Amar Nath

Research Professor
Robinson Hall 245, CPO #2010








  • Agra University, Agra, India: Chemistry and Physics, B.S. (1948)
  • Agra University, Agra, India: Physical Chemistry, M.S. (1950)
  • Moscow State University, Moscow USSR: Physical Chemistry, Ph.D. (1961)
  • Agra University, Agra, India: Solid State Chemistry, D.Sc. (1970)

About me

  • Research Professor:  2005-present, Department of Chemistry, UNC at Asheville, Asheville, NC
  • Professor Emeritus:  2005-present, Department of Chemistry, Drexel University, Philadelphia, PA
  • Professor:  1970-2005, Department of Chemistry, Drexel University, Philadelphia, PA
  • Visiting Scientist:  1995, Centre d’Études de Saclay, Gif-sur-Yvette, France
  • Visiting Scientist:  1995, Departments of Chemistry & Physics, UC at San Diego, San Diego, CA
  • Visiting Scientist:  1981-1982, Institute of Chemistry, Nuclear Research Center, Juelich, West Germany
  • Visiting Scientist:  1972, 1974, Lawrence Berkeley Laboratory, UC at Berkeley, Berkeley, CA
  • Visiting Chemist, Calvin Research Group:  1967-1969, Department of Chemistry, UC at Berkeley, Berkeley, CA
  • Visiting Chemist, Libby Research Group:  1966-1967, 1969-1970, Department of Chemistry, UC at Los Angeles, Los Angeles, CA
  • Group Leader at Chemistry Division:  1961-1966, Bhabha Atomic Research Center, Bombay, India
  • Fellowship Awardee, Indian Ministry of Education:  1958-1961, Moscow State University, Moscow, USSR
  • Research Associate:  1951-1958, Chemistry Division, Bhabha Atomic Research Center, Bombay, India

Selected Publications 

1.             A. Nath, K.S. Venkaterswarlu and J. Shankar, "Kinetics of Isothermal Annealing of Radiation Damage in Szilard-Chalmers Reaction with Cobalt Complexes.  Tris-acetylacetone Cobalt (III)", Proc. Indian Acad. Sciences XLVI, 29 (1957).

2.             A. Nath and S.B. Srivastava, "Preliminary Study of the Kinetics of Isothermal Annealing of Radiation Damage in Szilard-Chalmers Reactions with Tris-glycine Cobalt (III)", J. Inorg. Nucl. Chem. 7, 143 (1958).

3.             A. Nath, S.B. Srivastava and J. Shankar, "Study of the Possibility of Preparation of High Specific Activity Co-60 Through Szilard-Chalmers Reactions", Proceeding of the Second International Conference on the Peaceful Uses of Atomic Energy, Geneva, 20, 58 (1958).

4.             J. Shankar, K.S. Venkateswarlu and A. Nath, "Recoil Effects of Co-60 in (n, ) reaction in Tris-acetylacetone Cobalt (III), Proc. Symp. Chemical Effects of Nuclear Transformations (Prague IAEA), 1, 309 (1961).

5.             J. Shankar, V.G. Thomas and A. Nath, "Recoil Effects of Co-60 in (n, ) Reactions in Potassium Tris-oxalato Cobalt (III) and Tris-oxine Cobalt (III)", Proc. Symp. Chemical Effect of Nuclear Transformations, (Prague IAEA), 1, 383 (1961).

6.             A. Nath, "Behavior of Recoil Cobalt Atoms Resulting From (,n) and (n,2n) Reactions in Cobalt Complexes", Proc. Symp. Chemical Effect of Nuclear Transformations, (Prague IAEA) 1, 335 (1961).

7.             A. Nath and An. Nesmeyanov, "Recoil Effects Accompanying 57Co(n,2n)58Co Reactions in Cobalt Complexes", Radiokhimiya 4, 122 (1962).

8.             A. Nath and An. Nesmeyanov, "Recoil Effects of Co-58 Resulting From (,n) Reaction in Cobalt Complexes", Radiokhimiya 5, 125 (1963).

9.             A. Nath, K.A. Rao and V.G. Thomas, "Oxygen-Effect in Thermal Annealing of Recoil Damage in Cobalt Chelates", Indian J. Chem. 2, 231 (1964).

10.          A. Nath, "Exo-electron Emission and Annealing of Recoil Damage", Indian J. Chem. 2, 232 (1964).

11.          A. Nath, K.A. Rao and V.G. Thomas, "Oxygen Effect in Annealing of Recoil Damage in Cobalt Chelates-Tris-acetylacetone Co(III) and Bis-salicylaldehyde triethylenetetramine Co(III) Chloride", Radiochim. Acta. 4, 162 (1965).

12.          J. Shankar, A. Nath and S.P. Vaish, "Role of Water of Hydration in the Annealing Behavior of Neutron-Irradiated Tris-Dipyridyl Co(III) Perchlorate, Trihydrate:, Radiochim. Acta 4, 162 (1965).

13.          A. Nath, S. Khorana, P.K. Mathur and S. Sarup, "Isotopic Exchange in the Solid State and Thermal Annealing of Recoil Damage in Cobalt Complexes.  A New Model", Indian J. Chem. 4, 51, (1966).

14.          K.A. Rao and A. Nath, "Influence of Electron Accepting and Donating Ambient Atmospheres on the Thermal Annealing of Recoil Damage in Cobalt Chelates-Bis- Salicylaldehyde Triethylenetetramine Cobalt (III) Chloride, Hydrate", Radiochim. Acta 5, 162 (1966).

15.          S. Sarup and A. Nath, "Annealing Behavior of Low Temperature Neutron-Irradiated Trisacetylacetone Cobalt (III) in Electron Accepting (oxygen) and Inert (nitrogen) Ambients", J. Inorg. Nucl. Chem. 29, 299 (1967).

16.          A. Nath and S.P. Vaish, "Studies on Thermal Annealing of Neutron-Irradiated Trisdipyridyl Co (III)Perchlorate. Redistribution of Electrons Among the Donors", J. Chem. Phys. 46, 4660 (1967).

17.          S. Khorana and A. Nath, "Effects of Added Electron Donor and Acceptor on the Solid State Exchange in 57Co++-Doped Tris-Dipyridyl Co(III) Perchlorate, Trihydrate", J. Phys. Chem. Solids 28, 1081 (1967).

18.          A. Nath, R.D. Agarwal and P.K. Mathur, "Mössbauer Studies on Electron-Capture After-Effects in Tris-Dipyridyl 57Cobalt (III) Perchlorate", Inorg. and Nuclear Chem. Letters 4, 161 (1968).

19.          A. Nath, M. Harpold, M.P. Klein and W. Kundig, "Emission Mössbauer Spectroscopy for Biologically Important Molecules--Vitamin B12, Its Analogs, and Cobalt Phthalocyanine", Chemical Physics Letters 2, 471 (1968).

20.          S. Khorana and A. Nath, "Thermal Annealing and Thermal Exchange in a Few Neutron Irradiated and 57Co++ Doped Ethylenediaminetetraacetate Chelates, Respectively", J. Inorg. Nucl. Chem. 31, 1283 (1969).

21.          A. Nath and M.P. Klein, "Direct Observation of Isotopic Exchange in the Solid State", Nature 224, 794 (1969).

22.          A. Nath, M.P. Klein, W. Kundig and D. Lichtenstein, "Mössbauer Studies of After-Effects of Auger Ionization Following Electron Capture in Cobalt Complexes", Radiation Effect 2, 211 (1970).

23.          A. Nath, R. Agarwal, L. Marton, V. Subramanyan and R.M. Lemmon, "The Role of Free Electrons in the Radiolysis of Crystalline Choline Chloride", J. Amer. Chem. Soc. 93, 2103 (1971).

24.          T.S. Srivastava, J. Przbylinski and A. Nath, "A Mössbauer Study of Intermolecular Interaction in Iron and Cobalt Phthalocyanines", Inorg. Chem. 13, 1562 (1974).

25.          T.S. Srivastava and A. Nath, "A Mössbauer Study of After-Effects of Auger Ionization Following Electron Caputer in 57Co(III) (1,10-Phenanthroline)3](ClO4)3. Radiochem. Radioanal. Letters 16, 103 (1974).

26.          A. Nath, R. Agarwal and R.M. Lemmon, "Further Studies on the Solid-State Chemistry of Irradiated Choline Chloride", J. Chem. Phys. 61, 1542 (1974).

27.          A. Nath, "Hot Atom Chemistry of the D-Block Elements", Specialist Periodical Reports, The Chemical Society, England. Invited review paper; "Radiochemistry" Vol. 2, pp. 74-113 (1975).

28.          M.B. Misrock, C.J. Schramm and A. Nath, "A Mössbauer Study of After-Effects of Auger Events in Cobalt Chelates with Varying Degree of Conjugation", J. Chem. Phys. 65, 1982 (1976).

29.          T.S. Srivastava and A. Nath, "The Stabilization of the Daughter Species Following the Auger Event in Some Cobalt (III) Chelates in Different Matrices", J. Phys. Chem. 80, 529 (1976).

30.          A. Nath, "Method of Labeling Complex Metal Chelates with Radioactive Metal Isotopes", U.S. Patent No. 3,936,440, (Feb. 3, 1978).

31.          K. Inoue and A. Nath, "Emission Mössbauer Studies of Some Cobalamins With and Without Coordination Linkage to the 5,6-Dimethylbenzimidazole Base", Bioinorg. Chem. 7, 159 (1977).

32.          T.S. Srivastava, S. Tyagi and A. Nath, "Emission Mössbauer Study of the Stereochemical Trigger That Initiates Cooperative Interaction of Hemoglobin Subunits", Proc. Acad. Sci., USA, 74, 4996 (1977).

33.          M. Katada, S. Tyagi and A. Nath, "Novel Conformational Isomers of Cobalamines".  Invited paper at the Porphyrin Symposium of ACS MARM meeting.  Porphyrin Chemistry Advances.  Edit. F.R. Long, Ann Arbor Science, pp. 157 (1979).

34.          M. Katada, S. Tyagi, A. Nath, R.L. Petersen and R.K. Gupta, "A Novel Form of Vitamin B12 and its Derivatives", Biochim. Biophys. Acta. 584, 149 (1979).

35.          R.K. Gupta, P.C. Goswami and A. Nath, "NMR Studies of a Novel Form of Vitamin B12", Proceedings of the Third European Symposium on Vitamin B12 and Intrinsic Factor (1979), "Vitamin B12"  Edit. Zagalak & Friedrich, pp. 179.

36.          M. Kalliat and A. Nath, "Isotopic Exchange in Solid Cobalt Phthalocyanine.  I, Thermal Treatment and Charge Transfer Interactions", J. Inorg. Nucl. Chem. 43, 271 (1981).

37.          M. Kalliat, M.U. Farooq, P. Kumar and A. Nath, "Isotopic Exchange in Solid Cobalt Phthalocyanine.  II, Space-Charge-Limited Electron Injection", J. Inorg. Nucl. Chem. 43, 281 (1981).

38.          P.K. Mishra, R.K. Gupta, P.C. Goswami, P.N. Venkatasubramanian and A. Nath, "Phosphorus-31 Nuclear Relaxation Studies of Para- and Diamagnetic Cobalamins in Their Two Isomeric Forms", Biochim. Biophys. Acta. 668, 406 (1981).

39.          P.K. Mishra, R.K. Gupta, P.C. Goswami, P.N. Venkatasubramanian and A. Nath, "Proton NMR Studies of the Isomers of Dicyanocobalamin and Dicyanocobinamide", Polyhedron, 1(4) 321 (1982).

40.          Ch. Sauer, M. Reiche, A. Halpern and A. Nath, "After-Effects of Auger Ionization Following Electron Capture in Organic Iodine-125 Compounds", Chem. Phys. Letters 94, 227 (1983).

41.          A. Nath, Ch. Sauer and A. Halpern, "Mössbauer Studies of After-Effects of Auger Ionization Following Internal Conversion in Organo-Tellurium 129m Compounds", J. Chem. Phys. 78, 5125 (1983).

42.          A. Nath, "Studies of Isotopic Exchange in Solid State:  Healing of Damaged Molecules", Accounts of Chemical Research 17, 90 (1984).

43.          R.K. Kohli and A. Nath, "Significance of Isomerization in Hyroxocobalamin", Biochem. Biophys. Res. Comm. 125, 698 (1984).

44.          R.K. Kohli and A. Nath, "Is It Isomerization of Cobalamins or Simple Hydrolysis of a Propionamide Side Chain?"  Inorg. Chim. Acta. (Bioinorg. Chem.) 136, 75 (1987).

45.          A. Nath, S. Nagy, M. Barsoum, S.D. Tyagi and Y. Wei "A Microprobe for the Cu(1) site in Y1Ba2Cu3 07-d  Emission Mössbauer Studies Using Carrier-Free Cobalt-57", Solid State Communication 68, 181 (1988).

46.          T.J. DiFeo, R.A. Schiksnis, R.K. Kohli, S.J. Opella and A. Nath, "Identification of b, d, and e Analogues of Vitamin B12 as Monocarboxylic Acids by 15N NMR Spectroscopy", Magnetic Res. in Chem. 27, 127 (1989).

47.          Amar Nath and Z. Homonnay "Emission Mössbauer Studies of Nonrigidity of Copper-Oxygen Chain in YBa2Cu307-d", Physica C, 161, 205 (1989).

48.          Z. Homonnay and A. Nath, "Dynamics of the Cu-0 Chain in YBa2Cu307-d Emission Mössbauer Studies", J. Supercond. 3, 433 (1990).

49.          Amar Nath, Zoltan Homonnay, S.D. Tyagi, Y. Wei, G-Way Jang and C-C Chan, "Rupture of Cobalt/Iron and Oxygen Bonds in the Chain During Thermal Treatment of YBa2Cu3(57Co)06.0:  Emission Mössbauer Studies", Physica C, 171, 406 (1990).

50.          Zoltan Homonnay, Amar Nath, Yen Wei and Jing Tian, "Microprobing of the Chain Site in Y Ba2Cu 30 6+x by Cobalt-57, as a Function of the Oxygen Content:  Superconductor—Insulator Transition" Physica C 174, 223 (1991).

51.          V. Chechersky, N. Kopelev, Beom-hoan O, M.I. Larkin, J.L. Peng, J.T. Markert, R.L. Greene, and A. Nath "Mössbauer Studies of Superparamagnetic Behavior in Nd-Ce-Cu-O System" Phys. Rev. Letters 70, 3355 (1993).

52.          Amar Nath, N.S. Kopelev, V. Chechersky, J-L. Peng, Richard L. Greene, B-h. O, M.I. Larkin, and J.T. Markert, "Chemical Signature of the Superconducting Phase in the Nd-Ce-Cu-O System" Science 265, 73(1994).

53.          V. Chechersky, N.S. Kopelev, A. Nath, J.-L. Peng, R.L. Greene, B.O., M.I. Larkin, and J.T. Markert, "Spin Dynamics in the Nd2-xCexCuO4 System: Estimation of Rate of Spin Fluctuations", Phys. Rev. B 54, 16254 (1996).

54.          V.Chechersky,A.Nath,H-L.Ju, and R.L.Greene, "Emission Mossbauer Study of CMR Manganites La0.8Ca0.2MnO3. I. Anomalous Ferromagnetism", Low Temp.Phys. 23, 545 (1997).

55.          V.Chechersky, K.Nomura, A.Nath, H-L.Ju, and R.L.Greene, "Emission Mossbauer Study of CMR Manganite La0.8Ca0.2MnO3. II. Step-by-step snapshots of the metal-insulator transition", Low.Temp.Phys. 23, 549 (1997).

56.          A. Nath,V. Chechersky, Z. Homonnay, and A. Vertes,"Emission Mossbauer Effect Studies of Some Outstanding Problems in High Temperature Superconductivity", in High Temperature Superconductivity:Ten Years After Its Discovery, edit K.B.Garg and S.M.Bose. Narosa Pub.(London).1998, p10. Invited Talk.

57.          V.Chechersky, A. Nath, and R.J.Cava,"Direct Evidence for the electronic phase inhomogeneity in HoNi2B2C", Physica C 303, 91 (1998).

58.          V.Chechersky, A. Nath,I Isaac,J.P.Franck, K Ghosh,H-L. Ju, and R.L.Greene,  "Evidence for  Break-down of Ferromagnetic Order below Tc in the Manganite La0.8Ca0.2MnO3" Phys. Rev.B 59, 497 (1999).

59.          A.Nath,V.Chechersky,Z.Homonnay, and A.Vertes,"Emission Mossbauer Studies of Some High Temperature Superconductors" in  Proc. ACS Symposium on " Spectroscopy of Superconducting Materials", edit. E. Faulques. ACS(1999), p139. Invited Talk.

60.          V. Chechersky, A. Nath, I. Isaac, J.P. Franck, K. Ghosh, and R.L. Greene,"Origin of the Giant oxygen-isotope effect in the manganite La 0. 8Ca 0.2MnO 3 " Phys. Rev.B 60, 3005 (1999).

61.          V. Chechersky, A. Nath, I. Isaac, J.P. Franck, K. Ghosh, and R. L. Greene, "Comparative studies of the behaviour of La0.8 Ca0.2MnO3 with different oxygen isotope substitutions." J. Phys.:Condens. Matter 11, 8921(1999).

62.          V. Chechersky, A. Nath, C. Michel, M. Hervieu, K. Ghosh, and R.L. Greene, “Emission Mossbauer study of the electronic phases in La 0.7 Ca 0.3 MnO3.” Phys. Rev. B, 62, 5316 (2000).

63.          A. Nath, V. Chechersky, and R.L. Greene, “The Origin of Bulk Magnetoresistivity in Manganites” Invited paper in honor of Prof Honig to J. Solid State Chemistry 55, 116 (2000). Invited Contribution.

64.          V.Chechersky, A.Nath, I. Isaac, J.P Franck, K Ghosh, and R.L.Greene,”Absence of Small Lattice Polarons above the Curie temperature in Magnetoresistive Manganites” Phys. Rev B 63, 052411(2001).

65.          A.Nath,M.Prushan,andJ.G.Gilbert,”Can Super-excited Molecules Survive Fragmentation?” J.Radioanalyt.Nucl.Chem. 247, 589 (2001).

66.          V.Chechersky, A.Nath, S.E.Lofland, S.Newlander, L.Cerquoni, Y.Mukovskii, A.A.Arsenov, G.Karabshev, D.A.Shulyatev, and R.L.Greene, "Magnetic Behavior of a La0.9Ca0.1MnO3 Crystal" Phys .Rev.B 6321, 4401 (2001).

67.          V. Chechersky and Amar Nath, "Anomalous magnetic and dynamic behavior in magnetoresistive compounds:origin of bulk magnetoresistivity" Low Temperature Physics 28, 781 (2002).

68.          A. Nath,Z. Klencsar, E. Kuzmann, Z. Homonnay, A. Vertes, A. Simopoulos, E. Devlin, G. Kallias, A.P. Ramirez, and R.J. Cava "Nanoscale Magnetism in the Chalcogenide Spinel FeCr2S4: Common Origin of Colossal Magnetoresistivity" Phys. Rev. B 66, 212401 (2002).

69.          E.Kuzmann,Z. Homonnay, A. Vertes, S. Li, H. Yin, Y. Wei, A. Nath, X. Chen, and J. Li, "Mössbauer Studies of the Interaction of Oxygen with Solid - Fe(II) Phthalocyanine", J.Solid State Chem. 170, 118 (2003).

70.          Amar Nath, Vladimir Chechersky, K.V. Ramanujachary, Robert Butterick Jr III, Sam Lofland, Steve Preite, “Emission Mössbauer studies of the magnetoresistive compound, La0.7Sr 0.3 MnO3”, Solid State Communications 138, 224 (2006).

71.          A. Khasanov, J.He, J.Gaillard, K.Yang, C. M. Cameron, J.M. Schmeltzer, J.G.Stevens, A.P.Rao, and A. Nath,”The Role of-Iron Nanoparticulates in the growth of Carbon Nanotubes”, Applied Physics Lett. 93, 013103 (2008).

72.          Amar Nath, “The Role of Emission Mössbauer Spectroscopy in the Study of Sophisticated Materials”, J. Nucl. Radiochem Sciences, Japan, 11, 1 (2010).

73.          R.Podila, W. Queen, A. Nath et al.“ Origin of FM Ordering in Pristine Micro and Nanostructured ZnO”, NANO Letters 10, 1383 (2010).

74.          A.Khasanov, S.C. Bhargava, J.G.Stevens, J.Jiang, J.D.Weiss, E.E.Hellstrom and A. Nath, “Mössbauer studies of the superconducting cobalt/nickel-doped BaFe2As2. Whither go the injected electron(s)? J.Phys,: Condens. Matter 23, 202201 (2011).

75.          A.Khasanov, J.Jiang, E.E.Hellstrom, and Amar Nath, ”Origin of the dynamics of the spin state in undoped BaFe2As2: Mössbauer Studies” J.Phys.:Condens.Matter 23, 342201 (2011).

76.          Amar Nath “A Physical Approach to Monitoring the Toxicity of Nanomaterials and its Remediation”, Chapter7, pp175-188 in ”New and Future Developments in Catalysis: Catalysis by Nanoparticles”  Edit. S. Suib. Elsevier (2013).