Photoeffects at a polyaniline film electrode
Abstract The conductive properties of a polyaniline film on a platinum electrode in sulfuric acid solutions have been studied using the current response to a light flash perturbation. For polyaniline in an insulating state, short-lived photocurrents were observed which lasted no longer than the light from the flash-unit itself, (first order decay constant (τ) less than 1.5 ms). For polyaniline in a conductive state, longer-lasting photocurrents were observed, ( τ > 1.5ms), which provided an immediate indicator of regions of enhanced conductivity. Prolonged photocurrents indicative of high conductivity were observed up to a pH of 3.7, beyond which only shorter transients were obtained, consistent with previous polyaniline conductivity studies. The transition from conducting to insulating regions at more positive potentials was marked by the appearance of a short-lived cathodic photoresponse in place of a prolonged anodic photocurrent. This transition occurred at more positive potentials as the pH was lowered. Light of wavelengths longer than 600 nm still produced a significant photocurrent. Two models are proposed to account for the photocurrents when polyaniline is in an insulating and a conductive state.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기