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ACS Appl Mater Interfaces

Title:		Biomimetic Metal-Organic Framework-Based Photonic Crystal Sensor for Highly Sensitive Visual Detection and Effective Discrimination of Benzene Vapor
Author(s):		Gao L; Kou D; Ma W; Zhang S;
Address:		"State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian, Liaoning 116023, P.R. China"
Journal Title:		ACS Appl Mater Interfaces
Year:		2023
Volume:		20230617
Issue:		25
Page Number:		30606 - 30618
DOI:		10.1021/acsami.3c03673
ISSN/ISBN:		1944-8252 (Electronic) 1944-8244 (Linking)
Abstract:		"Due to the large specific surface area and continuous pores in structures, metal-organic frameworks (MOFs) show great advantages in the adsorption of volatile organic compounds (VOCs). Photonic crystal (PC) sensors derived from MOFs are promising for the visual detection of VOC gases. However, they still have problems of low sensitivity and poor color saturation and tunability. Here, inspired by vapor-sensitive scales of Tmesisternus isabellae beetle and scattering light absorption of polydopamine, a porous one-dimensional PC sensor is constructed by combining ZIF-8 with TiO(2)@PDA nanoparticles. The PC sensor shows significant color changes under different concentrations of benzene vapor and reaches a detection limit of 0.8 g/m(3). It has a response time of less than 1 s and maintains stable optical performance after 100 times of reuse. Moreover, ZIF-67 and ZIF-7 are both incorporated into the PCs for comparison; it reveals that ZIF-8 shows superior benzene detecting property. Additionally, the synergistic adsorption of VOCs in inner and outer holes of the ZIF-8 layer is demonstrated by real-time mass monitoring with quartz crystal microbalance with dissipation. This study provides a valuable reference for the fabrication of high-quality MOF-based PC sensors and sensing mechanism study between microscopic molecular adsorption and macroscopic performance"
Keywords:		metal-organic frameworks photonic crystals quartz crystal microbalance visual detection volatile organic compounds;
Notes:		"PubMed-not-MEDLINEGao, Lei Kou, Donghui Ma, Wei Zhang, Shufen eng 2023/06/17 ACS Appl Mater Interfaces. 2023 Jun 28; 15(25):30606-30618. doi: 10.1021/acsami.3c03673. Epub 2023 Jun 17"