Ditsayut PhokharatkulChanpen KaruwanTanom LomasDuangjai NacaprichaAnurat WisitsoraatAdisorn TuantranontThailand National Electronics and Computer Technology CenterMahidol UniversityFaculty of Pharmacy2018-05-032018-05-032011-06-15Talanta. Vol.84, No.5 (2011), 1390-1395003991402-s2.0-79958133658https://repository.li.mahidol.ac.th/handle/20.500.14594/11712In this work, carbon nanotubes (CNTs) nanoarrays in anodized aluminum oxide (AAO-CNTs) nanopore is integrated on a microfluidic flow injection system for in-channel electrochemical detection of iodide. The device was fabricated from PDMS (polydimethylsiloxane) microchannel bonded on glass substrates that contains three-electrode electrochemical system, including AAO-CNTs as a working electrode, silver as a reference electrode and platinum as an auxiliary electrode. Aluminum, stainless steel catalyst, silve r and platinum layers were sputtered on the glass substrate through shadow masks. Aluminum layer was then anodized by two-step anodization process to form nanopore template. CNTs were then grown in AAO template by thermal chemical vapor deposition. The amperometric detection of iodide was performed in 500-μm-wide and 100-μm-deep microchannels on the microfluidic chip. The influences of flow rate, injection volume and detection potential on the current response were optimized. From experimental results, AAO-CNTs electrode on chip offers higher sensitivity and wider dynamic range than CNTs electrode with no AAO template. © 2011 Elsevier B.V. All rights reserved.Mahidol UniversityChemistryConference PaperSCOPUS10.1016/j.talanta.2011.03.071