Static contact angle measurements were obtained using the sessile drop method and an OCA 15 Plus goniometer (DataPhysics Instruments, Germany) with a high‐performance image processing system (DataPhysics Instruments, Germany). Three microliters of either deionized water or diiodomethane were added using a motor driven syringe at room temperature (RT). The values of surface free energy were calculated by the Owens, Wendt, Rabel, and Kaelble (OWRK) method [46 ] that discerns polar and dispersive components of the surface energy, using the SCA20 version 2 software (DataPhysics Instruments, Germany). At least six measurements of each condition were performed per group.
Oca 15 plus goniometer
Manufactured by Dataphysics
Sourced in Germany
The OCA 15 Plus is a high-precision goniometer manufactured by Dataphysics. It is designed to accurately measure the contact angle of liquids on solid surfaces. The instrument utilizes a combination of optical and digital technologies to capture and analyze the profile of a droplet, providing precise measurements of the wetting characteristics of various materials.
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Lab products found in correlation
6 protocols using oca 15 plus goniometer
1
Sessile Drop Method for Surface Free Energy
2
Water Contact Angle Measurement of LbL Films
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The short-term WCA of both surfaces of the LbL films, i.e., the “bottom” side being the surface initially in contact with the polypropylene substrate and the “top” being the end-layer of freestanding LbL films, was assessed by water contact angle measurements using an OCA15plus goniometer equipment (DataPhysics Instruments, Filderstadt, Germany). For each different surface, 10 measurements of WCA were made at RT immediately after 1 µL drops of OW were dispensed by a motor-driven syringe. The results treatment was performed using the SCA20 software.
3
Surface Wettability and Energy Determination
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The contact angle with water and diiodomethane was measured for the determination of the surface energy. The sessile drop method was used to estimate the contact angles in the static regime. These measurements were carried out by means of an OCA15 Plus goniometer from DataPhysics Instruments (Filderstadt, Germany). Droplets of 3 μL were used to evaluate the surface wettability in different points of the sample. All measurements were carried out using a dose of 1 μL/s at room temperature. The model developed by Owens, Wendt, Rabel, and Kaelble, better known as the OWRK method, was used to calculate the surface free energy of the samples as well as the dispersive and polar components.
4
Wettability Characterization of Films
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Wettability was studied by measuring water contact angles using the sessile drop method on an OCA-15 Plus Goniometer (Data Physics, Neurtek Instruments, Eibar, Spain). Drops of distilled and deionized water of about 3 μL were dispensed on the surface of the films. After less than 5 s photographs of the drops were taken to make the water contact angle measurement on them. The results were expressed as an average from 5 measurements per sample.
5
Surface Wettability and Cell Adhesion
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Cell adhesion is influenced by surface hydrophilicity,[53 ] and an improvement in this parameter could improve the potential application in biomedical field. Besides, wettability measurements can give information about layers adhesion since polymerized layer has to be wetted by liquid resin to obtain adequate adhesion between the polymerized layer and the new one.
Hydrophilicity was studied by measuring the contact angle of water on the sample surface at room temperature (20°C). Dataphysics OCA15 plus goniometer and SCA20 software (DataPhysics Instruments GmbH, Filderstandt, Germany) were used for this purpose. At least ten contact angles were measured for each sample.
Hydrophilicity was studied by measuring the contact angle of water on the sample surface at room temperature (20°C). Dataphysics OCA15 plus goniometer and SCA20 software (DataPhysics Instruments GmbH, Filderstandt, Germany) were used for this purpose. At least ten contact angles were measured for each sample.
6
Surface Roughness and Wettability Analysis
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The surface roughness of the samples were measured
by an atomic force microscope (Nanoscope IV Dimension 3100, USA) equipped
with a dimension hybrid XYZ SPM scanner head (Veeco, New York, USA)
on the surface of PLL–HA and PLL–HADN combination layers
with a scan area of 5 × 5 μm2 in PBS on the
crystal surface, a scanning frequency of 1 Hz, and a scan area of
20 × 20 μm2 on PCU disks in the air condition.
Water contact angle measurements were also performed at room temperature
using an OCA 15 plus goniometer (DataPhysics Instruments). The values
were obtained by the sessile drop method. The used liquid was ultrapure
water, the drop volume was 5 μL, and over three measurements
were carried out for each sample. The chemical composition after exposure
to SF was evaluated by X-ray photoelectron spectroscopy (XPS), and
the details are presented in theSupporting Information .
by an atomic force microscope (Nanoscope IV Dimension 3100, USA) equipped
with a dimension hybrid XYZ SPM scanner head (Veeco, New York, USA)
on the surface of PLL–HA and PLL–HADN combination layers
with a scan area of 5 × 5 μm2 in PBS on the
crystal surface, a scanning frequency of 1 Hz, and a scan area of
20 × 20 μm2 on PCU disks in the air condition.
Water contact angle measurements were also performed at room temperature
using an OCA 15 plus goniometer (DataPhysics Instruments). The values
were obtained by the sessile drop method. The used liquid was ultrapure
water, the drop volume was 5 μL, and over three measurements
were carried out for each sample. The chemical composition after exposure
to SF was evaluated by X-ray photoelectron spectroscopy (XPS), and
the details are presented in the
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