pH sensor based on upconverting luminescent lanthanide nanorods

Sun, Lining; Peng, Hongshang; Stich, Matthias I. J.; Achatz, Daniela E.; Wolfbeis, Otto S.

doi:10.1039/b907822c

Cited by 183 publications

(126 citation statements)

References 24 publications

(12 reference statements)

Supporting

Mentioning

122

Contrasting

Unclassified

Order By: Relevance

“…Thus, new applications have been forthcoming, particularly for nanomaterials, such as pH sensing [106], security devices [107] and cell-imaging [108,109]. Some reviews have described the upconversion phenomena in detail [110][111][112][113][114], and a tutorial review has been given for lanthanide-doped upconversion nanocrystals [115].…”

Section: Upconversion Luminescence In Solidsmentioning

confidence: 98%

Lanthanide Luminescence in Solids

Tanner

2010

Springer Series on Fluorescence

View full text Add to dashboard Cite

A tutorial introduction to the spectra of lanthanide ions is given. The chapter begins with a brief comparison of luminescence of lanthanide ions (Ln 3+ ) in the solid, liquid, and gas phases. Then a description of the importance of nonradiative versus radiative processes is made. The various types of transition of lanthanide ions encountered are then introduced: 4f N -4f N ; 4f N -4f NÀ1 5d; charge transfer; host band-to-band; and defect site or impurity transitions. Reference is briefly made to the spectra of dipositive ions. The luminescence of lanthanide ions in non-lanthanide hosts is examined, and the importance of locating the relative positions of Ln 3+ energy levels relative to the host band gap is stressed. Some of the various upconversion phenomena, including second harmonic generation, twophoton absorption, ground state/excited state absorption, energy transfer upconversion, and photon avalanche, are then described with reference to Ln 3+ and Ln 3+ -TM n+ (transition metal) systems. The experimental distinctions of which particular process is operative in a given system are explained by considering the power, concentration, and lifetime dependences, and the upconversion excitation spectrum. Some applications of lanthanide luminescence are briefly reviewed and a mention of the luminescence in nanomaterials is also included.

show abstract

Section: Upconversion Luminescence In Solidsmentioning

confidence: 98%

Lanthanide Luminescence in Solids

Tanner

2010

Springer Series on Fluorescence

View full text Add to dashboard Cite

show abstract

“…By introduction of bromothymol blue as pH indicator and Nile Red/coumarin 6 as ratiometric FRET pair, Peng et al developed a polyurethane ratiometric fluorescent nanogel, capable of sensing pH values in the physiological range [68]. To further perform pH measurements in even strongly colored biomatters and in deeper regions of tissue, NaYF 4 : Er,Yb upconversion nanomaterials based hydrogel has been constructed, which allows the use of NIR light for photoexcitation and the detection of visible luminescence [69]. These studies are revealing the long term and dynamic imaging for future applications of fluorescent NPs for pH sensing.…”

Section: Fluorescent Nanoparticles For Sensing 41 Ph Sensorsmentioning

confidence: 98%

Fluorescent nanoparticles for chemical and biological sensing

Liu

Yang

et al. 2011

Sci. China Chem.

View full text Add to dashboard Cite

Fluorescent nanoparticles (NPs), including quantum dots (QDs), dye-doped NPs, and rare earth-based NPs, etc., have been a major focus of research and development during the past decade. The impetus behind such endeavors can be attributed to their unique chemical and optical properties, such as bright fluorescence, high photostability, large Stocks shift and flexible processability. The introduction of fluorescent NPs into analytical chemistry has opened up new venues for fluorescent analysis. In this review, we focus on the developments and analytical applications of fluorescent NPs in the chemical and biological sensing of pH, ions, organic compounds, small biological molecules, nucleic acids, proteins, virus and bacteria. The review also points out the in vitro and in vivo imaging application of fluorescent NPs at the cell and body levels. Meanwhile, the advantages of NPs brought field of sensing and signal transductions are also discussed. fluorescence, sensing, quantum dots, dye-doped nanoparticles, rare earth-based nanoparticles

show abstract

“…UCNPs in Sensorfilmen wurden zur vollständig reversiblen Beobachtung von Ammoniak, [235] Kohlendioxid, [236] Sauerstoff, [237] pH-Wert [238] und Schwermetallionen [66,239] in Echtzeit eingesetzt. UCNPs werden zwar nicht direkt von Analyten beeinflusst, kçnnen aber als Nanolichtquellen fungieren, deren Emission durch einen zugesetzten Indikator verändert wird.…”

Section: Chemische Mehrfachsensorenunclassified

“…Der Abschirm-oder Lçscheffekt des nichtfluoreszierenden Indikators hängt von der Konzentration des Analyten ab. Die vom Analyten abhängige Verringerung der Emission der UCNPs wurde für die Messung von Ammoniak, [235] Kohlendioxid [236] und pH-Wert [238] verwendet. Es ist denkbar, UCNPs mit verschiedenen Emissionsfarben für chemische Mehrfachsensoren zu verwenden.…”

Section: Chemische Mehrfachsensorenunclassified

Photonen aufkonvertierende Nanopartikel zur optischen Codierung und zum Multiplexing von Zellen, Biomolekülen und Mikrosphären

Gorris

Wolfbeis

2013

Angewandte Chemie

Self Cite

View full text Add to dashboard Cite

Photonen aufkonvertierende Nanopartikel (photon upconverting nanoparticles, UCNPs) sind Lanthanoid‐dotierte Nanokristalle, die unter Nahinfrarotanregung sichtbares Licht emittieren (Anti‐Stokes‐Emission). Diese einzigartige optische Eigenschaft schließt Hintergrundfluoreszenz und Lichtstreuung durch biologisches Material aus. Ein weiteres Kennzeichen der UCNPs ist die Emission von mehreren schmalen Emissionslinien, was neue Wege für die optische Codierung bereitet. Eindeutige Emissionssignaturen können erzielt werden, indem man die Mehrfachemission der UCNPs durch die Zusammensetzung der Dotanden oder durch eine Oberflächenmodifikation mit Farbstoffen einstellt. Wenn nur die Intensität einer Emissionslinie justiert wird, während eine weitere Emissionslinie als konstantes Referenzsignal fungiert, können ratiometrische Codes entwickelt werden, die unabhängig von Schwankungen der absoluten Signalintensitäten sind. Die Kombination mehrerer UCNPs, die jeweils durch ihre Kennung aus Emissionslinien eindeutig identifizierbar sind, erhöht den Umfang der Codierungen exponentiell und schafft so die Voraussetzungen zur Steigerung der Mehrfachdetektion von Analyten. Dieser Aufsatz zeigt das Potenzial der UCNPs zur Markierung und Codierung von Biomolekülen, Mikrosphären und sogar ganzen Zellen auf.

show abstract

pH sensor based on upconverting luminescent lanthanide nanorods

Cited by 183 publications

References 24 publications

Lanthanide Luminescence in Solids

Lanthanide Luminescence in Solids

Fluorescent nanoparticles for chemical and biological sensing

Photonen aufkonvertierende Nanopartikel zur optischen Codierung und zum Multiplexing von Zellen, Biomolekülen und Mikrosphären

Contact Info

Product

Resources

About