Assessment of NIR-triggered PEG-coated NaGdF4:Tm3+/Yb3+bio-compatible upconversion nanoparticles for contrast enhancement in OCT imaging and optical thermometry.
{"title":"Assessment of NIR-triggered PEG-coated NaGdF<sub>4</sub>:Tm<sup>3+</sup>/Yb<sup>3+</sup>bio-compatible upconversion nanoparticles for contrast enhancement in OCT imaging and optical thermometry.","authors":"Kumar Shwetabh, Abhishek Banerjee, Raju Poddar, Kaushal Kumar","doi":"10.1088/1748-605X/ad580b","DOIUrl":null,"url":null,"abstract":"<p><p>In this investigation, we embarked on the synthesis of polyethylene glycol coated NaGdF<sub>4</sub>:Tm<sup>3+</sup>/Yb<sup>3+</sup>upconversion nanoparticles (UCNPs), aiming to assess their utility in enhancing image contrast within the context of swept source optical coherence tomography (OCT) and photo-thermal OCT imaging. Our research unveiled the remarkable UC emissions stemming from the transitions of Tm<sup>3+</sup>ions, specifically the<sup>1</sup>G<sub>4</sub>→<sup>3</sup>H<sub>6</sub>transitions, yielding vibrant blue emissions at 472 nm. We delved further into the UC mechanism, meticulously scrutinizing decay times and the nanoparticles' capacity to convert radiation into heat. Notably, these nanoparticles exhibited an impressive photo-thermal conversion efficiency of 37.5%. Furthermore, our investigations into their bio-compatibility revealed a promising outcome, with more than 90% cell survival after 24 h of incubation with HeLa cells treated with UCNPs. The nanoparticles demonstrated a notable thermal sensitivity of 4.7 × 10<sup>-3</sup>K<sup>-1</sup>at 300 K, signifying their potential for precise temperature monitoring at the cellular level.</p>","PeriodicalId":72389,"journal":{"name":"Biomedical materials (Bristol, England)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biomedical materials (Bristol, England)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1748-605X/ad580b","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In this investigation, we embarked on the synthesis of polyethylene glycol coated NaGdF4:Tm3+/Yb3+upconversion nanoparticles (UCNPs), aiming to assess their utility in enhancing image contrast within the context of swept source optical coherence tomography (OCT) and photo-thermal OCT imaging. Our research unveiled the remarkable UC emissions stemming from the transitions of Tm3+ions, specifically the1G4→3H6transitions, yielding vibrant blue emissions at 472 nm. We delved further into the UC mechanism, meticulously scrutinizing decay times and the nanoparticles' capacity to convert radiation into heat. Notably, these nanoparticles exhibited an impressive photo-thermal conversion efficiency of 37.5%. Furthermore, our investigations into their bio-compatibility revealed a promising outcome, with more than 90% cell survival after 24 h of incubation with HeLa cells treated with UCNPs. The nanoparticles demonstrated a notable thermal sensitivity of 4.7 × 10-3K-1at 300 K, signifying their potential for precise temperature monitoring at the cellular level.