以人发为生物模板, 用溶胶-凝胶法对人发的表皮结构进行了复制. 其中以TEOS和水玻璃为前驱体时头发结构未得到复制, 而以钛酸四丁酯为前驱体, 得到二氧化钛微米管, 微米管的外壁由屋顶瓦状排列的多孔二氧化钛层片组成, 类似于头发表皮层结构. 微米管上的纳米孔可以作为纳米反应器原位合成金属纳米粒子. 微米管道、纳米孔与贵金属纳米粒子在这个体系中结合起来, 因此在催化、吸附与分离等领域可能具有潜在的应用前景.
The structure of hair was replicated via a sol-gel process using human hair as the template. When using silicate and TEOS as the precursor, the cell structure of hair cuticle was not well replicated. When using Ti (OnBu)4 as the precursor, however, titania microtubes were obtained, with nanopores in their wall and nanoporous platelets on their outer surfaces, which were derived from cuticle cells on hair surfaces. The nanopores in the microtubes acted as an effective nanoreactor for in situ synthesis of Au nanoparticles. The microchannels, nanopores and noble metal nanoparticles may provide a unique combination that would be attractive in such applications as catalysis, adsorption, and separation.
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