Upcycling agroindustrial waste into graphene oxide supports for gold nanoparticles: toward sustainable nanomaterials

• Juan Marcos Castro-Tapia,
• Selene Acosta,
• Hiram Joazet Ojeda-Galván,
• Elsie Evelyn Araujo-Palomo,
• Edgar Giovanni Villabona-Leal and
• Mildred Quintana

Beilstein J. Nanotechnol. 2026, 17, 489–504, doi:10.3762/bjnano.17.32

• synthesized from peanut shells and spent coffee grounds via a ferrocene-assisted green pyrolysis–oxidation approach. The resulting materials were compared with GO prepared via the Marcano-modified Hummers' method and its hydrazine-reduced counterpart (rGO). Comprehensive characterization was performed using

• for 24 h and ground in an agate mortar to obtain a fine powder suitable for further characterization. The Agro-GO materials derived from peanut shells, coffee waste from Xilitla, and commercial coffee waste are referred to as Agro-GOP, Agro-GOX, and Agro-GOC, respectively. Reduction of graphene oxide

• , ozone-free emission in the 310–450 nm range, λmax = 360 nm) for 60 min under continuous stirring. A purple dispersion was obtained, confirming the formation of AuNPs. Characterization techniques The optical properties of the samples were analyzed by ultraviolet–visible (UV–vis) spectroscopy with a Cary

Defects and defect-mediated engineering of two-dimensional materials: challenges and open questions

• Arkady V. Krasheninnikov,
• Matthias Batzill,
• Anouar-Akacha Delenda,
• Marija Drndić,
• Chris Ewels,
• Katharina J. Franke,
• Mahdi Ghorbani-Asl,
• Alexander Holleitner,
• Ado Jorio,
• Ute Kaiser,
• Daria Kieczka,
• Hannu-Pekka Komsa,
• Jani Kotakoski,
• Manuel Längle,
• David Lamprecht,
• Yun Liu,
• Steven G. Louie,
• Janina Maultzsch,
• Thomas Michely,
• Katherine Milton,
• Anna Niggas,
• Hanako Okuno,
• Joshua A. Robinson,
• Marika Schleberger,
• Bruno Schuler,
• Alexander Shluger,
• Kazu Suenaga,
• Kristian S. Thygesen,
• Richard A. Wilhelm,
• E. Harriet Åhlgren and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2026, 17, 454–488, doi:10.3762/bjnano.17.31

• graphene, local versus extended defect-induced potential [110], p versus n substitutional doping atoms, [111], and armchair versus zigzag edges [112] can be differentiated. A fundamental characterization enabled by Raman spectroscopy was the distinction between defect dimensionalities. Geometrically, a 2D

• , promise to further enhance defect characterization and accelerate the development of high-performance materials for various applications. The fundamental principle of XPS lies in its ability to probe the binding energies of core electrons, which are influenced by the local electronic environment

• defects in 2D materials under various environmental conditions [187][188][189][190][191][192]. Despite its strengths, XPS has several limitations that must be addressed for accurate defect characterization. One major challenge is surface contamination, which can obscure defect signals. Hydrocarbon

Nanocarrier-integrated multilayer films produced by 3D printing for improved skin adhesion and curcumin photostability

• Thayse Viana de Oliveira,
• Ana Paula Farias Leão,
• Júlia Leão,
• Cesar Liberato Petzhold and
• Ruy Carlos Ruver Beck

Beilstein J. Nanotechnol. 2026, 17, 440–453, doi:10.3762/bjnano.17.30

•  2 provides a summary of results from physicochemical characterization. Printing ink During the 3D printing process, the rheological behaviour of a printing ink is directly related to printability and the ability to form stable, structured layers, in order to avoid collapse after addition of

Biomimetic nanoparticles in cancer photodynamic therapy: a review of targeted delivery systems and therapeutic outcomes

• Valentina I. Gorbacheva,
• Alexey S. Grabovoy,
• Polina S. Marukhina,
• Anastasiia O. Syrocheva and
• Ekaterina P. Kolesova

Beilstein J. Nanotechnol. 2026, 17, 396–422, doi:10.3762/bjnano.17.27

• coating thickness, core material, and release mechanisms. Addressing these challenges through standardized production protocols, improved characterization, and enhanced biocompatibility will be critical to advancing BNPs toward clinical application. Biomimetic nanocarriers, designed to replicate structure

Eco-efficient materials for agricultural crops based on a mineral rich in MOR- and HEU-type zeolites

• Esperanza Yamile de la Nuez-Pantoja,
• Inocente Rodríguez-Iznaga,
• Gerardo Rodríguez-Fuentes,
• Vitalii Petranovskii,
• Ariel Martínez García,
• José Juan Calvino Gámez and
• Daniel Goma Jiménez

Beilstein J. Nanotechnol. 2026, 17, 381–395, doi:10.3762/bjnano.17.26

• microscopy (SEM), scanning transmission electron microscopy (STEM), N2 physisorption, and other research methods. Results and Discussion Characterization of DAP-modified zeolite CLIM The chemical compositions of natural zeolite (CLIM) from the San Andrés deposit and its modified forms (CLIMf) with ammonium

• movement. The treatments were applied following a procedure similar to that described in [13][14]. Characterization The elemental composition of CLIM and modified materials resulting from the applied treatments was determined by X-ray fluorescence analysis (XRF), with the exception of nitrogen, which was

• Materials Science and Technology (IMRE) – University of Havana for the characterization of the samples.

Polycatecholamine nanocoatings on stainless steel: the effect on attachment of human fibroblasts and platelets

• Paulina Trzaskowska,
• Ewa Rybak,
• Maciej Trzaskowski,
• Kamil Kopeć,
• Jakub Krzemiński,
• Rafał Podgórski,
• Hatice Genc,
• Mehtap Civelek and
• Iwona Cicha

Beilstein J. Nanotechnol. 2026, 17, 365–380, doi:10.3762/bjnano.17.25

• layers on stainless steel 316L via a novel in situ oxidation process and evaluated their physicochemical properties and cellular interactions at the nano/microscale. Surface characterization revealed that the polymeric coatings formed a homogenous layer with distinct topographical features and thickness

Interconnection morphology effects on the radio frequency response of carbon nanotube sponges

• Manuela Scarselli,
• Javad Rezvani,
• Zeno Zuccari,
• Mattia Scagliotti and
• Simone Tocci

Beilstein J. Nanotechnol. 2026, 17, 343–351, doi:10.3762/bjnano.17.23

• Information File 40: Additional details on CNS preparation, XPS analysis, and antenna characterization. Funding MS would like to acknowledge the INFN (Istituto Nazionale di Fisica Nucleare) MANIFOLD (Multidimensional nANodevice archItectures For lOw-perturbation singLe-ion Detection) grant.

Fast vortex dynamics and relaxation times in NbRe-based heterostructures

• Francesco De Chiara,
• Zahra Makhdoumi Kakhaki,
• Francesco Avitabile,
• Francesco Colangelo,
• Abhishek Kumar,
• Carmine Attanasio and
• Carla Cirillo

Beilstein J. Nanotechnol. 2026, 17, 292–302, doi:10.3762/bjnano.17.20

• characterization The normalized resistive transitions, R/R10K, of the two microbridges are reported in Figure 1a. The critical temperatures are = 6.8 K and = 5.6 K. The obtained values are smaller than those reported for NbRe thin films of similar thickness [19][22], with a stronger reduction observed in the

Advancing nanolithography: a comprehensive review of materials for local anodic oxidation with AFM

• Matteo Lorenzoni

Beilstein J. Nanotechnol. 2026, 17, 275–291, doi:10.3762/bjnano.17.19

• Matteo Lorenzoni Materials Characterization Facility, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy 10.3762/bjnano.17.19 Abstract Local anodic oxidation (LAO), also known as local oxidation nanolithography or oxidation scanning probe lithography has emerged as a versatile

Durable antimicrobial activity of fabrics functionalized with zeolite ion-exchanged nanomaterials against Staphylococcus aureus and Escherichia coli

• Perla Sánchez-López,
• Kendra Ramirez Acosta,
• Sergio Fuentes Moyado,
• Ruben Dario Cadena-Nava and
• Elena Smolentseva

Beilstein J. Nanotechnol. 2026, 17, 262–274, doi:10.3762/bjnano.17.18

• physicochemical characterization of these materials, including metal content, morphology, and structural properties was reported in [4]. Materials characterization The morphology of the fabrics with and without NPs was analyzed by SEM. Images were acquired in a Hitachi SU3500 microscope operating at an

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

• function of the resonance conditions around the ENZ point. The characterization of the linear properties of the samples was done using spectrophotometry and spectral ellipsometry. We studied the nonlinear response with the z-scan technique at different incident irradiances using a Ti:sapphire femtosecond

• the nonlinear response of a Ru/TiO2 multilayered structure as reported in [22]. This sample was designed to have an ENZ point at 800 nm and was fabricated using atomic layer deposition. During the linear characterization of the optical properties, spectral ellipsometry showed that the ENZ point

• tune the material to the laser wavelength rather than the other way around. We make a characterization of the linear optical properties of the samples and present a study of the nonlinear optical properties. For the linear characterization of the samples, we study the absorption using spectrophotometry

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

• and selectivity with an exceptionally low gold loading. Results and Discussion Description and characterization of the carbon supports The morphological and textural properties of the carbon supports are critical for their performance as catalysts in AuNP-supporting systems. To assess these properties

• supports follows the order rGO > AC > CB, making rGO probably the most active and efficient support for NPs. Synthesis and characterization of carbon-supported gold nanoparticles The synthesis of the Au-Cit/carbon and of the Au-SiW9/carbon composites was carried out by the RD method as schematically

• ketones. The corresponding catalytic data and product characterization have been included in Supporting Information File 1. As shown in Table 1, catalysts with CB as support demonstrated lower conversion and yields, while AuNPs supported on AC and rGO achieved nearly complete or complete conversion of the

Micro- and nanoscale effects in biological and bioinspired materials and surfaces

• Thies H. Büscher,
• Rhainer Guillermo Ferreira,
• Manuela Rebora and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2026, 17, 214–217, doi:10.3762/bjnano.17.14

• interdisciplinary forum for exploring emerging trends related to biological and bioinspired surfaces. The topics covered ranged across various aspects of biomimetic research from characterization of biological functions to bioinspired technical applications, with central themes including micro- and nanostructured

• ” consists of 15 articles representing all facets of research on biological and bioinspired surfaces, ranging from experimental and microscopy studies on biological objects, translational approaches with characterization of artificial replicas, bioinspired prototypes to theoretical studies including modeling

• characterization of functional plant tissues [19] integrating experiments and finite element models, and animal tissues [20] incorporating molecular dynamics and finite element methods. Investigating the anisotropic hygroscopic behavior of the involved materials in bending in pine cone scales, Ulrich et al. [19

Safe and sustainable by design with ML/AI: A transformative approach to advancing nanotechnology

• Georgia Melagraki

Beilstein J. Nanotechnol. 2026, 17, 176–185, doi:10.3762/bjnano.17.11

• ecotoxicological endpoints, standardized test methods, and physicochemical characterization protocols, and the development of nano-specific life cycle inventory data suitable for reliable LCAs. Without these foundational elements, even the most sophisticated ML models may yield biased or non-transferable results

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

• ratios for NLb0, NLb1, and NLb2, respectively) were prepared by modified lipid film hydration technique as described in our previous work [18]. The chosen formulations used for these studies were previously optimized and underwent complete characterization, where it was shown that the used amounts of PEG

Development and in vitro evaluation of liposomes and immunoliposomes containing 5-fluorouracil and R-phycoerythrin as a potential phototheranostic system for colorectal cancer

• Raissa Rodrigues Camelo,
• Vivianne Cortez Sombra Vandesmet,
• Octavio Vital Baccallini,
• José de Brito Vieira Neto,
• Thais da Silva Moreira,
• Luzia Kalyne Almeida Moreira Leal,
• Claudia Pessoa,
• Daniel Giuliano Cerri,
• Maria Vitória Lopes Badra Bentley,
• Josimar O. Eloy,
• Ivanildo José da Silva Júnior and
• Raquel Petrilli

Beilstein J. Nanotechnol. 2026, 17, 97–121, doi:10.3762/bjnano.17.7

• Sepharose CL-4B column eluted with PBS (pH 7.4) [19]. 2.3 Sample characterization 2.3.1 Particle size, polydispersity and zeta potential The hydrodynamic vesicle size and polydispersity index (PDI) were performed by dynamic light scattering (DLS), and the zeta potential by electrophoretic light scattering

• force microscopy The topographical characterization of liposomal formulations was performed by using atomic force microscopy (AFM) with a Nanosurf® FlexAFM system. The samples analyzed included liposomes and immunoliposomes containing R-PE. Briefly, to avoid vesicle deformation or disruption, liposomes

• characterization, the selected formulations were 30 days. The samples were kept at 4 °C in plastic containers wrapped in aluminum protected from light, and characterized for vesicle size, PDI, and zeta potential. 2.5.1 Stability of nanoparticles in serum The stability of the nanoparticles in bovine serum was

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

• characterization, particularly micro-FTIR coupled with principal component analysis (PCAn), confirmed the efficiency of the gel and spatially controlled cleaning action. The authors believed that this approach reduces the need for separate treatments and harsh chemicals traditionally used in metal conservation

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

• PANalytical Empyrean diffractometer with a Cu Kα (1.540598 Å) X-ray source. Applied parameters were 45 kV and 40 A. Graphene paper samples were cut to fit the holders. The applied step angle was 0.026261°. Electrical properties characterization The electrical properties (sheet resistance and conductivity) of

• that the interlayer spacing remains relatively stable, while higher temperatures, particularly 800 °C, may lead to partial degradation and increased structural disorder. The obtained rGO paper sheets underwent electrochemical properties characterization; galvanostatic charge–discharge tests were

• the same time, we want to underline that the production of flake graphene materials, their characterization, and the search for further applications are within the scope of the Institute’s activities. The study was partially funded by the Łukasiewicz Research Network – Institute of Microelectronics

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

• oxidation of Cu NPs in ambient air, every sample was kept in a separate vacuum chamber until the AFM measurements. AFM characterization After calibrating the cantilever by either the wedge or the D-LFC method, each sample was immediately measured at the same day. It should be noted that using a sufficiently

• as humidity and temperature, may also have contributed, particularly through enhanced capillary forces between tip and sample during AFM characterization. In general, as the NPs size increases, the lateral force required to push NPs is expected to increase. This expectation is attributed to the

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

• -dispersible UCNPs@lipids solution had a UCNP concentration of 1 mg·mL−1 and was stored at room temperature for subsequent use and characterization. Evidence of obtaining such a water-dispersible solution was previously reported in [40]. Figure 2 compares the as-purchased nanoparticles dispersed in toluene

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

• the synthesis and characterization of polyhedral Zn0.4Fe2.6O4 nanoparticles and their subsequent transformation into Zn0.4Fe2.6O4@MnFe2O4 core–shell nanoparticles with tunable sizes. Previous studies have explored core–shell systems with Co-based shells, but our approach employs MnFe2O4 as the shell

• 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

• collected by centrifugation (10,000 rpm, 10 min), washed twice with ethanol, and redispersed in toluene (10 mL) [7]. Characterization methods Structural characterization of the NPs was performed by X-ray diffractometry (XRD) measurements. X-ray diffraction patterns of NPs (Figure S1, Supporting Information

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

• supramolecular hydrogels present unique challenges in nanoscale morphological characterization because of their fragile fibrous nature and low concentration of the solid component. In this study, imidazolium-based hydrogels containing either diketopyrrolopyrrole (DPP) or zinc(II) phthalocyanine (ZnPc

• ideal for mimicking biological environments, yet these same properties pose major challenges for morphological characterization [6][7]. In particular, conventional electron microscopy often requires dehydration, which risks collapsing the delicate network, while optical methods are typically diffraction

• forms of microscopy have naturally been undertaken, as comprehensive characterization of such systems requires the application of multiple imaging methods. Within the realm of hydrogels, it is typical to see comparative fluorescence and electron microscopy imaging being used to characterize a given

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

• -induced growth of cPNSs in the same year [20]. CPL offers several advantages over the chiral chemical precursors used in the seeded growth approach. First, CPL is traceless. Turning off the CPL removes its influence on the material system, which can simplify the characterization of the material’s

• -beam lithography in the proximity of PNSs. 3. Theoretical and experimental characterization of chiral plasmonic nanostructures Characterizing cPNSs is crucial for informing the synthesis and uses of cPNSs. This section on different characterization techniques will not be restricted to cPNSs created

• ) measures the interaction between electrons and cPNSs upon laser excitation by mapping the EELS within an electron microscope [135] (Figure 8e). In summary, we have reviewed the nanoscale characterization tools correlating structure to chiroptical activity of PNSs in this section. CD and ORD are handy tools

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

• experiments with broadband coaxial dish antennas [31][32]. Future work will focus on the experimental fabrication and characterization of the proposed miniaturized 37-element SRR array to validate these simulation results. Schematic layout of the investigated metamaterial arrays. (a) 19-element array of

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

• either case the NPs will expand. We will, however, demonstrate the role of the ligand conformation. We obtained detailed spatial characterization by SEM, to measure size and shape, and to detect aggregation upon adsorption on surfaces of different hydrophilicity (see Supporting Information File 1