Development of an ordered array of optoelectrochemical individually readable sensors with submicrometer dimensions: application to remote electrochemiluminescence imaging.
A novel array of optoelectrochemical submicrometer sensors for remote electrochemiluminescence (ECL) imaging is presented. This device was fabricated by chemical etching of a coherent optical fiber bundle to produce a nanotip array. The surface of the etched bundle was sputter-coated with a thin layer of indium tin oxide in order to create a transparent and electrically conductive surface that is insulated eventually by a new electrophoretic paint except for the apex of the tip. These fabrication steps produced an ordered array of optoelectrochemical sensors with submicrometer dimensions that retains the optical fiber bundle architecture. The electrochemical behavior of the sensor array was independently characterized by cyclic voltammetry and ECL experiments. The steady-state current indicates that the sensors are diffusively independent. This sensor array was further studied with a co-reactant ECL model system, such as Ru(bpy)(3)(2+)/TPrA. We clearly observed an ordered array of individual ECL micrometer spots, which corresponds to the sensor array structure. While the sensors of the array are not individually addressable electrochemically, we could establish that the sensors are optically independent and individually readable. Finally, we show that remote ECL imaging is performed quantitatively through the optoelectrochemical sensor array itself.
Chovin
Arnaud
A
Laboratoire d'Analyse Chimique par Reconnaissance Moléculaire, Université Bordeaux I, ENSCPB, 16 avenue Pey-Berland, 33607 Pessac, France.
Garrigue
Patrick
P
Vinatier
Philippe
P
Sojic
Neso
N
D000465:Algorithms; D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D005336:Fiber Optic Technology; D007091:Image Processing, Computer-Assisted; D008163:Luminescent Measurements; D008832:Microchemistry; D008839:Microelectrodes; D008855:Microscopy, Electron, Scanning; D008856:Microscopy, Fluorescence; D055100:Optical Fibers; D009942:Organometallic Compounds / Q000737:chemistry; D010084:Oxidation-Reduction; D011437:Propylamines / Q000737:chemistry; D017975:Ruthenium Compounds / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry
D009942:Organometallic Compounds; D011437:Propylamines; D017975:Ruthenium Compounds; D013431:Sulfates; D017971:Tin Compounds; C415768:tris(2,2'-bipyridyl)ruthenium(II); C096226:tripropylamine; C012036:sodium sulfate; C031584:hexammineruthenium; C109984:indium tin oxide