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Why is the Specific Surface Area (SSA) Spec Lower Than Theoretically Possible?

April 26, 2017area lower possible Spec SSA theoretically

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Why is the Specific Surface Area (SSA) Spec Lower Than Theoretically Possible?

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The theoretical Specific Surface area of swnts is about 1300m2/g. We test the SSA of our CNTs through the nitrogen adsorbing method. As many of you know, the SWNTs are clumps of tubes. So there are many areas can’t adsorb the nitrogen. So the testing data is often lower than expected and we spec the SSA of our SWNTs at 407m2/g.