期刊
NANO LETTERS
卷 12, 期 11, 页码 5936-5940出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl303358p
关键词
Graphene; graphene layer counting; nonlinear microscopy; optical pulse shaping
类别
资金
- NCI NIH HHS [RC1 CA145105] Funding Source: Medline
Nonlinear optical microscopy based on femtosecond laser spectral reshaping characterized and imaged graphene samples made from different methods, both on slides and in a biological environment. This technique clearly discriminates between graphene flakes with different numbers of layers, and reveals the distinct nonlinear optical properties of reduced graphene oxide as compared to mechanically exfoliated or CVD grown graphene. The nonlinearity makes it applicable to scattering samples (such as tissue), as opposed to previous methods such as transmission. This was demonstrated by high resolution imaging of breast cancer cells incubated with graphene flakes.
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