کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1489873 992313 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photoelectrochemical properties of electrostatically self-assembled multilayer films formed by three bipolar hemicyanines and H4SiW12O40
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Photoelectrochemical properties of electrostatically self-assembled multilayer films formed by three bipolar hemicyanines and H4SiW12O40
چکیده انگلیسی

The electrostatically self-assembled multilayer films of three bipolar hemicyanines with varied alkyl chain lengths were prepared by alternating adsorption of H4SiW12O40 and these hemicyanines, and characterized by UV–vis absorption spectroscopy, X-ray photoelectron spectroscopy and cyclic voltammetry. The results showed that these inorganic–organic composite films were uniformly deposited with good electrochemical activity. Photoelectrochemical investigations showed that the films exhibited large cathodic photocurrent densities of 0.36–1.02 μA/cm2 with the monochromatic incident photon-to-electron conversion efficiency of 0.75–0.98% while irradiated with 100 mW/cm2 polychromatic light (730 nm > λ > 325 nm) at an applied potential of −0.2 V vs. saturated calomel electrode, being strongly dependent on the alkyl chain lengths.

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► Three self-assembled films of hemicyanines of and H4SiW12O40.
► Uniformly deposited multilayers with reversible electrochemical activity.
► Large cathodic photocurrent densities of 0.36–1.02 μA/cm2 with IPCE of 0.75–0.98%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 48, Issue 2, February 2013, Pages 595–602
نویسندگان
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