Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2019 Dec 30;9:20286. doi: 10.1038/s41598-019-56105-7

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Graphene protected Cu SPR biosensing of HT-2. (a,b) Ellipsometric parameters ψ (amplitude) and Δ (phase) of the SPR curve of functionalized SLG protected Cu chips at 717.32, 747.40 and 793.26 nm, as a function of time when the sensor chip reacts with HT-2. The pumping time of PBS is~4.5 mins. The inset in (a) shows the molecular structure of HT-2. (c,d) SPR spectral curves after reacting with different concentrations of HT-2 in PBS. (e,f) The shift of resonant wavelength (δλ) for ψ and the change of phase (δΔ) as a function of logarithm of concentration, n, of HT-2. The dark dashed line shows the sigmoidal fit of δλ as a function of log(n), and the red dashed line is the same for δΔ, giving n_H = 0.2 ± 0.01 and K_H > 1 µg/mL. The top inset schematically describes the protocol of SLG functionalization for HT-2 bio-sensing.