Figure 1.

Structure of wood pulp fibres. (a) Note the network of microfibrils covering the outer wall layer. (b) Microtomed cross section showing the S1, S2 and S3 layers. (c) Cross-sectional fracture area, showing the microfibrils in the S2 layer. Reproduced and modified from Chinga-Carrasco [11].

Chinga-Carrasco Nanoscale Research Letters 2011 6:417   doi:10.1186/1556-276X-6-417
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