Classification and application of metal-based nanoantioxidants in medicine and healthcare

• Nguyen Nhat Nam,
• Nguyen Khoi Song Tran,
• Tan Tai Nguyen,
• Nguyen Ngoc Trai,
• Nguyen Phuong Thuy,
• Hoang Dang Khoa Do,
• Nhu Hoa Thi Tran and
• Kieu The Loan Trinh

Beilstein J. Nanotechnol. 2024, 15, 396–415, doi:10.3762/bjnano.15.36

• stability of CAT-mimicking nanomaterials. For example, ceria nanoparticles maintained a relative activity of approximately 100% at 20–70 °C, while natural CAT showed a significant decrease in relative activity at over 40 °C [38]. The decrease of catalytic activity of natural CAT at temperatures above 40 °C

Carboxylic acids and light interact to affect nanoceria stability and dissolution in acidic aqueous environments

• Matthew L. Hancock,
• Eric A. Grulke and
• Robert A. Yokel

Beilstein J. Nanotechnol. 2023, 14, 762–780, doi:10.3762/bjnano.14.63

• did not occur in the dark in the presence of most carboxylic acids. Light initiates free radicals generated by ceria nanoparticles. Nanoceria completely dissolved in the presence of citric, malic, and isocitric acid when exposed to light, attributed to nanoceria dissolution, release of Ce3+ ions, and

• percentage of cerium carboxylates in the shoots in the absence of added phosphate [18]. Nanoceria can be taken up by food crops; however, limited biotransformation was observed in soil cultivated soybeans [19]. Coated and uncoated ceria nanoparticles were found in the roots and shoots of corn plants. The

• ]. When exposed to artificial sunlight, ceria nanoparticles produced hydroxy radicals and induced lipid peroxidation of the gills of cardinal tetra, a native species of the Rio Negro region [45]. The citric acid coating can also be altered by UV irradiation. Photolysis of citric acid under a Hg lamp

Ceria/polymer nanocontainers for high-performance encapsulation of fluorophores

• Kartheek Katta,
• Dmitry Busko,
• Yuri Avlasevich,
• Katharina Landfester,
• Stanislav Baluschev and
• Rafael Muñoz-Espí

Beilstein J. Nanotechnol. 2019, 10, 522–530, doi:10.3762/bjnano.10.53

• TEM images presented in Figure 2 demonstrate that the inorganic ceria nanoparticles were efficiently crystallized on the surface (Figure 2a,b shows the pristine sample NC and Figure 2c,d shows the hybrid sample, labeled as NC-CeO2). The X-ray diffraction (XRD) pattern of the hybrid sample, shown in

In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

• Jingxia Yang,
• Johannes Ofner,
• Bernhard Lendl and
• Ulrich Schubert

Beilstein J. Nanotechnol. 2016, 7, 1815–1821, doi:10.3762/bjnano.7.174

• Shanghai, P. R. China Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, 1060 Wien, Austria 10.3762/bjnano.7.174 Abstract Raman and IR investigations indicated the presence of reduced graphene oxide (rGO)-like residues on ceria nanoparticles after

• gels proved to be crucial for the specific surface area, the Ce3+ proportion and, as a consequence, the CO oxidation activity of the obtained materials, which were composed of 3.5–5.5 nm ceria nanoparticles. CeO2 solvothermally treated with EtOH had the highest surface area and showed better CO

Morphology, structural properties and reducibility of size-selected CeO_2−x nanoparticle films

• Maria Chiara Spadaro,
• Sergio D’Addato,
• Gabriele Gasperi,
• Francesco Benedetti,
• Paola Luches,
• Vincenzo Grillo,
• Giovanni Bertoni and
• Sergio Valeri

Beilstein J. Nanotechnol. 2015, 6, 60–67, doi:10.3762/bjnano.6.7

• , Parco Area delle Scienze 37/A - 43124 Parma, Italy 10.3762/bjnano.6.7 Abstract Non-stoichiometric ceria nanoparticles (NPs) were obtained by a gas aggregation source with a magnetron and were mass-selected with a quadrupole mass filter. By varying magnetron power, Ar gas flow, and the length of the

• : CeO2 ultra-thin films; ceria nanoparticles; magnetron sputtering; reduction and oxidation; size-dependent properties; size-selected nanoparticles; X-ray photoelectron spectroscopy; Introduction The main property of cerium oxide that attracts scientific attention is its ability to store and release

Synthesis and characterization of fluorescence-labelled silica core-shell and noble metal-decorated ceria nanoparticles

• Rudolf Herrmann,
• Markus Rennhak and
• Armin Reller

Beilstein J. Nanotechnol. 2014, 5, 2413–2423, doi:10.3762/bjnano.5.251

• and characterization of fluorescent silica and ceria nanoparticles. Synthetic methods for labelling of silica and polyorganosiloxane/silica core–shell nanoparticles with perylenediimide derivatives are described, as well as the modification of the shell with thiol groups. Photometric methods for the

• determination of the number of thiol groups and an estimate for the number of fluorescent molecules per nanoparticles, including a scattering correction, have been developed. Ceria nanoparticles decorated with noble metals (Pt, Pd, Rh) are models for the decomposition products of automobile catalytic converters

• which appear in the exhaust gases and finally interact with biological systems including humans. The control of the degree of agglomeration of small ceria nanoparticles is the basis for their synthesis. Almost monodisperse agglomerates (40 ± 4–260 ± 40 nm diameter) can be prepared and decorated with

Precise quantification of silica and ceria nanoparticle uptake revealed by 3D fluorescence microscopy

• Adriano A. Torrano and
• Christoph Bräuchle

Beilstein J. Nanotechnol. 2014, 5, 1616–1624, doi:10.3762/bjnano.5.173

• derived from the cervix carcinoma (HeLa). The absolute number of intracellular silica nanoparticles within the first 24 h was determined and shown to be cell type-dependent. As a second case study, Particle_in_Cell-3D was used to assess the uptake kinetics of 8 nm and 30 nm ceria nanoparticles interacting

• unusual uptake behavior could be cell division. Keywords: ceria nanoparticles; fluorescence microscopy; image analysis; nanotoxicology; silica nanoparticles; Introduction Measuring the interaction between nanoparticles and cells is a mandatory step for the investigation of nanoparticles designed for

• automatic image analysis. This method is called Particle_in_Cell-3D and was described in detail in a previous publication [5]. In this work we briefly describe Particle_in_Cell-3D and present how it was successfully applied to precisely quantify the cellular uptake of silica and ceria nanoparticles. Silica

Nanostructure sensitization of transition metal oxides for visible-light photocatalysis

• Hongjun Chen and
• Lianzhou Wang

Beilstein J. Nanotechnol. 2014, 5, 696–710, doi:10.3762/bjnano.5.82

• Figure 5. The phenomenon of plasmon-enhanced photocatalysis was also successively discussed by other groups. For example, Primo et al. reported that 1 wt % gold-supported ceria nanoparticles generated oxygen from water under visible light (λ > 400 nm) more efficiently than the standard WO3 under UV

Template-assisted formation of microsized nanocrystalline CeO₂ tubes and their catalytic performance in the carboxylation of methanol

• Jörg J. Schneider,
• Meike Naumann,
• Christian Schäfer,
• Armin Brandner,
• Heiko J. Hofmann and
• Peter Claus

Beilstein J. Nanotechnol. 2011, 2, 776–784, doi:10.3762/bjnano.2.86

• shows the XRD spectrum of such ceria nanoparticles [22]. The spectrum indicates a phase-pure face-centred-cubic fluorite-type CeO2 (JCPDS 78-0694, No. 225). No other phases or impurities were detected. Formation of ceria tubes with surfactant Pluronic P123® To further improve the intimate contact

Ceria/silicon carbide core–shell materials prepared by miniemulsion technique

• Lars Borchardt,
• Martin Oschatz,
• Robert Frind,
• Emanuel Kockrick,
• Martin R. Lohe,
• Christoph P. Hauser,
• Clemens K. Weiss,
• Katharina Landfester,
• Bernd Büchner and
• Stefan Kaskel

Beilstein J. Nanotechnol. 2011, 2, 638–644, doi:10.3762/bjnano.2.67

• the unloaded Si(O)C shell particles were chosen. The results of the TPO measurements are presented in Figure 7. The onset temperatures for pure ceria nanoparticles and the unloaded particles, representing the uncatalyzed reaction, are 758 K and 1130 K, respectively [38]. The investigated ceria

• modified Si(O)C spheres show catalytic activity for the combustion of methane. The onset temperatures for SiC/CeO2 and SiC-Acr/CeO2 are 1018 K and 868 K, respectively. In comparison to the ceria nanoparticles the activity is lower due to the smaller amount of active material in the sample. Although SiC-Acr