Synthesis of novel C-doped g-C₃N₄ nanosheets coupled with CdIn₂S₄ for enhanced photocatalytic hydrogen evolution

• Jingshuai Chen,
• Chang-Jie Mao,
• Helin Niu and
• Ji-Ming Song

Beilstein J. Nanotechnol. 2019, 10, 912–921, doi:10.3762/bjnano.10.92

• nanocomposites. It can be clearly observed that the light absorbance decreases in the visible light range upon addition of CdIn2S4 content in CISCCN nanocomposites. The band gap (Eg) of g-C3N4, CCN and CdIn2S4 can be estimated by plotting (αhν)2 as a function of the photon energy (Figure 6b), with α being the

The systemic effect of PEG-nGO-induced oxidative stress in vivo in a rodent model

• Qura Tul Ain,
• Samina Hyder Haq,
• Abeer Alshammari,
• Moudhi Abdullah Al-Mutlaq and
• Muhammad Naeem Anjum

Beilstein J. Nanotechnol. 2019, 10, 901–911, doi:10.3762/bjnano.10.91

• acid (TCA) in a glass tube covered by aluminum foil. Then, 0.5 mL of an enzyme (diluted tissue homogenate) was added to the mixture and kept in a water bath at 100 °C for 30 min. Afterward, the mixture was allowed to cool at room temperature and was centrifuged at 1000g for 10 min. The absorbance was

• mixed with a 0.04% DNTB buffer in a ratio of 1:9. Then, the absorbance was measured at 412 nm using a UV–vis spectrometer. The GSH level was determined using a calibration curve and was expressed in μM/mg. Glutathione S-transferase Glutathione S-transferase (GST) activity was calculated by a method

Tungsten disulfide-based nanocomposites for photothermal therapy

• Tzuriel Levin,
• Hagit Sade,
• Rina Ben-Shabbat Binyamini,
• Maayan Pour,
• Iftach Nachman and
• Jean-Paul Lellouche

Beilstein J. Nanotechnol. 2019, 10, 811–822, doi:10.3762/bjnano.10.81

• attachment of polymers to the composite. Figure 3 shows the FTIR absorbance spectra of WS2-NT and its composites. The absorption of the WS2-NTs was so weak that we are not sure that anything can be learned from such absorption. In the spectrum of WS2-NT-CM (and of its two composites), the strong peak at 570

• , suitable for targeted PTT. Schematic description for WS2-NT-CM nanocomposite preparation. TEM, HRTEM, and SEM images of (a–c) WS2-NT; (d–f) WS2-NT-CM; (g,h) WS2-NT-CM-PEI and (i) WS2-NT-CM-PAA. FTIR absorbance spectra of WS2-NT and its nanocomposite samples. TGA analysis data of WS2-NTs and its

Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

• Jeff L. Nyalosaso,
• Rachod Boonsin,
• Pierre Vialat,
• Damien Boyer,
• Geneviève Chadeyron,
• Rachid Mahiou and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 760–770, doi:10.3762/bjnano.10.75

• information on the internal conversion (QYint) and the absorbance (Abs) of the studied material. QYint is defined as the ratio between photons emitted and photons absorbed by the material upon external excitation. The product of these two parameters gives the absolute quantum yield in percentage (QYab = QYint

An iridescent film of porous anodic aluminum oxide with alternatingly electrodeposited Cu and SiO₂ nanoparticles

• Menglei Chang,
• Huawen Hu,
• Haiyan Quan,
• Hongyang Wei,
• Zhangyi Xiong,
• Jiacong Lu,
• Pin Luo,
• Yaoheng Liang,
• Jianzhen Ou and
• Dongchu Chen

Beilstein J. Nanotechnol. 2019, 10, 735–745, doi:10.3762/bjnano.10.73

• above 10 Hz and below 10 Hz were 470 pF and 2.2 nF, respectively. The parameters related to filter and earthing modes were set as 470 nF and field, respectively. The prepared samples were observed using a TM3030 scanning electron microscope (SEM, Hitachi). The absorbance and emissivity properties were

Features and advantages of flexible silicon nanowires for SERS applications

• Hrvoje Gebavi,
• Vlatko Gašparić,
• Dubravko Risović,
• Nikola Baran,
• Paweł Henryk Albrycht and
• Mile Ivanda

Beilstein J. Nanotechnol. 2019, 10, 725–734, doi:10.3762/bjnano.10.72

• of the substrate. The pH value of 100% ethanol is 7.33, while the water has a pH value equal to 7. Therefore, we do not expect a significant increase in SERS intensity due to the reorientation of 4-MPBA that could be ascribed to a small change of pH value (see the charge transfer and absorbance in

Deposition of metal particles onto semiconductor nanorods using an ionic liquid

• Michael D. Ballentine,
• Elizabeth G. Embry,
• Marco A. Garcia and
• Lawrence J. Hill

Beilstein J. Nanotechnol. 2019, 10, 718–724, doi:10.3762/bjnano.10.71

• expanded upon by Pyun et al. [27][28]. Our CdSe quantum dots had an average diameter of 2.4 nm as determined using the correlation of particle diameter with the wavelength of the low energy absorbance peak (λmax = 509 nm) [29]. The CdSe@CdS nanorods had an average length of 50 ± 10 nm and an average

• conducted to observe the dye degradation rate without catalyst present. The samples were irradiated with visible light and dye degradation was monitored using a UV–vis spectrometer to track the disappearance of the characteristic absorbance peak at 655 nm. Although both catalysts were stored in toluene

Outstanding chain-extension effect and high UV resistance of polybutylene succinate containing amino-acid-modified layered double hydroxides

• Adam A. Marek,
• Vincent Verney,
• Christine Taviot-Gueho,
• Grazia Totaro,
• Laura Sisti,
• Annamaria Celli and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 684–695, doi:10.3762/bjnano.10.68

• spectroscopy (FTIR) and thermogravimetric analysis (TGA). As expected, the UV–vis spectra showed absorbance in the UVC and UVB regions and the potential role as UV stabilizers. In a second part, PBS composites were prepared with 5 wt % of LDH filler by melt blending and once again fully characterized (XRD, TGA

Ultrasonication-assisted synthesis of CsPbBr₃ and Cs₄PbBr₆ perovskite nanocrystals and their reversible transformation

• Longshi Rao,
• Xinrui Ding,
• Xuewei Du,
• Guanwei Liang,
• Yong Tang,
• Kairui Tang and
• Jin Z. Zhang

Beilstein J. Nanotechnol. 2019, 10, 666–676, doi:10.3762/bjnano.10.66

• affect PNCs properties. The effects of the immersion height of the vibrating spear in the liquid were also investigated. The total liquid height was divided into five equal parts as shown in the inset of Figure 3a. Figure 3a shows the PL intensity (UV–vis absorbance at 400 nm) of four samples that were

• amount of water was increased, the intensity of the absorption peak at about 510 nm increased steadily (inset in Figure 6b). Compared with the excitonic absorption peak of Cs4PbBr6 PNCs, the product displayed only weak absorbance. Figure 6c demonstrates the PL emission spectra of the samples during the

Reduced graphene oxide supported C₃N₄ nanoflakes and quantum dots as metal-free catalysts for visible light assisted CO₂ reduction

• Md Rakibuddin and
• Haekyoung Kim

Beilstein J. Nanotechnol. 2019, 10, 448–458, doi:10.3762/bjnano.10.44

• absorbance spectra were measured using a UV–visible spectrophotometer (Thermo Fisher Scientific). Gas chromatography coupled with mass spectrometry (GC–MS) was carried out on an Agilent 7890A instrument with both a thermal conductivity detector and a flame ionization detector and using helium as a carrier

Gold nanoparticles embedded in a polymer as a 3D-printable dichroic nanocomposite material

• Lars Kool,
• Anton Bunschoten,
• Aldrik H. Velders and
• Vittorio Saggiomo

Beilstein J. Nanotechnol. 2019, 10, 442–447, doi:10.3762/bjnano.10.43

• embedded in solid PVA. This effect is proven when the AuNP–PVA is dissolved in water, releasing the nanoparticles, giving almost the same absorption band as the original dichroic solution (Figure 2b and Supporting Information File 1, Figure S6). The small difference in absorbance of 6 nm can be attributed

Amorphous Ni_xCo_yP-supported TiO₂ nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution

• Yong Li,
• Peng Yang,
• Bin Wang and
• Zhongqing Liu

Beilstein J. Nanotechnol. 2019, 10, 62–70, doi:10.3762/bjnano.10.6

• the samples. (a) TNAs, (b) NixCoyP/TNAs. (a) TEM and (b) HR-TEM images of the NixCoyP/TNAs. HAADF STEM image and EDS elemental maps of the NixCoyP/TNAs. High-resolution XPS spectra of (a) Ti 2p, (b) O 1s, (c) Ni 2p, (d) Co 2p and (e) P 2p of the NixCoyP/TNAs. (f) UV–vis diffuse reflection absorbance

Zn/F-doped tin oxide nanoparticles synthesized by laser pyrolysis: structural and optical properties

• Florian Dumitrache,
• Iuliana P. Morjan,
• Elena Dutu,
• Ion Morjan,
• Claudiu Teodor Fleaca,
• Monica Scarisoreanu,
• Alina Ilie,
• Marius Dumitru,
• Cristian Mihailescu,
• Adriana Smarandache and
• Gabriel Prodan

Beilstein J. Nanotechnol. 2019, 10, 9–21, doi:10.3762/bjnano.10.2

• quality with respect to SnO2 size. This behavior is sustained by the Eg mode extinction in the last sample. Optical and electrical properties Figure 5a shows UV–vis absorbance spectra of only F-doped and Zn/F co-doped SnO2 nanoparticles. It is well known that the absorbance depends on factors such as the

• values. A clear optical behavior influence of the presence of carbon layers on tin dioxide can be observed for the SnO2@C and SnO2@SiO2@C nanostructured microspheres (C symbolizing here reduced graphene oxide, rGO) reported in [53], where the UV–vis spectra show a clear increase in absorbance (mostly in

• samples, yet in our case, the UV–vis absorption in this region seems to be considerably lower. Unfortunately, in the methods employed to extract the absorbance (diffuse reflectance spectroscopy using BaSO4 reflectance standard in [53] vs direct absorption from ethanolic suspensions in our study), the

Co-intercalated layered double hydroxides as thermal and photo-oxidation stabilizers for polypropylene

• Qian Zhang,
• Qiyu Gu,
• Fabrice Leroux,
• Pinggui Tang,
• Dianqing Li and
• Yongjun Feng

Beilstein J. Nanotechnol. 2018, 9, 2980–2988, doi:10.3762/bjnano.9.277

• in the composite. Figure 7a depicts the FTIR spectra of HnMn′-Ca2Al/PP composites in absorbance mode. Here, all composites present the characteristic bands of PP: 2950, 2915, 2868, 2837, 1454, and 1375 cm−1. Some additional bands assigned to LDHs and guest anions are also observed after addition of

In situ characterization of nanoscale contaminations adsorbed in air using atomic force microscopy

• Jesús S. Lacasa,
• Lisa Almonte and
• Jaime Colchero

Beilstein J. Nanotechnol. 2018, 9, 2925–2935, doi:10.3762/bjnano.9.271

• 46556, USA 10.3762/bjnano.9.271 Abstract Under ambient conditions, surfaces are rapidly modified and contaminated by absorbance of molecules and a variety of nanoparticles that drastically change their chemical and physical properties. The atomic force microscope tip–sample system can be considered a

Controlling surface morphology and sensitivity of granular and porous silver films for surface-enhanced Raman scattering, SERS

• Sherif Okeil and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2018, 9, 2813–2831, doi:10.3762/bjnano.9.263

• absorbance (Figure 9b). While the absorbance decreases for longer wavelengths it increases for shorter wavelengths resulting in the formation of an absorption shoulder due to surface plasmons. While this effect is hardly visible for 30 s nitrogen plasma treatment time at about 650 nm, it becomes much more

Size-selected Fe₃O₄–Au hybrid nanoparticles for improved magnetism-based theranostics

• Maria V. Efremova,
• Yulia A. Nalench,
• Eirini Myrovali,
• Anastasiia S. Garanina,
• Ivan S. Grebennikov,
• Polina K. Gifer,
• Maxim A. Abakumov,
• Marina Spasova,
• Makis Angelakeris,
• Alexander G. Savchenko,
• Michael Farle,
• Natalia L. Klyachko,
• Alexander G. Majouga and
• Ulf Wiedwald

Beilstein J. Nanotechnol. 2018, 9, 2684–2699, doi:10.3762/bjnano.9.251

• carefully replaced in the new 96-well plate. The absorbance of the solution was measured at 490 nm using a Thermo Scientific Multiskan GO spectrometer. Apoptosis/necrosis detection. In parallel with the preparation of samples for MTS assay we prepared samples for cell death detection using an apoptosis

Polarization-dependent strong coupling between silver nanorods and photochromic molecules

• Gwénaëlle Lamri,
• Alessandro Veltri,
• Jean Aubard,
• Pierre-Michel Adam,
• Nordin Felidj and
• Anne-Laure Baudrion

Beilstein J. Nanotechnol. 2018, 9, 2657–2664, doi:10.3762/bjnano.9.247

• 90 nm and the lengths vary from 90 to 180 nm. (c) Absorbance spectrum of a 60 nm thick active layer before (SPY) and after (MC) the photochromic transition. (d) Variations of the refractive index real and imaginary parts of the organic layer due to the photochromic transition, measured by

Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

• Jesús A. Díaz-Real,
• Geyla C. Dubed-Bandomo,
• Juan Galindo-de-la-Rosa,
• Luis G. Arriaga,
• Janet Ledesma-García and
• Nicolas Alonso-Vante

Beilstein J. Nanotechnol. 2018, 9, 2628–2643, doi:10.3762/bjnano.9.244

• pass) of 1 cm. The MB dissolution was recirculated using a peristaltic pump to a standard quartz cuvette where the absorbance at 638 nm was measured in situ. In a typical experiment, a fixed ratio of 12.5:1 (volume/area) was used for all the samples while a potential bias of 1 V/(Ag|AgCl) was applied

• pump to recirculate it to the PEC cell using a volume of 12.5 mL. At the end of the PEC treatment, the absorbance of the solution was analyzed using an UV–vis spectrometer (Optizen, model Pop). Raman spectra were recorded for these solutions with a Horiba Jobim-Yvon instrument (model Xplora ONE

Enhancement of X-ray emission from nanocolloidal gold suspensions under double-pulse excitation

• Wei-Hung Hsu,
• Frances Camille P. Masim,
• Armandas Balčytis,
• Hsin-Hui Huang,
• Tetsu Yonezawa,
• Aleksandr A. Kuchmizhak,
• Saulius Juodkazis and
• Koji Hatanaka

Beilstein J. Nanotechnol. 2018, 9, 2609–2617, doi:10.3762/bjnano.9.242

• speed of light in vacuum, A is the absorbance, εb is the binding energy [eV/atom], and Ji is the ionization potential. The threshold fluence for the creation of the ENZ state is calculated for full ionization, i.e., with the bandgap energy Δg in Equation 3 instead of (εb + Ji). For water, Δg = 9.5 eV

Au–Si plasmonic platforms: synthesis, structure and FDTD simulations

• Anna Gapska,
• Marcin Łapiński,
• Paweł Syty,
• Wojciech Sadowski,
• Józef E. Sienkiewicz and
• Barbara Kościelska

Beilstein J. Nanotechnol. 2018, 9, 2599–2608, doi:10.3762/bjnano.9.241

• . This sample was subsequently chosen for theoretical calculations. Simulations of electromagnetic field propagation through the produced samples were performed using the finite-difference time domain (FDTD) method. The calculated absorbance, as a result of the FDTD simulation shows a quite good

• frequency domain, which in turn gives results of the properties in a wide-range frequency spectrum, e.g., absorbance and transmittance of the sample, which could be directly compared to results from UV–vis measurements. The combination of experimental and computational methods in the design of materials or

• efficient diffusion barrier against metal atoms [24], so Au–Si monoatomic layer could be present on the surface of the support. Exemplary absorbance spectra recorded for the 2.8 nm Au film after annealing at 550 °C for 15 min is presented in Figure 10. A strong maximum corresponding to plasmon resonance is

Non-agglomerated silicon–organic nanoparticles and their nanocomplexes with oligonucleotides: synthesis and properties

• Asya S. Levina,
• Marina N. Repkova,
• Nadezhda V. Shikina,
• Zinfer R. Ismagilov,
• Svetlana A. Yashnik,
• Dmitrii V. Semenov,
• Yulia I. Savinovskaya,
• Natalia A. Mazurkova,
• Inna A. Pyshnaya and
• Valentina F. Zarytova

Beilstein J. Nanotechnol. 2018, 9, 2516–2525, doi:10.3762/bjnano.9.234

• presented as absorbance after computer processing, in particular, subtraction of the water spectrum (solvent) from the spectrum of the solution was performed (Figure 2a). The electron spectrum of the Si–NH2 solution was taken on a Shimadzu UV-2501PC spectrophotometer (Shimadzu, Japan) in the absorbance mode

Enhanced antineoplastic/therapeutic efficacy using 5-fluorouracil-loaded calcium phosphate nanoparticles

• Shanid Mohiyuddin,
• Saba Naqvi and
• Gopinath Packirisamy

Beilstein J. Nanotechnol. 2018, 9, 2499–2515, doi:10.3762/bjnano.9.233

• purple formazan was confirmed by microscopic observation and 100 µL DMSO was added to dissolve the formazan crystals. The formazan crystal formation was spectroscopically characterized using a multimode microplate reader (Cytation3, Biotek) at 570 nm absorbance. The percent of cell viability was

Thickness-dependent photoelectrochemical properties of a semitransparent Co₃O₄ photocathode

• Malkeshkumar Patel and
• Joondong Kim

Beilstein J. Nanotechnol. 2018, 9, 2432–2442, doi:10.3762/bjnano.9.228

• photoelectrochemical cell properties. Figure 2a shows the thickness-dependent transmittance (T) and absorbance (A) spectra of the Co3O4 samples. Interestingly, all the Co3O4 samples exhibited fair absorbance with semitransparent optical properties. Absorbance dominates the shorter wavelengths (λ = 300–500 nm) with

• of 1.5 mA·cm−2 corresponded to the reduction of the water when using a 170 nm thick Co3O4 sample. This sample provided enhanced photocurrent performance in the PEC cell, due to its enhanced porosity and absorbance. By using dual Co3O4 photoelectrodes, a hydrogen gas generation rate of 14.35 mL·h−1·cm

• out using a UV–visible spectrophotometer (Shimadzu, UV-2600) by recording the transmittance, absorbance, and reflection of the Co3O4 films in the range of 300–1100 nm. Photoelectrochemical cell measurements: Photoelectrochemical measurements were performed in a three-electrode cell with a potentiostat

SERS active Ag–SiO₂ nanoparticles obtained by laser ablation of silver in colloidal silica

• Cristina Gellini,
• Francesco Muniz-Miranda,
• Alfonso Pedone and
• Maurizio Muniz-Miranda

Beilstein J. Nanotechnol. 2018, 9, 2396–2404, doi:10.3762/bjnano.9.224

• unchanged at the same wavelength and with the same bandwidth. Ten minutes of laser ablation are sufficient to obtain a plasmon absorbance more than 2.5 in a 10 mm cuvette. However, a much larger silver content could be obtained with longer ablation times without compromising the colloidal stability. We have