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Indium tin oxide (ITO) substrates are chemically modified with bent-shaped molecules and influence of these surface immobilised molecules on the alignment of bulk liquid crystal (LC) samples has been investigated. Bent-core (BC) compounds containing a dimethylchlorosilane moiety at the end of a terminal alkyl chain and a lateral alkyl chain are successfully attached to transparent conducting ITO substrates in an  end-on  ( ITO-BC-t ) and  side-on  ( ITO-BC-l ) oriented fashion to create stable permanent self-assembled BC layers on the substrates. Surface functionalization is thoroughly characterised and aligning ability of these BC-modified ITO substrates for orientation of bulk LC sample is evaluated for nematic phase of both rod-like and BCLC samples. The BC-modified substrates are effective in aligning the rod-like compounds in vertical ( ITO-BC-t ), planar orientations ( ITO-BC-l ) and the BC compounds in homeotropic ( ITO-BC-t ) alignment.

Planar and Vertical Alignment of Rod-like and Bent-core Liquid Crystals Using Functionalized Indium Tin Oxide Substrates