Universal Fluorescence Enhancement Substrate Based on Multiple Heterostructure Photonic Crystal with Super‐Wide Stopband and Highly Sensitive Cr(VI) Detecting Performance. Issue 11 (3rd April 2018)

• Record Type: Journal Article
• Authors: Zhang, Lijing; Wang, Jie; Tao, Shengyang; Geng, Chong; Yan, Qingfeng
• Is Part Of: Advanced optical materials. Volume 6:Issue 11(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-04-03
• Subjects: Cr(VI) detection -- fluorescence enhancement -- heterostructure photonic crystal -- super‐wide stopband -- universal substrate; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.201701344
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Universal fluorescence (FL) enhancement is achieved based on a multiple heterostructure photonic crystal (MHPC) with a super‐wide stopband. This MHPC film is fabricated by layer‐by‐layer deposition of annealed colloidal crystal monolayers with gradient sizes, and it displays a broadened stopband (from 280 to 650 nm) that can overlap with the excitation wavelength ( E ) and the emission wavelength ( F ) of most commonly used fluorescent media. More than 100‐fold FL enhancement of [Ru(dpp)3 Cl2 ], rhodamine 6G (Rh6G), and rhodamine B (RhB) on the MHPC is observed compared to that on a glass substrate. This super‐wide stopband MHPC may find significant applications for augmenting FL intensity in chemical and biochemical sensing, imaging, disease diagnosis, and environmental monitoring. The function of MHPC/rhodium B hydrazide composites is further demonstrated in the semiquantitative detection of Cr(VI), and the limit of detection of Cr(VI) is effectively improved to 0.2 ppb. Abstract : A novel multiple heterostructure photonic crystal structure with super‐wide stopband is demonstrated in this study. The super‐wide stopband can simultaneously overlap the excitation and emission wavelength of most commonly used fluorescent media and achieve universal fluorescent enhancement, indicating its potential to serve as a fluorescence enhancement sensing platform for accurate detection of Cr(VI) down to 0.2 ppb.