Synthesis and magnetic transitions of rare-earth-free Fe–Mn–Ni–Si-based compositionally complex alloys at bulk and nanoscale

• Shabbir Tahir,
• Tatiana Smoliarova,
• Carlos Doñate-Buendía,
• Michael Farle,
• Natalia Shkodich and
• Bilal Gökce

Beilstein J. Nanotechnol. 2025, 16, 823–836, doi:10.3762/bjnano.16.62

• ), University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany GROC·UJI, Institute of New Imaging Technologies, Universitat Jaume I, Av. De Vicent Sos Baynat s/n, 12071 Castellón, Spain 10.3762/bjnano.16.62 Abstract Magnetic phase transitions at the Curie temperature are essential for applications like

• magnetocaloric refrigeration, magnetic sensors, and actuators, but the reliance on costly, scarce rare-earth materials limits sustainability. Developing affordable, rare-earth-free materials with tunable magnetic properties and scalable miniaturization methods is vital for advancing technology. We present a

• comprehensive synthesis approach for rare-earth-free compositionally complex alloys (CCAs) with magnetic phase transitions, spanning from bulk materials to nanoparticles. Specifically, we investigate Mn22.3Fe22.2Ni22.2Ge16.65Si16.65 (Ge-based CCA) and Mn0.5Fe0.5NiSi0.93Al0.07 (Al-based CCA). The bulk materials

Morphology and properties of pyrite nanoparticles obtained by pulsed laser ablation in liquid and thin films for photodetection

• Akshana Parameswaran Sreekala,
• Bindu Krishnan,
• Rene Fabian Cienfuegos Pelaes,
• David Avellaneda Avellaneda,
• Josué Amílcar Aguilar-Martínez and
• Sadasivan Shaji

Beilstein J. Nanotechnol. 2025, 16, 785–805, doi:10.3762/bjnano.16.60

• of a magnetic field by laser ablation in liquids. SEM and TEM images of FeS2 nanoparticles prepared without a magnetic field revealed spherical particles with varying sizes, aggregation and agglomeration with an average size of approximately 40 nm [38]. In contrast to this, the average particle sizes

• phase-pure FeS2. A photodetector with detectivity of around 108 Jones was reported [68]. Mohsin et al. reported an external magnetic field-assisted laser ablation in liquid technique to prepare FeS2 nanoparticles [38]. They reported fabrication of FeS2 NPs/p-Si photodetectors using dipping technique

Changes of structural, magnetic and spectroscopic properties of microencapsulated iron sucrose nanoparticles in saline

• Sabina Lewińska,
• Pavlo Aleshkevych,
• Roman Minikayev,
• Anna Bajorek,
• Mateusz Dulski,
• Krystian Prusik,
• Tomasz Wojciechowski and
• Anna Ślawska-Waniewska

Beilstein J. Nanotechnol. 2025, 16, 762–784, doi:10.3762/bjnano.16.59

• changes upon dissolution in saline were tested. For the undissolved sample, calcium alginate microcapsules with irregular shapes were registered via scanning electron microscopy, inside which core–shell nanoparticles were identified by transmission electron microscopy micrographs. Magnetic studies (DC and

• completely dissolved sample. Keywords: calcium alginate; dissolution; iron oxyhydroxide nanoparticles; magnetic properties; saline; spectroscopy; Introduction Hematinic are substances such as iron, vitamin B12, and folic acid that are essential in the production of blood [1]. Iron deficiency drugs, which

• size of the drug for easier swallowing. Simultaneously, all these compounds due to the iron content should exhibit magnetic properties that may potentially turn out to be interesting. Moreover, since all iron deficiency agents are commercial products and are mass produced, their properties can be

Thickness dependent oxidation in CrCl₃: a scanning X-ray photoemission and Kelvin probe microscopies study

• Shafaq Kazim,
• Rahul Parmar,
• Maryam Azizinia,
• Matteo Amati,
• Muhammad Rauf,
• Andrea Di Cicco,
• Seyed Javid Rezvani,
• Dario Mastrippolito,
• Luca Ottaviano,
• Tomasz Klimczuk,
• Luca Gregoratti and
• Roberto Gunnella

Beilstein J. Nanotechnol. 2025, 16, 749–761, doi:10.3762/bjnano.16.58

• content of defects such as adatoms, the length of grain boundaries, vacancies, and substitution impurities influence the electrical, magnetic, and electronic properties of the final device [14][15][4]. To name one, the formation of chalcogenide vacancies is often related to the enhanced dissociation of

• molecular oxygen [16] at the metal species. These defects do not only change the electronic behavior of the sample by modifying the band structure [17]; they are also responsible for Curie temperature deviations, work function modifications [18], and induced long-range magnetic orders (i.e., magnetic band

• properties for 2D magnets by manipulating factors such as layer thickness, applied strain, and induced defect sites. Numerous theoretical studies predict that magnetic order in monolayers occurs at temperatures significantly higher than the bulk Curie temperature (i.e., 17 K). In their work, Liu et al

Serum heat inactivation diminishes ApoE-mediated uptake of D-Lin-MC3-DMA lipid nanoparticles

• Demian van Straten,
• Luuk van de Schepop,
• Rowan Frunt,
• Pieter Vader and
• Raymond M. Schiffelers

Beilstein J. Nanotechnol. 2025, 16, 740–748, doi:10.3762/bjnano.16.57

• , uptake of LNPs by HMEC-1 was reduced by ≈50% (Figure 3B). To directly demonstrate an effect of heat inactivation of serum on the binding of ApoE3 to LNPs, biotinylated LNPs were incubated in HI and NHI human serum. The LNPs were subsequently isolated via streptavidin decorated magnetic beads

• by magnetic beads after incubation in human serum, heat treated human serum and recombinant ApoE3 in PBS, as determined by flow cytometry (D) (n = 2). Differences were considered statistically significant at p < 0.05 and were annotated as ns = non-significant, * = p ≤ 0.05, ** = p ≤ 0.01, *** = p

Synthesis of a multicomponent cellulose-based adsorbent for tetracycline removal from aquaculture water

• Uyen Bao Tran,
• Ngoc Thanh Vo-Tran,
• Khai The Truong,
• Dat Anh Nguyen,
• Quang Nhat Tran,
• Huu-Quang Nguyen,
• Jaebeom Lee and
• Hai Son Truong-Lam

Beilstein J. Nanotechnol. 2025, 16, 728–739, doi:10.3762/bjnano.16.56

• particularly notable for their high target specificity. Although MIPs are effective, their synthesis requires exceptional precision and is time-intensive. Meanwhile, magnetic solid-phase extraction columns [15] have been explored for TC removal; however, they are impractical for processing large sample volumes

• . To prepare PGC, 1.5 g of CMC, 0.25 g of CaCl2, and 3.637 g of ZnSO4 were added to a beaker containing 30 mL of distilled water, where they were completely dissolved under magnetic stirring at 800 rpm for 30 min, forming solution A. Subsequently, 1.0 g of PVA and 0.1 mL of 1% H2SO4 were added, and the

Nanostructured materials characterized by scanning photoelectron spectromicroscopy

• Matteo Amati,
• Alexey S. Shkvarin,
• Alexander I. Merentsov,
• Alexander N. Titov,
• María Taeño,
• David Maestre,
• Sarah R. McKibbin,
• Zygmunt Milosz,
• Ana Cremades,
• Rainer Timm and
• Luca Gregoratti

Beilstein J. Nanotechnol. 2025, 16, 700–710, doi:10.3762/bjnano.16.54

• spectroscopy can provide an elemental, chemical, and electronic mapping of sample surfaces in the pristine form or after/during their response to external stimuli such as temperature changes, electric and magnetic fields, and light and gas exposure. In the first example chemical heterogeneous layered

High-temperature epitaxial growth of tantalum nitride thin films on MgO: structural evolution and potential for SQUID applications

• Michelle Cedillo Rosillo,
• Oscar Contreras López,
• Jesús Antonio Díaz,
• Agustín Conde Gallardo and
• Harvi A. Castillo Cuero

Beilstein J. Nanotechnol. 2025, 16, 690–699, doi:10.3762/bjnano.16.53

• transition temperature (Tc). Discovered in 1911 by Heike Kamerlingh Onnes [1], superconductors exhibit unique properties, including perfect conductivity and the Meissner effect [2], that is, the expulsion of magnetic fields. These remarkable properties make them highly valuable for diverse applications, such

• as lossless power transmission, magnetic levitation in transportation systems, and the creation of powerful electromagnets. Furthermore, superconductivity plays a pivotal role in the development of advanced technologies, including quantum computing and nanometric electronic devices. Despite

• critical temperature of 6.3 K. In materials with superconducting properties, any variation of an external magnetic field induces electric currents on the surface that counteract this variation. This unique property enables the materials to detect very weak magnetic fields. This principle is leveraged in

Colloidal few layered graphene–tannic acid preserves the biocompatibility of periodontal ligament cells

• Teissir Ben Ammar,
• Naji Kharouf,
• Dominique Vautier,
• Housseinou Ba,
• Nivedita Sudheer,
• Philippe Lavalle and
• Vincent Ball

Beilstein J. Nanotechnol. 2025, 16, 664–677, doi:10.3762/bjnano.16.51

• few defects The synthesis process combined graphite and TA in a 10:1 mass ratio in an aqueous medium, followed by probe ultrasonication enhanced by magnetic stirring, resulting in a stable colloid as shown in Figure S3, Supporting Information File 1. The polyphenolic structure of tannic acid

A formulation containing Cymbopogon flexuosus essential oil: improvement of biochemical parameters and oxidative stress in diabetic rats

• Ailton Santos Sena-Júnior,
• Cleverton Nascimento Santana Andrade,
• Pedro Henrique Macedo Moura,
• Jocsã Hémany Cândido dos Santos,
• Cauãn Torres Trancoso,
• Eloia Emanuelly Dias Silva,
• Deise Maria Rego Rodrigues Silva,
• Ênio Pereira Telles,
• Luiz André Santos Silva,
• Isabella Lima Dantas Teles,
• Sara Fernanda Mota de Almeida,
• Daniel Alves de Souza,
• Jileno Ferreira Santos,
• Felipe José Aidar Martins,
• Ana Mara de Oliveira e Silva,
• Sandra Lauton-Santos,
• Guilherme Rodolfo Souza de Araujo,
• Cristiane Bani Correa,
• Rogéria De Souza Nunes,
• Lysandro Pinto Borges and
• Ana Amélia Moreira Lira

Beilstein J. Nanotechnol. 2025, 16, 617–636, doi:10.3762/bjnano.16.48

• chosen based on a previous paper from our research group [49]. The proportions of the components were defined using the pseudoternary phase diagram [50]. First, the surfactant phase was prepared from a mixture of Tween® 80 and Eumulgin® CO40 in a ratio of 1:1 (w/w) by magnetic homogenization for 24 h

• . The oil phase was then added to the surfactant solution, still under magnetic stirring, and homogenized for 30 min. The oil phase and surfactant solutions were prepared in proportions of 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2, and 9:1. Each solution was titrated with pre-defined volumes of water [51

Focused ion and electron beams for synthesis and characterization of nanomaterials

• Aleksandra Szkudlarek

Beilstein J. Nanotechnol. 2025, 16, 613–616, doi:10.3762/bjnano.16.47

• tailored 3D architectures [4]. Focused beams not only allow the characterization of atomic structures but also enable precise local modification of material properties through ion milling and the creation of novel structures with tunable mechanical, electrical, and magnetic properties using gas-assisted

Feasibility analysis of carbon nanofiber synthesis and morphology control using a LPG premixed flame

• Iftikhar Rahman Bishal,
• Muhammad Hilmi Ibrahim,
• Norikhwan Hamzah,
• Mohd Zamri Mohd Yusop,
• Faizuan Bin Abdullah,
• I Putu Tedy Indrayana and
• Mohd Fairus Mohd Yasin

Beilstein J. Nanotechnol. 2025, 16, 581–590, doi:10.3762/bjnano.16.45

• used as a substrate for the synthesis process. In this process, 20.30 g of nickel nitrate hexahydrate were mixed with 70 mL of deionized water using a magnetic stirrer to prepare a 1 M nickel nitrate solution. The solution of nickel nitrate was used to impregnate the pores of the spherical zirconia

Nanomaterials in targeting amyloid-β oligomers: current advances and future directions for Alzheimer's disease diagnosis and therapy

• Shiwani Randhawa,
• Trilok Chand Saini,
• Manik Bathla,
• Rahul Bhardwaj,
• Rubina Dhiman and
• Amitabha Acharya

Beilstein J. Nanotechnol. 2025, 16, 561–580, doi:10.3762/bjnano.16.44

• specifically designed for the diagnosis and inhibition of AβOs. One example of this innovative approach is demonstrated by Viola et al., who designed mono-dispersed nitro-dopamine (nDOPA)- and polyethylene glycol (PEG)-stabilized magnetic nanostructures (MNSs) in a size range of 12–16 nm. The surface of these

Electron beam-based direct writing of nanostructures using a palladium β-ketoesterate complex

• Chinmai Sai Jureddy,
• Krzysztof Maćkosz,
• Aleksandra Butrymowicz-Kubiak,
• Iwona B. Szymańska,
• Patrik Hoffmann and
• Ivo Utke

Beilstein J. Nanotechnol. 2025, 16, 530–539, doi:10.3762/bjnano.16.41

• use of masks, achieving scales down to a few nanometers with various patterns and shapes, offers significant advantages for a wide range of technological applications. These include areas that require plasmonic [1][2][3], phononic [3][4], magnetic [5][6], optoelectronic [7][8][9], and mechanical [10

Zeolite materials with Ni and Co: synthesis and catalytic potential in the selective hydrogenation of citral

• Inocente Rodríguez-Iznaga,
• Yailen Costa Marrero,
• Tania Farias Piñeira,
• Céline Fontaine,
• Lexane Paget,
• Beatriz Concepción Rosabal,
• Arbelio Penton Madrigal,
• Vitalii Petranovskii and
• Gwendoline Lafaye

Beilstein J. Nanotechnol. 2025, 16, 520–529, doi:10.3762/bjnano.16.40

• 5 °C/min. Hydrogen uptake was monitored using the TCD. Catalytic test in citral hydrogenation In a manner analogous to [24], the hydrogenation of citral was conducted in a 250 mL autoclave equipped with a magnetic stirrer and a temperature control unit. The catalysts (400 mg) were immersed in 90 mL

Performance optimization of a microwave-coupled plasma-based ultralow-energy ECR ion source for silicon nanostructuring

• Joy Mukherjee,
• Safiul Alam Mollick,
• Tanmoy Basu and
• Tapobrata Som

Beilstein J. Nanotechnol. 2025, 16, 484–494, doi:10.3762/bjnano.16.37

• nanopatterning and nanoscale functionalization have garnered significant interest, owing to their broad applications in DNA origami [10], tuning of wettability [11] and electrical and magnetic anisotropy [12][13], isolated dot formation [1], nanoscale plasmonic arrays [14], and field emission [15]. Thus, ion

• a strong electric field generated in the cavity, the ECR-based ion sources equipped with microwave cavities neither contain any filament nor any type of electrode [26]. The high plasma density within a quartz cup is confined by solenoid magnets surrounding it, creating a multi-cusp magnetic field

• . However, careful attention is required for the microwave coupling to the plasma cup to minimize the reflections of microwave power. Mechanical adjustments to the resonator length and waveguide are made to ensure minimal reflection. Additionally, maintaining the necessary magnetic field strength is crucial

Quantification of lead through rod-shaped silver-doped zinc oxide nanoparticles using an electrochemical approach

• Ravinder Lamba,
• Gaurav Bhanjana,
• Neeraj Dilbaghi,
• Vivek Gupta and
• Sandeep Kumar

Beilstein J. Nanotechnol. 2025, 16, 422–434, doi:10.3762/bjnano.16.33

• activity, and semiconductor properties. By doping ZnO nanoparticles with transition metals, we can alter their electrical, optical, and magnetic properties by introducing new electronic states into the band structure. Herein, Ag is added to ZnO nanostructures to improve their optical properties to detect

Size control of nanoparticles synthesized by pulsed laser ablation in liquids using donut-shaped beams

• Abdel Rahman Altakroury,
• Oleksandr Gatsa,
• Farbod Riahi,
• Zongwen Fu,
• Miroslava Flimelová,
• Andrei Samokhvalov,
• Stephan Barcikowski,
• Carlos Doñate-Buendía,
• Alexander V. Bulgakov and
• Bilal Gökce

Beilstein J. Nanotechnol. 2025, 16, 407–417, doi:10.3762/bjnano.16.31

• precise compositional control such as metastable binary core–shell NPs [16] and quinary Cantor high-entropy alloy NPs [17][18]. Such high-entropy nanomaterials are recently being discussed as game changers, providing disruptive design opportunities in multifunctional catalysts or magnetic materials [19

Engineered PEG–PCL nanoparticles enable sensitive and selective detection of sodium dodecyl sulfate: a qualitative and quantitative analysis

• Soni Prajapati and
• Ranjana Singh

Beilstein J. Nanotechnol. 2025, 16, 385–396, doi:10.3762/bjnano.16.29

• manipulation of particles with a size less than 100 nm. These tiny particles possess unique physicochemical features, including optical, electrical, magnetic, and catalytic properties [23]. Indeed, the advanced properties of nanoparticles enables them to be used in different areas, such as biosensing, drug

Development of a mucoadhesive drug delivery system and its interaction with gastric cells

• Ahmet Baki Sahin,
• Serdar Karakurt and
• Deniz Sezlev Bilecen

Beilstein J. Nanotechnol. 2025, 16, 371–384, doi:10.3762/bjnano.16.28

• , 40% Amp) for 5 min, followed by 30 min of incubation on a magnetic stirrer. Finally, isopropanol (4 mL) was added to the emulsion, and the nanoparticles were collected by centrifugation (3000g for 5 min). The pellet was washed once with isopropanol and three times with double-distilled water (ddH2O

• mL) were dripped into Eudragit RS 100 suspension (2%, v/v, of Eudragit RS 30D, diluted with ddH2O) by using a syringe pump at a rate of 5 mL/h, and the dispersion was incubated on a magnetic stirrer (700 rpm, 10 min, room temperature). At the end of the incubation, coated NPs were centrifuged (10000g

Vortex lattices of layered HTSCs at different vortex–vortex interaction potentials

• Valerii P. Lenkov,
• Anastasia N. Maksimova,
• Anna N. Moroz and
• Vladimir A. Kashurnikov

Beilstein J. Nanotechnol. 2025, 16, 362–370, doi:10.3762/bjnano.16.27

• ; Introduction Type-II superconductors, as shown by numerous studies, have a complex phase diagram in a magnetic field. In fields greater than the first critical field Hc1 and less than the second critical field Hc2, at temperatures below the critical temperature the superconductor is in a mixed state, in which

• the magnetic field penetrates the superconductor in the form of Abrikosov vortices [1]. In high-temperature superconductors (HTSCs), such as Y- and Bi-based cuprates, the vortex lattice is further complicated since these compounds have a layered structure [2][3][4][5][6]. The vortex filament in these

• ordering of the pancakes, which also enhances the pinning of vortices on defects. In [8], the vortex system in a HgBa2CuO4+δ monocrystal was studied. The measurements were performed in a wide range of temperatures and magnetic fields, and the phase diagram of the vortex system was obtained as a result of

Emerging strategies in the sustainable removal of antibiotics using semiconductor-based photocatalysts

• Yunus Ahmed,
• Keya Rani Dutta,
• Parul Akhtar,
• Md. Arif Hossen,
• Md. Jahangir Alam,
• Obaid A. Alharbi,
• Hamad AlMohamadi and
• Abdul Wahab Mohammad

Beilstein J. Nanotechnol. 2025, 16, 264–285, doi:10.3762/bjnano.16.21

• efficacy of TiO2 under visible or solar-simulated light, retrieving the synthesized small particles poses new challenges. Researchers have recently synthesized heterojunctions using TiO2 and magnetic particles such as α-Fe2O3 and Fe3O4 in order to solve the problem of recovering particles. They

• /CoFe2O4 catalyst with GO, which demonstrated an 85% degradation rate for TC and a 99% degradation rate for DOX within 60 min of treatment time. The degradation efficiencies were improved through doping and further enhanced by adding GO and magnetic CoFe2O4. Numerous ternary compounds (see below in Table 5

Radiosensitizing properties of dual-functionalized carbon nanostructures loaded with temozolomide

• Radmila Milenkovska,
• Nikola Geskovski,
• Dushko Shalabalija,
• Ljubica Mihailova,
• Petre Makreski,
• Dushko Lukarski,
• Igor Stojkovski,
• Maja Simonoska Crcarevska and
• Kristina Mladenovska

Beilstein J. Nanotechnol. 2025, 16, 229–251, doi:10.3762/bjnano.16.18

• chemical modifications and/or coupling with hydrophilic polymers. TMZ was successfully incorporated in magnetic NPs [36], mesoporous silica NPs [37], and NPs made of silver [38], zinc oxide [39], and gold [40], all of them showing high accumulation in tumor cells and cytotoxic activity in vitro and in vivo

A review of metal-organic frameworks and polymers in mixed matrix membranes for CO₂ capture

• Charlotte Skjold Qvist Christensen,
• Nicholas Hansen,
• Mahboubeh Motadayen,
• Nina Lock,
• Martin Lahn Henriksen and
• Jonathan Quinson

Beilstein J. Nanotechnol. 2025, 16, 155–186, doi:10.3762/bjnano.16.14

• formed may not fully represent the structure of the fabricated MOF-based MMMs. While electron microscopy offers a highly detailed qualitative analysis of specific regions within the membrane, methods such as Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) spectroscopy

Clays enhanced with niobium: potential in wastewater treatment and reuse as pigment with antibacterial activity

• Silvia Jaerger,
• Patricia Appelt,
• Mario Antônio Alves da Cunha,
• Fabián Ccahuana Ayma,
• Ricardo Schneider,
• Carla Bittencourt and
• Fauze Jacó Anaissi

Beilstein J. Nanotechnol. 2025, 16, 141–154, doi:10.3762/bjnano.16.13

• reactor at 25 °C (open), a magnetic stirrer, and a UV lamp (253.7 nm, 15 W, 220 V) within a dark chamber. After 3 h of exposure, the solutions were centrifuged at 3500 rpm for 10 min, and their final concentrations were determined using a UV–vis spectrophotometer. These samples were labeled as A-BEPhP and