Mixed oxides with corundum-type structure obtained from recycling can seals as paint pigments: color stability

• Dienifer F. L. Horsth,
• Julia de O. Primo,
• Nayara Balaba,
• Fauze J. Anaissi and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2023, 14, 467–477, doi:10.3762/bjnano.14.37

• sample 2. The spectra confirm the oxidation state 3+ in all samples (Al3+, Cr3+, and Fe3+). UV–vis absorption spectra of (a) sample 1 and (b) sample 2, both confirming the oxidation state 3+ of the coloring ions. Distribution of samples according to the hue value (h*): alumina (87.20), sample 1 (80.65

• Information File 4: Additional experimental data. XRD and SEM of the samples, absorption spectra, reflectance spectra, and colorimetric parameters of the oxides and samples. Funding D. F. L. H, J. d. O. P., and N. B. appreciate the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES

Conjugated photothermal materials and structure design for solar steam generation

• Chia-Yang Lin and
• Tsuyoshi Michinobu

Beilstein J. Nanotechnol. 2023, 14, 454–466, doi:10.3762/bjnano.14.36

• tunability of molecular structures [5][6]. In fact, there is a long development history of conjugated molecules and polymers, and a clear correlation between their chemical structure and physical properties has been established [7][8][9][10][11][12][13][14][15][16][17]. For example, the absorption spectra

• but not EW end groups. In contrast, DPP-DCV and DPP-INCN have -DCV and -INCN-based EW end groups, respectively. The absorption spectra of the DPP derivatives bathochromically shifted due to the ICT band, and its extinction coefficient increased in the order from DPP-H to DPP-DCV and further to DPP

• International License, https://creativecommons.org/licenses/by-nc/4.0). This content is not subject to CC BY 4.0. Part (a) of the source was redrawn from [24] and part (b) was inspired by [25]. (a) Chemical structures of DPP-H, DPP-DCV, and DPP-INCN and optical absorption spectra of the DPP derivatives (b) in

Evaluation of electrosynthesized reduced graphene oxide–Ni/Fe/Co-based (oxy)hydroxide catalysts towards the oxygen evolution reaction

• Karolina Cysewska,
• Marcin Łapiński,
• Marcin Zając,
• Jakub Karczewski,
• Piotr Jasiński and
• Sebastian Molin

Beilstein J. Nanotechnol. 2023, 14, 420–433, doi:10.3762/bjnano.14.34

• Figure 3a–d shows the X-ray absorption spectra (XAS) of the L3 edge of nickel (a), iron (b), cobalt (c), and carbon (d) in the studied catalysts. The appearance of a shoulder peak at the L3 edge of the nickel (Figure 3a) at 855 eV indicates the presence of oxides in the structure of the catalysts (Ni in

Plasmonic nanotechnology for photothermal applications – an evaluation

• A. R. Indhu,
• L. Keerthana and
• Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

Quercetin- and caffeic acid-functionalized chitosan-capped colloidal silver nanoparticles: one-pot synthesis, characterization, and anticancer and antibacterial activities

• Akif Hakan Kurt,
• Elif Berna Olutas,
• Fatma Avcioglu,
• Hamza Karakuş,
• Mehmet Ali Sungur,
• Cansu Kara Oztabag and
• Muhammet Yıldırım

Beilstein J. Nanotechnol. 2023, 14, 362–376, doi:10.3762/bjnano.14.31

• nanoparticles The absorption spectra of quercetin, caffeic acid, chitosan, Ch-, Ch/Q-, and Ch/CA-Ag NPs were recorded on a UV–vis double-beam spectrophotometer (Hitachi U-2900) at wavelengths of 200 to 800 nm at 1.0 nm intervals with a quartz cell of 1.0 cm light path. Fourier-transform infrared (FTIR) spectra

• the absorption spectra is also reflected in the color of nanoparticle solutions (see Figure 2d). Compared to the reference sample (i.e., Ch-Ag NPs), new absorption shoulders appeared at the higher energy side of the spectra (i.e., at about 200 and 345 nm) in the modified chitosan structure with

• the concentration of phenolics. Figure 5c shows the absorption spectra of pure caffeic acid (inset graph) and caffeic acid–FC–Na2CO3 mixtures. The calibration curve was obtained using absorbance values at 762 nm (Figure 5d). Since the phenolic content will be proportional to the amount of caffeic acid

Non-stoichiometric magnetite as catalyst for the photocatalytic degradation of phenol and 2,6-dibromo-4-methylphenol – a new approach in water treatment

• Joanna Kisała,
• Anna Tomaszewska and
• Przemysław Kolek

Beilstein J. Nanotechnol. 2022, 13, 1531–1540, doi:10.3762/bjnano.13.126

• previous publication of ours [19]. The absorption spectra of the catalysts showed noticeable differences (Figure 1b). Using the absorption spectra, the electron gap energies for M1 and M2 were determined to be 0.11 V and 1.75 V, respectively (Table 1) [20]. Phase identification of the magnetite structure

• multimeter (CPC 411, Elmetron, Poland). External standards of seven concentration levels ranging from 1 × 10−5 to 1 × 10−3 mol·L−1 were used to quantify bromide ions. X-ray diffraction measurements of M1 (red), M2 (blue) (a), and UV–vis absorption spectra of M1 (red) and M2 (blue) (b). Figure 1a and 1b were

In search of cytotoxic selectivity on cancer cells with biogenically synthesized Ag/AgCl nanoparticles

• Mitzi J. Ramírez-Hernández,
• Mario Valera-Zaragoza,
• Omar Viñas-Bravo,
• Ariana A. Huerta-Heredia,
• Miguel A. Peña-Rico,
• Erick A. Juarez-Arellano,
• David Paniagua-Vega,
• Eduardo Ramírez-Vargas and
• Saúl Sánchez-Valdes

Beilstein J. Nanotechnol. 2022, 13, 1505–1519, doi:10.3762/bjnano.13.124

• give rise to a collective oscillation known as surface plasmon effect [34]. This effect can be monitored by UV–vis spectroscopy, where metal nanoparticles absorb radiation at different wavelengths depending on their size [36]. The UV–vis absorption spectra of the reactions at different temperatures are

Facile preparation of Au- and BODIPY-grafted lipid nanoparticles for synergized photothermal therapy

• Yuran Wang,
• Xudong Li,
• Haijun Chen and
• Yu Gao

Beilstein J. Nanotechnol. 2022, 13, 1432–1444, doi:10.3762/bjnano.13.118

• –visible (UV–vis) absorption spectra were measured with an UV–vis spectrometer (Q-5000, Quawell, America). The amounts of BDP in AB-LNPs were analyzed using UV–vis spectroscopy after the dissolution of AB-LNPs in DMSO by measuring the absorbance at a wavelength of 600 nm. The loading efficiency (LE, %) was

Green synthesis of zinc oxide nanoparticles toward highly efficient photocatalysis and antibacterial application

• Vo Thi Thu Nhu,
• Nguyen Duy Dat,
• Le-Minh Tam and
• Nguyen Hoang Phuong

Beilstein J. Nanotechnol. 2022, 13, 1108–1119, doi:10.3762/bjnano.13.94

• Equation 3. Figure 8 shows the degradation absorption spectra of MO and MB by synthesized ZnO under visible and UV light for different time intervals. The intensity of the peak decreased with increasing irradiation time. The results in Figure 9 show that the degradation efficiency of MB and MO solutions

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

• Aisha Kanwal,
• Naheed Bibi,
• Sajjad Hyder,
• Arif Muhammad,
• Hao Ren,
• Jiangtao Liu and
• Zhongli Lei

Beilstein J. Nanotechnol. 2022, 13, 1068–1107, doi:10.3762/bjnano.13.93

Solar-light-driven LaFe_xNi_1−xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

• Chao-Wei Huang,
• Shu-Yu Hsu,
• Jun-Han Lin,
• Yun Jhou,
• Wei-Yu Chen,
• Kun-Yi Andrew Lin,
• Yu-Tang Lin and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 882–895, doi:10.3762/bjnano.13.79

• microscopy (FESEM). The light absorption spectra of the perovskite oxides were inspected using V-670 (Jasco, Japan) to examine the UV–vis absorption capability with diffuse reflectance spectroscopy (DRS) from 200 to 800 nm. The nitrogen adsorption–desorption analyzer, ASAP 2020 PLUS (ASAP, USA), was applied

Efficient liquid exfoliation of KP₁₅ nanowires aided by Hansen's empirical theory

• Zhaoxuan Huang,
• Zhikang Jiang,
• Nan Tian,
• Disheng Yao,
• Fei Long,
• Yanhan Yang and
• Danmin Liu

Beilstein J. Nanotechnol. 2022, 13, 788–795, doi:10.3762/bjnano.13.69

• concentrations of KP15 dispersions in butyrolactone were prepared by liquid exfoliation with a predetermined concentration. UV−visible absorption spectra results are shown in Figure 2. The concentration linearly varies with absorbance. The slope of this fitted linear equation is 3.86 ± 0.13. This means that the

A nonenzymatic reduced graphene oxide-based nanosensor for parathion

• Sarani Sen,
• Anurag Roy,
• Ambarish Sanyal and
• Parukuttyamma Sujatha Devi

Beilstein J. Nanotechnol. 2022, 13, 730–744, doi:10.3762/bjnano.13.65

• (ULVAC-PHI, U.S.) with monochromatic Al Kα (hν = 1486.6 eV) radiation, and a beam size of 100 μm. The Fourier transform infrared (FTIR) absorption spectra of GO and ERGO were collected in the 4000–400 cm−1 region on a Perkin Elmer spectrometer as KBr (Sigma-Aldrich, Germany) pellets. The crystalline

• : CV of ERGO/GCE at different scan rates (10–300 mV/s) in 1.0 mM K3Fe(CN)6 solution with 1 M KCl. Figure S2: (A) Storage stability of the proposed sensing matrix (ERGO/GCE), (B) SWV of PT (1.5, 2.5, 5 μM) added in groundwater. Figure S3: (A) Absorption spectra of parathion and (B) corresponding

Tunable high-quality-factor absorption in a graphene monolayer based on quasi-bound states in the continuum

• Jun Wu,
• Yasong Sun,
• Feng Wu,
• Biyuan Wu and
• Xiaohu Wu

Beilstein J. Nanotechnol. 2022, 13, 675–681, doi:10.3762/bjnano.13.59

• 0.34 nm. Throughout this work, we assume τ = 0.1 ps. The Fermi level is initially considered to be Ef = 0.3 eV, and its influence on absorption spectra will be analyzed latter. Based on the parameters mentioned above, we calculated the absorption spectra shown in Figure 2. The absorption spectra A(λ

• . Therefore, the geometric tolerance should be precisely controlled inside a certain range during fabrication. We investigate the influence of geometric parameters on the absorption spectra so as to provide a useful guidance for practical fabrication. The results are shown in Figure 6. As shown in Figure 6a

• (Equation 2), a change of the Fermi level should have direct influence on the graphene absorption. In Figure 7, we show the absorption spectra for different Fermi levels. Obviously, the spectral absorptivity exhibits a blueshift with Ef increasing from 0.1 to 0.5 eV. In addition, the corresponding resonant

Antibacterial activity of a berberine nanoformulation

• Hue Thi Nguyen,
• Tuyet Nhung Pham,
• Anh-Tuan Le,
• Nguyen Thanh Thuy,
• Tran Quang Huy and
• Thuy Thi Thu Nguyen

Beilstein J. Nanotechnol. 2022, 13, 641–652, doi:10.3762/bjnano.13.56

• of glycerol on the physicochemical properties of BBR NPs was investigated by UV–vis absorption and FTIR spectroscopy. The UV–vis absorption spectra of pure BBR and BBR NP solutions in distilled water at the same concentration are shown in Figure 1. Glycerol has no absorption band in the UV–vis

• properties of BBR NPs UV–vis absorption spectra of the aqueous solutions of pure BBR and BBR NPs having the same concentration were measured in the wavelength range of 200–550 nm using a UV–vis spectrophotometer (6850 UV/Vis, Jenway). The chemical bonding characteristics of pure BBR powder and BBR NPs

• the preparation of berberine (BBR) in nanoformulation to enhance its solubility and increase its antibacterial effectiveness against hospital-acquired infections. BBR nanoparticles (BBR NPs) were formed by antisolvent precipitation (ASP) using glycerol as a safe organic solvent. UV–vis absorption

Sodium doping in brookite TiO₂ enhances its photocatalytic activity

• Boxiang Zhuang,
• Honglong Shi,
• Honglei Zhang and
• Zeqian Zhang

Beilstein J. Nanotechnol. 2022, 13, 599–609, doi:10.3762/bjnano.13.52

• activity. Results and Discussion Enhanced photocatalytic activity The photocatalytic activity of the samples calcinated at 300–600 °C for 2 h was measured by the photodegradation of MB under UV light at room temperature. Figure 1a and Figure 1b display the dynamic changes in the absorption spectra of MB

• of the MB (≈665 nm) acquired by a UV–vis spectrophotometer. The diffuse reflectance spectra were measured in the wavelength range of 300–800 nm using a UV–vis spectrophotometer. The bandgap was determined by linear fitting the absorption edge of the Tauc plot of the absorption spectra. Structure

• ] and ePDF tools [37] were used to perform pattern indexing and to extract the atomic pair distribution function (PDF). The UV absorption spectra of MB during photocatalytic reactions over samples calcinated at (a) 400 °C, (b) 500 °C. (c) The photodegradation of MB by samples calcinated at 300–600 °C

Detection and imaging of Hg(II) in vivo using glutathione-functionalized gold nanoparticles

• Gufeng Li,
• Shaoqing Li,
• Rui Wang,
• Min Yang,
• Lizhu Zhang,
• Yanli Zhang,
• Wenrong Yang and
• Hongbin Wang

Beilstein J. Nanotechnol. 2022, 13, 549–559, doi:10.3762/bjnano.13.46

• were of analytical grade. TEM was carried out using a JEM-2100 transmission electron microscope (JEOL, Japan) at an accelerating voltage of 200 kV. UV–vis absorption spectra were obtained using a UV-2100 Spectrophotometer (Shimadzu, Japan). Fluorescence spectra were recorded using an F-7000

Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review

• Ioana Marica,
• Fran Nekvapil,
• Maria Ștefan,
• Cosmin Farcău and
• Alexandra Falamaș

Beilstein J. Nanotechnol. 2022, 13, 472–490, doi:10.3762/bjnano.13.40

Coordination-assembled myricetin nanoarchitectonics for sustainably scavenging free radicals

• Xiaoyan Ma,
• Haoning Gong,
• Kenji Ogino,
• Xuehai Yan and
• Ruirui Xing

Beilstein J. Nanotechnol. 2022, 13, 284–291, doi:10.3762/bjnano.13.23

• dynamic light scattering were used to record absorption spectra and size change. Cytotoxicity experiment in vitro The cytotoxicity of the as-prepared MZG nanoparticles was assessed against 3T3 cells. 3T3 cells were cultivated with Dulbecco's Modified Eagle Medium (DMEM) containing 10% (v/v) fetal bovine

• quantitative stoichiometry analysis. The quantitative component analysis by UV–vis and ICP-OES proved that the molar ratio of Myr/GSH/Zn2+ was close to 1:1:1 (Supporting Information File 1, Table S1 and Figure S1). The UV–vis absorption spectra of pure Myr dispersed in 0.1 M NaOH (pH 13), Myr/Zn2+ complex (pH

• different concentrations of H2O2 (0.01, 0.1, 1, 10, and 100 mM), UV–vis absorption spectra and the size of the MZG nanoparticles were measured. The UV–vis absorbance of MZG nanoparticles from 300 to 400 nm (Figure 3e) decreased with the increase of H2O2 concentration. Also, the size of MZG nanoparticles was

Photothermal ablation of murine melanomas by Fe₃O₄ nanoparticle clusters

• Xue Wang,
• Lili Xuan and
• Ying Pan

Beilstein J. Nanotechnol. 2022, 13, 255–264, doi:10.3762/bjnano.13.20

• show that clustered magnetic Fe3O4 nanoparticles induce a redshift in the light absorption spectra, which enhances light absorbance within the NIR region and improves their utilization as photosensitizers during PTT to ablate lung tumors [16]. However, the role of Fe3O4 nanoparticle clusters in the

Tin dioxide nanomaterial-based photocatalysts for nitrogen oxide oxidation: a review

• Viet Van Pham,
• Hong-Huy Tran,
• Thao Kim Truong and
• Thi Minh Cao

Beilstein J. Nanotechnol. 2022, 13, 96–113, doi:10.3762/bjnano.13.7

• ] investigated the bandgap of SnO2 when changing the self-doping of SnO2. The change of the color of the powder products and the redshift in the absorption spectra are two quantities that are correlated with each other. Normally, SnO2 is white and optical absorptions in the visible region arise from changes of

• photocatalytic oxidation ability of SnO2. Ultraviolet–visible absorption spectra (a) and corresponding bandgaps of SQDs (b). Figure 3 was reprinted from [46], Materials Letters, vol. 221, by Babu, B.; Neelakanta Reddy, I.; Yoo, K.; Kim, D.; Shim, J. “Bandgap tuning and XPS study of SnO2 quantum dots”, pages 211

Sputtering onto liquids: a critical review

• Anastasiya Sergievskaya,
• Adrien Chauvin and
• Stephanos Konstantinidis

Beilstein J. Nanotechnol. 2022, 13, 10–53, doi:10.3762/bjnano.13.2

Enhancement of the piezoelectric coefficient in PVDF-TrFe/CoFe₂O₄ nanocomposites through DC magnetic poling

• Marco Fortunato,
• Alessio Tamburrano,
• Maria Paola Bracciale,
• Maria Laura Santarelli and
• Maria Sabrina Sarto

Beilstein J. Nanotechnol. 2021, 12, 1262–1270, doi:10.3762/bjnano.12.93

• composition analysis was performed through EDX using the FESEM, equipped with a Bruker Quantax EDX setup capable of an energy resolution of 123 eV at Mn Kα. In order to prevent charging the samples were metalized with 20 nm of Cr using a Quorum Technologies Q150T ES sputter coater. All FTIR absorption spectra

First-principles study of the structural, optoelectronic and thermophysical properties of the π-SnSe for thermoelectric applications

• Muhammad Atif Sattar,
• Najwa Al Bouzieh,
• Maamar Benkraouda and
• Noureddine Amrane

Beilstein J. Nanotechnol. 2021, 12, 1101–1114, doi:10.3762/bjnano.12.82

• entire optical region of an alloy and shows the absorption peaks from the occupied to unoccupied states which occur due to electronic transitions. The studied π-SnSe alloy reveals the broader part of the electromagnetic spectrum. It can be noted from the absorption spectra (Figure 11c) that the value of

Modification of a SERS-active Ag surface to promote adsorption of charged analytes: effect of Cu²⁺ ions

• Bahdan V. Ranishenka,
• Andrei Yu. Panarin,
• Irina A. Chelnokova,
• Sergei N. Terekhov,
• Peter Mojzes and
• Vadim V. Shmanai

Beilstein J. Nanotechnol. 2021, 12, 902–912, doi:10.3762/bjnano.12.67

• agreement with electron microscopy and literature [30]. Immobilization of Ag NPs on a glass surface Utilizing glass slides for the preparation of SERS substrates permitted us to use siloxane chemistry to modify the surface and to control the immobilization process via the absorption spectra. Glass also

• , which leads to a high immobilization efficiency. The sodium citrate concentration (2.5 mM) was adjusted to obtain a maximal NP surface filling and, at the same time, to avoid NP aggregation caused by high salt concentration. Figure 2 shows absorption spectra of the polyethylenimine (PEI)-modified glass

• NP water solution (Ag concentration of 32 µg/mL) with 2.5 mM sodium citrate and kept at room temperature. A 2.5 mm quartz cuvette filled with 2.5 mM sodium citrate water solution was used to measure the absorption spectra. The glass substrate covered by Ag NPs was placed into the cuvette after