Abstract |
It is tremendously desirable for the timely and effective detection of cancer to facilitate the ultra-highly sensitive monitoring of tumor marker in clinical serum sample. In this study, an electromagnetic and chemical synergistically enabled recyclable immunoassay based on surface-enhanced Raman scattering (SERS) was proposed by realizing the anisotropic growth of sea-urchin-like gold nanoflowers (Au NFs) on two-dimensional red phosphorus (RP) nanoplates. Besides the achieved enhancement factor as high as 2.24 × 106, it was found that the photocatalytic and SERS activities were kept at a high level for the hybrid substrate of RP/Au NFs throughout 7 cycles of immunoassay. In combination with a non-metallic immunoprobe, the limit of detection was drove to 7.41 × 10-5 IU·mL-1 for cancer antigen 19-9. The comparative experiments of nonspecific monitoring verified the promising selectivity of this strategy. Considering the intriguing features of high sensitivity, recyclability, and specificity, the proposed multifunctional RP/Au NFs exhibited its superior role in the early detection of cancer and can be adapted for point-of-care diagnosis.
|
Authors | Xiuting Li, Jiali Ma, Yongling Zhang, Lanxin Xu, Chenjie Gu, Guodong Wei, Xiaoling Zhang, Tao Jiang, Jun Zhou |
Journal | Biosensors & bioelectronics
(Biosens Bioelectron)
Vol. 207
Pg. 114148
(Jul 01 2022)
ISSN: 1873-4235 [Electronic] England |
PMID | 35286945
(Publication Type: Journal Article)
|
Copyright | Copyright © 2022 Elsevier B.V. All rights reserved. |
Chemical References |
- CA-19-9 Antigen
- Phosphorus
- Gold
|
Topics |
- Biosensing Techniques
- CA-19-9 Antigen
- Gold
- Immunoassay
(methods)
- Metal Nanoparticles
- Phosphorus
- Spectrum Analysis, Raman
(methods)
|