A broadening temperature sensitivity range with a core–shell YbEr@YbNd double ratiometric optical nanothermometer. Issue 9 (11th February 2016)

• Record Type: Journal Article
• Authors: Marciniak, L.; Prorok, K.; Francés-Soriano, L.; Pérez-Prieto, J.; Bednarkiewicz, A.
• Is Part Of: Nanoscale. Volume 8:Issue 9(2016)
• Page Start: 5037
• Page End: 5042
• Publication Date: 2016-02-11
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c5nr08223d
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : The chemical architecture of lanthanide doped core–shell up-converting nanoparticles can be engineered to purposely design the properties of luminescent nanomaterials, which are typically inaccessible to their homogeneous counterparts. Abstract : The chemical architecture of lanthanide doped core–shell up-converting nanoparticles can be engineered to purposely design the properties of luminescent nanomaterials, which are typically inaccessible to their homogeneous counterparts. Such an approach allowed to shift the up-conversion excitation wavelength from ∼980 to the more relevant ∼808 nm or enable Tb or Eu up-conversion emission, which was previously impossible to obtain or inefficient. Here, we address the issue of limited temperature sensitivity range of optical lanthanide based nano-thermometers. By covering Yb–Er co-doped core nanoparticles with the Yb–Nd co-doped shell, we have intentionally combined temperature dependent Er up-conversion together with temperature dependent Nd → Yb energy transfer, and thus have expanded the temperature response range Δ T of a single nanoparticle based optical nano-thermometer under single ∼808 nm wavelength photo-excitation from around Δ T = 150 K to over Δ T = 300 K (150–450 K). Such engineered nanocrystals are suitable for remote optical temperature measurements in technology and biotechnology at the sub-micron scale.