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Paper-based tuberculosis diagnostic devices with colorimetric gold nanoparticles

Author(s): Tsung-Ting Tsai, Shu-Wei Shen, Chao-Min Cheng and Chien-Fu Chen

Journal: Science and Technology of Advanced Materials
ISSN 1468-6996

Volume: 14;
Issue: 4;
Start page: 044404;
Date: 2013;
Original page

A colorimetric sensing strategy employing gold nanoparticles and a paper assay platform has been developed for tuberculosis diagnosis. Unmodified gold nanoparticles and single-stranded detection oligonucleotides are used to achieve rapid diagnosis without complicated and time-consuming thiolated or other surface-modified probe preparation processes. To eliminate the use of sophisticated equipment for data analysis, the color variance for multiple detection results was simultaneously collected and concentrated on cellulose paper with the data readout transmitted for cloud computing via a smartphone. The results show that the 2.6 nM tuberculosis mycobacterium target sequences extracted from patients can easily be detected, and the turnaround time after the human DNA is extracted from clinical samples was approximately 1 h.
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