The effect of solvent on the optical properties of cyanine dye films

Autor:	Jun-Ping Zhang, Shu-Yun Zhou, Ping Chen, Hayami Masaaki, Okasaki Tsuneki
Rok vydání:	2001
Předmět:	Solvent chemistry.chemical_compound Reflection (mathematics) chemistry Process Chemistry and Technology General Chemical Engineering Analytical chemistry Surface roughness Infrared spectroscopy Surface finish Cyanine Thin film Refractive index
Zdroj:	Dyes and Pigments. 51:93-101
ISSN:	0143-7208
DOI:	10.1016/s0143-7208(01)00061-4
Popis:	In this paper, several cyanine dyes in different solvents were spin-coated onto glass substrates to form thin films. Vis-NIR spectra of reflection of the films were measured and optical constants (complex refraction index) were calculated. It was found the solvents could greatly affect the optical properties of dye films. Atomic force microscopy (AFM) was applied to observe the morphologies of the film surfaces and the results demonstrated that the reflectivity was closely related to the surface roughness of film. High surface roughness has a strong scattering effect on light and will lower the reflectivity. When tetrafluoro-propanol and chloroform were employed as solvents, the surface roughness of the film was low and high reflectivity was reliably obtained.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d21c40c4c89d0e90140fbec66a004c5e https://doi.org/10.1016/s0143-7208(01)00061-4 Zobrazit plný text záznamu Full Text from ScienceDirect