All-nanoparticle layer-by-layer coatings for Mid-IR on-chip gas sensing. Issue 91 (1st November 2020)

• Record Type: Journal Article
• Authors: Al Husseini, Diana; Zhou, Junchao; Willhelm, Daniel; Hastings, Trevor; Day, Gregory S.; Zhou, Hong-Cai; Coté, Gerard L.; Qian, Xiaofeng; Gutierrez-Osuna, Ricardo; Lin, Pao Tai; Sukhishvili, Svetlana A.
• Is Part Of: Chemical communications. Volume 56:Issue 91(2020)
• Page Start: 14283
• Page End: 14286
• Publication Date: 2020-11-01
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d0cc05513a
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Functionalization of optical waveguides with submicron all-nanoparticle coatings significantly enhanced the detection of acetone. Such coatings were enabled via precise control of the substrate withdrawal speed using the layer-by-layer deposition. Abstract : Functionalization of optical waveguides with submicron coatings of zinc peroxide (ZnO2 ) and silica (SiO2 ) nanoparticles (NPs) is reported that enabled selective concentration of acetone vapors in the vicinity of the waveguide, boosting the sensitivity of a mid infrared (MIR) on-chip detector. Controlled thickness was achieved by introducing precise control of the substrate withdrawal speed to the layer-by-layer (LbL) deposition technique.