« Previous AbstractAnharmonic kinetics of the cyclopentane reaction with hydroxyl radical    Next AbstractBiogenic volatile organic compounds from 14 landscape woody species: Tree species selection in the construction of urban greenspace with forest healthcare effects »

Nanoscale

Title:		Nanoscale light-matter interactions in metal-organic frameworks cladding optical fibers
Author(s):		Wu J; Zhang W; Wang Y; Li B; Hao T; Zheng Y; Jiang L; Chen K; Chiang KS;
Address:		"School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China. jieyunwu@uestc.edu.cn"
Journal Title:		Nanoscale
Year:		2020
Volume:		12
Issue:		18
Page Number:		9991 - 10000
DOI:		10.1039/c9nr09061d
ISSN/ISBN:		2040-3372 (Electronic) 2040-3364 (Linking)
Abstract:		"The utilization of refractive index (RI) change due to guest-host interactions between the guest volatile organic compound vapor and porous metal-organic frameworks (vapor-MOF interactions) is promising in photonic vapor sensors. Therefore, the study of light-matter interactions in nanoporous metal-organic frameworks (MOFs) is fundamental and essential for MOF-based photonic devices. In this work, the manipulation of light in MOFs to investigate the vapor-MOF interactions by using optical fiber devices is demonstrated. The vapor-MOF interactions and the light-vapor interactions (light in MOFs to sense the RI changes resulting from the vapor-MOF interactions) are investigated. The cladding mode is excited by a long-period fiber grating (LPFG) for evanescent field sensing in a ZIF-8 sensitive coating. The experimental results combining quantum chemical calculations and optical simulations reveal the relationships between the microscopic energy of vapor desorption, RI changes and evanescent field enhancement in ZIF-8 during the vapor-MOF interactions. With exceptionally large RI changes, the evanescent field of cladding mode in ZIF-8 is greatly enhanced to sense the vapor-MOF interactions. As a proof-of-concept, a LPFG sensor with ZIF-8 coating showed a high sensitivity of 1.33 pm ppm-1 in the linear range from 9.8 ppm to 540 ppm for the sensing of ethanol vapor. The investigation of light-matter interactions in ZIF-8 provides a useful guideline for the design and fabrication of MOF-based optical waveguide/fiber sensors"
Keywords:
Notes:		"PubMed-not-MEDLINEWu, Jieyun Zhang, Wanying Wang, Ying Li, Binghui Hao, Ting Zheng, Youbin Jiang, Lianzhong Chen, Kaixin Chiang, Kin Seng eng England 2020/03/07 Nanoscale. 2020 May 14; 12(18):9991-10000. doi: 10.1039/c9nr09061d"