Phys Chem Chem Phys
Instituto de Química, Universidade Federal do Rio Grande do Norte - Campus Universitário - Lagoa Nova, 59072-970, Natal, RN, Brazil.
Published: November 2013
Hybrid materials with enhanced properties can now be obtained by combining nanomaterials such as carbon nanotubes and metallic nanoparticles, where the main challenge is to control fabrication conditions. In this study, we demonstrate that platinum nanoparticles (PtNps) can be electrogenerated within layer-by-layer (LbL) films of polyamidoamine (PAMAM) dendrimers and single-walled carbon nanotubes (SWCNTs), which serve as stabilizing matrices. The advantages of the possible control through electrogeneration were demonstrated with a homogeneous distribution of PtNps over the entire surface of the PAMAM/SWCNT LbL films, whose electroactive sites could be mapped using magnetic force microscopy. The Pt-containing films were used as catalysts for hydrogen peroxide reduction, with a decrease in the reduction potential of 60 mV compared to a Pt film deposited onto bare ITO. By analyzing the mechanisms responsible for hydrogen peroxide reduction, we ascribed the enhanced catalytic activity to synergistic effects between platinum and carbon in the LbL films, which are promising for sensing and fuel cell applications.
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http://dx.doi.org/10.1039/c3cp52707g | DOI Listing |
Phys Chem Chem Phys
January 2025
Department of Chemical Engineering, Ataturk University, 25240 Erzurum, Turkey.
The combination of plasmonic metals and MXene, as a new and interesting member of the 2D material class, may provide unique advantages in terms of low cost, versatility, flexibility, and improved activity as an ideal surface-enhanced Raman spectroscopy (SERS) platform. Despite the recent progress, the present studies on the utilization of plasmonic metal/MXene-based SERS systems are quite limited and thereby benefits of the extraordinary properties of this combination cannot be realized. In this study, for the first time, we propose layer-by-layer (LbL) thin films of TiC MXene and gold nanoparticles (AuNPs) as a robust SERS platform (TiC/AuNPs).
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University of California, Santa Barbara, Department of Chemical Engineering, Santa Barbara, CA 93106, USA; Joint BioEnergy Institute (JBEI), Emeryville, CA, 94608, United States. Electronic address:
Anaerobic gut fungi of the phylum Neocallimastigomycota are microbes proficient in valorizing low-cost but difficult-to-breakdown lignocellulosic plant biomass. Characterization of different fungal life stages and how they contribute to biomass breakdown are critical for biotechnological applications, yet we lack foundational knowledge about the transcriptional, metabolic, and enzyme secretion behavior of different life stages of anaerobic gut fungi: zoospores, germlings, immature thalli, and mature zoosporangia. A Miracloth-based technique was developed to enrich cell pellets with zoospores - the free-swimming, flagellated, young life stage of anaerobic gut fungi.
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December 2024
Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), Tsukuba, Japan.
Although the Diels-Alder reaction (DA) has garnered significant attention due to its numerous advantages, its long reaction time is a drawback. Herein, we investigated the effects of polarity difference on DA using Layer-by-Layer (LbL) films comprising polycationic polyallylamine hydrochloride and polyanionic poly (styrenesulfonic acid-co-furfuryl methacrylate) [poly (SS--FMA)] as the reaction environment. First, furan composition in poly (SS--FMA) was adjusted to be 19 mol% to achieve good water solubility and layer deposition.
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January 2025
CICECO ─ Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago 3810-193, Aveiro, Portugal.
Silk sericin (SS) has been widely discarded as a waste by the silk textile industry during the degumming process to obtain fibroin. However, in the past decade, an in-depth understanding of its properties and functions turned it into a high added-value biomaterial for biomedical applications. Herein, we report the molecular design and development of sustainable supramolecular multilayered nanobiomaterials encompassing SS and oppositely charged chitosan (CHT) through a combination of self-assembly and electrostatically driven layer-by-layer (LbL) assembly technology.
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Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
Cobalt is an efficient catalyst for Fischer-Tropsch synthesis (FTS) of hydrocarbons from syngas (CO + H) with enhanced selectivity for long-chain hydrocarbons when promoted by Manganese. However, the molecular scale origin of the enhancement remains unclear. Here we present an experimental and theoretical study using model catalysts consisting of crystalline CoMnO nanoparticles and thin films, where Co and Mn are mixed at the sub-nm scale.
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