169 results match your criteria heavy coatings

Exhaustive valorization of cashew nut shell waste as a potential bioresource material.

Sci Rep 2021 Jun 7;11(1):11986. Epub 2021 Jun 7.

Zambia Agriculture Research Institute, Mongu, Zambia.

In this paper, we report extraction of cashew nut shell liquid (CNSL) from cashew nut shell waste (CNSW) and further use of residues for generation of activated carbon for removal of heavy metals and methylene blue (MB). Solvent extraction yielded 24.6 ± 0. Read More

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Double-Sided, Omnidirectional γ-AlOOH Hierarchical Nanostructures: Imparting Enhanced Antireflective Properties with Self-Cleaning Capacity for Optical Devices.

Langmuir 2021 Jun 1;37(23):6953-6966. Epub 2021 Jun 1.

Nanotech Research, Innovation and Incubation Center, PSG Institute of Advanced Studies, Coimbatore 641004, India.

Herein, we have successfully developed an integrated strategy to develop antireflective coatings with self-cleaning capabilities based on periodic double-sided photonic γ-AlOOH nanostructures to transmit maximum incident light photons. Interfacial reflections are instinctive and one of the fundamental phenomena occurring at interfaces owing to refractive index mismatch. The eradication of such undesirable light reflection is of significant consideration in many optical devices. Read More

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Hot-Probe Characterization of Transparent Conductive Thin Films.

Materials (Basel) 2021 Mar 3;14(5). Epub 2021 Mar 3.

Engineering Faculty, Holon Institute of Technology (HIT), Holon 5810201, Israel.

Transparent conductive oxide (TCO) thin films represent a large class of wide-bandgap semiconductors applied in all fields of micro- and optoelectronics. The most widespread material applied for the creation of TCO coatings is indium-tin oxide (ITO). At the same time, there are plurality trends to change the high-cost ITO on other materials, for example, on the ZnO doped by different elements such as Al, Mn, and Sb. Read More

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Environmentally friendly, durable and transparent anti-fouling coatings applicable onto various substrates.

J Colloid Interface Sci 2021 Jun 6;591:429-439. Epub 2021 Feb 6.

Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China. Electronic address:

Anti-fouling coatings are of great interest because of their unique wettability and self-cleaning property, but their widespread applications are seriously hindered by low stability, heavy usage of fluorinated compounds and low transparency, etc. Here, we report a new kind of smooth anti-fouling coatings based on methyltrimethoxysilane. The coatings were fabricated by preparing a stock solution via hydrolytic condensation of methyltrimethoxysilane in isopropanol, followed by wiping the glass slide with the non-woven fabric that sucked the stock solution. Read More

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In-situ grafting temperature-responsive hydrogel as a bifunctional solid-phase microextraction coating for tunable extraction of biomacromolecules.

J Chromatogr A 2021 Feb 21;1639:461928. Epub 2021 Jan 21.

College of Science, China University of Petroleum (East China), Qingdao 266580, PR China. Electronic address:

A temperature-responsive solid-phase microextraction (SPME) coating was prepared via in-situ atom transfer radical polymerization (ATRP) method. By controlling the temperature of solution below and above the lower critical solution temperature (LCST) of the coating, it can switch between hydrophilic and hydrophobic, thus providing a convenient approach for the selective extraction of analytes with different polarities. The average extraction amount of temperature-responsive coating for polar analytes is about 1. Read More

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February 2021

Preparation of Multipurpose Polyvinylidene Fluoride Membranes via a Spray-Coating Strategy Using Waterborne Polymers.

ACS Appl Mater Interfaces 2021 Jan 14;13(3):4485-4498. Epub 2021 Jan 14.

Department of Chemistry, Queen's University, 90 Bader Lane, Kingston K7L 3N6, Canada.

As reported herein, the waterborne polymers poly(glycidyl methacrylate--poly(ethylene glycol) methyl ether methacrylate) P(GMA--mPEGMA) and polyethyleneimine (PEI) were used to prepare multipurpose polyvinylidene fluoride (PVDF) membranes via a direct spray-coating method. P(GMA--mPEGMA) and PEI were alternately sprayed onto the PVDF membrane to yield stable cross-linked copolymer coatings. The successful coating of polymers onto the membrane surface was verified by scanning electron microscopy, attenuated total reflectance-Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy characterization. Read More

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January 2021

Role of Copper Oxide on Epoxy Coatings with New Intumescent Polymer-Based Fire Retardant.

Molecules 2020 Dec 17;25(24). Epub 2020 Dec 17.

Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.

Epoxy resins (EP) have been used as a thermos-setting material in the field of coating, casting, bonding agent, and laminating. However, a major drawback associated with its use is the lack of good flaming properties, and it is responsible for heavy smoke along with hazardous gases considerably limiting its uses in various fields. In this study, -ethanolamine triazine-piperizine, a melamine polymer (ETPMP), was established as a new charring-foaming agent and was successfully synthesized with ethanolamine, piperizine, cyanuric chloride, and melamine as precursor molecules via the nucleophilic substitution reaction method. Read More

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December 2020

Effects of 'in-service' conditions - mimicked hull roughness ranges and biofilms - on the surface and the hydrodynamic characteristics of foul-release type coatings.

Biofouling 2020 10 8;36(9):1074-1089. Epub 2020 Dec 8.

International Paint Singapore Pte Ltd, Singapore, Singapore.

To develop a better understanding of 'in-service' performance of modern marine coatings, this study explored the combined effects of different roughness ranges of foul-release coating (FRC) and light biofouling (slime) on the surface, boundary layer and drag characteristics under a range of 'in-service' conditions. Natural and laboratory biofilms were grown dynamically on FRC panels by exposing panels in facilities dedicated to realistic fouling culture. The boundary layer experiments were conducted in a circulating water tunnel. Read More

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October 2020

A Critical Review on Thin-Film Nanocomposite Membranes with Interlayered Structure: Mechanisms, Recent Developments, and Environmental Applications.

Environ Sci Technol 2020 12 19;54(24):15563-15583. Epub 2020 Nov 19.

Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, SAR, P. R. China.

The separation properties of polyamide reverse osmosis and nanofiltration membranes, widely applied for desalination and water reuse, are constrained by the permeability-selectivity upper bound. Although thin-film nanocomposite (TFN) membranes incorporating nanomaterials exhibit enhanced water permeance, their rejection is only moderately improved or even impaired due to agglomeration of nanomaterials and formation of defects. A novel type of TFN membranes featuring an interlayer of nanomaterials (TFNi) has emerged in recent years. Read More

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December 2020

Variations in physicochemical properties of airborne particles during a heavy haze-to-dust episode in Beijing.

Sci Total Environ 2021 Mar 17;762:143081. Epub 2020 Oct 17.

State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China. Electronic address:

The variations in physicochemical properties of airborne particles collected during a typical transition from haze to dust were investigated using single particle analysis with transmission and scanning electron microscopes combined with online measurement of chemical compositions of airborne particles in Beijing in February 2013. The transition was divided into three phases based on the weather condition. During haze pollution (Phase 1), gaseous and particle pollutants enhanced gradually. Read More

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[Pollution and Source Analysis of Heavy Metal in Surface Dust from Xi'an University Campuses].

Huan Jing Ke Xue 2020 Aug;41(8):3556-3562

College of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China.

Surface dust samples were collected from university campuses in Xi'an, and X-ray fluorescent spectrometry was used to determine the contents of nine heavy metals (Mn, As, Pb, Cr, Co, Ni, Cu, V, and Zn). Enrichment factors were subsequently used to determine the enrichment degree of each element and the preliminary determination of the pollution sources. The R programming language and SPSS were used for cluster analysis and principal components analysis to identify the pollution sources. Read More

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Characterization, Processing, and Application of Heavy Fuel Oil Ash, an Industrial Waste Material - A Review.

Chem Rec 2020 Dec 20;20(12):1568-1595. Epub 2020 Oct 20.

Center of Research Excellence in Corrosion, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia.

Heavy fuel oil ash (HFOA) is generated as an industrial waste material during the combustion of heavy fuel oil in power/desalination plants. With increasing energy demands, a significant volume of HFOA is generated. It is generally disposed of in landfills, causing environmental pollution, as it contains several toxic elements. Read More

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December 2020

Bunching of light ions driven by heavy-ion front in multispecies ion beam accelerated by laser.

Phys Rev E 2020 Aug;102(2-1):023212

P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 119991, Russia.

Deeply modulated ion spectra from contaminants present on the target surface were measured at the interaction of ultraintense (2-5)×10^{20}W/cm^{2} and high-contrast laser pulses (≲10^{-10}) with thin (∼μm) and ultrathin (∼nm) targets. This phenomenon, observed over a wide range of laser and target parameters, suggests that it is a generic feature of multispecies ion acceleration at high laser pulse contrast. The modulation is ascribed to the acceleration of various ion species at the rear of the target with steplike density profiles which provide well-separated ion species in the accelerated beam. Read More

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Alteration of yellow traffic paint in simulated environmental and biological fluids.

Sci Total Environ 2021 Jan 7;750:141202. Epub 2020 Aug 7.

Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA 19104-6316, USA; Center of Excellence in Environmental Toxicology, University of Pennsylvania, Philadelphia, PA 19104-6316, USA.

Pollution from heavy metals in urban environments is a topic of growing concern because many metals, including Pb and Cr, are a human health hazard. Exposure to Pb and Cr has been linked to the inhibition of neurological development as well as toxic effects on many organs. Yellow traffic paint (YTP) is a mixture that contains organic polymers, binders, and pigments, which in some cases consist of crocoite (PbCrO) that may be coated by silica. Read More

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January 2021

Water/Methanol-Insoluble Brown Carbon Can Dominate Aerosol-Enhanced Light Absorption in Port Cities.

Environ Sci Technol 2020 12 18;54(23):14889-14898. Epub 2020 Nov 18.

Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.

Light absorption enhancement () of black carbon (BC) is a key factor in global climate models and is impacted by brown carbon (BrC) and the lensing effect of coatings. We conducted an in-depth field study on for ambient aerosols at a monitoring point in Shanghai, China, by real-time aerosol optical property monitoring and high-performance liquid chromatography/diode array detector/quadrupole-time-of-flight mass spectrometry (HPLC/DAD/Q-ToF-MS) analysis. The results showed at λ = 530 nm caused by the lensing effect was about 1. Read More

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December 2020

Formation of Fe(III)-phosphonate Coatings on Barium Hexaferrite Nanoplatelets for Porous Nanomagnets.

ACS Omega 2020 Jun 4;5(23):14086-14095. Epub 2020 Jun 4.

Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.

Amorphous coatings formed with mono-, di-, and tetra-phosphonic acids on barium hexaferrite (BHF) nanoplatelets using various synthesis conditions. The coatings, synthesized in water with di- or tetra-phosphonic acids, were thicker than that could be expected from the ligand size and the surface coverage, as determined by thermogravimetric analysis. Here, we propose a mechanism for coating formation based on direct evidence of the surface dissolution/precipitation of the BHF nanoplatelets. Read More

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Immobilizing magnetite onto quartz sand for chromium remediation.

J Hazard Mater 2020 12 11;400:123139. Epub 2020 Jun 11.

Geomicrobiology, Center for Applied Geosciences, University of Tübingen, Tübingen 72074, Germany; School of Earth Sciences, University of Bristol, Queens Road, Bristol, BS8 1QU, UK. Electronic address:

Magnetite nanoparticles are often promoted as remediation agents for heavy metals such as chromium due to their reactivity and high surface area. However, their small size also makes them highly mobile increasing the risk that reacted pollutants will be transported to different locations rather than being safely controlled. Released to aquatic environments, aggregation leads to a loss of their nano-specific properties and contaminant-removal capacity. Read More

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December 2020

In Situ Catalysis and Extraction Approach for Fast Evaluation of Heterogeneous Catalytic Efficiency.

Anal Chem 2020 07 6;92(14):9989-9996. Epub 2020 Jul 6.

College of Science, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China.

In situ monitoring of products generated by important heterogeneous catalytic reactions is of great significance for chemical industry, particularly when the products or intermediates are not sufficiently stable or occur at trace-level concentrations. It is therefore highly desirable to develop an integrated in situ catalysis and extraction method, which can simultaneously catalyze the reaction and enrich products while maintaining compatibility with analytical instrumentation. Herein, we propose an approach by depositing different types of metal nanocrystals, including gold, platinum, and palladium nanoparticles, onto fibrous silica microspheres coated fibers for integrated in situ catalysis and extraction. Read More

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Mineral Materials Coated with and Consisting of MnO-Characteristics and Application of Filter Media for Groundwater Treatment: A Review.

Materials (Basel) 2020 May 13;13(10). Epub 2020 May 13.

Department of Water Supply, Water Disposal and Drilling Engineering, National University of Water and Environmental Engineering, 11 Soborna st., 33028 Rivne, Ukraine.

For groundwater treatment, the technologies involving oxidation on MnO filter bed are beneficial, common, and effectively used. The presence of MnO is the mutual feature of filter media, both MnO-coated mineral materials like quartz sand and gravel, chalcedonite, diatomite, glauconite, zeolite, or anthracite along with consisting of MnO manganese ores. This review is based on the analysis of research and review papers, commercial data sheets, and standards. Read More

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Antifouling Polymer Brushes via Oxygen-Tolerant Surface-Initiated PET-RAFT.

Langmuir 2020 04 15;36(16):4439-4446. Epub 2020 Apr 15.

Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands.

This work presents a new method for the synthesis of antifouling polymer brushes using surface-initiated photoinduced electron transfer-reversible addition-fragmentation chain-transfer polymerization with eosin Y and triethanolamine as catalysts. This method proceeds in an aqueous environment under atmospheric conditions without any prior degassing and without the use of heavy metal catalysts. The versatility of the method is shown by using three chemically different monomers: oligo(ethylene glycol) methacrylate, -(2-hydroxypropyl)methacrylamide, and carboxybetaine methacrylamide. Read More

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Prospective impacts of oil spills on floodplain vegetation: Both crude oil and diluted bitumen increase foliar temperatures, senescence and abscission in three cottonwood (Populus) species.

PLoS One 2020 27;15(3):e0230630. Epub 2020 Mar 27.

Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada.

Oil pipelines are vulnerable at river crossings since floods can expose and rupture pipes, releasing oil that floats and coats floodplain vegetation. This study investigated the consequences of oil coatings on leaves of cottonwoods (riparian poplars), the predominant trees in floodplain woodlands around the Northern Hemisphere. The study compared conventional crude oil (CO) versus diluted bitumen (dilbit, DB), heavy oil originating from the Alberta oil sands; with petroleum jelly (PJ) as a reference. Read More

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Mass transfer between microbubbles.

J Colloid Interface Sci 2020 Jul 2;571:253-259. Epub 2020 Mar 2.

Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia. Electronic address:

Hypothesis: The role of interfacial coatings in gas transport dynamics in foam coarsening is often difficult to quantify. The complexity of foam coarsening measurements or gas transport measurements between bubbles requires assumptions about the liquid thin film thickness profile in order to explore the effects of interfacial coatings on gas transport. It should be possible to independently quantify the effects from changes in film thickness and interfacial permeability by using both atomic force microscopy and optical microscopy to obtain time snapshots of this dynamic process. Read More

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Development of Photocatalytic Coatings by Thermal Hydrolysis of TiCl on Ceramic Roofing Tiles Made from Ferroalumina and Evaluation of De-Pollution Properties.

Materials (Basel) 2020 Jan 30;13(3). Epub 2020 Jan 30.

Department of Chemical Engineering, University of Patras, Caratheodori 1, 26504 Patras, Greece.

The development of new, environmental friendly building materials with photocatalytic properties remain still on the top of the investigations both for academy and industry. The main drive is the increasing air pollution and the greenhouse gas emissions that have negative effect on public health and buildings. Ceramic roofing tiles functionalized with TiO can contribute on tackling these severe environmental problems by improving their properties. Read More

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January 2020

Polypyrrole-Wrapped Carbon Nanotube Composite Films Coated on Diazonium-Modified Flexible ITO Sheets for the Electroanalysis of Heavy Metal Ions.

Sensors (Basel) 2020 Jan 21;20(3). Epub 2020 Jan 21.

University Paris Est Creteil, CNRS, ICMPE, UMR7182, F-94320 Thiais, France.

Highly sensitive multicomponent materials designed for the recognition of hazardous compounds request control over interfacial chemistry. The latter is a key parameter in the construction of the sensing (macro) molecular architectures. In this work, multi-walled carbon nanotubes (CNTs) were deposited on diazonium-modified, flexible indium tin oxide (ITO) electrodes prior to the electropolymerization of pyrrole. Read More

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January 2020

Geochemical distribution of selected elements in flotation tailings and soils/sediments from the dam spill at the abandoned antimony mine Stolice, Serbia.

Environ Sci Pollut Res Int 2020 Feb 21;27(6):6253-6268. Epub 2019 Dec 21.

University of Belgrade, Institute of Chemistry, Metallurgy and Technology, Njegoševa 12, Belgrade, 11000, Serbia.

Materials held within mine tailings pose a serious risk to the environment in cases of tailings dam failure. Collapse of the tailing dam at the Stolice antimony mine in West Serbia caused a spilling of tailing slurry into the nearby river watersheds. Medium-term effects of As, Pb, Sb, Zn, and Cd from the tailings material that remained in the flooded zone 3 years after the initial exposure were evaluated. Read More

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February 2020

Terahertz Time-Domain Reconstruction of Coating Microstratigraphy on Gilded Surfaces.

Materials (Basel) 2019 Nov 21;12(23). Epub 2019 Nov 21.

Istituto di Fisica Applicata "Nello Carrara", Consiglio Nazionale delle Ricerche, v. M. del Piano 10, 50019 Sesto Fiorentino (FI), Italy.

Here, a systematic study in order to assess the potential of THz time domain reflectometry for measuring the thicknesses of overpaint layers applied on original gilded surfaces was carried out. The work is part of a thorough characterization campaign, which is going on at the Rijksmuseum for addressing the conservation problems of a set of 19th century gilded picture frames on which heavy coatings were applied in previous undocumented restoration interventions. To perform such non-invasive thickness measurements, an analytical protocol based on Gaussian fits of the THz pulse-echo temporal profiles was optimized through the preparation of suitable technical samples and the comparison with direct thickness measurements. Read More

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November 2019

Understanding the microstructural evolution and mechanical properties of transparent Al-O-N and Al-Si-O-N films.

Sci Technol Adv Mater 2019 25;20(1):1031-1042. Epub 2019 Sep 25.

Laboratory for Nanoscale Materials Science, Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland.

Optically transparent, colorless Al-O-N and Al-Si-O-N coatings with discretely varied O and Si contents were fabricated by reactive direct current magnetron sputtering (R-DCMS) from elemental Al and Si targets and O and N reactive gases. The Si/Al content was adjusted through the electrical power on the Si and Al targets, while the O/N content was controlled through the O flow piped to the substrate in addition to the N flow at the targets. The structure and morphology of the coatings were studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM), while the elemental composition was obtained from Rutherford backscattering spectrometry (RBS) and heavy ion elastic recoil detection analysis (ERDA). Read More

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September 2019

Antibacterial Effect of Au Implantation in Ductile Nanocomposite Multilayer (TiAlSiY)N/CrN Coatings.

ACS Appl Mater Interfaces 2019 Dec 16;11(51):48540-48550. Epub 2019 Dec 16.

Tele and Radio Research Institute , 11, Ratuszowa st. , 03-450 Warsaw , Poland.

A multilayered nanocomposite designed for biomedical applications based on (TiAlSiY)N/CrN coating implanted by heavy Au ions is studied. Ion irradiation produced formation in the upper-surface of local amorphous clusters. The obtained composite system was characterized by SEM-EDS, RBS, SIMS, HRTEM, STEM, and nanoindentation mechanical tests, inspecting microstructure, phase state, elemental composition and surface defectiveness. Read More

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December 2019

Review of Cadmium Pollution in Bangladesh.

J Health Pollut 2019 Sep 22;9(23):190913. Epub 2019 Aug 22.

Department of Environmental Science, Stamford University Bangladesh, Dhaka, Bangladesh.

Background: Exposure to cadmium (Cd) is a global public health concern. The primary Cd exposure pathways are inhalation and ingestion. Globally, Cd production and consumption has increased, along with nickel-cadmium battery production, alloys, anticorrosive coatings, pigments, polyvinyl chloride stabilizers, semiconductors for solar cells, etc. Read More

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September 2019

Design of Small Nanoparticles Decorated with Amphiphilic Ligands: Self-Preservation Effect and Translocation into a Plasma Membrane.

ACS Appl Mater Interfaces 2019 Jul 28;11(27):23822-23831. Epub 2019 Jun 28.

State Key Laboratory of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing 100029 , China.

Design of nanoparticles (NPs) for biomedical applications requires a thorough understanding of cascades of nano-bio interactions at different interfaces. Here, we take into account the cascading effect of NP functionalization on interactions with target cell membranes by determining coatings of biomolecules in biological media. Cell culture experiments show that NPs with more hydrophobic surfaces are heavily ingested by cells in both the A549 and HEK293 cell lines. Read More

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