IP Library › Granted Patent US 7,067,072
Granted Patent B2
US 7,067,072 · App. 10/223,764 · Granted Jun 27, 2006

Nanophase luminescence particulate material

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Quick Facts
Patent No.
US 7,067,072
App. No.
10/223,764
Granted
Jun 27, 2006
Kind
B2
Abstract

The present invention relates in general to nanoparticles exhibiting luminescence such as photostimulated luminescence or photoluminescence and optical switching processes based upon such properties, in more particular, the use of such photostimulated luminescence exhibiting nanoparticles and switching nanoparticle for optical storage apparatuses and sensors as well as methods of making and using same.

Claims (25)

1. A nanophase luminescence particulate material having a size less than 100 nm and having the general formula X/Y, wherein X is at least two dopants selected from the group of ion pairs consisting of (Mn,Eu), (Ce,Tb), (Ag,Eu), (Ce,Eu), (Eu,Tb), (Ce,Yb), (Tb,Yb), (Yb,Eu), (Pr,Tm), (Pr,Sm), (Pr,Dy), (Dy,Sm), (Dy,Tm), (Eu 2+ , Eu 3+ ) and (Sm,Tm), and further wherein Y is a nanoparticle host represented by the general formula (M 1−z N z ) x A 1−y B y , wherein M=Zn, Cd or Hg; N=Zn, Cd, Pb, Ca, Ba, Sr, Mg, Hg; A=S, Se, Te, or O; B=S, Se, Te, or O; and wherein 0<x≦1, 0<y≦1, 0<z≦1.

2. The nanophase luminescence particulate material of claim 1 , wherein the nanoparticle host is selected from the group consisting of Zn x S y , Zn x Se y , Zn x Te y , Cd x S y , Cd x S y , Cd x Te y , wherein 0<x≦1, 0<y≦1.

3. The nanophase luminescence particulate material of claim 2 , wherein the nanoparticle host is ZnS.

4. The nanophase luminescence particulate material of claim 1 , wherein the nanoparticle is Zn 0.4 Cd 0.4 S.

5. The nanophase luminescence particulate material of claim 1 , wherein the nanoparticle is Zn 0.9 S 0.8 Se 0.2 .

6. A nanophase luminescence particulate material having a size less than 100 nm and having the general formula X/Y, wherein X is at least one dopant and Y is a nanoparticle host, wherein the nanoparticle host is represented by the general formula (M x A y B 2−y ), wherein M=Ca, Ba, Sr, or Mg; A=F, Cl, Br, or I; B=F, Cl, Br, or I, and 0<x≦1 and 0<y<2, wherein the nanoparticle host is selected from the group consisting of BaF 2−x Br x , BaF 2−x Cl x wherein 0<x<2.

7. The nanophase luminescence particulate material of claim 6 , wherein the nanoparticle host is BaFBr.

8. The nanophase luminescence particulate material of claim 6 , wherein the nanoparticle host is BaFCl.

9. The nanophase luminescence particulate material of claim 6 , wherein the dopant is selected from the group consisting of a rare earth ion, a halide ion or a transition metal ion.

10. The nanophase luminescence particulate material of claim 1 , wherein the nanophase luminescence material is ZnS:Mn 2+ ,Eu 3+ .

11. The nanophase luminescence particulate material of claim 6 , wherein the nanophase luminescence material is BaFBr:Eu 2+ , BaFBr:Eu 3+ or BaFCl:Eu 2+ .

12. The nanophase luminescence particulate material of claim 6 , wherein the nanophase luminescence material is BaFBr:Eu 2+ ,Tb 3+ or BaFBr:Eu 2+ , Eu 3+ .

13. The nanophase luminescence particulate material of claim 1 or 6 , wherein the nanophase luminescence material has a photostimulated luminescence.

14. The nanophase luminescence particulate material of claim 1 or 6 , wherein the nanophase luminescence material has a excitation wavelength that is longer than the emission wavelength.

15. The nanophase luminescence particulate material of claim 14 , wherein the nanophase luminescence material has an excitation wavelength of from about 400 nm to about 5000 nm and an emission wavelength of from about 200 nm to about 2000 nm.

16. The nanophase luminescence particulate material of claim 1 or 6 , wherein the nanophase luminescence material is capable of switching from an initial state to a secondary state and back to the initial state.

17. A nanophase luminescence particulate material having the formula Y 2 O 3 :Tb 3+ ,Eu 3+ .

18. A film comprising a nanophase luminescence particulate material, wherein the nanophase luminescence particulate material has a size less than 100 nm and is of the general formula X/Y, wherein X is at least two dopants selected from the group of ion pairs consisting of (Mn,Eu), (Ce,Tb), (Ag,Eu), (Ce,Eu), (Eu,Tb), (Ce,Yb), (Tb,Yb), (Yb,Eu), (Pr,Tm), (Pr,Sm), (Pr,Dy), (Dy,Sm), (Dy,Tm), (Eu 2+ , Eu 3+ ) and (Sm,Tm), and further wherein Y is a nanoparticle host represented by the general formula (M 1−z N z ) x A 1−y B y , wherein M=Zn, Cd or Hg; N=Zn, Cd, Pb, Ca, Ba, Sr, Mg, Hg; A=S, Se, Te, or O; B=S, Se, Te, or O; and wherein 0<x≦1, 0<y≦1, 0<z≦1.

19. The film of claim 18 further comprising a polymeric binding agent.

20. A colloidal solution comprising a nanophase luminescence particulate material and an aqueous or non-aqueous solvent, wherein the nanophase luminescence particulate material has a size less than 100 nm and is of the general formula X/Y, wherein X is at least two donants selected from the group of ion pairs consisting of (Mn,Eu), (Ce,Tb), (Ag,Eu), (Ce,Eu), (Eu,Tb), (Ce,Yb), (Tb,Yb), (Yb,Eu), (Pr,Tm), (Pr,Sm), (Pr,Dy), (Dy,Sm), (Dy,Tm), (Eu 2+ , Eu 3+ ) and (Sm,Tm), and further wherein Y is a nanoparticle host reDresented by the general formula (M 1−z N z ) x A 1−y B y , wherein M=Zn, Cd or Hg; N=Zn, Cd, Pb, Ca, Ba, Sr, Mg, Hg; A=S, Se, Te, or O; B=S, Se, Te, or O; and wherein 0<x≦1, 0<y≦1, 0<z≦1.

21. A nanophase luminescence particulate material having a size less than 100 nm and having the general formula X/Y, wherein X is at least one dopant and Y is a nanoparticle host, wherein the nanoparticle host is represented by the general formula (M x A y B 2−y ), wherein M=Ca, Ba, Sr, or Mg; A=F, Cl, Br, or I; B=F, Cl, Br, or I, and 0<x≦1 and 0<y<2, wherein A does not equal B.

22. A film comprising a nanophase luminescence particulate material, the nanophase luminescence particulate material having a formula as set forth in claim 21 .

23. The film of claim 22 further comprising a polymeric or glass matrix.

24. A colloidal solution comprising a nanophase luminescence particulate material and an aqueous or non-aqueous solvent, the nanophase luminescence particulate material having a formula as set forth in claim 21 .

25. A nanophase luminescence particulate material having a size less than 100 nm and having the general formula X/Y, wherein X is at least one dopant and Y is a nanoparticle host, wherein the nanoparticle host is represented by the general formula (M x F v Cl w Br y I z ) wherein M=Ca, Ba, Sr, or Mg and 0<x≦1; 0≦v≦2; 0≦w≦2; 0≦y≦2; 0≦z≦2; the combination of v+w+y+z is greater than 1 and less than or equal to 2; and at least two of v, w, y, and z are greater than zero.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 15, 2014
From: NOMADICS, INC.
To: FLIR DETECTION, INC.
Reel/Frame 034509/0892 →