Table 2.

Summary of surface charge (mV) and DLS measurements with change in concentration of dopamine in PTFE@PDA–PEI keeping all other constituents (PEI: 1 ml, ammonia water: 1 ml; PTFE: 100 mg) fixed.

sample	DA (g l−1)	ζ-potential (mV)	aveDh (nm)
1	0.1	−12.17	960
2	0.2	−6.94	1767
3	0.4	−5.99	2331
4	0.6	−0.71	549
5	0.8	3.54	1073
6	1.0	5.96	648
7	2.0	9.78	209
8	3.0	11.14	479