Effect of the polyimide concentration on the memory stability of the silica-nanoparticle-doped hybrid aligned nematic cell

Chi-Yen Huang, Jian Hong Chen, Chia Ting Hsieh, Heng Cheng Song, Yu-Wu Wang, Lance Horng, Yu-Tai Shih, Shug June Hwang

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We investigate the stability of the memory state of the silica-nanoparticle-doped hybrid aligned nematic (SN-HAN) cell. The memory stability of the cell is attributed to the employed planar substrate, which is coated with a homogeneous polyimide (H-PI) film. A H-PI film with a low H-PI solid concentration gives the cell high memory stability. This is because the low H-PI solid concentration causes the film to have a high polar surface energy, trapping polar silica nanoparticles on the planar substrate tightly. The low H-PI solid concentration also gives the substrate a bumpy surface, which has a large surface area for trapping silica nanoparticles.

Original languageEnglish
Article number021702
JournalJapanese Journal of Applied Physics
Issue number2
Publication statusPublished - 2011 Feb 1


All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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