The effect of magneto-crystalline anisotropy on the properties of hard and soft magnetic ferrite nanoparticles

• Hajar Jalili,
• Bagher Aslibeiki,
• Ali Ghotbi Varzaneh and
• Volodymyr A. Chernenko

Beilstein J. Nanotechnol. 2019, 10, 1348–1359, doi:10.3762/bjnano.10.133

• anisotropy and magnetic interactions on properties of magnetic nanoparticles, in this work, a series of CoxFe3−xO4 (0 ≤ x ≤ 1) NPs was synthesized using a co-precipitation method. The effect of Co doping on the structural, magnetic and hyperthermia properties of CoxFe3−xO4 nanoparticles has been studied. We

• magnetization and particle size. Our results showed that the heat-generation efficiency is highly impacted by the magnetic anisotropy of the nanoparticles. Experimental Synthesis CoxFe3−xO4 nanoparticles were synthesized using a facile co-precipitation method at 80 °C in air. The chemical reaction can be

Green fabrication of lanthanide-doped hydroxide-based phosphors: Y(OH)₃:Eu³⁺ nanoparticles for white light generation

• Tugrul Guner,
• Anilcan Kus,
• Mehmet Ozcan,
• Aziz Genc,
• Hasan Sahin and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 1200–1210, doi:10.3762/bjnano.10.119

• methods have been widely used such as sol–gel, hydrothermal, combustion, emulsion, and precipitation methods [31][32][33][34]. Among those, the sol–gel and co-precipitation methods are, in general, slow and usually involve additional steps. On the other hand, there is a huge waste of organic solvents

Tailoring the magnetic properties of cobalt ferrite nanoparticles using the polyol process

• Malek Bibani,
• Romain Breitwieser,
• Alex Aubert,
• Vincent Loyau,
• Silvana Mercone,
• Souad Ammar and
• Fayna Mammeri

Beilstein J. Nanotechnol. 2019, 10, 1166–1176, doi:10.3762/bjnano.10.116

• magnetostrictive properties of cobalt ferrite materials [15]. Among the several chemical techniques that can be used for synthesizing magnetic metal-oxide NPs (such as thermal decomposition [16], hydrothermal method [17], co-precipitation of precursors [18], combustion reaction [19]), the polyol process has

A highly efficient porous rod-like Ce-doped ZnO photocatalyst for the degradation of dye contaminants in water

• Binjing Hu,
• Qiang Sun,
• Chengyi Zuo,
• Yunxin Pei,
• Siwei Yang,
• Hui Zheng and
• Fangming Liu

Beilstein J. Nanotechnol. 2019, 10, 1157–1165, doi:10.3762/bjnano.10.115

• al. [36] reported a series of Ce-doped ZnO with different molar ratio by using the co-precipitation method. The SEM images of their products demonstrated that as the molar ratio is increased, the spherical nanoparticles changed to irregular and elongated shapes, which is similar to our results. In

Photoactive nanoarchitectures based on clays incorporating TiO₂ and ZnO nanoparticles

• Eduardo Ruiz-Hitzky,
• Pilar Aranda,
• Marwa Akkari,
• Nithima Khaorapapong and
• Makoto Ogawa

Beilstein J. Nanotechnol. 2019, 10, 1140–1156, doi:10.3762/bjnano.10.114

• nanostructured materials prepared by in situ formation of NPs can be achieved by applying various procedures such as impregnation by precipitation, sol–gel, solvothermal and microwave-assisted reactions. As already indicated, clay-based nanoarchitectures containing TiO2 NPs (anatase phase) are currently the most

• , when exposed to UV light [117]. Other alternative approaches include the direct precipitation of the ZnO from Zn salts in presence of bentonite dispersed in ethanol [124] or the association of ZnO NPs with Laponite® using poly(vinyl alcohol) as binder agent [125]. In both cases, the resulting materials

Scavenging of reactive oxygen species by phenolic compound-modified maghemite nanoparticles

• Małgorzata Świętek,
• Yi-Chin Lu,
• Rafał Konefał,
• Liliana P. Ferreira,
• M. Margarida Cruz,
• Yunn-Hwa Ma and
• Daniel Horák

Beilstein J. Nanotechnol. 2019, 10, 1073–1088, doi:10.3762/bjnano.10.108

• Abstract Maghemite (γ-Fe2O3) nanoparticles obtained through co-precipitation and oxidation were coated with heparin (Hep) to yield γ-Fe2O3@Hep, and subsequently with chitosan that was modified with different phenolic compounds, including gallic acid (CS-G), hydroquinone (CS-H), and phloroglucinol (CS-P

• conjugation via esterification or amidation, and free-radical grafting [16]. The aim of this work was to design and fabricate superparamagnetic iron oxide nanoparticles with antioxidant properties. Positively charged γ-Fe2O3 nanoparticles were synthesized through co-precipitation, and their surface was

• -modified chitosan), and CS-P (phloroglucinol-modified chitosan). Synthesis of magnetic nanoparticles Iron oxide particles were prepared by a co-precipitation method with slight modifications [39]. Briefly, FeCl2·4H2O (1.191 g) and FeCl3·6H2O (3.242 g) were dissolved in water (175 mL), the solution was

Tailoring the stability/aggregation of one-dimensional TiO₂(B)/titanate nanowires using surfactants

• Atiđa Selmani,
• Johannes Lützenkirchen,
• Kristina Kučanda,
• Dario Dabić,
• Engelbert Redel,
• Ida Delač Marion,
• Damir Kralj,
• Darija Domazet Jurašin and
• Maja Dutour Sikirić

Beilstein J. Nanotechnol. 2019, 10, 1024–1037, doi:10.3762/bjnano.10.103

• -Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany Center of Excellence for Advanced Materials and Sensing Devices, Institute of Physics, Bijenička 46, 10000 Zagreb, Croatia, Laboratory for Precipitation Processes, Division of Materials Chemistry, Ruđer Bošković Institute, Bijenička Cesta 54, 10000

Structural and optical properties of penicillamine-protected gold nanocluster fractions separated by sequential size-selective fractionation

• Xiupei Yang,
• Zhengli Yang,
• Fenglin Tang,
• Jing Xu,
• Maoxue Zhang and
• Martin M. F. Choi

Beilstein J. Nanotechnol. 2019, 10, 955–966, doi:10.3762/bjnano.10.96

• University, 224 Waterloo Road, Kowloon Tong, Hong Kong SAR, China 10.3762/bjnano.10.96 Abstract Polydisperse water-soluble gold nanoclusters (AuNCs) protected by penicillamine have been synthesized in this work. The sequential size-selective precipitation (SSSP) technique has been applied for the size

• them from widely being used for the fractionation of NCs into monodisperse sizes. Moreover, the fractionation of monolayer-protected NCs by other methods often depends on the core or ligand properties, in addition to being time-consuming and sophisticated. Size-selective precipitation is a simple and

• -soluble NCs and impurities. The separation by conventional purification techniques such as extraction, precipitation, chromatography or dialysis is incomplete. Some research in our group has already addressed the purification and separation of water-soluble N-acetyl-L-cysteine monolayer-protected

In situ AFM visualization of Li–O₂ battery discharge products during redox cycling in an atmospherically controlled sample cell

• Kumar Virwani,
• Younes Ansari,
• Khanh Nguyen,
• Francisco José Alía Moreno-Ortiz,
• Jangwoo Kim,
• Maxwell J. Giammona,
• Ho-Cheol Kim and
• Young-Hye La

Beilstein J. Nanotechnol. 2019, 10, 930–940, doi:10.3762/bjnano.10.94

• reversible formation of reaction products was observed in the process of initial precipitation from solution, followed by surface nucleation and growth during discharge, and abrupt disappearance of deposits during recharge. An 11-fold increase in the cell discharge capacity was measured as the water

Deposition of metal particles onto semiconductor nanorods using an ionic liquid

• Michael D. Ballentine,
• Elizabeth G. Embry,
• Marco A. Garcia and
• Lawrence J. Hill

Beilstein J. Nanotechnol. 2019, 10, 718–724, doi:10.3762/bjnano.10.71

• afforded a mixture of platinum-decorated nanorods and additional platinum nanoparticles that were not attached to CdSe@CdS nanorods. For the platinum deposition conducted in toluene, the unattached platinum particles were removed by several dissolution and precipitation cycles using toluene and ethanol

Outstanding chain-extension effect and high UV resistance of polybutylene succinate containing amino-acid-modified layered double hydroxides

• Adam A. Marek,
• Vincent Verney,
• Christine Taviot-Gueho,
• Grazia Totaro,
• Laura Sisti,
• Annamaria Celli and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 684–695, doi:10.3762/bjnano.10.68

• preparation involving soft chemistry routes. Layered double hydroxides can be obtained as naturally existing materials or can be produced by synthetic routes (e.g., co-precipitation or ion exchange). They are also known as anionic clays or hydrotalcite-like materials and are described by the general formula

• medium wavelength range of the ultraviolet C (UVC) and ultraviolet B (UVB) regions. In the present work, Mg2Al LDH materials were first organo-modified with histidine and phenylalanine using a co-precipitation method and then characterized by X-ray diffraction (XRD), Fourier transform infrared

• Sigma-Aldrich. PBS (PBE003) was purchased from NaturePlast. All the materials were reagent grade and used as received. Layered double hydroxide synthesis The LDH hybrids with general formula Mg2Al(OH)6[amino acid]·2H2O were prepared by a co-precipitation method according to a similar procedure as

Ultrasonication-assisted synthesis of CsPbBr₃ and Cs₄PbBr₆ perovskite nanocrystals and their reversible transformation

• Longshi Rao,
• Xinrui Ding,
• Xuewei Du,
• Guanwei Liang,
• Yong Tang,
• Kairui Tang and
• Jin Z. Zhang

Beilstein J. Nanotechnol. 2019, 10, 666–676, doi:10.3762/bjnano.10.66

• Scheme 1. Cs2CO3 and PbBr2 were loaded into the liquid paraffin/OAm/OA solution. Then, the precursors were processed by tip-sonication and purified via centrifuging in the presence of methyl acetate as precipitation agent. Subsequently, the sediment was redispersed in toluene for further characterization

Topochemical engineering of composite hybrid fibers using layered double hydroxides and abietic acid

• Liji Sobhana,
• Lokesh Kesavan,
• Jan Gustafsson and
• Pedro Fardim

Beilstein J. Nanotechnol. 2019, 10, 589–605, doi:10.3762/bjnano.10.60

• -precipitation of layered double hydroxide (LDH) was performed to grow LDH crystals on the surface of the cellulose fibers, followed by the immobilization of abietic acid (AA) on LDH-grafted cellulose. Here we aimed to benefit from the hydrogen bonding between –OH groups of cellulose and LDH, and the –COOH

• unbound cellulose fibers as prepared above were hybridized with Mg–Al LDH through in situ co-precipitation. Typically, 3.0 g of disintegrated fibers (oven dry mass) was dispersed in a flask containing mixed metal-salt solutions (Mg and Al nitrate, molar ratio 3:1) under gentle stirring until a homogenous

• slurry was obtained. Aqueous solution of sodium carbonate was added dropwise to the reaction flask under constant magnetic stirring to ensure homogeneity of the reaction medium. The reaction was performed at room temperature and air atmosphere. The pH value of the co-precipitation medium was kept

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

• dissolved in 2 mL of demineralized water and 200 µL of the latex dispersion was added to the solution. Afterwards, the precipitation of the oxide was carried out by adding dropwise 2 mL of aqueous NaOH solution (0.1 M) using a syringe pump (dropping speed of 1 mL·h−1). The addition of the base leads to the

• precipitation of Ce(OH)3, which is insoluble in water. In an alkaline environment, Ce(OH)3 is spontaneously oxidized to hydrated Ce(IV) ions by the oxygen of the environment, and then hydrolyzed to form hydroxocomplexes, which eventually evolve to CeO2 [47]. The mixture was further stirred for 24 h to complete

Geometrical optimisation of core–shell nanowire arrays for enhanced absorption in thin crystalline silicon heterojunction solar cells

• Robin Vismara,
• Olindo Isabella,
• Andrea Ingenito,
• Fai Tong Si and
• Miro Zeman

Beilstein J. Nanotechnol. 2019, 10, 322–331, doi:10.3762/bjnano.10.31

• bombarding the surface of the sample. Such effect occurs with higher speed on the horizontal than on the vertical plane, due to the larger angle of incidence of ions hitting the vertical side walls, which leads to a strong anisotropy of the Si etching rate. The process is made mask-less by the precipitation

Thermal control of the defunctionalization of supported Au₂₅(glutathione)₁₈ catalysts for benzyl alcohol oxidation

• Zahraa Shahin,
• Hyewon Ji,
• Rodica Chiriac,
• Nadine Essayem,
• Franck Rataboul and
• Aude Demessence

Beilstein J. Nanotechnol. 2019, 10, 228–237, doi:10.3762/bjnano.10.21

• did not inhibit high catalytic activity, in contrast, it was enhanced, which was similar to a recent reported work [25]. The catalyst performance was compared to a catalyst synthesized by the deposition-precipitation method of gold nanoparticles on ZrO2 nanoparticles, compound (B). The average

• °C for 4 hours. The final product Au25(SG)18 was filtered, isolated by precipitation with methanol and centrifuged (10000 rpm for 15 minutes), washed several times with methanol (5000 rpm, 15 minutes), and was air-dried. Synthesis of the composite material Au25(SG)18@ZrO2 Gold cluster deposition Au25

• air, with a rate of 2 °C/min. Synthesis of AuNP@ZrO2 by deposition-precipitation The synthesis of AuNP@ZrO2 was done according to a reported protocol [40]. An aqueous solution of tetrachloroauric acid trihydrate (1.5% by mass, in 10 mL H2O) was added dropwise to ZrO2 (1 g) dispersed in 30 mL H2O while

Raman study of flash-lamp annealed aqueous Cu₂ZnSnS₄ nanocrystals

• Yevhenii Havryliuk,
• Oleksandr Selyshchev,
• Mykhailo Valakh,
• Alexandra Raevskaya,
• Oleksandr Stroyuk,
• Constance Schmidt,
• Volodymyr Dzhagan and
• Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2019, 10, 222–227, doi:10.3762/bjnano.10.20

• valence states (Cu+, Zn2+, Sn4+, S2−), Cu(II) was reduced to Cu(I) and Sn(II) was oxidized to Sn(IV) in situ during the NC formation. The concentration of the as-prepared CZTS colloids was around 30 g/L and can be further increased by solvent evaporation or a precipitation/redispersion procedure [21

Uniform Sb₂S₃ optical coatings by chemical spray method

• Jako S. Eensalu,
• Atanas Katerski,
• Erki Kärber,
• Ilona Oja Acik,
• Arvo Mere and
• Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 198–210, doi:10.3762/bjnano.10.18

• precipitation from a molten SbCl3–SC(NH2)2 mixture: A – Amorphous Sb2S3 islands nucleate on the rigid TiO2 substrate and grow by 3D Volmer–Weber growth, surrounded by a protective bubbling liquid film of volatile SbCl3 and TU decomposition products (1), eventually interconnecting by coalescence of sufficiently

pH-mediated control over the mesostructure of ordered mesoporous materials templated by polyion complex micelles

• Emilie Molina,
• Mélody Mathonnat,
• Jason Richard,
• Patrick Lacroix-Desmazes,
• Martin In,
• Philippe Dieudonné,
• Thomas Cacciaguerra,
• Corine Gérardin and
• Nathalie Marcotte

Beilstein J. Nanotechnol. 2019, 10, 144–156, doi:10.3762/bjnano.10.14

• hybrid organic–inorganic interface, which is necessary for directing the macroscopic precipitation of the hybrid material, can form through an interaction between the PEO neutral block and silicic species via the N0/I0 pathway, as in the case of SBA-type materials synthesized under acidic conditions, as

• a fixed and well-defined value (ranging from 4 to 7.9) by adding a small amount of an aqueous NaOH solution (3 mol·L−1). This results in macroscopic precipitation, which occurs more or less rapidly according to the pH value (3 min at pH 5 and 0.5 min at pH 7.9). The mixture was stirred slowly for 24

• oligomers, inducing sudden macroscopic precipitation in less than 3 min. Two different mass concentrations of the reaction medium, expressed by the wt % of DHBC, were used. The 3.9 wt % concentration was aimed at evaluating the influence of the pH on the texture, structure and chemical composition of the

Zn/F-doped tin oxide nanoparticles synthesized by laser pyrolysis: structural and optical properties

• Florian Dumitrache,
• Iuliana P. Morjan,
• Elena Dutu,
• Ion Morjan,
• Claudiu Teodor Fleaca,
• Monica Scarisoreanu,
• Alina Ilie,
• Marius Dumitru,
• Cristian Mihailescu,
• Adriana Smarandache and
• Gabriel Prodan

Beilstein J. Nanotechnol. 2019, 10, 9–21, doi:10.3762/bjnano.10.2

• .) antimony by spray pyrolysis [9] or by sol–gel methods followed by spin-coating and annealing in different environments [10], ii.) manganese by long-time annealing of Mn/SnO2 bilayers in air at 200 °C [11] or by co-precipitation [12], iii.) aluminum, copper or indium all by spray pyrolysis from ethanolic

Characterization and influence of hydroxyapatite nanopowders on living cells

• Przemyslaw Oberbek,
• Tomasz Bolek,
• Adrian Chlanda,
• Seishiro Hirano,
• Sylwia Kusnieruk,
• Julia Rogowska-Tylman,
• Ganna Nechyporenko,
• Viktor Zinchenko,
• Wojciech Swieszkowski and
• Tomasz Puzyn

Beilstein J. Nanotechnol. 2018, 9, 3079–3094, doi:10.3762/bjnano.9.286

• manufactured using many different methods, such as hydrothermal synthesis, sol–gel synthesis, wet-chemical precipitation and microwave processing [16][17][18][19]. Many studies have shown that HAp can cause different biological responses depending on its physicochemical properties [20][21][22]. It is also

A novel polyhedral oligomeric silsesquioxane-modified layered double hydroxide: preparation, characterization and properties

• Xianwei Zhang,
• Zhongzhu Ma,
• Hong Fan,
• Carla Bittencourt,
• Jintao Wan and
• Philippe Dubois

Beilstein J. Nanotechnol. 2018, 9, 3053–3068, doi:10.3762/bjnano.9.284

• stirrer, (3-aminopropyl)triethoxysilane (30 mL), methanol (720 mL) and concentrated hydrochloric acid (60 mL) were added. The system was refluxed for 20 h under vigorous stirring and then cooled down to room temperature. The white precipitate was collected after precipitation in cold THF, filtration, and

• succinic acid [38]. In detail, to a solution of OAPS (15 g) and triethylamine (15 mL) in methanol (750 mL), succinic anhydride (60 g) was added, and the reaction mixture was stirred vigorously for 2 h at room temperature. White solid was afforded after precipitation in cold chloroform, filtration and

Co-intercalated layered double hydroxides as thermal and photo-oxidation stabilizers for polypropylene

• Qian Zhang,
• Qiyu Gu,
• Fabrice Leroux,
• Pinggui Tang,
• Dianqing Li and
• Yongjun Feng

Beilstein J. Nanotechnol. 2018, 9, 2980–2988, doi:10.3762/bjnano.9.277

• fabricated a series of novel co-intercalated thermal and photo-oxidation stabilizers (HnMn′-Ca2Al) through straightforward co-precipitation of HALS and MP-Ca (Figure 1) [16][17], and examined the resistance of the HnMn′-Ca2Al/PP composites against thermal degradation and photo-oxidation as a function of the

• to the co-intercalation. The results show that co-precipitation yields Ca2Al-LDHs free of CaCO3 by-product [23]. Figure 3 shows FTIR spectra of all the HnMn′-Ca2Al-LDHs. One can observe characteristic stretching-vibration bands of LDHs, for example, the broad band at ca. 3445 cm−1 associated to the

Layered calcium phenylphosphonate: a hybrid material for a new generation of nanofillers

• Kateřina Kopecká,
• Ludvík Beneš,
• Klára Melánová,
• Vítězslav Zima,
• Petr Knotek and
• Kateřina Zetková

Beilstein J. Nanotechnol. 2018, 9, 2906–2915, doi:10.3762/bjnano.9.269

• phenylphosphonate is formed at room temperature by a co-precipitation of starting compounds – phenylphosphonic acid and a soluble source of calcium (e.g., CaCl2, as in our case) in a 1:1 molar ratio at pH > 9, as reported by Svoboda et al. [18] and described in the Experimental section. The previous work was

Nanostructure-induced performance degradation of WO₃·nH₂O for energy conversion and storage devices

• Zhenyin Hai,
• Mohammad Karbalaei Akbari,
• Zihan Wei,
• Danfeng Cui,
• Chenyang Xue,
• Hongyan Xu,
• Philippe M. Heynderickx,
• Francis Verpoort and
• Serge Zhuiykov

Beilstein J. Nanotechnol. 2018, 9, 2845–2854, doi:10.3762/bjnano.9.265

• thin films displayed a maximum response of 80% for 1% of hydrogen gas at 250 °C [36]. 2D WO3·2H2O films developed by a facile dipping process exhibited a significantly improved response time as electrochromic electrodes compared to WO3 thin films [37]. The acidic precipitation reaction was also adopted