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From bulk to monolayer MoS2 : evolution of Raman scattering

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : From bulk to monolayer MoS2 : evolution of Raman scattering
นักวิจัย : Li, Hong , Zhang, Qing , Yap, Ray Chin Chong , Tay, Beng Kang , Teo, Edwin Hang Tong , Olivier, Aurelien , Baillargeat, Dominique
คำค้น : DRNTU::Engineering::Electrical and electronic engineering.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Li, H., Zhang, Q., Yap, R. C. C., Tay, B. K., Teo, E. H. T., Olivier, A., et al. (2012). From Bulk to Monolayer MoS2: Evolution of Raman Scattering. Advanced Functional Materials, 22(7), 1385-1390. , 1616-3028 , http://hdl.handle.net/10220/10431 , http://dx.doi.org/10.1002/adfm.201102111
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Advanced functional materials
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Molybdenum disulfide (MoS2) is systematically studied using Raman spectroscopy with ultraviolet and visible laser lines. It is shown that only the Raman frequencies of and peaks vary monotonously with the layer number of ultrathin MoS2 flakes, while intensities or widths of the peaks vary arbitrarily. The coupling between electronic transitions and phonons are found to become weaker when the layer number of MoS2 decreases, attributed to the increased electronic transition energies or elongated intralayer atomic bonds in ultrathin MoS2. The asymmetric Raman peak at 454 cm−1, which has been regarded as the overtone of longitudinal optical M phonons in bulk MoS2, is actually a combinational band involving a longitudinal acoustic mode (LA(M)) and an optical mode (). Our findings suggest a clear evolution of the coupling between electronic transition and phonon when MoS2 is scaled down from three- to two-dimensional geometry.

บรรณานุกรม :
Li, Hong , Zhang, Qing , Yap, Ray Chin Chong , Tay, Beng Kang , Teo, Edwin Hang Tong , Olivier, Aurelien , Baillargeat, Dominique . (2555). From bulk to monolayer MoS2 : evolution of Raman scattering.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, Hong , Zhang, Qing , Yap, Ray Chin Chong , Tay, Beng Kang , Teo, Edwin Hang Tong , Olivier, Aurelien , Baillargeat, Dominique . 2555. "From bulk to monolayer MoS2 : evolution of Raman scattering".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, Hong , Zhang, Qing , Yap, Ray Chin Chong , Tay, Beng Kang , Teo, Edwin Hang Tong , Olivier, Aurelien , Baillargeat, Dominique . "From bulk to monolayer MoS2 : evolution of Raman scattering."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Li, Hong , Zhang, Qing , Yap, Ray Chin Chong , Tay, Beng Kang , Teo, Edwin Hang Tong , Olivier, Aurelien , Baillargeat, Dominique . From bulk to monolayer MoS2 : evolution of Raman scattering. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.