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

• 2.8 J·cm−2 [41]. Additionally, to increase the NP concentration and reduce the organic solvent use, a closed loop liquid flow system was employed. Size distribution, morphology, elemental composition, and crystal structure of the NPs from both CCA targets were examined using transmission electron

• microscopy (TEM) and EDX with a Jeol 2200FS microscope (Japan) equipped with an Oxford X-MaxN TLE 80 EDX detector (UK). The microscope was operated at an acceleration voltage of 200 kV and utilized a 2k × 2k GATAN UltraScan 1000XP CCD camera. For TEM analysis, the colloidal particles were dispersed onto a

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

• nanocolloid in this work. The optical properties of nanocolloids and their thin films were evaluated using UV–visible (UV–vis) spectroscopy. The nanoparticle characterization and surface morphology were studied using transmission electron microscopy (TEM), scanning electron microscopy (SEM), and the

• temperatures and amounts of sulfur. Characterization The morphological analyses of pyrite NPs were recorded using the FEI Titan G2 80–300 for TEM, high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), high-resolution TEM (HRTEM) and selected area electron diffraction (SAED). The

• disulfide (FeS2)) nanoparticles (NPs) of different morphologies using pulsed laser ablation in liquid (PLAL) in different organic solvents. The impact of the solvent on the morphological, compositional, and optical properties of the synthesized NPs is investigated by techniques such as transmission electron

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

• transmission electron microscopy (TEM). Composition studies using XRD, magnetic properties using dc and ac magnetometry, and extensive spectral analysis using Fourier-transform infrared spectroscopy (FTIR), Raman, and electron paramagnetic resonance (EPR) were also performed. Considering that the AB-Fortis

• nm, cores, while the thickness of the shell seems constant ≈10 nm. The sucrose shell is homogenous; thus the individual cores appear to be well separated from each other. In Figure 3c, the high-resolution transmission electron microscopy (HRTEM) image presents a single crystalline nanoparticle. The

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

• , atomic force microscopy, and transmission electron microscopy analyses revealed that the TaN films exhibit excellent crystallinity and smooth surface morphology, when deposited at optimal temperatures of 750 and 850 °C. The films exhibit superconducting transition temperatures (Tc) ranging from 5.0 to

• 750 °C, the sample, which has δ-TaN as the significant phase, exhibits a superconducting transition at Tc = 5.3 K. The highest value of Tc was obtained for the film deposited at 850 °C with pN2 = 90 mTorr (Tc = 6.3 K). Cross-sectional transmission electron microscopy samples were prepared by a 4 kV Ar

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

• granules, each being hundreds of micrometers in size (Figure 1A). In contrast, the obtained FLG–TA colloid has a layered structure, and sheets seem to have been peeled off from the graphite surface (Figure 1B,C). Transmission electron microscopy (TEM) micrographs of the flakes’ edges (Figure 1D,E) reveal

• exfoliation of graphite assisted by TA (B,C). Image (C) originates from the marked box in image (B). Transmission electron microscopy (TEM) micrographs of exfoliated FLG–TA (D,E). Size distribution and average lateral size of FLG sheets (F). Raman spectra (A) and survey XPS spectra (B) of FLG–TA and initial

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

• oxygen signal of the native oxide layer is separated from the signal of oxygen from ligand residues of [Pd(tbaoac)2] in the deposit. Nanostructural observations were performed with transmission electron microscopy (TEM) using a probe-corrected ThermoFisher Scientific Titan Themis 200 G3 operating at an

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

• formation of well-defined nanoscale ripple patterns. The prominence of ripple structures increases with prolonged irradiation time, while bombardment at 72.5° with the same ion beam parameters leads to the coarsening of nanostructures. Cross-sectional transmission electron microscopy (TEM) measurements

Effect of additives on the synthesis efficiency of nanoparticles by laser-induced reduction

• Rikuto Kuroda,
• Takahiro Nakamura,
• Hideki Ina and
• Shuhei Shibata

Beilstein J. Nanotechnol. 2025, 16, 464–472, doi:10.3762/bjnano.16.35

• solution without IPA. On the other hand, when 10 vol % IPA was added (red line in Figure 1), an increase in absorbance was immediately seen after the start of laser irradiation, and the absorbance levelled off after 5 min of laser irradiation. Figure 2 shows the transmission electron microscopy (TEM

• alloy nanoparticles by LRL with the addition of IPA as a radical scavenger to a solution containing multiple metal ions, and the structure of the synthesized nanoparticles was evaluated by scanning transmission electron microscopy-energy dispersive spectroscopy (STEM-EDS). In this case, we selected an

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

• performed using SEM (FEI Quanta 250, Netherlands). Transmission electron microscopy (TEM) was also performed to measure nanoparticle mean size and their distribution. The sample was diluted 1000-fold from the stock solution, and 5 µL of the sample was placed onto a carbon-coated copper grid with 200 mesh

• surface-area-to-volume ratio, which enhances interaction with target molecules. Transmission electron microscopy was also employed further to confirm the shape and size of the nanoparticles. The TEM images confirmed that nanoparticles were spherical with a narrow size distribution, and the mean size was

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

• nanoparticles Morphology of nanoparticles The morphological characterization of nanoparticles was done via scanning electron microscopy (SEM, Zeiss, GeminiSEM500) and scanning transmission electron microscopy (STEM, Ziess, GeminiSEM500). For SEM analysis, nanoparticles were air-dried on SEM stabs and coated

Graphene oxide–chloroquine conjugate induces DNA damage in A549 lung cancer cells through autophagy modulation

• Braham Dutt Arya,
• Sandeep Mittal,
• Prachi Joshi,
• Alok Kumar Pandey,
• Jaime E. Ramirez-Vick,
• Govind Gupta and
• Surinder P. Singh

Beilstein J. Nanotechnol. 2025, 16, 316–332, doi:10.3762/bjnano.16.24

• the specific experiment. Each group contained four technical replicates and three biological replicates for each experiment. In each assay cells without nanoconjugates were used as a control. Transmission electron microscopy analysis The A549 cells (2 × 105 cells/mL/well in 6-well plates) were exposed

• nanoconjugates. The observed data with relative % are shown in Supporting Information File 1, Table S1. The morphological analysis of GO was carried out using field-emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). In Supporting Information File 1, Figure

• to GO–Chl (25 μg/mL) for the determination of acidic vacuoles (scale bar = 50 μm). (b) Representative transmission electron microscopy photomicrographs of GO–Chl-(25 μg/mL) exposed A549 cells showing the presence of autophagosomes. Black arrows indicate the presence of autophagosomes. Scale bars are

Enhancing mechanical properties of chitosan/PVA electrospun nanofibers: a comprehensive review

• Nur Areisman Mohd Salleh,
• Amalina Muhammad Afifi,
• Fathiah Mohamed Zuki and
• Hanna Sofia SalehHudin

Beilstein J. Nanotechnol. 2025, 16, 286–307, doi:10.3762/bjnano.16.22

• , which can adversely affect mechanical performance. Besides SEM and FESEM, transmission electron microscopy (TEM) has the additional ability to visualize fiber cross sections and can be employed to examine core–shell, encapsulated, and particle-incorporated fiber structures [112][145][146]. Atomic force

Preferential enrichment and extraction of laser-synthesized nanoparticles in organic phases

• Theo Fromme,
• Maximilian L. Spiekermann,
• Florian Lehmann,
• Stephan Barcikowski,
• Thomas Seidensticker and
• Sven Reichenberger

Beilstein J. Nanotechnol. 2025, 16, 254–263, doi:10.3762/bjnano.16.20

• detectible. Extinction values for the Cu and Fe colloids can be found in Supporting Information File 1, Table S1 and Table S2, and the fractions of colloidal NPs in the propylene carbonate phase are found in Supporting Information File 1, Table S3. High-resolution transmission electron microscopy (HRTEM

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

• high-resolution transmission electron microscopy (HRTEM). Utilizing smaller MOF filler sizes is a straightforward approach to improve filler dispersion. The contact area with the polymer matrix increases when the size of MOF particles is decreased, promoting adhesion, and reducing interfacial defects

Characterization of ZnO nanoparticles synthesized using probiotic Lactiplantibacillus plantarum GP258

• Prashantkumar Siddappa Chakra,
• Aishwarya Banakar,
• Shriram Narayan Puranik,
• Vishwas Kaveeshwar,
• C. R. Ravikumar and
• Devaraja Gayathri

Beilstein J. Nanotechnol. 2025, 16, 78–89, doi:10.3762/bjnano.16.8

• characterization using UV–vis spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction measurements, energy-dispersive X-ray spectroscopy, scanning and transmission electron microscopy, photocatalytic studies, electrochemical analysis, and determination of antibacterial and anticancer activity. The

• analysis, (b) Fourier-transform infrared (FTIR) spectroscopy, (c) UV–vis spectroscopy, and (d) photocatalytic efficiency of ZnO NPs. (a, b) Transmission electron microscopy (TEM) micrographs showing the morphology and size of the nanoparticles. (c) Selected area electron diffraction (SAED) pattern of ZnO

Instance maps as an organising concept for complex experimental workflows as demonstrated for (nano)material safety research

• Benjamin Punz,
• Maja Brajnik,
• Joh Dokler,
• Jaleesia D. Amos,
• Litty Johnson,
• Katie Reilly,
• Anastasios G. Papadiamantis,
• Amaia Green Etxabe,
• Lee Walker,
• Diego S. T. Martinez,
• Steffi Friedrichs,
• Klaus M. Weltring,
• Nazende Günday-Türeli,
• Claus Svendsen,
• Christine Ogilvie Hendren,
• Mark R. Wiesner,
• Martin Himly,
• Iseult Lynch and
• Thomas E. Exner

Beilstein J. Nanotechnol. 2025, 16, 57–77, doi:10.3762/bjnano.16.7

• focused on silica (SiO2) nanomaterials in the size range of 50–100 nm (depending on the method used, i.e., transmission electron microscopy, nanoparticle tracking analysis, or dynamic light scattering (intensity or number distribution)) with different surface modifications, which are reported to be

A nanocarrier containing carboxylic and histamine groups with dual action: acetylcholine hydrolysis and antidote atropine delivery

• Elina E. Mansurova,
• Andrey A. Maslennikov,
• Anna P. Lyubina,
• Alexandra D. Voloshina,
• Irek R. Nizameev,
• Marsil K. Kadirov,
• Anzhela A. Mikhailova,
• Polina V. Mikshina,
• Albina Y. Ziganshina and
• Igor S. Antipin

Beilstein J. Nanotechnol. 2025, 16, 11–24, doi:10.3762/bjnano.16.2

• electron microscopy (TEM) images were taken with a Libra 120 EFTEM (A Carl Zeiss SMT AG Company, Oberkochen, Carl Zeiss, Germany) at 100 kV. Samples were spread on a 300 mesh copper grid with a carbon/formvar support film. 1H and 13C NMR spectra were obtained using a Bruker Avance 600 spectrometer with an

• cell line (Chang liver). The nanocarrier catalyzes the hydrolysis of acetylcholine into choline and acetic acid, which causes the dissociation of boronate bonds and the subsequent destruction of the nanocarrier, which was shown by fluorescence and NMR spectroscopy. Experimental Equipment Transmission

Attempts to preserve and visualize protein corona on the surface of biological nanoparticles in blood serum using photomodification

• Julia E. Poletaeva,
• Anastasiya V. Tupitsyna,
• Alina E. Grigor’eva,
• Ilya S. Dovydenko and
• Elena I. Ryabchikova

Beilstein J. Nanotechnol. 2024, 15, 1654–1666, doi:10.3762/bjnano.15.130

• ) in fetal bovine serum and newborn bovine serum; native sera served as a control. To isolate photomodified bio-NPs, we used ultracentrifugation (UC), sucrose gradient (12%, 30%, and 50%), and sucrose cushion (30%) methods. Isolated bio-NPs were visualized using transmission electron microscopy. The

• that, in addition to EVs, other “natural” NPs are present in the blood, namely, lipoproteins (LPs), which are not vesicles. The content of LPs in blood is incomparably higher than that of EVs [5][16]. Previously, we detected LPs using transmission electron microscopy (TEM) in various biological fluids

• supernatant was removed, the pellet was resuspended in 50 μL of remaining supernatant, and the samples were prepared for TEM examination. Photomodified FBS or NBS samples containing bio-NPs were purified in the same way. Transmission electron microscopy The size of bio-NPs determines the leading role of TEM

Fabrication of hafnium-based nanoparticles and nanostructures using picosecond laser ablation

• Abhishek Das,
• Mangababu Akkanaboina,
• Jagannath Rathod,
• R. Sai Prasad Goud,
• Kanaka Ravi Kumar,
• Raghu C. Reddy,
• Ratheesh Ravendran,
• Katia Vutova,
• S. V. S. Nageswara Rao and
• Venugopal Rao Soma

Beilstein J. Nanotechnol. 2024, 15, 1639–1653, doi:10.3762/bjnano.15.129

• techniques The synthesised NPs were drop-cast on carbon-coated copper grids to record transmission electron microscopy (TEM) images and selected area electron diffraction (SAED) patterns using a FEI Tecnai G2 S-Twin operating at 200 kV. Further, these NPs were drop-cast on cleaned Si substrates, and their

Natural nanofibers embedded in the seed mucilage envelope: composite hydrogels with specific adhesive and frictional properties

• Agnieszka Kreitschitz and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2024, 15, 1603–1618, doi:10.3762/bjnano.15.126

• atomic force microscopy (AFM), transmission electron microscopy (TEM), SEM, or cryo-SEM [45][57][63][64][65][66]. Very often, the procedures for preparing mucilage envelope samples can destroy and/or influence the organisation of polysaccharides, making the analysis of spatial structure of the mucilage

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

• Sonic-150W, MRC, Israel) at 80% power with an on/off cycle of 5/4 s. During the synthesis of the nanoparticles, a black precipitate with paramagnetic properties formed. Nature and morphology of this precipitate were determined using electron diffraction and transmission electron microscopy (TEM, LEO-912

Ultrablack color in velvet ant cuticle

• Vinicius Marques Lopez,
• Wencke Krings,
• Juliana Reis Machado,
• Stanislav Gorb and
• Rhainer Guillermo-Ferreira

Beilstein J. Nanotechnol. 2024, 15, 1554–1565, doi:10.3762/bjnano.15.122

• of the ultrablack cuticle in Traumatomutilla bifurca, an enigmatic and visually striking species of velvet ants (Hymenoptera, Mutillidae). Using a combination of scanning electron microscopy (SEM), transmission electron microscopy (TEM), confocal laser scanning microscopy (CLSM), and optical

• different magnifications, starting at 15,000× and adjusted as needed. Transmission electron microscopy (TEM) TEM was utilized to examine the internal cuticle morphology at high resolution at a nanometer scale. The apparatus was configured to operate at 50 kV with a minimum vacuum column pressure of 5.10

Effect of radiation-induced vacancy saturation on the first-order phase transformation in nanoparticles: insights from a model

• Aram Shirinyan and
• Yuriy Bilogorodskyy

Beilstein J. Nanotechnol. 2024, 15, 1453–1472, doi:10.3762/bjnano.15.117

• based on the fact that the movement of dislocations is impeded by particle surfaces (grain boundaries) quite rapidly. For example, a transmission electron microscopy study (irradiation with Kr ions at 1 MeV at room temperature and an average defect generation rate of about 2 × 10−3 dpa·s−1) showed that

• film through in situ ion irradiation, observed using atomic-resolution transmission electron microscopy [16]. The gold sample was irradiated with 2.8 MeV Au4+ ions at 200 °C with a fluence of approximately 1014 ions·cm−2 (equivalent to a dose of 10 dpa). A combination of surface- and radiation-induced

• et al. used transmission electron microscopy to investigate nanoscale Pd under 240 keV Kr ion irradiation with a flux of 1013 ions·cm−2·s−1. Pd had grain sizes, d, ranging from 10 to 100 nm. The authors found that the defect density increases with increasing grain size d, and the slope between defect

Green synthesis of carbon dot structures from Rheum Ribes and Schottky diode fabrication

• Muhammed Taha Durmus and
• Ebru Bozkurt

Beilstein J. Nanotechnol. 2024, 15, 1369–1375, doi:10.3762/bjnano.15.110

• Cary Eclipse fluorescence spectrophotometer were used for transmission electron microscopy (TEM), zeta potential measurements, X-ray diffractometry (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), micro-Raman spectroscopy, PVD thermal evaporation, scanning

Nanoarchitectonics with cetrimonium bromide on metal nanoparticles for linker-free detection of toxic metal ions and catalytic degradation of 4-nitrophenol

• Akash Kumar and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 1312–1332, doi:10.3762/bjnano.15.106

• two minor peaks at 55.04° and 73.14°, which correspond to the (220) and (311) planes; these were also observed in other studies with CTAB-capped silver nanoparticles [44]. These peaks might be related to the formation of AgO in the nanoparticles, which is reported elsewhere [44]. Transmission electron

• microscopy (TEM) enables precise nanoparticle size and shape measurements. TEM images show that AuNR1 and AuNR2 have a rod-like shape with different sizes, whereas AuNS and AgNS are spherical (Figure 3a–d). The mean sizes of CTAB-AgNS and CTAB-AuNS are 27.4 ± 4.6 and 21.1 ± 3.6 nm, respectively (Figure 3e