Fig. 7. CO2 adsorption isotherms for bare and hollow SiNRs (a) and PS-OS@SiNR (b) at 0 °C for all three different aspect ratios: 2.5 (blue symbols), 8 (black symbols) and 11 (red symbols). The adsorption (closed symbols) and desorption (open symbols) cycles in solvent-free PS-OS@SiNR show hysteresis. Control experiments of CO2 adsorption at 0 °C in the PS-OS mixture (b, magenta symbols) and PS (b, brown symbols) show minimal uptake.
