included therein inkjet printing of the titanium dioxide nano ink enables printing of a minute electrode in addition efficiency of a solar cell may be maximized since occurrence of pattern cracking is minimized application_number US 83154210 A description the advantages features and aspects of the invention will become apparent from the following description of the embodiments with reference to the accompanying drawings which is set forth hereinafter the present invention provides a titanium dioxide nano particle coated with a surface stabilizer by chemical bonding so as to provide good compatibility with an ink composition the surface stabilizer may be represented by any one of chemical formulae 1 to 3 the surface stabilizer has an acid functional group and also has a hydrophobic moiety capable of providing stable dispersion in other materials in chemical formulae 1 to 3 r 1 r 2 and r 3 independently represent hydrogen c 1 c 20 alkyl c 2 c 20 alkenyl c 2 c 20 alkynyl or c 6 c 30 aryl the titanium dioxide nano particle capped with the surface stabilizer may be obtained by reacting the surface stabilizer with titanium isopropoxide a precursor used to prepare a titanium dioxide nano particle the solvent may be an alcohol glycol polyol glycol ether or the like more specifically methanol ethanol propanol isopropanol butanol pentanol haxanol dimethyl sulfoxide dmso dimethylformamide dmf glycerol ethylene glycol ethylene glycol monomethyl ether ethylene glycol monoethyl ether ethylene glycol dimethyl ether ethylene glycol diethyl ether propylene glycol propylene glycol propyl ether etc may be used alone or in combination of two or more thereof the proportion.