The effects of the amount of Ge4+ doped in Zn2Ga3.98-4/3Ge O8:Cr0.02 nanoparticles on size distribution, NIR afterglow imaging and temperature sensing

NIR‐I/III afterglow induced by energy transfers between Er and Cr codoped in ZGGO nanoparticles for potential bioimaging

“…To investigate the relationship between the energy transfer and persistent luminescence, TL spectra of ZGGO:Cr 3+ ,Er 3+ nanoparticles with different Er 3+ contents were measured after stopping 60‐mSv X‐ray irradiation and were shown in Figure 7. Monitoring the afterglow emission at 696 nm, each of TL spectra exhibits a broad peak in temperature range of 295‐480 K, which suggests the trap levels are quasi‐continuous 33,42 . Meanwhile, the position of TL peak shifts to high temperature side and the intensity of TL decreases with increasing Er 3+ concentration.…”

Photothermal conversion performance and acid-induced aggregation of PLNP-Bi2S3 composite nanoplatforms

“…10a and b, respectively. It can be found that the temperatures of the aqueous dispersions decrease from 44.7 to 24.5 °C with increasing afterglow decay time from 45 to 200 s. According to our previous studies, 10,19,20 the ratiometric afterglow nanothermometers originating from NIR emissions of surface and interior Cr 3+ ions in PSS modified PLNP-Bi 2 S 3 composite nanoplatforms are applied to this study. By fitting their afterglow emission spectra as shown in the inset of Fig.…”

“…It can be found that the appearance of the red absorption and NIR emission bands, originating from the 4 A → 4 T 2 and 2 E/ 4 T 2 → 4 A 2 transitions of Cr 3+ , suggests ZGGO: Cr 3+ @CTAB nanoparticles might be applied to potential bioimaging. [19][20][21][22] From the NIR afterglow decay curve moni-tored at 697 nm of ZGGO:Cr 3+ @CTAB nanoparticles with x = 0.40 mmol after stopping 5 min 635 nm laser irradiation as shown in Fig. 1d, it can be found that the afterglow decay time exceeds 15 h. From the clear NIR image of ZGGO:Cr 3+ @CTAB (x = 0.40 mmol) aqueous dispersions recorded at 20 s after ceasing 10 min 635 nm laser irradiation as shown in the inset of Fig.…”

“…To quantitatively analyze the acid-induced aggregation, size distributions of PSS modified PLNP-Bi 2 S 3 composite nanoplatforms dispersed in HSA, pH 6.5 and pH 5.0 solutions as a function of standing time (5,10,20,30, 60 min) are shown in Fig. 9a-c, respectively.…”

Surface Modified Persistent Luminescence Probes for Biosensing and Bioimaging: A Review

“…studied the influence of Ge 4+ concentrations (0.45≤ x ≤0.90) on the temperature sensing capability of Zn 2 Ga 3.98‐4 x /3 Ge x O 8 :Cr 0.02 (ZGGO:Cr) PLNPs. [ 62 ] They found when x = 0.90, the PLNPs can be used as a nanothermometer due to the change of afterglow intensity with temperature and the detection range was located in physiological temperature range, which proved its potential to monitor the slight alterations in temperature during diagnosis and treatment.…”