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We successfully optimized the charge injection of pentacene-based organic thin-film transistors with bottom contact by immobilizing deoxyribonucleic acid (DNA) on gold electrodes. The single-stranded DNA having mercapto group (-SH) was used as the modified layer by molecular self-assembly onto the surface of gold electrodes. The threshold voltage is −10 V, and the field-effect mobility reaches 0.34 cm...
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