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1. 兰州理工大学 材料科学与工程学院,甘肃 兰州,730050
2. 省部共建有色金属先进加工与再利用国家重点实验室,甘肃 兰州,730050
3. 中国科学院兰州化学物理研究所 兰州,730000
纸质出版日期:2015-4-3,
收稿日期:2015-1-22,
修回日期:2015-2-17,
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信红强, 侯新刚, 韩修训. 低维MoS<sub>2</sub>混合纳米片的发光特性[J]. 发光学报, 2015,36(4): 419-423
XIN Hong-qiang, HOU Xin-gang, HAN Xiu-xun. Luminescence Properties of Low-dimension MoS<sub>2</sub> Hybrid-nanosheets[J]. Chinese Journal of Luminescence, 2015,36(4): 419-423
信红强, 侯新刚, 韩修训. 低维MoS<sub>2</sub>混合纳米片的发光特性[J]. 发光学报, 2015,36(4): 419-423 DOI: 10.3788/fgxb20153604.0419.
XIN Hong-qiang, HOU Xin-gang, HAN Xiu-xun. Luminescence Properties of Low-dimension MoS<sub>2</sub> Hybrid-nanosheets[J]. Chinese Journal of Luminescence, 2015,36(4): 419-423 DOI: 10.3788/fgxb20153604.0419.
采用液相剥离法剥离MoS
2
块体材料
通过选择合适的剥离剂、超声时间、超声功率得到含有不同尺寸且分散均匀的MoS
2
混合纳米薄片悬浮溶液。在360 nm光激发下
这种悬浮液表现出单层MoS
2
及小尺寸MoS
2
纳米颗粒的复合发光特征。与微机械剥离得到的单层MoS
2
的发光特性相比
这种液相法得到的混合纳米薄片在512 nm处的最强发光峰位发生明显蓝移。混合纳米薄片在横向尺度上所产生的量子限制效应可能是导致该峰位蓝移的主要原因。
By using liquid exfoliation method with sonication in appropriate stripping solvent
ultrasonic time
ultrasonic power
MoS
2
hybrid-nanosheets suspension with different lateral dimension and uniform dispersion nanosheets were obtained. Under 360 nm excitation
the suspension shows both the luminescence properties of monolayer MoS
2
and small MoS
2
nanoparticles. The strongest peak of the sample is centered at 512 nm
and shows obvious blue-shifted compared with that of monolayers MoS
2
exfoliated by the micromechanically cleavage method. The blue-shifted luminescence is mainly caused by the strong quantum confinement effect of the MoS
2
hybrid nanosheets which produced in horizontal dimension as well.
MoS2混合纳米薄片量子限制效应光致发光
MoS2hybrid-nanosheetsquantum confinement effectphotoluminescence
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