Details

Autor(en) / Beteiligte

• Zhao, Tonghan
• Taghizade, Narges
• Fischer, Jan C
• Richards, Bryce S
• Howard, Ian A

Titel

[001]-Oriented heteroepitaxy for fabricating emissive surface mounted metal-organic frameworks

Ist Teil von

• Journal of materials chemistry. C, Materials for optical and electronic devices, 2024-04, Vol.12 (15), p.5496-555

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Well-oriented growth of surface-anchored metal-organic frameworks (SURMOFs) makes them ideal candidates for optical sensor applications. In this work, SURMOF bilayers and trilayers that exhibit [001] orientation are formed via heteroepitaxial growth. Using liquid-phase epitaxy (LPE), a 〈100〉 silicon substrate is alternatingly exposed to a solution of metal salts and organic linkers. A Cu 2 (BDC) 2 (DABCO) basis layer allows subsequent deposition of Zn 2 (BDC) 2 (DABCO) with 93% of the material aligned in the crystallographic [001] orientation. This is not possible without a Cu-SURMOF seed layer. Out-of-plane X-ray diffraction, 2D grazing-incidence wide-angle X-ray scattering, and scanning electronic microscopy techniques reveal that the hybrid SURMOFs display oriented island-type film growth, resulting in multishell islands. A third oriented SURMOF Zn 2 (ADC) 2 (BPy) can be added to endow the heterostructure with photoluminescence, which is not quenched by the Cu-SURMOF due to the intermediate Zn 2 (BDC) 2 (DABCO) layer. Conceptually, the step-by-step LPE deposition method allows the construction of monolithic multilayer SURMOFs wherein the orientation can be controlled by well-behaved templating layers and functionality can be added by more exotic layers that are challenging to grow on their own. A hybrid SURMOF with specific crystallographic [001] orientation is fabricated via step-by-step liquid-phase heteroepitaxial method. The preferential [001] orientation of Cu 2 (BDC) 2 (DABCO) is retained via Zn 2 (BDC) 2 (DABCO) to Zn 2 (ADC) 2 (BPy).