Multidomain-Based Responsive Materials with Dual-Mode Optical Readouts
- Authors
- You, Yil-Hwan; Biswas, Aniket; Nagaraja, Ashvin T.; Hwang, Jin-Ha; Cote, Gerard L.; McShane, Michael J.
- Issue Date
- 17-Apr-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- SERS; phosphorescence lifetime; microdomain; hydrogel; multimode sensing
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.11, no.15, pp.14286 - 14295
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 11
- Number
- 15
- Start Page
- 14286
- End Page
- 14295
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/1751
- DOI
- 10.1021/acsami.8b21861
- ISSN
- 1944-8244
- Abstract
- Responsive materials designed to generate signals for both surface-enhanced Raman spectroscopy (SERS) and phosphorescence lifetime-dual-mode-measurements are described. To demonstrate this concept, we incorporated pH-sensitive and oxygen-sensitive microdomains into a single hydrogel that could be interrogated via SERS and phosphorescence lifetime, respectively. Microdomains consisted two populations of discrete microcapsules containing either (1) gold nanoparticles capped with pH-sensitive Raman molecules or (2) oxygen-sensitive benzoporphyrin phosphors. While the microdomain-embedded hydrogels presented an expected background luminescence, the pH-sensitive SERS signal was distinguishable for all tested conditions. Response characteristics of the dual sensor showed no significant difference when compared to standalone single-mode pH and oxygen sensors. In addition, the feasibility of redundant multimode sensing was proven by observing the reaction produced by glucose oxidase chemically cross-linked within the corresponding alginate matrix. Each optical mode showed a signal change proportional to glucose concentration with an opposite signal directionality. These results support the promise of micro-/nanocomposite materials to improve measurement accuracy using intrinsic multimode responses and built-in redundancy, concepts that have broad appeal in the chemical sensing and biosensing fields.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Materials Science and Engineering Major > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.