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Tungsten I 5700Synthesis of Single-Crystalline Potassium-Doped Tungsten Oxide Nanosheets as High-Sensitive Gas Sensors. -Single-crystalline K 0.475 WO 3 nanosheets are synthesized by heating a W foil treated with an aqueous solution of KOH, AIBN, and acetone (610°C, 2 h). The as-grown products are characterized by SEM, EDX, SAED, TEM, and powder XRD. The width of the nanosheets reaches 30 µm and thicknesses of about 80 nm. The as-prepared nanosheets exhibit good stability, high sensitivity, and fast response times to H 2 S, acetone, and other gases, and may have promising applications as gas sensors. -(ZHANG, B.; LIU*, J.; GUAN, S.; WAN, Y.; ZHANG, Y.; CHEN, R.;