@article {Kololuoma2015,
	title = {{Gravure printed sol{\textendash}gel derived AlOOH hybrid nanocomposite thin films for printed electronics}},
	journal = {J. Mater. Chem. C},
	volume = {3},
	number = {8},
	year = {2015},
	note = {n/a},
	pages = {1776{\textendash}1786},
	abstract = {<p>We report a sol-gel approach to fabricate aluminum-oxy-hydroxide (AlOOH) -based inks for gravure printing of high-dielectric-constant nanocomposite films. By reacting 3-glycidoxypropyl- trimethoxysilane (GPTS) with aluminum-oxide-hydroxide (AlOOH) nanoparticles under constant bead milling, inks suitable for gravure printing were obtained. The calculated relative dielectric constant based on measured capacitances and film thicknesses for the gravure-printed GPTS:AlOOH nanocomposite varied between 7 and 11 at a 10 kHz frequency. The dielectric constant depended on the mixing ratio of the composite and was found to follow the Maxwell-Garnett ternary-system mixing rule indicating presence of micro/nanopores that affect the electrical properties of the fabricated films. Increasing leakage current with increasing AlOOH content was observed. High leakage current was reduced by printing two-layer films. The double-layered gravure-coated films exhibited similar capacitance density but clearly lower leakage current and less electrical breakdowns in comparison to single-layered films having comparable film compositions and film thicknesses. The best composite yielded a capacitance density of 109 {\textpm} 2 pF/mm2 at the 10 kHz frequency and a leakage current density of 60 {\textpm} 20 {\textmu}A/cm2 at 0.5 MV/cm electric field as a single layer. The calculated relative dielectric constant at the 10 kHz frequency for this composition was 11.2 {\textpm} 0.5. Introduction</p>
},
	isbn = {8643185698},
	issn = {2050-7526},
	doi = {10.1039/C4TC02022G},
	url = {http://xlink.rsc.org/?DOI=C4TC02022G},
	author = {Kololuoma, Terho and Lepp{\"a}niemi, Jaakko and Majumdar, Himadri and Branquinho, Rita and Herbei-Valcu, Elena and Musat, Viorica and Martins, Rodrigo and Fortunato, Elvira and Alastalo, Ari}
}
