title: Formation of various bicolor fluorescent micropatterns on a single polymer film based on concurrent photobleaching and photobase generation.
abstract: Various bicolored fluorescent micropatterns are fabricated on a single polymer film by concurrent photobleaching and a photobase generation process. A polymer, bearing anthracene and oxime-urethane groups, is dyed with rhodamine B isothiocyanate after irradiation with 310-nm UV light. The photochemical reaction of the polymer is monitored by UV, IR absorption, and fluorescence emission spectroscopy. Differently colored fluorescent micropatterns are obtained by selectively exciting each dye moiety. Various bicolored fluorescent micropatterns are observed through varying the excitation wavelength and observation wavelength ranges using a confocal microscope. This bicolored fluorescence patterning method will be useful to apply in photonic/electronic devices.
authors: Department of Polymer Engineering, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea.
authors: Kyu Ho
authors: KH
authors: Chae
authors: Hak Soo
authors: HS
authors: Kim
mesh_terms: D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry; D038761:Photobleaching; D010777:Photochemistry; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects; D012235:Rhodamines / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D005456:Fluorescent Dyes; D011108:Polymers; D012235:Rhodamines; C027755:rhodamine isothiocyanate
keywords: dyes/pigments; fluorescence; imaging; irradiation; photochemistry