Red LED Erbium Upconverting Nanoparticles v Cervical Cancer

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Red LED Erbium Upconverting Nanoparticles v Cervical Cancer ( red-led-erbium-upconverting-nanoparticles-v-cervical-cancer )

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Pharmaceutics 2020, 12, 1102 9 of 17 naïve PEG2k (0.1–2.0 mg to 10 mg UCNPs@SiO2) showed a clearly improved dispersibility of the relevant UCNPs@SiO2: UCNPs@SiO2 precipitated in aqueous media at a PEG2k amount of 0.1–0.2 mg, whereas UCNPs@SiO2 was very stable and dispersible at a PEG2k amount of 1–2 mg despite the presence of hydrophobic folic acid and TCPP. This is a clear pharmaceutical advantage of UCNPs@SiO2@FA/PEG/TCPP as a photodynamic agent that should be injected intravenously. Multimode UV spectrophotometry was used to measure the absorbance profiles between 450 and 750 nm for free TCPP, UCNPs@SiO2-NH2@FA/PEG, and UCNPs@SiO2-NH2@FA/PEG/TCPP. Figure 4. (A) Photographs of core or core@shell upconverting nanoparticles (UCNPs) emitting green As shown in Figure 5C, UCNPs@SiO -NH @FA/PEG/TCPP has a significant absorption peak around fluorescence. (B) Photographs of2 core,2 core@shell, or core@shell@ SiO2 UCNPs emitting red 660 nm, a common feature of TCPP [43]. On the contrary, UCNPs@SiO -NH @FA/PEG without fluorescence. (C) Photo images of silica-coated upconverting nanoparticles (2UCNP2s@SiO2) (10 mg) TCPP conjugation had no absorption peak from 450 to 750 nm, showing an almost flat spectrum. modified with (a) mPEG (0.1 mg) and FA/PEG (0.1 mg); (b) mPEG (0.2 mg) and FA/PEG (0.1 mg); (c) The results suggest that UCNPs@SiO -NH @FA/PEG/TCPP would produce a cancer cell death effect mPEG (0.5 mg) and FA/PEG (0.1 m2g); (d)2mPEG (1.0 mg) and FA/PEG (0.1 mg); (e) mPEG (2.0 mg) by thaenpdhFoAto/PdEyGna(0m.1icmmg)o; adned. (f) mPEG (2.0 mg), FA/PEG (0.1 mg), and TCPP (1.0 mg). Figure 5. (A) UV-Vis-NIR absorption spectra of core and core@shell UCNPs (400–850 nm). (B) Zeta potentials of UCNPs@SiO2, UCNPs@SiO2, UCNPs@SiO2@FA//PEG, and UCNPs@SiO2@FA/PEG/TCPP 222 2 (n=3).**pp<0<.00.100o1veorvUerCUNCPsN@PSsi@OS2@iOFA@/PFEAG/P;E**Gp; <**0p.00<50o.v0e0r5UoCveNrPUs@CSNiOP2s@FSAiO/PE@GFA/T/CPEPGP;/T**C*PpP<; 22 *0*.*00p5

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