Magnetic properties of biofunctionalized iron oxide nanoparticles as magnetic resonance imaging contrast agents

• Natalia E. Gervits,
• Andrey A. Gippius,
• Alexey V. Tkachev,
• Evgeniy I. Demikhov,
• Sergey S. Starchikov,
• Igor S. Lyubutin,
• Alexander L. Vasiliev,
• Vladimir P. Chekhonin,
• Maxim A. Abakumov,
• Alevtina S. Semkina and
• Alexander G. Mazhuga

Beilstein J. Nanotechnol. 2019, 10, 1964–1972, doi:10.3762/bjnano.10.193

• ]. Experimental methods TEM of pure and HSA-coated MNPs was performed using a Titan 80-300 TEM/STEM (ThermoFisher Scientific, USA) operated at 300 kV. XRD spectroscopy was carried out with a Rigaku MiniFlex diffractometer using Cu Kα radiation. The Mössbauer absorption spectra of 57Fe nuclei were recorded in the

Pulsed laser synthesis of highly active Ag–Rh and Ag–Pt antenna–reactor-type plasmonic catalysts

• Kenneth A. Kane and
• Massimo F. Bertino

Beilstein J. Nanotechnol. 2019, 10, 1958–1963, doi:10.3762/bjnano.10.192

• were found to only adsorb to concavities. The 1:1 Ag–Pt system formed similar heterostructures. A series of HR-TEM images confirming the atomic makeup of the heterostructures is reported in Figure S3 (Supporting Information File 1). UV–vis absorption spectra of the monometallic and mixed colloids are

• suspensions generated via pulsed laser ablation. Rh nanoparticle groupings were observed to only adsorb to Ag nanostructure concavities. Similar Ag–Pt heterostructures formed in the mixtures of colloidal Ag and Pt suspensions. UV–vis absorption spectra of the monometallic Ag, Pt, Rh, and the colloidal Ag–Rh

Charge-transfer interactions between fullerenes and a mesoporous tetrathiafulvalene-based metal–organic framework

• Manuel Souto,
• Joaquín Calbo,
• Samuel Mañas-Valero,
• Aron Walsh and
• Guillermo Mínguez Espallargas

Beilstein J. Nanotechnol. 2019, 10, 1883–1893, doi:10.3762/bjnano.10.183

• photoinduced CT process of C60@MUV-2. Figure 8 displays the simulated absorption spectra predicted for the cluster C60@TTFTB system in the most stable arrangement B, the TTFTB ligand, and the fullerene guest (the triplet excitation energies are indicated). The high-energy region (below 400 nm) of the

• ). Raman spectra were acquired with a micro-Raman (model XploRA ONE from Horiba, Kyoto, Japan) with a grating of 1200 gr/mm and a wavelength of 785 nm. UV–vis absorption spectra were recorded on a Jasco V-670 spectrophotometer in baseline mode from 400 to 800 nm range. The absorption spectra were measured

• ). Blue and yellow regions indicate charge depletion and accumulation, respectively. a) TDDFT absorption spectra calculated at the CAM-B3LYP/6-31G** level for host–guest C60@TTFTB (including vertical excitation energies), TTFTB ligand, and fullerene C60 (singlets and triplet energies). b) Monoelectronic

Biocatalytic oligomerization-induced self-assembly of crystalline cellulose oligomers into nanoribbon networks assisted by organic solvents

• Yuuki Hata,
• Yuka Fukaya,
• Toshiki Sawada,
• Masahito Nishiura and
• Takeshi Serizawa

Beilstein J. Nanotechnol. 2019, 10, 1778–1788, doi:10.3762/bjnano.10.173

• , and 22.1° (Figure 7), which corresponded to 110, and 020 of the cellulose II allomorph, respectively [30]. In addition, the ATR-FTIR absorption spectra showed two characteristic peaks for the intrachain hydrogen-bonded hydroxyl groups in the cellulose II allomorph [51] at approximately 3441 and 3490

• for cellulose II are shown above the peaks. ATR-FTIR absorption spectra of the products with organic solvents. The numbers above the peaks denote the wavenumber. SEM images of the xerogels prepared from the gels synthesized with (a,b) 10 vol % DMSO, (c,d) 20 vol % DMSO, and (e,f) 10 vol % EtOH

High-temperature resistive gas sensors based on ZnO/SiC nanocomposites

• Vadim B. Platonov,
• Marina N. Rumyantseva,
• Alexander S. Frolov,
• Alexey D. Yapryntsev and
• Alexander M. Gaskov

Beilstein J. Nanotechnol. 2019, 10, 1537–1547, doi:10.3762/bjnano.10.151

• the SiC peaks naturally increases with increasing silicon carbide content in the nanocomposites. The study of the surface composition of the synthesized materials was carried out using FTIR and XPS methods. Figure 4 shows the IR absorption spectra of ZnO, SiC, and ZnO/SiC nanocomposites. The spectrum

BiOCl/TiO₂/diatomite composites with enhanced visible-light photocatalytic activity for the degradation of rhodamine B

• Minlin Ao,
• Kun Liu,
• Xuekun Tang,
• Zishun Li,
• Qian Peng and
• Jing Huang

Beilstein J. Nanotechnol. 2019, 10, 1412–1422, doi:10.3762/bjnano.10.139

• ), and BTD prepared with different calcination temperatures (c and f). UV–vis absorption spectra (a) and band gap energy (b) of various samples. Mott–Schottky plots of BiOCl (a) and TiO2/diatomite (b). Photoluminescence spectra (a), transient photocurrent spectra (b) and electrochemical impedance spectra

Highly ordered mesoporous silica film nanocomposites containing gold nanoparticles for the catalytic reduction of 4-nitrophenol

• Mohamad Azani Jalani,
• Leny Yuliati,
• Siew Ling Lee and
• Hendrik O. Lintang

Beilstein J. Nanotechnol. 2019, 10, 1368–1379, doi:10.3762/bjnano.10.135

• corresponding FFT patterns (top) and auto-correlation images (bottom). Absorption spectra of a) [AuNPs]cal/silicahex and b) [AuNPs]red/silicahex films at (a) 190, (b) 210, (c) 230, (d) 250 and (e) 450 °C. The insets show representative photography images for the as-synthesized films after both heat treatments

Construction of a 0D/1D composite based on Au nanoparticles/CuBi₂O₄ microrods for efficient visible-light-driven photocatalytic activity

• Weilong Shi,
• Mingyang Li,
• Hongji Ren,
• Feng Guo,
• Xiliu Huang,
• Yu Shi and
• Yubin Tang

Beilstein J. Nanotechnol. 2019, 10, 1360–1367, doi:10.3762/bjnano.10.134

• indexed to the (111) and (200) planes of Au, respectively, suggesting the Au/CBO composite photocatalyst was successfully prepared [24]. The UV–vis absorption spectra were recorded to discuss the optical properties of the photocatalysts (Figure 2b). Evidently, the absorption edge of pure CBO extended to

Janus-micromotor-based on–off luminescence sensor for active TNT detection

• Ye Yuan,
• Changyong Gao,
• Daolin Wang,
• Chang Zhou,
• Baohua Zhu and
• Qiang He

Beilstein J. Nanotechnol. 2019, 10, 1324–1331, doi:10.3762/bjnano.10.131

• observed using a Hitachi H-7650 microscope. UV−vis absorption spectra were recorded using a Hitachi U-4100 spectrophotometer. FTIR spectra were collected in the wavelength range from 4000 to 500 cm−1 by a Thermo Fisher 4700 Fourier transform infrared spectrophotometer with the KBr method. Upconversion

Revisiting semicontinuous silver films as surface-enhanced Raman spectroscopy substrates

• Malwina Liszewska,
• Bogusław Budner,
• Małgorzata Norek,
• Bartłomiej J. Jankiewicz and
• Piotr Nyga

Beilstein J. Nanotechnol. 2019, 10, 1048–1055, doi:10.3762/bjnano.10.105

• have a different scan area than the other samples. Transmittance, reflectance and absorption spectra of A– I SSF films. SERS spectra of 4-ATP molecules on A–I SSFs. SERS signal of 1080 cm−1 band measured on SSFs A–I (Raw) and normalized by their metal coverage (Normalized). The AFM-determined

Structural and optical properties of penicillamine-protected gold nanocluster fractions separated by sequential size-selective fractionation

• Xiupei Yang,
• Zhengli Yang,
• Fenglin Tang,
• Jing Xu,
• Maoxue Zhang and
• Martin M. F. Choi

Beilstein J. Nanotechnol. 2019, 10, 955–966, doi:10.3762/bjnano.10.96

• source at 1253.6 eV (10 kV, 20 mA). Thermogravimetric analysis (TGA) measurements were conducted with a Perkin-Elmer TGA 6 thermogravimetric analyzer (Waltham, MA, USA). In addition, the UV–vis absorption spectra of the crude AuNC product and the AuNC fractions were recorded on a Cary 100 Scan UV–vis

• absorption and photoluminescence properties UV–vis absorption spectra of the AuNC crude product and the fractions are displayed in Figure 9. In order to eliminate the effect of concentration changes on the comparison of spectral shape and band position, these spectra are normalized at 250 nm. The smaller

• AuNCs possess a sharper decrease in absorbance than that of larger ones, from shorter to longer wavelengths, as could be observed in previous work [38][39]. In essence, the large AuNCs produce absorption spectra that have higher absorption than that of the small core nanoclusters. The difference in the

Nanoscale optical and structural characterisation of silk

• Meguya Ryu,
• Reo Honda,
• Adrian Cernescu,
• Arturas Vailionis,
• Armandas Balčytis,
• Jitraporn Vongsvivut,
• Jing-Liang Li,
• Denver P. Linklater,
• Elena P. Ivanova,
• Vygantas Mizeikis,
• Mark J. Tobin,
• Junko Morikawa and
• Saulius Juodkazis

Beilstein J. Nanotechnol. 2019, 10, 922–929, doi:10.3762/bjnano.10.93

• -FTIR absorption and reflectivity spectra, shown in Figure 5. The amide-I and amide-II bands were well reproduced in the absorption spectra collected from four different single points. However, only spectra from two measurement points are displayed in Figure 5 for a better clarity of presentation

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

• vibrational stretching at 1240 cm−1 and 1060 cm−1 is from aromatic esters and primary alcohols (–CH2OH), respectively. Moreover, an increase in the aromatic bending is observed [43]. Ultraviolet–visible spectroscopy The UV–vis absorption spectra of nGO and PEG-nGO are shown in Figure 3. The absorption spectra

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

• (progressing from top to bottom); the leftmost images correspond to the mapping images of full elements. UV–vis–NIR absorption spectra of the various prepared samples. XRD patterns of the various prepared samples. Electric polarization curve for the various prepared samples. Nyquist diagram of the prepared

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

• PC spectrophotometer. Kubelka–Munk theory was applied to the LDH filler data to transform the diffuse reflectance spectra into absorption spectra. The fluorescence spectra of PBS–LDH nanocomposites were recorded with a Perkin-Elmer LS-55 luminescence spectrophotometer equipped with a front surface

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

• properties of colloidal CsPbBr3 PNCs, UV–vis absorption spectra and PL emission spectra were recorded. As shown in Figure 1e, the first excitonic absorption peak was located at 510 nm and the strong PL emission band centered at 516 nm was observed with a narrow full width at half maximum (FWHM) of 18 nm

• properties of CsPbBr3 PNCs. To avoid breaking the bottle, the immersion height of the vibrating spear and radiation time are 4/5 and 30 min, respectively. Figure 2a shows the change of UV–vis absorption spectra and PL spectra of the CsPbBr3 PNCs that were synthesized at 90, 120, 150, 180, and 210 W of

• intensity of CsPbBr3 PNCs slowly decrease, while new strong absorption features in the UV region (ca. 315 nm) emerge, which have been confirmed to result from the formation of Cs4PbBr6 PNCs [25]. When adding equal amounts of OAm and OA, there are no other peaks in the UV–vis absorption spectra except for

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

• File 1, Figure S6). The UV–visible absorption spectra of the product used for the determination of HCHO in the presence of different GCN hybrids are shown in Figure 10. It is observed from the UV spectra that with increasing irradiation time, the peak of the DDL complex also increased due to effective

• ) after acid treatment of g-C3N4, c) CN-5 quantum dots, d) CN-10 nanoflakes, e) CN-20 nanoflakes and f) the GCN-5 material. High-resolution transmission electron microscopy images of the GCN-5 quantum dots. UV–vis absorption spectra of the photogenerated HCHO with Nash reagent (a–c), and (d) production

Surface plasmon resonance enhancement of photoluminescence intensity and bioimaging application of gold nanorod@CdSe/ZnS quantum dots

• Siyi Hu,
• Yu Ren,
• Yue Wang,
• Jinhua Li,
• Junle Qu,
• Liwei Liu,
• Hanbin Ma and
• Yuguo Tang

Beilstein J. Nanotechnol. 2019, 10, 22–31, doi:10.3762/bjnano.10.3

• . Characterization The PL emission spectrum of the QDs was measured with a Cary Eclipse fluorescence spectrophotometer (Agilent, CA, USA) at an excitation wavelength of 430 nm. UV–visible absorption spectra were collected using a Cary 5000 spectrophotometer (Agilent, CA, USA). The lifetime of the nanoparticles was

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

• give information on the elemental analysis (excluding hydrogen) on the samples. The analysis of absorbance (A) data obtained by UV–vis–NIR spectrophotometry was performed on 0.01 g nanopowder sample suspended in 20 mL ethanol. The absorption spectra were registered using the computer-aided double-beam

• (bottom) samples. a) The Raman spectra of the as-prepared samples; b) The dependence from the Raman and XPS analysis. a) Optical absorption spectra of the nanoparticles, b) Tauc’s plot for Zn/F-doped and undoped SnO2 nanoparticles (αhν)2 versus (hν). Electrical resistivity measurements. Evaluation of the

The nanoscaled metal-organic framework ICR-2 as a carrier of porphyrins for photodynamic therapy

• Jan Hynek,
• Sebastian Jurík,
• Martina Koncošová,
• Jaroslav Zelenka,
• Ivana Křížová,
• Tomáš Ruml,
• Kaplan Kirakci,
• Ivo Jakubec,
• František Kovanda,
• Kamil Lang and
• Jan Demel

Beilstein J. Nanotechnol. 2018, 9, 2960–2967, doi:10.3762/bjnano.9.275

• corresponding spectra of the free porphyrins. The absorption spectra show characteristic absorption bands of metal-free porphyrins: the Soret band at 415 nm and four Q-bands in the region between 500 and 650 nm. The comparison of the absorption spectra of free TPPPi(Ph) and corresponding nanoICR-2/TPPPi(Ph

• ]. UV–vis absorption spectra of the dispersions were recorded on a Perkin Elmer Lambda 35 spectrometer. High-resolution transmission electron microscopy (TEM) was carried out on a JEOL JEM 3010 microscope operated at 300 kV (LaB6 cathode, point resolution 1.7 Å) with an Oxford Instruments Energy

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

• plasma treated silver films Figure 9a shows the UV–vis absorption spectra obtained after two different hydrogen rf plasma treatment times in comparison to the silver film before plasma treatment. With increasing hydrogen plasma treatment time, the absorption decreases over the entire spectrum while the

• decrease is more prominent for longer wavelengths as can be seen for the 2 min hydrogen plasma treatment. This decrease in absorption in the hydrogen plasma treated films might be due to the etching of the silver film. For nitrogen plasma treatment the absorption spectra do not show an overall decrease in

Comparative biological effects of spherical noble metal nanoparticles (Rh, Pd, Ag, Pt, Au) with 4–8 nm diameter

• Alexander Rostek,
• Marina Breisch,
• Kevin Pappert,
• Kateryna Loza,
• Marc Heggen,
• Manfred Köller,
• Christina Sengstock and
• Matthias Epple

Beilstein J. Nanotechnol. 2018, 9, 2763–2774, doi:10.3762/bjnano.9.258

• -normal distribution fit to determine the number-weighted diameter. UV–vis absorption spectra of PVP-stabilized noble metal nanoparticles (Rh, Pd, Pt, Ag, Au). Effects of nanoparticles on the viability and the morphology of human mesenchymal stem cells (hMSCs). hMSCs in 24-well cell culture plates were

Oriented zinc oxide nanorods: A novel saturable absorber for lasers in the near-infrared

• Pavel Loiko,
• Tanujjal Bora,
• Josep Maria Serres,
• Haohai Yu,
• Magdalena Aguiló,
• Francesc Díaz,
• Uwe Griebner,
• Valentin Petrov,
• Xavier Mateos and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2018, 9, 2730–2740, doi:10.3762/bjnano.9.255

• spectroscopy The results on the optical absorption and luminescence of the ZnO NRs are summarized in Figure 3. The small-signal (internal) absorption spectra of the ZnO NRs grown for 5–15 h are shown in Figure 3a. The spectra were corrected for the Fresnel losses arising from the substrate, T(ZnO NRs) = T(ZnO

• possible source for the near-IR absorption. For longer NRs, one can expect more VZn−1 vacancies and stronger near-IR absorption, in agreement with Figure 3a. In Figure 3c, we compare the small-signal absorption spectra of ZnO NRs grown for 10 h and several well-known nanostructured “fast” SAs, namely a

• 2 cm−1). An integration time of 30 s was used. The absorption spectra were measured using a CARY 5000 spectrophotometer (Varian). The absorption saturation of the ZnO NRs was studied by the open-aperture Z-scan method. As an excitation source, a mode-locked 1.064 µm Nd laser was used with the

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

• irradiation time of the silver target was about 10 min. TEM samples were obtained by dropping a small amount of colloid onto carbon-coated copper grids and allowing it to evaporate. The images were recorded with a Philips CM12 at 120 kV. UV–visible absorption spectra of the colloidal suspensions were obtained

• polycyclic aromatic hydrocarbons, polychlorinated biphenyls, organochlorine pesticides, dioxins, nitroaromatic derivatives, and many others. These molecules, which normally do not interact with silver, could be effectively adsorbed on silica nanoparticles. UV–visible absorption spectra of colloidal silica (A

The role of adatoms in chloride-activated colloidal silver nanoparticles for surface-enhanced Raman scattering enhancement

• Nicolae Leopold,
• Andrei Stefancu,
• Krisztian Herman,
• István Sz. Tódor,
• Stefania D. Iancu,
• Vlad Moisoiu and
• Loredana F. Leopold

Beilstein J. Nanotechnol. 2018, 9, 2236–2247, doi:10.3762/bjnano.9.208

• transmission electron microscope (STEM), equipped with a cold field emission gun, working at an acceleration voltage of 200 kV. The absorption spectra were recorded with a Jasco V-630 UV–vis spectrometer at 1 nm spectral resolution. Raman and SERS spectra were obtained with a Renishaw InVia Raman microscope