Silica gel fabrication of [60]fullerene aggregates and carbon nanotubes utilizing the amphiphilic nature of poly(N-vinylpyrrolidone) as a ?glue?Electronic supplementary information (ESI) available: Fig. 1S: (a) SEM image of string-like structure of silica obtained at high concentrations of the reactants and (b) SEM image of silica obtained without PVP. Fig. 2S: TG analysis of PVP (temperature increase 10 �C min?1). Fig. 3S: Raman spectra of (a) SWNTs/PVP/silica ternary composite, (b) SWNTs/silica binary composite after calcination at 500 �C and (c) hollow silica after calcination at 1000 �C. See http://www.rsc.org/suppdata/jm/b3/b305314h/