A BPLC mixture was prepared using a nematic LC (55.0% of BL006, Dn = 0.289, De = +17.0 purchased from Merck) and chiral dopant (45.0% of R811, HTP of 9.8 13.8 lm1 purchased from Merck) to give a helical pitch
around 160 nm. Lab-synthesized with organo thio-modified AuNR dispersed in dichloromethane (DCM) with size of 10 nm in diameter and 25–30 nm in length according to the information obtained from TEM study (Fig. 5a), was used as a nanoparticle additive.