All-nanoparticle layer-by-layer coatings for Mid-IR on-chip gas sensing

Diana Al Husseini; Junchao Zhou; Daniel Willhelm; Trevor Hastings; Gregory S. Day; Hong-Cai Zhou; Gerard L. Coté; Xiaofeng Qian; Ricardo Gutierrez-Osuna; Pao Tai Lin; Svetlana A. Sukhishvili

doi:10.1039/D0CC05513A

All-nanoparticle layer-by-layer coatings for Mid-IR on-chip gas sensing†

Diana Al Husseini,

^a Junchao Zhou,^b Daniel Willhelm,

^a Trevor Hastings,

^a Gregory S. Day,^c Hong-Cai Zhou,

^ac Gerard L. Coté,

^d Xiaofeng Qian,

^a Ricardo Gutierrez-Osuna,^e Pao Tai Lin

^ab and Svetlana A. Sukhishvili

*^a

Author affiliations

* Corresponding authors

^a Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
E-mail: svetlana@tamu.edu

^b Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA

^c Department of Chemistry, Texas A&M University, College Station, TX 77843, USA

^d Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA

^e Department of Computer Science and Engineering, Texas A&M University, College Station, TX 77843, USA

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.

Chemical Communications

All-nanoparticle layer-by-layer coatings for Mid-IR on-chip gas sensing†

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All-nanoparticle layer-by-layer coatings for Mid-IR on-chip gas sensing

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