Flexible silicon nanowires sensor for acetone detection on plastic substrates. (19th January 2022)

• Record Type: Journal Article
• Authors: Lan, Kuibo; Wang, Zhi; Yang, Xiaodong; Wei, Junqing; Qin, Yuxiang; Qin, Guoxuan
• Is Part Of: Nanotechnology. Volume 33:Number 15(2022)
• Publication Date: 2022-01-19
• Subjects: bending -- flexible -- silicon nanowires -- sensor; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac46b3
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Acetone commonly exists in daily life and is harmful to human health, therefore the convenient and sensitive monitoring of acetone is highly desired. In addition, flexible sensors have the advantages of light-weight, conformal attachable to irregular shapes, etc. In this study, we fabricated high performance flexible silicon nanowires (SiNWs) sensor for acetone detection by transferring the monocrystalline Si film and metal-assisted chemical etching method on polyethylene terephthalate (PET). The SiNWs sensor enabled detection of gaseous acetone with a concentration as low as 0.1 parts per million (ppm) at flat and bending states. The flexible SiNWs sensor was compatible with the CMOS process and exhibited good sensitivity, selectivity and repeatability for acetone detection at room temperature. The flexible sensor showed performance improvement under mechanical bending condition and the underlying mechanism was discussed. The results demonstrated the good potential of the flexible SiNWs sensor for the applications of wearable devices in environmental safety, food quality, and healthcare.