X-ray recharged long afterglow luminescent nanoparticles MgGeO₃:Mn²⁺,Yb³⁺,Li⁺ in the first and second biological windows for long-term bioimaging

Abstract

<p>Nanosized dual window afterglow particles possess X-ray rechargeable and photo-stimulation properties for long-term bioimaging.</p>

Tuning Multicolor Emission of Manganese-Activated Gallogermanate Nanophosphors by Regulating Mn Ions Occupying Sites for Multiple Anti-Counterfeiting Application

“…Moreover, the excitation wavelength-dependent PersL duration is shown in Figure 3c, which may originate from the pre-irradiated wavelength-dependent trapping and detrapping [24]. Aside from PL and PersL, the UV pre-irradiated Zn 3 Li 0.4 Ga 1.6 GeO 8 :Mn phosphor also exhibited superior PSL capabilities, peaking at 540 nm and 670 nm (Figure 3a) under the illumination of a 980 nm laser diode, which is consistent with previous reports [25,26]. We still found that the PL and PSL emission spectra were slightly different (Figure 3a).…”

“…Under excitation at 254 nm, the sample showed a broad-band emission spanning a range of 400-800 nm wavelength (Figure 4a), which is similar to the emission of Zn3Li0.4Ga1.6GeO8:Mn phosphor. When the excitation wavelength was switched to 337 nm, the green emission (Figure 4a), which can be assigned to the 4 T1(4G)→ 6 A1(6S) transition of Mn 2+ , dominated the emission, accompanying the weak red emission peaking at 701 nm [26]. PLE spectrum monitored at 540 nm Interestingly, the fluorescent colors of Mn-activated Zn 3 Ga 2 GeO 8 phosphor prepared by a hydrothermal approach could be further finely adjusted by substituting Zn 2+ with Li + to tune the occupancy rate of Mn ions in Zn 2+ and Ga 3+ sites.…”

Defect Enrichment in Near Inverse Spinel Configuration to Enhance the Persistent Luminescence of Fe3+

“…[10][11][12][13][14][15][16][17][18][19] Recently, near-IR (NIR) PersL materials have received particular interest due to their great application prospects in various biomedical applications, such as autofluorescence-free bioimaging, longterm biomolecule tracking. [20][21][22][23][24][25][26][27] However, in stark contrast to the evolving progress in the research of the PersL materials in visible region, the study concerning the design and development of NIR PersL materials is still lacking. [28,29] Hence, it is significantly important to develop and make up the number of NIR PersL materials.The luminescent materials are composed of matrixes and activators, the activators exist as emission centers while the matrixes provide an appropriate crystal environment for activators.…”

Opportunities for Persistent Luminescent Nanoparticles in Luminescence Imaging of Biological Systems and Photodynamic Therapy

“…Strategies used to improve X-ray activated PeL materials usually involve doping or codoping with heavy atoms such as Tb 3+ and Sm 3+ [263,264]. Zheng and co-workers recently demonstrated that X-ray activated MgGeO3:Mn 2+ ,Yb 3+ ,Li + PeL-NPs have long afterglow and can emit in the first and second biological windows for long-term luminescence imaging [265]. Phantom imaging as a function of time or pork tissue thickness (0, 1, 3, 5, 10, and 20 mm) using the PeL-NP ZnGa2O4:Cr 3+ .…”