 11:483-94. [DOI: 10.1039/b812182f] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Rosen EP, Garland ER, Baer T. Ozonolysis of Oleic Acid Adsorbed to Polar and Nonpolar Aerosol Particles. J Phys Chem A 2008; 112:10315-24. [DOI: 10.1021/jp8045802] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elias P. Rosen
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290
| | - Eva R. Garland
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290
| | - Tomas Baer
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290
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