Credit: Applied Physics Letters 110, 033503 (2017)
Shahrjerdi and his team fabricated top-gated field-effect transistors (FETs)—devices that utilize a small voltage to control current—on as-grown and superacid-treated molybdenum disulfide films. A schematic of the device is shown in (a). As seen in the graph (b), the chemical treatment (TFSI, red line) improves the electronic properties of the device.