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

• solid-state situation of the spin probe. In ESR, one always plots the first derivative of absorption spectra, which means that the magnetic susceptibility χ is proportional to the second integral of the curves, that is, proportional to the area of absorption signals. No correlation exists between χ and

Electrical, photocatalytic, and sensory properties of graphene oxide and polyimide implanted with low- and medium-energy silver ions

• Josef Novák,
• Eva Štěpanovská,
• Petr Malinský,
• Vlastimil Mazánek,
• Jan Luxa,
• Ulrich Kentsch and
• Zdeněk Sofer

Beilstein J. Nanotechnol. 2025, 16, 1794–1811, doi:10.3762/bjnano.16.123

• and exposed to UV light (254 nm, 40 W) for 180 min. Subsequently, the rhodamine B concentration and disintegration were examined using absorption spectra via a UVISEL ellipsometer (75 W Xe lamp, Horiba, France) in the 450–650 nm wavelength range with a 1 nm step. The ellipsometer beam spot size was 1

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

• absorption spectra of the prepared colloids were measured using a Cary 500 Scan spectrophotometer (Varian, USA) in the spectral range of 200–2000 nm in a 10 mm quartz cuvette. The measurements of the PL spectra were carried out at room temperature using a Fluorolog-3 spectrofluorometer (HORIBA Scientific

• 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

• ethanol using Bessel, annular, and Gaussian laser beams. (a) UV–vis absorption spectra and (b) Tauc plots. Photoluminescence spectra of (a) Si NPs prepared by Bessel, Gaussian, and annular laser beam ablation under excitation at 265 nm and of (b) Si NPs prepared by Bessel laser beam ablation under

Cross-reactivities in conjugation reactions involving iron oxide nanoparticles

• Shoronia N. Cross,
• Katalin V. Korpany,
• Hanine Zakaria and
• Amy Szuchmacher Blum

Beilstein J. Nanotechnol. 2025, 16, 1504–1521, doi:10.3762/bjnano.16.106

Laser processing in liquids: insights into nanocolloid generation and thin film integration for energy, photonic, and sensing applications

• Akshana Parameswaran Sreekala,
• Pooja Raveendran Nair,
• Jithin Kundalam Kadavath,
• Bindu Krishnan,
• David Avellaneda Avellaneda,
• M. R. Anantharaman and
• Sadasivan Shaji

Beilstein J. Nanotechnol. 2025, 16, 1428–1498, doi:10.3762/bjnano.16.104

Photochemical synthesis of silver nanoprisms via green LED irradiation and evaluation of SERS activity

• Tuan Anh Mai-Ngoc,
• Nhi Kieu Vo,
• Cong Danh Nguyen,
• Thi Kim Xuan Nguyen and
• Thanh Sinh Do

Beilstein J. Nanotechnol. 2025, 16, 1417–1427, doi:10.3762/bjnano.16.103

• ; and (iii) a strong in-plane dipole (IPD) peak at 654 nm, characteristic of silver nanoprisms. This observation is consistent with the characteristic UV–vis absorption spectra of AgNPrs reported in previous studies [2][4][7]. The simultaneous presence of these three plasmonic modes, along with the

Enhancing the photoelectrochemical performance of BiOI-derived BiVO₄ films by controlled-intensity current electrodeposition

• Huu Phuc Dang,
• Khanh Quang Nguyen,
• Nguyen Thi Mai Tho and
• Tran Le

Beilstein J. Nanotechnol. 2025, 16, 1289–1301, doi:10.3762/bjnano.16.94

• . Characteristics of materials X-ray diffraction (XRD, Bruker D8 Advance) and Raman spectroscopy (LabRAM Odyssey Semiconductor) were used to analyze the crystal structures of photoanodes. UV–vis absorption spectra were obtained using a Cary 60 spectrophotometer. X-ray photoelectron spectroscopy (XPS, VG ESCALAB250

Electronic and optical properties of chloropicrin adsorbed ZnS nanotubes: first principle analysis

• Prakash Yadav,
• Boddepalli SanthiBhushan and
• Anurag Srivastava

Beilstein J. Nanotechnol. 2025, 16, 1184–1196, doi:10.3762/bjnano.16.87

• . Notably, the recovery time of ZnS NT for orientation A is estimated as 3.5 μs at 300 K, the fastest among all previous works related to CP adsorption listed in Table 5, underscoring its exceptional potential for real-time sensing applications. Optical properties The absorption spectra shown in Figure 5 of

• highlighting the suitability of ZnS nanostructures for UV photodetectors, sensors, and photocatalytic applications, where high UV sensitivity is critical [69]. Upon CP molecule adsorption, significant redshifts in the absorption spectra are observed across all orientations, indicative of bandgap narrowing

• broader spectral sensitivity, making Orientation C a versatile configuration for applications requiring multi-wavelength optical detection. Orientation D, on the other hand, shows absorption spectra similar to that of pristine ZnS NT, with only a slight redshift and weak absorption in the visible range

Fabrication of metal complex phthalocyanine and porphyrin nanoparticle aqueous colloids by pulsed laser fragmentation in liquid and their potential application to a photosensitizer for photodynamic therapy

• Taisei Himeda,
• Risako Kunitomi,
• Ryosuke Nabeya,
• Tamotsu Zako and
• Tsuyoshi Asahi

Beilstein J. Nanotechnol. 2025, 16, 1088–1096, doi:10.3762/bjnano.16.80

• in solution. Similar results were obtained for other MPcs and PtOEP prepared in 0.1 wt % F-127 aqueous solution (Figure S1, Supporting Information File 1). The absorption spectra of the nanoparticle colloids are shown in Figure 3, and some characteristics of the colloids are summarized in Table 1

• degradation may occur during nanoparticle fabrication via PLAL. To investigate molecular degradation, the prepared nanoparticles were dissolved in organic solvents and their visible to NIR absorption spectra were measured. The spectra agreed well with those of the raw material compounds, confirming that at

• dispersion stability in PBS, 0.2 mL of the prepared colloids was put in 1.8 mL of PBS, and then the absorption spectra were measured after one week. In the case of AlClPc, nanoparticle colloids were efficiently formed, even in pure water suspensions, and the absorption spectra of the prepared nanoparticle

A calix[4]arene-based supramolecular nanoassembly targeting cancer cells and triggering the release of nitric oxide with green light

• Cristina Parisi,
• Loredana Ferreri,
• Tassia J. Martins,
• Francesca Laneri,
• Samantha Sollima,
• Antonina Azzolina,
• Antonella Cusimano,
• Nicola D’Antona,
• Grazia M. L. Consoli and
• Salvatore Sortino

Beilstein J. Nanotechnol. 2025, 16, 1003–1013, doi:10.3762/bjnano.16.75

• involving this chromophore and the encapsulated 2. As far as the mechanism of this process is concerned, both singlet–singlet and triplet–triplet energy transfers are ruled out based on the following. Based on the absorption spectra of the ABF and 2, the lowest singlet state of ABF can be estimated to be

• effects and cellular uptake of the nanoassembly of 1 (0.5 μM) in HuDe cells (A, C) and MCF7 cells (B, D). Green: nanoassembly of 1; blue: DAPI stain to visualize nuclei. Scale bar = 50 µm. (A) Absorption spectra of NOPD 2 (a) and the non-nitrosated analogue 2b (b) in water. (B) Absorption spectral changes

Synthesis of biowaste-derived carbon-dot-mediated silver nanoparticles and the evaluation of electrochemical properties for supercapacitor electrodes

• Navya Kumari Tenkayala,
• Chandan Kumar Maity,
• Md Moniruzzaman and
• Subramani Devaraju

Beilstein J. Nanotechnol. 2025, 16, 933–943, doi:10.3762/bjnano.16.71

• absorption spectra of PG-CDs-AgNPs at different time intervals. (c) Excitation–emission PL spectra of PG-CDs-AgNPs. (d) Excitation–emission contour map of PG-CDs-AgNPs. (a) XRD patterns of PG-CDs-AgNPs; XPS analysis of PG-CDs-AgNPs: (b) XPS survey profile; deconvoluted XPS spectra of (c) Ag 3d and (d) C 1s

Ar⁺ implantation-induced tailoring of RF-sputtered ZnO films: structural, morphological, and optical properties

• Manu Bura,
• Divya Gupta,
• Arun Kumar and
• Sanjeev Aggarwal

Beilstein J. Nanotechnol. 2025, 16, 872–886, doi:10.3762/bjnano.16.66

• ]. The diffuse reflectance of the films can be used to calculate the associated Kubelka–Munk function, which is equivalent to the absorption spectra [39][40]. This paves the way to calculate the optical bandgap of the implanted films. The Kubelka–Munk function F(R) is determined employing diffuse

Insights into the electronic and atomic structures of cerium oxide-based ultrathin films and nanostructures using high-brilliance light sources

• Paola Luches and
• Federico Boscherini

Beilstein J. Nanotechnol. 2025, 16, 860–871, doi:10.3762/bjnano.16.65

• pressure. (d) Reference spectra measured for CeO2 and Ce2O3. Reprinted with permission from [58], Copyright 2024 American Chemical Society. This content is not subject to CC BY 4.0. Left: Ce N4,5 XAS absorption spectra measured in transmission mode for the CeO2 film with embedded Ag NPs (solid black line

• supporting oxide was found to decrease with decreasing NP size [53], possibly due to a stronger interaction between Ag and cerium oxide in smaller NPs, resulting from a greater charge transfer per atom [54]. A further possibility offered by synchrotrons is to measure spatially resolved Ce M-edge absorption

• spectra in photoemission electron microscopy (PEEM) mode, in which the photon energy is scanned across the XAS edge and the intensity of the secondary electrons is detected using a PEEM. This allowed to image the shape and size of ceria nanoislands on Ru(0001) and to probe and compare the oxidation state

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

N₂⁺-implantation-induced tailoring of structural, morphological, optical, and electrical characteristics of sputtered molybdenum thin films

• Usha Rani,
• Kafi Devi,
• Divya Gupta and
• Sanjeev Aggarwal

Beilstein J. Nanotechnol. 2025, 16, 495–509, doi:10.3762/bjnano.16.38

• curves derived from the fit process validate the results and offer a theoretical framework for understanding the optical properties of molybdenum thin films. Absorbance spectra The absorption spectra of Mo thin films in Figure 7 show the effects of nitrogen ion implantation and film thickness on the

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

• by laser irradiation is low. We also investigated the effect of other additives other than IPA as radical scavengers. Figure 4 shows the change in absorbance at a wavelength of 520 nm in UV–vis absorption spectra of an Au solution with IPA, ethanol, and glycerin during laser irradiation. In all cases

• changed from 5.0 × 10−4 to 1.0 × 10−2 mol/dm3, and laser was irradiated for 30 min. Figure 5 shows the absorption spectra of Au ion solutions with different concentrations a) without and b) with glycerin after laser irradiation. In this case, given that the absorbance of the solutions at concentrations of

Quantification of lead through rod-shaped silver-doped zinc oxide nanoparticles using an electrochemical approach

• Ravinder Lamba,
• Gaurav Bhanjana,
• Neeraj Dilbaghi,
• Vivek Gupta and
• Sandeep Kumar

Beilstein J. Nanotechnol. 2025, 16, 422–434, doi:10.3762/bjnano.16.33

• ZnO frequently causes a reduction in the bandgap, leading to a shift toward longer wavelengths in the absorption spectra. The smaller bandgaps of the samples in optoelectronic devices provide a significant advantage [21]. Zeta potential of Ag@ZnO nanorods Surface properties of the synthesized Ag@ZnO

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

• specificity of the PEG–PCL nanoparticle system towards SDS detection, further experiments were performed to observe color changes and the absorption spectra of NPs in the presence and absence of SDS and other metals and surfactants. This investigation is essential because heavy metal ions often coexist with

Fabrication and evaluation of BerNPs regarding the growth and development of Streptococcus mutans

• Tuyen Huu Nguyen,
• Hong Thanh Pham,
• Kieu Kim Thanh Nguyen,
• Loan Hong Ngo,
• Anh Ngoc Tuan Mai,
• Thu Hoang Anh Lam,
• Ngan Thi Kim Phan,
• Dung Tien Pham,
• Duong Thuy Hoang,
• Thuc Dong Nguyen and
• Lien Thi Xuan Truong

Beilstein J. Nanotechnol. 2025, 16, 308–315, doi:10.3762/bjnano.16.23

• analysis of BerNPs samples revealed four characteristic absorption peaks of berberine at 230, 266, 350, and 430 nm (Figure 2A). These peaks are consistent with previous studies on the characteristic absorption spectra of berberine [26][27]. According to the standard curve (Figure 2B), the pure berberine

Radiosensitizing properties of dual-functionalized carbon nanostructures loaded with temozolomide

• Radmila Milenkovska,
• Nikola Geskovski,
• Dushko Shalabalija,
• Ljubica Mihailova,
• Petre Makreski,
• Dushko Lukarski,
• Igor Stojkovski,
• Maja Simonoska Crcarevska and
• Kristina Mladenovska

Beilstein J. Nanotechnol. 2025, 16, 229–251, doi:10.3762/bjnano.16.18

Recent advances in photothermal nanomaterials for ophthalmic applications

• Jiayuan Zhuang,
• Linhui Jia,
• Chenghao Li,
• Rui Yang,
• Jiapeng Wang,
• Wen-an Wang,
• Heng Zhou and
• Xiangxia Luo

Beilstein J. Nanotechnol. 2025, 16, 195–215, doi:10.3762/bjnano.16.16

• via non-radiative relaxation, resulting in localized lattice heating [76][77]. Therefore, semiconductors with narrow bandgaps typically show broad absorption spectra and high efficiency in photon trapping. In contrast, wide-bandgap semiconductors have a more limited range of light absorption and less

Clays enhanced with niobium: potential in wastewater treatment and reuse as pigment with antibacterial activity

• Silvia Jaerger,
• Patricia Appelt,
• Mario Antônio Alves da Cunha,
• Fabián Ccahuana Ayma,
• Ricardo Schneider,
• Carla Bittencourt and
• Fauze Jacó Anaissi

Beilstein J. Nanotechnol. 2025, 16, 141–154, doi:10.3762/bjnano.16.13

• ), BEPh(b) and BEOx (c). The absorption spectra in the visible region for the samples of bentonite and their modifications with niobium oxide (a) and niobium phosphate(b). Adsorption and photocatalysis efficiency (a) and UV–vis spectra following the digital images of the MB solutions after adsorption and

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

• + cations. These findings offer information about the structure and chemical interactions within the ZnO NPs (Figure 2b). UV–vis absorption The UV–Vis absorption spectra of ZnO NPs, presented in Figure 2c, establish a distinct absorption peak at 3.16 eV, revealing the characteristic bandgap energy for ZnO

Facile synthesis of size-tunable L-carnosine-capped silver nanoparticles and their role in metal ion sensing and catalytic degradation of p-nitrophenol

• Akash Kumar,
• Ridhima Chadha,
• Abhishek Das,
• Nandita Maiti and
• Rayavarapu Raja Gopal

Beilstein J. Nanotechnol. 2024, 15, 1576–1592, doi:10.3762/bjnano.15.124

•  3a and Supporting Information File 1, Figure S1). The sequential increase in nanoparticle size confirms nanoparticle aggregation or formation of bigger particles and is consistent with the absorption spectra in Figure 2. The polydispersity index (PDI) is a dimensionless value that measures the width

• shows the absorption spectra of ʟ-car-AgNP1 mixed with various metal ions. The concentration of ʟ-car-AgNP1 was fixed in terms of optical density at 1 ± 0.2. Figure 5a shows the optical absorbance spectra of ʟ-car-AgNP1 after adding Cd2+ and Pb2+ and all other metals at a concentration of 0.5 ppm

• significant color change (yellow to brownish-yellow) in the presence of Cd2+ and Pb2+ (Figure 5c). The color and absorption spectra change can be attributed to the nanoparticles’ aggregation [31]. A slight increase in the intensity of ʟ-car-AgNPs after the addition of Cr3+ ions was also observed, possibly due

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

• various excitation wavelengths in the range from 300 to 400 nm. SEM image of Si/CDs/Au-based Schottky diode. (a) UV–vis absorption spectra and (b) bandgap of the CDs layer. I–V characteristics of the Si/CDs/Au-based Schottky diode. Acknowledgements We thank Assoc. Prof. Dr. Kübra Çınar Demir and Lecturer