Assembly of mesoporous indium tin oxide electrodes from nano-hydroxide building blocks

0384098 - ÚFCH JH 2013 RIV GB eng J - Článek v odborném periodiku
Liu, Y. - Štefanić, G. - Rathouský, Jiří - Hayden, O. - Bein, T. - Fattakhova-Rohlfing, D.
Assembly of mesoporous indium tin oxide electrodes from nano-hydroxide building blocks.
Chemical Science. Roč. 3, č. 7 (2012), s. 2367-2374. ISSN 2041-6520. E-ISSN 2041-6539
Grant CEP: GA ČR GA104/08/0435
Výzkumný záměr: CEZ:AV0Z40400503
Klíčová slova: transparent conducting films * electrical conductivity * thin films
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 8.314, rok: 2012

We describe the elaboration of nanostructured transparent conducting indium tin oxide (ITO) materials that is based on controlled self-assembly of ultra-small indium tin hydroxide nanoparticles. We developed a strategy for preparing nanosized, nearly spherical and highly dispersible nanoparticles of indium tin hydroxide ("nano-hydroxides"), which can be assembled into regular mesoporous architectures directed by a commercially available Pluronic polymer. The assembled structures are easily transformed into conducting crystalline mesoporous ITO films by a mild heat treatment at 300 degrees C. The resulting ITO layers feature a regular mesoporosity with a mesostructure periodicity of about 13 +/- 2 nm, high surface area of 190 m(2) cm(-3), porosity of 44% and electrical conductivity up to 9.5 S cm(-1). The ITO films can accommodate large amounts of redox-active molecules and serve as efficient conducting electrodes with a very high surface area. The perfect dispersibility of nano-hydroxides without any stabilizing agents, their preferential interaction with the hydrophilic part of amphiphilic molecules leading to their self-assembly, and a facile transformation of the assembled nano-hydroxides into crystalline ITO with similar morphology make the nano-hydroxides very attractive building blocks for the elaboration of nanostructured ITO materials. We believe that the nano-hydroxides can become universal building blocks for the fabrication of crystalline ITO materials with arbitrary nanomorphologies.
Trvalý link: http://hdl.handle.net/11104/0213845