Premium
Ordered Nanoporous Thin Films by Nanosphere Lithography and Diazonium Electroreduction: Simple Elaboration of Ultra‐Micro‐Electrode Arrays
Author(s) -
Nguyen VanQuynh,
Schaming Delphine,
Tran Dai Lam,
Lacroix JeanChristophe
Publication year - 2016
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600420
Subject(s) - materials science , nanoporous , nanosphere lithography , electrode , nanotechnology , electrochemistry , thin film , indium tin oxide , lithography , polystyrene , microelectrode , spheres , glassy carbon , chemical engineering , optoelectronics , fabrication , polymer , chemistry , composite material , cyclic voltammetry , medicine , alternative medicine , physics , pathology , astronomy , engineering
Highly ordered ultra‐micro‐electrode arrays are obtained using nanosphere lithography combined with electrochemical reduction of an aryl diazonium salt. A template made up of 2D hexagonally close‐packed polystyrene (PS) spheres was first deposited on indium tin oxide or glassy carbon substrates. Then, a thin layer of bisthienylbenzene (BTB) was grafted onto the interstices between the spheres. After dissolution of the PS spheres, the presence of micro‐hole arrays on the substrates was evidenced by atomic force microscopy. The electrochemical response of these micro‐hole arrays was investigated as a function of the size of the spheres used. Depending on their radius and the distance between adjacent holes, they behave as a partially blocked surface or as ultra‐microelectrode arrays (UMEAs).