Evolution of Ag nanostructures created from thin films: UV–vis absorption and its theoretical predictions

• Robert Kozioł,
• Marcin Łapiński,
• Paweł Syty,
• Damian Koszelow,
• Wojciech Sadowski,
• Józef E. Sienkiewicz and
• Barbara Kościelska

Beilstein J. Nanotechnol. 2020, 11, 494–507, doi:10.3762/bjnano.11.40

• operated at 10 kV. For the analysis of nanograin structure and chemical composition a TALOS F200X HRTEM equipped with an EDS detector was used. SEM and TEM experiments were carried out on samples deposited on silicon substrates. UV–vis spectra were recorded using a double-beam Thermo Fisher Scientific

• nanostructures is shown in Figure 7a–g. The shape of nanostructures is clearly visible in the HRTEM image (Figure 8a). The film from which the nanostructures were formed was 3 nm thick and was annealed at 550 °C for 15 min. The nanostructures are slightly flattened, but as follows from EDS analysis (Figure 8b

• (f) 600 °C; (g) average nanostructure diameter as a function of the annealing temperature. (a) HRTEM image of a cross section of a nanoisland formed from a 3 nm thick film, annealed at 550 °C for 15 min; (b) EDS analysis and (c) detailed EDS analysis of the cross section of the nanoisland. Absorbance

Simple synthesis of nanosheets of rGO and nitrogenated rGO

• Pallellappa Chithaiah,
• Madhan Mohan Raju,
• Giridhar U. Kulkarni and
• C. N. R. Rao

Beilstein J. Nanotechnol. 2020, 11, 68–75, doi:10.3762/bjnano.11.7

• Mira3 field-emission scanning electron microscope (FESEM) equipped with an energy-dispersive X-ray spectroscopy (EDS). The TEM, HRTEM images and SAED patterns were obtained on a TALOS F200S G2, 200 kV FEG, and a CMOS camera (4k × 4k). The TEM samples were prepared by suspending the samples in ethanol

Synthesis of amorphous and graphitized porous nitrogen-doped carbon spheres as oxygen reduction reaction catalysts

• Maximilian Wassner,
• Markus Eckardt,
• Andreas Reyer,
• Thomas Diemant,
• Michael S. Elsaesser,
• R. Jürgen Behm and
• Nicola Hüsing

Beilstein J. Nanotechnol. 2020, 11, 1–15, doi:10.3762/bjnano.11.1

• (HRTEM) images of the resulting particles showed that the graphite layers are arranged along the longitudinal axis of the fibers [37]. After the acidic washing process, neither XPS nor EDX showed, for g-NCS-850 and g-NCS-1000, Fe or Fe3C particles within the spheres, which are commonly found for the Fe

Synthesis and acetone sensing properties of ZnFe₂O₄/rGO gas sensors

• Kaidi Wu,
• Yifan Luo,
• Ying Li and
• Chao Zhang

Beilstein J. Nanotechnol. 2019, 10, 2516–2526, doi:10.3762/bjnano.10.242

• (FESEM, Hitachi S4800). The nanostructure of the products was examined by transmission electron microscopy (TEM, JEM-2100). High-resolution TEM (HRTEM) and energy-dispersive X-ray (EDX) elemental mappings were recorded using a field-emission transmission electron microscope (Tecnai G2 F30 S-TWIN, FEI

• % rGO was carried out using TEM and HRTEM (Figure 6). As obvious from Figure 6a and Figure 6b, the ZnFe2O4 spheres are uniformly distributed on the rGO nanosheets. The HRTEM image shown in Figure 6c shows two planes with lattice spacing of ca. 0.25 and 0.21 nm, which correspond to the (311) and the (400

• wt % of rGO. TEM images of (a) the 0.5 wt % ZnFe2O4/rGO spheres and (b) the 1 wt % ZnFe2O4/rGO spheres. (c) HRTEM image of the 0.5 wt % ZnFe2O4/rGO sample, the corresponding FFT image is shown in the inset. (d) SAED pattern of the 0.5 wt % ZnFe2O4/rGO sample and (e) HAADF-STEM image of the 0.5 wt

Multiwalled carbon nanotube based aromatic volatile organic compound sensor: sensitivity enhancement through 1-hexadecanethiol functionalisation

• Nadra Bohli,
• Meryem Belkilani,
• Juan Casanova-Chafer,
• Eduard Llobet and
• Adnane Abdelghani

Beilstein J. Nanotechnol. 2019, 10, 2364–2373, doi:10.3762/bjnano.10.227

• temperature toluene and benzene sensor based on multiwall carbon nanotubes (MWCNTs) decorated with gold nanoparticles and functionalised with a long-chain thiol self-assembled monolayer, 1-hexadecanethiol (HDT). High-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared

• [20]. Figure 1 shows the synoptic structure of the sensor before and after the HDT deposition. HRTEM and FTIR characterisation The analysis of the quantity and distribution of the gold nanoparticles attached to the MWCNTs was undertaken with a high-resolution transmission electron microscope (JEOL

• mechanically moved from the substrate onto a TEM Cu-grid for conducting TEM analysis. Figure 2 displays HRTEM images at a magnification of (a) 300 K, (b) 600 K and (c) 400 K. The HRTEM analysis indicates an average gold nanoparticle size of 2 nm. We clearly see in Figure 2b a fairly homogeneous Au nanoparticle

Design and facile synthesis of defect-rich C-MoS₂/rGO nanosheets for enhanced lithium–sulfur battery performance

• Chengxiang Tian,
• Juwei Wu,
• Zheng Ma,
• Bo Li,
• Pengcheng Li,
• Xiaotao Zu and
• Xia Xiang

Beilstein J. Nanotechnol. 2019, 10, 2251–2260, doi:10.3762/bjnano.10.217

• transition-metal dichalcogenide composites for energy storage applications. Schematic illustration of the synthesis of C-MoS2/rGO composite. (a) SEM and (b) TEM images of pristine MoS2; (c) SEM and (d) TEM images of C-MoS2/rGO; (e) SEM image of MoS2-S and (f) SEM image of C-MoS2/rGO-S; (g, h) HRTEM images of

• pristine MoS2 and (i, j) HRTEM images of C-MoS2/rGO. Morphological images of the annealed C-MoS2/rGO-6 composite: (a) SEM; (b) TEM; (c, d) HRTEM; (e) SEM image of C-MoS2/rGO-6-S; (f) TG analysis curve; (g–j) element mapping images of Mo, S, and C. (a) XRD patterns, (b) Raman spectra, (c) full scan XPS

Targeted therapeutic effect against the breast cancer cell line MCF-7 with a CuFe₂O₄/silica/cisplatin nanocomposite formulation

• B. Rabindran Jermy,
• Vijaya Ravinayagam,
• Widyan A. Alamoudi,
• Dana Almohazey,
• Hatim Dafalla,
• Lina Hussain Allehaibi,
• Abdulhadi Baykal,
• Muhammet S. Toprak and
• Thirunavukkarasu Somanathan

Beilstein J. Nanotechnol. 2019, 10, 2217–2228, doi:10.3762/bjnano.10.214

• distribution of (a) HYPS and (b) 30 wt% CuFe2O4/HYPS. FTIR spectra of HYPS and 30 wt % CuFe2O4/HYPS. Transmission electron microscopy of (a, b) 30 wt % CuFe2O4/HYPS at different scale magnifications and (c, d) high-resolution TEM (HRTEM) images of CuFe2O4/HYPS. Vibrating sample magnetometer spectrum of 30 wt

Ultrathin Ni_1−xCo_xS₂ nanoflakes as high energy density electrode materials for asymmetric supercapacitors

• Xiaoxiang Wang,
• Teng Wang,
• Rusen Zhou,
• Lijuan Fan,
• Shengli Zhang,
• Feng Yu,
• Tuquabo Tesfamichael,
• Liwei Su and
• Hongxia Wang

Beilstein J. Nanotechnol. 2019, 10, 2207–2216, doi:10.3762/bjnano.10.213

• . Figure 1f also shows that Ni1−xCoxS2 is composed of nano-sized ultrathin crystal grown side by side. Lattice fringe spacings of around 0.28 and 0.19 nm, which can be indexed to the (002) and (113) planes of nickel–cobalt sulfide, respectively, were measured by using high-resolution TEM (HRTEM, Figure 1g

• ; (b) FESEM images and (c) enlarged FESEM images of Ni1−xCoxS2 nanoparticles; (d–g) TEM, HRTEM and SAED pattern (inset) of the Ni1−xCoxS2 nanoflakes; (i–m) EDS elements maps of S, Ni, Co, O and C from the image (h). (a) EDS pattern of Ni1−xCoxS2 and high-resolution XPS spectra of (b) Ni 2p, (c) Co 2p

Improved adsorption and degradation performance by S-doping of (001)-TiO₂

• Xiao-Yu Sun,
• Xian Zhang,
• Xiao Sun,
• Ni-Xian Qian,
• Min Wang and
• Yong-Qing Ma

Beilstein J. Nanotechnol. 2019, 10, 2116–2127, doi:10.3762/bjnano.10.206

• the variation of c/a with RS/Ti will be discussed in detail in section below along with the XPS results. Figure 2 shows the TEM and HRTEM images of the 1-S0 (a, d), 2-S0 (b, e), and 2-S2 (c, f) samples. Obviously, the undoped 1-S0 sample synthesized at 180 °C is composed of square sheet-like particles

• , which is the typical morphology of (001)-TiO2 [8][27][28]. The HRTEM image (Figure 2d) of the particle side shows a lattice fringe spacing of 0.238 nm. This corresponds to the (004) crystal face of TiO2 and indicates that the top and bottom square surfaces (indicated by the arrow) are the (001) faces

• [29]. For the samples synthesized at 250 °C, the TEM images (Figure 2b and Figure 2c) of the undoped 2-S0 and S-doped 2-S2 show that the edges and corners of some of the square particles become blurred. The HRTEM images (Figure 2e and Figure 2f) of the particles also exhibit lattice fringes associated

Optimization and performance of nitrogen-doped carbon dots as a color conversion layer for white-LED applications

• Tugrul Guner,
• Hurriyet Yuce,
• Didem Tascioglu,
• Eren Simsek,
• Umut Savaci,
• Aziz Genc,
• Servet Turan and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 2004–2013, doi:10.3762/bjnano.10.197

• :Eu2+, was purchased from Zhuhai Hanbo (HB-640, Guangdong, China). High-resolution transmission electron microscopy (HRTEM; JEOL 2100F, operated at 200 kV) was employed to examine the morphology of the N-CDots. X-ray photoelectron spectroscopy (XPS) studies were performed using a Thermo Scientific K

• Figure 2 shows HRTEM micrographs of several individual nanoparticles identified as carbon quantum dots (CDots). We further diluted the stock solution for the HRTEM analysis in order to obtain the crystal structure of individual CDots avoiding possible agglomerations. As a consequence, the prepared TEM

• nanoparticles instead of power spectra, which show diffraction spots generated by only one plane. Figure 2c shows the HRTEM micrograph of a ≈10 nm diameter nanoparticle. This nanoparticle is identified as being composed of a graphite phase based on the observation of the 0.34 nm lattice spacing values

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

• within the coherent X-ray scattering region, and the size can be slightly different from the values obtained by transmission electron microscopy (TEM). The TEM images of the nanoparticles are presented in Figure 2. The particle size distribution estimated from the high-resolution TEM (HRTEM) images is

• ) indicates that the iron oxide nanoparticles adopted a diamond-type cubic crystal lattice structure (space group ) that is typical for magnetite (Fe3O4) [15] and/or disordered maghemite (γ-Fe2O3) [16]. The HRTEM images of several selected particles in both samples were analyzed by direct measurements of the

• selected in Figure 2 are very similar (a = 0.84 nm), and hence magnetite (Fe3O4) and disordered maghemite γ-Fe2O3 compounds cannot be resolved by HRTEM in such images. The Raman spectrum of the uncoated nanoparticles is shown in Figure 4, and the fitting of the peaks in the frequency region up to 950 cm−1

Fabrication and characterization of Si_1−xGe_x nanocrystals in as-grown and annealed structures: a comparative study

• Muhammad Taha Sultan,
• Adrian Valentin Maraloiu,
• Ionel Stavarache,
• Jón Tómas Gudmundsson,
• Andrei Manolescu,
• Valentin Serban Teodorescu,
• Magdalena Lidia Ciurea and
• Halldór Gudfinnur Svavarsson

Beilstein J. Nanotechnol. 2019, 10, 1873–1882, doi:10.3762/bjnano.10.182

• consequential interface characteristics and its effect on the photocurrent spectra. Keywords: grazing incidence XRD (GIXRD); high-power impulse magnetron sputtering (HiPIMS); HRTEM; magnetron sputtering; photocurrent spectra; SiGe nanocrystals in SiO2/SiGe/SiO2 multilayers; STEM-HAADF; TEM; Introduction

• incidence X-ray diffraction (GIXRD) and high-resolution transmission electron microscopy (HRTEM). Strain relaxation and its effect on the formation of NCs and the resulting interface integrity was studied and compared with structures having a thicker (ca. 200 nm) SiGe layer [23], deposited by radio

• pattern taken on annealed MLs (600 °C, 1 min). (a) XTEM image of MLs annealed at 600 °C (1 min) showing columnar morphology of SiGe NCs in the film. The crystallites have a periodicity of ≈12.5 nm. (b) STEM-HAADF image. (c) HRTEM image with SiGe NCs separated by amorphous regions (with SiGeO). (a) TEM low

Synthesis of nickel/gallium nanoalloys using a dual-source approach in 1-alkyl-3-methylimidazole ionic liquids

• Ilka Simon,
• Julius Hornung,
• Juri Barthel,
• Jörg Thomas,
• Maik Finze,
• Roland A. Fischer and
• Christoph Janiak

Beilstein J. Nanotechnol. 2019, 10, 1754–1767, doi:10.3762/bjnano.10.171

• as NiGa @[BMIm][NTf2] (compare Table 1 and Table 3, Supporting Information File 1, Table S3). TOF values are slightly increased for precipitated, IL-free NiGa nanoparticles. To determine whether the precipitated NiGa nanoparticles used in the catalytic reaction change over time HRTEM images are

• to NiGa nanoparticles. To complete this investigation, GaCp* was successfully decomposed in [BMIm][NTf2] to Ga2O3-doped Ga particles with a size of 350 ± 100 nm. The formation of core–shell sparticles can be ruled out by HRTEM/STEM-EDX-measurements. Phase-pure NiGa nanoparticles were tested in the

• /MS and NMR. Conversion and selectivity were determined by GC/MS [retention times in min: 1.67 (octane), 1.75 ((Z)-4-octene), 1.78 ((E)-4-octene), 1.86 ((Z)-3-octene), 1.94 ((E)-3-octene), 2.29 (4-octyne), Shimadzu GC2014, column Ultra2, crosslinked 5% PhMe silicone, 25 m × 0.2 mm × 11 mm]. Top: HRTEM

The impact of crystal size and temperature on the adsorption-induced flexibility of the Zr-based metal–organic framework DUT-98

• Simon Krause,
• Volodymyr Bon,
• Hongchu Du,
• Rafal E. Dunin-Borkowski,
• Ulrich Stoeck,
• Irena Senkovska and
• Stefan Kaskel

Beilstein J. Nanotechnol. 2019, 10, 1737–1744, doi:10.3762/bjnano.10.169

• the anisotropy of the crystals and the large peak broadening, leading to an overlap of the reflections of the two phases. To further analyze the nature of the phase mixture, we performed high-resolution transmission electron microscopy (HRTEM) analysis on DUT-98(4). HRTEM was previously applied for

• (Supporting Information File 1, Figure S9). Interestingly, DUT-98(Hf) showed enhanced stability towards the electron beam allowing for detailed microscopic analysis of the nanocrystals and their structure. HRTEM analysis shows uniform pore channels along the rod-shaped nanocrystals with a spacing of the Hf

• Information File 1, Figure S10) compared to DUT-98(3), which further supports the observations made by PXRD and HRTEM. In fact, neither of the isotherms of DUT-98(Hf) nor DUT-98(2)–(4) show any indication of adsorption-induced flexible behavior, evident by steps or hysteresis in the isotherm. Thus, nitrogen

TiO₂/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries

• Ning Liu,
• Lu Wang,
• Taizhe Tan,
• Yan Zhao and
• Yongguang Zhang

Beilstein J. Nanotechnol. 2019, 10, 1726–1736, doi:10.3762/bjnano.10.168

• nanoporous TiO2 has been completely wrapped by wrinkled GO nanosheets (Figure 3d and 3e). As displayed in the high-resolution TEM (HRTEM) images (Figure 3f and 3g), the TiO2/GO composite reveals no clear lattice fringe for TiO2, indicating poor crystallinity. It is clear that the GO sheets have a flake-like

• of the TiO2/GO composite. (a) SEM image, (b) element maps and (c) TEM image of the as-prepared nanoporous TiO2 particles. (d) SEM image, (e) TEM image, (f, g) HRTEM images and (h–k) EDS mapping of the as-prepared TiO2/GO composite. Surface SEM images of (a) a pristine separator, (b) a TiO2/GO-coated

Direct observation of oxygen-vacancy formation and structural changes in Bi₂WO₆ nanoflakes induced by electron irradiation

• Hong-long Shi,
• Bin Zou,
• Zi-an Li,
• Min-ting Luo and
• Wen-zhong Wang

Beilstein J. Nanotechnol. 2019, 10, 1434–1442, doi:10.3762/bjnano.10.141

• of high-resolution TEM (HRTEM) imaging and electron diffraction experiments was performed to investigate the electron-induced defects in the Bi2WO6 nanoflakes. Our results reveal that Bi2WO6 nanoflakes can be decomposed into Bi precipitates and WO3 nanosheets after the generation of oxygen vacancies

• during the electron-beam irradiation process. The formation mechanisms of Bi/O defects are discussed in detail by combining the HRTEM imaging of defects and the calculation of the electrostatic site potentials of Bi2WO6. Results and Discussion Structural features and photodegradation The Bi2WO6 sample is

• that the Al peak located at 1.5 keV is from the sample holder. Figure 1b shows a low-magnification TEM image of the specimen, illustrating that these aggregates are composed of crystalline nanoflakes with sizes of 50–100 nm. The thickness of these nanoflakes is 6–14 nm, as determined by HRTEM

Selective gas detection using Mn₃O₄/WO₃ composites as a sensing layer

• Yongjiao Sun,
• Zhichao Yu,
• Wenda Wang,
• Pengwei Li,
• Gang Li,
• Wendong Zhang,
• Lin Chen,
• Serge Zhuivkov and
• Jie Hu

Beilstein J. Nanotechnol. 2019, 10, 1423–1433, doi:10.3762/bjnano.10.140

• of pure WO3 and Mn3O4/WO3 composites, and (b) the magnified region of the (402) peaks. SEM images of (a) WO3, (b) 1 atom %, (c) 3 atom % and (d) 5 atom % Mn3O4/WO3 composites. (a) TEM image and (b,c) HRTEM image of 5 atom % Mn3O4/WO3 composites. N2 adsorption–desorption isotherms of pure WO3 and

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

• ) of Au/CBO also confirm this result. Also, TEM and HRTEM images were recorded. As shown in Figure 4a, Au NPs with a size of 20–30 nm were found to be uniformly dispersed on the surface of the CBO microrods. The HRTEM image of Au/CBO sample, presented in Figure 4b, provided detailed information about

• /CBO composite. (a) TEM and (b) HRTEM images of the 2.5 wt % Au/CBO composite. XPS high-resolution spectra of the 2.5 wt % Au/CBO composite: (a) Au 4f; (b) Cu 2p; (c) Bi 4f and (d) O 1s. (a) TC degradation dynamics under visible-light irradiation. (b) Changes of the characteristic absorption of TC when

Alloyed Pt₃M (M = Co, Ni) nanoparticles supported on S- and N-doped carbon nanotubes for the oxygen reduction reaction

• Stéphane Louisia,
• Yohann R. J. Thomas,
• Pierre Lecante,
• Marie Heitzmann,
• M. Rosa Axet,
• Pierre-André Jacques and
• Philippe Serp

Beilstein J. Nanotechnol. 2019, 10, 1251–1269, doi:10.3762/bjnano.10.125

• materials. High resolution transmission electron microscopy (HRTEM) analysis shows a remarkable difference between the carbon structures synthetized (Figure 1). Very regular structures were obtained for the CNT sample (Figure 1a), while the N-CNT sample presented a “bamboo-like” structure typically found in

• N-doped CNTs (Figure 1b) [39], and the structure of the S-doped CNTs presents some alterations (bulbous segments, Figure 1c), which are different than those observed for the N-CNTs (bamboo structure). The N-CNTsHT show similar structure to the HRTEM observations (Figure 1d). Low magnification TEM

• the structure of these catalysts, additional characterization was carried out on the Pt3Co/N-CNT and Pt3Ni/N-CNTHT samples, which presented the best performance in the ORR. We first used HRTEM to analyze the product resulting from the first step of the catalyst preparation, i.e., the reduction of the

Green fabrication of lanthanide-doped hydroxide-based phosphors: Y(OH)₃:Eu³⁺ nanoparticles for white light generation

• Tugrul Guner,
• Anilcan Kus,
• Mehmet Ozcan,
• Aziz Genc,
• Hasan Sahin and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 1200–1210, doi:10.3762/bjnano.10.119

• diffraction (XRD; X’Pert Pro, Philips, Eindhoven, The Netherlands), while their morphology was characterized by scanning electron microscopy (SEM; Quanta 250, FEI, Hillsboro, OR, USA). High-resolution transmission electron microscopy (HRTEM) micrographs were obtained using an FEI Tecnai F20 field emission gun

Synthesis and characterization of quaternary La(Sr)S–TaS₂ misfit-layered nanotubes

• Marco Serra,
• Erumpukuthickal Ashokkumar Anumol,
• Dalit Stolovas,
• Iddo Pinkas,
• Ernesto Joselevich,
• Reshef Tenne,
• Andrey Enyashin and
• Francis Leonard Deepak

Beilstein J. Nanotechnol. 2019, 10, 1112–1124, doi:10.3762/bjnano.10.111

• axis. From the HRTEM images, a periodicity of ≈1.16 nm along the c-axis was concluded (Figure 5a). The analysis of HAADF-STEM images of a SrxLa1−xS–TaS2 nanotube from a sample containing 20 atom % Sr substitution shows that nanotubes with different folding vectors are present. For example, in Figure 6a

• was obtained in the analyzed nanotubes. The S map shows more or less uniform distribution in the nanotube. HRTEM imaging and SAED analysis were carried out on a SrxLa1−xS–TaS2 sample with 60 atom % Sr in the precursor (40 atom % La). The nanotube was found to have an interlayer periodicity of ≈1.18 nm

• the lattice. EDX quantification indicated that the La/Sr ratio is in the range 38–61 (La):62–39 (Sr) in the analyzed nanotubes. This analysis shows that the Sr atoms can substitute for the La atoms up to about 60 atom %. The HRTEM/EDX analysis does not indicate any Sr substitution into the TaS2

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

• sequentially. High-resolution transmission electron microscopy (HRTEM) shows that the four fractions are well-dispersed spherical particles of diameter 3.0 ± 0.6, 2.3 ± 0.5, 1.7 ± 0.4, and 1.2 ± 0.4 nm. Proton nuclear magnetic resonance spectroscopy suggests that disulfide, excess ligands and gold(I) complexes

• supernatant was dried with N2 which was designated as the residue. Characterization of the structure and optical properties of gold nanoclusters High-resolution transmission electron microscopy (HRTEM) measurements were recorded on a JEOL 2010 transmission electron microscope (Tokyo, Japan) operating at an

• spectrophotometer (Varian, Palo Alto, CA, USA). The PL properties of the samples were acquired on a QM4 spectrofluorometer (Photon Technology International, Lawrenceville, NJ, USA). Results and Discussion TEM characterization Figure 2A shows an HRTEM image of the crude AuNC product. It is clearly observed that the

Synthesis of MnO₂–CuO–Fe₂O₃/CNTs catalysts: low-temperature SCR activity and formation mechanism

• Yanbing Zhang,
• Lihua Liu,
• Yingzan Chen,
• Xianglong Cheng,
• Chengjian Song,
• Mingjie Ding and
• Haipeng Zhao

Beilstein J. Nanotechnol. 2019, 10, 848–855, doi:10.3762/bjnano.10.85

• the acid-treated CNTs and the catalysts were investigated by TEM and HRTEM (Figure 3). The acid-treated CNTs have a smooth external surface (Figure 3a) that becomes coarse after being loaded with active metal oxide (Figure 3b). Additionally, the HRTEM images show the presence of catalysts nanoflakes

• , also verifying the generation of metal oxide catalysts on the CNT surface. The EDX spectrum (Figure 3d) shows signals of Mn, Cu, Fe, O and C. Clear lattice fringes of the metal oxides cannot be observed in the HRTEM images, indicating the generation of amorphous materials, which is consistent with the

• catalysts: (a) acid-treated CNTs, (b) 1% MnO2–CuO–Fe2O3/CNTs, (c) 2% MnO2–CuO–Fe2O3/CNTs, (d) 4% MnO2–CuO–Fe2O3/CNTs, (e) 6% MnO2–CuO–Fe2O3/CNTs, and (f) Mn–Cu–FeOx/CNTs-IWIM. TEM and HRTEM images, as well as EDX spectrum of CNT-based samples: (a) CNTs, (b–d) 4% MnO2–CuO–Fe2O3/CNTs. XPS results of the as

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

• , US) and then dried at ambient temperature for 24 h. High-resolution transmission electron microscopy (HRTEM) images were acquired using a high-resolution transmission electron microscope (JEM 2100, JEOL Inc., Peabody, MA, US) equipped with a 4k × 4k CCD camera (Gatan, Pleasanton, CA, US). Samples

• Figure 2a and Figure 2c; cf. Figure 2d and Figure 2f), is that WS2-NT-CM is significantly less aggregated in aqueous dispersion compared to WS2-NT. Here, too, the electrostatic repulsion provided by CAN-mag is probably the reason. In the HRTEM image of WS2-NT-CM (Figure 2e), the crystalline nanoparticles

• of maghemite are easily observed, including visible lattice fringes (marked in yellow). TEM images of WS2-NT-CM-PEI (Figure 2g) and WS2-NT-CM-PAA (Figure 2i) show that the dark CAN-mag composite is surrounded by a lighter substance, namely the organic polymer (PEI or PAA). A closer look by HRTEM into

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

• Figure 1a, the diffraction pattern clearly indicates that orthorhombic CsPbBr3 PNCs (PDF card #18-0364) were formed. No other phases were observed, suggesting the high purity of the samples. The TEM image shown in Figure 1b demonstrates that the CsPbBr3 PNCs have a regular square morphology. HRTEM was

• nanoparticles that have been reported before [23][35][36]. The HRTEM image shown in Figure 4d demonstrates an interplanar spacing of 0.39 nm, corresponding to the (300) crystal plane of bulk Cs4PbBr6, which is also consistent with the PDF card #73-2478. The size of the Cs4PbBr6 PNCs is defined here as the

• , JEM-2100F, JEOL, Japan) with an accelerating voltage of 100 kV. High-resolution TEM (HRTEM) was carried out on a JEOL JEM-2100F instrument operating at 200 kV. The crystal phases of the products were measured using an X-ray diffractometer (XRD, D8-Advance, Bruker, Germany) with a Cu Kα radiation