195 resultados para TB3
Resumo:
Terbium ions were successfully incorporated in nano-sized zinc oxide particles with a doping concentration up to 3% by using a wet chemical route. Four narrow emission peaks of Tb3+ ions and a broad emission band of the surface states on ZnO nano-hosts were observed for all Tb-doped nanoparticles. Relaxation of carriers from excited states of ZnO hosts to rare earth (RE) dopants is disclosed by the fact that the emission intensity of Tb3+ centers increases with increased Tb content at the expense of the emission from surface defect states in ZnO matrix. (C) 2001 Elsevier Science B.V. All rights reserved.
Resumo:
Terbium-doped zinc oxide nanoparticles have been prepared by hydrolyzing zinc acetate and terbium acetate. Nanoparticle-matrix-facilitated photoluminescence which is related to Tb3+ ions has been observed for ZnO:Tb nanoparticles. The dependence of emission intensity on doping concentration of Tb3+ ions has been investigated. An energy transfer from excited states of ZnO hosts to dopants is disclosed by the fact that the emission intensity of Tb3+ centers increases with increasing Tb content at the expense of emission from defect states in ZnO matrix.
Resumo:
Tb3+-doped zinc oxide nanocrystals with a hexagonal wurzite structure were successfully prepared by reaction between Zn-O-Tb precursors and LiOH in ethanol. Good incorporation of Tb3+ in ZnO nanocrystals is proved by XRD, FTIR, PL and PLE measurements. The presence of acetate complexes to zinc atoms on particle surfaces is disclosed by FTIR results. Emission from both Tb3+ ions and surface states in ZnO matrix, as well as their correlation were observed. The luminescence mechanism is discussed. (C) 2000 Elsevier Science B.V. All rights reserved.
Resumo:
// (Na3C6H5O7•2H2O)(NaF, NH4FNaBF4)pHLnF3 (Ln = La-Lu)NaREF4 (RE = Y, Yb, Lu)(Yb)(Lu)Eu3+, Tb3+Yb3+/Er3+, Yb3+/Ym3+(LEDs)/ CaWO4, CaWO4:Eu3+CaWO4:Tb3+
Resumo:
Field Emission Displays, FEDFEDFED (FED)(FED)-(FED) [(LaGaO3: Re3+ (Re = Eu, Tb, Dy, Tm, Sm)][(CaIn2O4: Re3+ (Re = Eu, Pr, Tb, Dy,)][(SrIn2O4: Re3+ (Re = Pr, Tb, Dy)][Lu3Ga5O12:Re3+ (Re = Eu, TbPr)]Pr, Sm, Eu, Tb, Dy, TmSr2CeO4SiO2CaTiO3:Pr3+, Y3Al5O12:Ce3+/Tb3+/Ga2O3:Dy3+XRDFTIRSEMTEM(PL)(CL) (LaGaO3)(Eu3+, Tb3+, Dy3+, Tm3+, Sm3+)(Eu3+, Tb3+, Dy3+, Tm3+, Sm3+)LaGaO3: Eu3+LaGaO3: Dy3+LaGaO3: Tm3+LaGaO3: Sm3+LaGaO3: Sm3+,Tb3+LaGaO3: Tb3+Tb3+LaGaO3: Tb3+LaGaO3: Tm3+FED(Y2SiO5: Ce3+NP-1047)LaGaO3: Sm3+((Zn,Cd)S: AgNP-1020)(LaGaO3: Sm3+,Tb3+), [(LaGaO3: Re3+ (Re = Eu, Tb, Dy, Tm, Sm )] Sr/CaIn2O4Sr/CaIn2O4Pr3+/Tb3+/Dy3+Sr/CaIn2O4Pr3+/ Tb3+/Dy3+Pr3+/Tb3+/Dy3+Sr/CaIn2O4: Pr3+/Tb3+/Dy3+(CL)(PL)CL CaIn2O4:Eu3+CaIn2O4:Eu3+Eu3+ Lu3Ga5O12:Re3+ (Re = Eu, TbPr)UVLu3Ga5O12: Eu3+, Lu3Ga5O12: Pr3+Eu3+, Pr3+Lu3Ga5O12:Tb3+Tb3+ Sr2CeO4UV(Ce4+-O2-) SiO2@CaTiO3:Pr3+SiO2@Y3Al5O12: Ce3+/Tb3+, FESEMTEMSiO2UVSiO2@CaTiO3:Pr3+Pr3+ 1D23H4 (612 nm)SiO2@Y3Al5O12:Ce3+SiO2@Y3Al5O12:Tb3+ Ce3+5d-4fTb3+5D4-7FJ (J = 6, 5, 4, 3)PLCL Ga2O3:Dy3+-Ga2O3:Dy3+--Ga2O3Dy3+--Ga2O3:Dy3+
Resumo:
CePO4:TbCePO4:Tb/LaPO4(/)CePO4CePO4:Tb10-30 nm200 nmCePO4:Tb/LaPO4(/)LaPO42-10 nmCePO4:TbCePO4:Tb/LaPO4(/)Ce3+ (5d - 4f)Tb3+ 5D4-7FJ(J = 6-3)CePO4:TbCePO4:Tb/LaPO4(/)/ (KBF4NaFNH4F)CeF3CeF3UV-VisEuF30.9 m-1.0 m0.14 mEuF3EuF3 CeVO4YVO4:Eu3+ CeVO45 nm150 nmCeVO4(122 m2•g-1)YVO4:Eu3+ 90-150 nm250-300 nmYVO4:EuEu3+ 5D0-7FJ(J = 1- 4)5D0-7F2(614nm)
Resumo:
CeF3:Tb3+SOCl2CeF3:Tb3+ CeF3:Tb3+ CeF3:Tb3+ P123CeF3:Tb3+ 24 h NaYF4:Yb3+, Er3+ NaYF4:Yb3+, Er3+ NaYF4:Yb3+, Er3+ P123PVP TMB NaYF4:Yb3+, Er3+ 12 h YVO4:Eu3+ 80 nm43 nmYVO4:Eu3+ 5D0FT-IR XPS Eu3+ (5D0 level) CAPTES
Resumo:
srB4O7BO4MBPO5MCaSrBaPO404BaSO4SO4Eu3+Eu2+ Sr4Al14O25AIO4BaMgsiO4SiO4Eu3+Eu2+Eu3+Eu2+BaMgSiO4Eu2+Eu2+Ba3Eu2+398nmBa1Ba2Eu2+500nmBaMgSiO4Eu2+Eu2+500nmBlasseSAll4025SrAl2O4Sr3A12O6Sr4Al4O25SrAl2O4Eu3+Eu2+Sr3A12O6Eu3Eu2Sr4Al14O25BaMgSiO4Sr3Al2O6SAll 4025BaMgsi04Sr3Al2O6Ce4Ce3+Sr4Al14O25Ce3Tb3+Eu2+Ce3Tb3+Eu2Sr4Al14O25BaMgSiO4Sr3Al2O6CaYBO4Tb35D35D4254nmCaYBO4Eu3+609nmBaMgsio4Ce3371nm
Resumo:
Lallgmuir-B1odgettLBLBK11CePWllO39222H2OK11EuPW11O39225H2OK11GdPW11O39224H2OK11SmPMo11O39219H2OK11CePMo11O39223H2OK11EuPMo11O39222H2OK11GdPMo11O3922OH2OK11LaPMo11O39218H2OLBLB30-80nmK13EuSiW11O39228H2OK13EuGewl 1039225H2OKEuBWllO39222H2ONSmWlo03618H20Na9DyS10O3622H2O1:11Tb3+
Resumo:
-Ca2RSSiO46O2RYGdYVO4LaPO41Eu3+Tb3+Dy3+Sm3+Er3+Pb2SEMAFMCa2R8SiO46O2RYGdEu3+Tb3+Ca2Y8SiO46O26hCs4fC35Do-7F25D4-7F5Eu3+Tb3+Y3+10mol6molCa2Y851O46O2:Eu3Ca2Y8SiO46O2:Tb3+800Pb2Ca2Gd8SiO4 6O2Gd3+Pb2Gd3Gd3nA3YVO4PechiniYvO4:AAEu3 Dy3Sm3Er3YVO4VO43-Dy3Sm3Er3Y3+2molLaPO4Etl3+591nm5Do-7FlTb3543nm5D4-7F5Ce35d-4fTb3Eu3+Tb3+Eu3+Tb3LaPO4:CeTbCe3+Tb3+95XRDx0x1 YVxP1-xO4:Eu3+YVxP1-xO4:Eu3+0x1xEu3+x0Eu3+1Eu3+5Do7F2Etlsx0Y0.98Eu0.l2PO4Eu3+D2d5D07FISD07F2xY0.98Eu0.02VxP1-xO40xl0x0.5Eu3+5 D0-7F2x0.6Eu3+5D0-7F2YVxP1-xO4:A30x1AErSmVO43-A3+VO43-VO43-n-A3+n1VO43-0.1x1xx1VO43-A3+xRVO4:A3+RYLaGdAEuSmErRA3+YVO4GdVO4D2dYVO4GdVO4A3+LaVO4A3+LaVO4C1C1D2dA3+Gd3+A3+GdVO4
Resumo:
AAO5200nmAAOAAOAAOM2O3:RE3+MY,Gd; REEuTbAAOAAO15Onm35nm2OnmAAOAAO2XRD331AAOAAO-Al2O33AAO350600nm435nm4AAOYO.96RE0.05O3REEuTbSEMEDXTEMSAEDXRDPLx-XRDSAEDRE2O3REYGdEu3D07F2Tb35D47FJJ=65435M2O3:RE3MYGdREEuTbAAO6M2O3:RE3M=YGdREEuTbO7YGd2O3:Eu3+AAOAAO 8M2O3: RE3+MYGdREEuTb0AAO
Resumo:
4fN-1n'l'4fN-1n'l'6604fN-1n'l'n'l'=5d6s6p4fN-1n'l'fN-15d4fN-15dfdhe[fciaiQi2]1/2Dy3+Tb3+fCe3+Eu2+4fN-15dheheCe3+Ey2+4fN-15dCe3+Eu2+4fN-15dFcEhQfi/NFc10Dq4fN-15dCe3+Eu2+heFc4fN-1n'l
Resumo:
MB4O7:REM=Sr BaREDTbTm HoZn4B6O13REREDy,TbTmHo ZnBO22:REREDy,TbTmHoM3PO42:REM=SrBaREDu, TbRD60Cop- MB407DyM=SrBaZn4B6O13:DyZnBO22DyZnoTb Sr3PO42:DyMB4O7:DyM=SrB EPR 60Cop- D3+Tb3+ 60Cop 760Cox p-p-
Resumo:
Silica-based functionalized terbium fluorescent nanoparticles were prepared, characterized and developed as a fluorescence probe for antibody labeling and time-resolved fluoroimmunoassay. The nanoparticles were prepared in a water-in-oil (W/O) microemulsion containing a strongly fluorescent Tb3+ chelate. N,N.N-1,N-1-12,6-bis(3'-aminomethyl-1'-pyrazolyl)phenylpyridine] tetrakis(acetate)-Tb3+ (BPTA-Tb3+), Triton X-100, octanol, and cyclohexane by controlling copolymerization of tetraethyl orthosilicate (TEOS) and 3-[2-(2- aminoethylamino)-ethylamino]propyl-trimethoxysilane (AEPS) with ammonia water. The characterizations by transmission electron microscopy and fluorometric quantum methods show that the nanoparticles are spherical and uniform in size, 45 +/- 3 nm in diameter, strongly fluorescent with fluorescence yield of 10% and a long fluorescence lifetime of 2.0 ms. The amino groups directly introduced to the nanoparticle's surface by using AEPS in the preparation made the surface modification and bioconjugation of the nanoparticles easier. The nanoparticle-labeled anti-human alpha-fetoprotein antibody was prepared and used for time-resolved fluoroimmunoassay of (x-fetoprotein (AFP) in human serum samples. The assay response is linear from 0.10 ng ml(-1) to about 100 ng ml(-1) with the detection limit of 0.10 ng ml(-1). The coefficient variations (CVs) of the method are less than 9.0%. and the recoveries are in the range of 84-98% for human serum sample measurements. (C) 2004 Elsevier B.V. All rights reserved.
Resumo:
Nanocrystalline Tm3+-doped La2O3 phosphors were prepared through a Pechini-type sol-gel process. X-ray diffraction, field-emission scanning electron microscopy, photoluminescence, and cathodoluminescence spectra were utilized to characterize the synthesized phosphors. Under the excitation of UV light (234 nm) and low-voltage electron beams (1-3 kV), the Tm3+-doped La2O3 phosphors show the characteristic emissions of Tm3+(D-1(2), (1)G(4)-F-3(4), H-3(6) transitions).
