A taper-in-taper fiber optic biosensor based on Mach-Zehnder interferometer for human sweat pH detection

Zhengyi Ma; Qianqian Zhang; Chi Chiu Chan

doi:10.1117/12.2588587

18 March 2021 A taper-in-taper fiber optic biosensor based on Mach-Zehnder interferometer for human sweat pH detection

Zhengyi Ma, Qianqian Zhang, Chi Chiu Chan

Proceedings Volume 11780, Global Intelligent Industry Conference 2020; 1178004 (2021) https://doi.org/10.1117/12.2588587
Event: Global Intelligent Industry Conference 2020, 2020, Guangzhou, China

Abstract

Human sweat is mainly composed of water and small amounts of electrolytes (e.g. sodium, chloride, potassium, calcium), metabolites, amino acid and proteins. Variation of the pH value in sweat is closely associated with the health status of person that can indicate disease and metabolic activity. This study demonstrates a newly developed wearable sensor based on taper-in-taper structure for sweat pH detection with high sensitivity. To fabricate this biosensor, the pH sensitive PVA-PAA hydrogel layer (polyvinyl alcohol-polyacrylic acid) and pH sensitive indicator MO (Methyl Orange) are combined to be a coating layer of optical fiber with a three-dimensional network porous structure. The proposed optical biosensor in taper-in-taper structure for human sweat pH monitoring is demonstrated to have high sensitivity, wide dynamic range and short time response, which also present excellent long-term stability and durability that can be potentially applied in high-performance smart wearable device for health management.

Citation Download Citation

Zhengyi Ma, Qianqian Zhang, and Chi Chiu Chan "A taper-in-taper fiber optic biosensor based on Mach-Zehnder interferometer for human sweat pH detection", Proc. SPIE 11780, Global Intelligent Industry Conference 2020, 1178004 (18 March 2021); https://doi.org/10.1117/12.2588587

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available