Arkusz Katarzyna, Jędrzejewska Aleksandra, Siwak Piotr, Jurczyk Mieczysław
Department of Biomedical Engineering, Faculty of Mechanical Engineering, University of Zielona Gora, 9 Licealna Street, 65-417 Zielona Gora, Poland.
Institute of Mechanical Technology, Faculty of Mechanical Engineering, Poznan University of Technology, 3 Piotrowo Street, 60-965 Poznan, Poland.
Materials (Basel). 2024 May 2;17(9):2138. doi: 10.3390/ma17092138.
This study aimed to investigate the fabrication and characterization of hexagonal titanium dioxide nanotubes (hTNTs) compared to compact TiO layers, focusing on their structural, electrochemical, corrosion, and mechanical properties. The fabrication process involved the sonoelectrochemical anodization of titanium foil in various electrolytes to obtain titanium oxide layers with different morphologies. Scanning electron microscopy revealed the formation of well-ordered hexagonal TNTs with diagonals in the range of 30-95 nm and heights in the range of 3500-4000 nm (35,000-40,000 Å). The electrochemical measurements performed in 3.5% NaCl and Ringer's solution confirmed a more positive open-circuit potential, a lower impedance, a higher electrical conductivity, and a higher corrosion rate of hTNTs compared to the compact TiO. The data revealed a major drop in the impedance modulus of hTNTs, with a diagonal of 46 ± 8 nm by 97% in 3.5% NaCl and 96% in Ringer's solution compared to the compact TiO. Nanoindentation tests revealed that the mechanical properties of the hTNTs were influenced by their diagonal size, with decreasing hardness and Young's modulus observed with an increasing diagonal size of the hTNTs, accompanied by increased plastic deformation. Overall, these findings suggest that hTNTs exhibit promising structural and electrochemical properties, making them potential candidates for various applications, including biosensor platforms.
本研究旨在研究与致密TiO层相比，六方二氧化钛纳米管（hTNTs）的制备及其特性，重点关注其结构、电化学、腐蚀和机械性能。制备过程包括在各种电解质中对钛箔进行超声电化学阳极氧化，以获得具有不同形态的氧化钛层。扫描电子显微镜显示形成了排列有序的六方纳米管，其对角线范围为30-95纳米，高度范围为3500-4000纳米（35000-40000埃）。在3.5%氯化钠溶液和林格氏溶液中进行的电化学测量证实，与致密TiO相比，hTNTs具有更正的开路电位、更低的阻抗、更高的电导率和更高的腐蚀速率。数据显示，与致密TiO相比，对角线为46±8纳米的hTNTs在3.5%氯化钠溶液中的阻抗模量下降了97%，在林格氏溶液中下降了96%。纳米压痕测试表明，hTNTs的机械性能受其对角线尺寸的影响，随着hTNTs对角线尺寸的增加，硬度和杨氏模量降低，同时塑性变形增加。总体而言，这些发现表明hTNTs具有良好的结构和电化学性能，使其成为包括生物传感器平台在内的各种应用的潜在候选材料。
