Bifacial Dye Membranes: Ultrathin and Free‐Standing although not Being Covalently Bound
| العنوان: | Bifacial Dye Membranes: Ultrathin and Free‐Standing although not Being Covalently Bound |
|---|---|
| المؤلفون: | Maximilian L. Hupfer, Jan Dellith, Martin Seyring, Marco Diegel, Andrea Dellith, Soumik Ghosh, Markus Rettenmayr, Benjamin Dietzek‐Ivanšić, Martin Presselt |
| المصدر: | Advanced Materials. 35:2204874 |
| بيانات النشر: | Wiley, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Mechanics of Materials, Mechanical Engineering, General Materials Science |
| الوصف: | Layers of aligned dyes are key to photo-driven charge separation in dye sensitized solar cells, but cannot be exploited as rectifying membranes in photocatalysis to separate half-cells because they are not sufficiently stable. While impressive work on the fabrication of stable noncovalent membranes has been recently demonstrated, these membranes are inherently suffering from non-uniform orientation of the constituting dyes. To stabilize layers made from uniformly assembled and aligned dyes, they can be covalently cross-linked via functional groups or via chromophores at the expense of their optical properties. Here stable membranes from established dyes are reported that do not need to be elaborately functionalized nor do their chromophores need to be destroyed. These membranes are free-standing, although being only non-covalently linked. To enable uniform dye-alignment, Langmuir layers made from linear, water-insoluble dyes are used. That water-soluble charge transfer dyes adsorb onto and intercalate into the Langmuir layer from the aqueous subphase, thus yielding free-standing, molecularly thin membranes are demonstrated. The developed bifacial layers consist almost entirely of π-conjugated units and thus can conduct charges and can be further engineered for optoelectronic and photocatalytic applications. |
| تدمد: | 1521-4095 0935-9648 |
| DOI: | 10.1002/adma.202204874 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8af143033ea7dce6acc525deac324c1 https://doi.org/10.1002/adma.202204874 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c8af143033ea7dce6acc525deac324c1 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15214095 09359648 |
|---|---|
| DOI: | 10.1002/adma.202204874 |