Herein, we introduce an interdigitated horizontal
electrode (IHE) structure with a
metal-based electron-collecting (or -injecting)
electrode and a hole-collecting (or -injecting)
electrode composed of a conductive polymeric material that has a nanoscale distance and is horizontally separated. In the IHE, a
metal electrode is fabricated on a
silicon-
oxide substrate, and a self-assembled monolayer (SAM) is selectively bonded to the
metal and the
oxide to form a conductive
polymer electrode by dip coating. Each of the SAM materials is composed of a head part bonded to the substrate surface and a tail part that is hydrophilic or hydrophobic. This inherent property makes the
metal electrode hydrophobic and the
oxide substrate hydrophilic. Ag is used as a
metal electrode material and is combined with alkanethiol
SAMs. The alkylsilane
SAMs are combined with the
silicon oxide substrate to make them hydrophilic, using poly (3, 4-ethylenedioxythiophene)-poly (
PEDOT: PSS) as the conductive
polymer material. In this study, we have found that there is a difference in the spacing between the two
electrodes that depends on the combination of SAM materials. Each interval was spaced from a minimum of 140 nm to a maximum of 385 nm.