Open AccessRoom‐temperature ferroelectric K 2 W 7 O 22 (KWO) nanorods as a sensor material for the detection of acetone
Author(s) -
Johnson Michael,
Zhang Qifeng,
Wang Danling
Publication year - 2019
Publication title -
medical devices & sensors
Language(s) - English
Resource type - Journals
ISSN - 2573-802X
DOI - 10.1002/mds3.10044
Subject(s) - acetone , materials science , nanorod , ferroelectricity , tungsten , hydrothermal circulation , crystal structure , crystal (programming language) , facet (psychology) , single crystal , selectivity , nanotechnology , porosity , chemical engineering , analytical chemistry (journal) , optoelectronics , crystallography , composite material , chemistry , chromatography , organic chemistry , computer science , dielectric , engineering , metallurgy , programming language , catalysis , psychology , social psychology , big five personality traits , personality
Acetone has been shown to be a biomarker for diagnosing and monitoring diabetes. The newly synthesized K 2 W 7 O 22 (KWO) nanorods show a sensitive response to acetone at room temperature. This promising sensing performance could provide an optimal way to design an easy‐to‐use breathalyzer device for both personal and clinical use to monitor blood glucose levels non‐invasively. The preliminary results indicate that such good response is mainly due to the strong room temperature ferroelectric property of KWO, which has been controlled for the first time by optimizing the temperature for hydrothermal growth. The study of the relationship between material structure and properties indicates that the material is a single crystal with potassium atoms replacing the tungsten causing the ferroelectric property to emerge. The porous structure with a specific surface facet (002) exhibits good sensitivity and selectively for detection of acetone. The unique structure and material properties of as‐synthesized K 2 W 7 O 22 allow it to effectively interact with acetone. The preliminary results reveal that the sensing performance of K 2 W 7 O 22 can be further improved by tuning its crystal structure.