Author/Authors :
Van Elshocht، نويسنده , , S and Verbiest، نويسنده , , T and de Schaetzen، نويسنده , , G and Hellemans، نويسنده , , L and Phillips، نويسنده , , K.E.S and Nuckolls، نويسنده , , C and Katz، نويسنده , , T.J and Persoons، نويسنده , , A، نويسنده ,
Abstract :
In this Letter we describe the effect of heating on the quality, morphology and nonlinear optical efficiency of anisotropic Langmuir–Blodgett films composed of a chiral helicenebisquinone derivative. The samples were studied with second harmonic generation (SHG), UV–Vis absorption spectroscopy and atomic force microscopy (AFM). Heating a Langmuir–Blodgett film of a helicenebisquinone derivative improves the film quality (homogeneity, surface smoothness). In addition, it increases the filmʹs anisotropy and, as a consequence doubles its nonlinear optical efficiency.
