Gold bipyramids as a promising alternative to gold nanorods for analytical and biomedical applications

• Andrey M. Burov,
• Sergey V. Zarkov,
• Arina V. Drozd,
• Igor V. Borisov,
• Elena G. Zavyalova and
• Nikolai G. Khlebtsov

Beilstein J. Nanotechnol. 2026, 17, 1170–1184, doi:10.3762/bjnano.17.80

• . Despite these apparent advantages, BPs remain, in our opinion, undeservedly less popular due to their non-trivial synthesis [23][31][32][33][34][35] and functionalization [36]. Furthermore, simulating the optical properties of BPs (especially when coated with functional molecules) requires numerical

Room-temperature NO₂ sensing performance of ZnO/Ti₃C₂T_x heterojunctions

• Ngo Thi Chau,
• Quoc Vinh Ho,
• Dai Hai Nguyen,
• Phan Khanh Thinh Nguyen and
• Qui Thanh Hoai Ta

Beilstein J. Nanotechnol. 2026, 17, 1159–1169, doi:10.3762/bjnano.17.79

• the bulk system. The elements Zn, O, Ti, and C appear in the spectra, which further confirms that ZnO nanostructures are effectively contained in the composite. Optical properties Raman spectroscopy was performed on selected samples to study their characteristic vibrational modes, as shown in Figure

Biosynthesis, characterization, and biofunctional assessment of niobium oxide nanostructures obtained using lactic acid bacteria-derived supernatants

• Pablo A. Oliveira,
• Gabriella T. L. Teixeira,
• Pollyane S. Oliveira,
• Thaís S. Farnesi-de-Assunção,
• Isabela S. Rotta,
• Karina F. D. Vicentine,
• Dayane S. Alvares,
• Jéferson A. Moreto,
• Aline D. Paiva and
• Natália B. L. Slade

Beilstein J. Nanotechnol. 2026, 17, 1128–1141, doi:10.3762/bjnano.17.77

• (Figure 1a), their presence did not result in significant changes in the optical properties of the nanostructures. For comparison purposes, the UV–vis spectra of the control niobium nanostructures synthesized in the absence of LAB-CFS (Nb-nano) and the isolated LAB-CFS samples were also evaluated

Synthesis of carbon dot-mediated gold nanostructures: experimental and quantum chemical insights into turn-on fluorescence sensing of N-acetylcysteine

• Thuy-Huong Nguyen,
• Van-Nghia Nguyen,
• Ha Thi Thu Nguyen,
• Ha Ngoc Nguyen,
• Anh Duc Nguyen,
• Tuyen Viet Nguyen and
• Truong Xuan Nguyen

Beilstein J. Nanotechnol. 2026, 17, 1103–1116, doi:10.3762/bjnano.17.75

• and optical properties of the nanocomposite were comprehensively characterized using various analytical techniques. The intrinsic fluorescence of NCDs was significantly quenched upon formation of the composite, mainly due to non-radiative energy transfer processes. Interestingly, the quenched

• optical properties, large specific surface area, excellent biocompatibility, and ease of surface functionalization [33]. A key feature of gold nanoparticles is their surface plasmon resonance, which generates strong light–matter interactions, amplifies optical signals, and underpins their extensive

Nanoglasses: a trail towards uncharted regions of vitreous materials and their properties?

• Gerhard Wilde and
• Horst Hahn

Beilstein J. Nanotechnol. 2026, 17, 1047–1062, doi:10.3762/bjnano.17.72

Synthesis and characterization of RF-sputtered ZnTe/Cu_2−xTe thin films for solar cell applications

• Gerardo Arreola Jardón,
• Susana Meraz Dávila,
• Claudia Elena Pérez García,
• Aime Margarita Gutiérrez Peralta and
• Sergio Joaquín Jiménez Sandoval

Beilstein J. Nanotechnol. 2026, 17, 1016–1027, doi:10.3762/bjnano.17.69

• phases across the film thickness. The presence of Cu7Te5 throughout the depth supports the compositional inhomogeneity observed by SEM and Raman analysis. Optical properties The optical properties of the CuZnTeO films are strongly influenced by the nominal Cu and O concentration. Figure 6 shows the

Cross-scale design of chemosensor arrays: from molecular self-assembly in water to paper-based devices for metal ion detection

• Yui Sasaki and
• Tsuyoshi Minami

Beilstein J. Nanotechnol. 2026, 17, 828–838, doi:10.3762/bjnano.17.59

• bond chemistry require organic synthetic approaches in the chemosensor preparations [6][7][8][9]. Meanwhile, molecular self-assembly serves as a driving force for easy-to-obtain chemosensors through spontaneous preparation without a synthetic burden [17]. Moreover, the optical properties of

• requirements: They must exhibit different optical properties depending on the types of metal ions and their concentrations to obtain fingerprint-like response patterns, and they must be highly soluble [17]. Typical chemosensor molecules are covalently linked among the binding sites for analytes, optical units

• (chromophores and fluorophores), and manipulator units, if necessary (Figure 2A) [42]. To construct a chemosensor array, the variation of optical properties is significant, while the modification of chemosensor properties is limited by the synthetic effort required. Molecular self-assembly is a valid approach

Glycerol photoelectrochemical oxidation reaction at carbon nitrides/BiVO₄ materials

• Charles Garcia da Cunha,
• Isabelle M. D. Gonzaga,
• Cristian Hessel,
• Izadora F. Reis,
• Ivo F. Teixeira,
• Lucia H. Mascaro and
• Elton Sitta

Beilstein J. Nanotechnol. 2026, 17, 806–817, doi:10.3762/bjnano.17.57

• acquired from 10° to 80° at a rate of 2°·min−1 with a step size of 0.02°. Morphological features and elemental composition were determined by field-emission scanning electron microscopy (FEG-SEM; Zeiss Supra35) coupled with energy-dispersive X-ray spectroscopy (EDS), operating at 15 kV. Optical properties

Tailoring Ag–Pt nanoalloys through solid-state dewetting: structural and optical insights

• Marcin Łapiński,
• Piotr Okoczuk,
• Blaž Grobiša,
• Ewa Pawlikowska,
• Amelia Rozwadowska,
• Wojciech Sadowski and
• Barbara Kościelska

Beilstein J. Nanotechnol. 2026, 17, 748–759, doi:10.3762/bjnano.17.52

• boundary between these two classes is not always clearly defined. Examination properties, such as optical properties, can provide a valuable criterion for differentiation. In plasmonic materials, in most cases, nanocomposites exhibit two distinct resonance peaks, each corresponding to one of the

• (GIS). The final thinning of the samples was conducted by gradually reducing the acceleration voltage to 2 kV, thereby minimizing Ga-induced defects. The formation of the nanoalloys was confirmed by measuring their optical properties, with particular emphasis on plasmonic behavior. These properties

Environmental applications of silver nanoparticles: state-of-the-art review and emerging trends

• Soni Prajapati,
• Akash Kumar and
• Ranjana Singh

Beilstein J. Nanotechnol. 2026, 17, 697–736, doi:10.3762/bjnano.17.49

• environmental monitoring and remediation. For example, the optical properties of AgNPs are primarily governed by localised surface plasmon resonance (LSPR ), which occurs in the 380–450 nm region and depends on the nanoparticles’ size and shape. The unique optical properties of nanosilver were utilised to

• Soni Prajapati Akash Kumar Ranjana Singh Department of Biochemistry, King George’s Medical University, Lucknow, India Academy of Scientific and Innovative Research, Ghaziabad, India 10.3762/bjnano.17.49 Abstract Silver nanoparticles (AgNPs) possess inherent catalytic, antimicrobial, and optical

• properties, making them a strong candidate for environmental applications in water, air, and soil. Indeed, various reviews are available, though a significant gap persists in addressing all environmental pollutants. This review comprehensively and critically analyses the advancement in AgNP research spanning

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

• extended by the addition of a thienyl motif between the benzothiadiazole and the fluorene, thus considerably redshifting its absorption and emission compared to dye 1. Optical properties of the nanoparticles Despite the seemingly minor differences between dye 1 and 2, they differ significantly in their

• optical properties in solution, and in those of their associated nanoparticles, as illustrated in Figure 1 and Table 1. dFONs(1) were prepared from dye 1 and emit around 595 nm with a fluorescence quantum yield of 0.33, while dFONs(2), prepared from dye 2, emit around 689 nm with a lower quantum yield of

Decontamination from water pollutants and pathogens by electrospun nanofibers doped with heavy-atom-free borafluorene-BODIPY photosensitizers

• Angelika Zaszczyńska,
• Paulina H. Marek-Urban,
• Karolina Wrochna,
• Agnieszka E. Kuklewska,
• Kacper Kręgielewski,
• Marta Grodzik,
• Dawid R. Natkowski,
• Jolanta Mierzejewska,
• Ewa Iwanek,
• Agata Blacha-Grzechnik,
• Paweł Sajkiewicz and
• Krzysztof Durka

Beilstein J. Nanotechnol. 2026, 17, 668–682, doi:10.3762/bjnano.17.46

• , respectively. The surface polarity (Xp) was determined using Wu’s method (Equation 5), with γs being the total surface free energy: Optical properties The absorbance of the polymeric nonwovens doped with 1 was measured with an Evolution One Plus UV–vis spectrophotometer (Thermo Fisher Scientific) equipped with

Cellulose as a photocatalyst support material: extraction, structural features, and environmental applications

• Yee Teng Lim,
• Nur Farhana Jaafar,
• Azizul Hakim Lahuri and
• Endang Tri Wahyuni

Beilstein J. Nanotechnol. 2026, 17, 635–652, doi:10.3762/bjnano.17.44

• degradation of pollutants [19]. In addition, the optical properties of transparent cellulose-based thin films enhance photocatalytic efficiency as their ability to transmit UV or visible light ensures greater light penetration, which in turn improves electron distribution and transfer to the TiO2 surface

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

• UV–vis, ATR-FTIR, XPS, XRD, and Raman measurements, complemented by TGA and TEM to assess optical properties, surface chemistry, and structural and morphological features. Additionally, gold nanoparticles (AuNPs) were photochemically deposited onto Agro-GO to evaluate its potential for nanotechnology

• , 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

• precursor and the processing conditions. This tunability provides a powerful means to tailor the structural and optical properties of AuNP@GO hybrids. Beyond its alignment with environmental sustainability goals, this approach provides a versatile, customizable platform for precisely modulating nanomaterial

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

• tuning NP size, crystallinity, defects, and optical properties. Conventional batch PLAL setups often exhibit lower productivity than large-scale chemical or gas-phase syntheses; however, recent advances using megahertz-repetition-rate lasers and continuous-flow configurations have significantly increased

• . have demonstrated that the optical properties of Si/Au NPs, their structure, as well as their chemical composition can be modified by defocusing [143]. Defocusing 0.5 mm inside the target led to enhanced chemical stability of the colloids and increased concentration. Moreover, NP size control could be

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

• , Université de Technologie de Troyes, 10004 Troyes, France EUT+ Institute of Nanomaterials and Nanotechnologies-EUTINN, European University of Technology, European Union 10.3762/bjnano.17.17 Abstract In this work, we present the design, fabrication, and study of the optical properties of multilayered metal

• of light. As a consequence, light does not differentiate between the constituting materials and only “sees” them as a single material. To study the interaction of light with these metamaterials, we use the effective media approximation to calculate the optical properties of these materials. These

• 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

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

• bioinspired surfaces and their tribological characteristics (friction, wear resistance, and adhesion), as well as self-cleaning and optical properties, underscoring the overarching aim of the symposium to integrate biological phenomena and materials science towards biomimetic approaches. The fruitful

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

• thickness, and thermal treatment conditions. The observed changes in optical properties suggest that this response is governed by temperature-induced modulation of molecular ordering and aggregation state, which in turn alters the electronic transitions responsible for light absorption. Theoretical

• the molecular assembly governs birefringence in PAZO remains incomplete, leaving open questions about the fundamental mechanisms driving the observed photoresponsive behavior. This knowledge gap serves as the primary motivation for the present study. Here, we investigate the optical properties of PAZO

• Kasha) is based on the optical properties of the aggregates arising from the different molecular packing patterns. H-aggregates are usually characterized by side-by-side (cofacial) “sandwich” orientations of the monomeric chromophores, and the main absorption peak is generally blueshifted (“H” for

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

• optical properties [112][113]. The absorption and scattering of a spherical particle are described using Mie theory [114], which solves Maxwell’s equations to predict how light interacts with the particle with a multipole expansion of the EM fields. For ellipsoids that are much smaller than the wavelength

• method, the finite element method, and the boundary element method are used to describe the optical properties of PNS. Numerous comprehensive review articles exist to compare different simulation methods, so we will not delve into detail here. To understand how structural chirality forms using CPL

• that the shape of the metal seeds and the experimental conditions, such as depositing the seeds on a substrate or dispersing them in a solution, affect the distribution of hot carriers and the dissymmetry of the resulting chiral cPNSs. Simulations have also been conducted to understand the optical

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

• sensitivity, specificity, rapid detection, and the ability for real-time analysis. CD- and QD-based biosensors with excellent optical properties such as photoluminescence enable the detection of VB12 at negligible concentrations and in real-world samples with complex matrices. Furthermore, integrating these

• output, utilizing the optical properties of the signal such as fluorescence, absorbance, refractive index, and Raman scattering for quantification and evaluation. The most prevalent types of optical sensing include colorimetric, plasmonic, fluorescence, and spectrophotometric methods due to their ease 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

• century [3]. They are investigated, for example, regarding drug delivery [4], but they are also parts of actual products, for example, of sensors [5]. All this is based on the ease of synthesis, chemical stability, size tuneability, and unique optical properties [6]. The extreme dependence of the

Laser ablation in liquids for shape-tailored synthesis of nanomaterials: status and challenges

• Natalie Tarasenka

Beilstein J. Nanotechnol. 2025, 16, 1963–1997, doi:10.3762/bjnano.16.137

• development of such fields as energy generation and storage, sensing, and catalysis. Another application area of nonspherical NPs stems from the shape dependencies of their optical properties. The shift of plasmonic bands to the near-infrared spectral range observed for high-aspect-ratio nanostructures, such

Multifunctional anionic nanoemulsion with linseed oil and lecithin: a preliminary approach for dry eye disease

• Niédja Fittipaldi Vasconcelos,
• Almerinda Agrelli,
• Rayane Cristine Santos da Silva,
• Carina Lucena Mendes-Marques,
• Isabel Renata de Souza Arruda,
• Priscilla Stela Santana de Oliveira,
• Mércia Liane de Oliveira and
• Giovanna Machado

Beilstein J. Nanotechnol. 2025, 16, 1711–1733, doi:10.3762/bjnano.16.120

• nanoemulsion its characteristic milky opaque appearance. Similar optical properties have been documented in the literature for lecithin-based nanoemulsions with droplet sizes of approximately 150 nm [21][107]. The OphtNE-3.66%(K1%) nanoformulation appeared more translucent than the OphtNE-3.70% nanoformulation

Transient electronics for sustainability: Emerging technologies and future directions

• Jae-Young Bae,
• Myung-Kyun Choi and
• Seung-Kyun Kang

Beilstein J. Nanotechnol. 2025, 16, 1545–1556, doi:10.3762/bjnano.16.109

• germanium-based alloys with various metals, as well as emerging heterostructure systems, to achieve tailored electronic and optical properties suited for diverse transient device architectures. Bioresorbable metals are also regarded as essential components for interconnects and electrodes in transient

Influence of laser beam profile on morphology and optical properties of silicon nanoparticles formed by laser ablation in liquid

• Natalie Tarasenka,
• Vladislav Kornev,
• Alena Nevar and
• Nikolai Tarasenko

Beilstein J. Nanotechnol. 2025, 16, 1533–1544, doi:10.3762/bjnano.16.108

• . Optical characterization The optical properties of Si NPs dispersed in ethanol were investigated using Raman and UV–vis spectroscopy. Initially, Si NPs obtained using Bessel, annular, and Gaussian laser beams were characterized by Raman spectroscopy, and their Raman spectra (vibrational modes) were

• laser beams also showed different optical properties, which were characterized using UV–vis absorption and PL spectroscopies. The absorption spectra of the Si colloids prepared using Gauss, Bessel, and annular profiles are shown in Figure 6. In all the spectra, absorption in the visible and near

• -infrared regions has been detected. However, as can be concluded from Figure 6a, the absorption cutoff wavelength differs for each studied sample, indicating different optical and electronic properties of the formed nanostructures. The variation of the optical properties can be caused by structural