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. Author manuscript; available in PMC: 2011 Sep 21.
Published in final edited form as: Langmuir. 2010 Sep 21;26(18):15050–15056. doi: 10.1021/la102306z

Table 1.

Mean surface roughness of layers in PSA-SWNTs sensor assembly from AFMa

surface layer architecture mean surface roughness (nm)
mica/Nafion 2.2 ± 0.6
mica/Nafion/FeO(OH)-FeOCl 14.5 ± 1.2
mica/Nafion/FeO(OH)-FeOCl/SWNT forests 21.1 ± 2.5
mica/Nafion/FeO(OH)-FeOCl/SWNT forests/
primary anti-PSA antibody		 18.9 ± 2.2
mica/Nafion/FeO(OH)-FeOCl/SWNT forests/
primary anti-PSA antibody/BSA		 18.5 ± 2.0
mica/Nafion/FeO(OH)-FeOCl/SWNT forests/
primary anti-PSA antibody/BSA/PSA in calf
serum		 16.3 ± 1.7
mica/Nafion/FeO(OH)-FeOCl/SWNT forests/
primary anti-PSA antibody/BSA/PSA in calf
serum/singly labeled secondary antibody		 14.2 ± 1.6
a

Surface roughness was estimated using Nanoscope ® IV Version 5.30r3.Sr3 software (Veeco).