Biomedical Microdevices

, 21:72 | Cite as

Fabrication of a polycarbonate microdevice and boronic acid-mediated surface modification for on-chip sample purification and amplification of foodborne pathogens

  • Hoang Chau La
  • Nae Yoon LeeEmail author


In this study, we integrated sample purification and genetic amplification in a seamless polycarbonate microdevice to facilitate foodborne pathogen detection. The sample purification process was realized based on the increased affinity of the boronic acid-modified surface toward the cis-diol group present on the bacterial outer membrane. The modification procedure was conducted at room temperature using disposable syringe. The visible color and fluorescence signals of alizarin red sodium were used to confirm the success of the surface modification process. Escherichia coli O157:H7 containing green fluorescence protein (GFP) and Staphylococcus aureus were chosen as the microbial models to demonstrate the nonspecific immobilization using the microdevice. Bacterial solutions of various concentrations were injected into the microdevice at three flow rates to optimize the operation conditions. This microdevice successfully amplified the 384-bp fragment of the eaeA gene of the captured E. coli O157:H7 within 1 h. Its detection limit for E. coli O157:H7 was determined to be 1 × 103 colony-forming units per milliliter (CFU mL−1). The proposed microdevice serves as a monolithic platform for facile and on-site identification of major foodborne pathogens.


Foodborne pathogens Polycarbonate monolithic microdevice On-chip purification On-chip amplification Formylphenylboronic acid Fuchsin staining 



This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2017R1A2B4008179).

Supplementary material

10544_2019_420_MOESM1_ESM.docx (1.7 mb)
ESM 1 (DOCX 1.66 MB)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of BioNano TechnologyGachon UniversitySeongnam-siSouth Korea

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