Sensitive detection of copper ions via ion-responsive fluorescence quenching of engineered porous silicon nanoparticlesopen access
- Authors
- Hwang, Jangsun; Hwang, Mintai P.; Choi, Moonhyun; Seo, Youngmin; Jo, Yeonho; Son, Jaewoo; Hong, Jinkee; Choi, Jonghoon
- Issue Date
- Oct-2016
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- SCIENTIFIC REPORTS, v.6
- Journal Title
- SCIENTIFIC REPORTS
- Volume
- 6
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/6515
- DOI
- 10.1038/srep35565
- ISSN
- 2045-2322
- Abstract
- Heavy metal pollution has been a problem since the advent of modern transportation, which despite efforts to curb emissions, continues to play a critical role in environmental pollution. Copper ions (Cu2+), in particular, are one of the more prevalent metals that have widespread detrimental ramifications. From this perspective, a simple and inexpensive method of detecting Cu2+ at the micromolar level would be highly desirable. In this study, we use porous silicon nanoparticles (NPs), obtained via anodic etching of Si wafers, as a basis for undecylenic acid (UDA)-or acrylic acid (AA)-mediated hydrosilylation. The resulting alkyl-terminated porous silicon nanoparticles (APS NPs) have enhanced fluorescence stability and intensity, and importantly, exhibit [Cu2+]-dependent quenching of fluorescence. After determining various aqueous sensing conditions for Cu2+, we demonstrate the use of APS NPs in two separate applications - a standard well-based paper kit and a portable layer-by-layer stick kit. Collectively, we demonstrate the potential of APS NPs in sensors for the effective detection of Cu2+.
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Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
- College of ICT Engineering > School of Integrative Engineering > 1. Journal Articles
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