In a typical experiment, Cu2O (10.5 mg), DI-water (5.4 mL), and ethanol (6 mL) were added sequentially to a 25 mL flat-bottom flask. After ultrasonication for 10 min, 340 mg PVP (molecular weight 24 000) was added to the solution. The solution was vigorously stirred for 15 min, after which 0.6 mL of ZnCl2 (7.4 mg) aqueous solution was added. The mixture was stirred for an additional 10 min. Then, 4 mL of 1M Na2S2O3 aqueous solution were added dropwise (drop/2s) to the above mixture. Finally, the mixture was stirred for 10 min. The yellow mixture gradually changed to transparent gray, and the products were collected by centrifugation and washed with acetone and methanol three times. The hydrodynamic diameters of as-prepared products were determined by dynamic light scattering (DLS) (Microtrac Nanotrac Ultra) (Figure S2c, SI ).
Nanotrac ultra
Manufactured by Microtrac
The Nanotrac Ultra is a dynamic light scattering (DLS) instrument designed for the measurement of particle size, zeta potential, and molecular weight of materials in the nano and submicron range. The instrument utilizes a patented optical system and digital signal processing to provide accurate and reliable results for a wide range of samples, including colloids, polymers, and nanoparticles.
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Lab products found in correlation
2 protocols using nanotrac ultra
1
Synthesis of Cu2O Nanoparticles
2
Characterization of Surface Wettability and Nanostructures
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Contact angle measurements were performed
using a Rame-Hart 200-00 Std.-Tilting B. goniometer. Static contact
angles were measured using 6 μL water droplets. ImageJ Drop
Analysis was used to analyze the droplets. SEM images were obtained
using a Zeiss Sigma VP FEG-SEM at 10 kV in high-vacuum mode. Raman
spectroscopy was conducted using an iRaman Plus. The thiol conversion
was monitored by measuring the area of the thiol absorption peak at
2576 cm–1. Conversions were calculated with the
ratio of the peak area to the peak area prior to polymerization. All
reactions were performed under ambient conditions. Transmission electron
micrographs (TEMs) (Digital Imaging with Gatan model 785 ES1000W Erlangshen
CCD Camera) were taken with a Zeiss 900 TEM operating at 50 kV. UV–vis
spectra were obtained by using a PerkinElmer Lambda 35 UV–vis
spectrometer. Optical microscope images were obtained by using an
Olympus BX52 digital optical microscope system. Dynamic light scattering
analysis was conducted using a Microtrac Nanotrac Ultra. Confocal
images were obtained using a Zeiss LSM 510 confocal laser-scanning
microscope with a 543 nm HeNe laser.
using a Rame-Hart 200-00 Std.-Tilting B. goniometer. Static contact
angles were measured using 6 μL water droplets. ImageJ Drop
Analysis was used to analyze the droplets. SEM images were obtained
using a Zeiss Sigma VP FEG-SEM at 10 kV in high-vacuum mode. Raman
spectroscopy was conducted using an iRaman Plus. The thiol conversion
was monitored by measuring the area of the thiol absorption peak at
2576 cm–1. Conversions were calculated with the
ratio of the peak area to the peak area prior to polymerization. All
reactions were performed under ambient conditions. Transmission electron
micrographs (TEMs) (Digital Imaging with Gatan model 785 ES1000W Erlangshen
CCD Camera) were taken with a Zeiss 900 TEM operating at 50 kV. UV–vis
spectra were obtained by using a PerkinElmer Lambda 35 UV–vis
spectrometer. Optical microscope images were obtained by using an
Olympus BX52 digital optical microscope system. Dynamic light scattering
analysis was conducted using a Microtrac Nanotrac Ultra. Confocal
images were obtained using a Zeiss LSM 510 confocal laser-scanning
microscope with a 543 nm HeNe laser.
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