The team had developed a new synthetic route for the preparation of metal hydroxide-based nanofluids. Their nanofluid system has high stability and remarkable thermal conductivity. After investigating its nonlinear optical (NLO) properties, they found that the nonlinear phase can be reversibly switched from positive Z-scan (convex lens) to negative Z-scan (concave lens) as the laser power is tuned from 500 mW to 1000 mW. Here ‘‘liquid’’ nanofluidic optical switching materials demonstrate superior degree of flexibility for these applications, while functioning at relatively low-power (green laser).
Congratulations Prof. Saidur and team!