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16 protocols using x max50

1

Elemental Mapping of Materials by SEM-EDX

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In the study, SEM-energy dispersive X-ray spectroscopy (EDX) elemental mapping was performed for the determination of selected elements, such as C, O, Au, Ag and Cu, processed by C Kα1 and 2; O Kα1, Ag Lα1, Cu Lα1 and 2, and Au Mα1 edges, respectively. As a measuring device MIRA 2 SEM (TESCAN Ltd., Brno, Czech Republic) coupled with an EDX detector X-MAX 50 (Oxford instruments plc, Abingdon, UK) was used and the images were evaluated by software AZtec (Oxford Instruments, Abingdon, UK). An external detector SE (Everhart-Thornley, TESCAN Ltd. Brno, Czech Republic) was selected for image processing with an accelerating voltage 15 kV. EDX mappings of selected elements, such as C, O, Au, Ag and Cu were processed using C Kα1 and 2; O Kα1, Ag Lα1, Cu Lα1 and 2, and Au Mα1 edges, respectively. Parameters of measurements were the following: working distance 15.4 mm, input energy 20,000 cts, output energy 16,000 cts with fluctuated dead time around 18–20%. Each analysis took place in 20 min.
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2

Characterization of Mg(OH)2 Nanoparticles

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The X-ray diffraction (XRD, Rigaku D/max-2500/PC) was used to analyze the crystal structure and purity of the Mg(OH)2 NPs using Cu Kα radiation (λ = 0.15418) at 25 mA and 40 kV, which was acquired from 5° to 90° with a step size of 0.05°/s. A scanning electron microscope (SEM, NOVA Nano SEM 450) was operated at the accelerating voltage of 3–20 kV to analyze the surface morphology of the Mg(OH)2 NPs. In addition, the conductive films with gold were coated on the Mg(OH)2 NP surfaces for the SEM test. The elemental composition of the sample was tested by the scanning electron microscope (EDS, X-Max50, Oxford Instruments, Abingdon, UK) and X-ray photoelectron spectroscopy (XPS, Thermo ESCALAB 250Xi, Al K-Alpha) on a VG MultiLab 2000 X-ray photoelectron spectrometer (Thermo Electron Corporation, Waltham, MA, USA) using Al-Kα (hλ = 1486.6 eV) radiation as the excitation source, and the spectra were calibrated by the C 1s peak (284.8 eV).
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3

Characterization of Laser-Ablated Surfaces

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The optical images of laser ablated surfaces were obtained by a 3D digital video microscope (Leica DVM2000). The surface morphologies were observed using a field-emission scanning electron microscope (TESCAN VEGA3), and the corresponding element distributions were determined by an energy-dispersive X-ray spectroscopy system (Oxford Instruments X-Max 50). The contact angles and sliding angles were measured by an optical contact angle meter (POWEREACH JC2000D2A). The mechanical durability and drag reduction performance were evaluated by a self-designed ball-disk rotor gyroscope test system.
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4

Microscopic Analysis of TiO2/CNC Composites

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Scanning electron microscopy (SEM) experiment was performed by a Crossbeam 340 instrument (Carl Zeiss Microscopy, Thornwood, NY) equipped with the energy dispersive spectroscopy (EDS, X-Max 50, Oxford Instruments, Concord, MA) capability. In this measurement, the TiO2/CNC powder sample was loaded onto the sample holder using a piece of carbon tape. SEM images were obtained using the SE detector at 3 kV of EHT (extra high tension), where elemental mappings were collected at 20 kV of EHT. Transmission electron microscopy (TEM) experiment was carried out by a JEOL 1400 instrument. In the typical TEM sample preparation, 2 μL of TiO2/CNC suspension at 0.01 wt% was deposited on a 300-mesh copper grid with carbon film coating. For the cryo TEM measurement (using a FEI Vitrobot instrument), a 0.1 wt% TiO2/CNC suspension was loaded onto a 300-mesh copper grid with lacey carbon. The TEM images were acquired using a Gatan 626 single tilt liquid nitrogen cryo-transfer holder.
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5

Cicada Ovipositor Elemental Composition

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The elemental composition of the cuticle of cicada ovipositors was acquired using energy dispersive x-ray spectroscopy (EDS) (X-Max50, Oxford Instruments). The elemental composition was determined by analyzing a defined region of the ovipositor with EDS for 10 minutes (20 kV, spot size 61, magnifications >200x). The percentage weight for each detected element (determined by Aztec software) was recorded. We analyzed ten dorsal and seven ventral locations along the length of each ovipositor (Supplementary Fig. S2). On the dorsum, six locations were analyzed in the rasping region, including three measurements near the distal tip (one measurement on a GIX, two measurements on a GVIII), and three measurements near the middle (one on a GIX, two on a GVIII). In addition, two measurements at the middle of the total ovipositor length (one on a GIX, one on a GVIII) and two measurements at the base of the ovipositor (one on GIX, one on GVIII) were recorded. On the ventral side of the ovipositor we measured two locations on a GIX in the rasping region, one at the distal tip and the other near the middle. The GVIII was measured at five locations, including the distal tip, the middle of the rasping region, the ventral lobe (=tongue-like slice)27 (link) (near where the eggs exit the ovipositor), the middle of the ovipositor length, and the base of the ovipositor (Supplementary Fig. S2).
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6

Synthesis and Characterization of UPBNPs-MCSNs

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The synthesis and characterization of MCSNs and UPBNPs have been mentioned in our previous studies.7 (link),13 (link) UPBNPs and MCSNs were added to deionized water at a mass ratio of 1:50. After thoroughly mixed, the mixture was freeze-dried to obtain UPBNPs-MCSNs.
The UPBNPs-MCSNs were characterized by scanning electron microscopy (SEM, JSM-7900F, JEOL, Tokyo, Japan), transmission electron microscopy (TEM, Talos F200X, Thermo Fisher Scientific, Waltham, MA, USA) and energy dispersive spectrometry (EDS, X-Max50, Oxford Instruments, Abingdon, UK). Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) methods (ASAP 2640, Micromeritics, Norcross, GA, USA) were used to investigate the surface area and pore distribution of MCSNs and UPBNPs-MCSNs. Through X-ray photoelectron spectroscopy (XPS, K-Alpha, Thermo Fisher Scientific, Waltham, MA, USA), Fourier transformed infrared spectroscopy (FT-IR, Nicolet iS10, Thermo Fisher Scientific, Waltham, MA, USA) and thermogravimetric analysis / differential thermal analysis (TGA / DTA, DTG-60H, Shimadzu, Japan) to evaluate the combination between MCSNs and UPBNPs, and thermal stability. The pH value of UPBNPs-MCSNs in deionized water was measured by a pH meter (SIN-PH100, Sinomeasure, China), and Iron Assay Kit (Sigma-Aldrich, St. Louis, MO, USA) measured the iron ion release curve.
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7

Membrane Microstructure Characterization

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The plan-view and cross-section microstructure of the employed membrane film were characterized after the permeation experiments by scanning electron microscopy (SEM) using secondary electrons (SE) or backscattered electrons (BSE), with an FEI 650 NOVA NanoSEM instrument (FEI Company, Hillsboro, OR, USA) combined with energy dispersive spectroscopy (EDS) (X-MAX50, Oxford Instruments, Abingdon, Oxfordshire, UK).
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8

SEM and EDX Analysis of Ceramic Powders

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SEM observations of the powder samples as well as TCP, 0.1SrTCP, and 0.5SrTCP ceramics were performed using a Tescan VEGA3 (Tescan, Czech) scanning electron microscope equipped with an Oxford Instruments X-Max 50 silicon drift energy-dispersive X-ray spectrometry (EDXs) system with AZtec (Oxford Instruments NanoAnalysis, France) and INCA software (JANA, Inc., Universal City, TX, USA) (Base Product package). Samples were coated with a thin layer of carbon for the SEM examinations. SEM images were acquired using secondary electron and backscattered electron imaging techniques. The EDX analysis results were based on the CaK, SrK, and PK edge lines. The oxygen content was not quantified by EDX.
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9

Laser-Induced Surface Characterization

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Surface properties were characterized in order to study surface morphology and chemistry. An optical 3D surface measurement system by Alicona Imagining GmbH (InfiniteFocus G5) was employed to analyze the depth, roughness and profile of the laser fabricated patterns. Laser confocal microscopy Keyence VK-X1000 (KEYENCE CORPORATION, Osaka, Japan) was used for measuring the specific parameters of surface roughness.
The changes in the wetting characteristics of laser treated and post-process samples were analyzed through measurement of the static contact angle using the sessile drop method with a video-based static contact angle computing device (OCA 15 from Data Physics Instruments). Droplets of distilled deionized water were applied in a volume of 8 μL. The contact angle values are the averages of three measurements. The total measurement time was 55 days. After this period, the samples were cleaned ultrasonically for 15 min in deionized water. Then, the samples were dried, and the static contact angles were measured again.
A Zeiss field-emission scanning electron microscope (FESEM; ULTRA PLUS, Jena, Germany) equipped with an energy-dispersive spectrometer from Oxford Instruments (EDS; X-Max 50) was used to detect changes in surface chemistry. In addition, Raman spectroscopy was employed to identify the form of titanium oxide.
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10

Preparation and Characterization of Embedded Samples

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Cross-section SEM images (TESCAN MAIA3, Triglav) of the substrates embedded in slow-curing transparent epoxy resin (Epofix Kit, Struers) were taken to perform the EDS analyses.
Initially all samples were attached into an aluminum spring and the resin deposited into a Teflon container using a vacuum chamber. The spring was removed by pulling it, and the samples polished. The embedded samples were polished following a protocol with a sequence of sand papers (#320, #500, #1200, #4000, Largo 6 μm, Dur 3 μm and Nap 1 μm, Struers). We ran the equipment for ≈4 min using water for the coarser grades (#320 and #500) and for ≈2 min for the finer ones using DP lubricant (TegraPol-21 equipped with a Tegra Doser-5, Struers).
The embedded samples attached to the aluminum stub are illustrated in Fig. 1. The sample was coated with 5 nm chromium and accessed right after to avoid the oxidation of the coating. Images were accessed using backscattered electron detector (BSE) in analysis mode at 20 keV. The EDS detector (Oxford Instruments accessory X-Max 50) was coupled with the SEM equipment, and the Aztec software was used for data acquisition and analyses.
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