1. SEM images of (a, b) the commercial unprocessed Xuan paper, (c, d) ultralong HAP nanowires, (e, f) the as-prepared new type of nanocomposite “Xuan paper” based on ultralong HAP nanowires and cellulose fibers with HAP weight ratio of 25%

2. XRD patterns (a) and FT-IR spectra (b) of the commercial unprocessed Xuan paper, the as-prepared new type of nanocomposite “Xuan paper” with HAP weight ratio of 25%, and ultralong HAP nanowires

3. (a) Whiteness and tensile strength of the commercial unprocessed Xuan paper, the as-prepared new type of nanocomposite “Xuan paper” with HAP weight ratio of 25%, and ultralong HAP nanowires; (b) The diffusion heights of the as-prepared new type of nanocomposite “Xuan paper” with HAP weight ratios ranging from 0 to 100%, the paper as put vertically in deionized water and ink for absorption time of 5 min. The diffusion height was measured from the surface of water or ink upward

4. Digital images of six different kinds of paper samples and blank group after incubation with the group A for different time(a) Chaetomium globosum; (b) Trichoderma viride (long branch); (c) Aspergillus niger

5. Digital images of six different kinds of paper samples and blank group after incubation with the group B for different time(a) Chaetomium globosum; (b) Trichoderma viride (long branch); (c) Aspergillus niger

6. Digital images of six different kinds of paper samples after incubation without culture medium group for different time which is closer to the usual Xuan paper preservation conditions(a) Chaetomium globosum; (b) Trichoderma viride (long branch); (c) Aspergillus niger