Chen Yi, Tse Wai Hei, Chen Longyan, Zhang Jin
Department of Chemical & Biochemical Engineering, University of Western Ontario, 1151 Richmond Street, London, Ontario Canada N6A 5B9.
Department of Medical Biophysics, University of Western Ontario, 1151 Richmond Street, London, Ontario Canada N6A 5C1.
Nanoscale Res Lett. 2015 Mar 1;10:106. doi: 10.1186/s11671-014-0712-3. eCollection 2015.
Heteronanostructured zinc oxide nanorod (ZnO NR) array are vertically grown on polydimethylsiloxane (PDMS) through a hydrothermal method followed by an in situ deposition of silver nanoparticles (Ag NPs) through a photoreduction process. The Ag-ZnO heterostructured nanorods on PDMS are measured with an average diameter of 160 nm and an average length of 2 μm. ZnO NRs measured by high-resolution transmission electron microscope (HRTEM) shows highly crystalline with a lattice fringe of 0.255 nm, which corresponds to the (0002) planes in ZnO crystal lattice. The average diameter of the Ag NPs in situ deposited on the ZnO NRs is estimated at 22 ± 2 nm. As compared to the bare ZnO NRs, the heterostructured Ag-ZnO nanorod array shows enhanced ultraviolet (UV) absorption at 440 nm, and significant emission in the visible region (λem = 542 nm). In addition, the antimicrobial efficiency of Ag-ZnO heterostructured nanorod array shows obvious improvement as compared to bare ZnO nanorod array. The cytotoxicity of ZnO nanorod array with and without Ag NPs was studied by using 3 T3 mouse fibroblast cell line. No significant toxic effect is imposed on the cells.
通过水热法在聚二甲基硅氧烷（PDMS）上垂直生长异质纳米结构的氧化锌纳米棒（ZnO NR）阵列，随后通过光还原过程原位沉积银纳米颗粒（Ag NPs）。对PDMS上的Ag-ZnO异质结构纳米棒进行测量，其平均直径为160 nm，平均长度为2μm。通过高分辨率透射电子显微镜（HRTEM）测量的ZnO NRs显示出高度结晶性，晶格条纹为0.255 nm，这对应于ZnO晶格中的（0002）平面。原位沉积在ZnO NRs上的Ag NPs的平均直径估计为22±2 nm。与裸露的ZnO NRs相比，异质结构的Ag-ZnO纳米棒阵列在440 nm处显示出增强的紫外线（UV）吸收，并在可见光区域（λem = 542 nm）有显著发射。此外，与裸露的ZnO纳米棒阵列相比，Ag-ZnO异质结构纳米棒阵列的抗菌效率有明显提高。使用3T3小鼠成纤维细胞系研究了有无Ag NPs的ZnO纳米棒阵列的细胞毒性。对细胞没有施加明显的毒性作用。
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