Abstract
Drying mediated self-aggregation patterns of CdTe colloidal QDs through simple evaporation method was reported. Thioglycolic acid (TGA) capped CdTe QDs were prepared in aqueous phase through colloidal route and their structural, optical and morphological behaviors were studied. The drying patterns of CdTe QDs were fabricated under a constant evaporation rate. The coffee ring effect and the drying pattern formations were studied for the TGA capped CdTe colloidal QDs suspension in an aqueous medium. The structural behavior of the CdTe QDs and the drying patterns were revealed by the X-ray diffraction analysis. The size-tunable optical properties of the prepared CdTe QDs were studied by the optical absorption and emission spectroscopy. The capping effects of TGA on CdTe QDs were confirmed by the FT-IR analysis. The surface morphology of the TGA capped CdTe QDs and the drying mediated aggregation patterns of CdTe colloidal suspension were studied by the scanning electron microscopy analysis. The drying mediated patterns from the evaporation technique were suggested as a simple technique for the fabrication of molecular devices.
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