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3 protocols using yb no3 3 6h2o

1

Synthesis of Silica-based Luminescent Nanoparticles

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Silica spheres with a diameter of 5 µm were obtained from Baseline Chrom Tech, Tianjin, China. Poly(styrene sulfonate) sodium salt (PSS, Mw = 70 000), poly(allylamine hydrochloride) (PAH, Mw = 70 000), poly(acrylic acid) (PAA, Mw = 1800), Y(NO3)3·6H2O, Er(NO3)3·6H2O, and Yb(NO3)3·6H2O were purchased from Sigma-Aldrich. 2,4,6-Trinitrotoluene (TNT) was purchased from Best-reagent, Chengdu, China. 3-Aminopropyltriethoxysilane (APTES), ethylene glycol dimethacrylate (EGDMA) 2,2’-azobisisobutyronitrile (AIBN), 1-octadecene (ODE, 90%) and oleic acid (OA, 90%) were obtained from Aladdin Chemistry Co. Ltd. NaOH, NH4F, ethanol, methanol, cyclohexane, trichloromethane, acetonitrile, NaCl, Na2HPO4, and NaH2PO4 were purchased from Tianjin Tianli Chemical Reagent Co. Ltd. Hydrofluoric acid (HF) and hydrogen peroxide (H2O2) were obtained from Beijing Chemical Works, China. All commercial materials were used without further purification.
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2

Synthesis of Lanthanide-Doped Upconversion Nanoparticles

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All of the chemicals were utilized without
additional purification. Y(NO3)3·6H2O (99.99%), Yb(NO3)3·6H2O (99.99%), Er(NO3)3·6H2O (99.99%),
diethylene glycol, poly(acrylic acid) (PAA), and ethylenediamine (reagent,
99%) were purchased from Sigma-Aldrich. Oleic acid (90%, technical
grade), 1-octadecene (90%, technical grade), and hydrochloric acid
(HCl, analytical reagent 35–38%) were purchased from Alfa Aesar.
Rhodamine-B (RhB, 95%) and hydrazine hydrate 80 wt% solution in H2O were purchased from Loba Chemie Pvt. Ltd. Ammonium fluoride
(NH4F, 99%), sodium hydroxide (NaOH, 97%), cyclohexane
(C6H12 99%), ethanol (C2H5OH, analytical reagent 99%), and methanol (CH4OH, analytical
reagent 99%) were purchased from Spectrochem Pvt. Ltd. Double distilled
water was utilized to prepare all of the aqueous solutions. Aqueous
solutions of Sn2+, Hg2+, Co2+, Mg2+, Ni2+, Ca2+, Zn2+, Co2+, Cd2+, Na+, K+, and Cs+ were made from the corresponding halide salts.
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3

Synthesis of Rare-Earth Doped Nanocrystals

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All chemicals were used directly without further purification. Lu(NO3)3·6H2O, Yb(NO3)3·6H2O, Er(NO3)3·6H2O, and Ce(NO3)3·6H2O were purchased from Sigma-Aldrich Chemicals (Shanghai, China). Oleic acid (OA), 1-octadecene (ODE) and Barium stearate were obtained by Alfa Aesar Company (Shanghai, China). NaOH, NH4F and stearic acid (C17H35COOH) were obtained from China National Pharmaceutical Group Corporation (Beijing, China).
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