Nanoarchitectonics with cetrimonium bromide on metal nanoparticles for linker-free detection of toxic metal ions and catalytic degradation of 4-nitrophenol

• Akash Kumar and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 1312–1332, doi:10.3762/bjnano.15.106

• CTAB-AuNR2, centrifuged and as-prepared, respectively. The catalytic conversion of 4-NP to 4-AP was measured using a UV–vis spectrophotometer at 300–900 nm. The disappearance of the color upon adding nanoparticles was measured and further, the change in the plasmon band was recorded. As controls, we

• , surface capping, and linker molecules are required to degrade 4-nitrophenol. Therefore, this study analyzed the impact of size, shape, metal type, and nanoparticle concentration on converting 4-nitrophenol to 4-aminophenol. Characterization of CTAB-capped nanoparticles UV–vis, DLS, Zeta, FTIR, XRD, and

Mn-doped ZnO nanopowders prepared by sol–gel and microwave-assisted sol–gel methods and their photocatalytic properties

• Cristina Maria Vlăduț,
• Crina Anastasescu,
• Silviu Preda,
• Oana Catalina Mocioiu,
• Simona Petrescu,
• Jeanina Pandele-Cusu,
• Dana Culita,
• Veronica Bratan,
• Ioan Balint and
• Maria Zaharescu

Beilstein J. Nanotechnol. 2024, 15, 1283–1296, doi:10.3762/bjnano.15.104

• parallel in Figure 7. The insets show a wide pore size distribution reaching 120 nm and pore width maxima located in the mesoporosity area for both samples (40 nm for SG and 35–45 nm for MW). Similar textural features for SG and MW samples are presented in Table 3. UV–vis spectroscopy The recorded UV–vis

• ]. The direct transitions represented in the inset allow one to evaluate the forbidden band energies, Eg(SG) = 2.95 eV and Eg(MW) = 3.05 eV, indicating a slighty higher photoreactivity of the SG sample. Supporting Information File 1, Figure S2 presents comparative UV–vis spectra for the undoped SG ZnO

• photocatalytic properties of SG and MW. Based on these preliminary results, it is fully desirable to develop such engineered materials [57] for the removal of organic pollutants. It is important to expand the activity range of the materials from UV to visible light by tailoring the manganese addition to ZnO and

Enhanced catalytic reduction through in situ synthesized gold nanoparticles embedded in glucosamine/alginate nanocomposites

• Chi-Hien Dang,
• Le-Kim-Thuy Nguyen,
• Minh-Trong Tran,
• Van-Dung Le,
• Nguyen Minh Ty,
• T. Ngoc Han Pham,
• Hieu Vu-Quang,
• Tran Thi Kim Chi,
• Tran Thi Huong Giang,
• Nguyen Thi Thanh Tu and
• Thanh-Danh Nguyen

Beilstein J. Nanotechnol. 2024, 15, 1227–1237, doi:10.3762/bjnano.15.99

• synthesizing gold nanoparticles (AuNPs) within a glucosamine/alginate (GluN/Alg) nanocomposite via an ionotropic gelation mechanism in aqueous environment. The resulting nanocomposite, AuNPs@GluN/Alg, underwent thorough characterization using UV–vis, EDX, FTIR, SEM, TEM, SAED, and XRD analyses. The spherical

• g·mL−1). The reduction process was initiated through heating the mixture and visually confirmed by a change in color of the reaction mixture indicating the formation of AuNPs on the GluN/Alg composite. UV–vis spectroscopy within the range of 300 to 600 nm was employed to monitor this process

• tracked over time using a UV–vis spectrophotometer, covering the wavelength range of 200–600 nm at room temperature without delay. We examined the kinetics of catalytic degradation by monitoring changes in absorbance values at specific wavelengths. Given the small quantity of nanocatalyst and the

Synthesis, characterization and anticancer effect of doxorubicin-loaded dual stimuli-responsive smart nanopolymers

• Ömür Acet,
• Pavel Kirsanov,
• Burcu Önal Acet,
• Inessa Halets-Bui,
• Dzmitry Shcharbin,
• Şeyda Ceylan Cömert and
• Mehmet Odabaşı

Beilstein J. Nanotechnol. 2024, 15, 1189–1196, doi:10.3762/bjnano.15.96

• explained in detail in section “DOX loading to SNPs “. Then, the solutions with DOX-loaded SNPs were analyzed by UV–vis spectrophotometry at 495 nm wavelength with pure PBS serving as a control to calculate the amount of unencapsulated DOX. PBS buffer was used to remove both unencapsulated and unreacted DOX

Quantum-to-classical modeling of monolayer Ge₂Se₂ and its application in photovoltaic devices

• Anup Shrivastava,
• Shivani Saini,
• Dolly Kumari,
• Sanjai Singh and
• Jost Adam

Beilstein J. Nanotechnol. 2024, 15, 1153–1169, doi:10.3762/bjnano.15.94

• point. The maximum absorption coefficient is 5 × 105 cm−1 along the XX direction. The highest peak for the ZZ direction is calculated as 5.8 × 105 cm−1, corresponding to the UV region. We attribute this maximum to the transition from VBM to CBM, while the other peaks designate a transition from VBM to

Photocatalytic methane oxidation over a TiO₂/SiNWs p–n junction catalyst at room temperature

• Qui Thanh Hoai Ta,
• Luan Minh Nguyen,
• Ngoc Hoi Nguyen,
• Phan Khanh Thinh Nguyen and
• Dai Hai Nguyen

Beilstein J. Nanotechnol. 2024, 15, 1132–1141, doi:10.3762/bjnano.15.92

• absorption than planar Si wafers because of the specific morphology [45]. The optical absorption of the as-prepared catalyst is shown in Figure 3a. The UV–vis diffuse reflection spectrum of TiO2/SiNWs catalyst is drastically reduced in comparison to the pure SiNWs. The superior antireflection property of the

• crucial in photogenerated charge separation and adsorption enhancement under UV–vis light. In other words, the ethane productivity of TiO2/Si NWs was five times higher (210 µmol/cm2) than that of pure p-Si NWs (20 µmol/cm2) and glass/TiO2 (30 µmol/cm2). Photocatalytic OCM over TiO2/Si NWs catalysts was

• recorded in a batch reactor under different wavelengths of light. As shown in Figure 6b, no products were detected under the visible-light irradiation. The photocatalytic performance under UV illumination was significantly lower than that under full illumination. Figure 7 shows the recyclability of the p–n

Unveiling the potential of alginate-based nanomaterials in sensing technology and smart delivery applications

• Shakhzodjon Uzokboev,
• Khojimukhammad Akhmadbekov,
• Ra’no Nuritdinova,
• Salah M. Tawfik and
• Yong-Ill Lee

Beilstein J. Nanotechnol. 2024, 15, 1077–1104, doi:10.3762/bjnano.15.88

• sensor. Another fluorescence-based smart sensor from alginate nanofilms was prepared [122]. Scientists proved that relative humidity could be detected using a guar gum–sodium alginate (GGSA) nanocomposite film. The study found that the fluorescence of biocomposite films under UV light varies at various

Effect of wavelength and liquid on formation of Ag, Au, Ag/Au nanoparticles via picosecond laser ablation and SERS-based detection of DMMP

• Sree Satya Bharati Moram,
• Chandu Byram and
• Venugopal Rao Soma

Beilstein J. Nanotechnol. 2024, 15, 1054–1069, doi:10.3762/bjnano.15.86

• was meticulously evaluated by analyzing the ablation rates, surface plasmon resonance peak positions, and particle size distributions of the obtained colloids. The nanoparticles (NPs) were characterized using the techniques of UV–visible absorption, transmission electron microscopy, and energy

• . This process took approximately 20 minutes. Characterization techniques The absorption studies were conducted by placing 3 mL of the colloidal solution in a 1 cm quartz cuvette and using a UV–visible absorption spectrometer (PerkinElmer, LAMBDA 750) within the 300–800 nm wavelength range. The

• detection of DMMP (1.2 ppm V) in the vapor phase using Glass_Ag_Au NPs, 3D fractal microstructure substrates developed by corner lithography and anisotropic wet etching of silicon using the 785 nm as the Raman excitation. When UV excitation was utilized during the measurements, the Raman peak intensities

Bolometric IR photoresponse based on a 3D micro-nano integrated CNT architecture

• Yasameen Al-Mafrachi,
• Sandeep Yadav,
• Sascha Preu,
• Jörg J. Schneider and
• Oktay Yilmazoglu

Beilstein J. Nanotechnol. 2024, 15, 1030–1040, doi:10.3762/bjnano.15.84

• numerous advantages at room temperature operation. New thermally isolated micro-nano architectures equipped with integrated temperature sensors should outperform their predecessors regarding various critical aspects, such as ultra-broadband detection from ultraviolet (UV) to terahertz radiation [1

• VACNTs (water-assisted CVD on silicon substrates with ethylene as the carbon source) has been investigated by [3]. They showed that vertically aligned SWCNTs can absorb light almost perfectly with a reflectance of 0.01–0.02 over a very wide spectral range (0.2–200 μm). The UV-to-mid-IR absorption

Beyond biomimicry – next generation applications of bioinspired adhesives from microfluidics to composites

• Dan Sameoto

Beilstein J. Nanotechnol. 2024, 15, 965–976, doi:10.3762/bjnano.15.79

• ) and (B) used silicone rubbers as the structural material for adhesives, and were capable of isotropic (A) or directional (B) adhesive performance depending on the symmetry of the cap. A more durable and useful system used deep-UV exposure of acrylic to form master molds, followed by a negative mold in

A review on the structural characterization of nanomaterials for nano-QSAR models

• Salvador Moncho,
• Eva Serrano-Candelas,
• Jesús Vicente de Julián-Ortiz and
• Rafael Gozalbes

Beilstein J. Nanotechnol. 2024, 15, 854–866, doi:10.3762/bjnano.15.71

• reflectance UV–vis spectra). Alternative formulations for valence and conduction band energies, based only on pre-known physicochemical constants and values from reference handbooks, have been reported as well [79][80]. Furthermore, the electric characteristics of the nanoparticle surface can be reported by

Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation

• Maryam Al Qaydi,
• Nitul S. Rajput,
• Michael Lejeune,
• Abdellatif Bouchalkha,
• Mimoun El Marssi,
• Steevy Cordette,
• Chaouki Kasmi and
• Mustapha Jouiad

Beilstein J. Nanotechnol. 2024, 15, 817–829, doi:10.3762/bjnano.15.68

• properties and photodegradation experiments were conducted on a UV–vis–near IR spectrometer (JASCO V-670) and using solar simulator excitation for the PD monitoring using 10 mL of MB dye solution with a concentration of 5 mg/L (10−5 M) and 1 mg of exfoliated photocatalyst. The intensity of the optical

• intensity of the 631 nm peak and the MB concentration. For all experiments, a first run was conducted in the dark for 30 min, followed by PD tests, and maintained for 180 min while monitored by a UV–vis spectrometer every 30 min. Raman spectroscopy for a) MoS2, b) WS2, and c) MoS2/WS2 composite. XRD

Electron-induced ligand loss from iron tetracarbonyl methyl acrylate

• Hlib Lyshchuk,
• Atul Chaudhary,
• Thomas F. M. Luxford,
• Miloš Ranković,
• Jaroslav Kočišek,
• Juraj Fedor,
• Lisa McElwee-White and
• Pamir Nag

Beilstein J. Nanotechnol. 2024, 15, 797–807, doi:10.3762/bjnano.15.66

• iron pentacarbonyl, the π* resonance system is centered around 1.4 eV [11]). There are additional DEA bands at energies of 3.5, 5.5, and 8.5 eV visible in the other DEA fragments. We ascribe these to core-excited resonances where the electron is temporarily trapped by the excited molecule. The UV–vis

• fragments from the reaction Fe(CO)4(η2-C4H6O2) + e−. Supporting Information Supporting Information contains details of the DFT calculation, ion yield curves for dissociative ionization, and FTIR, NMR and UV–vis spectra of the sample. Supporting Information File 16: Additional experimental data. Funding

Electrospun polysuccinimide scaffolds containing different salts as potential wound dressing material

• Veronika Pálos,
• Krisztina S. Nagy,
• Rita Pázmány,
• Krisztina Juriga-Tóth,
• Bálint Budavári,
• Judit Domokos,
• Dóra Szabó,
• Ákos Zsembery and
• Angela Jedlovszky-Hajdu

Beilstein J. Nanotechnol. 2024, 15, 781–796, doi:10.3762/bjnano.15.65

• research group [34]. The tests were performed first on tumor cells to optimize the experimental conditions and then on fibroblasts to investigate if the scaffolds have a cytotoxic effect. The discs with diameters of 16 mm (m = 0.5 ± 0.1 mg) were sterilized under UV light for 1 h. After that, they were

Exploring surface charge dynamics: implications for AFM height measurements in 2D materials

• Mario Navarro-Rodriguez,
• Andres M. Somoza and
• Elisa Palacios-Lidon

Beilstein J. Nanotechnol. 2024, 15, 767–780, doi:10.3762/bjnano.15.64

• ethanol and MQ water. Subsequently, the substrate was exposed to UV/ozone for 15 min to eliminate organic contaminants and promote the hydrophilicity of the SiO2 surface. GO (Graphenea), was employed without further treatment, while rGO was obtained through chemical reduction using hydrazine hydrate (50

Green synthesis of biomass-derived carbon quantum dots for photocatalytic degradation of methylene blue

• Dalia Chávez-García,
• Mario Guzman,
• Viridiana Sanchez and
• Rubén D. Cadena-Nava

Beilstein J. Nanotechnol. 2024, 15, 755–766, doi:10.3762/bjnano.15.63

• 24 h, CQDs were successfully synthesized. A comprehensive characterization of the CQDs was performed using UV–visible spectroscopy, Fourier-transform infrared spectroscopy, dynamic light scattering, Raman spectroscopy, and luminescence spectroscopy, confirming their high quality. The photocatalytic

• catalytic activity in MB degradation, while those prepared with water as a solvent did not show significant catalytic activity. The samples were also characterized using UV–visible spectra, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, dynamic light scattering (DLS), and

• optoelectronic characteristics of the synthesized CQDs, UV–vis absorption spectra were measured using a Thermo Scientific Evolution 220 spectrophotometer. The CQDs were dissolved in deionized water at a ratio of 1:10 (0.3 mg of CQDs per mL) and the measurements were taken in the range of 200–800 nm. A 1 cm path

Simultaneous electrochemical determination of uric acid and hypoxanthine at a TiO₂/graphene quantum dot-modified electrode

• Vu Ngoc Hoang,
• Dang Thi Ngoc Hoa,
• Nguyen Quang Man,
• Le Vu Truong Son,
• Le Van Thanh Son,
• Vo Thang Nguyen,
• Le Thi Hong Phong,
• Ly Hoang Diem,
• Kieu Chan Ly,
• Ho Sy Thang and
• Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 719–732, doi:10.3762/bjnano.15.60

• microscope (SEM), Hitachi (Japan). UV–vis absorption spectroscopy measurements was carried out on an 8453 UV–vis spectrophotometer, Agilent, USA. Photoluminescence (PL) spectroscopy measurements were performed on a FL3C-22 spectrophotometer, Horiba, USA. Synthesis of TiO2/GQDs Peroxo titanium complexes were

• µL of 500 µM URI and 20 µL of 500 µM HYT before dilution to 10 mL. Results and Discussion Characterization of materials The mixtures of GQDs and TiO2/GQDs suspensions were exposed to visible and UV light to confirm their fluorescence behavior. Under visible light, the aqueous suspension of GQDs is

• transparent and brown in color, while the suspension of the peroxo titanium complex is opaque yellow. The prepared TiO2/GQD aqueous suspensions, in contrast, display a light yellow color, which gets darker as the ratio of TiO2/GQD in the complex increases (Figure 1a). Under 365 nm UV irradiation (Figure 1b

Elastic modulus of β-Ga₂O₃ nanowires measured by resonance and three-point bending techniques

• Annamarija Trausa,
• Sven Oras,
• Sergei Vlassov,
• Mikk Antsov,
• Tauno Tiirats,
• Andreas Kyritsakis,
• Boris Polyakov and
• Edgars Butanovs

Beilstein J. Nanotechnol. 2024, 15, 704–712, doi:10.3762/bjnano.15.58

• , University of Tartu, Nooruse 1, 50411 Tartu, Estonia Estonian Military Academy, Riia 12, 51010 Tartu, Estonia 10.3762/bjnano.15.58 Abstract Due to the recent interest in ultrawide bandgap β-Ga2O3 thin films and nanostructures for various electronics and UV device applications, it is important to understand

• chemical stability [4][5]. Ga2O3 is a promising candidate for visible-blind UV-light sensors [3], power devices and optoelectronics [6][7][8][9], gas sensors [10], and memory devices [8]. These applications can be scaled down to the nanoscale, including flexible nanodevices. Ga2O3 nanowires (NWs) could be

Functional fibrillar interfaces: Biological hair as inspiration across scales

• Guillermo J. Amador,
• Brett Klaassen van Oorschot,
• Caiying Liao,
• Jianing Wu and
• Da Wei

Beilstein J. Nanotechnol. 2024, 15, 664–677, doi:10.3762/bjnano.15.55

• square centimeter) [32]. Hairs on humans have also been reported to protect the skin from UVA and UVB radiation from the sun [33]. UV radiation from the sun can not only heat up human skin but is also linked to skin cancers. Therefore, in mammals and birds, hairs provide protection from thermal effects

Laser synthesis of nanoparticles in organic solvents – products, reactions, and perspectives

• Theo Fromme,
• Sven Reichenberger,
• Katharine M. Tibbetts and
• Stephan Barcikowski

Beilstein J. Nanotechnol. 2024, 15, 638–663, doi:10.3762/bjnano.15.54

Photocatalytic degradation of methylene blue under visible light by cobalt ferrite nanoparticles/graphene quantum dots

• Vo Chau Ngoc Anh,
• Le Thi Thanh Nhi,
• Le Thi Kim Dung,
• Dang Thi Ngoc Hoa,
• Nguyen Truong Son,
• Nguyen Thi Thao Uyen,
• Nguyen Ngoc Uyen Thu,
• Le Van Thanh Son,
• Le Trung Hieu,
• Tran Ngoc Tuyen and
• Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 475–489, doi:10.3762/bjnano.15.43

• time intervals, 10 mL of the sample was taken and centrifuged to separate the material from the solution. The concentration of remaining MB in the solution was determined by using UV–vis spectroscopy. Identification of intermediates Intermediate products and mineralization level of the MB

• white light, and it has a yellow-brown colour, characteristic of GQDs prepared from the natural polymer starch [16]. The solution on the right was exposed to 254 nm UV light, and the colour changed to green. The typical absorption peak at 287 nm in the UV–vis spectrum of the aqueous GQD solution (Figure

• nanoparticles exhibit a significantly lower PL emission intensity than CF alone because of the higher separation efficiency of charge carriers of the CF/GQDs sample. The UV–vis DRS spectra of CF and CF/GQDs (Figure 6b) show that the absorption intensity becomes stronger after grafting the GQDs on CF, indicating

Fabrication of nanocrystal forms of ᴅ-cycloserine and their application for transdermal and enteric drug delivery systems

• Hsuan-Ang Tsai,
• Tsai-Miao Shih,
• Theodore Tsai,
• Jhe-Wei Hu,
• Yi-An Lai,
• Jui-Fu Hsiao and
• Guochuan Emil Tsai

Beilstein J. Nanotechnol. 2024, 15, 465–474, doi:10.3762/bjnano.15.42

• other hand, only a few research articles reported DCS formulations for parenteral administration [18][19]. Nanocarriers offer great advantages to many technological fields. For example, polytetrafluoroethylene (PTFE) with silicon carbide nanocrystals can be applied as a photostabilizer or as a UV light

Potential of a deep eutectic solvent in silver nanoparticle fabrication for antibiotic residue detection

• Le Hong Tho,
• Bui Xuan Khuyen,
• Ngoc Xuan Dat Mai and
• Nhu Hoa Thi Tran

Beilstein J. Nanotechnol. 2024, 15, 426–434, doi:10.3762/bjnano.15.38

• used as reducing agent. The synthesis protocol is summarily presented in Figure 1. Also, to characterize our material, UV–vis and XRD measurements were carried out. Figure 2A shows the broad adsorption band indicating the high number of excitons [38] on the surface of Ag NPs due to SPR. The SPR peak is

• located at 390 nm, which is suitable for SERS applications with 532 nm laser excitation. Besides, the shape of the UV–vis spectrum is in accordance with Mie scattering theory calculations, as reported in [39], proving the existence of Ag NPs in the solution. Moreover, the XRD pattern of the thin film

• characterization and apparatus The absorbance properties of the sample were recorded using a V-730 UV–vis–NIR spectrophotometer supplied by JASCO, Japan. The crystallinity of the Ag NPs-DES thin film was determined using a D8 Advance diffractometer, Bruker, UK, with a Ni-filtered Cu Kα X-ray source. To evaluate

Controllable physicochemical properties of WO_x thin films grown under glancing angle

• Rupam Mandal,
• Aparajita Mandal,
• Alapan Dutta,
• Rengasamy Sivakumar,
• Sanjeev Kumar Srivastava and
• Tapobrata Som

Beilstein J. Nanotechnol. 2024, 15, 350–359, doi:10.3762/bjnano.15.31

• fascinating optical and electrical properties [1]. WOx is a wide-bandgap oxide semiconductor with a large excitonic binding energy of 0.15 eV and a high optical absorption coefficient (≥104 cm−1 in the UV region) [2]. These, in conjunction with decent carrier mobility (12 cm2·V−1·s−1), make this material an

• ideal candidate for UV photodetector applications [3]. Because of its octahedral lattice symmetry and partially filled d bands, WOx is also highly attractive as an electrochromic material for developing modern-day smart windows and display devices [4][5][6][7]. Exhibiting various stoichiometric and sub

• electrons under the InLens configuration. The optical characteristics of the films were examined using a UV–Vis–NIR spectrophotometer (Shimadzu-3101PC) equipped with an unpolarised light source (300–1200 nm wavelength range). Results and Discussion Figure 1a–d depicts AFM topographic images of as-deposited

Vinorelbine-loaded multifunctional magnetic nanoparticles as anticancer drug delivery systems: synthesis, characterization, and in vitro release study

• Zeynep Özcan and
• Afife Binnaz Hazar Yoruç

Beilstein J. Nanotechnol. 2024, 15, 256–269, doi:10.3762/bjnano.15.24

• was separated with the assistance of a magnet, followed by three thorough rinses with distilled water. All wash supernatants were collected to measure the VNB loading content based on UV–vis spectrophotometry. The resulting nanostructure underwent vacuum drying at 45 °C. The loading entrapment

• , 80, 100, 200, and 400 µg/mL. These solutions were then placed in quartz cuvettes, and absorbance readings were taken using the UV–vis spectrophotometer at a wavelength of 268 nm [40]. The absorbance values obtained were utilized to construct the calibration curve. Determination of photothermal

• conducted at 37 °C with a shaking speed of 150 rpm. The experiment involved obtaining a 1 mL sample at specified time intervals (0.5, 1, 2, 3, 4, 5, 6, 12, 24, 30, 36, 48, and 50 h). The sample was then analyzed using a UV–vis spectrophotometer. The mean values of the results obtained in triplicate were