Analytical and Bioanalytical Chemistry

, Volume 411, Issue 26, pp 6837–6845 | Cite as

New photothermal immunoassay of human chorionic gonadotropin using Prussian blue nanoparticle-based photothermal conversion

  • Guolin Hong
  • Dongdong Zhang
  • Yinghao He
  • Yuanyuan Yang
  • Ping Chen
  • Huijing Yang
  • Zhiyang Zhou
  • Yinhuan LiuEmail author
  • Yan WangEmail author
Research Paper


A new near-infrared-based photothermal immunosensing strategy was developed for the sensitive and feasible detection of human chorionic gonadotropin (HCG) by use of a Prussian blue nanoparticle-based photothermal conversion system. Prussian blue nanospheres synthesized by the one-pot method were used for the labeling of anti-HCG detection antibody. A sandwich-type immunoreaction was initially conducted on a monoclonal anti-HCG antibody-coated microplate with a nanoparticle-labeled signal antibody. Accompanying formation of the sandwiched immunocomplex, Prussian blue nanospheres caused photothermal conversion under 980-nm laser irradiation, thereby resulting in an increase of the temperature of the detection system measured by a portable digital thermometer. The properties and factors influencing the analytical performance of the photothermal immunoassay were studied in detail. Under the optimal conditions, the Prussian blue nanoparticle-based photothermal immunoassay exhibited good temperature responses relative to target HCG concentrations within the dynamic range of 0.01–100 ng mL-1 at a low detection limit of 5.8 pg mL-1. This system also displayed good anti-interference behavior with regard to other cancer biomarkers, good reproducibility, and relatively long storage stability. The method accuracy was evaluated for analysis of human serum specimens, giving results that matched well with those obtained with a commercial HCG enzyme-linked immunosorbent assay kit. Importantly, this protocol is promising for advanced development of photothermal immunoassays.

Graphical abstract


Photothermal immunoassay Human chorionic gonadotropin Prussian blue photothermal material Photothermal conversion system Protein diagnostics 


Funding information

We sincerely acknowledge the financial support of the National Natural Science Foundation of China (81772287 and 81371902), the Joint Project of Major Diseases in Xiamen City of China (3502Z20179044), and the Natural Science Foundation of Fujian Province, China (2016J01643).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

All procedures performed in studies involving human participants were approved by the First Affiliated Hospital of Xiamen University and Fujian Medical University and in accordance with the ethical standards of the First Affiliated Hospital of Xiamen University and Fujian Medical University ethics committees and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent was obtained from all individual participants included in this study.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Guolin Hong
    • 1
    • 2
  • Dongdong Zhang
    • 1
  • Yinghao He
    • 1
  • Yuanyuan Yang
    • 1
  • Ping Chen
    • 1
  • Huijing Yang
    • 2
  • Zhiyang Zhou
    • 2
  • Yinhuan Liu
    • 3
    Email author
  • Yan Wang
    • 4
    Email author
  1. 1.Department of Laboratory MedicineThe First Affiliated Hospital of Xiamen UniversityXiamenChina
  2. 2.Department of Clinical MedicineFujian Medical UniversityFuzhouChina
  3. 3.Department of Laboratory MedicineFuzhou Second Hospital Affiliated to Xiamen UniversityFuzhouChina
  4. 4.Department of Cardiology, The Affiliated Cardiovascular Hospital of Xiamen UniversityMedical College of Xiamen UniversityXiamenChina

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