Upconverting nanophosphors for various sensing applications
Background: Upconverting nanophosphors (UCNPs) are composed of certain nanosized inorganic host materials doped with specific rare earth ions. They exhibit the phenomenon of photon upconversion, whereby the sequential absorption of two or more low energy photons is followed by luminescent emission o...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-08-01
|
| Series: | Talanta Open |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S266683192400016X |
| _version_ | 1797267153350557696 |
|---|---|
| author | Jitender Kumar Indrajit Roy |
| author_facet | Jitender Kumar Indrajit Roy |
| author_sort | Jitender Kumar |
| collection | DOAJ |
| description | Background: Upconverting nanophosphors (UCNPs) are composed of certain nanosized inorganic host materials doped with specific rare earth ions. They exhibit the phenomenon of photon upconversion, whereby the sequential absorption of two or more low energy photons is followed by luminescent emission of multiple photons with higher energy. In addition, they have other attractive optical features such as NIR-absorption, sharp emission bands, exceptional photostability and high quantum yield. These properties make UCNPs lucrative probes for number of optical applications, such as imaging, sensing and theranostics. Overview: UCNPs have been used as specific and ultrasensitive probes for sensing of variety of analytes, such as gas molecules, metal ions, fine particles, pH and a number of molecules, biochemicals and macromolecules. Their absorption and emission in the NIR range facilitates the background free biosensing in situ, in vitro and in vivo. Their multicoloured emissions allow a suitable emission band to serve as a donor for energy transfer to another attached optical probe, while a separate emission band to serve as an internal reference in ratiometric sensing applications. This comprehensive review provides an in-depth exploration of the versatile applications of UCNPs in the optical sensing of various analytes based on energy transfer mechanisms, with emphasis on the recent developments. . The focus is on synthesizing UCNPs, surface functionalization, and their effective utilization especially in detecting gas molecules, pH changes, ions, free radicals, and disease biomarkers. Through a meticulous examination of the use of UCNPs, this review aims to contribute to a deeper understanding of their potential and pave the way for future advancements and challenges in optical sensing. |
| first_indexed | 2024-04-25T01:12:03Z |
| format | Article |
| id | doaj.art-f4edbd137afa4e4681ba5d879a7573ee |
| institution | Directory Open Access Journal |
| issn | 2666-8319 |
| language | English |
| last_indexed | 2024-04-25T01:12:03Z |
| publishDate | 2024-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Talanta Open |
| spelling | doaj.art-f4edbd137afa4e4681ba5d879a7573ee2024-03-10T05:13:18ZengElsevierTalanta Open2666-83192024-08-019100302Upconverting nanophosphors for various sensing applicationsJitender Kumar0Indrajit Roy1Department of Chemistry, University of Delhi, Delhi-110007, IndiaCorresponding author.; Department of Chemistry, University of Delhi, Delhi-110007, IndiaBackground: Upconverting nanophosphors (UCNPs) are composed of certain nanosized inorganic host materials doped with specific rare earth ions. They exhibit the phenomenon of photon upconversion, whereby the sequential absorption of two or more low energy photons is followed by luminescent emission of multiple photons with higher energy. In addition, they have other attractive optical features such as NIR-absorption, sharp emission bands, exceptional photostability and high quantum yield. These properties make UCNPs lucrative probes for number of optical applications, such as imaging, sensing and theranostics. Overview: UCNPs have been used as specific and ultrasensitive probes for sensing of variety of analytes, such as gas molecules, metal ions, fine particles, pH and a number of molecules, biochemicals and macromolecules. Their absorption and emission in the NIR range facilitates the background free biosensing in situ, in vitro and in vivo. Their multicoloured emissions allow a suitable emission band to serve as a donor for energy transfer to another attached optical probe, while a separate emission band to serve as an internal reference in ratiometric sensing applications. This comprehensive review provides an in-depth exploration of the versatile applications of UCNPs in the optical sensing of various analytes based on energy transfer mechanisms, with emphasis on the recent developments. . The focus is on synthesizing UCNPs, surface functionalization, and their effective utilization especially in detecting gas molecules, pH changes, ions, free radicals, and disease biomarkers. Through a meticulous examination of the use of UCNPs, this review aims to contribute to a deeper understanding of their potential and pave the way for future advancements and challenges in optical sensing.http://www.sciencedirect.com/science/article/pii/S266683192400016XUpconverting nanophosphorsSensorsNIR-lightFRETLRETLimit-of-detection (LOD) |
| spellingShingle | Jitender Kumar Indrajit Roy Upconverting nanophosphors for various sensing applications Talanta Open Upconverting nanophosphors Sensors NIR-light FRET LRET Limit-of-detection (LOD) |
| title | Upconverting nanophosphors for various sensing applications |
| title_full | Upconverting nanophosphors for various sensing applications |
| title_fullStr | Upconverting nanophosphors for various sensing applications |
| title_full_unstemmed | Upconverting nanophosphors for various sensing applications |
| title_short | Upconverting nanophosphors for various sensing applications |
| title_sort | upconverting nanophosphors for various sensing applications |
| topic | Upconverting nanophosphors Sensors NIR-light FRET LRET Limit-of-detection (LOD) |
| url | http://www.sciencedirect.com/science/article/pii/S266683192400016X |
| work_keys_str_mv | AT jitenderkumar upconvertingnanophosphorsforvarioussensingapplications AT indrajitroy upconvertingnanophosphorsforvarioussensingapplications |