Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Physical Behavior of Nanoporous Anodic Alumina Using Nanoindentation and Microhardness Tests | Nanoscale Res Lett 2007 2 410-415 DOI s11671-007-9076-2 NANO EXPRESS Physical Behavior of Nanoporous Anodic Alumina Using Nanoindentation and Microhardness Tests Te-Hua Fang Tong Hong Wang Chien-Hung Liu Liang-Wen Ji Shao-Hui Kang Received 14 May 2007 Accepted 16 June 2007 Published online 19 July 2007 to the authors 2007 Abstract In this paper the mechanical response and deformation behavior of anodic aluminum oxide AAO were investigated using experimental nanoindentation and Vickers hardness tests. The results showed the contact angle for the nanoporous AAO specimen was 105 and the specimen exhibited hydrophobic behavior. The hardness and the fracture strength of AAO were discussed and a three-dimensional finite element model FEM was also conducted to understand the nanoindentation-induced mechanism. Keywords Nanoindentation Anodic aluminum oxide AAO Porosity Hardness Finite element method FEM to its low cost and easy fabrication an anodization technique is used to synthesize nanoporous AAO. The size of the nanopores can be controlled by the voltages applied during anodization and the modulus and the hardness of nanoporous alumina has been shown to vary with the pore size 4 . The mechanical responses of the complicated network geometries of AAO can be simply measured by the size of couple pores although it is difficult to predict the responses theoretically. In this paper we investigate the mechanical properties of nanoporous AAO using nanoindentation and microhardness tests. The mechanism and properties were determined and discussed by experimental measurement as well as finite element analysis FEA . Introduction Anodic aluminum oxide AAO has attracted much attention due to its excellent physical and chemical properties. This material can be applied in the field of catalysis chemical biosensors templates for self-assembly filters nanofluidic transistors and humidity sensors 1-3 . Owing . Fang El . Kang Institute of Mechanical and .
