caa a22 4500 445879521 CHVBK 20180317145538.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00604-010-0494-y doi (NATIONALLICENCE)springer-10.1007/s00604-010-0494-y Core-shell fluorescent silica nanoparticles for sensing near-neutral pH values [Elektronische Daten] [Feng Gao, Xiaoxiao Chen, Qingqing Ye, Zhen Yao, Xinyin Guo, Lun Wang] pH-responsive fluorescent core-shell silica nanoparticles (SiNPs) were prepared by encapsulating the pH-sensitive fluorophore 8-hydroxypyrene-1,3, 6-trisulfonate into their silica shell via a facile reverse microemulsion method. The resulting SiNPs were characterized by SEM, TEM, fluorescence lifetime spectroscopy, photobleaching experiments, and photoluminescence. The core-shell structure endows the SiNPs with reduced photobleaching, excellent photostability, minimized solvatachromic shift, and increased fluorescence efficiency compared to the free fluorophore in aqueous solution. The dynamic range for sensing pH ranges from 5.5 to 9.0. The nanosensors show excellent stability, are highly reproducible, and enable rapid detection of pH. The results obtained with the SiNPs are in good agreement with data obtained with a glass electrode. Figure Single-nanoparticle laboratories: core-shell silica fluorescent nanoparticles for pH sensing Springer-Verlag, 2010 Water-in-oil microemulsion nationallicence Fluorescent core-shell silica nanoparticles nationallicence pH sensing nationallicence Single-particle laboratories nationallicence Gao Feng Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut Chen Xiaoxiao Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut Ye Qingqing Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut Yao Zhen Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut Guo Xinyin Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut Wang Lun Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut Microchimica Acta Springer Vienna 172/3-4(2011-03-01), 327-333 0026-3672 172:3-4<327 2011 172 604 https://doi.org/10.1007/s00604-010-0494-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-010-0494-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gao Feng Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut NATIONALLICENCE 700 1- Chen Xiaoxiao Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut NATIONALLICENCE 700 1- Ye Qingqing Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut NATIONALLICENCE 700 1- Yao Zhen Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut NATIONALLICENCE 700 1- Guo Xinyin Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut NATIONALLICENCE 700 1- Wang Lun Anhui Key Laboratory of Chemo/Biosensing, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, 241000, Wuhu, China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 172/3-4(2011-03-01), 327-333 0026-3672 172:3-4<327 2011 172 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer