Abstract
A polymer film containing the photo-acid generator, 1,2-naphthoquinone-2-diazido-5-sulfonic acid sodium salt (SNQD), and a fluorescence pH indicator, seminaphthofluorescein (SNAFL-1), has been used as a near-field write-once memory medium. Near-field 455 nm light from a optical fiber tip with a nano-size (∼ 100 nm) aperture produced acids in a small area and the acids were detected as the fluorescence intensity increased with the near-field 488 nm excitation light. The fluorescent spot-size was as small as 160 nm and could be read many times without destruction.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
