5,007 results match your criteria nanomaterials possess

Carbon nanomaterial hybrids via laser writing for high-performance non-enzymatic electrochemical sensors: a critical review.

Anal Bioanal Chem 2021 May 12. Epub 2021 May 12.

Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93053, Regensburg, Germany.

Non-enzymatic electrochemical sensors possess superior stability and affordability in comparison to natural enzyme-based counterparts. A large variety of nanomaterials have been introduced as enzyme mimicking with appreciable sensitivity and detection limit for various analytes of which glucose and HO have been mostly investigated. The nanomaterials made from noble metal, non-noble metal, and metal composites, as well as carbon and their derivatives in various architectures, have been extensively proposed over the past years. Read More

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Regulating coordination number in atomically dispersed Pt species on defect-rich graphene for n-butane dehydrogenation reaction.

Nat Commun 2021 May 11;12(1):2664. Epub 2021 May 11.

Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing, P. R. China.

Metal nanoparticle (NP), cluster and isolated metal atom (or single atom, SA) exhibit different catalytic performance in heterogeneous catalysis originating from their distinct nanostructures. To maximize atom efficiency and boost activity for catalysis, the construction of structure-performance relationship provides an effective way at the atomic level. Here, we successfully fabricate fully exposed Pt clusters on the defective nanodiamond@graphene (ND@G) by the assistance of atomically dispersed Sn promoters, and correlated the n-butane direct dehydrogenation (DDH) activity with the average coordination number (CN) of Pt-Pt bond in Pt NP, Pt cluster and Pt SA for fundamentally understanding structure (especially the sub-nano structure) effects on n-butane DDH reaction at the atomic level. Read More

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Recent progress in drug delivery and cancer theranostic built from metal-organic frameworks.

Biomed Mater 2021 May 11. Epub 2021 May 11.

Xidian University, Shaanxi, Xi'an, China, Xian, 710071, CHINA.

With the improvement of living standards, cancer has become a great challenge around the world during last decades, meanwhile, abundant nanomaterials have been developed as drug delivery system (DDS) or cancer theranostic agents (CTA) with their outstanding properties. However, low multifunctional efficiency and time-consuming synthesis limit their further applications. Nowadays, green chemistry, in particular, the concept of atom economy, has defined new criteria for the simplicity and efficient production of biomaterials for nanomedicine, which not only owns the property of spatio-temporal precision imaging, but also possess the ability to treat cancer. Read More

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Developmental, cellular, and biochemical basis of transparency in clearwing butterflies.

J Exp Biol 2021 May 10. Epub 2021 May 10.

Department Integrative Biology, University of California Berkeley, Berkeley, CA 94720, USA.

The wings of butterflies and moths (Lepidoptera) are typically covered with thousands of flat, overlapping scales that endow the wings with colorful patterns. Yet, numerous species of Lepidoptera have evolved highly transparent wings, which often possess scales of altered morphology and reduced size, and the presence of membrane surface nanostructures that dramatically reduce reflection. Optical properties and anti-reflective nanostructures have been characterized for several 'clearwing' Lepidoptera, but the developmental processes underlying wing transparency are unknown. Read More

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Induced Autophagy of Macrophages and the Regulation of Inflammatory Effects by Perovskite Nanomaterial LaNiO.

Front Immunol 2021 22;12:676773. Epub 2021 Apr 22.

CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety & CAS-HKU Joint Laboratory of Metallomics on Health and Environment, and Beijing Metallomics Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.

Perovskite nanomaterials (NMs) possess excellent physicochemical properties and have promising applications in light-emitting diodes (LEDs), lasers, photodetectors, and artificial synapse electronics. Potential exposure to these NMs happens in the manufacture and application of the perovskite-based products, however, the biological safety of these NMs is still unknown. Here, we used the LaNiO NM (LNO), a typical kind of perovskite nanostructures to study the interaction with macrophages (J774A. Read More

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Near-Infrared absorbing J-Aggregates of boron dipyrromethene for high efficient photothermal therapy.

J Colloid Interface Sci 2021 Apr 24;599:476-483. Epub 2021 Apr 24.

School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun, Jilin 130012, PR China. Electronic address:

Constructing bioactive materials remains a big challenge through the aggregates of molecules. Herein, a boron dipyrromethene (BODIPY) derivative containing three nitro groups (BDP-(NO)) was synthesized, which displays the characteristic of J-aggregate with pronounced red-shifted absorption in nonpolar solvent and aqueous media. The bathochromic shift from 635 to 765 nm facilitates photothermal transition upon the irradiation of near-infrared (NIR) light. Read More

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Electrospun cobalt Prussian blue analogue-derived nanofibers for oxygen reduction reaction and lithium-ion batteries.

J Colloid Interface Sci 2021 Apr 21;599:280-290. Epub 2021 Apr 21.

School of Applied Physics and Materials, Wuyi University, Jiangmen, China; Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan, China. Electronic address:

Electrospinning is an effective technique to fabricate one-dimensional materials. In this study, cobalt-embedded carbon nanofibers (Co@CNFs) are obtained via carbonization of electrospun cobalt Prussian blue analogue (Co-Co PBA) under nitrogen atmosphere. The Co@CNFs have metallic cobalt surrounded by graphitic carbon shells and possess high specific surface area, rich porosity, high graphitic degree, and rational nitrogen doping. Read More

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A window-space-directed assembly strategy for the construction of supertetrahedron-based zeolitic mesoporous metal-organic frameworks with ultramicroporous apertures for selective gas adsorption.

Chem Sci 2021 Mar 5;12(16):5767-5773. Epub 2021 Mar 5.

Department of Chemistry, University of North Texas Denton 76201 USA

Despite their scarcity due to synthetic challenges, supertetrahedron-based metal-organic frameworks (MOFs) possess intriguing architectures, diverse functionalities, and superb properties that make them in-demand materials. Employing a new window-space-directed assembly strategy, a family of mesoporous zeolitic MOFs have been constructed herein from corner-shared supertetrahedra based on homometallic or heterometallic trimers [M(OH/O)(COO)] (M = Co, Ni or CoTi). These MOFs consisted of close-packed truncated octahedral cages possessing a sodalite topology and large β-cavity mesoporous cages (∼22 Å diameter) connected by ultramicroporous apertures (∼5. Read More

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Thermal Transport Evolution Due to Nanostructural Transformations in Ga-Doped Indium-Tin-Oxide Thin Films.

Nanomaterials (Basel) 2021 Apr 27;11(5). Epub 2021 Apr 27.

E. Pokatilov Laboratory of Physics and Engineering of Nanomaterials, Department of Physics and Engineering, Moldova State University, MD-2009 Chisinau, Moldova.

We report on a comprehensive theoretical and experimental investigation of thermal conductivity in indium-tin-oxide (ITO) thin films with various Ga concentrations (0-30 at. %) deposited by spray pyrolysis technique. X-ray diffraction (XRD) and scanning electron microscopy have shown a structural transformation in the range 15-20 at. Read More

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Organotrialkoxysilane-Functionalized Prussian Blue Nanoparticles-Mediated Fluorescence Sensing of Arsenic(III).

Nanomaterials (Basel) 2021 Apr 28;11(5). Epub 2021 Apr 28.

Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC 27599, USA.

Prussian blue nanoparticles (PBN) exhibit selective fluorescence quenching behavior with heavy metal ions; in addition, they possess characteristic oxidant properties both for liquid-liquid and liquid-solid interface catalysis. Here, we propose to study the detection and efficient removal of toxic arsenic(III) species by materializing these dual functions of PBN. A sophisticated PBN-sensitized fluorometric switching system for dosage-dependent detection of As along with PBN-integrated SiO platforms as a column adsorbent for biphasic oxidation and elimination of As have been developed. Read More

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Prospects of Polymeric Nanofibers Loaded with Essential Oils for Biomedical and Food-Packaging Applications.

Int J Mol Sci 2021 Apr 13;22(8). Epub 2021 Apr 13.

Department of Nanotechnology, University of Kashmir Hazratbal, Srinagar 190006, Jammu and Kashmir, India.

Essential oils prevent superbug formation, which is mainly caused by the continuous use of synthetic drugs. This is a significant threat to health, the environment, and food safety. Plant extracts in the form of essential oils are good enough to destroy pests and fight bacterial infections in animals and humans. Read More

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Multifunctional Magneto-Plasmonic FeO/Au Nanocomposites: Approaching Magnetophoretically-Enhanced Photothermal Therapy.

Nanomaterials (Basel) 2021 Apr 25;11(5). Epub 2021 Apr 25.

College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.

Magneto-plasmonic nanocomposites can possess properties inherent to both individual components (iron oxide and gold nanoparticles) and are reported to demonstrate high potential in targeted drug delivery and therapy. Herein, we report on FeO/Au magneto-plasmonic nanocomposites (MPNC) synthesized with the use of amino acid tryptophan via chemical and photochemical reduction of Au ions in the presence of nanosized magnetite. The magnetic field (MF) induced aggregation was accompanied by an increase in the absorption in the near-infrared (NIR) spectral region, which was demonstrated to provide an enhanced photothermal (PT) effect under NIR laser irradiation (at 808 nm). Read More

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Graphene-Based Nanomaterials as the Cathode for Lithium-Sulfur Batteries.

Molecules 2021 Apr 25;26(9). Epub 2021 Apr 25.

School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255049, China.

The global energy crisis and environmental problems are becoming increasingly serious. It is now urgent to vigorously develop an efficient energy storage system. Lithium-sulfur batteries (LSBs) are considered to be one of the most promising candidates for next-generation energy storage systems due to their high energy density. Read More

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Superhydrophobic Nanocoatings as Intervention against Biofilm-Associated Bacterial Infections.

Nanomaterials (Basel) 2021 Apr 19;11(4). Epub 2021 Apr 19.

Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University (IMU), Bukit Jalil, Kuala Lumpur 57000, Malaysia.

Biofilm formation represents a significant cause of concern as it has been associated with increased morbidity and mortality, thereby imposing a huge burden on public healthcare system throughout the world. As biofilms are usually resistant to various conventional antimicrobial interventions, they may result in severe and persistent infections, which necessitates the development of novel therapeutic strategies to combat biofilm-based infections. Physicochemical modification of the biomaterials utilized in medical devices to mitigate initial microbial attachment has been proposed as a promising strategy in combating polymicrobial infections, as the adhesion of microorganisms is typically the first step for the formation of biofilms. Read More

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ALD Deposited ZnO:Al Films on Mica for Flexible PDLC Devices.

Nanomaterials (Basel) 2021 Apr 15;11(4). Epub 2021 Apr 15.

Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.

In this work, highly conductive Al-doped ZnO (AZO) films are deposited on transparent and flexible muscovite mica substrates by using the atomic layer deposition (ALD) technique. AZO-mica structures possess high optical transmittance at visible and near-infrared spectral range and retain low electric resistivity, even after continuous bending of up to 800 cycles. Structure performances after bending tests have been supported by atomic force microscopy (AFM) analysis. Read More

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Insights into Terminal Sterilization Processes of Nanoparticles for Biomedical Applications.

Molecules 2021 Apr 3;26(7). Epub 2021 Apr 3.

Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico.

Nanoparticles possess a huge potential to be employed in numerous biomedical purposes; their applications may include drug delivery systems, gene therapy, and tissue engineering. However, the in vivo use in biomedical applications requires that nanoparticles exhibit sterility. Thus, diverse sterilization techniques have been developed to remove or destroy microbial contamination. Read More

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Degradations of endocrine-disrupting chemicals and pharmaceutical compounds in wastewater with carbon-based nanomaterials: a critical review.

Environ Sci Pollut Res Int 2021 Apr 28. Epub 2021 Apr 28.

Department of Environmental Science, PGDAV College, University of Delhi, New Delhi, 110067, India.

Although water occupies 75% of the earth's surface, only 0.0067% of the total water is available for human activities. These statistics further decline with the population growth and consequent multiplication in the amount of annual waste produced. Read More

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Bacterial extracellular electron transfer: a powerful route to the green biosynthesis of inorganic nanomaterials for multifunctional applications.

J Nanobiotechnology 2021 Apr 27;19(1):120. Epub 2021 Apr 27.

Nanchang Key Laboratory of Microbial Resources Exploitation & Utilization From Poyang Lake Wetland, College of Life Sciences, Jiangxi Normal University, Nanchang, 330022, China.

Synthesis of inorganic nanomaterials such as metal nanoparticles (MNPs) using various biological entities as smart nanofactories has emerged as one of the foremost scientific endeavors in recent years. The biosynthesis process is environmentally friendly, cost-effective and easy to be scaled up, and can also bring neat features to products such as high dispersity and biocompatibility. However, the biomanufacturing of inorganic nanomaterials is still at the trial-and-error stage due to the lack of understanding for underlying mechanism. Read More

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Fabrication of acid-resistant imprinted layer on magnetic nanomaterials for selective extraction of chlorogenic acid in Honeysuckle.

Anal Chim Acta 2021 May 5;1161:338475. Epub 2021 Apr 5.

School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China.

The common elution process of molecularly imprinted polymers (MIPs) is carried out in an acidic medium, which greatly affects the stability and reusability of synthetic MIPs, especially for magnetic MIPs. In this study, we fabricated an acid-resistant imprinted layer formed by phase-transitioned lysozyme on magnetic nanomaterials for selective extraction of chlorogenic acid in Honeysuckle, which often coexists with structural analogs. The newly designed acid-resistant imprinted layer can not only protect the internal magnetic core from denudation and dissolution, but also maintain the integrity of the imprinted layer during the elution process. Read More

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Trends in targeted delivery of nanomaterials in colon cancer diagnosis and treatment.

Med Res Rev 2021 Apr 23. Epub 2021 Apr 23.

College of Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.

Colon cancer is an adenocarcinoma, which subsequently develops into malignant tumors, if not treated properly. The current colon cancer therapy mainly revolves around chemotherapy, radiotherapy and surgery, but the search continues for more effective interventions. With the advancement of nanoparticles (NPs), it is now possible to diagnose and treat colon cancers with different types, shapes, and sizes of NPs. Read More

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Reactive oxygen species: the root cause of nanoparticle-induced toxicity in .

Free Radic Res 2021 Apr 20:1-17. Epub 2021 Apr 20.

Neural Developmental Biology Lab, Department of Life Science, National Institute of Technology, Rourkela, Odisha, India.

Nanotechnology is a rapidly developing technology in the twenty-first century. Nanomaterials are extensively used in numerous industries including cosmetics, food, medicines, industries, agriculture, etc. Along with its wide application toxicity is also reported from studies of various model organisms including . Read More

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Lewis acidic zinc(II) salen-type Schiff-base complexes: sensing properties and responsive nanostructures.

Santo Di Bella

Dalton Trans 2021 May;50(18):6050-6063

Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.

In this frontier article some peculiar characteristics of Zn(salen)-type Schiff-base complexes are reviewed. The paper is mainly focused on the most recent and relevant achievements on responsive supramolecular nanostructures and sensing properties, both of them related to the Lewis acidic character of the ZnII centre in these molecular species, providing an interpretation of these features. The sensing properties of Zn(salen)-type complexes mainly originate from optical spectroscopic changes associated with the formation of the adducts upon addition of a Lewis base (analyte), either by deaggregation of dimeric species or displacement of the solvent coordinated to the metal centre. Read More

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Carbon Nanomaterials With Hollow Structures: A Mini-Review.

Front Chem 2021 30;9:668336. Epub 2021 Mar 30.

Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, China.

Carbon nanomaterials with high electrical conductivity, good chemical, and mechanical stability have attracted increasing attentions and shown wide applications in recent years. In particularly, hollow carbon nanomaterials, which possess ultrahigh specific surface area, large surface-to-volume ratios, and controllable pore size distribution, will benefit to provide abundant active sites, and mass loading vacancy, accelerate electron/ion transfer as well as contribute to the specific density of energy storage systems. In this mini-review, we summarize the recent progresses of hollow carbon nanomaterials by focusing on the synthesis approaches and corresponding nanostructures, including template-free and hard-template carbon hollow structures, metal organic framework-based hollow carbon structures, bowl-like and cage-like structures, as well as hollow fibers. Read More

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Lerf-Klinowski-type models of graphene oxide and reduced graphene oxide are robust in analyzing non-covalent functionalization with porphyrins.

Sci Rep 2021 Apr 12;11(1):7977. Epub 2021 Apr 12.

Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.

Graphene-based nanohybrids are good candidates for various applications. However, graphene exhibits some unwanted features such as low solubility in an aqueous solution or tendency to aggregate, limiting its potential applications. On the contrary, its derivatives, such as graphene oxide (GO) and reduced graphene oxide (RGO), have excellent properties and can be easily produced in large quantities. Read More

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Graphene-Based Nanomaterials Modulate Internal Biofilm Interactions and Microbial Diversity.

Front Microbiol 2021 26;12:623853. Epub 2021 Mar 26.

Laboratoire d'écologie fonctionnelle et environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France.

Graphene-based nanomaterials (GBMs), such as graphene oxide (GO) and reduced graphene oxide (rGO), possess unique properties triggering high expectations for the development of new technological applications and are forecasted to be produced at industrial-scale. This raises the question of potential adverse outcomes on living organisms and especially toward microorganisms constituting the basis of the trophic chain in ecosystems. However, investigations on GBMs toxicity were performed on various microorganisms using single species that are helpful to determine toxicity mechanisms but fail to predict the consequences of the observed effects at a larger organization scale. Read More

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Large Area Patterning of Nanoparticles and Nanostructures: Current Status and Future Prospects.

ACS Nano 2021 Apr 8;15(4):5861-5875. Epub 2021 Apr 8.

Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany.

Nanoparticles possess exceptional optical, magnetic, electrical, and chemical properties. Several applications, ranging from surfaces for optical displays and electronic devices, to energy conversion, require large-area patterns of nanoparticles. Often, it is crucial to maintain a defined arrangement and spacing between nanoparticles to obtain a consistent and uniform surface response. Read More

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Yolk-Shelled Gold@Cuprous Oxide Nanostructures with Hot Carriers Boosting Photocatalytic Performance.

Langmuir 2021 Apr 8;37(15):4578-4586. Epub 2021 Apr 8.

Shanghai Key Laboratory of Molecular Imaging, Collaborative Innovation Center for Biomedicine, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China.

Plasmonic Au nanoparticles (NPs) have been commonly used to enhance the photocatalytic activity of CuO. Till now, core-shell Au NP@CuO composites have been reported in previous studies. Yet, these Au@CuO composites only exhibit visible light response. Read More

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Protein nanoparticles in molecular, cellular, and tissue imaging.

Wiley Interdiscip Rev Nanomed Nanobiotechnol 2021 Apr 5:e1714. Epub 2021 Apr 5.

School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore.

The quest to develop ideal nanoparticles capable of molecular, cellular, and tissue level imaging is ongoing. Since certain imaging probes and nanoparticles face drawbacks such as low aqueous solubility, increased ROS generation leading to DNA damage, apoptosis, and high cellular/organ toxicities, the development of versatile and biocompatible nanocarriers becomes necessary. Protein nanoparticles (PNPs) are one such promising class of nanocarriers that possess most of the desirable properties of an ideal nanocarrier for bioimaging applications. Read More

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Drug Targeting Platelet Membrane-Coated Nanoparticles.

Small Struct 2020 Oct 9;1(1). Epub 2020 Sep 9.

Departments of NanoEngineering, Chemical Engineering Program, and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA.

Platelets possess distinct surface moieties responsible for modulating their adhesion to various disease-relevant substrates involving vascular damage, immune evasion, and pathogen interactions. Such broad biointerfacing capabilities of platelets have inspired the development of platelet-mimicking drug carriers that preferentially target drug payloads to disease sites for enhanced therapeutic efficacy. Among these carriers, platelet membrane-coated nanoparticles (denoted 'PNPs') made by cloaking synthetic substrates with the plasma membrane of platelets have emerged recently. Read More

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October 2020

PLGA Based Nanospheres as a Potent Macrophage-Specific Drug Delivery System.

Nanomaterials (Basel) 2021 Mar 16;11(3). Epub 2021 Mar 16.

Department of Pharmaceutical Technology, Faculty of Pharmacy in Hradec Kralove, Charles University, Akademika Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.

Macrophages possess an innate ability to scavenge heterogenous objects from the systemic circulation and to regulate inflammatory diseases in various organs via cytokine production. That makes them attractive targets for nanomedicine-based therapeutic approaches to inflammatory diseases. In the present study, we have prepared several different poly(lactic-co-glycolic acid) (PLGA) polymer nanospheres for macrophage-targeted drug delivery using both nanoprecipitation and emulsification solvent evaporation methods. Read More

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