Direct synthesis of nanodiamonds by femtosecond laser irradiation of ethanol.
Direct synthesis of nanodiamonds by femtosecond laser irradiation of ethanol.
复制标题
DOI：
10.1038/srep33966
复制
发表时间：
2016-09-23
影响因子：
4.6
通讯作者：
Yap SS
中科院分区：
文献类型：
--
作者：
Nee CH;Yap SL;Tou TY;Chang HC;Yap SS
碳纳米材料表现出新的特性，包括增强的热，电，机械和生物性能。纳米金刚石;首先在陨石中发现，被发现具有生物相容性，无毒，并具有独特的光学特性。在这里，我们表明，通过1025 nm飞秒激光照射，直接从乙醇中形成尺寸<5 nm的纳米金刚石。乙醇对飞秒激光能量的吸收在100 μJ以上呈非线性增加，并伴随着飞秒激光照射产生的白色连续光。当激光能量大于300 μJ时，在等离子体中检测到C、O和H的发射光谱，表明C_2H_5OH发生了解离。碳物质在激光丝内的受限等离子体中的成核导致纳米金刚石的形成。讨论了非线性现象对均匀纳米金刚石形成的能量依赖性和作用。这项工作为基于纳米和超快激光物理的自底向上纳米材料合成提供了新的可能性。
Carbon nanomaterials exhibit novel characteristics including enhanced thermal, electrical, mechanical, and biological properties. Nanodiamonds; first discovered in meteorites are found to be biocompatible, non-toxic and have distinct optical properties. Here we show that nanodiamonds with the size of <5 nm are formed directly from ethanol via 1025 nm femtosecond laser irradiation. The absorption of laser energy by ethanol increased non-linearly above 100 μJ accompanied by a white light continuum arises from fs laser filamentation. At laser energy higher than 300 μJ, emission spectra of C, O and H in the plasma were detected, indicating the dissociation of C2H5OH. Nucleation of the carbon species in the confined plasma within the laser filaments leads to the formation of nanodiamonds. The energy dependence and the roles of the nonlinear phenomenon to the formation of homogeneous nanodiamonds are discussed. This work brings new possibility for bottom-up nanomaterials synthesis based on nano and ultrafast laser physics.
登录
查看更多内容
影响因子：
38.3
作者：
Chang, Yi-Ren;Lee, Hsu-Yang;Fann, Wunshain
通讯作者：
Fann, Wunshain
影响因子：
4.4
作者：
Barnard, AS;Russo, SP;Snook, IK
通讯作者：
Snook, IK
影响因子：
3.7
作者：
Petit, Tristan;Arnault, Jean-Charles;Bergonzo, Philippe
通讯作者：
Bergonzo, Philippe
影响因子：
2.8
作者：
Kedenburg, S.;Vieweg, M.;Giessen, H.
通讯作者：
Giessen, H.
影响因子：
17.1
作者：
Chow, Edward K.;Zhang, Xue-Qing;Ho, Dean
通讯作者：
Ho, Dean