Figure 5.

Nitrogen adsorption-desorption isotherms and BJH pore diameter distribution (inset) of MCM-41 meso-ordered materials synthesized from three subsequent cycles: (a) M-1, (b) M-2 and (c) M-3. Solid symbols denoted adsorption, and open symbols denoted desorption.

Ng et al. Nanoscale Research Letters 2013 8:120   doi:10.1186/1556-276X-8-120
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