期刊
CURRENT APPLIED PHYSICS
卷 20, 期 1, 页码 71-77出版社
ELSEVIER
DOI: 10.1016/j.cap.2019.10.012
关键词
Raman spectroscopy; Resolution; FWHM; Raman mapping; Rayleigh criterion
资金
- Ministry of Trade, Industry and Energy, Korea [20002242]
- National Research Foundation of Korea [NRF-2019R1A2C1006586]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20002242] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A confocal Raman microscope (CRM) facilitates visualization of the spatial distribution of molecular bonds or phonon modes at the submicron level and has been extensively used in the characterization of nanomaterials and devices. The lateral and axial resolution is a key specification that defines the performance of CRM, however, the interpretation of spatial resolution in the literature is often ambiguous, making it often difficult to directly compare Raman images obtained under different conditions. In this report, a convenient and reliable measurement protocol using dispersed carbon nanotubes and suspended graphene as test specimens is proposed to facilitate the determination of the lateral and axial resolutions of a CRM. Spatial resolution values comparable to the results based on Rayleigh criterion calculations were obtained using Raman mapping images of test specimens. This was achieved without the need for complex deconvolution processes or the consideration of an asymmetric dielectric environment.
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