One-step chemical treatment to design an ideal nanospacer structure for a highly sensitive and transparent pressure sensor. Issue 17 (9th April 2019)

• Record Type: Journal Article
• Authors: Woo, Ho Kun; Kim, Haneun; Jeon, Sanghyun; Lee, Woo Seok; Ahn, Junhyuk; Bang, Junsung; Kang, Min Su; Oh, Soong Ju
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 17(2019)
• Page Start: 5059
• Page End: 5066
• Publication Date: 2019-04-09
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc00820a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : An ideal open meshed structure for a highly sensitive and transparent pressure sensor is simply fabricated by one-step chemical treatment. Abstract : Highly transparent and sensitive pressure sensors with a wide detection range were developed by a simple process using silver nanowires and ZnO nanocrystals (NCs) without lithography. The open mesh structured spacers were sucessfully designed by one-step chemical treatment involving a ligand exchange process on the ZnO NC thin films, leading to improved sensitivity, responsivity and transparency. The device performance analyses along with chemical, structural, and electronic characterization studies reveal that the chemically designed pressure sensor has a record-breaking sensitivity of 3.23 × 10 3 kPa −1, a large detection range of up to 75 kPa, excellent reliability, and high transparency of 85% in the visible-light region. The origin of improved sensitivity was explained with the contact area variation theory. We also demonstrate that the pressure sensor fabricated by the all-solution-based facile process can be employed in various applications such as wearable sensors for measurement of the human pulse and attachable electronics for an electronic skin with a wide sensing range of pressures.