The current, transferred charges, and capacitor voltage were measured by an electrometer (Keithley 6514). The open-circuit voltage was measured using an electrostatic voltmeter (Trek 347). A step motor imposed the displacement with adjustable speed by a pulse drive circuit. A universal material testing machine that uses a stretch control mode with a stretch strain rate of 100% min was used to provide the required pressure. The simulation of the charge and pressure around the “Luck-Bag” vibration coreunit was based on the commercial software COMSOL. The morphologies and microstructures of the samples were observed using a Hitachi (SU8010) scanning electron microscopy. The water contact angle (CA) was measured by a DSA30 Drop Shape Analyzer (Kruss).
Dsa30 drop shape analyzer
Manufactured by Krüss
Sourced in Germany
The DSA30 Drop Shape Analyzer is a laboratory instrument designed for the measurement and analysis of surface tension, contact angle, and other related properties of liquids and solids. It provides precise and reliable data for various applications.
Automatically generated - may contain errors
Lab products found in correlation
Su8010, by Hitachi (1 mentions)
Jem 2100f microscope, by Malvern Panalytical (1 mentions)
Zetasizer nano zs90, by Malvern Panalytical (1 mentions)
Jsm 7100f, by JEOL (1 mentions)
Nicolet is10, by Thermo Fisher Scientific (1 mentions)
Surpass 3, by Anton Paar (1 mentions)
Spm 9700, by Shimadzu (1 mentions)
6 protocols using dsa30 drop shape analyzer
1
Characterization of Vibration Core Unit
2
Determining Surface Wettability of 3D Printed Vaginal Rings
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Contact angle measurements with the sessile drop method were performed on a DSA 30 Drop Shape Analyzer (Krüss GmbH, Hamburg, Germany) at room temperature. Drops of deionized water (5 µL) were deposited on the upper surface of the 3D printed vaginal ring (before and after the dissolution test) by an automatic dosing system. The diameter of the used needle was 0.5 mm. The contact angles were automatically calculated by Young–Laplace equation fitting on the imaged drop shape. The average contact angles were calculated from 16 drops measurements (n = 16) [21 (link)].
3
Characterization of MXenes Using XRD, SEM, TEM, and Zeta Potential
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X-ray diffraction (XRD) data was collected by a D4 ENDEAVOR X-ray diffractometer (Bruker, Germany) equipped with CuKα radiation (λ = 0.154 nm). The morphology of the MXenes was observed with a Scanning Electron Microscope (SEM) JSM 7100F (JEOL, Japan).
Transmission Electron Microscopy (TEM) and High-Resolution Transmission Electron Microscopy (HTEM) images were performed using a JEM-2100 F microscope working at an acceleration voltage of 200 kV. The zeta potential was measured using a Zetasizer Nano ZS90
(Malvern Instruments Ltd., UK, England). The pH for the solutions of MXenes in deionized (DI) water was adjusted using HCl and NaOH. At each pH value, ten measurements were collected for the zeta potential and the mean value was reported. The water contact angle (WCA)
was measured via a contact angle meter (DSA30 Drop Shape Analyzer from Kruss).
Transmission Electron Microscopy (TEM) and High-Resolution Transmission Electron Microscopy (HTEM) images were performed using a JEM-2100 F microscope working at an acceleration voltage of 200 kV. The zeta potential was measured using a Zetasizer Nano ZS90
(Malvern Instruments Ltd., UK, England). The pH for the solutions of MXenes in deionized (DI) water was adjusted using HCl and NaOH. At each pH value, ten measurements were collected for the zeta potential and the mean value was reported. The water contact angle (WCA)
was measured via a contact angle meter (DSA30 Drop Shape Analyzer from Kruss).
4
Characterization of Polyamide/Polysulfone Composite Membranes
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The surface and the cross-section morphologies of PSF UF substrate and the positively charged PA01/PSF, PA11/PSF, and PA10/PSF composite NF membranes, were observed with scanning electron microscope (SEM, Phenom XL, Netherlands). Before observation, these samples were fractured in liquid nitrogen, and were sprayed with gold on the surface by using an ion sputter JS-16009. The 3-D morphology and the roughness of the membrane surface were obtained on an atomic force microscope (AFM, SPM-9700, Shimadzu Corp., Japan). The chemical structures of the membranes were investigated by attenuated total reflectance-fourier transform infrared (ATR-FTIR) spectroscope (Nicolet iS10, Thermo Fisher Scientific, the United States). Furthermore, the hydrophilicities of the membranes were characterized with a water contact angle (CA) goniometer (Drop Shape Analyzer-DSA30, KRÜSS, Germany). The electro-kinetic characteristic of the membrane surface was characterized with an electrokinetic analyzer (SurPASS™ 3, Anton Paar GmbH, Austria) at pH ranging from 2 to 10, using 0.001 mol L−1 KCl aqueous solution. The surface zeta potential was calculated according to the Helmholtz-Smoluchowski equation with the Fairbrother and Mastin substitution.37 (link)
5
Contact Angle Measurements on Nanofilms
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We performed static and dynamic contact angle measurements on Ti-5 nm, Fe-10 nm and Ti-5 nm-Fe-10 nm samples, using a commercial setup (Krüss, Drop Shape Analyzer DSA30) and its associated software (Advance DSA4). Only droplets containing 250 mM KCl were studied. Experiments were performed just after their deposition to record the initial states.
In the static mode, a syringe was used to deposit a 5 µl droplet onto the nanofilm. After imaging the droplet, the software fitted the hemisphere profile and measured two contact angles (for each side of the droplet, see Fig.S3 A, SI). We further define the static contact angle by the one measured just after water droplet deposition (see Table S1 , SI).
In the dynamic mode, we measured the advancing contact angle by increasing the droplet’s volume from 10 to 30 µl and the receding contact angle by reducing the droplet’s volume from 30 to 10 µl within 20 s (see Fig.S3 B, SI). Only the final angles reached at 30 µl (advancing) and 10 µl (receding) after a few minutes are reported in Table S1 , SI.
In the static mode, a syringe was used to deposit a 5 µl droplet onto the nanofilm. After imaging the droplet, the software fitted the hemisphere profile and measured two contact angles (for each side of the droplet, see Fig.
In the dynamic mode, we measured the advancing contact angle by increasing the droplet’s volume from 10 to 30 µl and the receding contact angle by reducing the droplet’s volume from 30 to 10 µl within 20 s (see Fig.
6
Wettability Characterization of PTB7 Films
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PTB7 and PTB7-b-P4VP films were deposited by blade coating (v = 10 mm s−1, 50 °C) on glass substrates from 8 mg∙mL−1 and 2 mg∙mL−1 chlorobenzene solutions, respectively. After this, the deposition the films were subjected to annealing treatment at 120 °C for 5 min. Contact angles (CA) were measured using a Drop shape analyzer DSA30 (KRUSS, Hamburg, Germany) in the sessile static mode [44 (link)]. About 10 independent drops of solvent were dropped on each substrate, and left and right contact angle values were extrapolated by a circle fitting algorithm. For each drop, 15 CA estimations were performed, and the average value was calculated.
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