Highly adhesive and self-healing γ-PGA/PEDOT:PSS conductive hydrogels enabled by multiple hydrogen bonding for wearable electronics

Development and Applications of Hydrogel-Based Triboelectric Nanogenerators: A Mini-Review

“…The introduced conductive polymers not only endow the MN with good conductivity but also better mechanical performance. Zhang et al [ 76 ] introduced PEDOT:PSS to γ-polyglutamic acid (PGA) hydrogel, which demonstrated a significant increase in mechanical strength from 43 to 380 kPa, in conductivity from 1.3 to 12.5 S/m and in elongation from 283% to 650%, respectively ( Figure 4 b). Moreover, the conductive hydrogel encapsulated by PDMS as top layer was directly attached onto human skin to form H-TENG, and was demonstrated to be able to communicate Morse code by tapping with fingers.…”

“…Copyright 2020, The Royal Society of Chemistry. ( b ) <i> and <ii> Schematic of the H-TENG, <iii> demonstration of Morse code communication [ 76 ]. Copyright 2022, Elsevier.…”

A highly aligned microgrid structure for wearable nanofibrous sensors with an enhanced sensitivity and detection range

“…Current existing active constituents of PPS are mostly fabricated via either a hybrid or coating method to integrate the conductive fillers with an elastic matrix. [9][10][11] Considering that the unpretentious working mechanism that generated the resistance response relies on the destruction and reconstruction of a continuous conductive network, 12,13 this indirect variation (stimulideformation-conductive path-resistance) is unreliable in contrast to the piezocapacitive (stimuli-deformation-capacitance) [14][15][16] and piezoelectric (stimuli-charge transfer-current) [17][18][19] role. Thus, it always suffers from a poor signal-noise ratio and lowing gauge factor (GF), especially under small force stimuli (o100 Pa), which may be the crucial features for broadening its applications.…”

A breathable and reliable thermoplastic polyurethane/Ag@K2Ti4O9 composite film with an asymmetrical porous structure for wearable piezoresistive sensors

“…Various flexible electronic devices as ubiquitous peculiarities of modern electronic society have been applied in health monitoring, human-computer interactions, and personal information managements. 1–7 It has been considered that high-cost performance, simple processing strategy and strong environmental adaptability make traditional piezoresistive sensors active in the forefront. However, their poor signal-to-noise ratio and gauge factor (GF) compared to capacitive and piezoelectric models are still key challenges that prevent them from being used on a broader platform.…”