Molecular engineering of individual dye-based nanoparticle photostability for ultrabright two-photon fluorescence

• Eleonore Kurek,
• Sasha Cooper,
• Alexandre Clausolles,
• Karen Perronet,
• Jonathan Daniel,
• Mireille Blanchard-Desce and
• François Marquier

Beilstein J. Nanotechnol. 2026, 17, 688–696, doi:10.3762/bjnano.17.48

• ], and even up to 3 near an absorption resonance [35], α is between 2 and 13. We point out the fact that local fields exist also in the measurements of σ2 and Φ from Table 1. The corrections change, however, depending on the dFONs environment. As a result, the values of α measured in the paper cannot be

Two-step laser synthesis of Ag@TiO₂ nanomaterials for the photocatalytic degradation of rhodamine B

• Marija Kovačević,
• Miloš Tošić,
• Rafaela Radičić,
• Vladimir Rajić,
• Nikša Krstulović,
• Miloš Momčilović and
• Sanja Živković

Beilstein J. Nanotechnol. 2026, 17, 622–634, doi:10.3762/bjnano.17.43

• resonance effects and facilitates the formation of Schottky barriers at the metal–semiconductor interface, both of which contribute to an extended light absorption range and enhanced charge carrier separation. The improved activity is primarily attributed to the narrowing of TiO2’s effective bandgap and the

• photocatalytic activity. The improved activity of Ag@TiO2 is not mainly due to bandgap reduction. It is more likely related to Ag–TiO2 interaction, where Ag reduces electron–hole recombination and enhances light absorption through surface plasmon resonance, leading to increased formation of reactive oxygen

Recent progress in enhancing built-in electric fields of perovskite solar cells via junction engineering

• Tong Xiao and
• Ke Xu

Beilstein J. Nanotechnol. 2026, 17, 602–621, doi:10.3762/bjnano.17.42

Impacts of annealing on structural and photophysical properties of zinc phthalocyanine adsorbed on graphene

• Gautier Creutzer,
• Quentin Fernez,
• Nataliya Kalashnyk,
• Zohreh Safarzadeh,
• Lydia Sosa Vargas,
• Céline Fiorini-Debuisschert,
• Nicolas Fabre and
• Fabrice Charra

Beilstein J. Nanotechnol. 2026, 17, 576–585, doi:10.3762/bjnano.17.39

• nm are reported in Figure 2. Only ZnPc and graphene absorb at this excitation wavelength and can emit a resonantly enhanced Raman scattering detectable even at the monolayer level. On the contrary, TSB35-C12 is driven far from its resonance (its absorption starts at wavelengths shorter than 350 nm

Fractional shot noise of an SU(N) Kondo system

• Damian Krychowski and
• Stanisław Lipiński

Beilstein J. Nanotechnol. 2026, 17, 515–540, doi:10.3762/bjnano.17.34

• dot (N-QD) in the Kondo regime. Using the Kotliar–Ruckentein slave boson approach (SBMFA) for an N-level Anderson model, we define effectively noninteracting quasiparticles of the SU(N) Kondo system (N = 2, 3, 4, 5, 6). Kondo resonance transmission coefficients determine linear noise describing

• -symmetry Kondo effects in nanostructures is the fact that Kondo temperatures dramatically increase with degeneracy and take on values that are experimentally accessible [15]. At the same time, the Kondo resonance peak remains narrower than Coulomb resonances. This makes SU(N) Kondo systems attractive for

• expressed by transmission, for the case of interacting electrons appropriately renormalized [53]. For Kondo-correlated systems, it is the many-body Kondo resonance forming at the Fermi level that enables perfect electron transmission. In the Kondo regime, conductance and many other quantities exhibit

Probing internal continua and atomic ultrafast charge transfer within size-controlled nanoparticles by post-collision interaction in core-hole clock spectroscopy

• Johannes Lütgert,
• Erika Giangrisostomi,
• Nomi L. A. N. Sorgenfrei and
• Alexander Föhlisch

Beilstein J. Nanotechnol. 2026, 17, 505–514, doi:10.3762/bjnano.17.33

• comparison, relative charge transfer rates, each normalized to the charge transfer rate of the DL15 sample, at various photon energies are depicted in Figure 2b. Just above the resonance, these times are of the order of a few hundred attoseconds. For photon energies of 2475 eV and above, the charge transfer

• higher kinetic energies at photon energies close to the resonance. While asymmetries towards lower kinetic energies are typical for photoemission spectroscopy and are readily explained by various energy loss processes, this kind of behavior requires some process resulting in energy gain. Typically, the

• asymmetry appears to vanish and drastically deviates from the PCI trend. Based on the photon energy, this region corresponds to excitations into the atomic S 3p resonance. The localized nature of this resonance becomes further evident by the significantly enhanced intensity of the Raman feature (Figure 5

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

• resonance (LSPR) band centered at 522 nm, indicative of small and well-dispersed AuNPs in colloidal suspension. AuNPs grown on GO substrates showed redshifted LSPR bands in the range of 526–531 nm, accompanied by notable spectral broadening. These features are attributed to interactions between AuNPs and

• agroindustrial waste-derived samples (Agro-GOP, Agro-GOX, and Agro-GOC). UV–vis spectra of AuNPs and AuNPs supported on GO samples. The plasmon resonance peak appears at 522 nm for AuNPs and is redshifted (526–531 nm) in the hybrids, indicating interaction with the GO surface. TEM images of AuNP-decorated GO

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

• be somewhat alleviated by doing the measurements under resonance conditions, which leads to activation of a large number of peaks. Another major issue is that one cannot directly read out the identity of a defect from the spectrum; instead, comparison to reference spectra is required. Such

• (described in the section before) for other 2D systems is a challenge. The advantages of graphene are the high Raman frequencies, the simplicity of the spectra, and the electronic resonance conditions, which are not always as favorable in the case of other 2D materials. However, several authors are

• resonant Raman is much more demanding as it should correctly describe the changes in the energy of electronic states and the transition dipoles. In addition, the largest resonance effects are usually seen at energies where polarizability changes quickly, that is, where it is most sensitive to the atomic

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

• theranostic applications [39] by facilitating tumor visualization through various imaging techniques [40], including fluorescence imaging [41], computed tomography [42], and magnetic resonance imaging (MRI) [43]. The development of nanobiotechnology in PDT opens new horizons for creating more effective and

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

• the design of resonance antennas with dimensions down to one fiftieth or less of conventional metallic resonance antennas [4]. In addition, the electrons can travel freely along the 1D length of the tubes but not in the transverse direction, so that the high-frequency skin effect usually observed in

• from the as-grown CNS sample and the film of MWCNTs grown on a Si substrate as comparison (Figure 1). We observed that both samples have a resonance peak; for the CNT film, it is S11 = −23.0 dB at 4.40 GHz, and for the CNS sample, it is S11 = −22.6 dB at 4.78 GHz. The result found for the MWCNT film is

• case, while the CNS sample is self-standing, the CNT film was grown on a silicon substrate, and the combination of a substrate and slight differences in the growth parameters explains the discrepancy in resonance peak position. The CNS sample also shows an additional resonance at 8.8 GHz with S11 = −34

Beam shaping techniques for pulsed laser ablation in liquids: Unlocking tunable control of nanoparticle synthesis in liquids

• Sergio Molina-Prados,
• Nadezhda M. Bulgakova,
• Alexander V. Bulgakov,
• Jesus Lancis,
• Gladys Mínguez Vega and
• Carlos Doñate-Buendia

Beilstein J. Nanotechnol. 2026, 17, 309–342, doi:10.3762/bjnano.17.22

• neutron capture therapy [62][63], viral [64][65] and microbial growth inhibition [42][66], antibacterial agents [67][68], anticancer treatments [67][69], magnetic resonance imaging contrast agent [70], photothermal therapy [71][72], cell imaging [73], proton therapy enhancement [74][75], fluorescence [76

• pulse energies of 15 and 25 mJ (fluences of 34 and 56 mJ·cm−2). As seen in Figure 15a, at 15 mJ, the standard beam has minimal impact on NP size, with the surface plasmon resonance (SPR) peak at 390 nm remaining weak even after 60 min of irradiation. In contrast, the diffused beam at the same energy

Calculation of the dynamic stiffness of a cantilever under torsional oscillation

• Keita Nishida,
• Yuuki Yasui and
• Yoshiaki Sugimoto

Beilstein J. Nanotechnol. 2026, 17, 303–308, doi:10.3762/bjnano.17.21

• , where the tip has a negligible moment of inertia (μ = 0) and is at x = L. The boundary conditions are θ(0, t) = 0 (no torsion) and Ctθ′(L, t) = 0 (no torque) [27]. With these conditions, we obtain where is the resonance angular frequency for the n-th eigenmode [28][29]. Figure 1c shows the deformation

• -th oscillation mode, and is the effective moment of inertia. The dynamic stiffness and the effective moment of inertia are then given by where kstatic is the static stiffness defined by kstatic = Ct/L. The resonance angular frequencies obtained as are equal to those defined for Equation 3. Dynamic

• (x, t) for 0 ≤ x ≤ l and θright(x, t) for l < x ≤ L. The boundary conditions [25] are The equation of motion yields where the parameters αn(l, μ) are the positive solutions of in ascending order, and is the resonance angular frequency for the n-th eigenmode. The resonance angular frequency becomes

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

• only relevant component is ; hence, we only calculate this component. We wish to produce samples with four metal–dielectric periods that have different ENZ wavelength values (λ = 740, 760, 780, 800, 820, 840, and 860 nm) to test the effect of the resonance conditions with the laser wavelength on the

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

• gold nanoparticle suspension. The presence of AuNPs was confirmed by the appearance of a localized surface plasmon resonance (LSPR) band in the visible wavelength range, with a maximum absorbance at λmax = 519 nm (Figure 4a). The hydrodynamic radius (HD) by number-weighted distribution of dynamic light

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

• drying for 15 min at room temperature. The analyses were conducted in air, using the tapping mode to prevent damage to the sample surface, by using a PPP-NCSTAu probe (Nanosensors®, Switzerland), with frequency resonance of 125 kHz and spring constant of 5.0 N/m. The scan rate was 1.5 s per line. The

Microscopic study of the intermediate mixed state in intertype superconductors

• Vyacheslav D. Neverov,
• Alexander V. Kalashnikov,
• Andrey V. Krasavin and
• Alexei Vagov

Beilstein J. Nanotechnol. 2026, 17, 57–62, doi:10.3762/bjnano.17.5

• eigenstates, and f(E) is the Fermi–Dirac distribution function. The electron density is kept constant at ne = 0.25 throughout all calculations by adjusting the chemical potential μ. Notice that the system is well away from the resonance at ne = 1 and, at the chosen value, the electronic dispersion is well

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

• junctions in this work are as follows: Ic = 110 μA, C = 300 fF, Lshunt = 1.5 pH, and Rshunt = 1.9 Ω. For this set of parameters there is a bump on the single junction IVC at a voltage of approx. 0.5 mV caused by an LC resonance between the shunt inductance and the junction capacitance. Since the

• corresponding resonance frequency is below the operating range of the samples, we will not discuss these effects here. At certain parameter values, the IVC of the single JJ exhibits a number of features that can be quantitatively described by the RLCSJ model, as shown in [38][45][46]. The image of 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

• unique magnetic properties, small size, and biocompatibility, which enable them to be used in a wide range of biomedical applications. These applications include magnetic resonance imaging, magnetic separation, targeted drug delivery, and hyperthermia [1][2]. Magnetic hyperthermia has been extensively

Geometry-controlled engineering of the low-temperature proximity effect in normal metal–superconductor junctions

• Munisa A. Tomayeva,
• Vyacheslav D. Neverov,
• Andrey V. Krasavin,
• Alexei Vagov and
• Mihail D. Croitoru

Beilstein J. Nanotechnol. 2025, 16, 2265–2273, doi:10.3762/bjnano.16.155

• being in resonance with the peak in the single-particle density of states at ne = 1. The order parameter Δij = Δiδij and the Hartree potential Ui are determined from the self-consistency equations. For the order parameter, we have [50] where Fi is a pair amplitude, and for the Hartree potential with

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

• ][101][102]. When the localized surface plasmon resonance of metal seeds is excited, hot electrons reduce Ag+ or from solution and deposit metallic Ag and Au. However, various studies in the past two decades on the plasmon-mediated reduction of Ag(I) and Au(III) have demonstrated a weak dependence 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

• biosensing platforms in detecting Co2+ ions and VB12 using RNA aptamer–gold nanoparticles colorimetric sensors, surface plasmon resonance sensors, chemiluminescence and electrochemiluminescence biosensors, and fluorescence biosensors (i.e., chemosensors, nanoclusters/nanoparticles-based sensors, and carbon

• (POC) diagnostics for different disorders and diseases. Resonance among the free electrons at the surface of colloidal AuNPs, induced by the interaction with light energy, causes the light to be absorbed in the blue-green and red parts of the visible spectrum. Consequently, the appearance of colors in

• distinct spectral absorption response. Specifically, the derived compound of 3-((2-hydroxynaphthalen-1-yl)diazenyl)-2-(styryl)quinazolin-4(3H)-one emerged as a rapid tool for the determination of Co2+ (λmax = 582 nm) and Fe2+ (λmax = 566 nm) in water. Surface plasmon resonance-based biosensors Surface

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

• -established magnetic metamaterial element whose resonant properties are governed by its internal inductance and capacitance, allowing for a strong magnetic response and associated current loops at the designed resonance frequency. The simulations of the metamaterial arrays were performed in the time-domain

• central frequency [20]. More importantly, it yielded a 1.5-fold increase in the total absorbed power. The amplitude–frequency characteristics (AFC) for the simulated single-ring and SRR designs are presented in Figure 2. For the single-ring array, the absorbed power in the first resonance maximum reached

• in the SRR dimensions and the array period by 20% led to a broadening of the absorption bandwidth and a small shift of the first resonance maximum towards higher frequencies. A further reduction of dimensions by 40% resulted in an even wider bandwidth; however, the peak absorbed power began

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

• = 3 N/m, a resonance frequency f = 75 kHz, and a nominal radius of less than 10 nm were used for the experiments on the hydrophilic surfaces. These conditions are referred to as “hydrophilic conditions”. The visualization of particles on hydrophobic surfaces was achieved by employing gold-coated

Electron transport through nanoscale multilayer graphene and hexagonal boron nitride junctions

• Aleksandar Staykov and
• Takaya Fujisaki

Beilstein J. Nanotechnol. 2025, 16, 2132–2143, doi:10.3762/bjnano.16.147

• /graphene with Stone–Wales defect/Pt junctions with six layers, which are shown in Figure 7A and Figure 7B, respectively. The transmission spectra are plotted for an applied bias of 0.8 V. The bias window is denoted with dashed lines. Figure 7A shows two distinct, sharp, resonance peaks in the bias window

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

• nanoscale [1][2][3][4][5]. Among its various operating modes, tapping mode AFM is particularly prevalent due to lateral force minimization and its ability to give phase-contrast images of heterogeneous surfaces [6]. This mode involves oscillating the cantilever near its resonance frequency with the tip

• record its thermal vibration power spectral density. A fit to the fundamental resonance peak, based on the equipartition theorem, yielded the spring constant. Characterization of higher eigenmodes The resonant frequencies of the higher eigenmodes were characterized by performing a frequency sweep using

• excite the probe in our innovative multifrequency AFM mode. The efficacy of this approach relies on two synergistic mechanisms. First, when the probe contacts the sample surface, tip–sample interaction forces induce a rapid resonance frequency shift and amplitude attenuation in the higher eigenmodes