Multilayered hyperbolic Au/TiO₂ nanostructures for enhancing the nonlinear response around the epsilon-near-zero point

• Fernando Arturo Araiza-Sixtos,
• Mauricio Gomez-Robles,
• Rafael Salas-Montiel and
• Raúl Rangel-Rojo

Beilstein J. Nanotechnol. 2026, 17, 251–261, doi:10.3762/bjnano.17.17

• both gold and titanium dioxide, we could not see a signal. This could mean that our system lacks the power output to excite the nonlinear response or that, even at our highest irradiance, the response was below the signal-to-noise ratio. Considering that, for 800 nm, our system has a minimum resolution

Comparative study on 3D morphologies of delignified, single tracheids and fibers of five wood species

• Helen Gorges,
• Felicitas von Usslar,
• Cordt Zollfrank,
• Silja Flenner,
• Imke Greving,
• Martin Müller,
• Clemens F. Schaber,
• Chuchu Li and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2026, 17, 239–250, doi:10.3762/bjnano.17.16

• . Scanning electron microscopy was used to compare the morphology between untreated and delignified fibers and tracheids. X-ray tomography enabled us to reconstruct high-resolution 3D models of delignified single tracheids or fibers, providing information on the pit arrangements. Moreover, delignification

• connections between neighboring cells. This knowledge is valuable for optimizing wood processing techniques, developing new wood-based materials and improving the understanding of wood anatomy and its biological function. By removing lignin, it is now possible to obtain high-resolution 3D models of separated

• largely absent from scientific literature. Although previous studies have examined wood anatomy using various imaging techniques, such as X-ray micro-computed tomography in addition to scanning and transmission electron microscopy [22][23][24][25][26][27], high-resolution 3D reconstructions of single

Gold nanoparticle-decorated reduced graphene oxide as a highly effective catalyst for the selective α,β-dehydrogenation of N-alkyl-4-piperidones

• Brenda Flore Kenyim,
• Mihir Tzalis,
• Marilyn Kaul,
• Robert Oestreich,
• Aysenur Limon,
• Chancellin Pecheu Nkepdep and
• Christoph Janiak

Beilstein J. Nanotechnol. 2026, 17, 218–238, doi:10.3762/bjnano.17.15

Time of flight secondary ion mass spectrometry imaging of contaminant species in chemical vapour deposited graphene on copper

• Barry Brennan,
• Vlad-Petru Veigang-Radulescu,
• Philipp Braeuninger-Weimer,
• Stephan Hofmann and
• Andrew J. Pollard

Beilstein J. Nanotechnol. 2026, 17, 200–213, doi:10.3762/bjnano.17.13

• characterisation techniques with the ability to distinguish different chemical species present, combined with surface sensitivity and suitably high spatial resolution. We here focus on time-of-flight secondary ion mass spectrometry (ToF-SIMS) imaging of Cu-catalysed graphene CVD samples. ToF-SIMS offers high

• surface sensitivity (<1 nm depth), low detection limits (ppm and better), high mass resolution to aid identification of chemical species in both molecular and elemental forms [28][29][34], combined with below 30 nm lateral resolution possible under optimal conditions [35]. We investigate a range of

• a pass energy of 40 eV for high resolution, narrow scan window spectra (100 meV step size, 500 ms dwell time), and 160 eV for wide scans (1000 meV step size, 200 ms dwell time), using a monochromated Al Kα X-ray source, with a photon energy of 1486.7 eV. Spectral peak fitting was carried out using

Structure-dependent thermochromism of PAZO thin films: theory and experiment

• Georgi Mateev,
• Dean Dimov,
• Nataliya Berberova-Buhova,
• Nikoleta Kircheva,
• Todor Dudev,
• Ludmila Nikolova,
• Elena Stoykova,
• Keehoon Hong,
• Dimana Nazarova,
• Silvia Angelova and
• Lian Nedelchev

Beilstein J. Nanotechnol. 2026, 17, 186–199, doi:10.3762/bjnano.17.12

• a spectral range of 4440 to 600 cm−1 with resolution of 2 cm−1 and 64 scans used. The fluorescence spectra were recorded using a FluoroLog 3–22 (HORIBA) spectrofluorometer in the spectral range of 250–800 nm with resolution of 0.5 nm and double-grating monochromators by excitation wavelength set

Influence of surface characteristics on the in vitro stability and cell uptake of nanoliposomes for brain delivery

• Dushko Shalabalija,
• Ljubica Mihailova,
• Nikola Geskovski,
• Andreas Zimmer,
• Otmar Geiss,
• Sabrina Gioria,
• Diletta Scaccabarozzi and
• Marija Glavas Dodov

Beilstein J. Nanotechnol. 2026, 17, 139–158, doi:10.3762/bjnano.17.9

• set to 1.38 and 0.010, respectively. Water was set as the dispersant, the temperature was set to 25 °C, while the attenuation was set to 11. The 'general purpose (normal distribution)' was chosen as the analysis model. High-resolution automated electrophoresis of the adsorbed proteins onto

• at the initial time points of incubation) contains more proteins than the hard corona formed at later time intervals, resulting in a larger particle diameter at early incubation periods. High-resolution automated electrophoresis of adsorbed proteins onto the nanoliposomal surface In the next step

Functional surface engineering for cultural heritage protection: the role of superhydrophobic and superoleophobic coatings – a comprehensive review

• Giuseppe Cesare Lama,
• Marino Lavorgna,
• Letizia Verdolotti,
• Federica Recupido,
• Giovanna Giuliana Buonocore and
• Bharat Bhushan

Beilstein J. Nanotechnol. 2026, 17, 63–96, doi:10.3762/bjnano.17.6

• addition to this document, the “Terminology to characterize the conservation of tangible cultural heritage” resolution was adopted by the international Committee for Conservation of ICOM (ICOM-CC) members during the 15th Triennial Conference held in New Delhi in 2008 since a clear and consistent

Reduced graphene oxide paper electrode for lithium-ion cells – towards optimized thermal reduction

• Agata Pawłowska,
• Magdalena Baran,
• Stefan Marynowicz,
• Aleksandra Izabela Banasiak,
• Adrian Racki,
• Adrian Chlanda,
• Tymoteusz Ciuk,
• Marta Wolczko and
• Andrzej Budziak

Beilstein J. Nanotechnol. 2026, 17, 24–37, doi:10.3762/bjnano.17.3

• 100). XPS X-ray photoelectron spectroscopy was applied to determine the surface concentrations of chemical bonds. The equipment applied was a PHI VersaProbeII Scanning XPS system with monochromatic Al Kα (1486.6 eV) X-rays (100 μm spot focused). High-energy-resolution spectra were obtained with 46.95

Quantitative estimation of nanoparticle/substrate adhesion by atomic force microscopy

• Aydan Çiçek,
• Markus Kratzer,
• Christian Teichert and
• Christian Mitterer

Beilstein J. Nanotechnol. 2026, 17, 1–14, doi:10.3762/bjnano.17.1

• resolution. These scans captured both topography signals from vertical cantilever movement and lateral signals from twisting of the cantilever (Figure 1a). The vertical bending of the cantilever, which is linked to the height of the NPs and to their diameter (assuming spherical NPs), was recorded to provide

Internal 3D temperature mapping in biological systems using ratiometric light-sheet imaging and lipid-coated upconversion nanothermometers

• Dannareli Barron-Ortiz,
• Enric Pérez-Parets,
• Rubén D. Cadena-Nava,
• Emilio J. Gualda,
• Jacob Licea-Rodríguez,
• Juan Hernández-Cordero,
• Pablo Loza-Álvarez and
• Israel Rocha-Mendoza

Beilstein J. Nanotechnol. 2025, 16, 2306–2316, doi:10.3762/bjnano.16.159

• enables real-time thermal mapping with both high spatial and temporal resolution at the cellular and subcellular levels. To validate the method, we performed 3D temperature imaging on fixed Caenorhabditis elegans (C. elegans) after UCNP ingestion. The proposed technique represents a cutting-edge method

• -sheet microscopy; temperature mapping; upconversion fluorescent nanoparticles; Introduction Biological processes involving energy exchange often manifest as temperature fluctuations. Materials sought to measure such changes should exhibit high sensitivity, accuracy, high spatiotemporal resolution, good

• ability to map temperature with high spatial resolution is a critical tool for probing disease mechanisms, potentially aiding in diagnostics and therapeutic evaluation. To address these limitations, luminescent nanomaterial-based thermometers (LNTs) have emerged as promising alternatives for biological

Terahertz-range on-chip local oscillator based on Josephson junction arrays for superconducting quantum-limited receivers

• Fedor V. Khan,
• Lyudmila V. Filippenko,
• Andrey B. Ermakov,
• Mikhail Yu. Fominsky and
• Valery P. Koshelets

Beilstein J. Nanotechnol. 2025, 16, 2296–2305, doi:10.3762/bjnano.16.158

• , the linewidth becomes very small due to the elimination of the influence of both low-frequency and high-frequency noises; its measured value is determined by the resolution bandwidth of the spectrum analyzer. The detailed study of the phase noise in the PLL mode is subject for further research. The

Improving magnetic properties of Mn- and Zn-doped core–shell iron oxide nanoparticles by tuning their size

• Dounia Louaguef,
• Ghouti Medjahdi,
• Sébastien Diliberto,
• Klaus M. Seemann,
• Thomas Gries,
• Joelle Bizeau,
• Damien Mertz,
• Eric Gaffet and
• Halima Alem

Beilstein J. Nanotechnol. 2025, 16, 2285–2295, doi:10.3762/bjnano.16.157

• while expecting good biocompatibility. The use of size-controlled synthesis enables the exploration of size-dependent magnetic properties, while the direct characterization of the core–shell structure using Fourier-transform infrared spectroscopy (FTIR) and high-resolution transmission electron

• evaluation of the Mössbauer spectra was performed by least-square fitting of lines using the Winnormos (Wissel) program. The error on all Fe Mössbauer spectra was ±0.1 mm·s−1. High-resolution transmission electron microscopy (HRTEM) and scanning transmission electron microscopy (STEM) images were performed

• and sizes were obtained using a CM200 TEM from Philips with an acceleration voltage of 200 kV, a point resolution of approximately 0.27 nm and a magnification from 50.000× to 750.000×. One drop of a diluted solution of NPs in toluene was deposited on a holey carbon grid. The latter was heated on a hot

Visualizing nanostructures in supramolecular hydrogels: a correlative study using confocal and cryogenic scanning electron microscopy

• Shaun M. Smith,
• Ferdinando Malagreca,
• Jacqueline Hicks,
• Giuseppe Mantovani,
• David B. Amabilino,
• Christopher Parmenter and
• Lluïsa Pérez-García

Beilstein J. Nanotechnol. 2025, 16, 2274–2284, doi:10.3762/bjnano.16.156

• selective incorporation of fluorophores, it is possible to highlight different components of the hydrogel or embedded cells, facilitating 3D reconstruction of the microarchitecture [10]. However, the achievable resolution in conventional confocal microscopy is still restricted to over one hundred nanometres

• [11]. Cryogenic scanning electron microscopy (cryo-SEM) bypasses many of these resolution limits by preserving the hydrogel through rapid freezing and subsequent fracture, thereby maintaining native-like morphology in the microscope in the form of a xerogel (no solvent) nature [12][13][14]. High

• -resolution images of the fibrillar networks can be obtained at a resolution of tens of nanometres or better, revealing fine structural details such as individual fibrils and nanoscale pore walls [6][12][14]. However, the specialized sample preparation required for cryo-SEM (including vitrification

Chiral plasmonic nanostructures fabricated with circularly polarized light

• Tian Qiao and
• Ming Lee Tang

Beilstein J. Nanotechnol. 2025, 16, 2245–2264, doi:10.3762/bjnano.16.154

• resolution of 10 nm or better to characterize plasmon near fields. These techniques can be readily applied to cPNSs to map the chirality of the near-field geometry or the near-field interaction with CPL. NSOM is a scanning probe technique that overcomes the diffraction limit in traditional far-field optical

• microscopy by exciting samples with an evanescent field. An optical image with tens of nanometers or higher spatial resolution is generated with a probe scanning the sample, recording the light-matter interaction in the near field of the sample. Polarimetry of the optical near field can be collected using

• LDOS [127]. The spatially localized electron beam excitation on PNSs allows for nanometer-scale spatial resolution. When an electron beam is incident on PNSs, plasmon modes are excited, and radiative photon emission is detected [128]. The intensity of this emission depends on LDOS. The polarization of

Optical bio/chemical sensors for vitamin B₁₂ analysis in food and pharmaceuticals: state of the art, challenges, and future outlooks

• Seyed Mohammad Taghi Gharibzahedi and
• Zeynep Altintas

Beilstein J. Nanotechnol. 2025, 16, 2207–2244, doi:10.3762/bjnano.16.153

Electromagnetic study of a split-ring resonator metamaterial with cold-electron bolometers

• Ekaterina A. Matrozova,
• Alexander V. Chiginev,
• Leonid S. Revin and
• Andrey L. Pankratov

Beilstein J. Nanotechnol. 2025, 16, 2199–2206, doi:10.3762/bjnano.16.152

• achieve an optimal balance between power load, responsivity, and total noise [17][22]. This capability is particularly critical for applications like cosmic microwave background polarimetry or high-resolution spectroscopy, where the detector must operate photon-noise-limited under a specific background

Ultrathin water layers on mannosylated gold nanoparticles

• Maiara A. Iriarte Alonso,
• Jorge H. Melillo,
• Silvina Cerveny,
• Yujin Tong and
• Alexander M. Bittner

Beilstein J. Nanotechnol. 2025, 16, 2183–2198, doi:10.3762/bjnano.16.151

• overnight sample incubation to reach 90 ± 5% RH, corresponding to very wet climate or air during precipitation. In addition, we refer to “hydrophilic conditions” in AFM for hydrophilic surfaces (APDMES silicon) scanned by a silicon tip. We found a vertical resolution (∆z) of 0.04 nm and a surface roughness

• scans, from 650 to 4000 cm−1 at a resolution of 4 cm−1, in triplicate. Background spectra were recorded on gold areas outside the evaporated droplet. The FTIR spectra were obtained with the equipment software OPUS v.6.5 without further data processing. Sum frequency generation spectroscopy VSFG spectra

Missing links in nanomaterials research impacting productivity and perceptions

• Santosh K. Tiwari and
• Nannan Wang

Beilstein J. Nanotechnol. 2025, 16, 2168–2176, doi:10.3762/bjnano.16.149

• of the most important achievements in the history of science. The influence of nanomaterials research goes beyond academic curiosity. It has triggered the evolution of microscopic and analytical techniques to visualize matter at unprecedented spatial and temporal resolution, to the point where we can

• now visualize materials at molecular and atomic scales with unprecedented resolution. Without the demands of nanomaterials research, such advancements in instrumentation and methodology would likely have taken much longer to emerge. Notably, nanomaterial research not only has expanded the

Microplastic pollution in Himalayan lakes: assessment, risks, and sustainable remediation strategies

• Sameeksha Rawat,
• S. M. Tauseef and
• Madhuben Sharma

Beilstein J. Nanotechnol. 2025, 16, 2144–2167, doi:10.3762/bjnano.16.148

• ) spectroscopy is used regularly to identify the chemical structure of MPs [34]. One of the most important developments for nanoplastic detection in complex environmental matrices is micro-FTIR to analyze particles smaller than 10 µm [35]. Raman spectroscopy improves on FTIR by using higher resolution and the

• microscopy (SEM) produces high-resolution images of particle shapes. It also indicates surface wear and tear patterns that reflect how old the MP is and how long it has been in the environment [38]. Ease of operation and minimal cost of optical microscopy make it widely used, despite being less sophisticated

Quality by design optimization of microemulsions for topical delivery of Passiflora setacea seed oil

• Daniel T. Pereira,
• Douglas Dourado,
• Danielle T. Freire,
• Dayanne L. Porto,
• Cícero F. S. Aragão,
• Myla L. de Souza,
• Guilherme R. S. de Araujo,
• Ana Maria Costa,
• Wógenes N. Oliveira,
• Anne Sapin-Minet,
• Éverton N. Alencar and
• Eryvaldo Sócrates T. Egito

Beilstein J. Nanotechnol. 2025, 16, 2116–2131, doi:10.3762/bjnano.16.146

• , Tables S4 to S6). However, the presence of significant higher-order interactions limited the predictive capability and overall fit of the model. These limitations indicated the need for a more refined strategy with higher resolution and reduced confounding effects. Therefore, a Box–Behnken design (BBD

• experimental domain. Subsequently, a three-level Box–Behnken design was used to refine the model and enhance resolution. Microemulsion clarity was visually classified into four categories: (1) transparent, (2) slightly cloudy, (3) slightly milky, and (4) milky. The experimental matrix and statistical analyses

Multifrequency AFM integrating PeakForce tapping and higher eigenmodes for heterogeneous surface characterization

• Yanping Wei,
• Jiafeng Shen,
• Yirong Yao,
• Xuke Li,
• Ming Li and
• Peiling Ke

Beilstein J. Nanotechnol. 2025, 16, 2077–2085, doi:10.3762/bjnano.16.142

• ) technique that synergistically integrates PeakForce tapping mode with higher eigenmode vibrations to achieve simultaneous high-resolution topographical imaging and to access additional contrast channels for distinguishing material regions or compositions. Unlike conventional multimodal AFM, our method

• traditional dynamic modes, PFT eliminates the need for intricate cantilever tuning by real-time regulation of the interaction force at each scan point. This innovation not only simplifies operation but also enables high-resolution topographic imaging with exceptional stability, even in challenging

• , establishing a novel multifrequency AFM technique. This method synergizes quasi-static force control with dynamic vibrational signals, enabling simultaneous high-resolution topography and mechanical mapping, as well as enhanced material contrast through eigenmode-derived phase imaging. Experimental results

Molecular and mechanical insights into gecko seta adhesion: multiscale simulations combining molecular dynamics and the finite element method

• Yash Jain,
• Saeed Norouzi,
• Tobias Materzok,
• Stanislav N. Gorb and
• Florian Müller-Plathe

Beilstein J. Nanotechnol. 2025, 16, 2055–2076, doi:10.3762/bjnano.16.141

• detachment, thereby enhancing adhesion strength. The computed pull-off forces and observed mechanisms are consistent with atomic force microscopy measurements and previous simulations. These results align with existing experimental and computational studies. They also overcome scale and resolution

• treatment to an entire seta with multiple spatulae. Since purely particle-based simulation techniques are limited by the number of atoms (or coarse-grained beads), it becomes computationally unfeasible to model an entire seta at molecular resolution. A back-of-the-envelope calculation gives an estimate of

• molecular resolution. This two-way, concurrent coupling turns adhesion from a prescribed boundary condition into an emergent, geometry- and state-dependent response: Local spatula-level peeling, sliding, and contact reorientation feed back into the global branched seta, which, in turn, reshapes the local

Stereodiscrimination of guests in chiral organosilica aerogels studied by ESR spectroscopy

• Sebastian Polarz,
• Yasar Krysiak,
• Martin Wessig and
• Florian Kuhlmann

Beilstein J. Nanotechnol. 2025, 16, 2034–2054, doi:10.3762/bjnano.16.140

• adapted for chiral separations, providing robust, reproducible methods for enantiomeric resolution. Chiral chromatography is a pivotal technique in the separation and analysis of chiral compounds, particularly in the pharmaceutical industry, where the distinction between different enantiomers of a

Beyond the shell: exploring polymer–lipid interfaces in core–shell nanofibers to carry hyaluronic acid and β-caryophyllene

• Aline Tavares da Silva Barreto,
• Francisco Alexandrino-Júnior,
• Bráulio Soares Arcanjo,
• Paulo Henrique de Souza Picciani and
• Kattya Gyselle de Holanda e Silva

Beilstein J. Nanotechnol. 2025, 16, 2015–2033, doi:10.3762/bjnano.16.139

• encapsulation within the PLA shell. An ATR-FTIR spectrometer (Frontier FT-IR/FIR, PerkinElmer, USA) was used to acquire spectra in the range of 4000–600 cm−1 with a resolution of 4 cm−1 and 60 scans. Samples analyzed included monolithic PLA nanofibers, HA/PLA, HA+NE2/PLA, and HA powder. X-ray diffraction XRD

The cement of the tube-dwelling polychaete Sabellaria alveolata: a complex composite adhesive material

• Emilie Duthoo,
• Aurélie Lambert,
• Pierre Becker,
• Carla Pugliese,
• Jean-Marc Baele,
• Arnaud Delfairière,
• Matthew J. Harrington and
• Patrick Flammang

Beilstein J. Nanotechnol. 2025, 16, 1998–2014, doi:10.3762/bjnano.16.138

• . Transverse sections through the tubes could be imaged with high resolution in SEM (JEOL JSM-7200F), showing the arrangement of cement spots binding mineral particles together. The epoxy resin embedding technique provided excellent preservation of the cement spot structure. Honeycomb worms embedded in Spurr