Liver-targeting iron oxide nanoparticles and their complexes with plant extracts for biocompatibility

• Shushanik A. Kazaryan,
• Seda A. Oganian,
• Gayane S. Vardanyan,
• Anatolie S. Sidorenko and
• Ashkhen A. Hovhannisyan

Beilstein J. Nanotechnol. 2024, 15, 1593–1602, doi:10.3762/bjnano.15.125

• in most biological and chemical reactions involved in the production of medical materials [10][11][12][13]. Magnetic nanoparticles (MNPs), such as iron oxides, not only exhibit superparamagnetism and high magnetic susceptibility, they also possess unique physical properties, biocompatibility

Atomistic insights into the morphological dynamics of gold and platinum nanoparticles: MD simulations in vacuum and aqueous media

• Evangelos Voyiatzis,
• Eugenia Valsami-Jones and
• Antreas Afantitis

Beilstein J. Nanotechnol. 2024, 15, 995–1009, doi:10.3762/bjnano.15.81

• attributable to their distinctive properties, including superparamagnetism, piezoelectricity, certain optical characteristics [9][10][11][12][13], and the enormously high surface-to-volume ratio. These special properties derive from their small size, rather than their chemical composition. Given the broad

Vinorelbine-loaded multifunctional magnetic nanoparticles as anticancer drug delivery systems: synthesis, characterization, and in vitro release study

• Zeynep Özcan and
• Afife Binnaz Hazar Yoruç

Beilstein J. Nanotechnol. 2024, 15, 256–269, doi:10.3762/bjnano.15.24

• multifunctional PEGylated magnetic nanoparticles coated with polydopamine (PDA) exhibit strong near-infrared absorption because of the PDA layer and have the ability to deliver drugs under a magnetic field owing to their superparamagnetism [51]. During the drug loading studies, the anticancer drug vinorelbine was

Photothermal ablation of murine melanomas by Fe₃O₄ nanoparticle clusters

• Xue Wang,
• Lili Xuan and
• Ying Pan

Beilstein J. Nanotechnol. 2022, 13, 255–264, doi:10.3762/bjnano.13.20

• dimension of 329.2 nm (Figure 1b). Moreover, SEM imaging at higher magnification showed that the clusters were composed of many regularly organized small nanoparticles, preventing the loss of superparamagnetism due to increased particle size. These NPCs possess high magnetization with a saturation value of

• vivo. Conclusion In summary (Figure 6), we fabricated Fe3O4 nanoparticle clusters of uniform spherical shape, with high absorption at the near-infrared 808 nm wavelength, superparamagnetism, and a strong capacity of photothermal conversion. Both in vitro studies using an immortalized A375 melanoma cell

Criteria ruling particle agglomeration

• Dieter Vollath

Beilstein J. Nanotechnol. 2021, 12, 1093–1100, doi:10.3762/bjnano.12.81

• Dieter Vollath NanoConsulting, Primelweg 3, 76297 Stutensee, Germany 10.3762/bjnano.12.81 Abstract Most of the technically important properties of nanomaterials, such as superparamagnetism or luminescence, depend on the particle size. During synthesis and handling of nanoparticles, agglomeration

• ; Introduction Many properties of technical importance of nanomaterials depend on the particle size. Typical examples are superparamagnetism, luminescence, or energetic applications. In many cases, the particles show in an “as produced” state the requested size distributions. However, during handling or storage

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

• Matías Guerrero Correa,
• Fernanda B. Martínez,
• Cristian Patiño Vidal,
• Camilo Streitt,
• Juan Escrig and
• Carol Lopez de Dicastillo

Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129

• most known and studied SPIONs. Magnetite (Fe3O4) and maghemite (γ-Fe2O3) are two crystalline phases of iron oxide that present superparamagnetic properties at the nanoscale (<20 nm). This superparamagnetism is generated due to the reduced size of these nanoparticles which allow for a higher surface-to

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

• . The superparamagnetism of the γ-Fe2O3 colloid was confirmed by SQUID magnetometry through the absence of remanence and coercivity in the magnetic hysteresis curve (Figure 3c,d). The saturation magnetization of the γ-Fe2O3 colloid (4.4 mg/mL was 0.307 A·m2·kg−1 at 260 K. The critical parameter for the

• magnetism of nanoparticles is the particle size. γ-Fe2O3 nanoparticles with sizes below the single-domain critical diameter are superparamagnetic, whereas larger particles are ferrimagnetic [26][27]. Superparamagnetism is an important feature of magnetic nanoparticles intended for biomedical applications

Tungsten disulfide-based nanocomposites for photothermal therapy

• Tzuriel Levin,
• Hagit Sade,
• Rina Ben-Shabbat Binyamini,
• Maayan Pour,
• Iftach Nachman and
• Jean-Paul Lellouche

Beilstein J. Nanotechnol. 2019, 10, 811–822, doi:10.3762/bjnano.10.81

• magnetic field until it approaches saturation, and there is no hysteresis loop. Superparamagnetism is typical for iron-oxide nanoparticles [67]. The nanocomposite WS2-NT-CM (blue curve) maintains superparamagnetism, with a saturation value of about ±13 emu/g, which is a sixth of the saturation value for

• nanocomposite from ICP (Table 1), and the molecular weights of CAN and maghemite, results in 13.2% weight of CAN-mag of the whole composite weight. Taking into account this percentage and the fact that diamagnetism is a weak effect that is always dominated by ferromagnetism (hence, by superparamagnetism), the

Review on nanoparticles and nanostructured materials: history, sources, toxicity and regulations

• Jaison Jeevanandam,
• Ahmed Barhoum,
• Yen S. Chan,
• Alain Dufresne and
• Michael K. Danquah

Beilstein J. Nanotechnol. 2018, 9, 1050–1074, doi:10.3762/bjnano.9.98

• meteorite ALH84001 [155]. Magnetotactic bacteria: Magnetotactic bacteria are highly helpful to produce magnetic oxide NPs that possess unique properties such as superparamagnetism, high coercive force and microconfiguration, which can be utilized for biological separation and in biomedicine fields [152

Near-infrared-responsive, superparamagnetic Au@Co nanochains

• Varadee Vittur,
• Arati G. Kolhatkar,
• Shreya Shah,
• Irene Rusakova,
• Dmitri Litvinov and
• T. Randall Lee

Beilstein J. Nanotechnol. 2017, 8, 1680–1687, doi:10.3762/bjnano.8.168

• (superparamagnetism) and provide a potentially useful new nanoarchitecture for biomedical or catalytic applications that can benefit from both activation by light and manipulation using an external magnetic field. Keywords: Au@Co; magneto-optical; nanochains; near-IR-active; superparamagnetic; Introduction The

Orientation of FePt nanoparticles on top of a-SiO₂/Si(001), MgO(001) and sapphire(0001): effect of thermal treatments and influence of substrate and particle size

• Martin Schilling,
• Paul Ziemann,
• Zaoli Zhang,
• Johannes Biskupek,
• Ute Kaiser and
• Ulf Wiedwald

Beilstein J. Nanotechnol. 2016, 7, 591–604, doi:10.3762/bjnano.7.52

• well-separated or at least exchange-decoupled FePt NPs potentially enables the storage of one bit per particle [4][12][13] and the critical particle size for superparamagnetism decreases to 3–4 nm assuming a bulk MAE [5][11]. In a recent experiment, highly (001)-textured FePt-C granular films have been

A facile method for the preparation of bifunctional Mn:ZnS/ZnS/Fe₃O₄ magnetic and fluorescent nanocrystals

• Houcine Labiadh,
• Tahar Ben Chaabane,
• Romain Sibille,
• Lavinia Balan and
• Raphaël Schneider

Beilstein J. Nanotechnol. 2015, 6, 1743–1751, doi:10.3762/bjnano.6.178

• [5][23][24]. Mn:ZnS/ZnS QDs were first prepared in aqueous solution in the presence of the MPA ligand. The Fe3O4 layer was next grown on the preformed Mn:ZnS/ZnS QDs in aqueous solution. The resulting bifunctional, core/shell/shell Mn:ZnS/ZnS/Fe3O4 QDs exhibited superparamagnetism and fluorescence

Structural and magnetic properties of iron nanowires and iron nanoparticles fabricated through a reduction reaction

• Marcin Krajewski,
• Wei Syuan Lin,
• Hong Ming Lin,
• Katarzyna Brzozka,
• Sabina Lewinska,
• Natalia Nedelko,
• Anna Slawska-Waniewska,
• Jolanta Borysiuk and
• Dariusz Wasik

Beilstein J. Nanotechnol. 2015, 6, 1652–1660, doi:10.3762/bjnano.6.167

• components, a doublet with an isomer shift of 0.41–0.43 mm/s and a singlet with an isomer shift of 0.03–0.07 mm/s and small intensity can be observed in the spectrum. Considering that in both studied materials the particles are relatively large and couple by dipolar interactions, the superparamagnetism is

Inorganic Janus particles for biomedical applications

• Isabel Schick,
• Steffen Lorenz,
• Dominik Gehrig,
• Stefan Tenzer,
• Wiebke Storck,
• Karl Fischer,
• Dennis Strand,
• Frédéric Laquai and
• Wolfgang Tremel

Beilstein J. Nanotechnol. 2014, 5, 2346–2362, doi:10.3762/bjnano.5.244

• simple systems. They may be viewed as test cases for developing new synthetic methods. Janus particles with practical applicability can be envisioned by integrating specific functions, such as superparamagnetism, fluorescence, biocompatibility, or catalysis, stimulus-responsiveness, and dispersibility in

A study on the consequence of swift heavy ion irradiation of Zn–silica nanocomposite thin films: electronic sputtering

• Compesh Pannu,
• Udai B. Singh,
• Dinesh. C. Agarwal,
• Saif A. Khan,
• Sunil Ojha,
• Ramesh Chandra,
• Hiro Amekura,
• Debdulal Kabiraj and
• Devesh. K. Avasthi

Beilstein J. Nanotechnol. 2014, 5, 1691–1698, doi:10.3762/bjnano.5.179

• plasmon resonance [1], fast optical response [2], and superparamagnetism [3], strongly depend on shape, size, size distribution and the surrounding environment of the metal nanoparticles [4]. Thus, the properties of nanocomposites can be controlled by the variation of these parameters. Swift heavy ion

Manipulation of isolated brain nerve terminals by an external magnetic field using D-mannose-coated γ-Fe₂O₃ nano-sized particles and assessment of their effects on glutamate transport

• Tatiana Borisova,
• Natalia Krisanova,
• Arsenii Borуsov,
• Roman Sivko,
• Ludmila Ostapchenko,
• Michal Babic and
• Daniel Horak

Beilstein J. Nanotechnol. 2014, 5, 778–788, doi:10.3762/bjnano.5.90

• candidates to increase the efficiency of targeted drug delivery not because of the possibility to attach antibodies to their surfaces, but also because of the possibly to use external magnetic guidance [3]. Superparamagnetism is an important characteristic because when the external magnetic field is taken

Extracellular biosynthesis of gadolinium oxide (Gd₂O₃) nanoparticles, their biodistribution and bioconjugation with the chemically modified anticancer drug taxol

• Shadab Ali Khan,
• Sanjay Gambhir and
• Absar Ahmad

Beilstein J. Nanotechnol. 2014, 5, 249–257, doi:10.3762/bjnano.5.27

• convertor [2][3], as additives in UO2 fuel rods for nuclear reactors [2], and as an additive in ZrO2 to enhance its toughness [3][4]. Gd2O3 has several potential applications in biomedicine, too. For example, it is used in magnetic resonance imaging, since it exhibits superparamagnetism and involves T1

Controlled positioning of nanoparticles on a micrometer scale

• Fabian Enderle,
• Oliver Dubbers,
• Alfred Plettl and
• Paul Ziemann

Beilstein J. Nanotechnol. 2012, 3, 773–777, doi:10.3762/bjnano.3.86

• magnetic storage impossible at ambient temperature. On the other hand, this superparamagnetism poses experimental challenges to try and test new materials and alternative arrangements or novel concepts on the nanoscale to satisfy high-density magnetic data storage [1][2][3][4]. In this context, percolating

Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles

• Srinivasa Saranu,
• Sören Selve,
• Ute Kaiser,
• Luyang Han,
• Ulf Wiedwald,
• Paul Ziemann and
• Ulrich Herr

Beilstein J. Nanotechnol. 2011, 2, 268–275, doi:10.3762/bjnano.2.31

• energy scales with the particle volume, the storage density in media composed of individual nanoparticles is limited by the onset of superparamagnetism. One solution to overcome this limitation is the use of materials with extremely large magneto-crystalline anisotropy. In this article, we follow an

• approach for adjusting the magnetic properties of nanoparticles, which is essential for application in future data storage media. Keywords: hydrogen in metals; magnetic anisotropy; magnetic data storage; magneto-elastic interactions; nanoparticles; superparamagnetism; thin films; Introduction Magnetic

• that TB does not change indicates that the magnetization may fluctuate in the plane of the film in the same way as before the H loading. In terms of the “energy landscape” picture often used to describe the onset of superparamagnetism, this would translate to a shift of the whole landscape to a lower

Magnetic interactions between nanoparticles

• Steen Mørup,
• Mikkel Fougt Hansen and
• Cathrine Frandsen

Beilstein J. Nanotechnol. 2010, 1, 182–190, doi:10.3762/bjnano.1.22

• with Equation 15, because of the decrease of the order parameter, b(T) with increasing temperature, as illustrated in Figure 6. Conclusion During the first decades after the discovery of superparamagnetism, almost all experimental data for the magnetic dynamics of nanoparticles were analyzed by use of

Magnetic nanoparticles for biomedical NMR-based diagnostics

• Huilin Shao,
• Tae-Jong Yoon,
• Monty Liong,
• Ralph Weissleder and
• Hakho Lee

Beilstein J. Nanotechnol. 2010, 1, 142–154, doi:10.3762/bjnano.1.17

• particular direction defined by magnetic anisotropy. At sufficiently high temperatures (above blocking temperature), thermal energy can induce free rotation of the magnetic moment. Thus, when MNPs are grouped together, they display a form of paramagnetic behavior, known as superparamagnetism: MNPs assume

• overall magnetic moments when placed in an external magnetic field but lose their moments when the field is removed. Distinct from paramagnetism, which arises from individual spins at the atomic or molecular level, superparamagnetism applies to magnetic elements that already assume a magnetically-ordered

Uniform excitations in magnetic nanoparticles

• Steen Mørup,
• Cathrine Frandsen and
• Mikkel Fougt Hansen

Beilstein J. Nanotechnol. 2010, 1, 48–54, doi:10.3762/bjnano.1.6

• these effects may be difficult to distinguish from the contribution from the thermoinduced magnetization. Conclusion After the discovery of superparamagnetism much of the research in the field of magnetic nanoparticles has focused on superparamagnetic relaxation while the magnetic dynamics below TB has

Preparation and characterization of supported magnetic nanoparticles prepared by reverse micelles

• Ulf Wiedwald,
• Luyang Han,
• Johannes Biskupek,
• Ute Kaiser and
• Paul Ziemann

Beilstein J. Nanotechnol. 2010, 1, 24–47, doi:10.3762/bjnano.1.5

Preparation, properties and applications of magnetic nanoparticles

• Ulf Wiedwald and
• Paul Ziemann

Beilstein J. Nanotechnol. 2010, 1, 21–23, doi:10.3762/bjnano.1.4

• scale of typically a decade is not at all compatible with superparamagnetism. A natural way out of this problem is to look for materials exhibiting an as high as possible magnetocrystalline anisotropy which suppresses fluctuations of the effective magnetic moment of the NPs [7]. For binary alloys like