Citation Top 20 (Google Scholar)
＜ H-Index of 31 ＞

1. Times Cited: 520
   S.Nakayama, T.Kageyama, H.Aono, Y.Sadaoka
   Ionic conductivity of lanthanoid silicates, Ln₁₀(SiO₄)₆O₃ (Ln= La, Nd, Sm, Gd, Dy, Y, Ho, Er and Yb)
   Journal of Materials Chemistry, 5, 1801-1805 (1995).
   
   
2. Times Cited: 498
   S.Nakayama, M.Sakamoto
   Electrical properties of new type high oxide ionic conductor RE₁₀Si₆O₂₇ (RE= La, Pr, Nd, Sm, Gd, Dy)
   Journal of the European Ceramic Society, 18, 1413-1418 (1998).
   
   
3. Times Cited: 254
   S.Nakayama, H.Aono, Y.Sadaoka
   Ionic conductivity of Ln₁₀(SiO₄)₆O₃ (Ln= La, Nd, Sm, Gd and Dy)
   Chemistry Letters, 24, 431-432 (1995).
   
   
4. Times Cited: 221
   S.Nakayama, M.Sakamoto, M.Higuchi, K.Kodaira, M.Sato, S.Kakita, T.Suzuki, K.Itoh
   Oxide ionic conductivity of apatite type Nd_9.33(SiO₄)₆O₂ single crystal
   Journal of the European Ceramic Society, 19, 507-510 (1999).
   
   
5. Times Cited: 159
   S.Nakayama
   LaFeO₃ perovskite-type oxide prepared by oxide-mixing, co-precipitation and complex synthesis methods
   Journal of Materials Science, 36, 5643-5648 (2001).
   
   
6. Times Cited: 150
   A.Ikesue, Y.L.Aung, T.Yoda, S.Nakayama, T.Kamimura
   Fabrication and laser performance of polycrystal and single crystal Nd:YAG by advanced ceramic processing
   Optical Materials, 29, 1289-1294 (2007).
   
   
7. Times Cited: 111
   M.Higuchi, Y.Masubuchi, S.Nakayama, S.Kikkawa, K.Kodaira
   Single crystal growth and oxide ion conductivity of apatite-type rare-earth silicates
   Solid State Ionics, 174, 73-80 (2004).
   
   
8. Times Cited: 102
   S.Nakayama, M.Higuchi
   Electrical properites of apatite type oxide ionic conductors RE_9.33(SiO₄)₆O₂ (RE=Pr, Nd and Sm) single crystals
   Journal of Materials Science Letters, 20, 913-915 (2001).
   
   
9. Times Cited: 83
   S.Nakayama, M.Sakamoto, M.Highchi, K.Kodaira
   Ionic conductivities of apatite type Nd_x(SiO₄)₆O_1.5x-12 (x= 9.20 and 9.33) single crystals
   Journal of Materials Science Letters, 20, 1627-1629 (2000).
   
   
10. Times Cited: 79
    S.Nakayama, M.Okazaki, Y.L.Aung, M.Sakamoto
    Preparations of perovskite-type oxides LaCoO₃ from three different methods and their evaluation by homogeneity, sinterability and conductivity
    Solid State Ionics, 158, 133-139 (2003).
    
    
11. Times Cited: 71
    Y.Higuchi, M.Sugawara, K.Onishi, M.Sakamoto, S.Nakayama
    Oxide ionic conductivities of apatite-type lanthanum silicates and germanates and their possibilities as an electrolyte of lower temperature operating SOFC
    Ceramics International, 36, 955-959 (2010).
    
    
12. Times Cited: 69
    Y.Masubuchi, M.Higuchi, H.Katase, T.Takeda, S.Kikkawa, K.Kodaira, S.Nakayama
    Oxide ion conduction in Nd_9.33(SiO₄)₆O₂ and Sr₂Nd₈(SiO₄)₆O₂ single crystals grown by floating zone method
    Solid State Ionics, 166, 213-217 (2004).
    
    
13. Times Cited: 66
    S.Nakayama, Y.Higuchi, Y.Kondo, M.Sakamoto
    Effects of cation- or oxide ion-defect on conductivities of apatite-type La-Ge-O system ceramics
    Solid State Ionics, 170, 219-223 (2004).
    
    
14. Times Cited: 65
    C.Minamoto, N.Fujiwara, Y.Shigekawa, K.Tada, J.Yano,T.Yokayama, Y.Minamoto, S.Nakayama
    Effect of acidic conditions on decomposition of methylene blue in aqueous solution by air microbubbles
    Chemosphere, 263, 128141 (2021).
    
    
15. Times Cited: 65
    S.Nakayama, M.Sakamoto
    Ionic conductivities of apatite-type La_x(GeO₄)₆O_1.5x-12 (x= 8 - 9.33) polycrystals
    Journal of Materials Science Letters, 20, 1627-1629 (2001).
    
    
16. Times Cited: 60
    M.Higuchi, H.Katase, K.Kodaira, S.Nakayama
    Float zone growth and characterization of Pr_9.33(SiO₄)₆O₂ and Sm_9.33(SiO₄)₆O₂ single crystals with an apatite structure
    Journal of Crystal Growth, 218, 282-286 (2000).
    
    
17. Times Cited: 60
    S.Nakayama, K.Itoh
    Immobilization of strontium by crystalline zirconium phosphate
    Journal of the European Ceramic Society, 23, 1047-1052 (2003).
    
    
18. Times Cited: 58
    M.Higuchi, K.Kodaira, S.Nakayama
    Growth of apatite-type neodymium silicate single crystals by the floating-zone method
    Journal of Crystal Growth, 207, 298-302 (1999).
    
    
19. Times Cited: 57
    M.Higuchi, K.Kodaira, S.Nakayama
    Nonstoichiometry in apatite-type neodymium silicate single crystals
    Journal of Crystal Growth, 216, 317-321 (2000).
    
    
20. Times Cited: 54
    S.Nakayama, A.Ikesue, Y.Higuchi, M.Sugawara, M.Sakamoto
    Growth of single-crystals of apatite-type oxide ionic conductor from sintered ceramics by a seeding method
    Journal of the European Ceramic Society, 33, 207-210 (2013).