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Through employing a cost-effective solvothermal method, ultrathin topological insulator (TI) bismuth telluride $(\hbox{Bi}_{2}\hbox{Te}_{3})$ nanosheets with uniform hexagonal nanostructures had been synthesized. Thanks to the uniformity of few-layer TI dispersion, we are able to adopt the drop-casting approach in order to directly transfer few-layer TI and, therefore, form a self-assembled uniform...
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