Method of maximizing anharmonic oscillations in deuterated alloys

For a condensed matter system containing a guest interstitial species such as hydrogen or its isotopes dissolved in the condensed matter host lattice, the invention provides tuning of the molecular orbital degeneracy of the host lattice to enhance the anharmonicity of the dissolved guest sublattice to achieve a large anharmonic displacement amplitude and a correspondingly small distance of closest approach of the guest nuclei. The tuned electron molecular orbital topology of the host lattice creates an energy state giving rise to degenerate sublattice orbitals related to the second nearest neighbors of the guest bonding orbitals. Thus, it is the nuclei of the guest sublattice that are set in anharmonic motion as a result of the orbital topology. This promotion of second nearest neighbor bonding between sublattice nuclei leads to enhanced interaction between nuclei of the sublattice. In the invention, a method for producing dynamic anharmonic oscillations of a condensed matter guest species dissolved in a condensed matter host lattice is provided. Host lattice surfaces are treated to provide surface features on at least a portion of the host lattice surfaces; the features have a radius of curvature less than 0.5 microns. Upon dissolution of the guest species in the treated host lattice in a ratio of at least 0.5, the guest species undergoes the dynamic anharmonic oscillations.

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Claims

1. A condensed matter host lattice adapted for causing a condensed matter guest species dissolved in the host lattice to undergo dynamic Jahn-Teller oscillations, the host lattice comprising a structure upon at least a portion of which structure are provided features having a radius of curvature less than about 0.5 microns, the host lattice being characterized by degenerate molecular orbitals corresponding to a Jahn-Teller coupling parameter,.beta., of between about 0.25 and 0.5, for inducing the guest species to undergo dynamic Jahn-Teller oscillations.

2. The host lattice of claim 1 wherein said lattice structure comprises a layer of host lattice material deposited on a C.sub.60 Fullerene.

3. The host lattice of claim 1 wherein said lattice structure comprises first and second host lattice submaterials alternately layered, each layer of first and second lattice submaterials being between about 1 nanometer and 100 nanometers in thickness, layer interfaces of the submaterials being characterized by a molecular orbital degeneracy corresponding to a Jahn-Teller coupling parameter,.beta., of between about 0.25 and 0.5.

4. The host lattice of claim 3 wherein said first and second host lattice submaterials comprise nickel and copper.

5. The host lattice of claim 3 wherein said first and second host lattice submaterials comprise nickel and palladium.

6. The host lattice of claim 3 wherein said first and second host lattice submaterials comprise copper and palladium.

7. The host lattice of claim 1 wherein said lattice structure has been cold worked.

8. The host lattice of claim 1 wherein said lattice structure comprises a nanograin, polycrystalline morphology, grain boundaries of the polycrystalline morphology being characterized by a molecular orbital degeneracy corresponding to a Jahn-Teller coupling parameter,.beta., of between about 0.25 and 0.5.

9. The host lattice of claim 1 wherein said lattice structure comprises a sheet of palladium silver alloy.

10. The host lattice of claim 9 wherein said lattice structure comprises a coiled sheet of palladium silver alloy.

11. The host lattice of claim 1 wherein said lattice structure comprises a nickel wire.

12. The host lattice of claim 11 wherein said nickel wire comprises a multiclad wire consisting of a nickel core surrounded by a layer of palladium.

13. The host lattice of either of claims 9 or 11 wherein said guest species comprises a hydrogen isotope.

14. The host lattice of either of claims 9 or 11 wherein said surface features comprise generally V-shaped surface grooves.

15. The host lattice of either of claims 9 or 11 wherein said surface features comprise generally rectangular-shaped surface cavities.

16. The host lattice of either of claims 9 or 11 wherein said surface features comprise generally pointed asperities.

17. The host lattice of claim 1 characterized by a dissolution ratio of said guest species in said host lattice of at least about 0.8.

Referenced Cited
U.S. Patent Documents
3219481 November 1965 Chodosh et al.
3238700 March 1966 Cohn
3620844 November 1971 Wicke
4222900 September 16, 1980 Bohl
4284482 August 18, 1981 Yahalom
4485152 November 27, 1984 Homan et al.
4699637 October 13, 1987 Iniotakis et al.
4820481 April 11, 1989 Wolff et al.
4925538 May 15, 1990 Matsumoto et al.
5078834 January 7, 1992 Witte
5198043 March 30, 1993 Johnson
5327625 July 12, 1994 Clark, Jr. et al.
Foreign Patent Documents
53-044485 April 1978 JPX
9015415 December 1990 WOX
Other references
  • Clerjaud et al., "Strong spin-lattice coupling of Kramers doublets," Phys. Rev. B, V. 16, N. 1, pp. 82-85, Jul. 1977. Singh et al., "Effect of anharmonicity on superconducting metal-hydrogen systems," Phys. Rev. B, V. 18, N. 7, pp. 3271-3274, Oct. 1978. Huberman et al., "Chaotic States of Anharmonic Systems in Periodic Fields," Phys. Rev. Lett., V. 43, N. 23, pp. 1743-1747, Dec. 1979. Kohara et al., "NMR Study of Size Effect in Ferromagnetic Ni Metal," Jnl. Phys. Soc. Japn., V. 54, N. 4, pp. 1537-1542, Apr. 1985. Hamann et al., "Anharmonic vibrational modes of chemisorbed H on the Rh(001) surface," Phys. Rev. B, V. 37, N. 8, pp. 3847-3855, Mar. 1988-I. Celani et at., "Results of the 1st Generation Experiments at Gran Sasso Undergd. Lab, on Nuclear Cold Fusion," Conf. Proc., Cold Fusion Phen., Ital. Phys. Soc., Sep. 15-16, Varenna Italy, 1988. Hemmes et al., "Isotope effects and press. dep. on the T.sub.c of supercon. stoichiometric PdH & PdD synth. and measured in a diam. anvil cell," Phys. Rev. B, V. 39, N. 7, pp. 4110-4118, Mar 1989. Fleischmann et al., "Electrochemically induced nuclear fusion of deuterium," J. Electroanal. Chem, V. 261, N. 2A, pp. 301-308, Apr. 1989. Jones et al., "Observation of cold nuclear fusion in condensed matter," Nature, V. 338, N. 6218, pp. 737-740, Apr. 1989. Yokoyama et al., "Temperature-Depend. Study on Supported Silver and Palladium Clusters," Japan. Jnl. Appl. Phys., V. 28, N. 5, pp. L851-L853, May 1989. Mizuno et al., "Neutron Evolution from Annealed Palladium Cathode in LiOD-D.sub.2 O Solution," Electrochemistry, V. 57, N. 7, pp. 742-743, Jul. 1989. Ruzic et at., "A novel apparatus to investigate the possibility of plasma-assisted cold fusion," Fusion Tech., V. 16, pp. 251-253, Sep. 1989. Bussard, "Virtual-state internal nuclear fusion in metal lattices," Fusion Tech., V. 16, pp. 231-236, Sep. 1989. Johnson et al., "Hydrogen-Hydrogen/Deuterium-Deuterium bonding in palladium and the super./electrochem. properties of PdH.sub.x /PdD.sub.x," Mod. Phys. Lett. B, V. 3., N. 10, pp. 795-803, 1989. Shani et al., "Evidence for a Backgd. Neutron Enhanced Fusion in Deuterium Absorbed Palladium," Sol. St. Comm., V. 72, N. 1, pp. 53+, Oct. 1989. Yokoyama et al., "Temperature dependent EXAFS study on silica-supported small silver and palladium clusters," Physica B, V. 158, pp. 255-256, 1989. McNally, "On the possibty. of a nuclear mass-energy resonance in D+D reactions at low energy," Fusion Tech., V. 16, pp. 237-239, Sep. 1989. Prelas, "Advanced energy conversion methods for cold fusion," Fusion Tech. V. 16, pp. 240-242, Sep. 1989. Rogers et al., "Isotopic hydrogen fusion in metals," Fusion Tech., V. 16, pp. 254-259, Sep. 1989. Ragheb et al., "On the possibility of deuteron disintegration in electrochemically compressed D+ in a palladium cathode," Fusion Tech., V. 16, pp. 243-247, Sep. 1989. Oka et at., "Electrochemically induced deuterium-tritium fusion power reactor-prelim. design of a reactor system," Fusion Tech. V. 16, pp. 260-262, Sep. 1989. Oka et al., "D.sub.2 O-fueled fusion power reactor using electrochem. induced D-D.sub.n, D-D.sub.p, and deuterium-tritium reacts. -prelim. des. of a react. system," Fusion Tech. V. 16, pp. 263-267, Sept. 1989. Stacey, "Reactor Prospects of Muon-catalyzed fusion of deuterium and tritium concent. in transition metals," Fusion Tech., V. 16, pp. 268-275, Sep. 1989. Yokoyama et al., "Temp.-dep. EXAFS study on supp. silver and palladium clusters: comp. of the. interatom. pot. with those of bulk mets.," Jap. Jnl. Appl. Phys., V. 29, N. 10, pp. 2052-2058, 1990. Huot et al., "Low Hydrogen Overpotential Nanocrystalline Ni-Mo Cathodes for Alkaline Water Electrolysis," J. Electrochem. Soc., V. 138, N. 5, pp. 1316-1320, May 1991. Potvin et al., "Study of the Kin. of the Hyd. Evol. React. on Phosph.-Bonded Comp. Nickel Elect. by the Open-Cir. Pot. Decay Meth.," J. Electrochem Soc., V. 138, N. 4, pp. 900-905, Apr. 1991. Galbaatar et at., "On the influence of anharmonicity on the isotope effect," Physica C, V. 185-189, pp. 1529-1530, 1991. Suryanarayana et al., "The Structure and Mechanical Properties of Metallic Nanocrystals," Metallurgical Transactions A, V. 23A, pp. 1071-1081, Apr. 1992. Kolesnikov et al., "Strong anharmonic H(D) vibrations in the 5-phase of titanium hydride: obs. of bound multiphonon states," Physica B, V. 180&181, pp. 284-286, 1992. Cahen et al, "Room-Temperature, Electric Field-Induced Creation of Stable Devices in CuInSe.sub.2 Crystals," Science, V. 258, pp. 271-274, Oct. 1992. Koleske et al., "Temperature dependence and anharmonicity of phonons on Ni(110) and Cu(110) using molecular dynamics simulations," Surf. Sci., V. 298, pp. 215-224, 1993. Fleischmann et al., "Calorimetry of the Pd-D.sub.2 O system: from simplicity via complications to simplicity," Physics Letters A, V. 176, pp. 1-12, 1993. Flach et al., "Integrability and localized excitations in nonlinear discrete systems," Phys. Rev. E, V. 49, N. 1, pp. 836-850, Jan. 1994. Reifenschweiler, "Reduced radioactivity of tritium in small titanium particles," Phys. Lett. A, V. 184, pp. 149-153, 1994. Brodowsky et al., "Wasserstoff in Palladium/Silber-Legierungen," Zeitschriftfur Physikalische Neue Folge, Bd, 44, S. pp. 143-159, 1965. Dobson, "Potentials of the palladium hydride reference electrode between 25.degree. C and 195.degree. C," J. Electroanalytical Chemistry, vol. 35, pp. 129-135, 1972. Flanagan et al., "The effect of lattice defects on hydrogen solubility in palladium," Journal of the Less-Common Metals, vol. 49, pp. 13-24, 1976. Miley et al., "Electrolytic cell with multilayer thin-film electrodes," Transactions of Fusion technology, vol. 26, No. 4T, Pt. 2, pp. 313-320, Dec. 1994. Pindor et al., "On the electronic structure of Ag.sub.c Pd.sub.1-c alloys," J. Phys. F: Metal Phys., vol. 10, pp. 2617-2647, 1980. Durham et al., "Local Densities of States in Ag-Pd Alloys," Inst. Phys. Conf. Series No. 55: Chapter 3-Physics of Transition Metals pp. 145-148, The Institute of Physics, 1980. Satoko, "The role of d orbitals in dissociative chemisorption of hydrogen molecules on metal surfaces," Surface Science, vol. 134, pp. 1-16, 1983. Raufi et al., "Effects of short-range order on electrical resistivity," Phys. Stat. Sol. (a), vol. 97, pp. 571-577, 1986. Nagy et al., "Palladium/Hydrogen membrane electrode for high temp/high pressure aqueous solutions," J. Electrochem. Soc.:Elctrchem. Sci. & Tech., vol. 33, No. 11, pp. 2232-2235, Nov. 86. Rudinska-Girulska et al., "Electronic structure of Pd.sub.1-x Ag.sub.x alloys on the basis of positron annihilation data", Physica Scripta, vol. 37, pp. 952-956, 1988. Takeno et al., "Anharmonic resonant modes in perfect crystals," Solid State Communications, vol. 67, No. 11, pp. 1023-1026, 1988. Sievers et al., "Intrinsic localized modes in anharmonic crystals," Physical Review Letters, vol. 61, No. 8, pp. 970-973, Aug. 22, 1988. Kapoor et al., "Influence of hydrogen diffusion on thermal conductivity of nickel," Phys. Stat. Sol., vol. 105, pp. 403-409, 1988. Miyazaki et al., "Decay of H (D) atoms in solid hydrogen at 4.2 K. Rate constant for tunneling reaction H.sub.2 (D.sub.2, HD)+H (D)," J. Phys. Chem., vol. 93, No. 8, pp. 3352-3355, 1989. Thompson, "Chaotic phenomena triggering the escape from a potential well," Proc. R. Soc. London A, vol. 421, pp. 195-225, 1989. Burlakov et al., "Localized vibrations of homogeneous anharmonic chains," Physics Letters A, vol. 147, No. 2,3, pp. 130-134, Jul. 2, 1990. Zuchner et al., "Electrochemical measurements of hydrogen diffusion in the intermetallic compound LaNi.sub.5, " Jnl. of the Less-Common Metals, vol. 172-174, pp. 611-617, 1991. Zuchner et al., "Electrochemical isotherm measurements on the Pd-H and PdAg-H systems," Jnl. of the Less-Common Metals, vol. 172-174, pp. 816-823, 1991. Kishimoto et al., "Solution of hydrogen in cold-worked and annealed Pd-Ag(25 atomic %) alloys," Scripta Metallurgica et Materialia, vol. 25, pp. 877-881, 1991. Kivshar et al., "Modulational instabilities in discrete lattices," Physical Review A, vol. 46, No. 6, pp. 3198-3205, Sep. 15, 1992. Dauxois et al., "Energy localization in nonlinear lattices," Physical Review Letters, vol. 70, No. 25, pp. 3935-3938, Jun. 21, 1993. Koch, "The synthesis and structure of nanocrystalline materials produced by mechanical attrition: A review," Nanostructured Materials, vol. 2, pp. 109-129, 1993. Arata et al., "Reproducible `cold` fusion reaction using a complex cathode," Fusion Technology, vol. 22, No. 2, pp. 287-295, Sep. 1992.
Patent History
Patent number: 5674632
Type: Grant
Filed: Oct 28, 1994
Date of Patent: Oct 7, 1997
Assignee: Massachusetts Institute of Technology (Cambridge, MA)
Inventors: Brian S. Ahern (Boxboro, MA), Keith H. Johnson (Cambridge, MA), Harry R. Clark, Jr. (Townsend, MA)
Primary Examiner: George Wyszomierski
Attorney: Theresa A. Lober
Application Number: 8/331,014