Details

Autor(en) / Beteiligte

• Li, Zedong
• Li, Fei
• Xing, Yue
• Liu, Zhi
• You, Minli
• Li, Yingchun
• Wen, Ting
• Qu, Zhiguo
• Ling Li, Xiao
• Xu, Feng

Titel

Pen-on-paper strategy for point-of-care testing: Rapid prototyping of fully written microfluidic biosensor

Ist Teil von

• Biosensors & bioelectronics, 2017-12, Vol.98, p.478-485

Ort / Verlag

England: Elsevier B.V

Erscheinungsjahr

2017

Quelle

MEDLINE

Beschreibungen/Notizen

• Paper-based microfluidic biosensors have recently attracted increasing attentions in point-of-care testing (POCT) territories benefiting from their affordable, accessible and eco-friendly features, where technologies for fabricating such biosensors are preferred to be equipment free, easy-to-operate and capable of rapid prototyping. In this work, we developed a pen-on-paper (PoP) strategy based on two custom-made pens, i.e., a wax pen and a conductive-ink pen, to fully write paper-based microfluidic biosensors through directly writing both microfluidic channels and electrodes. Particularly, the proposed wax pen is competent to realize one-step fabrication of wax channels on paper, as the melted wax penetrates into paper during writing process without any post-treatments. The practical applications of the fabricated paper-based microfluidic biosensors are demonstrated by both colorimetric detection of Salmonella typhimurium DNA with detection limit of 1nM and electrochemical measurement of glucose with detection limit of 1mM. The developed PoP strategy for making microfluidic biosensors on paper characterized by true simplicity, prominent portability and excellent capability for rapid prototyping shows promising prospect in POCT applications. •A fully written microfluidic biosensor based on a custom-made wax pen and a conductive-ink pen was developed.•One-step fabrication of wax-based microfluidic channels on paper was realized without any post-treatment.•A novel paper “notebook” sensor was firstly created for colorimetric detection of bacteria.•Both paper-based colorimetric and electrochemical platforms were rapidly prototyped through pen-on-paper strategy.