Bio-inspired hierarchical wearable patch for fast sweat collection.
Biosens Bioelectron
; 260: 116430, 2024 Sep 15.
Article
in En
| MEDLINE
| ID: mdl-38815465
ABSTRACT
Sweat contains abundant physiological and metabolic data to evaluate an individual's physical health. Since the non-exercise sweat secretion rate is low, with an average value of 1-10 µl h-1 cm-2, sweat is generally collected during exercise for existing wearable sweat sensors. To expand their applications to include daily scenarios, these sensors developed for sports and fitness are challenged by the difficulty of collecting trace amounts of sweat. This study proposes a wearable patch inspired by the hierarchical structure of Sarracenia trichomes, allowing for the spontaneous and fast collection of a small amount of secreted sweat. The patch contains microfluidic channels featuring a 20 µm-wide rib structure, fully utilizing the capillary force, thereby eliminating the issue of sweat hysteresis. Furthermore, with only 0.5 µl of the sweat secreted at the collection site, it can converge on the detection medium located within the center reservoir. Volunteer verification demonstrated a twofold increase in sweat collection efficiency compared to traditional wearable patches. This patch serves as an efficient sweat-collection configuration, promising potential for diverse in situ sweat colorimetric analyses.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sweat
/
Biosensing Techniques
/
Equipment Design
/
Wearable Electronic Devices
Limits:
Humans
Language:
En
Journal:
Biosens Bioelectron
Journal subject:
BIOTECNOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
China
Country of publication:
Reino Unido