NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , Singapore 117456.
Langmuir. 2014 Mar 4;30(8):2206-15. doi: 10.1021/la404419h. Epub 2014 Feb 21.
We present the results of a systematic study on the porosity of silica microparticles and nanowires prepared by glancing angle deposition-metal-assisted chemical etching (GLAD-MACE) and interference lithography-metal-assisted chemical etching (IL-MACE) techniques using the thermoporometry (TPM) method. Good agreement was obtained between our TPM results and published data provided by the suppliers of silica microparticles. TPM characterization of the GLAD-MACE and IL-MACE nanowires was carried out on the basis of parameters obtained from TPM experiments on microparticles. Our nanowires showed a similar trend but lower values of the pore volume and surface area than nanowires prepared by MACE with AgNO3 solution. We attribute the enhanced bioanalysis performance of the GLAD-MACE nanowires based devices to the increased pore volume and total surface area of the nanowires.
我们展示了使用热导法（TPM）对通过掠角沉积-金属辅助化学刻蚀（GLAD-MACE）和干涉光刻-金属辅助化学刻蚀（IL-MACE）技术制备的二氧化硅微球和纳米线的多孔性进行系统研究的结果。我们的 TPM 结果与二氧化硅微球供应商提供的已发表数据吻合良好。根据 TPM 实验在微球上获得的参数，对 GLAD-MACE 和 IL-MACE 纳米线进行了 TPM 表征。我们的纳米线表现出相似的趋势，但孔体积和比表面积均低于用 AgNO3 溶液进行 MACE 制备的纳米线。我们将 GLAD-MACE 纳米线基器件的增强生物分析性能归因于纳米线的孔体积和总表面积的增加。
