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Search for "bright-field" in Full Text gives 130 result(s) in Beilstein Journal of Nanotechnology.

High-temperature magnetism and microstructure of a semiconducting ferromagnetic (GaSb)1−x(MnSb)x alloy

  • Leonid N. Oveshnikov,
  • Elena I. Nekhaeva,
  • Alexey V. Kochura,
  • Alexander B. Davydov,
  • Mikhail A. Shakhov,
  • Sergey F. Marenkin,
  • Oleg A. Novodvorskii,
  • Alexander P. Kuzmenko,
  • Alexander L. Vasiliev,
  • Boris A. Aronzon and
  • Erkki Lahderanta

Beilstein J. Nanotechnol. 2018, 9, 2457–2465, doi:10.3762/bjnano.9.230

Graphical Abstract
  • variations. Contrast changes in the lateral direction are due to diffraction contrast arising from the columnar film microstructure, which was distinctly observed in bright-field TEM (Figure 4a) and in high-resolution bright-field TEM (HRTEM) images (Figure 4b), and even affects the HAADF TEM image (not
  • and Hall slope ΔRH normalized by the corresponding values at T = 320 K. TEM images of the film cross section after annealing (sample GM3): (a) bright-field image, (b) HRTEM image. (a,d) HRTEM images of sample areas. (b,e) Corresponding two-dimensional Fourier spectra. (c,f) Calculated electronograms
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Published 14 Sep 2018

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

Graphical Abstract
  • flawless Co3O4/FTO interface, which is desirable for efficient transport of photogenerated charges. Moreover, the TEM image shows the nanocrystalline nature of the porous Co3O4 due to the Kirkendall diffusion that drove the thermal oxidation of Co nanoparticles on the FTO layer. The bright-field
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Published 12 Sep 2018

Droplet-based synthesis of homogeneous magnetic iron oxide nanoparticles

  • Christian D. Ahrberg,
  • Ji Wook Choi and
  • Bong Geun Chung

Beilstein J. Nanotechnol. 2018, 9, 2413–2420, doi:10.3762/bjnano.9.226

Graphical Abstract
  • of hot-melt adhesive. The remaining tubing after the junction was submerged in a water bath and the end was placed into a vial filled with water for sample collection. For droplet experiments the formation of droplets was recorded using a bright-field microscope (IX37, Olympus, Japan). Droplet
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Published 10 Sep 2018

High-throughput synthesis of modified Fresnel zone plate arrays via ion beam lithography

  • Kahraman Keskinbora,
  • Umut Tunca Sanli,
  • Margarita Baluktsian,
  • Corinne Grévent,
  • Markus Weigand and
  • Gisela Schütz

Beilstein J. Nanotechnol. 2018, 9, 2049–2056, doi:10.3762/bjnano.9.194

Graphical Abstract
  • including the stage travel and calculation overhead. The cross-shaped reflected intensity pattern seen in all the FZPs in Figure 4b is a polarized bright-field optical microscope image and a sign of overall high quality [46]. The cross shape rotates as the polarization is varied between 0° and 90°. The dark
  • ) Bright-field optical microscopy image of the array under polarized light. The familiar cross-shaped reflected light from the FZPs is an indicator of high quality. c) Dark-field optical image without the polarizer. The blue-shifted reflected intensity from inner zones to outer zones is attributed to
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Published 25 Jul 2018

Defect formation in multiwalled carbon nanotubes under low-energy He and Ne ion irradiation

  • Santhana Eswara,
  • Jean-Nicolas Audinot,
  • Brahime El Adib,
  • Maël Guennou,
  • Tom Wirtz and
  • Patrick Philipp

Beilstein J. Nanotechnol. 2018, 9, 1951–1963, doi:10.3762/bjnano.9.186

Graphical Abstract
  • secondary ion mass spectrometry experiments as described elsewhere, which leads to a modified octagon and pole-pieces [59]. The bright-field (BF) TEM images were recorded in the He+ and Ne+ craters using Gatan on-axis CCD camera with 2k × 2k pixel array (Figure 8). Raman spectroscopy was done prior to TEM
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Published 09 Jul 2018

Synthesis of hafnium nanoparticles and hafnium nanoparticle films by gas condensation and energetic deposition

  • Irini Michelakaki,
  • Nikos Boukos,
  • Dimitrios A. Dragatogiannis,
  • Spyros Stathopoulos,
  • Costas A. Charitidis and
  • Dimitris Tsoukalas

Beilstein J. Nanotechnol. 2018, 9, 1868–1880, doi:10.3762/bjnano.9.179

Graphical Abstract
  • truncated biprism through volume rendering (Figure 4a). Volume rendering techniques display 2D projections of a 3D model, by simulating the propagation of light rays into a semitransparent materials volume and creating the illusion of depth. Thus, similar to bright-field TEM images thin regions appear
  • composed of orthorhombic HfO2 nanocrystallites indicated by arrows exhibiting lattice fringes of d = 0.295 nm corresponding to (101) HfO2 embedded in an amorphous layer. X-ray pattern of hafnium NPs on Si substrate synthesized for different aggregation-zone lengths D = 50, 75 and 100 nm. a) Bright-field
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Published 27 Jun 2018

Toward the use of CVD-grown MoS2 nanosheets as field-emission source

  • Geetanjali Deokar,
  • Nitul S. Rajput,
  • Junjie Li,
  • Francis Leonard Deepak,
  • Wei Ou-Yang,
  • Nicolas Reckinger,
  • Carla Bittencourt,
  • Jean-Francois Colomer and
  • Mustapha Jouiad

Beilstein J. Nanotechnol. 2018, 9, 1686–1694, doi:10.3762/bjnano.9.160

Graphical Abstract
  • presented. A bright -field TEM image (Figure 3a) indicates the presence of NSs over the entire area. The as-grown NSs, densely packed with very high crystalline quality, can be seen. The fast Fourier transform (FFT) image of Figure 3a is given in Figure 3c. The ring pattern indicates that the NSs are made
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Published 07 Jun 2018

Magnetic characterization of cobalt nanowires and square nanorings fabricated by focused electron beam induced deposition

  • Federico Venturi,
  • Gian Carlo Gazzadi,
  • Amir H. Tavabi,
  • Alberto Rota,
  • Rafal E. Dunin-Borkowski and
  • Stefano Frabboni

Beilstein J. Nanotechnol. 2018, 9, 1040–1049, doi:10.3762/bjnano.9.97

Graphical Abstract
  • values of the NWs calculated from Δφ, showing saturation for longer deposition times and higher values for the lower deposition energy. (a) In-focus bright-field TEM image of a Co NW. (b) L-TEM underfocus image of the NW, exhibiting a kink at the right end due to a magnetic domain wall. The kink moves
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Published 03 Apr 2018

Single-crystalline FeCo nanoparticle-filled carbon nanotubes: synthesis, structural characterization and magnetic properties

  • Rasha Ghunaim,
  • Maik Scholz,
  • Christine Damm,
  • Bernd Rellinghaus,
  • Rüdiger Klingeler,
  • Bernd Büchner,
  • Michael Mertig and
  • Silke Hampel

Beilstein J. Nanotechnol. 2018, 9, 1024–1034, doi:10.3762/bjnano.9.95

Graphical Abstract
  • ) first (solution) and b) second filling approach. Inset: a MNP, attached to the outer surface of a CNT, and covered with a carbon shell. TEM bright field images for the a) as-prepared and b) annealed samples of Fe50Co50@CNT prepared by the second filling approach. c) HRTEM images for the as-prepared
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Published 29 Mar 2018

Towards 3D crystal orientation reconstruction using automated crystal orientation mapping transmission electron microscopy (ACOM-TEM)

  • Aaron Kobler and
  • Christian Kübel

Beilstein J. Nanotechnol. 2018, 9, 602–607, doi:10.3762/bjnano.9.56

Graphical Abstract
  • for all markers of Figure 1f setting the total thickness dtot to 1 to receive a relative ratio. Comparing the intensities of the diffracted beams with the primary beam, an absolute thickness could be calculated. Figure 1f is a virtual bright field (VBF) image reconstructed by placing a virtual
  • orientation map belonging to the same area and processed with two filter approaches (color code: crystal orientation). (f) Virtual bright field map that highlights one grain with two twin crystallites and the evaluated positions. The reconstructed cross section (based on the evaluation in (g)) is overlaid. (g
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Published 15 Feb 2018

Gas-assisted silver deposition with a focused electron beam

  • Luisa Berger,
  • Katarzyna Madajska,
  • Iwona B. Szymanska,
  • Katja Höflich,
  • Mikhail N. Polyakov,
  • Jakub Jurczyk,
  • Carlos Guerra-Nuñez and
  • Ivo Utke

Beilstein J. Nanotechnol. 2018, 9, 224–232, doi:10.3762/bjnano.9.24

Graphical Abstract
  • evidence that the crystals seen in the scanning electron micrographs (Figure 1) are made of silver. Figure 3a depicts a line written on a carbon membrane of a TEM grid in our SEM with 25 kV and 0.5 nA and an electron dose of 0.79 pC/µm. Figure 3b displays a bright field scanning transmission electron
  • micrograph of the line deposit obtained with 25 kV, 0.5 nA and a line dose of 0.79 pC/µm. The bright surrounding box is the gold TEM grid. (b) Bright field scanning transmission electron micrograph of the line's center. Red arrows indicate twins in particles. (c) High resolution TEM image of two
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Published 19 Jan 2018

Bombyx mori silk/titania/gold hybrid materials for photocatalytic water splitting: combining renewable raw materials with clean fuels

  • Stefanie Krüger,
  • Michael Schwarze,
  • Otto Baumann,
  • Christina Günter,
  • Michael Bruns,
  • Christian Kübel,
  • Dorothée Vinga Szabó,
  • Rafael Meinusch,
  • Verónica de Zea Bermudez and
  • Andreas Taubert

Beilstein J. Nanotechnol. 2018, 9, 187–204, doi:10.3762/bjnano.9.21

Graphical Abstract
  • with optical microscopy. Moreover, the diameter of the AuNPs in the TS_Au5.0 materials is mainly between 7–13 nm, but smaller Au particles are also present. Furthermore, bright field TEM images of TS_Au5.0 show a homogeneous AuNP distribution on the TNP. Dark field STEM images of the HM show a better
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Published 17 Jan 2018

Co-reductive fabrication of carbon nanodots with high quantum yield for bioimaging of bacteria

  • Jiajun Wang,
  • Xia Liu,
  • Gesmi Milcovich,
  • Tzu-Yu Chen,
  • Edel Durack,
  • Sarah Mallen,
  • Yongming Ruan,
  • Xuexiang Weng and
  • Sarah P. Hudson

Beilstein J. Nanotechnol. 2018, 9, 137–145, doi:10.3762/bjnano.9.16

Graphical Abstract
  • Xag after incubation with Sb in the concentration range 2.5–20 µg mL−1 for 72 h. Confocal images of Xag. (A) Bright field without Sb, (B) fluorescence mode without Sb and (C) merged channel image with 5.0 μg mL−1 of Sb incubated for 3 h at 37 °C. Fluorescent carbon nanodots with different quantum
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Published 12 Jan 2018

Involvement of two uptake mechanisms of gold and iron oxide nanoparticles in a co-exposure scenario using mouse macrophages

  • Dimitri Vanhecke,
  • Dagmar A. Kuhn,
  • Dorleta Jimenez de Aberasturi,
  • Sandor Balog,
  • Ana Milosevic,
  • Dominic Urban,
  • Diana Peckys,
  • Niels de Jonge,
  • Wolfgang J. Parak,
  • Alke Petri-Fink and
  • Barbara Rothen-Rutishauser

Beilstein J. Nanotechnol. 2017, 8, 2396–2409, doi:10.3762/bjnano.8.239

Graphical Abstract
  • nm laser lines. The analysis was performed using a 63×/NA 1.4 immersion oil lens. Image processing routines Analytical data were retrieved from the laser scanning micrographs (stacks of bright field and fluorescence channels) by means of dedicated ImageJ macro scripts (see Supporting Information File
  •  1). In short, the raw bright field image was used to retrieve the outline of the cell using a combination of variance and median filters. This outline was used as a mask on the fluorescence images (Figure S17, Supporting Information File 1). Individual pixel information was retrieved by a scanning
  • routine over the dataset, including only elements that were marked as belonging to the cell by the bright field mask. The data for the Pearson’s colocalisation coefficient, notably the fluorescence intensity value at each pixel position xi and yi, was obtained in a similar way using with and
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Published 14 Nov 2017

Magnetic properties of optimized cobalt nanospheres grown by focused electron beam induced deposition (FEBID) on cantilever tips

  • Soraya Sangiao,
  • César Magén,
  • Darius Mofakhami,
  • Grégoire de Loubens and
  • José María De Teresa

Beilstein J. Nanotechnol. 2017, 8, 2106–2115, doi:10.3762/bjnano.8.210

Graphical Abstract
  • ). Figure 5a shows the bright field image of the Co nanosphere overlapped with the interference fringe pattern of the hologram, revealing a significant amount of contamination which did not disappear after standard Ar/O2 plasma cleaning procedures. Furthermore, the holograms before and after (not shown
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Published 09 Oct 2017

Carbon nano-onions as fluorescent on/off modulated nanoprobes for diagnostics

  • Stefania Lettieri,
  • Marta d’Amora,
  • Adalberto Camisasca,
  • Alberto Diaspro and
  • Silvia Giordani

Beilstein J. Nanotechnol. 2017, 8, 1878–1888, doi:10.3762/bjnano.8.188

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  • fluorescent dye (Hoechst 33232). Bright-field transmission images after fluo-CNO treatment confirmed that the HeLa cells were viable throughout all the experiments. From the fluorescence microscopy images (Figure 7), it was observed that cells treated with fluo-CNOs and maintained at a physiological pH (7.4
  • ) for 1 h exhibited no detectable red fluorescence signal (Figure 7A). Successively, when the cells were incubated with acidic PBS (at pH 4.5), a strong red fluorescence signal was clearly observed in the intracellular region (Figure 7B). The overlay of fluorescence and bright-field images showed that
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Published 07 Sep 2017

A biofunctionalizable ink platform composed of catechol-modified chitosan and reduced graphene oxide/platinum nanocomposite

  • Peter Sobolewski,
  • Agata Goszczyńska,
  • Małgorzata Aleksandrzak,
  • Karolina Urbaś,
  • Joanna Derkowska,
  • Agnieszka Bartoszewska,
  • Jacek Podolski,
  • Ewa Mijowska and
  • Mirosława El Fray

Beilstein J. Nanotechnol. 2017, 8, 1508–1514, doi:10.3762/bjnano.8.151

Graphical Abstract
  • naked eye or under bright-field microscopy. As a result, in order to examine the printed structures and check for possible “coffee ring” formation, we utilized dark-field microscopy. We observed homogenous stripes, consistent with the design and tip dimensions. Figure 2 shows a representative dark-field
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Published 24 Jul 2017

Atomic structure of Mg-based metallic glass investigated with neutron diffraction, reverse Monte Carlo modeling and electron microscopy

  • Rafał Babilas,
  • Dariusz Łukowiec and
  • Laszlo Temleitner

Beilstein J. Nanotechnol. 2017, 8, 1174–1182, doi:10.3762/bjnano.8.119

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  • observations conducted in high-resolution mode. Further analysis of the ordered areas formed in the specimen annealed at 473 K for 1 h was provided by using STEM mode. The STEM bright field image presents some areas with a crystalline structure that indicate the formation of a primarly crystallization phase
  • electron diffraction (SAED) pattern and details of the selected areas 1, 2, 3 (c,d,e) of a Mg65Cu20Y10Ni5 metallic glass after annealing at 473 K for 1 h. TEM images in (a) bright field and (b) dark field mode of a Mg65Cu20Y10Ni5 metallic glass sample after annealing at 473 K for 1 h. (a) HAADF-STEM image
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Published 31 May 2017

3D Nanoprinting via laser-assisted electron beam induced deposition: growth kinetics, enhanced purity, and electrical resistivity

  • Brett B. Lewis,
  • Robert Winkler,
  • Xiahan Sang,
  • Pushpa R. Pudasaini,
  • Michael G. Stanford,
  • Harald Plank,
  • Raymond R. Unocic,
  • Jason D. Fowlkes and
  • Philip D. Rack

Beilstein J. Nanotechnol. 2017, 8, 801–812, doi:10.3762/bjnano.8.83

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  • spectroscopy (EELS) were performed using a Nion UltraSTEM 100 which is equipped with aberration correction of the probe forming lens. Beam-induced damage and contamination were minimized by using an accelerating voltage of 60 kV and a 40 pA beam current. High angle annular dark field (HAADF) and bright field
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Published 07 Apr 2017

Ion beam profiling from the interaction with a freestanding 2D layer

  • Ivan Shorubalko,
  • Kyoungjun Choi,
  • Michael Stiefel and
  • Hyung Gyu Park

Beilstein J. Nanotechnol. 2017, 8, 682–687, doi:10.3762/bjnano.8.73

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  • , freestanding graphene membranes were exposed to a Ga+ focused ion beam. The smallest beam aperture gives a beam current value of 1.5 pA. A suspended graphene layer is then exposed in a single-pixel exposure mode. Figure 1a shows a STEM bright field (BF) image of seven pores milled into graphene with different
  • Pa helium pressure in the gun chamber, and a “spot” parameter between 1.8 and 2.5. SEM in the DualBeam device was used in STEM bright-field and dark-field mode (BF and DF) at 30 kV and 50 pA probe current for perforated graphene imaging. HIM at 30 kV, 0.5 pA beam current, 1 μs dwell time and 8–32
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Published 23 Mar 2017

Self-assembly of silicon nanowires studied by advanced transmission electron microscopy

  • Marta Agati,
  • Guillaume Amiard,
  • Vincent Le Borgne,
  • Paola Castrucci,
  • Richard Dolbec,
  • Maurizio De Crescenzi,
  • My Alì El Khakani and
  • Simona Boninelli

Beilstein J. Nanotechnol. 2017, 8, 440–445, doi:10.3762/bjnano.8.47

Graphical Abstract
  • bright field (BF) and dark field (DF) imaging are dominated by diffraction contrast. Thus in crystalline samples, the contrast changes abruptly as long as the beam axis intercepts the different crystalline zone axes. More recently, this issue has been overcome whereas the improvement of high angular
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Published 15 Feb 2017

Role of oxygen in wetting of copper nanoparticles on silicon surfaces at elevated temperature

  • Tapas Ghosh and
  • Biswarup Satpati

Beilstein J. Nanotechnol. 2017, 8, 425–433, doi:10.3762/bjnano.8.45

Graphical Abstract
  • -sectional bright field TEM images and (c),(d) STEM-HAADF images of as-deposited and annealed at 500 °C in oxygen ambient copper nanoparticles on silicon substrates, respectively. The elemental mapping of Cu (1 and 4), Si (2 and 5), and the composite thereof (3 and 6) collected from the orange rectangular
  • mm thick disk was cut from the tube and then mechanically thinned, dimpled, polished and finally ion-milled to make the sample electron transparent. Results and Discussion Copper deposited on silicon surfaces by the galvanic displacement reaction were extensively examined by TEM. The plan-view bright
  • field TEM image in Figure 1a and the STEM-HAADF image in Figure 1b show the deposited copper nanoparticles on a silicon substrate. The elemental composition is presented by the EDX mapping. Figure 1e and Figure 1f show the silicon (yellow) and copper (blue) elemental mapping, respectively, collected
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Published 13 Feb 2017

Performance of colloidal CdS sensitized solar cells with ZnO nanorods/nanoparticles

  • Anurag Roy,
  • Partha Pratim Das,
  • Mukta Tathavadekar,
  • Sumita Das and
  • Parukuttyamma Sujatha Devi

Beilstein J. Nanotechnol. 2017, 8, 210–221, doi:10.3762/bjnano.8.23

Graphical Abstract
  • crystallites was calculated to be ≈5.2 nm using the Scherrer equation. The bright field image of the synthesized powder indicated the finer and porous nature of the synthesized CdS nanoparticles (Figure 1b). The high resolution TEM (HRTEM) image shows the (111) and (311) crystalline planes with d values of
  • images of the sensitized films fabricated on ZnO-P and ZnO-R were monitored as depicted in Figure 4. The microstructural FESEM and TEM bright field images of the synthesized ZnO-R and ZnO-P are shown in Figure 4. The average nanoparticle size of the ZnO-P was calculated to be ≈12 nm from TEM. It is
  • ) Bright field transmission electron microscope image of the NPs. (c) HRTEM image highlighting the inter-planar distance of the cubic crystal planes (Inset: corresponding FFT pattern). (d) SAED pattern from image in (b). (a) and (b) show the FT-IR and Raman spectrum, respectively, of the synthesized CdS
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Published 23 Jan 2017

Influence of hydrofluoric acid treatment on electroless deposition of Au clusters

  • Rachela G. Milazzo,
  • Antonio M. Mio,
  • Giuseppe D’Arrigo,
  • Emanuele Smecca,
  • Alessandra Alberti,
  • Gabriele Fisichella,
  • Filippo Giannazzo,
  • Corrado Spinella and
  • Emanuele Rimini

Beilstein J. Nanotechnol. 2017, 8, 183–189, doi:10.3762/bjnano.8.19

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  • uniformly assemble on the Si substrate with elongated and wide structures of a few tens of nanometers long. After 4 min in DHF (Figure 2b), they arrange as small particles of spherical shape with a radius of less than 10 nm. Although the images were taken in bright field mode, a huge mass contrast between
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Published 18 Jan 2017

Structural and tribometric characterization of biomimetically inspired synthetic "insect adhesives"

  • Matthias W. Speidel,
  • Malte Kleemeier,
  • Andreas Hartwig,
  • Klaus Rischka,
  • Angelika Ellermann,
  • Rolf Daniels and
  • Oliver Betz

Beilstein J. Nanotechnol. 2017, 8, 45–63, doi:10.3762/bjnano.8.6

Graphical Abstract
  • adhesives principles. In total, we prepared 12 synthetic "insect" emulsions that were structurally characterized by microscopic techniques such as bright field, fluorescence and cryo-scanning electron microscopy (cryo-SEM) and laser diffraction particle size analysis. Parameters of particular interest were
  • structural parameters of each emulsion as revealed by bright field/fluorescence microscopy and cryo-scanning electron microscopy (SEM). In general, the droplet sizes determined by the various methods, such as bright field/fluorescence microscopy and cryo-SEM, were in good correspondence, except for the
  • larger size range of droplets as shown by the bright field/fluorescence microscopic images in comparison with those by cryo-SEM. The microscopic analyses revealed that the first generation provided a broader droplet size range with extremely large individual droplets leading to platykurtic kurtosis
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Published 06 Jan 2017
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