Two-Dimensional Nanostrips of Hydrophobic Copper Tetradecanoate for Making Self-Cleaning Glasses

Table 2

Measured values of the contact angle and roll-off angle for a water droplet on glass substrates coated with copper tetradecanoate (CTD) in the form of randomly aligned nanostrips (samples G1 to G30) and a microflowerlike surface structure (MF). Contact angles for two samples (G30 and MF) after annealing at 200°C (G30-200°C and MF-200°C, resp.) are also shown.

Sample ID	Sample description	Dipping cycles	Contact angle	Roll-off; angle
G1	Glass slide dip-coated by CTD nanostrips	1	60.2°  ± 3.5°	—
G2	Glass slide dip-coated by CTD nanostrips	2	60.6°  ± 3.7°	—
G3	Glass slide dip-coated by CTD nanostrips	3	91.3°  ± 4°	—
G5	Glass slide dip-coated by CTD nanostrips	5	110.5°  ± 3.5°	—
G7	Glass slide dip-coated by CTD nanostrips	7	115.9  ± 3.6°	—
G10	Glass slide dip-coated by CTD nanostrips	10	129.1°  ± 4°	—
G15	Glass slide dip-coated by CTD nanostrips	15	136.1°  ± 3°	—
G20	Glass slide dip-coated by CTD nanostrips	20	140.4°  ± 2°	—
G30	Glass slide dip-coated by CTD nanostrips	30	147°  ± 2°	3°
G30-200°C	“G30” annealed at 200°C	—	130°  ± 4°	—
MF	CTD microflower on Cu plate	—	160°  ± 2°	2°
MF-200°C	“MF” annealed at 200°C	—	150°  ± 2°	3°