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Nanomaterials 2017, 7(9), 242; doi:10.3390/nano7090242

The Tuning of Optical Properties of Nanoscale MOFs-Based Thin Film through Post-Modification

1
College of Science, National University of Defense Technology, Changsha 410073, China
2
College of Optoelectronic Science and Engneering, National University of Defense Technology, Changsha 410073, China
*
Authors to whom correspondence should be addressed.
Received: 22 July 2017 / Revised: 17 August 2017 / Accepted: 22 August 2017 / Published: 29 August 2017
(This article belongs to the Special Issue Nanoparticles in Metal-Organic Frameworks)
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Abstract

Optical properties, which determine the application of optical devices in different fields, are the most significant properties of optical thin films. In recent years, Metal-organic framework (MOF)-based optical thin films have attracted increasing attention because of their novel optical properties and important potential applications in optical and photoelectric devices, especially optical thin films with tunable optical properties. This study reports the first example of tuning the optical properties of a MOF-based optical thin film via post-modification. The MOF-based optical thin film was composed of NH2-MIL-53(Al) nanorods (NRs) (MIL: Materials from Institute Lavoisier), and was constructed via a spin-coating method. Three aldehydes with different lengths of carbon chains were chosen to modify the MOF optical thin film to tune their optical properties. After post-modification, the structural color of the NH2-MIL-53(Al) thin film showed an obvious change from purple to bluish violet and cyan. The reflection spectrum and the reflectivity also altered in different degrees. The effective refractive index (neff) of MOFs thin film can also be tuned from 1.292 to 1.424 at a wavelength of 750 nm. The success of tuning of the optical properties of MOFs thin films through post-modification will make MOFs optical thin films meet different needs of optical properties in various optical and optoelectronic devices. View Full-Text
Keywords: metal-organic frameworks; thin film; optical property; refractive index; post-modification metal-organic frameworks; thin film; optical property; refractive index; post-modification
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yin, W.; Tao, C.-A.; Zou, X.; Wang, F.; Qu, T.; Wang, J. The Tuning of Optical Properties of Nanoscale MOFs-Based Thin Film through Post-Modification. Nanomaterials 2017, 7, 242.

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