Table 1 Peak potential difference (∆Ep) and charge transfer resistance (Rct) values for different Au sensors before and after cleaning procedures.

From: Cleaning of LTCC, PEN, and PCB Au electrodes towards reliable electrochemical measurements

Cleaning procedures

∆Ep (mV)

Rct (Ω cm2)

LTCC

PEN

PCB

LTCC

PCB

Uncleaned

410 ± 80

271 ± 7

141 ± 13

1790 ± 270

670 ± 42

UV-O3

104 ± 6

104 ± 1

118 ± 4

233 ± 15

450 ± 40

Piranha

97 ± 1

93 ± 1

Corroded

170 ± 30

Corroded

KOH + H2O2

90 ± 2

94 ± 1

103 ± 1

90 ± 26

300 ± 10

KOH + H2O2/KOH sweep

89 ± 2

88 ± 0

110 ± 2

87 ± 11

365 ± 25

H2SO4 CV

83 ± 1

97 ± 1

Corroded

65 ± 8

Corroded

  1. The Rct values were normalized by the effective electrode area. Measurements are averaged over four separate samples.
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