Ultra-Broad Linear Range and Sensitive Flexible Piezoresistive Sensor Using Reversed Lattice Structure for Wearable Electronics

Flexible pressure sensors have attracted significant attention owing to their broad applicability in wearable electronics and human–machine interfaces. However, it is still challenging to simultaneously achieve a broad sensing range and high linearity. Here, we present a reversed lattice structure (...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:ACS applied materials & interfaces 2023-07, Vol.15 (28), p.34120-34131
Hauptverfasser: Bang, Joohyung, Chun, Byungkwon, Lim, Jaeyoung, Han, Yongha, So, Hongyun
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Flexible pressure sensors have attracted significant attention owing to their broad applicability in wearable electronics and human–machine interfaces. However, it is still challenging to simultaneously achieve a broad sensing range and high linearity. Here, we present a reversed lattice structure (RLS) piezoresistive sensor obtained through a layer-level engineered additive infill structure via conventional fused deposition modeling three-dimensional (3D) printing. The optimized RLS piezoresistive sensor attained a pressure sensing range (0.03–1630 kPa) with high linearity (coefficient of determination, R 2 = 0.998) and sensitivity (1.26 kPa–1) due to the structurally enhanced compressibility and spontaneous transition of dominant sensing mechanism of the sensor. It also exhibited great mechanical/electrical durability and a rapid response/recovery time (170/70 ms). This remarkable performance enables the detection of various human motions over a broad spectrum, from pulse detection to human walking. Finally, a wearable electronic glove was developed to analyze the pressure distribution in various situations, thereby demonstrating its applicability in multipurpose wearable electronics.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.3c07554