The phrase "a diameter of around" is correct and usable in written English.
It can be used when describing an approximate measurement of a diameter in various contexts, such as science, engineering, or everyday conversation.
Example: "The tree has a diameter of around 30 inches, making it one of the largest in the park."
Alternatives: "an approximate diameter of" or "a diameter of approximately".
From the resulting three-dimensional digital model, the team were able to analyse the organ and determine that it had a diameter of around 1cm.
Schwann-cell tubes having a diameter of around 0.5 mm and variable lengths can thus be generated.
X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) were used to characterize the structure of Pd/MWCNTs, and the results showed that Pd nanoparticles with highly crystalline structure and a diameter of around 4 nm were prepared, and more importantly, except for carbon and palladium no other elements were detected.
Figure 2a shows the nanowires with a diameter of around 60 to 120 nm.
Pt electrode with a diameter of around 200 μm was used to fabricate a symmetrical metal-insulator-metal (MIM) sandwich structure by shadow mask.
Figure 3a (gas flow is 50 sccm) shows the nanowires with a diameter of around 70 to 150 nm and length of about 400 to 1,000 nm.
The hierarchical silica microparticles exhibited an diameter of around 10 μm and proper nano-roughness to realize a superhydrophobic effect.
Adenosine triphosphate (ATP) and acetylcholine (ACh) were puff-applied using a Picospritzer II (General Valve/Parker Hanifin, Flein/Heilbronn, Germany) coupled to standard micropipettes with a tip diameter of around 1.5 μm (Hilgenberg, Waldkappel, Germany) placed at a distance of approximately 10 20 μm above the cell layer.
A planar coil has an outer diameter of around 4 m.
As shown in Fig. 1a, the BNNFs have stacked-platelet morphology and a mean diameter of around 130 nm.
After the procedure of Ga molecular beam supply, numerous nearly hemispherical Gallium droplets were formed, with an average diameter of around 160 nm and a density of around 1 × 108 cm−2.
