Bimodal phase separated block copolymer/homopolymer blends self-assembly for hierarchical porous metal nanomesh electrodes
| Autor: | Hyeong Min Jin, Young-Gi Lee, Seung Keun Cha, Dong Ok Shin, Jin Young Choi, Jun Soo Kim, Suwan Jeon, Jonghwa Shin, Seong-Jun Jeong, Geon Gug Yang, Sang Ouk Kim, Jang Hwan Kim, Taeyong Chang, Ju Young Kim, Bong Hoon Kim, Kwang Man Kim |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nanoporous Oxide Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Nanomesh chemistry Phase (matter) Electrode General Materials Science Self-assembly Thin film 0210 nano-technology Microscale chemistry |
| Zdroj: | Nanoscale. 10:100-108 |
| ISSN: | 2040-3372 2040-3364 |
| DOI: | 10.1039/c7nr07178g |
| Popis: | Transparent conducting electrodes (TCEs) are essential components in various optoelectronic devices. Nanostructured metallic thin film is one of the promising candidates to complement current metal oxide films, such as ITO, where high cost rare earth elements have been a longstanding issue. Herein, we present that multiscale porous metal nanomesh thin films prepared by bimodal self-assembly of block copolymer (BCP)/homopolymer blends may offer a new opportunity for TCE. This hierarchical concurrent self-assembly consists of macrophase separation between BCP and homopolymer as well as microphase separation of BCP, and thus provides a straightforward spontaneous production of a highly porous multiscale pattern over an arbitrary large area. Employing a conventional pattern transfer process, we successfully demonstrated a multiscale highly porous metallic thin film with reasonable optical transparency, electro-conductance, and large-area uniformity, taking advantage of low loss light penetration through microscale pores and significant suppression of light reflection at the nanoporous structures. This well-defined controllable bimodal self-assembly can offer valuable opportunities for many different applications, including optoelectronics, energy harvesting, and membranes. |
| Databáze: | OpenAIRE |
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