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The origin of sub-bands in the Raman D-band of graphene

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : The origin of sub-bands in the Raman D-band of graphene
นักวิจัย : Luo, Zhiqiang , Cong, Chunxiao , Zhang, Jun , Xiong, Qihua , Yu, Ting
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Luo, Z., Cong, C., Zhang, J., Xiong, Q., & Yu, T. (2012). The origin of sub-bands in the Raman D-band of graphene. Carbon, 50(11), 4252-4258. , 0008-6223 , http://hdl.handle.net/10220/10809 , http://dx.doi.org/10.1016/j.carbon.2012.05.008
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Carbon
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

In Raman spectroscopy investigations of defective suspended graphene, splitting in the D band is observed. Four double resonance Raman scattering processes: the outer and inner scattering processes, as well as the scattering processes with electrons first scattered by phonons (“phonon-first”) or by defects (“defect-first”), are found to be responsible for these features of the D band. The D sub-bands associated with the outer and inner processes merge with increasing defect concentration. However a Stokes/anti-Stokes Raman study indicates that the splitting of the D band due to the separate “phonon-first” and “defect-first” processes is valid for suspended graphene. For graphene samples on a SiO2/Si substrate, the sub-bands of D band merge due to the increased Raman broadening parameter resulting from the substrate doping. Moreover, the merging of the sub-bands shows excitation energy dependence, which can be understood by considering the energy dependent lifetime and/or scattering rate of photo-excited carriers in the Raman scattering process.

บรรณานุกรม :
Luo, Zhiqiang , Cong, Chunxiao , Zhang, Jun , Xiong, Qihua , Yu, Ting . (2555). The origin of sub-bands in the Raman D-band of graphene.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Luo, Zhiqiang , Cong, Chunxiao , Zhang, Jun , Xiong, Qihua , Yu, Ting . 2555. "The origin of sub-bands in the Raman D-band of graphene".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Luo, Zhiqiang , Cong, Chunxiao , Zhang, Jun , Xiong, Qihua , Yu, Ting . "The origin of sub-bands in the Raman D-band of graphene."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Luo, Zhiqiang , Cong, Chunxiao , Zhang, Jun , Xiong, Qihua , Yu, Ting . The origin of sub-bands in the Raman D-band of graphene. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.