TY - JOUR
T1 - Development of UV-curable liquid for in-liquid fluorescence alignment in ultraviolet nanoimprint lithography
AU - Ochiai, Kento
AU - Kikuchi, Eri
AU - Ishito, Yota
AU - Kumagai, Mari
AU - Nakamura, Takahiro
AU - Nakagawa, Masaru
N1 - Publisher Copyright:
© 2018 The Japan Society of Applied Physics.
PY - 2018/6
Y1 - 2018/6
N2 - We studied a fluorescent UV-curable resin suitable for fluorescence alignment in UV nanoimprinting. The addition of a cationic fluorescent dye caused radical photopolymerization of a UV-curable resin by exposure to visible excitation light for fluorescence microscope observation. The microscope observation of a resin film prepared by pressing resin droplets on a silica substrate with a fluorinated silica superstrate revealed that the cationic dye molecules were preferably adsorbed onto the silica surface. It was indicated that the dye molecules concentrated on the silica surface may cause the photocuring. A nonionic fluorescent dye was selected owing to its low polar symmetrical structure and its solubility parameter close to monomers. The fluorescent UV-curable resin with the nonionic dye showed uncured stability to exposure to visible excitation light for 30 min with a light intensity of 8.5mWcm-2 detected at 530 nm.
AB - We studied a fluorescent UV-curable resin suitable for fluorescence alignment in UV nanoimprinting. The addition of a cationic fluorescent dye caused radical photopolymerization of a UV-curable resin by exposure to visible excitation light for fluorescence microscope observation. The microscope observation of a resin film prepared by pressing resin droplets on a silica substrate with a fluorinated silica superstrate revealed that the cationic dye molecules were preferably adsorbed onto the silica surface. It was indicated that the dye molecules concentrated on the silica surface may cause the photocuring. A nonionic fluorescent dye was selected owing to its low polar symmetrical structure and its solubility parameter close to monomers. The fluorescent UV-curable resin with the nonionic dye showed uncured stability to exposure to visible excitation light for 30 min with a light intensity of 8.5mWcm-2 detected at 530 nm.
UR - http://www.scopus.com/inward/record.url?scp=85047945441&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047945441&partnerID=8YFLogxK
U2 - 10.7567/JJAP.57.06HG02
DO - 10.7567/JJAP.57.06HG02
M3 - Article
AN - SCOPUS:85047945441
VL - 57
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 6
M1 - 06HG02
ER -