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Fully Inkjet-Printed Paper-Based Potentiometric Ion-Sensing Devices
Analytical Chemistry ( IF 6.7 ) Pub Date : 2017-09-11 00:00:00 , DOI: 10.1021/acs.analchem.7b03177
Nipapan Ruecha 1 , Orawon Chailapakul 2 , Koji Suzuki 1 , Daniel Citterio 1
Affiliation  

A fully inkjet-printed disposable and low cost paper-based device for potentiometric Na+- or K+-ion sensing has been developed. A printed ionophore-based all-solid-state ion selective electrode on a graphene/poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (G/PEDOT:PSS) nanocomposite solid contact and a printed all-solid state reference electrode consisting of a pseudosilver/silver chloride electrode coated by a lipophilic salt-incorporating poly(vinyl chloride) membrane overprinted with potassium chloride have been combined on a microfluidically patterned paper substrate. Devices are built on standard filter paper using off-the-shelf materials. Ion sensing has been achieved within 180 s by simple addition of 20 μL of sample solution without electrode preconditioning. The limits of detection were 32 and 101 μM for Na+ and K+, respectively. The individual single-use sensing devices showed near Nernstian response of 62.5 ± 2.1 mV/decade (Na+) and 62.9 ± 1.1 mV/decade (K+) with excellent standard potential (E0) reproducibilities of 455.7 ± 5.1 mV (Na+) and 433.9 ± 2.8 mV (K+). The current work demonstrates the promising possibility of obtaining low-cost and disposable paper-based potentiometric sensing devices potentially manufacturable at large scales with industrial inkjet printing technology.

中文翻译:

全喷墨打印纸基电位离子传感设备

完全喷墨打印的一次性低成本纸质设备,用于电位计Na + -或K +已经开发出离子感测。石墨烯/聚(3,4-乙撑二氧噻吩)聚苯乙烯磺酸盐(G / PEDOT:PSS)纳米复合固体触点上的基于印刷离子载体的全固态离子选择电极和由伪银/已经在微流控图案化的纸质基材上组合了用涂有氯化钾的亲脂性盐结合的聚氯乙烯膜涂覆的氯化银电极。设备使用现成的材料在标准滤纸上构建。通过在不进行电极预处理的情况下简单添加20μL样品溶液,即可在180 s内实现离子感测。Na +和K +的检出限分别为32和101μM, 分别。单个的一次性使用的传感设备显示出接近Nernstian的响应,分别为62.5±2.1 mV /十倍(Na +)和62.9±1.1 mV /十倍(K +),具有出色的标准电势(E 0)重现性,为455.7±5.1 mV(Na +)。)和433.9±2.8 mV(K +)。当前的工作证明了获得低成本和一次性的纸基电位计传感设备的潜在可能性,该设备可以通过工业喷墨印刷技术大规模生产。
更新日期:2017-09-11
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