Principles of long-term fluids handling in paper-based wearables with capillary-evaporative transport

Copyright © 2020 Author(s)..

We construct and investigate paper-based microfluidic devices, which model long-term fluid harvesting, transport, sensing, and analysis in new wearables for sweat analysis. Such devices can continuously wick fluid mimicking sweat and dispose of it on evaporation pads. We characterize and analyze how the action of capillarity and evaporation can cooperatively be used to transport and process sweat mimics containing dissolved salts and model analytes. The results point out that non-invasive osmotic extraction combined with paper microfluidics and evaporative disposal can enable sweat collection and monitoring for durations longer than 10 days. We model the fluid flow in the new capillary-evaporative devices and identify the parameters enabling their long-term operation. We show that the transport rates are sufficiently large to handle natural sweat rates, while we envision that such handling can be interfaced with osmotic harvesting of sweat, a concept that we demonstrated recently. Finally, we illustrate that the salt film deposited at the evaporation pad would eventually lead to cessation of the process but at the same time will preserve a record of analytes that may be used for long-term biomarker monitoring in sweat. These principles can be implemented in future platforms for wearable skin-interfacing assays or electronic biomarker monitors.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:14

Enthalten in:

Biomicrofluidics - 14(2020), 3 vom: 15. Mai, Seite 034112

Sprache:

Englisch

Beteiligte Personen:

Shay, Timothy [VerfasserIn]
Saha, Tamoghna [VerfasserIn]
Dickey, Michael D [VerfasserIn]
Velev, Orlin D [VerfasserIn]

Links:

Volltext

Themen:

Journal Article

Anmerkungen:

Date Revised 28.03.2024

published: Electronic-eCollection

Citation Status PubMed-not-MEDLINE

doi:

10.1063/5.0010417

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM311446930