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Ayyappan, S and Suryaprakash, N and Ramanathan, KV and Rao, CNR (1999) A Comparative Study of Water- and Benzene-Saturated Mesoporous Silicas by $^{1}H$ NMR Spectroscopy. In: Journal of Porous Materials, 6 (1). pp. 5-11.
Ayyappan, S and Rao, CNR (1997) Mesoporous aluminoborates. In: Chemical Communications (6). pp. 575-576.
Ayyappan, S and Gopalan, Srinivasa R and Subbanna, GN and Rao, CNR (1997) Nanoparticles of Ag, Au, Pd, and Cu produced by alcohol reduction of the salts. In: Journal of Materials Research, 12 (2). pp. 398-401.
Ayyappan, S and Rangavittal, N (1997) A thermal dehydration study of WO3.2H2O. In: Bulletien of Materials Science, 20 (1). pp. 103-109.
Ayyappan, S and Ulagappan, N and Rao, CNR (1996) Mesostructured lamellar chromium oxide. In: Journal of Materials Chemistry, 06 (10). pp. 1737-1738.
Ayyappan, S and Ulagappan, N (1996) Synthesis and catalytic properties of cobalt- and molybdenum-containing mesoporous MCM-41 molecular sieves. In: Proceedings of the Indian Academy of Sciences - Chemical Sciences, 108 (5). pp. 505-510.
Ayyappan, S and Subbanna, GN and Gopalan, Srinivasa R and Rao, CNR (1996) Nanoparticles of nickel and silver produced by the polyol reduction of the metal salts intercalated in montmorillonite. In: Solid State Ionics, 84 (3-4). pp. 271-281.
Ayyappan, S and Rao, CNR (1996) Insertion of nickel nanoparticles in the interlayers of alpha-zirconium phosphate by the decomposition of the intercalated nickel acetate. In: European Journal of Solid State and Inorganic Chemistry, 33 (8). pp. 737-749.
Ayyappan, S and Rao, CNR (1995) A Simple Method of Hydrogen Insertion in Transition Metal Oxides to Obtain Bronzes. In: Materials Research Bulletin, 30 (8). pp. 947-951.
Ayyappan, S and Subbanna, GN and Rao, CNR (1995) Novel Metastable Structures of WO3, MoO3 and W1-xMoxO3 Obtained by the Deintercalation of Layered Amine Adducts. In: Chemistry - A European Journal, 1 (3). pp. 165-170.
Nagarajan, R and Ayyappan, S and Rao, CNR (1994) Oxyanion derivatives of cuprate superconductors superconducting 123 phosphates. In: Physica C, 220 (3-4). pp. 373-376.
Rao, CNR and Nagarajan, R and Mahesh, R and Kulkarni, GV and Ayyappan, S and Subbanna, GN (1993) Structure and properties of oxyanion derivatives of 123 cuprate superconductors: effect of substitution of carbonate and nitrate ions in the Cu(1) position of $(YBaSrCu_3O_{7-\delta})$. In: Solid State Communications, 88 (10). pp. 757-760.
Ayyappan, S and Manivannan, V and Subbanna, GN and Rao, CNR (1993) Oxyanion Derivatives of Cuprate Superconductors: Superconducting Thallium Cuprate Oxysulfate $Tl_{0.5}Pb_{0.5}Sr_4Cu_2 (SO_4)O_y$. In: Solid State Communications, 87 (6). pp. 551-552.
