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Mechanical exfoliation and characterization of single- and few-layer nanosheets of WSe2, TaS2, and TaSe2

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Mechanical exfoliation and characterization of single- and few-layer nanosheets of WSe2, TaS2, and TaSe2
นักวิจัย : Li, Hai , Lu, Gang , Wang, Yanlong , Yin, Zongyou , Cong, Chunxiao , He, Qiyuan , Wang, Lu , Ding, Feng , Yu, Ting , Zhang, Hua
คำค้น : DRNTU::Engineering::Materials.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : Li, H., Lu, G., Wang, Y., Yin, Z., Cong, C., He, Q., et al. (2013). Mechanical exfoliation and characterization of single- and few-layer nanosheets of WSe2, TaS2, and TaSe2. Small, 9(11), 1974-1981. , 1613-6810 , http://hdl.handle.net/10220/19029 , http://dx.doi.org/10.1002/smll.201202919
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Small
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Single- and few-layer transition-metal dichalcogenide nanosheets, such as WSe2, TaS2, and TaSe2, are prepared by mechanical exfoliation. A Raman microscope is employed to characterize the single-layer (1L) to quinary-layer (5L) WSe2 nanosheets and WSe2 single crystals with a laser excitation power ranging from 20 μW to 5.1 mW. Typical first-order together with some second-order and combinational Raman modes are observed. A new peak at around 308 cm−1 is observed in WSe2 except for the 1L WSe2, which might arise from interlayer interactions. Red shifting of the A1g mode and the Raman peak around 308 cm−1 is observed from 1L to 5L WSe2. Interestingly, hexagonal- and monoclinic-structured WO3 thin films are obtained during the local oxidation of thinner (1L–3L) and thicker (4L and 5L) WSe2 nanosheets, while laser-burned holes are found during the local oxidation of the WSe2 single crystal. In addition, the characterization of TaS2 and TaSe2 thin layers is also conducted.

บรรณานุกรม :
Li, Hai , Lu, Gang , Wang, Yanlong , Yin, Zongyou , Cong, Chunxiao , He, Qiyuan , Wang, Lu , Ding, Feng , Yu, Ting , Zhang, Hua . (2556). Mechanical exfoliation and characterization of single- and few-layer nanosheets of WSe2, TaS2, and TaSe2.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, Hai , Lu, Gang , Wang, Yanlong , Yin, Zongyou , Cong, Chunxiao , He, Qiyuan , Wang, Lu , Ding, Feng , Yu, Ting , Zhang, Hua . 2556. "Mechanical exfoliation and characterization of single- and few-layer nanosheets of WSe2, TaS2, and TaSe2".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, Hai , Lu, Gang , Wang, Yanlong , Yin, Zongyou , Cong, Chunxiao , He, Qiyuan , Wang, Lu , Ding, Feng , Yu, Ting , Zhang, Hua . "Mechanical exfoliation and characterization of single- and few-layer nanosheets of WSe2, TaS2, and TaSe2."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Li, Hai , Lu, Gang , Wang, Yanlong , Yin, Zongyou , Cong, Chunxiao , He, Qiyuan , Wang, Lu , Ding, Feng , Yu, Ting , Zhang, Hua . Mechanical exfoliation and characterization of single- and few-layer nanosheets of WSe2, TaS2, and TaSe2. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.